/* ==========================================================================
   Sodexus.AI — Design System Foundation
   Extended tokens, surfaces, patterns, cards, industry colors
   ========================================================================== */

/* --- Extended Design Tokens --- */
:root {
    /* Extended color tones */
    --c-primary-deep: #060F19;
    --c-primary-light: #15293D;
    --c-accent-light: #00D4B8;
    --c-accent-muted: #4DC9B8;
    --c-accent-glow: rgba(0, 168, 150, 0.15);
    --c-accent-secondary-muted: #D49E00;

    /* Signal colors */
    --c-signal-success: #00C48C;
    --c-signal-warning: #F7B801;
    --c-signal-error: #E85D75;
    --c-signal-info: #0077B6;

    /* Surface system */
    --c-surface-elevated: #FFFFFF;
    --c-surface-base: #F8F9FB;
    --c-surface-sunken: #EEF0F4;
    --c-surface-dark: rgba(255, 255, 255, 0.04);
    --c-surface-dark-elevated: rgba(255, 255, 255, 0.08);

    /* Text system */
    --c-text-muted: #888888;
    --c-text-on-dark-muted: rgba(255, 255, 255, 0.6);

    /* Border system */
    --c-border-subtle: rgba(13, 27, 42, 0.08);
    --c-border-default: rgba(13, 27, 42, 0.12);
    --c-border-dark: rgba(255, 255, 255, 0.08);
    --c-border-dark-accent: rgba(0, 168, 150, 0.3);

    /* Typography scale */
    --type-display: clamp(3rem, 6vw, 5rem);
    --type-h1: clamp(2.5rem, 5vw, 4rem);
    --type-h2: clamp(1.75rem, 3.5vw, 2.75rem);
    --type-h3: clamp(1.25rem, 2vw, 1.5rem);
    --type-body-lg: 1.125rem;
    --type-body: 1rem;
    --type-body-sm: 0.875rem;
    --type-micro: 0.75rem;

    /* Spacing scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Named gradients */
    --gradient-hero: linear-gradient(135deg, #060F19 0%, #0D1B2A 30%, #15293D 60%, #1B263B 100%);
    --gradient-hero-mesh: radial-gradient(ellipse at 20% 50%, rgba(0, 168, 150, 0.08) 0%, transparent 50%),
                          radial-gradient(ellipse at 80% 20%, rgba(247, 184, 1, 0.06) 0%, transparent 40%),
                          radial-gradient(ellipse at 50% 80%, rgba(0, 212, 184, 0.05) 0%, transparent 50%),
                          linear-gradient(135deg, #060F19 0%, #0D1B2A 30%, #15293D 60%, #1B263B 100%);
    --gradient-accent: linear-gradient(135deg, #00A896 0%, #007A6B 100%);
    --gradient-text: linear-gradient(135deg, #00A896, #00D4B8, #F7B801);
    --gradient-accent-glow: radial-gradient(ellipse at 50% 0%, rgba(0, 168, 150, 0.12) 0%, transparent 60%);
    --gradient-section-dark: linear-gradient(180deg, #0D1B2A 0%, #15293D 100%);

    /* Shadow system */
    --shadow-sm: 0 1px 2px rgba(13, 27, 42, 0.05);
    --shadow-md: 0 4px 12px rgba(13, 27, 42, 0.08);
    --shadow-lg: 0 8px 30px rgba(13, 27, 42, 0.12);
    --shadow-xl: 0 16px 50px rgba(13, 27, 42, 0.16);
    --shadow-glow: 0 0 30px rgba(0, 168, 150, 0.15);
    --shadow-card-hover: 0 12px 40px rgba(13, 27, 42, 0.15);

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Industry accent colors */
    --c-industry-manufacturing: #00A896;
    --c-industry-engineering: #0077B6;
    --c-industry-energy: #F7B801;
    --c-industry-it: #7B2FF7;
    --c-industry-hr: #E85D75;

    /* Industry light backgrounds */
    --c-industry-manufacturing-bg: rgba(0, 168, 150, 0.06);
    --c-industry-engineering-bg: rgba(0, 119, 182, 0.06);
    --c-industry-energy-bg: rgba(247, 184, 1, 0.06);
    --c-industry-it-bg: rgba(123, 47, 247, 0.06);
    --c-industry-hr-bg: rgba(232, 93, 117, 0.06);
}

/* --- Card System --- */
.card-elevated {
    background: var(--c-surface-elevated);
    border: 1px solid var(--c-border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card-elevated::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.card-elevated:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--c-border-default);
}

.card-elevated:hover::before {
    transform: scaleX(1);
}

.card-dark {
    background: var(--c-surface-dark-elevated);
    border: 1px solid var(--c-border-dark);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    backdrop-filter: blur(8px);
}

.card-dark:hover {
    border-color: var(--c-border-dark-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

/* Glass card variant */
.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-glass:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Glass card on dark backgrounds */
.card-glass-dark {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card-glass-dark:hover {
    border-color: var(--c-border-dark-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

/* Feature card variant */
.card-feature {
    background: var(--c-surface-elevated);
    border: 1px solid var(--c-border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card-feature::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card-feature:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--c-border-default);
}

.card-feature:hover::after {
    opacity: 1;
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--c-accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-accent);
    flex-shrink: 0;
}

/* --- Industry Color System --- */
[data-industry="manufacturing"] { --card-accent: var(--c-industry-manufacturing); --card-accent-bg: var(--c-industry-manufacturing-bg); }
[data-industry="engineering"]   { --card-accent: var(--c-industry-engineering); --card-accent-bg: var(--c-industry-engineering-bg); }
[data-industry="energy"]        { --card-accent: var(--c-industry-energy); --card-accent-bg: var(--c-industry-energy-bg); }
[data-industry="it-outsourcing"] { --card-accent: var(--c-industry-it); --card-accent-bg: var(--c-industry-it-bg); }
[data-industry="hr"]            { --card-accent: var(--c-industry-hr); --card-accent-bg: var(--c-industry-hr-bg); }

[data-industry] .card-icon {
    color: var(--card-accent);
    background: color-mix(in srgb, var(--card-accent) 15%, transparent);
}

[data-industry].card-elevated::before {
    background: var(--card-accent);
}

/* --- Lattice Background Pattern --- */
.lattice-bg {
    position: relative;
}

.lattice-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.06) 1px, transparent 0);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 0;
}

.lattice-bg > * {
    position: relative;
    z-index: 1;
}

/* Denser lattice variant */
.lattice-bg-dense::after {
    background-size: 20px 20px;
}

/* Lighter lattice for light backgrounds */
.lattice-bg-light {
    position: relative;
}

.lattice-bg-light::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(13, 27, 42, 0.04) 1px, transparent 0);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 0;
}

.lattice-bg-light > * {
    position: relative;
    z-index: 1;
}

/* --- Section Dividers --- */
.section-divider-angle {
    position: relative;
}

.section-divider-angle::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: 0;
    right: 0;
    height: 60px;
    z-index: 2;
    pointer-events: none;
}

.section-divider-angle.dark-to-light::after {
    background: var(--c-primary);
    clip-path: polygon(0 0, 100% 0, 100% 0%, 0 100%);
}

.section-divider-angle.light-to-dark::after {
    background: var(--c-surface-base);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 0%);
}

/* Wave divider variant */
.section-divider-wave::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: 0;
    right: 0;
    height: 40px;
    z-index: 2;
    pointer-events: none;
    background: inherit;
    clip-path: ellipse(55% 100% at 50% 0%);
}

/* --- Gradient Text Utility --- */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Card 3D Tilt Hover --- */
.card-tilt:hover {
    transform: translateY(-6px) rotate3d(1, -1, 0, 2deg);
}

/* --- Animated Gradient Border for CTA --- */
.btn-animated-border {
    position: relative;
    z-index: 1;
}

.btn-animated-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--c-accent), var(--c-accent-secondary), var(--c-accent-light), var(--c-accent));
    background-size: 300% 100%;
    animation: gradient-shift 3s ease infinite;
    z-index: -1;
    opacity: 0.7;
}

.btn-animated-border::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: inherit;
    z-index: -1;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* --- Tab System --- */
.tab-group {
    display: inline-flex;
    background: var(--c-surface-sunken);
    border-radius: var(--radius-full);
    padding: 4px;
    gap: 2px;
}

.tab-btn {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--c-text-light, #555);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: var(--type-body-sm);
    cursor: pointer;
    transition: all 0.25s ease;
}

.tab-btn:hover {
    color: var(--c-primary);
}

.tab-btn.active {
    background: var(--c-surface-elevated);
    color: var(--c-accent);
    box-shadow: var(--shadow-sm);
}

/* Dark variant */
.tab-group-dark {
    background: rgba(255, 255, 255, 0.08);
}

.tab-group-dark .tab-btn {
    color: var(--c-text-on-dark-muted);
}

.tab-group-dark .tab-btn:hover {
    color: white;
}

.tab-group-dark .tab-btn.active {
    background: var(--c-accent);
    color: var(--c-primary);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: tab-fade-in 0.35s ease-out;
}

@keyframes tab-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Scroll Indicator --- */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.6;
    transition: opacity 0.3s ease;
    cursor: pointer;
}

.scroll-indicator:hover {
    opacity: 1;
}

.scroll-indicator-line {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, transparent, var(--c-accent));
    animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
    0%, 100% { opacity: 0.4; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .hero-lattice-canvas {
        display: none !important;
    }

    .card-elevated:hover,
    .card-dark:hover,
    .card-glass:hover,
    .card-glass-dark:hover,
    .card-feature:hover {
        transform: none;
    }
}