/* ============================================
   YUN TEA HOUSE — Global Styles
   ============================================ */

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

/* --- CSS Custom Properties --- */
:root {
  /* Spacing (8px grid) */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-7: 56px;
  --space-8: 64px;
  --space-10: 80px;
  --space-12: 96px;
  --space-16: 128px;

  /* Typography */
  --font-display: 'Dongle', sans-serif;
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3.5rem;
  --text-5xl: 4.5rem;
  --text-6xl: 5.5rem;
  --text-hero: clamp(4.5rem, 12vw, 11rem);

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 40px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-theme: 0.4s ease;
}

/* --- Light Theme (Default) --- */
[data-theme="light"] {
  --color-bg: #FAFAF8;
  --color-bg-alt: #F3F2EE;
  --color-bg-card: #FFFFFF;
  --color-bg-nav: rgba(18, 18, 16, 0.94);
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #4A4A45;
  --color-text-muted: #8A8880;
  --color-text-on-dark: #FAFAF8;
  --color-accent: #5C5C30;
  --color-accent-hover: #6E6E3A;
  --color-accent-gold: #C9A94E;
  --color-brown-deep: #2C1F1A;
  --color-cream: #FAF7F0;
  --color-cream-dark: #EDE9E0;
  --color-border: rgba(0, 0, 0, 0.06);
  --color-border-strong: rgba(0, 0, 0, 0.12);
  --color-overlay: rgba(0, 0, 0, 0.4);
  --color-shadow: rgba(0, 0, 0, 0.05);
  --color-section-alt: #F5F4F0;
  --color-hero-text: #FAFAF8;
  --btn-outline-border: #1A1A1A;
  --btn-outline-text: #1A1A1A;
  --btn-outline-hover-bg: #1A1A1A;
  --btn-outline-hover-text: #FAFAF8;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  --color-bg: #0E0E0C;
  --color-bg-alt: #161614;
  --color-bg-card: #1E1E1C;
  --color-bg-nav: rgba(14, 14, 12, 0.96);
  --color-text-primary: #ECECEA;
  --color-text-secondary: #A8A8A2;
  --color-text-muted: #6E6E68;
  --color-text-on-dark: #ECECEA;
  --color-accent: #8B8B4C;
  --color-accent-hover: #9D9D58;
  --color-accent-gold: #D4B85A;
  --color-brown-deep: #D7CCC8;
  --color-cream: #1E1E1C;
  --color-cream-dark: #141412;
  --color-border: rgba(255, 255, 255, 0.07);
  --color-border-strong: rgba(255, 255, 255, 0.12);
  --color-overlay: rgba(0, 0, 0, 0.6);
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-section-alt: #131312;
  --color-hero-text: #ECECEA;
  --btn-outline-border: #A8A8A2;
  --btn-outline-text: #A8A8A2;
  --btn-outline-hover-bg: #ECECEA;
  --btn-outline-hover-text: #0E0E0C;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  transition: background-color var(--transition-theme), color var(--transition-theme);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  text-transform: lowercase;
}

h1 { font-size: var(--text-6xl); }
h2 { font-size: 4rem; }
h3 { font-size: 3rem; }
h4 { font-size: 2rem; }

p {
  color: var(--color-text-secondary);
  max-width: 65ch;
}

.subtitle {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* --- Navigation --- */
.site-nav {
  position: fixed;
  top: var(--space-3);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: auto;
  max-width: 820px;
}

.nav-container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-1) var(--space-1) var(--space-1);
  box-shadow: 0 4px 24px var(--color-shadow);
  border: 1px solid var(--color-border);
}

/* Logo animation in nav */
.nav-logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  border-radius: 50%;
  overflow: hidden;
  margin-left: 2px;
}

.nav-logo-canvas {
  display: block;
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.nav-logo-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
  margin: 0 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-on-dark);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  opacity: 0.85;
}

.nav-links a:hover,
.nav-links a.active {
  opacity: 1;
  background: rgba(255, 255, 255, 0.1);
}

.nav-more {
  position: relative;
}

.nav-more-btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-on-dark);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 4px;
  opacity: 0.85;
  transition: background var(--transition-fast), opacity var(--transition-fast);
}

.nav-more-btn:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.1);
}

.nav-more-btn svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-more.open .nav-more-btn svg {
  transform: rotate(180deg);
}

.nav-more-dropdown {
  position: absolute;
  top: calc(100% + var(--space-1));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  padding: var(--space-1);
  min-width: 160px;
  box-shadow: 0 8px 32px var(--color-shadow);
  border: 1px solid var(--color-border);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.nav-more.open .nav-more-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-more-dropdown a {
  display: block;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-sm);
  opacity: 0.85;
  transition: background var(--transition-fast), opacity var(--transition-fast);
}

.nav-more-dropdown a:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.1);
}

.nav-order-btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-cream);
  background: var(--color-accent);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.nav-order-btn:hover {
  background: var(--color-accent-hover);
  transform: scale(1.03);
}

/* Theme toggle in nav */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-text-on-dark);
  opacity: 0.7;
  transition: opacity var(--transition-fast), background var(--transition-fast);
}

.theme-toggle:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.1);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-moon,
[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: none;
}

/* Mobile hamburger */
.nav-mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--color-text-on-dark);
}

.nav-mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: background var(--transition-fast);
}

.nav-mobile-toggle span::before,
.nav-mobile-toggle span::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: currentColor;
  left: 0;
  transition: transform var(--transition-fast);
}

.nav-mobile-toggle span::before { transform: translateY(-6px); }
.nav-mobile-toggle span::after { transform: translateY(6px); }

.nav-mobile-toggle.open span { background: transparent; }
.nav-mobile-toggle.open span::before { transform: rotate(45deg); }
.nav-mobile-toggle.open span::after { transform: rotate(-45deg); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 10px var(--space-3);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-text-primary);
  color: var(--color-bg);
  border: 1.5px solid var(--color-text-primary);
}

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--btn-outline-text);
  border: 1.5px solid var(--btn-outline-border);
}

.btn-outline:hover {
  background: var(--btn-outline-hover-bg);
  color: var(--btn-outline-hover-text);
  transform: translateY(-1px);
}

.btn-lg {
  font-size: var(--text-sm);
  padding: 12px var(--space-4);
}

/* --- Sections --- */
.section {
  padding: var(--space-12) var(--space-3);
}

.section-alt {
  background: var(--color-section-alt);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.section-header .subtitle {
  margin-bottom: var(--space-2);
  display: block;
}

.section-header h2 {
  margin-bottom: var(--space-3);
}

.section-header p {
  margin: 0 auto;
  font-size: var(--text-lg);
  line-height: 1.75;
}

/* --- Footer --- */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) var(--space-3) var(--space-4);
  transition: background var(--transition-theme), border-color var(--transition-theme);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-6);
}

.footer-brand h3 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  margin-bottom: var(--space-2);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

.footer-col a {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: 4px 0;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  max-width: 1200px;
  margin: var(--space-6) auto 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-social {
  display: flex;
  gap: var(--space-2);
}

.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(107, 107, 60, 0.08);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  h1 { font-size: var(--text-5xl); }
  h2 { font-size: 3.25rem; }
  h3 { font-size: 2.5rem; }

  .section {
    padding: var(--space-8) var(--space-2);
  }

  /* Nav mobile */
  .site-nav {
    top: var(--space-2);
    left: var(--space-2);
    right: var(--space-2);
    transform: none;
    max-width: none;
  }

  .nav-container {
    flex-wrap: wrap;
    gap: var(--space-1);
  }

  .nav-logo-link {
    margin-left: 0;
  }

  .nav-logo-divider {
    display: none;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: var(--space-2) 0;
    gap: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: var(--space-2) var(--space-3);
  }

  .nav-more {
    display: none;
  }

  .nav-links.open ~ .nav-more {
    display: block;
  }

  .nav-mobile-toggle {
    display: flex;
  }

  .nav-order-btn {
    margin-left: auto;
  }

  /* Footer */
  .footer-container {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
}

@media (max-width: 480px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: 2.5rem; }

  .section {
    padding: var(--space-6) var(--space-2);
  }
}

/* --- Hero Background (used on story, visit, and other inner pages) --- */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.25) 0%,
    rgba(0, 0, 0, 0.1) 40%,
    rgba(0, 0, 0, 0.45) 100%
  );
  z-index: 1;
}