/* ============================================
   AQUARIUM PLANNER - Design System
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Ocean Color Palette */
  --color-ocean-deep: #0a1628;
  --color-ocean-dark: #0f2847;
  --color-ocean-mid: #1a4a6e;
  --color-ocean-light: #2d7a9c;
  --color-ocean-surface: #4db8d6;

  /* Accent Colors */
  --color-coral: #ff6b6b;
  --color-coral-light: #ff8787;
  --color-coral-dark: #e85555;
  --color-gold: #ffd93d;
  --color-gold-light: #ffe066;
  --color-seafoam: #6bcb77;
  --color-seafoam-light: #8dd594;
  --color-purple: #9b5de5;
  --color-purple-light: #b47eed;

  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-100: #f8fafc;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;

  /* Status Colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  /* Gradients */
  --gradient-ocean: linear-gradient(135deg, var(--color-ocean-deep) 0%, var(--color-ocean-dark) 50%, var(--color-ocean-mid) 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  --gradient-coral: linear-gradient(135deg, var(--color-coral) 0%, var(--color-coral-dark) 100%);
  --gradient-success: linear-gradient(135deg, var(--color-seafoam) 0%, #4ade80 100%);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(77, 184, 214, 0.3);
  --shadow-glow-coral: 0 0 20px rgba(255, 107, 107, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-blur: blur(12px);
}

/* ============================================
   Theme: Coral Reef
   ============================================ */
[data-theme="coral"] {
  --color-ocean-deep: #1a0a28;
  --color-ocean-dark: #2d1547;
  --color-ocean-mid: #5c2d6e;
  --color-ocean-light: #8d4a9c;
  --color-ocean-surface: #c77dff;
  --color-coral: #ff4757;
  --color-coral-light: #ff6b7a;
  --color-coral-dark: #e83e4d;
  --color-gold: #ffcc00;
  --color-gold-light: #ffdb33;
  --color-seafoam: #2ed573;
  --color-seafoam-light: #4ade80;
  --gradient-ocean: linear-gradient(135deg, #1a0a28 0%, #2d1547 50%, #5c2d6e 100%);
  --shadow-glow: 0 0 20px rgba(199, 125, 255, 0.3);
  --shadow-glow-coral: 0 0 20px rgba(255, 71, 87, 0.3);
}

/* ============================================
   Theme: Planted Tank
   ============================================ */
[data-theme="planted"] {
  --color-ocean-deep: #0a1a12;
  --color-ocean-dark: #0f2d1f;
  --color-ocean-mid: #1a4a2e;
  --color-ocean-light: #2d7a4c;
  --color-ocean-surface: #4ddb7e;
  --color-coral: #2ed573;
  --color-coral-light: #4ade80;
  --color-coral-dark: #26b863;
  --color-gold: #ffd93d;
  --color-gold-light: #ffe066;
  --color-seafoam: #4db8d6;
  --color-seafoam-light: #6bcbd7;
  --gradient-ocean: linear-gradient(135deg, #0a1a12 0%, #0f2d1f 50%, #1a4a2e 100%);
  --gradient-coral: linear-gradient(135deg, #2ed573 0%, #26b863 100%);
  --shadow-glow: 0 0 20px rgba(77, 219, 126, 0.3);
  --shadow-glow-coral: 0 0 20px rgba(46, 213, 115, 0.3);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-white);
  background: var(--gradient-ocean);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated Background Bubbles */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(77, 184, 214, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(155, 93, 229, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(107, 203, 119, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ============================================
   Typography
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-ocean-surface) 0%, var(--color-seafoam) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   Layout Components
   ============================================ */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.app-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding: var(--space-6) 0;
}

@media (min-width: 1024px) {
  .app-layout {
    grid-template-columns: 320px 1fr 380px;
  }
}

/* ============================================
   Mobile Navigation Bar
   ============================================ */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--glass-border);
  padding: var(--space-2) var(--space-4);
  z-index: 1000;
  justify-content: space-around;
}

@media (max-width: 1023px) {
  .mobile-nav {
    display: flex;
  }

  body {
    padding-bottom: 80px;
  }

  /* View switching on mobile */
  .tank-config,
  .tank-panel {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 80px;
    max-height: none;
    overflow-y: auto;
    z-index: 50;
    border-radius: 0;
    margin: 0;
    padding: var(--space-4);
  }

  .tank-config.mobile-active,
  .tank-panel.mobile-active {
    display: block;
  }

  .species-browser {
    display: block;
  }

  .species-browser.mobile-hidden {
    display: none;
  }

  .app-layout {
    display: block;
    padding-bottom: 0;
  }

  .header {
    position: sticky;
    top: 0;
  }
}

.mobile-nav__btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: transparent;
  border: none;
  color: var(--color-gray-400);
  font-family: var(--font-family);
  cursor: pointer;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  position: relative;
}

.mobile-nav__btn:hover,
.mobile-nav__btn.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.mobile-nav__btn.active {
  color: var(--color-ocean-surface);
}

.mobile-nav__icon {
  font-size: 1.5rem;
}

.mobile-nav__label {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.mobile-nav__badge {
  position: absolute;
  top: 2px;
  right: 8px;
  background: var(--color-coral);
  color: white;
  font-size: 10px;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.mobile-nav__badge:empty,
.mobile-nav__badge[data-count="0"] {
  display: none;
}

/* ============================================
   Glass Card Component
   ============================================ */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-glow);
}

.glass-card--solid {
  background: rgba(15, 40, 71, 0.8);
}

/* ============================================
   Header
   ============================================ */
.header {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__logo-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-coral);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  box-shadow: var(--shadow-glow-coral);
}

.header__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.header__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

/* ============================================
   Tank Configuration Panel
   ============================================ */
.tank-config {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 130px);
  overflow-y: auto;
}

.tank-config__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-lg);
}

.tank-config__title-icon {
  font-size: var(--font-size-xl);
}

/* Tank Size Selector */
.tank-sizes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.tank-size-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  color: var(--color-white);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.tank-size-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-ocean-surface);
}

.tank-size-btn.active {
  background: var(--color-ocean-surface);
  border-color: var(--color-ocean-surface);
  box-shadow: var(--shadow-glow);
}

.tank-size-btn__gallons {
  font-size: var(--font-size-lg);
  font-weight: 700;
  display: block;
}

.tank-size-btn__label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

.tank-size-btn.active .tank-size-btn__label {
  color: rgba(255, 255, 255, 0.8);
}

/* Custom Tank Size */
.custom-tank {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.custom-tank__input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  color: var(--color-white);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
}

.custom-tank__input:focus {
  outline: none;
  border-color: var(--color-ocean-surface);
  box-shadow: 0 0 0 3px rgba(77, 184, 214, 0.2);
}

.custom-tank__input::placeholder {
  color: var(--color-gray-500);
}

/* Tank Dimensions */
.tank-dimensions {
  margin-bottom: var(--space-6);
}

.tank-dimensions__details {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.tank-dimensions__summary {
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

.tank-dimensions__summary:hover {
  color: var(--color-white);
}

.tank-dimensions__summary::marker {
  color: var(--color-ocean-surface);
}

.tank-dimensions__inputs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  padding-top: 0;
}

.tank-dimensions__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.tank-dimensions__label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  font-weight: 500;
}

.tank-dimensions__input {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  color: var(--color-white);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  width: 100%;
}

.tank-dimensions__input:focus {
  outline: none;
  border-color: var(--color-ocean-surface);
  box-shadow: 0 0 0 2px rgba(77, 184, 214, 0.2);
}

.tank-dimensions__input::placeholder {
  color: var(--color-gray-500);
}

.tank-dimensions__calc {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--glass-border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.tank-dimensions__result {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tank-dimensions__result-label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

.tank-dimensions__result-value {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-ocean-surface);
}

/* Bioload Meter */
.bioload-meter {
  margin-bottom: var(--space-6);
}

.bioload-meter__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.bioload-meter__label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-300);
}

.bioload-meter__value {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.bioload-meter__bar {
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.bioload-meter__fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  background: var(--gradient-success);
}

.bioload-meter__fill.warning {
  background: linear-gradient(90deg, var(--color-warning), #fb923c);
}

.bioload-meter__fill.danger {
  background: linear-gradient(90deg, var(--color-danger), #f87171);
  animation: pulse-danger 1s ease-in-out infinite;
}

@keyframes pulse-danger {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

/* ============================================
   Species Browser
   ============================================ */
.species-browser {
  min-height: 600px;
}

.species-browser__header {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.search-box {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-box__icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-500);
  pointer-events: none;
}

.search-box__input {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
  color: var(--color-white);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
}

.search-box__input:focus {
  outline: none;
  border-color: var(--color-ocean-surface);
  box-shadow: 0 0 0 3px rgba(77, 184, 214, 0.2);
}

.search-box__input::placeholder {
  color: var(--color-gray-500);
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: var(--space-2);
}

.filter-tab {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  color: var(--color-gray-300);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.filter-tab:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

.filter-tab.active {
  background: var(--color-ocean-surface);
  border-color: var(--color-ocean-surface);
  color: var(--color-white);
}

.filter-tab__icon {
  font-size: var(--font-size-base);
}

/* Species Grid */
.species-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

/* No Results State */
.species-grid__empty {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  color: var(--color-gray-400);
}

.species-grid__empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.species-grid__empty-text {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

.species-grid__empty-hint {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* Card Fade-in Animation */
@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.species-card {
  animation: cardFadeIn 0.3s ease both;
}

.species-card:nth-child(1) { animation-delay: 0s; }
.species-card:nth-child(2) { animation-delay: 0.03s; }
.species-card:nth-child(3) { animation-delay: 0.06s; }
.species-card:nth-child(4) { animation-delay: 0.09s; }
.species-card:nth-child(5) { animation-delay: 0.12s; }
.species-card:nth-child(6) { animation-delay: 0.15s; }
.species-card:nth-child(7) { animation-delay: 0.18s; }
.species-card:nth-child(8) { animation-delay: 0.21s; }
.species-card:nth-child(9) { animation-delay: 0.24s; }
.species-card:nth-child(10) { animation-delay: 0.27s; }

/* Species Card */
.species-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.species-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-coral);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.species-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
}

.species-card:hover::before {
  opacity: 1;
}

.species-card.in-tank::before {
  opacity: 1;
  background: var(--gradient-success);
}

.species-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.species-card__icon {
  font-size: var(--font-size-3xl);
  line-height: 1;
}

.species-card__type-badge {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.species-card__type-badge.fish {
  color: var(--color-ocean-surface);
}

.species-card__type-badge.snail {
  color: var(--color-gold);
}

.species-card__type-badge.shrimp {
  color: var(--color-coral-light);
}

.species-card__type-badge.plant {
  color: var(--color-seafoam);
}

.species-card__name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.species-card__scientific {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  font-style: italic;
  margin-bottom: var(--space-3);
}

.species-card__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.species-card__stat {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.species-card__stat-icon {
  font-size: var(--font-size-sm);
}

/* Add Button */
.species-card__add-btn {
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  background: var(--gradient-coral);
  border: none;
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--font-size-xl);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-glow-coral);
}

.species-card:hover .species-card__add-btn {
  opacity: 1;
  transform: scale(1);
}

.species-card__add-btn:hover {
  transform: scale(1.1);
}

/* ============================================
   Tank Panel (Right Side)
   ============================================ */
.tank-panel {
  position: sticky;
  top: 100px;
  height: fit-content;
  max-height: calc(100vh - 130px);
  overflow-y: auto;
}

.tank-panel__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.tank-panel__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-lg);
}

.tank-panel__count {
  background: var(--color-ocean-surface);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* Stock List */
.stock-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.stock-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: all var(--transition-fast);
}

.stock-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.stock-item.has-warning {
  border-color: var(--color-warning);
  background: rgba(245, 158, 11, 0.1);
}

.stock-item.has-error {
  border-color: var(--color-danger);
  background: rgba(239, 68, 68, 0.1);
}

.stock-item__icon {
  font-size: var(--font-size-2xl);
}

.stock-item__info {
  flex: 1;
}

.stock-item__name {
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.stock-item__meta {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

.stock-item__quantity {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.stock-item__qty-btn {
  width: 28px;
  height: 28px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: var(--font-size-base);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.stock-item__qty-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.stock-item__qty-btn--remove:hover {
  background: var(--color-danger);
}

.stock-item__qty-value {
  font-weight: 600;
  min-width: 24px;
  text-align: center;
}

/* Empty State */
.empty-tank {
  text-align: center;
  padding: var(--space-10);
  color: var(--color-gray-400);
}

.empty-tank__icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-tank__text {
  font-size: var(--font-size-base);
}

/* ============================================
   Warnings Panel
   ============================================ */
.warnings-panel {
  margin-top: var(--space-6);
}

.warnings-panel__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-warning);
}

.warnings-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.warning-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.warning-item.warning {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--color-gold-light);
}

.warning-item.error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--color-coral-light);
}

.warning-item.info {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
}

.warning-item__icon {
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.warning-item__content {
  flex: 1;
}

.warning-item__title {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.warning-item__description {
  opacity: 0.9;
  font-size: var(--font-size-xs);
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-ocean-dark);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--space-6);
  border-bottom: 1px solid var(--glass-border);
}

.modal__icon {
  font-size: 4rem;
  margin-bottom: var(--space-2);
}

.modal__title {
  font-size: var(--font-size-2xl);
}

.modal__scientific {
  font-size: var(--font-size-base);
  color: var(--color-gray-400);
  font-style: italic;
}

.modal__close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  color: var(--color-white);
  font-size: var(--font-size-xl);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal__close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal__body {
  padding: var(--space-6);
}

.modal__section {
  margin-bottom: var(--space-6);
}

.modal__section:last-child {
  margin-bottom: 0;
}

.modal__section-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.modal__stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.modal__stat {
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-3);
  border-radius: var(--radius-md);
}

.modal__stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  margin-bottom: var(--space-1);
}

.modal__stat-value {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.modal__footer {
  padding: var(--space-6);
  border-top: 1px solid var(--glass-border);
  display: flex;
  gap: var(--space-3);
}

/* Modal Image Container */
.modal__image-container {
  width: 100%;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
  position: relative;
}

.modal__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.modal__image-placeholder {
  width: 100%;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
}

.modal__image-credit {
  position: absolute;
  bottom: var(--space-2);
  right: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  background: rgba(0, 0, 0, 0.6);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

/* Scrollable Image Gallery */
.modal__gallery-container {
  width: 100%;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
  position: relative;
}

.modal__gallery-scroll {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-2);
}

/* Custom scrollbar for gallery */
.modal__gallery-scroll::-webkit-scrollbar {
  height: 8px;
}

.modal__gallery-scroll::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
}

.modal__gallery-scroll::-webkit-scrollbar-thumb {
  background: var(--color-ocean-surface);
  border-radius: var(--radius-full);
}

.modal__gallery-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--color-ocean-light);
}

.modal__gallery-image {
  flex-shrink: 0;
  width: 280px;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-md);
  scroll-snap-align: start;
  transition: transform var(--transition-fast);
  cursor: pointer;
}

.modal__gallery-image:hover {
  transform: scale(1.02);
}

.modal__gallery-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.4), transparent);
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  pointer-events: none;
}

.modal__gallery-hint-icon {
  animation: swipeHint 1.5s ease-in-out infinite;
}

@keyframes swipeHint {

  0%,
  100% {
    transform: translateX(0);
  }

  50% {
    transform: translateX(10px);
  }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: none;
}

.btn--primary {
  background: var(--gradient-coral);
  color: var(--color-white);
  box-shadow: var(--shadow-glow-coral);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(255, 107, 107, 0.4);
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border: 1px solid var(--glass-border);
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn--success {
  background: var(--gradient-success);
  color: var(--color-white);
}

.btn--block {
  width: 100%;
}

/* ============================================
   Badges
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.badge--peaceful {
  background: rgba(34, 197, 94, 0.2);
  color: var(--color-success);
}

.badge--semi-aggressive {
  background: rgba(245, 158, 11, 0.2);
  color: var(--color-warning);
}

.badge--aggressive {
  background: rgba(239, 68, 68, 0.2);
  color: var(--color-danger);
}

.badge--beginner {
  background: rgba(34, 197, 94, 0.2);
  color: var(--color-success);
}

.badge--intermediate {
  background: rgba(245, 158, 11, 0.2);
  color: var(--color-warning);
}

.badge--advanced {
  background: rgba(239, 68, 68, 0.2);
  color: var(--color-danger);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1023px) {

  .tank-config,
  .tank-panel {
    position: relative;
    top: 0;
  }

  .app-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .header__subtitle {
    display: none;
  }

  .tank-sizes {
    grid-template-columns: repeat(2, 1fr);
  }

  .filter-tabs {
    flex-wrap: wrap;
  }

  .species-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ============================================
   Utility Classes
   ============================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-danger {
  color: var(--color-danger);
}

/* ============================================
   Visual Tank Display
   ============================================ */
.visual-tank {
  margin-bottom: var(--space-6);
  position: relative;
}

.visual-tank__container {
  background: linear-gradient(180deg,
      rgba(77, 184, 214, 0.1) 0%,
      rgba(26, 74, 110, 0.4) 30%,
      rgba(15, 40, 71, 0.6) 100%);
  border: 3px solid rgba(77, 184, 214, 0.4);
  border-radius: var(--radius-lg);
  min-height: 200px;
  position: relative;
  overflow: hidden;
  box-shadow:
    inset 0 0 60px rgba(0, 0, 0, 0.3),
    0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Water effect */
.visual-tank__container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, transparent 20%);
  pointer-events: none;
}

/* Bubbles animation */
.visual-tank__container::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.3) 1px, transparent 1px),
    radial-gradient(circle, rgba(255, 255, 255, 0.2) 1px, transparent 1px),
    radial-gradient(circle, rgba(255, 255, 255, 0.15) 2px, transparent 2px);
  background-size: 40px 80px, 60px 100px, 80px 120px;
  background-position: 0 0, 20px 40px, 40px 20px;
  animation: bubbleRise 8s linear infinite;
  opacity: 0.6;
  pointer-events: none;
}

@keyframes bubbleRise {
  0% {
    transform: translateY(0);
  }

  100% {
    transform: translateY(-100%);
  }
}

/* Gravel at bottom */
.visual-tank__gravel {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 25px;
  background: linear-gradient(180deg,
      rgba(139, 119, 101, 0.6) 0%,
      rgba(101, 84, 67, 0.8) 100%);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* Species in tank */
.visual-tank__species {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-4);
  padding-bottom: 35px;
  min-height: 175px;
  align-content: flex-start;
}

.visual-tank__creature {
  font-size: 1.8rem;
  animation: swim 3s ease-in-out infinite;
  cursor: pointer;
  transition: transform 0.2s;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.visual-tank__creature:hover {
  transform: scale(1.3);
  z-index: 10;
}

/* Stagger swimming animations */
.visual-tank__creature:nth-child(odd) {
  animation-delay: -1s;
  animation-direction: alternate-reverse;
}

.visual-tank__creature:nth-child(3n) {
  animation-duration: 4s;
}

.visual-tank__creature:nth-child(5n) {
  animation-duration: 2.5s;
}

@keyframes swim {

  0%,
  100% {
    transform: translateX(0) translateY(0);
  }

  25% {
    transform: translateX(5px) translateY(-3px);
  }

  50% {
    transform: translateX(0) translateY(-5px);
  }

  75% {
    transform: translateX(-5px) translateY(-2px);
  }
}

/* Tank info overlay */
.visual-tank__info {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--color-gray-300);
}

/* ============================================
   Species Image in Modal
   ============================================ */
.modal__image-container {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.5));
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-4);
  position: relative;
}

.modal__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.modal__image:hover {
  transform: scale(1.05);
}

.modal__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  background: linear-gradient(135deg,
      rgba(77, 184, 214, 0.2),
      rgba(26, 74, 110, 0.3));
}

.modal__image-credit {
  position: absolute;
  bottom: var(--space-2);
  right: var(--space-2);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.6);
  background: rgba(0, 0, 0, 0.5);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* ============================================
   Pest Badge
   ============================================ */
.badge--pest {
  background: rgba(239, 68, 68, 0.3);
  color: var(--color-coral-light);
  border: 1px solid rgba(239, 68, 68, 0.5);
}

.species-card__pest-warning {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: var(--color-danger);
  color: white;
  font-size: var(--font-size-xs);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* ============================================
   Care Recommendations Panel
   ============================================ */
.care-recommendations {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--glass-border);
}

.care-recommendations__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.care-recommendations__title span {
  font-size: var(--font-size-lg);
}

.care-recommendations__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.care-rec-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.care-rec-item__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.care-rec-item__icon {
  font-size: var(--font-size-lg);
}

.care-rec-item__title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-white);
}

.care-rec-item__value {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-ocean-surface);
  margin-bottom: var(--space-1);
}

.care-rec-item__details {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  line-height: 1.4;
}

.care-rec-item--highlight {
  border-color: var(--color-ocean-surface);
  background: rgba(77, 184, 214, 0.1);
}

.care-rec-item--warning {
  border-color: var(--color-warning);
  background: rgba(245, 158, 11, 0.1);
}

.care-rec-item--warning .care-rec-item__value {
  color: var(--color-warning);
}

/* ============================================
   Header Settings Button
   ============================================ */
.header__settings-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.header__settings-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(45deg);
}

/* ============================================
   Settings Modal
   ============================================ */
.settings-modal {
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
}

.settings-section {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--glass-border);
}

.settings-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.settings-section__title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.settings-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.settings-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-300);
}

.settings-toggle-group {
  display: flex;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 2px;
}

.settings-toggle {
  background: transparent;
  border: none;
  color: var(--color-gray-400);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.settings-toggle:hover {
  color: var(--color-white);
}

.settings-toggle.active {
  background: var(--color-ocean-surface);
  color: var(--color-white);
}

.settings-buttons {
  display: flex;
  gap: var(--space-2);
}

.btn--sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
}

.btn--danger {
  background: rgba(239, 68, 68, 0.2);
  color: var(--color-coral-light);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn--danger:hover {
  background: var(--color-danger);
  color: white;
}

/* Version Log */
.version-log {
  max-height: 250px;
  overflow-y: auto;
}

.version-entry {
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.version-entry--current {
  background: rgba(77, 184, 214, 0.1);
  border: 1px solid rgba(77, 184, 214, 0.2);
}

.version-badge {
  display: inline-block;
  background: var(--color-ocean-surface);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-right: var(--space-2);
}

.version-entry:not(.version-entry--current) .version-badge {
  background: rgba(255, 255, 255, 0.2);
}

.version-date {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

.version-changes {
  margin-top: var(--space-2);
  padding-left: var(--space-4);
  list-style: disc;
}

.version-changes li {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  margin-bottom: 2px;
}

.settings-footer-text {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  text-align: center;
}