:root {
    --bg: #0b1220;
    --card-bg: #121a2b;
    --accent: #4f8cff;
    --accent-2: #7c5cff;
    --text: #e8ecf7;
    --muted: #8a93a8;
    --error: #ff5d5d;
    --radius: 16px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: radial-gradient(circle at 20% 20%, #1a2540 0%, var(--bg) 60%);
    color: var(--text);
}

.login-wrap {
    width: 100%;
    padding: 16px;
    display: flex;
    justify-content: center;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: rgba(18, 26, 43, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.login-card h1 {
    margin: 0 0 4px;
    font-size: 24px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subtitle {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 14px;
}

.login-card label {
    display: block;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 14px;
}

.login-card input {
    width: 100%;
    margin-top: 6px;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    font-size: 15px;
    transition: border-color 0.2s;
}

.login-card input:focus {
    outline: none;
    border-color: var(--accent);
}

.login-card button {
    width: 100%;
    margin-top: 8px;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}

.login-card button:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(79, 140, 255, 0.35);
}

.alert-error {
    background: rgba(255, 93, 93, 0.12);
    border: 1px solid rgba(255, 93, 93, 0.4);
    color: var(--error);
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
}

@media (max-width: 420px) {
    .login-card { padding: 24px 20px; }
}