:root {
    --bg-body: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-hover: #334155;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --radius: 16px;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
    --font-main: 'Space Grotesk', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
}

/* Header & Nav */
.topbar, .site-header {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.brand {
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--text-main);
    font-size: 1.5rem;
}

.brand-accent {
    color: var(--primary);
}

.nav-link, .nav-item a, .nav-secondary {
    color: var(--text-muted) !important;
    transition: all 0.2s ease;
    font-weight: 500;
}

.nav-link:hover, .nav-item a:hover, .nav-secondary:hover {
    color: var(--primary) !important;
}

/* Buttons */
.btn {
    border-radius: var(--radius);
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
}

.btn.primary, .btn-link {
    background: var(--primary);
    color: white !important;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn.primary:hover, .btn-link:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
}

.btn.secondary, .btn.ghost {
    background: var(--bg-surface);
    color: var(--text-main);
    border: 1px solid var(--border);
}

.btn.secondary:hover, .btn.ghost:hover {
    background: var(--bg-surface-hover);
    border-color: var(--text-muted);
    transform: translateY(-1px);
}

/* Cards */
.card, .bilinc-card, .tool-card, .update-card, .forum-post {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all 0.3s ease;
}

.card:hover, .bilinc-card:hover, .tool-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

/* Mega Menu */
.mega-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

.mega-col h4 {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.mega-item {
    color: var(--text-main) !important;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: background 0.2s;
}

.mega-item:hover {
    background: var(--bg-surface-hover);
    color: var(--primary) !important;
}

/* Hero Section */
.hero h1 {
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    letter-spacing: -0.03em;
}

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

/* Inputs */
input, textarea, select, .text-input {
    background: var(--bg-body) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-main) !important;
    border-radius: 8px;
    padding: 0.75rem;
    transition: border-color 0.2s;
}

input:focus, textarea:focus, select:focus, .text-input:focus {
    outline: none;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    background: var(--bg-body);
    color: var(--text-muted);
}