:root {
    --emerald: #00ff88;
    --bg: #000000;
    --card: #16181c;
    --border: #2f3336;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, sans-serif; }
body { background: var(--bg); color: #fff; height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }

.auth-container { width: 100%; max-width: 400px; padding: 20px; }
.auth-box { background: var(--card); padding: 35px; border-radius: 24px; border: 1px solid var(--border); text-align: center; }

.brand { font-size: 32px; font-weight: 900; color: var(--emerald); margin-bottom: 5px; }
.brand span { color: #fff; font-weight: 300; }
.subtitle { color: #71767b; font-size: 14px; margin-bottom: 25px; }

.tabs { display: flex; background: #000; border-radius: 12px; margin-bottom: 20px; padding: 4px; }
.tabs button { flex: 1; padding: 10px; border: none; background: transparent; color: #71767b; cursor: pointer; border-radius: 8px; font-weight: 600; }
.tabs button.active { background: var(--card); color: var(--emerald); }

.input-group { position: relative; margin-bottom: 12px; }
.input-group i { position: absolute; left: 15px; top: 15px; color: #71767b; }
.input-group input { width: 100%; background: #000; border: 1px solid var(--border); padding: 15px 15px 15px 45px; border-radius: 12px; color: #fff; outline: none; transition: 0.2s; }
.input-group input:focus { border-color: var(--emerald); box-shadow: 0 0 10px rgba(0, 255, 136, 0.2); }

.glow-btn { width: 100%; padding: 15px; background: var(--emerald); color: #000; border: none; border-radius: 12px; font-weight: 800; cursor: pointer; transition: 0.3s; margin-top: 10px; }

.divider { margin: 20px 0; border-top: 1px solid var(--border); position: relative; }
.divider span { position: absolute; top: -10px; left: 50%; transform: translateX(-50%); background: var(--card); padding: 0 10px; color: #71767b; font-size: 12px; }

.google-btn { width: 100%; padding: 12px; background: #fff; color: #000; border: none; border-radius: 12px; font-weight: 700; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 10px; }

.fa-spin { animation: spin 1s infinite linear; }
@keyframes spin { 100% { transform: rotate(360deg); } }