/* ============================================
   THE FANCY GAP FOG - Dynamic Theme System
   The fog speaks. The fog is always watching.
   ============================================ */

/* ---------- CSS Custom Properties - Base Dark Theme ---------- */
:root {
  /* Typography */
  --font-serif: 'Libre Baskerville', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Font sizes - fluid scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.825rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.375vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.75rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
  --text-5xl: clamp(3rem, 2rem + 3vw, 4.5rem);

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 2.5rem;
  --space-3xl: 3rem;
  --space-4xl: 4rem;
  --space-5xl: 5rem;

  /* Layout */
  --max-width: 72rem;
  --content-width: 42rem;
  --reading-width: 38rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 500ms ease;
  --transition-atmospheric: 1500ms ease;
}

/* ---------- Fog State Colors ---------- */

/* CLEAR state - brighter, high contrast, the fog is resting */
.fog-CLEAR {
  --bg-primary: #1a1f2e;
  --bg-secondary: #242a3d;
  --bg-tertiary: #2e3650;
  --bg-card: #333c55;
  --text-primary: #e8eaf0;
  --text-secondary: #a8b0c5;
  --text-muted: #7a859e;
  --accent-primary: #6bb8ff;
  --accent-secondary: #4a9ee0;
  --accent-glow: rgba(107, 184, 255, 0.15);
  --border-subtle: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.2);
  --fog-overlay: none;
  --animation-speed: 0s;
  --blur-amount: 0px;
}

/* HAZY state - dreamy, soft-focus, the fog is watching */
.fog-HAZY {
  --bg-primary: #14181f;
  --bg-secondary: #1a2028;
  --bg-tertiary: #222833;
  --bg-card: #2a323e;
  --text-primary: #d4dae6;
  --text-secondary: #98a3b8;
  --text-muted: #687590;
  --accent-primary: #8fa8c9;
  --accent-secondary: #6d8bb3;
  --accent-glow: rgba(143, 168, 201, 0.12);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.12);
  --fog-overlay: linear-gradient(180deg, rgba(180, 190, 210, 0.03) 0%, transparent 50%, rgba(180, 190, 210, 0.02) 100%);
  --animation-speed: 8s;
  --blur-amount: 0.5px;
}

/* PATCHY state - unstable, shifting, the fog is playing */
.fog-PATCHY {
  --bg-primary: #0f1318;
  --bg-secondary: #141a20;
  --bg-tertiary: #1a222a;
  --bg-card: #232d38;
  --text-primary: #c8d0de;
  --text-secondary: #8a96ac;
  --text-muted: #5c6a82;
  --accent-primary: #7fa0c4;
  --accent-secondary: #5a82a8;
  --accent-glow: rgba(127, 160, 196, 0.1);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.1);
  --fog-overlay: linear-gradient(180deg, rgba(150, 165, 190, 0.04) 0%, transparent 40%, rgba(150, 165, 190, 0.03) 100%);
  --animation-speed: 4s;
  --blur-amount: 0.8px;
}

/* FOGGY state - maximum darkness, the fog is in control */
.fog-FOGGY {
  --bg-primary: #080a0d;
  --bg-secondary: #0c0f14;
  --bg-tertiary: #10151c;
  --bg-card: #181f28;
  --text-primary: #b8c2d4;
  --text-secondary: #788498;
  --text-muted: #4a5568;
  --accent-primary: #6a8ab0;
  --accent-secondary: #4a6a90;
  --accent-glow: rgba(106, 138, 176, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.04);
  --border-strong: rgba(255, 255, 255, 0.08);
  --fog-overlay: linear-gradient(180deg, rgba(120, 140, 170, 0.06) 0%, transparent 30%, rgba(120, 140, 170, 0.05) 70%, rgba(120, 140, 170, 0.03) 100%);
  --animation-speed: 6s;
  --blur-amount: 1.2px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  transition: background-color var(--transition-atmospheric), color var(--transition-atmospheric);
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--fog-overlay);
  pointer-events: none;
  z-index: 1;
  transition: background var(--transition-atmospheric);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 {
  font-size: var(--text-4xl);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
  max-width: var(--reading-width);
  color: var(--text-secondary);
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-primary);
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 2;
}

.container--narrow {
  max-width: var(--content-width);
}

/* ---------- Header ---------- */
.fog-header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  z-index: 10;
}

.fog-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.fog-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text-primary);
}

.fog-logo__text {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.fog-logo__text span {
  color: var(--accent-primary);
}

.fog-nav {
  display: flex;
  gap: var(--space-xl);
}

.fog-nav__link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-decoration: none;
  padding: var(--space-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.fog-nav__link:hover,
.fog-nav__link--active {
  color: var(--text-primary);
}

.fog-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent-primary);
  transition: width var(--transition-base);
}

.fog-nav__link:hover::after,
.fog-nav__link--active::after {
  width: 100%;
}

/* Mobile menu toggle button */
.fog-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.fog-menu-toggle__bar {
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition-fast);
}

/* Mobile navigation - hidden by default at all viewport sizes */
.fog-mobile-nav {
  display: none;
}

@media (max-width: 768px) {
  .fog-nav {
    display: none;
  }

  .fog-menu-toggle {
    display: flex;
  }

  .fog-mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    z-index: 99;
    padding: var(--space-5xl) var(--space-lg);
  }

  .fog-mobile-nav.is-open {
    display: block;
  }

  .fog-mobile-nav__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .fog-mobile-nav__link {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
  }

  .fog-mobile-nav__link:hover {
    color: var(--accent-primary);
  }
}

/* ---------- Hero Section ---------- */
.fog-hero {
  padding: var(--space-4xl) 0;
  text-align: center;
  position: relative;
  z-index: 2;
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.fog-hero__status {
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-primary);
  margin: 0 auto var(--space-lg);
}

.fog-hero__title {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-md);
  max-width: none;
}

.fog-hero__message {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--text-secondary);
  max-width: 40ch;
  margin: 0 auto var(--space-xl);
  line-height: 1.6;
}

.fog-hero__data {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
  margin-top: var(--space-xl);
}

.fog-hero__stat {
  text-align: center;
}

.fog-hero__stat-value {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  color: var(--text-primary);
  display: block;
}

.fog-hero__stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ---------- Fog States Animation ---------- */

/* FOGGY - Slow pulsing on status text */
.fog-FOGGY .fog-hero__status {
  animation: fogPulse var(--animation-speed) ease-in-out infinite;
}

@keyframes fogPulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

/* FOGGY - Text emerges slowly */
.fog-FOGGY .fog-hero__message {
  animation: fogEmerge 3s ease-out;
}

@keyframes fogEmerge {
  0% { opacity: 0; filter: blur(4px); transform: translateY(10px); }
  100% { opacity: 1; filter: blur(0); transform: translateY(0); }
}

/* PATCHY - Subtle flicker */
.fog-PATCHY .fog-hero__title {
  animation: patchyFlicker var(--animation-speed) ease-in-out infinite;
}

@keyframes patchyFlicker {
  0%, 90%, 100% { opacity: 1; }
  92%, 94% { opacity: 0.85; }
  96% { opacity: 0.95; }
}

/* PATCHY - Elements fade slightly */
.fog-PATCHY .fog-hero__message {
  animation: patchyFade var(--animation-speed) ease-in-out infinite;
}

@keyframes patchyFade {
  0%, 100% { opacity: 0.9; }
  50% { opacity: 1; }
}

/* HAZY - Gentle sway */
.fog-HAZY .fog-hero__message {
  animation: hazyDrift var(--animation-speed) ease-in-out infinite;
}

@keyframes hazyDrift {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(3px); }
}

/* CLEAR - No animations, crisp */
.fog-CLEAR .fog-hero__title,
.fog-CLEAR .fog-hero__message,
.fog-CLEAR .fog-hero__status {
  animation: none;
}

/* ---------- Data Cards ---------- */
.fog-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-2xl) 0;
  position: relative;
  z-index: 2;
}

.fog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.fog-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.fog-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.fog-card__title {
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 0;
}

.fog-card__icon {
  font-size: var(--text-xl);
}

.fog-card__value {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.fog-card__detail {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ---------- Wind Page Specific ---------- */
.wind-display {
  text-align: center;
  padding: var(--space-3xl) 0;
  position: relative;
  z-index: 2;
}

.wind-display__compass {
  width: 200px;
  height: 200px;
  margin: 0 auto var(--space-xl);
  border: 2px solid var(--border-strong);
  border-radius: 50%;
  position: relative;
  background: var(--bg-secondary);
}

.wind-display__arrow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 80px;
  background: linear-gradient(to top, transparent 0%, var(--accent-primary) 50%, var(--text-primary) 100%);
  transform-origin: bottom center;
  transform: translate(-50%, -100%) rotate(0deg);
  transition: transform 1s ease-out;
}

.wind-display__center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  background: var(--accent-primary);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.wind-display__labels {
  position: absolute;
  inset: 0;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.wind-display__label {
  position: absolute;
  transform: translate(-50%, -50%);
}

.wind-display__label--n { top: 8px; left: 50%; }
.wind-display__label--s { bottom: 8px; left: 50%; top: auto; }
.wind-display__label--e { right: 8px; top: 50%; left: auto; }
.wind-display__label--w { left: 8px; top: 50%; }

.wind-display__speed {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.wind-display__gust {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

.wind-display__direction {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* ---------- Station Page Specific ---------- */
.station-info {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  padding: var(--space-xl);
  margin: var(--space-2xl) 0;
  position: relative;
  z-index: 2;
}

.station-info__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
}

.station-info__icon {
  font-size: var(--text-3xl);
}

.station-info__title {
  font-size: var(--text-xl);
  margin: 0;
}

.station-info__subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.station-info__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.station-info__item {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.station-info__label {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.station-info__value {
  color: var(--text-primary);
  font-family: var(--font-serif);
}

/* ---------- Footer ---------- */
.fog-footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border-subtle);
  margin-top: var(--space-3xl);
  position: relative;
  z-index: 2;
}

.fog-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
}

.fog-footer__brand {
  font-family: var(--font-serif);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.fog-footer__links {
  display: flex;
  gap: var(--space-lg);
}

.fog-footer__link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.fog-footer__link:hover {
  color: var(--accent-primary);
}

.fog-footer__copy {
  font-size: var(--text-xs);
  color: var(--text-muted);
  max-width: none;
}

/* ---------- Loading State ---------- */
.fog-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
  position: relative;
  z-index: 2;
}

.fog-loading__spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-lg);
}

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

.fog-loading__text {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-secondary);
}

/* ---------- Utility Classes ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ---------- Back Link ---------- */
.fog-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: var(--space-lg);
  transition: color var(--transition-fast);
}

.fog-back:hover {
  color: var(--accent-primary);
}