:root {
    /* Primary Color Palette (Physico Brand) */
    --primary: #F97316; /* Orange */
    --primary-hover: #EA580C;
    --primary-soft: rgba(249, 115, 22, 0.1);

    /* Neutral Colors / Dark Mode Theme */
    --bg-main: #0F172A;
    --bg-darker: #020617;
    --bg-card: #1E293B;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --border: #334155;

    /* Semantic Colors */
    --success: #10B981;
    --error: #EF4444;

    /* Spacing & Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --container-max: 1200px;

    /* Shadow */
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);

    /* Animation */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    color: var(--text-main);
    line-height: 1.2;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, #FB923C 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Glassmorphism & Cards */
.glass {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow);
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 32px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

/* Section Header */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Footer Refs */
.footnote {
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.6;
    margin-top: 8px;
}

/* Utils */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    .grid-3 {
        gap: 16px;
    }
    section {
        padding: 60px 0;
    }
    .section-header h2 {
        font-size: 2rem;
    }
    
    /* Inline overrides for index.html grids */
    .container[style*="grid-template-columns"], 
    div[style*="grid-template-columns: 1fr 1.5fr"],
    div[style*="grid-template-columns: 1fr 1fr"],
    div[style*="grid-template-columns: 2fr 1fr"] {
        grid-template-columns: 1fr !important;
        gap: 30px !important;
    }
    
    footer div[style*="text-align: right"] {
        text-align: left !important;
    }
}