:root {
    --bg-dark: #090d16;
    --card-bg: rgba(22, 28, 45, 0.6);
    --neon-green: #4ade80;
    --neon-purple: #a855f7;
    --text-main: #ffffff;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }

body {
    background: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 25%, rgba(74, 222, 128, 0.15) 0%, transparent 45%),
        radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.18) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, #111827 0%, #070a10 100%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Nav */
header {
    max-width: 1200px; width: 100%; margin: 0 auto; padding: 2.5rem 2rem;
    display: flex; justify-content: space-between; align-items: center;
}
.logo { font-size: 1.5rem; font-weight: 800; text-decoration: none; color: #fff; }
.logo span { color: var(--neon-green); }
nav a { color: var(--text-muted); text-decoration: none; margin-left: 2rem; font-size: 0.95rem; transition: color 0.3s; }
nav a:hover, nav a.active { color: var(--neon-green); }

/* Main Content Containers */
.page-container { max-width: 1200px; width: 100%; margin: 0 auto; padding: 2rem; flex-grow: 1; }
h1.page-title { font-size: 3rem; margin-bottom: 2rem; text-align: center; }
h1.page-title span { background: linear-gradient(to right, var(--neon-green), var(--neon-purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

/* Grids & Cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.card {
    background: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 2rem; backdrop-filter: blur(10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}
.card.green-top { border-top: 4px solid var(--neon-green); }
.card.purple-top { border-top: 4px solid var(--neon-purple); }
.card.orange-top { border-top: 4px solid #ff6b00; }

.card h2, .card h3 { margin-bottom: 1rem; color: #fff; }
.card p { color: var(--text-muted); line-height: 1.6; margin-bottom: 1rem; }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-muted); font-size: 0.9rem; }
.form-control {
    width: 100%; padding: 1rem; background: #0d1321; border: 1px solid var(--border-color);
    border-radius: 8px; color: #fff; outline: none; transition: border-color 0.3s;
}
.form-control:focus { border-color: var(--neon-purple); }
.btn-primary {
    background: linear-gradient(135deg, #ff6b00, #e65c00); color: #fff; border: none;
    padding: 1rem 2rem; border-radius: 8px; font-weight: 700; cursor: pointer;
    width: 100%; transition: transform 0.2s; text-transform: uppercase;
}
.btn-primary:hover { transform: translateY(-2px); }

/* Admin Dashboard Tables */
.admin-table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.admin-table th, .admin-table td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--border-color); }
.admin-table th { color: var(--neon-green); font-weight: 600; }
.admin-table tr:hover td { background: rgba(255,255,255,0.02); }

footer { padding: 2.5rem; text-align: center; color: #334155; border-top: 1px solid rgba(255, 255, 255, 0.02); margin-top: 4rem; }