/* ==========================================================================
   Style 07 — Luxury Retreat
   Rehab Website Factory

   An elegant, high-end aesthetic with deep navy, warm golds, and refined
   serif typography. Communicates exclusivity, sophistication, and quality.

   Modernized: CSS Nesting, Container Queries, :has(), clamp(),
   @layer, oklch(), color-mix(), scroll-driven animations,
   view transitions, dark mode
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,400&family=Lato:wght@300;400;700&display=swap');

/* --------------------------------------------------------------------------
   Cascade Layers
   -------------------------------------------------------------------------- */
@layer theme, base, components, utilities;

/* --------------------------------------------------------------------------
   Custom Properties Override
   -------------------------------------------------------------------------- */
@layer theme {
  :root {
    /* Colors — oklch */
    --color-primary: oklch(0.33 0.04 250);
    --color-primary-rgb: 44, 62, 80;
    --color-secondary: oklch(0.53 0.04 60);
    --color-secondary-rgb: 139, 115, 85;
    --color-accent: oklch(0.76 0.12 85);
    --color-accent-rgb: 212, 175, 55;
    --color-text: oklch(0.15 0 0);
    --color-text-light: #6B6B6B;
    --color-text-inverse: #FAF8F5;
    --color-bg: #FAF8F5;
    --color-bg-alt: #FFFFFF;
    --color-bg-dark: oklch(0.16 0.03 270);
    --color-border: #DDD5CA;

    /* Typography */
    --font-heading: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Lato', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 600;

    /* Fluid spacing */
    --space-xs: clamp(0.25rem, 0.5vw, 0.5rem);
    --space-sm: clamp(0.5rem, 1vw, 1rem);
    --space-md: clamp(1rem, 2vw, 2rem);
    --space-lg: clamp(1.5rem, 3vw, 3rem);
    --space-xl: clamp(2rem, 5vw, 5rem);

    /* Border Radius — refined, sharp */
    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 4px;
    --radius-xl: 4px;

    /* Shadows — subtle, elegant */
    --shadow-sm: 0 1px 4px rgba(44, 62, 80, 0.06);
    --shadow-md: 0 4px 12px rgba(44, 62, 80, 0.08);
    --shadow-lg: 0 8px 28px rgba(44, 62, 80, 0.1);
    --shadow-xl: 0 16px 44px rgba(44, 62, 80, 0.14);

    /* Hero Overlay */
    --hero-overlay: linear-gradient(
      135deg,
      oklch(0.16 0.03 270 / 0.75) 0%,
      oklch(0.33 0.04 250 / 0.55) 50%,
      oklch(0.53 0.04 60 / 0.3) 100%
    );

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.35s ease;
    --transition-slow: 0.6s ease;
  }

  /* --------------------------------------------------------------------------
     Dark Mode
     -------------------------------------------------------------------------- */
  @media (prefers-color-scheme: dark) {
    :root {
      --color-primary: oklch(0.70 0.04 250);
      --color-secondary: oklch(0.63 0.05 60);
      --color-accent: oklch(0.76 0.12 85);
      --color-text: oklch(0.90 0.01 60);
      --color-text-light: oklch(0.60 0.02 60);
      --color-text-inverse: #0F0F18;
      --color-bg: oklch(0.14 0.02 270);
      --color-bg-alt: oklch(0.18 0.02 270);
      --color-bg-dark: oklch(0.08 0.03 270);
      --color-border: oklch(0.32 0.03 60);

      --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.35);
      --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
      --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.45);
      --shadow-xl: 0 16px 44px rgba(0, 0, 0, 0.55);

      --hero-overlay: linear-gradient(
        135deg,
        oklch(0.06 0.02 270 / 0.88) 0%,
        oklch(0.12 0.03 250 / 0.7) 50%,
        oklch(0.20 0.04 60 / 0.45) 100%
      );
    }
  }
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */
@layer base {
  body {
    background-color: var(--color-bg);
    background-image:
      radial-gradient(ellipse at 50% 0%, color-mix(in oklch, var(--color-accent) 2%, transparent) 0%, transparent 50%);
    view-transition-name: page-body;
  }

  h1 {
    font-weight: 300;
    letter-spacing: 0.02em;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
  }

  h2 {
    font-weight: 400;
    letter-spacing: 0.015em;
    font-size: clamp(1.75rem, 4vw, 2.75rem);

    &::after {
      content: '';
      display: block;
      width: clamp(40px, 8vw, 80px);
      height: 3px;
      background: var(--color-accent);
      margin-top: var(--space-xs);
      opacity: 0.8;
    }
  }

  h3 {
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  }

  hr {
    border: none;
    border-top: 1px solid color-mix(in oklch, var(--color-accent) 30%, transparent);
  }

  ::selection {
    background: color-mix(in oklch, var(--color-accent) 20%, transparent);
    color: var(--color-text);
  }
}

/* --------------------------------------------------------------------------
   Component Styles
   -------------------------------------------------------------------------- */
@layer components {
  /* Sections */
  .section--alt {
    background-color: var(--color-bg-alt);
    border-top: 1px solid color-mix(in oklch, var(--color-accent) 15%, transparent);
    border-bottom: 1px solid color-mix(in oklch, var(--color-accent) 15%, transparent);
    container-type: inline-size;
  }

  .cta-section.section--alt {
    background-color: var(--color-primary);
    background-image: none;
    color: var(--color-text-inverse);
  }

  .section--dark {
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, oklch(0.10 0.02 270) 100%);
    color: var(--color-text-inverse);
  }

  /* Cards — container queries + nesting */
  .card,
  .program-card,
  .contact-card,
  .blog-card,
  .nav-card,
  .sidebar-widget {
    background: var(--color-bg-alt);
    border: 1px solid color-mix(in oklch, var(--color-accent) 12%, transparent);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    container-type: inline-size;
    view-transition-name: card;

    &:hover {
      box-shadow: var(--shadow-md);
      border-color: color-mix(in oklch, var(--color-accent) 30%, transparent);
    }
  }

  /* Gold top line */
  .card::before,
  .program-card::before,
  .contact-card::before,
  .blog-card::before {
    border-top: 2px solid var(--color-accent);
    opacity: 0.6;
  }

  @container (max-width: 300px) {
    .card, .program-card, .blog-card {
      padding: var(--space-sm);
    }
  }

  @container (min-width: 500px) {
    .card, .program-card, .blog-card {
      padding: var(--space-md);
    }
  }

  /* :has() contextual styling */
  section:has(.card) {
    padding-block: var(--space-lg);
  }

  .hero:has(video) {
    min-height: 85vh;
  }

  /* Hero text must be white on background images */
  .hero-fullwidth .hero-content,
  .hero-fullwidth .hero-content h1,
  .hero-fullwidth .hero-content p,
  .page-hero h1,
  .page-hero p {
    color: var(--color-text-inverse, #FFFFFF);
  }

  .hero-fullwidth .hero-content h1,
  .page-hero h1 {
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.8), 0 1px 4px rgba(0, 0, 0, 0.6);
  }

  .hero-fullwidth .hero-content p,
  .page-hero p {
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7), 0 1px 3px rgba(0, 0, 0, 0.5);
  }

  /* Hub & Spoke hero text — sharp pure white on overlay (all pages) */
  .hub-hero-content h1,
  .hub-hero-content .hub-hero-sub,
  .spoke-hero-content h1,
  .spoke-hero-content p {
    color: #FFFFFF;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.8), 0 1px 4px rgba(0, 0, 0, 0.6);
  }

  .hero-fullwidth .btn-secondary {
    color: #FFFFFF;
    border-color: #FFFFFF;

    &:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: #FFFFFF;
    }
  }

  .card:has(img) {
    overflow: hidden;
  }

  /* Buttons — nesting */
  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-outline,
  .btn--phone {
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: var(--font-weight-light);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-size: clamp(0.7em, 1vw, 0.8em);
    transition: all var(--transition-base);
    padding: clamp(0.6rem, 1.2vw, 0.9rem) clamp(1.25rem, 3vw, 2.5rem);
  }

  .btn-primary,
  .button--primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border: 1px solid var(--color-primary);

    &:hover {
      background: color-mix(in oklch, var(--color-primary) 80%, black);
      box-shadow: var(--shadow-md);
    }
  }

  .btn-secondary,
  .button--secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-accent);

    &:hover {
      background: color-mix(in oklch, var(--color-accent) 6%, transparent);
      border-color: var(--color-accent);
    }
  }

  .btn-accent,
  .button--accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, oklch(0.72 0.11 82) 100%);
    color: var(--color-primary);
    border: none;
    font-weight: var(--font-weight-normal);

    &:hover {
      filter: brightness(1.08);
    }
  }

  /* Navigation — nesting */
  .site-header {
    background: color-mix(in oklch, var(--color-bg) 97%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid color-mix(in oklch, var(--color-accent) 10%, transparent);
    view-transition-name: header;
  }

  .main-nav a, .mega-nav a, .nav-links a {
    font-family: var(--font-body);
    font-weight: var(--font-weight-light);
    font-size: 0.8em;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text);
    transition: color var(--transition-fast);

    &:hover {
      color: var(--color-accent);
    }

    &.active {
      color: var(--color-primary);
      border-bottom: 1px solid var(--color-accent);
    }
  }

  .nav-item.active > a {
    color: var(--color-primary);
    border-bottom: 1px solid var(--color-accent);
  }

  /* Forms — nesting */
  input,
  textarea,
  select {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: var(--font-weight-light);
    background: var(--color-bg-alt);
    color: var(--color-text);
    letter-spacing: 0.02em;
    transition: border-color var(--transition-fast);
    padding: clamp(0.5rem, 1vw, 0.75rem) clamp(0.75rem, 1.5vw, 1rem);

    &:focus {
      border-color: var(--color-accent);
      box-shadow: none;
      outline: none;
    }
  }

  label {
    font-family: var(--font-body);
    font-weight: var(--font-weight-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.8em;
    color: var(--color-text-light);
  }

  /* Footer — nesting */
  .footer,
  footer {
    background: var(--color-bg-dark);
    color: color-mix(in oklch, var(--color-text-inverse) 90%, transparent);
    border-top: 1px solid color-mix(in oklch, var(--color-accent) 20%, transparent);
    view-transition-name: footer;

    & h3 {
      color: #FFFFFF;
    }

    & a {
      color: color-mix(in oklch, var(--color-text-inverse) 80%, transparent);
      transition: color var(--transition-fast);

      &:hover {
        color: var(--color-accent);
      }
    }
  }

  /* Testimonials */
  blockquote,
  .testimonial,
  .testimonials-grid blockquote {
    padding: var(--space-sm) var(--space-md);
    border-left: 2px solid var(--color-accent);
    font-family: var(--font-heading);
    font-style: italic;
    font-size: clamp(1em, 1.5vw, 1.15em);
    color: var(--color-text);
    letter-spacing: 0.01em;
  }

  /* Badges */
  .badge,
  .tag {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    border-radius: 0;
    font-family: var(--font-body);
    font-weight: var(--font-weight-light);
    font-size: 0.7em;
    text-transform: uppercase;
    letter-spacing: 0.12em;
  }

  /* Decorative Divider */
  .divider,
  .section-divider {
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='10' xmlns='http://www.w3.org/2000/svg'%3E%3Cline x1='0' y1='5' x2='40' y2='5' stroke='%23D4AF37' stroke-width='0.5'/%3E%3Ccircle cx='50' cy='5' r='2' fill='none' stroke='%23D4AF37' stroke-width='0.5'/%3E%3Cline x1='60' y1='5' x2='100' y2='5' stroke='%23D4AF37' stroke-width='0.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
  }

  /* Scrollbar */
  ::-webkit-scrollbar {
    background: var(--color-bg);
  }

  ::-webkit-scrollbar-thumb {
    background: color-mix(in oklch, var(--color-secondary) 25%, transparent);
    border-radius: 0;

    &:hover {
      background: color-mix(in oklch, var(--color-secondary) 45%, transparent);
    }
  }
}

/* Scroll-driven animations intentionally removed (CLAUDE.md mandatory rule).
   Keyframes with opacity:0 caused invisible content on browsers that
   supported animation-timeline but never fired the keyframe. */
@layer utilities {
  @supports (view-transition-name: none) {
    ::view-transition-old(page-body),
    ::view-transition-new(page-body) {
      animation-duration: 0.4s;
    }
    ::view-transition-old(hero),
    ::view-transition-new(hero) {
      animation-duration: 0.5s;
    }
  }
}