/* Liquid Frost Theme System - Light & Dark Modes */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@600;700;800&family=Hanken+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* Light Mode Colors */
    --surface: #f7f9fc;
    --surface-dim: #d8dadd;
    --surface-bright: #f7f9fc;
    --surface-container-lowest: #ffffff;
    --surface-container-low: #f2f4f7;
    --surface-container: #eceef1;
    --surface-container-high: #e6e8eb;
    --surface-container-highest: #e0e3e6;
    --on-surface: #191c1e;
    --on-surface-variant: #444652;
    --inverse-surface: #2d3133;
    --inverse-on-surface: #eff1f4;

    --outline: #747683;
    --outline-variant: #c4c6d4;
    --surface-tint: #3759b3;

    /* Bills Brand Colors */
    --primary: #00205f;
    --on-primary: #ffffff;
    --primary-container: #00338d;
    --on-primary-container: #81a1ff;
    --inverse-primary: #b4c5ff;

    --secondary: #ba002a;
    --on-secondary: #ffffff;
    --secondary-container: #e0273f;
    --on-secondary-container: #fffbff;

    --tertiary: #4a1000;
    --on-tertiary: #ffffff;
    --tertiary-container: #6f1e01;
    --on-tertiary-container: #f9845f;

    --error: #ba1a1a;
    --on-error: #ffffff;
    --error-container: #ffdad6;
    --on-error-container: #93000a;

    --background: #f7f9fc;
    --on-background: #191c1e;
    --surface-variant: #e0e3e6;

    --deep-void: #00005C;
    --glass-highlight: #FFFFFF;

    /* Glass Effect Variables */
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: rgba(0, 0, 92, 0.08);
    --glass-blur: 20px;

    /* Spacing */
    --unit: 8px;
    --container-max: 1440px;
    --gutter: 24px;
    --margin-mobile: 16px;
    --margin-desktop: 48px;

    /* Border Radius */
    --rounded-sm: 0.25rem;
    --rounded: 0.5rem;
    --rounded-md: 0.75rem;
    --rounded-lg: 1rem;
    --rounded-xl: 1.5rem;
    --rounded-full: 9999px;

    /* Typography */
    --font-headline: 'Syne', sans-serif;
    --font-body: 'Hanken Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

/* Dark Mode - Dark Blue Theme */
[data-theme="dark"] {
    --surface: #0a1628;
    --surface-dim: #050b14;
    --surface-bright: #0f1e35;
    --surface-container-lowest: #06091a;
    --surface-container-low: #0d1a2e;
    --surface-container: #101f38;
    --surface-container-high: #152844;
    --surface-container-highest: #1a2f4f;
    --on-surface: #e0e8f5;
    --on-surface-variant: #b8c8e0;
    --inverse-surface: #d4e1f5;
    --inverse-on-surface: #0f1e35;

    --outline: #6b7a94;
    --outline-variant: #2a3f5f;

    --primary: #7ea3ff;
    --on-primary: #00174b;
    --primary-container: #003d99;
    --on-primary-container: #d4e1ff;

    --secondary: #c41e3a;
    --on-secondary: #ffffff;
    --secondary-container: #8a0020;
    --on-secondary-container: #ffd6d5;

    --tertiary: #ffb59e;
    --on-tertiary: #552000;
    --tertiary-container: #802a0b;
    --on-tertiary-container: #ffdbd0;

    --background: #0a1628;
    --on-background: #e0e8f5;
    --surface-variant: #2a3f5f;

    --deep-void: #7ea3ff;
    --glass-highlight: rgba(126, 163, 255, 0.15);

    /* Dark Mode Glass Effects - Blue Tinted */
    --glass-bg: rgba(15, 30, 53, 0.75);
    --glass-border: rgba(126, 163, 255, 0.2);
    --glass-shadow: rgba(0, 11, 36, 0.6);
    --glass-blur: 30px;
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background: var(--background);
    color: var(--on-background);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
}

/* Glass Surface Component */
.glass-surface {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1.5px solid var(--glass-border);
    border-radius: var(--rounded-xl);
    box-shadow:
        0 20px 40px var(--glass-shadow),
        inset 0 1px 0 var(--glass-highlight);
    position: relative;
    overflow: hidden;
}

.glass-surface::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 0% 0%, rgba(0, 51, 141, 0.35) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.glass-surface > * {
    position: relative;
    z-index: 1;
}

.glass-surface-sm {
    background: var(--glass-bg);
    backdrop-filter: blur(calc(var(--glass-blur) * 0.75));
    -webkit-backdrop-filter: blur(calc(var(--glass-blur) * 0.75));
    border: 1px solid var(--glass-border);
    border-radius: var(--rounded-lg);
    box-shadow: 0 10px 20px var(--glass-shadow);
}

/* Typography Classes */
.headline-xl {
    font-family: var(--font-headline);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
}

.headline-lg {
    font-family: var(--font-headline);
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.headline-md {
    font-family: var(--font-headline);
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.body-lg {
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 400;
    line-height: 1.6;
}

.body-md {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
}

.label-md {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.label-sm {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* Button Styles */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-container));
    color: var(--on-primary);
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--rounded-full);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--glass-shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--glass-shadow);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    color: var(--primary);
    border: 1px solid var(--glass-border);
    padding: 1rem 2rem;
    border-radius: var(--rounded-full);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    backdrop-filter: blur(calc(var(--glass-blur) * 1.5));
    -webkit-backdrop-filter: blur(calc(var(--glass-blur) * 1.5));
    border-color: var(--primary);
}

/* Card Component */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1.5px solid var(--glass-border);
    border-radius: var(--rounded-xl);
    padding: 2rem;
    box-shadow:
        0 20px 40px var(--glass-shadow),
        inset 0 1px 0 var(--glass-highlight);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 0% 0%, rgba(0, 51, 141, 0.7) 0%, rgba(0, 51, 141, 0.2) 35%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

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

.card:hover {
    transform: translateY(-4px);
    box-shadow:
        0 28px 56px var(--glass-shadow),
        inset 0 1px 0 var(--glass-highlight);
}

.card:hover::before {
    background: radial-gradient(circle at 0% 0%, rgba(0, 51, 141, 0.45) 0%, transparent 50%);
}

/* Input Fields */
.input-field {
    background: var(--surface-container-low);
    border: 1px solid var(--outline-variant);
    border-radius: var(--rounded);
    padding: 0.75rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--on-surface);
    width: 100%;
    transition: all 0.2s ease;
    box-shadow:
        inset 4px 4px 8px rgba(0, 0, 0, 0.05),
        inset -4px -4px 8px rgba(255, 255, 255, 0.05);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow:
        0 0 0 2px var(--primary-container),
        inset 2px 2px 4px rgba(0, 0, 0, 0.05);
}

/* Status Badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--rounded-full);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.badge-live {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-container));
    color: var(--on-secondary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.02); }
}

/* Container Layouts */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--margin-mobile);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--gutter);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--margin-desktop);
    }
}

/* Responsive Grid */
.grid {
    display: grid;
    gap: var(--gutter);
}

.grid-2 {
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-3 {
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Utility Classes */
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-on-surface { color: var(--on-surface); }
.text-on-surface-variant { color: var(--on-surface-variant); }

.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-surface { background-color: var(--surface); }

/* Smooth Transitions */
* {
    transition-property: background-color, border-color, color, fill, stroke;
    transition-duration: 200ms;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}