*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root, [data-theme="dark"] {
    --bg-primary: #121212; --bg-secondary: #1a1a1a; --bg-card: #212121; --border: #333333;
    --text-primary: #e8e8e8; --text-secondary: #a0a0a0; --text-muted: #6b6b6b;
    --accent-green: #22c55e; --accent-green-dim: rgba(34, 197, 94, 0.15);
    --accent-red: #ef4444; --accent-red-dim: rgba(239, 68, 68, 0.15);
    --accent-blue: #3b82f6; --accent-blue-dim: rgba(59, 130, 246, 0.12);
    --accent-purple: #a855f7; --accent-gold: #f59e0b;
    --gradient-hero: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #a855f7 100%);
    --nav-bg: rgba(18,18,18,0.97);
    --bg: #121212; --bg2: #1a1a1a; --bg3: #212121;
    --text: #e8e8e8; --text2: #a0a0a0;
    --accent: #3b82f6; --accent2: #60a5fa; --green: #22c55e; --red: #ef4444; --gold: #f59e0b;
}
[data-theme="light"] {
    --bg-primary: #f5f5f5; --bg-secondary: #ffffff; --bg-card: #ffffff; --border: #e0e0e0;
    --text-primary: #1a1a1a; --text-secondary: #555555; --text-muted: #888888;
    --accent-green: #16a34a; --accent-green-dim: rgba(22, 163, 74, 0.12);
    --accent-red: #dc2626; --accent-red-dim: rgba(220, 38, 38, 0.12);
    --accent-blue: #2563eb; --accent-blue-dim: rgba(37, 99, 235, 0.1);
    --accent-purple: #9333ea; --accent-gold: #d97706;
    --gradient-hero: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #9333ea 100%);
    --nav-bg: rgba(255,255,255,0.97);
    --bg: #f5f5f5; --bg2: #ffffff; --bg3: #ffffff;
    --text: #1a1a1a; --text2: #555555;
    --accent: #2563eb; --accent2: #3b82f6; --green: #16a34a; --red: #dc2626; --gold: #d97706;
}
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--accent2); text-decoration: none; } a:hover { text-decoration: underline; }

.auth-bg { min-height: 100vh; display: flex; align-items: center; justify-content: center; gap: 3rem; padding: 2rem; background: radial-gradient(ellipse at 30% 20%, rgba(59,130,246,0.08) 0%, transparent 60%), radial-gradient(ellipse at 70% 80%, rgba(139,92,246,0.06) 0%, transparent 60%); }

.auth-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 16px; padding: 2.5rem; width: 100%; max-width: 440px; box-shadow: 0 25px 50px rgba(0,0,0,0.4); }
.auth-card h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.25rem; }
.auth-logo { display: block; text-align: center; font-size: 1.3rem; font-weight: 800; color: var(--text); margin-bottom: 1.5rem; text-decoration: none; }
.auth-logo span { color: var(--accent); }
.auth-subtitle { color: var(--text2); font-size: 0.85rem; margin-bottom: 1.5rem; }
.auth-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: var(--red); padding: 0.75rem 1rem; border-radius: 8px; font-size: 0.8rem; margin-bottom: 1rem; }

.auth-form { display: flex; flex-direction: column; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-group label { font-size: 0.78rem; font-weight: 600; color: var(--text2); }
.form-group input { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 0.7rem 0.9rem; color: var(--text); font-size: 0.9rem; transition: border 0.2s; outline: none; }
.form-group input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }
.form-row { display: flex; justify-content: space-between; align-items: center; }
.form-link { font-size: 0.78rem; color: var(--accent2); }
.checkbox-label { font-size: 0.78rem; color: var(--text2); display: flex; align-items: center; gap: 0.5rem; cursor: pointer; }
.checkbox-label input { accent-color: var(--accent); }

.btn-primary { background: var(--accent); color: #fff; border: none; border-radius: 8px; padding: 0.75rem; font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all 0.2s; margin-top: 0.5rem; }
.btn-primary:hover { background: var(--accent2); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-primary-sm { background: var(--accent); color: #fff; border: none; border-radius: 6px; padding: 0.45rem 1rem; font-size: 0.78rem; font-weight: 600; cursor: pointer; text-decoration: none; }

.auth-divider { text-align: center; margin: 1.25rem 0; position: relative; }
.auth-divider::before { content: ''; position: absolute; top: 50%; left: 0; right: 0; height: 1px; background: var(--border); }
.auth-divider span { background: var(--bg2); padding: 0 1rem; position: relative; color: var(--text2); font-size: 0.75rem; }
.auth-switch { text-align: center; font-size: 0.82rem; color: var(--text2); }

.auth-features { display: flex; flex-direction: column; gap: 1.25rem; max-width: 320px; }
.feature-item { display: flex; gap: 1rem; align-items: flex-start; }
.feature-icon { font-size: 1.5rem; flex-shrink: 0; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--bg3); border-radius: 12px; border: 1px solid var(--border); }
.feature-item strong { color: var(--text); font-size: 0.85rem; }
.feature-item div:last-child { font-size: 0.78rem; color: var(--text2); line-height: 1.5; }

.nav-tier { padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.65rem; font-weight: 700; }
.badge-green { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-blue { background: rgba(59,130,246,0.15); color: var(--accent2); }
.badge-gold { background: rgba(245,158,11,0.15); color: var(--gold); }
.nav-user { color: var(--text); font-weight: 600; font-size: 0.85rem; }
.nav-link { color: var(--text2); font-size: 0.82rem; }

@media (max-width: 800px) {
    .auth-bg { flex-direction: column; } .auth-features { flex-direction: row; flex-wrap: wrap; max-width: 440px; }
    .feature-item { flex: 1 1 45%; }
}