/* ==========================================================================
   FAUNASCAPE — Design System & Stylesheet (Aquascaping Italia)
   ========================================================================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..900&family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables for Light / Dark Mode */
:root {
  /* Color Palette - Light Mode (Aquatic) */
  --bg-primary: #f0f8ff; /* Alice Blue */
  --bg-secondary: #ffffff;
  --bg-tertiary: #e6f2ff;
  --bg-dark-accent: #002b4d;
  --text-primary: #0a192f;
  --text-secondary: #2c4a6b;
  --text-light: #6486a6;
  --text-on-dark: #ffffff;
  
  --primary: #00b894; /* Bright Aquatic Green */
  --primary-hover: #00967a;
  --primary-light: #e6f9f4;
  
  --secondary: #0984e3; /* Water Blue */
  --secondary-light: #e6f3fd;
  
  --accent: #00cec9; /* Cyan Accent */
  --accent-hover: #00b5b1;
  --accent-light: #e6faf9;
  
  --border-color: #d1e5f5;
  --border-light: #e3eff8;
  
  --success: #00b894;
  --warning: #fdcb6e;
  --danger: #d63031;
  
  /* Layout & Shadows */
  --font-serif: 'Fraunces', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(26, 67, 49, 0.04);
  --shadow-md: 0 10px 30px rgba(26, 67, 49, 0.06), 0 2px 6px rgba(26, 67, 49, 0.02);
  --shadow-lg: 0 20px 40px rgba(26, 67, 49, 0.1), 0 4px 12px rgba(26, 67, 49, 0.03);
  
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(26, 67, 49, 0.08);
  --glass-backdrop: blur(12px);
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark-mode {
  /* Color Palette - Dark Mode (Aquatic) */
  --bg-primary: #0a1128; /* Deep Navy Blue */
  --bg-secondary: #121c3a; /* Navy Card */
  --bg-tertiary: #1b284f; /* Lighter Navy */
  --bg-dark-accent: #050814;
  --text-primary: #f0f8ff;
  --text-secondary: #8da4d0;
  --text-light: #5b75a6;
  --text-on-dark: #ffffff;
  
  --primary: #00cec9; /* Glowing Cyan/Teal */
  --primary-hover: #48dbfb;
  --primary-light: #123e4a;
  
  --secondary: #0984e3; /* Water Blue */
  --secondary-light: #16365c;
  
  --accent: #00b894; /* Bright Green */
  --accent-hover: #55efc4;
  --accent-light: #164036;
  
  --border-color: #21325b;
  --border-light: #172445;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);
  
  --glass-bg: rgba(17, 29, 23, 0.8);
  --glass-border: rgba(82, 183, 136, 0.15);
  
  --success: #52b788;
  --warning: #f4a261;
  --danger: #e76f51;
}

/* ==========================================================================
   Resets & Base Styles
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-light);
}

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
h1, h2, h3, h4, .font-serif {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.65rem); }
h4 { font-size: 1.2rem; }

.text-muted { color: var(--text-secondary); }
.text-small { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-accent { color: var(--accent); }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.container {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section-padding {
  padding-block: 4.5rem;
}

@media (max-width: 768px) {
  .section-padding {
    padding-block: 3rem;
  }
}

/* Flex & Grid Utils */
.flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-on-dark);
}
.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--text-light);
  transform: translateY(-1px);
}

.btn-accent {
  background-color: var(--accent);
  color: var(--text-on-dark);
}
.btn-accent:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  padding: 0;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.btn-icon:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-light);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-primary {
  background-color: var(--primary-light);
  color: var(--primary);
}
.badge-accent {
  background-color: var(--accent-light);
  color: var(--accent);
}
.badge-success {
  background-color: rgba(45, 106, 79, 0.1);
  color: var(--success);
}
.badge-pro {
  background: linear-gradient(135deg, var(--accent) 0%, #ff8c5a 100%);
  color: var(--text-on-dark);
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(217, 106, 67, 0.2);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--glass-bg);
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-backdrop);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--primary);
  display: flex;
  align-items: center;
}

.logo-img {
  width: 2.2rem;
  height: 2.2rem;
  object-fit: cover;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.main-nav {
  display: flex;
  list-style: none;
  gap: 1rem;
}

.main-nav a {
  font-weight: 500;
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.25rem;
  position: relative;
}

.main-nav a:hover,
.main-nav li.active a {
  color: var(--text-primary);
}

.main-nav li.active a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Profile Trigger */
.profile-trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  transition: all var(--transition-fast);
}
.profile-trigger:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--text-light);
}
.profile-avatar {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  color: var(--text-on-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

/* Mobile Nav Toggle */
.menu-toggle {
  display: none;
}

@media (max-width: 900px) {
  .main-nav {
    display: none; /* In a real build, we'd have a drawer, we will adapt it to responsive dropdown */
  }
}

/* ==========================================================================
   Home Hero
   ========================================================================== */
.hero {
  position: relative;
  background-color: var(--bg-dark-accent);
  color: var(--text-on-dark);
  overflow: hidden;
  padding-block: 6rem;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.12;
  mix-blend-mode: overlay;
  background-size: cover;
  background-position: center;
  filter: grayscale(30%) contrast(110%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 750px;
}

.hero-subtitle {
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.15em;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: inline-block;
}

.hero-title {
  margin-bottom: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.hero-title strong {
  font-weight: 800;
}

.hero-description {
  font-size: 1.2rem;
  line-height: 1.7;
  color: rgba(251, 250, 247, 0.8);
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Home Layout & Main Content Screens
   ========================================================================== */
.app-view {
  display: none; /* Managed by JS */
}

.app-view.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-title-area {
  margin-bottom: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.section-headline {
  position: relative;
}

.section-headline::after {
  content: '';
  position: absolute;
  bottom: -1rem;
  left: 0;
  width: 60px;
  height: 3px;
  background-color: var(--primary);
}

body.dark-mode .section-headline::after {
  background-color: var(--primary);
}

/* Cards Grid Layout */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.card-grid-products {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

/* General Card Design */
.card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--text-light);
}

.card-img-wrapper {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.card-img {
  width: 100%;
  height: 100%;
  transition: transform var(--transition-slow);
}

.card:hover .card-img {
  transform: scale(1.05);
}

.card-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
}

.card-content {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.card-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  /* line-clamp */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  line-clamp: 3;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

/* ==========================================================================
   Voting Interface (Reddit Style)
   ========================================================================== */
.voting-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-tertiary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
}

.vote-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  min-width: 1.5rem;
  min-height: 1.5rem;
  padding: 0 0.5rem;
  gap: 0.25rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.vote-btn:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.vote-btn.voted-up {
  color: var(--success);
}

.vote-btn.voted-down {
  color: var(--danger);
}

.vote-score {
  min-width: 1.5rem;
  text-align: center;
}

/* ==========================================================================
   Filter and Search Bar
   ========================================================================== */
.filter-search-bar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.search-input {
  width: 100%;
  background-color: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1rem 0.65rem 2.5rem;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.search-input:focus {
  background-color: var(--bg-secondary);
  border-color: var(--primary);
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  width: 1.15rem;
  height: 1.15rem;
  fill: var(--text-light);
  pointer-events: none;
}

.select-filter {
  background-color: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.65rem 2rem 0.65rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2356685c'%3E%3Cpath d='M7 10l5 5 5-5H7z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25rem;
  transition: all var(--transition-fast);
}

.select-filter:focus {
  background-color: var(--bg-secondary);
  border-color: var(--primary);
}

@media (max-width: 768px) {
  .filter-search-bar {
    grid-template-columns: 1fr;
  }
}

/* Category Filter Tabs */
.category-tabs {
  display: flex;
  overflow-x: auto;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  scrollbar-width: thin;
}

.tab-btn {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  font-weight: 500;
  font-size: 0.85rem;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--text-light);
}

.tab-btn.active {
  background-color: var(--primary);
  color: var(--text-on-dark);
  border-color: var(--primary);
}

/* ==========================================================================
   Product Detail Screen
   ========================================================================== */
.product-detail-layout {
  display: grid;
  grid-template-columns: 4fr 5fr;
  gap: 3.5rem;
  margin-bottom: 4rem;
}

@media (max-width: 900px) {
  .product-detail-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.product-gallery {
  position: sticky;
  top: 6.5rem;
}

.product-img-main {
  aspect-ratio: 4 / 3;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  background-color: var(--bg-secondary);
}

.product-meta-header {
  margin-bottom: 1.5rem;
}

.product-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 0.5rem;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  margin-block: 2rem;
}

.spec-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.spec-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.spec-value {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary);
}

/* Reviews section */
.reviews-container {
  border-top: 1px solid var(--border-color);
  padding-block-start: 2rem;
  margin-top: 3rem;
}

.reviews-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.review-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
}

.review-votes {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: var(--bg-tertiary);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  align-self: start;
}

.review-content-area {
  display: flex;
  flex-direction: column;
}

.review-author {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-block: 0.5rem 1rem;
}

.review-meta {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ==========================================================================
   Tank Showcase Details (MOC Style)
   ========================================================================== */
.tank-detail-header {
  position: relative;
  background-color: var(--bg-dark-accent);
  color: var(--text-on-dark);
  padding-block: 4.5rem;
  border-radius: var(--radius-lg);
  margin-bottom: 3rem;
  overflow: hidden;
}

.tank-detail-header-bg {
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-size: cover;
  background-position: center;
  filter: blur(4px);
}

.tank-header-content {
  position: relative;
  z-index: 1;
}

.tank-quick-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-block-start: 1.5rem;
  font-size: 0.95rem;
}

.tank-quick-spec-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(255, 255, 255, 0.08);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
}

.tank-main-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
}

@media (max-width: 900px) {
  .tank-main-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.tank-gallery {
  margin-bottom: 2rem;
}

.tank-gallery-main {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.timeline-scroller {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.timeline-thumb {
  flex-shrink: 0;
  width: 100px;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  opacity: 0.7;
  transition: all var(--transition-fast);
}

.timeline-thumb:hover {
  opacity: 1;
}

.timeline-thumb.active {
  border-color: var(--accent);
  opacity: 1;
}

.tank-description {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

/* Sidebar MOC Specs */
.tank-spec-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 6.5rem;
}

.tank-spec-section {
  margin-bottom: 1.5rem;
}

.tank-spec-section:last-child {
  margin-bottom: 0;
}

.tank-spec-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 0.25rem;
  font-weight: 700;
}

.tank-spec-list {
  list-style: none;
}

.tank-spec-list li {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
}

.tank-spec-list li span:first-child {
  color: var(--text-secondary);
}

.tank-spec-list li span:last-child {
  font-weight: 600;
}

/* Fert table styling */
.fert-schedule {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.fert-schedule th, .fert-schedule td {
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  text-align: left;
}

.fert-schedule th {
  background-color: var(--bg-tertiary);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
}

/* List with links style */
.linked-list {
  list-style: none;
}

.linked-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.linked-list li a {
  font-weight: 600;
  color: var(--primary);
}
.linked-list li a:hover {
  color: var(--accent);
}

/* ==========================================================================
   My Aquarium / Logbook Dashboard
   ========================================================================== */
.logbook-layout {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 2.5rem;
}

@media (max-width: 850px) {
  .logbook-layout {
    grid-template-columns: 1fr;
  }
}

.my-tanks-sidebar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tank-tab {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: left;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.tank-tab:hover {
  border-color: var(--text-light);
  transform: translateX(2px);
}

.tank-tab.active {
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.tank-tab-img {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-sm);
  background-color: var(--border-color);
}

.tank-tab-info {
  display: flex;
  flex-direction: column;
}

.tank-tab-name {
  font-weight: 700;
  font-size: 1rem;
}

/* Dashboard Panel */
.dashboard-panel {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 1.5rem;
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 600px) {
  .dashboard-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-box {
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

.stat-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

/* Chart Canvas Area */
.chart-container {
  margin-bottom: 3rem;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.chart-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.85rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.legend-color {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
}

.svg-chart {
  width: 100%;
  height: 250px;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 1.5rem 1rem 1rem 1.5rem;
}

/* Logs and Reminders List */
.logs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .logs-grid {
    grid-template-columns: 1fr;
  }
}

.log-section-title {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.reminder-list, .measurement-list {
  list-style: none;
}

.reminder-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  border-left: 4px solid var(--accent);
}

.reminder-item.done {
  border-left-color: var(--success);
  opacity: 0.6;
}

.reminder-item.done span {
  text-decoration: line-through;
}

.measurement-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-light);
}

.measurement-values {
  display: flex;
  gap: 0.75rem;
  font-weight: 700;
}

.measurement-date {
  color: var(--text-secondary);
}

/* ==========================================================================
   Modals & Form Overlays (HTML Dialog)
   ========================================================================== */
dialog {
  margin: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  max-width: 500px;
  width: calc(100% - 2rem);
  box-shadow: var(--shadow-lg);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

dialog::backdrop {
  background-color: rgba(17, 42, 29, 0.4);
  backdrop-filter: blur(6px);
}

body.dark-mode dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.6);
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.dialog-close {
  font-size: 1.5rem;
  color: var(--text-light);
  line-height: 1;
}

.dialog-close:hover {
  color: var(--text-primary);
}

/* Form Styles */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-control:focus {
  background-color: var(--bg-secondary);
  border-color: var(--primary);
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 2rem;
}

/* ==========================================================================
   User Profile Screen
   ========================================================================== */
.profile-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 3rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2.5rem;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
  .profile-card {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }
}

.profile-avatar-large {
  width: 6.5rem;
  height: 6.5rem;
  border-radius: 50%;
  background-color: var(--primary);
  color: var(--text-on-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-family: var(--font-serif);
  font-weight: bold;
  border: 4px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.profile-info {
  display: flex;
  flex-direction: column;
}

.profile-name {
  font-size: 2rem;
  margin-bottom: 0.25rem;
}

.profile-role-badge {
  align-self: flex-start;
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .profile-role-badge {
    align-self: center;
  }
}

.profile-stats-row {
  display: flex;
  gap: 2rem;
  margin-block-start: 1rem;
}

.profile-stat {
  display: flex;
  flex-direction: column;
}

.profile-stat-val {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
}

.profile-stat-lbl {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* Badge list */
.badge-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ==========================================================================
   Premium Pitch Section (Upgrade CTA)
   ========================================================================== */
.premium-card {
  background: linear-gradient(135deg, var(--bg-dark-accent) 0%, #0d1e15 100%);
  color: var(--text-on-dark);
  border-radius: var(--radius-lg);
  padding: 3rem;
  margin-top: 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.premium-card-accent-border {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, #ff8c5a 100%);
}

.premium-card-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin-inline: auto;
}

.premium-title {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.premium-desc {
  color: rgba(251, 250, 247, 0.85);
  margin-bottom: 2rem;
}

.premium-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 600px) {
  .premium-features {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

.premium-feature-item {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.premium-feature-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.25rem;
  color: var(--accent);
}

.premium-feature-desc {
  font-size: 0.8rem;
  color: rgba(251, 250, 247, 0.7);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.main-footer {
  background-color: var(--bg-dark-accent);
  color: rgba(251, 250, 247, 0.7);
  padding-block: 4.5rem 3rem;
  margin-block-start: 6rem;
  border-top: 1px solid var(--glass-border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-brand-title {
  font-family: var(--font-serif);
  color: var(--text-on-dark);
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.footer-col h5 {
  color: var(--text-on-dark);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
  font-weight: 700;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.75rem;
}

.footer-col ul a:hover {
  color: var(--text-on-dark);
}

.footer-bottom {
  border-top: 1px solid rgba(251, 250, 247, 0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Theme Switcher */
.theme-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-tertiary);
  padding: 0.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.theme-btn {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-btn.active {
  background-color: var(--bg-secondary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Notification Toasts */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 1rem;
  transform: translateY(100px);
  opacity: 0;
  animation: slideInUp 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast.toast-accent {
  border-left-color: var(--accent);
}

@keyframes slideInUp {
  to { transform: translateY(0); opacity: 1; }
}

.toast-close {
  font-weight: bold;
  cursor: pointer;
  color: var(--text-light);
  margin-left: auto;
}

/* Onboarding Wizard */
.onboarding-wizard {
  max-width: 550px;
  margin: 3rem auto;
  padding: 2.5rem;
  text-align: center;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.onboarding-step {
  animation: fadeIn 0.4s ease;
}

.onboard-choice-btn {
  text-align: left;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.onboard-choice-btn:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.onboard-style-btn {
  padding: 1.25rem;
  text-align: left;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  height: auto;
}

.onboard-style-btn:hover {
  background-color: var(--accent-light);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* Water & Eco Parameters Calculator Styles */
.calculator-layout {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: 2.5rem;
  align-items: stretch;
}

.calculator-results-wrapper {
  min-height: 500px;
}

.badge-danger {
  background: rgba(231, 111, 81, 0.1);
  color: var(--danger);
  border: 1px solid rgba(231, 111, 81, 0.2);
}

body.dark-mode .badge-danger {
  background: rgba(231, 111, 81, 0.2);
  color: #ff8c7a;
  border-color: rgba(231, 111, 81, 0.3);
}

.badge-success {
  background: rgba(45, 106, 79, 0.1);
  color: var(--success);
  border: 1px solid rgba(45, 106, 79, 0.2);
}

body.dark-mode .badge-success {
  background: rgba(82, 183, 136, 0.15);
  color: #74c69d;
  border-color: rgba(82, 183, 136, 0.25);
}

.badge-accent {
  background: rgba(217, 106, 67, 0.1);
  color: var(--accent);
  border: 1px solid rgba(217, 106, 67, 0.2);
}

body.dark-mode .badge-accent {
  background: rgba(242, 144, 107, 0.15);
  color: #f2906b;
  border-color: rgba(242, 144, 107, 0.25);
}

@media (max-width: 900px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }
}

/* Product Ideal Parameters Gauges styling */
.parameters-gauge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.param-gauge-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.param-gauge-card:hover {
  transform: translateY(-2px);
  border-color: var(--text-light);
}

.param-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.param-icon {
  font-size: 1.25rem;
}

.param-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.param-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.param-track-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-light);
}

.track-edge {
  font-weight: 600;
}

.param-track-bar {
  flex-grow: 1;
  height: 6px;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
}

.param-track-highlight {
  position: absolute;
  top: 0;
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-hover) 100%);
}

.param-track-highlight.temp-highlight {
  background: linear-gradient(90deg, #ff8c5a 0%, #ff5252 100%);
}

.param-track-highlight.gh-highlight {
  background: linear-gradient(90deg, #00b0ff 0%, #00e5ff 100%);
}

.param-track-highlight.kh-highlight {
  background: linear-gradient(90deg, #7c4dff 0%, #00e676 100%);
}

.param-gauge-card.text-card {
  justify-content: flex-start;
}

.param-gauge-card.text-card .param-value {
  margin-bottom: 0.5rem;
}

.param-text-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0;
}

/* Scaper Advice styling */
.scaper-advice-box {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.scaper-advice-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.scaper-avatar {
  font-size: 2rem;
}

.scaper-meta {
  display: flex;
  flex-direction: column;
}

.scaper-meta strong {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.scaper-meta span {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.scaper-advice-content {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin: 0;
}

/* Purchase links styling */
.purchase-links-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.purchase-item-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.purchase-item-card:hover {
  transform: translateY(-1px);
  border-color: var(--text-light);
}

.purchase-vendor-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.vendor-icon {
  font-size: 1.5rem;
}

.vendor-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
}

.vendor-shipping {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.purchase-price-action {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.purchase-price {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
}

.purchase-btn {
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

/* ==========================================================================
   Private Chat & Moderation Styles
   ========================================================================== */
.messages-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: 600px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .messages-layout {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 500px;
  }
}

.messages-sidebar {
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  background-color: var(--bg-secondary);
  position: relative;
}

.messages-search-area {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  position: relative;
}

.search-suggestions-box {
  position: absolute;
  top: 100%;
  left: 1rem;
  right: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  max-height: 200px;
  overflow-y: auto;
}

.search-suggestion-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
}

.search-suggestion-item:last-child {
  border-bottom: none;
}

.search-suggestion-item:hover {
  background-color: var(--bg-tertiary);
}

.messages-list-wrapper {
  flex-grow: 1;
  overflow-y: auto;
}

.conversation-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.conversation-item:hover {
  background-color: var(--bg-tertiary);
}

.conversation-item.active {
  background-color: var(--primary-light);
  border-left: 3px solid var(--primary);
}

.conversation-item-info {
  flex-grow: 1;
  overflow: hidden;
}

.conversation-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.25rem;
}

.conversation-item-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-primary);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conversation-item-time {
  font-size: 0.75rem;
  color: var(--text-light);
}

.conversation-item-preview {
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
}

.messages-chat-pane {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-tertiary);
  height: 100%;
  overflow: hidden;
}

.messages-empty-state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 3rem;
  height: 100%;
  color: var(--text-light);
}

.messages-active-chat {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.messages-chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.active-chat-user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.active-chat-avatar {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.1rem;
}

.messages-history {
  flex-grow: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message-bubble-wrapper {
  display: flex;
  width: 100%;
}

.message-bubble-wrapper.sent {
  justify-content: flex-end;
}

.message-bubble-wrapper.received {
  justify-content: flex-start;
}

.message-bubble {
  max-width: 70%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
}

.message-bubble-wrapper.sent .message-bubble {
  background-color: var(--primary);
  color: var(--text-on-dark);
  border-bottom-right-radius: 0;
}

.message-bubble-wrapper.received .message-bubble {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 0;
}

.message-meta {
  display: block;
  font-size: 0.7rem;
  margin-top: 0.35rem;
  opacity: 0.75;
  text-align: right;
}

.message-bubble-wrapper.sent .message-meta {
  color: rgba(255, 255, 255, 0.7);
}

.message-bubble-wrapper.received .message-meta {
  color: var(--text-light);
}

.messages-input-area {
  display: flex;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.messages-input-area textarea {
  flex-grow: 1;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  font-family: inherit;
  font-size: 0.9rem;
  max-height: 80px;
}

/* Moderation reports styling */
.report-item-card {
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--danger);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  background-color: var(--bg-secondary);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.report-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.report-item-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.report-item-reason {
  font-size: 0.9rem;
  padding: 0.75rem;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--text-light);
  margin: 0;
}

.report-item-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* Estimative Index Calculator Styling */
.ei-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}
.ei-table th, .ei-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}
.ei-table th {
  font-weight: 700;
  color: var(--primary);
  background-color: var(--bg-tertiary);
}
.ei-calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
  margin-top: 1rem;
}
@media (max-width: 850px) {
  .ei-calendar {
    grid-template-columns: 1fr;
  }
}
.ei-day-card {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.ei-day-name {
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.ei-day-value {
  font-size: 0.8rem;
  font-weight: 600;
}
.ei-day-card.macro {
  border-top: 3px solid var(--primary);
}
.ei-day-card.micro {
  border-top: 3px solid var(--accent);
}
.ei-day-card.rest {
  border-top: 3px solid var(--text-light);
}
.ei-day-card.water-change {
  border-top: 3px solid #00b0ff;
}

/* ==========================================================================
   ARTICLES & GUIDE SECTION STYLING
   ========================================================================== */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
  margin-top: 1.5rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  cursor: pointer;
  overflow: hidden;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

.article-card-image {
  height: 180px;
  width: 100%;
  object-fit: cover;
  background-color: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-light);
}

.article-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.article-card-summary {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-light);
  padding-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Article Detail Content Styling */
.article-content-wrapper {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

@media (max-width: 640px) {
  .article-content-wrapper {
    padding: 1.5rem 1rem;
  }
}

.article-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.article-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 1rem;
}

@media (max-width: 640px) {
  .article-title {
    font-size: 1.75rem;
  }
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-cover-img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 2rem;
  border: 1px solid var(--border-light);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h1, 
.article-body h2, 
.article-body h3 {
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 700;
  line-height: 1.3;
}

.article-body h1 { font-size: 1.75rem; border-bottom: 1px solid var(--border-light); padding-bottom: 0.5rem; }
.article-body h2 { font-size: 1.45rem; }
.article-body h3 { font-size: 1.25rem; }

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body ul, 
.article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body code {
  background-color: var(--bg-tertiary);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-xs);
  font-size: 0.9em;
  font-family: monospace;
  color: var(--accent);
}

.article-body pre {
  background-color: var(--bg-tertiary);
  padding: 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-color);
}

.article-body pre code {
  background-color: transparent;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-primary);
}

/* Paywall with fading blur styling */
.premium-blur-container {
  position: relative;
  overflow: hidden;
  margin-top: 1.5rem;
  min-height: 380px;
}

.premium-blur-content {
  filter: blur(8px);
  opacity: 0.25;
  user-select: none;
  pointer-events: none;
}

.premium-paywall-box {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding: 2rem 1rem;
  background: linear-gradient(to bottom, transparent, var(--bg-secondary) 50%);
  z-index: 10;
  text-align: center;
}

.paywall-card {
  width: 100%;
  max-width: 480px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-top: 4px solid var(--accent);
  box-shadow: var(--shadow-lg);
  padding: 2.25rem;
  border-radius: var(--radius-md);
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Dropdown Menus */
.dropdown-menu {
  display: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  box-shadow: var(--shadow-lg);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
}

.dropdown-menu.show {
  display: block !important;
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateY(0) !important;
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: 0.6rem 1.2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  border: none;
  background: none;
  text-align: left;
  cursor: pointer;
  box-sizing: border-box;
}

.dropdown-item:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.dropdown-menu-right {
  right: 0;
  left: auto;
}

.dropdown-toggle {
  user-select: none;
}

/* ==========================================================================
   🏬 SEZIONE PARTNER & SPONSOR UFFICIALI
   ========================================================================== */
.card-grid-partners {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.partner-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  overflow: hidden;
}

.partner-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.partner-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.partner-logo-wrapper {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--secondary-light), var(--accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  flex-shrink: 0;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

body.dark-mode .partner-logo-wrapper {
  background: linear-gradient(135deg, rgba(9, 132, 227, 0.2), rgba(0, 184, 148, 0.2));
}

.partner-card-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.partner-card-tagline {
  font-size: 0.8rem;
  color: var(--text-light);
}

.partner-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.partner-promo-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-primary);
  border: 1px dashed var(--border-color);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
}

.partner-promo-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.partner-promo-code {
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.05em;
  background: var(--bg-secondary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  border: 1px solid var(--border-light);
}

.partner-promo-code.masked {
  color: var(--text-light);
  filter: blur(2.5px);
  user-select: none;
  cursor: help;
}

.partner-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.partner-card-actions .btn {
  padding: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ==========================================================================
   📺 ADSENSE BANNER LAYOUT (FREE PLAN MONETIZATION)
   ========================================================================== */
.adsense-banner {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

.ad-placeholder-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  text-align: center;
}

.ad-badge {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--border-light);
  color: var(--text-light);
  font-size: 0.6rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-bottom-right-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.ad-mock-graphics {
  color: var(--text-secondary);
}

.ad-mock-graphics strong {
  font-size: 0.85rem;
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.15rem;
}

.ad-mock-graphics p {
  font-size: 0.75rem;
  margin: 0;
}

.ad-mock-graphics p span {
  color: var(--primary);
  font-weight: 600;
}

/* --- Header Ad Layout --- */
.adsense-header-ad {
  width: 100%;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  border-radius: 0 !important; /* toglie il radius per integrarsi in cima */
  padding: 0.5rem 1rem;
  box-shadow: none !important;
}

.ad-placeholder-content-horizontal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.8rem;
  text-align: center;
}

.ad-placeholder-content-horizontal .ad-badge {
  position: static;
  background: rgba(217, 106, 67, 0.15);
  color: var(--primary);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.4rem;
  font-size: 0.6rem;
}

.ad-mock-graphics-horizontal {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.ad-mock-graphics-horizontal strong {
  color: var(--text-primary);
  font-size: 0.8rem;
}

.ad-mock-graphics-horizontal span {
  font-size: 0.75rem;
}

/* --- Skyscraper Ads Layout --- */
.adsense-skyscraper {
  position: fixed;
  top: 110px;
  width: 140px;
  height: 600px;
  z-index: 90; /* sotto navbar ma sopra il resto */
  background: rgba(251, 250, 247, 0.02) !important;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  box-sizing: border-box;
}

.adsense-skyscraper-left {
  left: 15px;
}

.adsense-skyscraper-right {
  right: 15px;
}

.ad-placeholder-content-vertical {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 1rem;
  box-sizing: border-box;
}

.ad-placeholder-content-vertical .ad-badge {
  top: 0;
  left: 0;
  border-bottom-right-radius: var(--radius-sm);
  background: rgba(217, 106, 67, 0.15);
  color: var(--primary);
}

.ad-mock-graphics-vertical {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  color: var(--text-secondary);
}

.ad-mock-graphics-vertical strong {
  font-size: 0.85rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ad-mock-graphics-vertical p {
  font-size: 0.75rem;
  margin: 0;
  line-height: 1.5;
}

.ad-mock-graphics-vertical p span {
  color: var(--primary);
  font-weight: 600;
}

/* Forza la scomparsa degli Skyscrapers su schermi non desktop per non coprire il layout */
@media (max-width: 1449px) {
  .adsense-skyscraper {
    display: none !important;
  }
}

/* ==========================================================================
   Under Construction Screen Styles
   ========================================================================== */
.under-construction-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #0b0f19;
  color: #e2e8f0;
  z-index: 999999;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: 'Outfit', 'Inter', sans-serif;
  padding: 1.5rem;
  box-sizing: border-box;
}

.uc-content {
  background: rgba(17, 24, 39, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3rem 2.5rem;
  border-radius: 24px;
  max-width: 520px;
  width: 100%;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: ucFadeIn 0.8s ease-out;
}

.uc-logo {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 2px solid #06b6d4; /* Accent color fallback (cyan) */
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
  margin-bottom: 1.5rem;
  object-fit: cover;
}

.uc-content h1 {
  font-size: 2.5rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #f8fafc 30%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.uc-subtitle {
  font-size: 1.15rem;
  font-weight: 600;
  color: #38bdf8; /* light blue */
  margin-bottom: 1.25rem;
}

.uc-description {
  font-size: 0.95rem;
  color: #94a3b8; /* slate-400 */
  line-height: 1.6;
  margin-bottom: 2rem;
}

.uc-loader {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.75rem 1.25rem;
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 2rem;
}

.uc-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(6, 182, 212, 0.2);
  border-top-color: #06b6d4;
  border-radius: 50%;
  animation: ucSpin 1s linear infinite;
}

.uc-loader span {
  font-size: 0.85rem;
  font-weight: 600;
  color: #cbd5e1;
  letter-spacing: 0.02em;
}

.uc-footer {
  font-size: 0.75rem;
  color: #64748b;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  width: 100%;
  padding-top: 1.5rem;
}

@keyframes ucSpin {
  to { transform: rotate(360deg); }
}

@keyframes ucFadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}