:root {
    --bg: #0b0f19;
    --card: #161b28;
    --primary: #3b82f6;
    --border: #1e293b;
    --text: #ffffff;
    --muted: #94a3b8;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }

body.auth-bg {
    background-color: var(--bg);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
}

.auth-container { width: 100%; max-width: 400px; padding: 20px; }

.auth-card {
    background: var(--card);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.auth-header { text-align: center; margin-bottom: 30px; }

.logo { font-size: 1.8rem; font-weight: 800; margin-bottom: 10px; }
.logo span { color: var(--primary); }
.auth-header p { color: var(--muted); font-size: 0.9rem; }

.auth-form .input-group { margin-bottom: 20px; }

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--muted);
}

.input-group label i { margin-right: 5px; color: var(--primary); }

.input-group input {
    width: 100%;
    padding: 12px 15px;
    background: #0b0f19;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: white;
    outline: none;
    transition: 0.3s;
}

.input-group input:focus { border-color: var(--primary); box-shadow: 0 0 10px rgba(59, 130, 246, 0.2); }

.btn-auth {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.btn-auth:hover { transform: translateY(-2px); opacity: 0.9; }

.auth-footer { text-align: center; margin-top: 25px; font-size: 0.85rem; color: var(--muted); }
.auth-footer a { color: var(--primary); text-decoration: none; font-weight: 600; }
.auth-footer a:hover { text-decoration: underline; }

.back-home { display: inline-block; margin-top: 15px; color: var(--muted) !important; font-weight: normal !important; }