/* ==========================================================================
   STYLE 12: DARK WELLNESS
   A dark-mode theme channeling "from darkness to light."
   Deep teal accents with neon-like glows, gold CTA highlights.
   Modernized: CSS Nesting, Container Queries, @layer, oklch(), clamp(),
   :has(), scroll-driven animations, view transitions, light-dark().
   NOTE: prefers-color-scheme: dark inverts to LIGHT mode.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swap');

/* --------------------------------------------------------------------------
   Layer Definitions
   -------------------------------------------------------------------------- */
@layer reset, base, components, utilities;

/* --------------------------------------------------------------------------
   Custom Property Overrides — Dark by default
   -------------------------------------------------------------------------- */
@layer base {
:root {
    --color-primary: oklch(0.78 0.13 178);
    --color-primary-rgb: 78, 205, 196;
    --color-secondary: oklch(0.90 0.12 90);
    --color-secondary-rgb: 255, 230, 109;
    --color-accent: oklch(0.78 0.13 178);
    --color-accent-rgb: 78, 205, 196;
    --color-text: oklch(0.93 0.01 200);
    --color-text-light: #94A3B8;
    --color-text-inverse: #FFFFFF;
    --color-bg: oklch(0.15 0.03 200);
    --color-bg-alt: oklch(0.20 0.03 195);
    --color-bg-dark: oklch(0.10 0.03 200);
    --color-border: rgba(78, 205, 196, 0.15);
    --font-heading: 'DM Sans', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-weight-light: 400;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 500;
    --font-weight-bold: 700;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.30);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.40);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.50);
    --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.60);
    --glow-primary: 0 0 30px rgba(78, 205, 196, 0.15);
    --hero-overlay: linear-gradient(180deg, rgba(15, 26, 30, 0.85), rgba(15, 26, 30, 0.60));
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* --------------------------------------------------------------------------
   Light Mode Override (inverted — since default is dark)
   -------------------------------------------------------------------------- */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: oklch(0.48 0.14 178);
        --color-secondary: oklch(0.65 0.14 80);
        --color-accent: oklch(0.48 0.14 178);
        --color-text: oklch(0.20 0.03 200);
        --color-text-light: #4A5568;
        --color-text-inverse: #0F1A1E;
        --color-bg: oklch(0.97 0.01 200);
        --color-bg-alt: oklch(0.94 0.01 195);
        --color-bg-dark: oklch(0.90 0.01 200);
        --color-border: rgba(78, 205, 196, 0.20);
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
        --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
        --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.10);
        --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.14);
        --glow-primary: 0 0 20px rgba(78, 205, 196, 0.08);
    }
}
} /* end @layer base */

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
@layer base {
body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    view-transition-name: body;
}
} /* end @layer base */

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
@layer base {
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-inverse);
    letter-spacing: -0.01em;
    font-size: clamp(1rem, 2.2vw + 0.5rem, 3.5rem);
}

@media (prefers-color-scheme: dark) {
    h1, h2, h3, h4, h5, h6 {
        color: var(--color-text);
    }
}

h1 { font-weight: var(--font-weight-bold); }
h2 { font-weight: var(--font-weight-bold); }
h3, h4 { font-weight: var(--font-weight-medium); }

p, li {
    color: var(--color-text);
    line-height: 1.75;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast), text-shadow var(--transition-fast);

    &:hover {
        color: oklch(0.82 0.12 176);
        text-shadow: 0 0 12px rgba(var(--color-primary-rgb), 0.40);
    }
}
} /* end @layer base */

/* --------------------------------------------------------------------------
   Cards — Dark Surfaces with Neon Borders (Container Query enabled)
   -------------------------------------------------------------------------- */
@layer components {
.card,
.program-card,
.contact-card,
.blog-card,
.nav-card,
.sidebar-widget {
    container-type: inline-size;
    background: var(--color-bg-alt);
    border: 1px solid rgba(var(--color-primary-rgb), 0.10);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: clamp(1rem, 3cqi, 2.5rem);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    view-transition-name: card;

    &:hover {
        border-color: rgba(var(--color-primary-rgb), 0.35);
        box-shadow: var(--glow-primary), var(--shadow-lg);
    }

    @container (max-width: 350px) {
        padding: clamp(0.75rem, 2cqi, 1.25rem);
    }
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   :has() Contextual Styling
   -------------------------------------------------------------------------- */
@layer components {
@supports selector(:has(*)) {
    .card:has(img) {
        overflow: hidden;
        padding-top: 0;
    }

    .card:has(.badge) {
        border-left: 2px solid var(--color-primary);
    }

    section:has(.card:hover) {
        background: color-mix(in oklch, var(--color-bg) 95%, var(--color-primary));
    }
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   Gradient Border Accent (decorative top-line)
   -------------------------------------------------------------------------- */
@layer components {
.card::before,
.program-card::before,
.contact-card::before,
.blog-card::before {
    content: '';
    display: block;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card:hover::before,
.program-card:hover::before,
.contact-card:hover::before,
.blog-card:hover::before {
    opacity: 1;
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   Buttons — Gold CTA, Teal Secondary
   -------------------------------------------------------------------------- */
@layer components {
.btn,
button,
.btn-primary, .btn-secondary, .btn-outline {
    font-family: var(--font-body);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-md);
    border: none;
    letter-spacing: 0.02em;
    padding: clamp(0.5rem, 1.5vw, 0.85rem) clamp(1rem, 3vw, 2rem);
    transition: box-shadow var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.btn-primary {
    background: var(--color-secondary);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 20px rgba(var(--color-secondary-rgb), 0.25);

    &:hover {
        box-shadow: 0 6px 30px rgba(var(--color-secondary-rgb), 0.40);
        filter: brightness(1.08);
    }
}

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

    &:hover {
        background: rgba(var(--color-primary-rgb), 0.10);
        box-shadow: 0 0 20px rgba(var(--color-primary-rgb), 0.15);
    }
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
@layer components {
  .section--alt {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
  }

  .cta-section.section--alt {
    background-color: var(--color-primary);
    background-image: none;
    color: var(--color-text-inverse);
  }
} /* end @layer components */

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
@layer components {
.hero,
.page-hero {
    background: linear-gradient(180deg, var(--color-bg-dark), var(--color-bg));
    padding: clamp(2rem, 8vw, 6rem) clamp(1rem, 4vw, 3rem);
    view-transition-name: hero;

    & h1 {
        color: #FFFFFF;
        text-shadow: 0 0 40px rgba(var(--color-primary-rgb), 0.20);
    }
}

@media (prefers-color-scheme: dark) {
    .hero,
    .page-hero {
        background: linear-gradient(180deg, var(--color-bg-dark), var(--color-bg));

        & h1 {
            color: var(--color-text);
            text-shadow: none;
        }
    }
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
@layer components {
nav,
.navbar,
.site-header {
    background: color-mix(in oklch, var(--color-bg) 90%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(var(--color-primary-rgb), 0.08);
    view-transition-name: nav;

    & a {
        color: var(--color-text);
        font-weight: var(--font-weight-medium);
        transition: color var(--transition-fast);

        &:hover {
            color: var(--color-primary);
        }
    }
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   Form Elements
   -------------------------------------------------------------------------- */
@layer components {
input, textarea, select {
    font-family: var(--font-body);
    background: color-mix(in oklch, var(--color-bg-alt) 80%, transparent);
    border: 1.5px solid rgba(var(--color-primary-rgb), 0.15);
    border-radius: var(--radius-md);
    color: var(--color-text);
    padding: clamp(0.5rem, 1.5vw, 0.875rem) clamp(0.75rem, 2vw, 1.25rem);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);

    &:focus {
        outline: none;
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15), 0 0 20px rgba(var(--color-primary-rgb), 0.08);
    }

    &::placeholder {
        color: var(--color-text-light);
        opacity: 0.6;
    }
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   Dividers & Selection
   -------------------------------------------------------------------------- */
@layer base {
hr {
    border: none;
    border-top: 1px solid rgba(var(--color-primary-rgb), 0.12);
}

::selection {
    background: rgba(var(--color-primary-rgb), 0.30);
    color: #FFFFFF;
}
} /* end @layer base */

/* --------------------------------------------------------------------------
   Footer — Deep Dark
   -------------------------------------------------------------------------- */
@layer components {
footer,
.site-footer {
    background: var(--color-bg-dark);
    color: var(--color-text-light);
    border-top: 1px solid rgba(var(--color-primary-rgb), 0.08);
    padding: clamp(2rem, 5vw, 4rem) clamp(1rem, 3vw, 2rem);
    view-transition-name: footer;

    & a {
        color: var(--color-primary);

        &:hover {
            text-shadow: 0 0 10px rgba(var(--color-primary-rgb), 0.30);
        }
    }
}
} /* end @layer components */

/* --------------------------------------------------------------------------
   Badges & Tags
   -------------------------------------------------------------------------- */
@layer components {
.badge,
.tag {
    font-family: var(--font-body);
    font-weight: var(--font-weight-medium);
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    border-radius: var(--radius-sm);
    background: rgba(var(--color-primary-rgb), 0.10);
    color: var(--color-primary);
    border: 1px solid rgba(var(--color-primary-rgb), 0.20);
    padding: clamp(0.15rem, 0.5vw, 0.3rem) clamp(0.4rem, 1.2vw, 0.8rem);
}
} /* end @layer components */

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

::-webkit-scrollbar-thumb {
    background: var(--color-bg-alt);
    border-radius: 10px;
    border: 2px solid var(--color-bg);

    &:hover {
        background: rgba(var(--color-primary-rgb), 0.30);
    }
}
} /* end @layer utilities */

/* --------------------------------------------------------------------------
   Misc Decorative
   -------------------------------------------------------------------------- */
@layer utilities {
img {
    border-radius: var(--radius-md);
    opacity: 0.95;
}

blockquote {
    padding: clamp(0.75rem, 2vw, 1.25rem) clamp(1rem, 3vw, 2rem);
    border-left: 3px solid var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.05);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--color-text-light);
    font-style: italic;
}

table {
    & th {
        background: rgba(var(--color-primary-rgb), 0.08);
        color: var(--color-primary);
        font-weight: var(--font-weight-bold);
    }

    & td {
        border-bottom: 1px solid rgba(var(--color-primary-rgb), 0.06);
    }
}
} /* end @layer utilities */

/* --------------------------------------------------------------------------
   Scroll-Driven Animations
   -------------------------------------------------------------------------- */
@layer utilities {
@supports (animation-timeline: view()) {
    .card,
    .program-card,
    .blog-card {
        animation: glowFadeIn ease both;
        animation-timeline: view();
        animation-range: entry 0% entry 35%;
    }

    @keyframes glowFadeIn {
        from {
            opacity: 0;
            transform: translateY(24px) scale(0.97);
            box-shadow: none;
        }
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
            box-shadow: var(--shadow-md);
        }
    }

    footer,
    .site-footer {
        animation: footerReveal ease both;
        animation-timeline: view();
        animation-range: entry 0% entry 30%;
    }

    @keyframes footerReveal {
        from { opacity: 0; }
        to { opacity: 1; }
    }
}
} /* end @layer utilities */