/* ============================================================
   禪柔瑜伽健身中心 - Theme CSS
   Forest-inspired pale-green palette | Bootstrap 5.3 | zh-HK
   DIALS: VARIANCE=6, MOTION=5, DENSITY=3
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Light theme - Forest pale-green */
  --color-bg-primary: #f4f7f2;
  --color-bg-secondary: #e8efe4;
  --color-accent: #3d6b4f;
  --color-accent-hover: #2d4f3a;
  --color-accent-light: #dce8df;
  --color-text-primary: #1a231a;
  --color-text-secondary: #4a554a;
  --color-text-muted: #6b766b;
  --color-surface: #ffffff;
  --color-border: #d4dcd0;
  --color-success: #3d6b4f;
  --color-error: #b0443a;

  /* Spacing */
  --section-padding: 5rem 0;
  --section-padding-lg: 6rem 0;
  --section-padding-sm: 3.5rem 0;

  /* Typography */
  --font-display: 'Outfit', 'Noto Sans HK', sans-serif;
  --font-body: 'Noto Sans HK', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shape */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Nav */
  --nav-height: 72px;

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 150ms var(--ease-standard);
  --transition-base: 300ms var(--ease-out-expo);
  --transition-slow: 500ms var(--ease-out-expo);
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  --color-bg-primary: #111711;
  --color-bg-secondary: #1a221a;
  --color-accent: #5a9e6f;
  --color-accent-hover: #6db882;
  --color-accent-light: #1e2a22;
  --color-text-primary: #e4ede4;
  --color-text-secondary: #a0b0a0;
  --color-text-muted: #7a8a7a;
  --color-surface: #1a241a;
  --color-border: #2a342a;
  --color-success: #5a9e6f;
  --color-error: #d46a5a;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  transition: background-color var(--transition-slow), color var(--transition-slow);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.display-heading {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.body-text {
  font-family: var(--font-body);
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 65ch;
}

.text-muted-custom {
  color: var(--color-text-muted);
}

/* --- Section --- */
.section {
  padding: var(--section-padding);
}
.section-lg {
  padding: var(--section-padding-lg);
}
.section-sm {
  padding: var(--section-padding-sm);
}

/* --- Navbar --- */
.navbar-custom {
  height: var(--nav-height);
  background: rgba(244, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base), border-color var(--transition-slow);
  z-index: 1030;
}
[data-theme="dark"] .navbar-custom {
  background: rgba(17, 23, 17, 0.92);
}
.navbar-custom .navbar-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}
.navbar-custom .nav-link {
  font-family: var(--font-display);
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 0.5rem 1rem;
  transition: color var(--transition-fast);
  letter-spacing: -0.005em;
}
.navbar-custom .nav-link:hover,
.navbar-custom .nav-link.active {
  color: var(--color-accent);
}
.navbar-custom .navbar-toggler {
  border: none;
  padding: 0.25rem;
  color: var(--color-text-primary);
}
.navbar-custom .navbar-toggler:focus {
  box-shadow: none;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- Buttons --- */
.btn-primary-custom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: -0.005em;
  padding: 0.7rem 1.75rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: #ffffff;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary-custom:hover {
  background: var(--color-accent-hover);
  color: #ffffff;
  transform: translateY(-1px);
}
.btn-primary-custom:active {
  transform: translateY(0) scale(0.98);
}

.btn-outline-custom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: -0.005em;
  padding: 0.7rem 1.75rem;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}
.btn-outline-custom:hover {
  background: var(--color-accent);
  color: #ffffff;
}
.btn-outline-custom:active {
  transform: scale(0.98);
}

/* --- Hero --- */
.hero-section {
  min-height: calc(100dvh - var(--nav-height));
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
}
.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  max-height: 75vh;
}
.hero-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

/* --- Stats Banner --- */
.stats-banner {
  background: var(--color-accent);
  color: #ffffff;
  padding: 2.5rem 0;
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.stat-label {
  font-size: 0.9rem;
  opacity: 0.85;
  margin-top: 0.25rem;
}

/* --- Cards --- */
.card-custom {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.card-custom:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(61, 107, 79, 0.08);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(61, 107, 79, 0.1);
}
.service-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.service-card-body {
  padding: 1.5rem;
}
.service-price {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.01em;
}

/* --- Blog Cards --- */
.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  height: 100%;
}
.blog-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(61, 107, 79, 0.1);
}
.blog-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.blog-card-body {
  padding: 1.5rem;
}
.blog-card-date {
  font-size: 0.825rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}
.blog-card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}
.blog-card-title a {
  color: var(--color-text-primary);
  text-decoration: none;
}
.blog-card-title a:hover {
  color: var(--color-accent);
}

/* --- Pagination --- */
.pagination-custom .page-link {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.9rem;
  margin: 0 0.15rem;
  transition: all var(--transition-fast);
}
.pagination-custom .page-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}
.pagination-custom .page-item.active .page-link {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}
.pagination-custom .page-item.disabled .page-link {
  color: var(--color-text-muted);
  background: transparent;
  border-color: var(--color-border);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 3.5rem 0 2rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}
.footer-heading {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-primary);
  margin-bottom: 1rem;
}
.footer-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: block;
  padding: 0.2rem 0;
}
.footer-link:hover {
  color: var(--color-accent);
}
.footer-bottom {
  border-top: 1px solid var(--color-border);
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  font-size: 0.825rem;
  color: var(--color-text-muted);
}

/* --- Contact Form --- */
.form-control-custom {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-control-custom:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(61, 107, 79, 0.15);
}
.form-control-custom::placeholder {
  color: var(--color-text-muted);
}
.form-label-custom {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 0.4rem;
  display: block;
}
textarea.form-control-custom {
  min-height: 140px;
  resize: vertical;
}
.thank-you-message {
  display: none;
  text-align: center;
  padding: 3rem 2rem;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-accent);
}
.thank-you-message.visible {
  display: block;
}

/* --- Full Screen Background Section --- */
.section-full-bg {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.section-full-bg .bg-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.section-full-bg .bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26, 35, 26, 0.82), rgba(26, 35, 26, 0.45));
  z-index: 1;
}
.section-full-bg .bg-content {
  position: relative;
  z-index: 2;
}

/* --- Logo Wall --- */
.logo-wall-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}
.logo-wall-item:hover {
  opacity: 1;
}

/* --- About Timeline --- */
.timeline-item {
  position: relative;
  padding-left: 2rem;
  padding-bottom: 2.5rem;
  border-left: 2px solid var(--color-border);
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}
.timeline-year {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

/* --- Animations --- */
@media (prefers-reduced-motion: no-preference) {
  .fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
  }
  .fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .stagger-item {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s var(--ease-out-expo), transform 0.5s var(--ease-out-expo);
  }
  .stagger-item.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .fade-in-up,
  .stagger-item {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* --- Mission Section --- */
.mission-quote {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 48rem;
}

/* --- Page Header (for sub-pages) --- */
.page-header {
  padding-top: calc(var(--nav-height) + 3rem);
  padding-bottom: 2.5rem;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

/* --- Utility --- */
.bg-accent-light {
  background: var(--color-accent-light);
}
.text-accent {
  color: var(--color-accent);
}
.border-color-custom {
  border-color: var(--color-border);
}