/* 
 * DESIGN SYSTEM & VARIABLES 
 * Premium Dark Mode Palette
 */
:root {
    --bg-body: #030712;
    /* Very dark blue/black */
    --bg-card: #111827;
    /* Dark gray/blue */
    --bg-card-hover: #1f2937;

    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --text-accent: #38bdf8;
    /* Sky blue */

    --primary: #6366f1;
    /* Indigo */
    --primary-hover: #4f46e5;
    --secondary: #ec4899;
    /* Pink */

    --gradient-main: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --gradient-text: linear-gradient(to right, #38bdf8, #818cf8, #c084fc);

    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;

    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

/* RESET & BASE */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

/* UTILITIES */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--gradient-main);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--text-accent);
    color: var(--text-accent);
}

/* HEADER */
header {
    padding: 24px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-main);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* HERO SECTION */
.hero {
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(3, 7, 18, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 48px;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* PRODUCTS SECTION */
.products {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-muted);
}

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

.card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 40px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-glow);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.card p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.card p:last-of-type {
    flex-grow: 1;
}

.card-link {
    color: var(--text-accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
}

.card-link:hover {
    text-decoration: underline;
}

/* FOOTER */
footer {
    padding: 80px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand h4 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    max-width: 300px;
}

.footer-links h5 {
    font-size: 1rem;
    margin-bottom: 24px;
    color: white;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: var(--text-muted);
}

.footer-links ul li a:hover {
    color: var(--text-accent);
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }
}