:root {
    --bg-dark: #0f172a;       /* Slate 900 */
    --surface: #1e293b;       /* Slate 800 */
    --border: #334155;        /* Slate 700 */
    --text-main: #f8fafc;     /* Slate 50 */
    --text-muted: #94a3b8;    /* Slate 400 */
    --accent: #0ea5e9;        /* Sky 500 */
    --accent-hover: #0284c7;  /* Sky 600 */
}

* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

/* --- NAVIGATION --- */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent);
    font-weight: 400;
}

/* --- BUTTONS --- */
.btn {
    background-color: var(--accent);
    color: #0f172a;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: var(--accent-hover);
}

.btn-outline {
    background-color: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-outline:hover {
    background-color: rgba(14, 165, 233, 0.1);
}

/* --- LAYOUT SHELL --- */
section {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    padding: 120px 20px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px auto;
}
/* --- FEATURE CARDS --- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: var(--surface);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: transform 0.3s ease, border-color 0.3s ease;
    text-align: left;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
}

.feature-card h3 {
    margin-top: 0;
    font-size: 1.4rem;
    color: var(--text-main);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 0;
}
/* --- PRICING CARDS --- */
.pricing-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
    flex-wrap: wrap;
}

.pricing-card {
    background-color: var(--bg-dark);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    flex: 1;
    min-width: 300px;
    max-width: 400px;
    position: relative;
    overflow: hidden;
}

.pricing-card.premium {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.15);
}

.pricing-badge {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--accent);
    color: #0f172a;
    font-weight: bold;
    font-size: 0.85rem;
    padding: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-main);
    margin: 20px 0 10px 0;
}

.price span {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: normal;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 30px 0;
    text-align: left;
}

.pricing-features li {
    margin-bottom: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: flex-start;
    gap: 10px;
}