/* ============================================
   TubeTrail - Modern Cartographic Journal Theme
   A warm, light, travel-inspired aesthetic
   ============================================ */

:root {
  /* Color Palette - Warm Parchment */
  --bg-primary: #FAF7F2;
  --bg-secondary: #F5F1EA;
  --bg-accent: #E8F0E8;

  --text-primary: #1A1A1A;
  --text-secondary: #5C5C5C;
  --text-tertiary: #8B8B8B;

  --accent-primary: #FF6B5B;    /* Coral pin from app icon */
  --accent-secondary: #FF8066;  /* Warm coral */
  --accent-teal: #2DD4BF;       /* Globe teal from app */

  --border-warm: rgba(139, 109, 76, 0.15);
  --border-strong: rgba(139, 109, 76, 0.25);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max-width: 1080px;

  /* Easing */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================
   Base & Reset
   ============================================ */

* {
  box-sizing: border-box;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  margin: 0;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;

  /* Subtle map grid background */
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 50px,
      rgba(139, 109, 76, 0.03) 50px,
      rgba(139, 109, 76, 0.03) 51px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 50px,
      rgba(139, 109, 76, 0.03) 50px,
      rgba(139, 109, 76, 0.03) 51px
    );
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-optical-sizing: auto;
}

p {
  margin: 0 0 var(--spacing-sm);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s var(--ease-out-expo);
}

img {
  max-width: 100%;
  display: block;
}

/* ============================================
   Layout Utilities
   ============================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ============================================
   Header
   ============================================ */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(250, 247, 242, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-warm);
  padding: var(--spacing-sm) 0;
}

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

.logo a {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  font-style: italic;
}

.logo a:hover {
  color: var(--accent-primary);
}

header nav a {
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  margin-left: var(--spacing-md);
  position: relative;
}

header nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width 0.3s var(--ease-out-expo);
}

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

header nav a:hover::after,
header nav a.active::after {
  width: 100%;
}

/* ============================================
   Hero Section - The Departure Point
   ============================================ */

.hero {
  padding: var(--spacing-xl) 0;
  position: relative;
  overflow: hidden;
}

/* Decorative floating pins */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  background: var(--accent-primary);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  opacity: 0.12;
  animation: float 6s ease-in-out infinite;
}

.hero::before {
  top: 15%;
  left: 8%;
  animation-delay: 0s;
}

.hero::after {
  top: 60%;
  right: 12%;
  width: 18px;
  height: 18px;
  animation-delay: 2s;
}

@keyframes float {
  0%, 100% { transform: rotate(-45deg) translateY(0px); }
  50% { transform: rotate(-45deg) translateY(-12px); }
}

.hero-layout {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex-direction: column;
}

@media (min-width: 768px) {
  .hero-layout {
    flex-direction: row;
  }
}

.hero-text {
  flex: 1;
  text-align: center;
  position: relative;
}

@media (min-width: 768px) {
  .hero-text {
    text-align: left;
  }
}

/* Decorative coordinate */
.hero-text::before {
  content: '48.8566°N, 2.3522°E';
  position: absolute;
  top: -24px;
  left: 0;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (max-width: 767px) {
  .hero-text::before {
    left: 50%;
    transform: translateX(-50%);
  }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  max-width: 480px;
  line-height: 1.8;
}

@media (min-width: 768px) {
  .hero-subtitle {
    margin-left: 0;
    margin-right: 0;
  }
}

@media (max-width: 767px) {
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}

.hero-cta-wrapper {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
}

@media (min-width: 768px) {
  .hero-cta-wrapper {
    align-items: flex-start;
  }
}

.hero-feedback-link {
  margin-top: var(--spacing-sm);
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-bottom: 0;
}

.hero-feedback-link a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-decoration-color: var(--border-warm);
  text-underline-offset: 4px;
  transition: all 0.3s var(--ease-out-expo);
}

.hero-feedback-link a:hover {
  color: var(--accent-primary);
  text-decoration-color: var(--accent-primary);
}

/* Phone Mockup - Light bezel */
.hero-visual {
  position: relative;
}

/* Decorative elements around phone */
.hero-visual::before {
  content: '35.6762°N';
  position: absolute;
  top: 10%;
  right: -60px;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
  transform: rotate(90deg);
  opacity: 0.6;
}

@media (max-width: 767px) {
  .hero-visual::before {
    display: none;
  }
}

.phone-mockup {
  position: relative;
  background: linear-gradient(145deg, #f0f0f0, #d8d8d8);
  border-radius: 44px;
  padding: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow:
    0 25px 50px -12px rgba(0, 0, 0, 0.15),
    0 12px 24px -8px rgba(0, 0, 0, 0.1),
    inset 0 1px 2px rgba(255, 255, 255, 0.9);
  max-width: 280px;
  margin: 0 auto;
  display: grid;
  grid-template-areas: "screen";
}

.app-screen {
  grid-area: screen;
  border-radius: 32px;
  overflow: hidden;
  width: 100%;
  height: auto;
  opacity: 0;
  transition: opacity 1.2s var(--ease-out-expo);
}

.app-screen.active {
  opacity: 1;
  z-index: 1;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s var(--ease-out-expo);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
  box-shadow: 0 4px 14px rgba(255, 107, 91, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 91, 0.4);
  background: var(--accent-secondary);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn-icon {
  font-size: 1.2em;
  margin-right: 8px;
}

/* Secondary button for content pages */
.content-wrapper .btn {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-warm);
}

.content-wrapper .btn:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

/* ============================================
   Section Headers
   ============================================ */

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: var(--spacing-xs);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   Features - Trail/Timeline Layout
   ============================================ */

.features,
.gallery {
  padding: var(--spacing-xl) 0;
}

.features {
  background: var(--bg-secondary);
  position: relative;
}

/* Subtle texture on features section */
.features::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(232, 240, 232, 0.5) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 107, 91, 0.05) 0%, transparent 40%);
  pointer-events: none;
}

.feature-trail {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

/* The trail line */
.feature-trail::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--border-strong) 0,
    var(--border-strong) 8px,
    transparent 8px,
    transparent 16px
  );
  transform: translateX(-50%);
}

@media (max-width: 600px) {
  .feature-trail::before {
    left: 24px;
  }
}

.trail-stop {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  position: relative;
}

/* Alternating layout */
.trail-stop:nth-child(odd) {
  flex-direction: row;
}

.trail-stop:nth-child(even) {
  flex-direction: row-reverse;
}

@media (max-width: 600px) {
  .trail-stop:nth-child(odd),
  .trail-stop:nth-child(even) {
    flex-direction: row;
  }
}

.trail-marker {
  width: 48px;
  height: 48px;
  background: var(--bg-primary);
  border: 2px solid var(--border-strong);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
  transition: all 0.3s var(--ease-out-expo);
}

.trail-stop:hover .trail-marker {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: scale(1.1);
}

.trail-content {
  flex: 1;
  background: var(--bg-primary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-warm);
  max-width: 280px;
  transition: all 0.3s var(--ease-out-expo);
}

.trail-stop:hover .trail-content {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border-color: var(--accent-primary);
}

.trail-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
}

.trail-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.6;
}

/* Fallback grid for legacy feature-grid class */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
}

.feature-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-warm);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-out-expo);
}

.feature-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
}

/* ============================================
   Gallery - Postcards from the Trail
   ============================================ */

.gallery {
  overflow: visible;
}

.postcard-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  perspective: 1000px;
}

.postcard {
  flex: 0 0 280px;
  background: white;
  padding: 12px;
  border-radius: var(--radius-sm);
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.08),
    0 1px 3px rgba(0, 0, 0, 0.06);
  transition: all 0.4s var(--ease-out-expo);
  cursor: pointer;
}

/* Random rotations */
.postcard:nth-child(1) { transform: rotate(-2deg); }
.postcard:nth-child(2) { transform: rotate(1.5deg); }
.postcard:nth-child(3) { transform: rotate(-1deg); }
.postcard:nth-child(4) { transform: rotate(2.5deg); }

.postcard:hover {
  transform: rotate(0deg) translateY(-12px) scale(1.03);
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.12),
    0 8px 16px rgba(0, 0, 0, 0.08);
  z-index: 10;
}

.postcard img {
  border-radius: 4px;
  width: 100%;
}

.postcard-caption {
  text-align: center;
  padding-top: 10px;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
}

/* Legacy gallery-scroll support */
.gallery-scroll {
  display: flex;
  gap: var(--spacing-md);
  overflow-x: auto;
  padding-bottom: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.gallery-item {
  flex: 0 0 280px;
  background: white;
  padding: 12px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.4s var(--ease-out-expo);
}

.gallery-item:nth-child(1) { transform: rotate(-2deg); }
.gallery-item:nth-child(2) { transform: rotate(1.5deg); }
.gallery-item:nth-child(3) { transform: rotate(-1deg); }
.gallery-item:nth-child(4) { transform: rotate(2.5deg); }

.gallery-item:hover {
  transform: rotate(0deg) translateY(-12px) scale(1.03);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
  z-index: 10;
}

.gallery-item img {
  border-radius: 4px;
}

/* ============================================
   Footer - Base Camp
   ============================================ */

footer {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--border-warm);
  margin-top: var(--spacing-lg);
  background: var(--bg-secondary);
  position: relative;
}

footer::before {
  content: 'Base Camp';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  padding: 0 var(--spacing-sm);
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
}

@media (min-width: 600px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.copyright {
  color: var(--text-tertiary);
  font-family: var(--font-ui);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  transition: color 0.3s var(--ease-out-expo);
}

.footer-links a:hover {
  color: var(--accent-primary);
}

/* ============================================
   Content Pages (Support & Privacy)
   ============================================ */

.content-wrapper {
  max-width: 720px;
  margin: var(--spacing-lg) auto;
  padding: 0 var(--spacing-md);
  min-height: 60vh;
}

.content-wrapper h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin-bottom: var(--spacing-md);
  font-family: var(--font-display);
}

.content-wrapper h2 {
  font-size: 1.5rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-family: var(--font-display);
}

.content-wrapper p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.content-wrapper strong {
  color: var(--text-primary);
}

/* FAQ Accordion */
details {
  background: var(--bg-secondary);
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  transition: all 0.3s var(--ease-out-expo);
}

details:hover {
  border-color: var(--accent-primary);
}

details[open] {
  border-color: var(--accent-primary);
}

summary {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  transition: background 0.3s;
}

summary:hover {
  background: rgba(255, 107, 91, 0.05);
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent-primary);
  font-weight: 400;
  transition: transform 0.3s var(--ease-out-expo);
}

details[open] summary::after {
  content: '+';
  transform: rotate(45deg);
}

details p {
  padding: 0 var(--spacing-md) var(--spacing-md);
  margin: 0;
  border-top: 1px solid var(--border-warm);
  padding-top: var(--spacing-sm);
}

/* Tables */
.content-wrapper table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-warm);
  overflow: hidden;
}

.content-wrapper th,
.content-wrapper td {
  padding: var(--spacing-sm);
  text-align: left;
  border-bottom: 1px solid var(--border-warm);
  color: var(--text-secondary);
}

.content-wrapper th {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-primary);
  background: rgba(139, 109, 76, 0.05);
}

.content-wrapper tr:last-child td {
  border-bottom: none;
}

/* Lists */
.content-wrapper ul {
  color: var(--text-secondary);
  padding-left: var(--spacing-md);
}

.content-wrapper li {
  margin-bottom: 0.5rem;
}

.content-wrapper li::marker {
  color: var(--accent-primary);
}

/* ============================================
   Modal Styles
   ============================================ */

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(26, 26, 26, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s var(--ease-out-expo);
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal-content {
  background: var(--bg-primary);
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  width: 90%;
  max-width: 500px;
  position: relative;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.15);
  transform: translateY(20px);
  transition: transform 0.4s var(--ease-out-expo);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px 10px;
  line-height: 1;
  transition: color 0.3s;
}

.modal-close:hover {
  color: var(--accent-primary);
}

.modal-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-display);
  color: var(--text-primary);
}

.modal-message {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

/* Form Styles */
.feedback-form .form-group {
  margin-bottom: var(--spacing-sm);
}

.feedback-form label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-weight: 500;
  font-size: 0.9rem;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-weight: 400 !important;
  cursor: pointer;
  font-size: 0.9rem;
  transition: color 0.3s;
}

.checkbox-label:hover {
  color: var(--text-primary);
}

.checkbox-label input {
  margin-right: 10px;
  accent-color: var(--accent-primary);
}

textarea.form-control,
input.form-control {
  width: 100%;
  box-sizing: border-box;
  background: var(--bg-secondary);
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

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

textarea.form-control:focus,
input.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 91, 0.15);
}

.modal-actions {
  margin-top: var(--spacing-md);
  text-align: right;
}

.success-message {
  display: none;
  text-align: center;
  padding: var(--spacing-md) 0;
}

.success-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
  display: block;
}

/* ============================================
   Responsive Tweaks
   ============================================ */

@media (max-width: 480px) {
  :root {
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
  }

  .postcard,
  .gallery-item {
    flex: 0 0 240px;
  }
}