/* ==========================================================================
   Style 08 — Fresh Start
   Rehab Website Factory

   A light, airy, and optimistic aesthetic with fresh greens, sunny yellows,
   and sky blues. Radiates positivity, energy, and a clean new beginning.

   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=Quicksand:wght@400;500;700&family=Nunito:wght@400;600;700&display=swap');

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

/* --------------------------------------------------------------------------
   Custom Properties Override
   -------------------------------------------------------------------------- */
@layer theme {
  :root {
    /* Colors — oklch */
    --color-primary: oklch(0.52 0.12 160);
    --color-primary-rgb: 27, 134, 89;
    --color-secondary: oklch(0.88 0.10 95);
    --color-secondary-rgb: 247, 220, 111;
    --color-accent: oklch(0.78 0.07 230);
    --color-accent-rgb: 133, 193, 233;
    --color-text: oklch(0.32 0.04 160);
    --color-text-light: #5A8070;
    --color-text-inverse: #FFFFFF;
    --color-bg: #FEFFFE;
    --color-bg-alt: #F0FFF4;
    --color-bg-dark: oklch(0.22 0.04 155);
    --color-border: #C8EDD8;

    /* Typography */
    --font-heading: 'Quicksand', sans-serif;
    --font-body: 'Nunito', sans-serif;
    --font-weight-light: 400;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* 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 — very rounded, friendly */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    /* Shadows — light, pastel-tinted */
    --shadow-sm: 0 2px 8px rgba(62, 180, 137, 0.08);
    --shadow-md: 0 4px 18px rgba(62, 180, 137, 0.1);
    --shadow-lg: 0 8px 30px rgba(62, 180, 137, 0.12);
    --shadow-xl: 0 16px 48px rgba(62, 180, 137, 0.16);

    /* Hero Overlay */
    --hero-overlay: linear-gradient(
      180deg,
      rgba(15, 30, 25, 0.55) 0%,
      rgba(20, 35, 40, 0.65) 100%
    );

    /* Transitions — bouncy */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-slow: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  }

  /* --------------------------------------------------------------------------
     Dark Mode
     -------------------------------------------------------------------------- */
  @media (prefers-color-scheme: dark) {
    :root {
      --color-primary: oklch(0.60 0.12 160);
      --color-secondary: oklch(0.80 0.08 95);
      --color-accent: oklch(0.68 0.06 230);
      --color-text: oklch(0.88 0.02 160);
      --color-text-light: oklch(0.65 0.04 160);
      --color-text-inverse: #0A1A12;
      --color-bg: oklch(0.14 0.03 155);
      --color-bg-alt: oklch(0.18 0.03 155);
      --color-bg-dark: oklch(0.10 0.04 155);
      --color-border: oklch(0.30 0.04 155);

      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
      --shadow-md: 0 4px 18px rgba(0, 0, 0, 0.4);
      --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.45);
      --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.55);

      --hero-overlay: linear-gradient(
        135deg,
        oklch(0.12 0.05 160 / 0.85) 0%,
        oklch(0.20 0.04 230 / 0.6) 50%,
        oklch(0.25 0.05 95 / 0.4) 100%
      );
    }
  }
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */
@layer base {
  body {
    background-color: var(--color-bg);
    background-image:
      radial-gradient(circle at 10% 20%, rgba(62, 180, 137, 0.04) 0%, transparent 40%),
      radial-gradient(circle at 90% 80%, color-mix(in oklch, var(--color-accent) 4%, transparent) 0%, transparent 40%),
      radial-gradient(circle at 50% 50%, color-mix(in oklch, var(--color-secondary) 3%, transparent) 0%, transparent 40%);
    view-transition-name: page-body;
  }

  h1, h2, h3 {
    letter-spacing: -0.02em;
    font-weight: var(--font-weight-bold);
  }

  h1 {
    color: var(--color-primary);
    font-size: clamp(2rem, 5vw, 3.5rem);
  }

  h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.5rem);

    &::after {
      content: '';
      display: block;
      width: clamp(40px, 8vw, 80px);
      height: 3px;
      background: var(--color-secondary);
      margin-top: var(--space-xs);
      border-radius: 2px;
      opacity: 0.8;
    }
  }

  h3 {
    color: var(--color-text);
    font-size: clamp(1.15rem, 2.5vw, 1.75rem);
  }

  hr {
    border: none;
    border-top: 2px solid transparent;
    background-image: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    background-size: 100% 2px;
    background-repeat: no-repeat;
    opacity: 0.3;
  }

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

/* --------------------------------------------------------------------------
   Component Styles
   -------------------------------------------------------------------------- */
@layer components {
  /* Sections */
  .section--alt {
    background-color: var(--color-bg-alt);
    background-image:
      url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 50'%3E%3Cpath fill='%23FEFFFE' d='M0,25 C240,45 480,5 720,25 C960,45 1200,5 1440,25 L1440,0 L0,0 Z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-size: 100% 50px;
    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(135deg, var(--color-bg-dark) 0%, oklch(0.28 0.04 150) 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);
    border: 1px solid color-mix(in oklch, var(--color-primary) 10%, 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);
      transform: translateY(-4px);
      border-color: color-mix(in oklch, var(--color-primary) 20%, transparent);
    }
  }

  /* Pastel gradient corner accent */
  .card::before,
  .card, .program-card, .contact-card, .blog-card::before {
    background: linear-gradient(135deg, rgba(62, 180, 137, 0.1) 0%, color-mix(in oklch, var(--color-accent) 5%, transparent) 100%);
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
  }

  .card:hover::before,
  .card, .program-card, .contact-card, .blog-card:hover::before {
    opacity: 1;
  }

  @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: 80vh;
  }

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

  /* Buttons — nesting */
  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-outline,
  .btn--phone {
    border-radius: var(--radius-xl);
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.01em;
    transition: all var(--transition-base);
    padding: clamp(0.5rem, 1.2vw, 0.85rem) clamp(1.25rem, 3vw, 2.25rem);
  }

  .btn-primary,
  .button--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, oklch(0.65 0.10 158) 100%);
    color: var(--color-text-inverse);
    border-color: transparent;
    box-shadow: 0 3px 12px rgba(62, 180, 137, 0.3);

    &:hover {
      box-shadow: 0 6px 20px rgba(62, 180, 137, 0.4);
      transform: translateY(-2px) scale(1.02);
    }
  }

  .btn-secondary,
  .button--secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);

    &:hover {
      background: color-mix(in oklch, var(--color-primary) 6%, transparent);
      transform: translateY(-1px);
    }
  }

  .btn-accent,
  .button--accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, oklch(0.82 0.06 225) 100%);
    color: var(--color-text);
    border-color: transparent;
  }

  /* Navigation — nesting */
  .site-header,
  .bento-header {
    background: var(--color-bg);
    border-bottom: 2px solid var(--color-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    view-transition-name: header;
  }

  .main-nav a, .mega-nav a, .nav-links a {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    transition: color var(--transition-fast);

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

    &.active {
      color: var(--color-primary);
      border-bottom: 3px solid var(--color-secondary);
      border-radius: 0 0 2px 2px;
    }
  }

  .nav-item.active > a {
    color: var(--color-primary);
    border-bottom: 3px solid var(--color-secondary);
  }

  /* Forms — nesting */
  input,
  textarea,
  select {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    padding: clamp(0.5rem, 1vw, 0.75rem) clamp(0.75rem, 1.5vw, 1rem);

    &:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px color-mix(in oklch, var(--color-primary) 15%, transparent);
      outline: none;
    }
  }

  /* Footer — nesting */
  .footer,
  footer {
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, oklch(0.15 0.04 152) 100%);
    color: rgba(255, 255, 255, 0.7);
    view-transition-name: footer;

    & h3 {
      color: #FFFFFF;
    }

    & a {
      color: rgba(255, 255, 255, 0.6);
      transition: color var(--transition-fast);

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

  /* Testimonials */
  blockquote,
  .testimonial,
  .testimonials-grid blockquote {
    padding: var(--space-sm) var(--space-md);
    border-left: 4px solid var(--color-secondary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    background: color-mix(in oklch, var(--color-secondary) 6%, transparent);
    font-style: italic;
  }

  /* Badges */
  .badge,
  .tag {
    background: linear-gradient(135deg, color-mix(in oklch, var(--color-primary) 10%, transparent) 0%, color-mix(in oklch, var(--color-accent) 8%, transparent) 100%);
    color: var(--color-primary);
    border-radius: var(--radius-xl);
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    font-size: 0.85em;
  }

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

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

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

/* --------------------------------------------------------------------------
   Animations & Scroll-Driven Effects
   -------------------------------------------------------------------------- */
@layer utilities {
  @keyframes fresh-bounce-in {
    0% {
      opacity: 0;
      transform: translateY(20px) scale(0.96);
    }
    60% {
      transform: translateY(-4px) scale(1.01);
    }
    100% {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }

  .animate-in,
  [data-animate] {
    animation: fresh-bounce-in 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  }

  @supports (animation-timeline: view()) {
    .animate-in,
    [data-animate] {
      animation: fresh-bounce-in cubic-bezier(0.34, 1.56, 0.64, 1) both;
      animation-timeline: view();
      animation-range: entry 0% entry 35%;
    }

    .hero,
    .page-hero {
      animation: fresh-bounce-in cubic-bezier(0.34, 1.56, 0.64, 1) both;
      animation-timeline: scroll();
      animation-range: 0% 40%;
    }
  }

  @supports (view-transition-name: none) {
    ::view-transition-old(page-body),
    ::view-transition-new(page-body) {
      animation-duration: 0.3s;
    }

    ::view-transition-old(hero),
    ::view-transition-new(hero) {
      animation-duration: 0.35s;
    }
  }
}