:root {
    --bg-main: #0f172a;
    --accent-grad: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --danger: #ef4444;
    --success: #10b981;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    min-height: 100vh;
    padding-bottom: 80px;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 16px;
}

/* Header & Nav */
.app-header {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(15px);
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid var(--glass-border);
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.nav-btn.active { color: #4facfe; font-weight: bold; }

/* Floating Button */
.fab {
    position: fixed;
    bottom: 85px;
    right: 20px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-grad);
    border: none;
    color: white;
    font-size: 30px;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

/* Grid & Layout */
.view-section { padding: 0 20px; }
.card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.full-width { grid-column: span 2; }