/* Quantumcart Design System - Tech/Smart Theme */
:root {
    /* Colors */
    --bg-dark: #0a0a0a;
    --bg-card: #121212;
    --bg-card-hover: #1a1a1a;

    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #525252;

    --accent-primary: #3b82f6;
    /* Electric Blue */
    --accent-secondary: #8b5cf6;
    /* Neon Purple */
    --accent-glow: rgba(59, 130, 246, 0.5);

    --border-color: #262626;
    --border-hover: #404040;

    --success: #10b981;
    --error: #ef4444;

    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Spacing */
    --container-width: 1200px;
    --header-height: 80px;

    /* Animations */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    color: var(--text-secondary);
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

.gap-4 {
    gap: 2rem;
}

.grid {
    display: grid;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-medium);
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
}

.section {
    padding: 80px 0;
}

/* Header */
header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Animations included in style.css for now */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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