:root {
    --bg-color: #0a0a0a;
    --card-bg: #161616;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #00ff99;
    --accent-glow: rgba(0, 255, 153, 0.2);
    --border: #333;
    --font-main: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 60px;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #888);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 16px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-color: var(--accent);
}

.card h3 {
    margin-bottom: 10px;
    font-size: 1.4rem;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.premium-section {
    position: relative;
    margin-top: 60px;
    border-radius: 20px;
    overflow: hidden;
    min-height: 400px;
    border: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(22, 22, 22, 0) 0%, rgba(22, 22, 22, 1) 100%);
}

.lock-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    text-align: center;
    padding: 20px;
    transition: opacity 0.5s ease;
}

.lock-content {
    max-width: 400px;
    background: #1a1a1a;
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.price-tag {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    margin: 20px 0;
}

.secure-note {
    margin-top: 15px;
    color: var(--text-secondary);
    opacity: 0.7;
}

.hidden-content {
    opacity: 0;
    pointer-events: none;
    padding: 40px;
    filter: blur(10px);
    transition: all 0.8s ease;
}

.premium-section.unlocked .lock-overlay {
    opacity: 0;
    pointer-events: none;
}

.premium-section.unlocked .hidden-content {
    opacity: 1;
    pointer-events: all;
    filter: blur(0);
}

.premium-header {
    text-align: center;
    margin-bottom: 40px;
}

.card.premium {
    border-color: var(--accent);
    background: linear-gradient(145deg, #161616 0%, #0f2a1f 100%);
}

.btn-download {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background: var(--accent);
    color: #000;
    text-decoration: none;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-download:hover {
    background: #00dd88;
}

footer {
    text-align: center;
    margin-top: 80px;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}