/* ==========================================================================
   SENTINEL LANDING PAGE - CYBERPUNK THEME
   ========================================================================== */

:root {
    --primary: #0066CC;
    --accent-cyan: #00E5FF;
    --accent-pink: #FF0080;
    --bg-dark: #0D1117;
    --bg-darker: #010409;
    --surface: #161B22;
    --text-primary: #E6EDF3;
    --text-secondary: #8B949E;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    overflow-x: hidden;
}

.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a237e 0%, var(--bg-darker) 70%);
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
                      linear-gradient(90(rgba(0, 229, 255, 0.05) 1px, transparent 1px));
    background-size: 50px 50px;
    pointer-events: none;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2rem;
}

.pricing {
    padding: 100px 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.card {
    background: var(--surface);
    border: 1px solid #30363d;
    border-radius: 20px;
    padding: 40px;
    width: 350px;
    transition: transform 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-cyan);
}

.card.featured {
    border-color: var(--accent-pink);
    box-shadow: 0 0 20px rgba(255, 0, 128, 0.2);
}

.card.featured::before {
    content: 'RECOMMENDED';
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--accent-pink);
    color: white;
    padding: 5px 40px;
    font-size: 0.7rem;
    font-weight: bold;
    transform: rotate(45deg);
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin: 20px 0;
}

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

.features {
    list-style: none;
    padding: 0;
    margin: 30px 0;
    text-align: left;
    flex-grow: 1;
}

.features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.features li::before {
    content: '✓';
    color: var(--accent-cyan);
    font-weight: bold;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    width: 100%;
    box-sizing: border-box;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
    color: white;
}

.btn-featured {
    background: linear-gradient(135deg, var(--accent-pink), #bf00ff);
    color: white;
}

.btn:hover {
    filter: brightness(1.2);
    box-shadow: 0 0 15px rgba(0, 229, 255, 0.4);
}

.btn-success {
    background: #00c853;
    color: white;
    margin-bottom: 10px;
}

.btn-fail {
    background: #ff1744;
    color: white;
}

.sandbox-container {
    max-width: 400px;
    margin: 50px auto;
    text-align: center;
    background: var(--surface);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--accent-cyan);
}