:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #a1a1a1;
    --accent: #ffffff;
    --border: #262626;
    --danger: #ff4d4f;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Nav */
nav {
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 10%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(12px);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    color: #fff;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    margin-left: 2rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #fff;
}

/* Hero */
.hero {
    padding: 120px 10% 80px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 1.5rem;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

/* Features Grid */
.section {
    padding: 100px 10%;
    border-bottom: 1px solid var(--border);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    padding: 2.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: border-color 0.2s;
}

.feature-card:hover {
    border-color: #404040;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

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

/* Account Deletion Area - Modern & Serious */
.deletion-box {
    max-width: 600px;
    margin: 0 auto;
    padding: 3rem;
    background: #0f0f0f;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.deletion-box h2 {
    color: var(--danger);
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input, .form-group textarea {
    width: 100%;
    background: #000;
    border: 1px solid var(--border);
    padding: 1rem;
    color: #fff;
    border-radius: 8px;
    font-size: 1rem;
}

.btn-delete {
    width: 100%;
    padding: 1rem;
    background: #fff;
    color: #000;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-delete:hover {
    opacity: 0.9;
}

/* Footer */
footer {
    padding: 60px 10%;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-nav {
    margin-bottom: 2rem;
}

.footer-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin: 0 1rem;
}

.play-store-btn {
    display: inline-block;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    width: 200px;
    margin-top: 1rem;
}

.play-store-btn:hover {
    transform: scale(1.05);
}

.play-store-btn img {
    width: 100%;
    border-radius: 8px;
}

@media (max-width: 900px) {
    .grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 3rem; }
}