:root {
    --bg-start: #0f172a;
    --bg-end: #1e293b;
    --panel: #ffffff;
    --text: #0f172a;
    --muted: #475569;
    --accent: #0f766e;
    --accent-hover: #115e59;
    --danger: #b91c1c;
    --danger-bg: #fef2f2;
    --ring: rgba(15, 118, 110, 0.35);
    --home-bg: #f5f5f5;
    --home-border: #6b4;
}

* {
    box-sizing: border-box;
}

.home-body {
    font-family: system-ui, -apple-system, sans-serif;
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background: var(--home-bg);
}

.home-container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.home-container h1 {
    color: #333;
    border-bottom: 3px solid var(--home-border);
    padding-bottom: 10px;
}

.home-container code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: monospace;
}

.home-info {
    color: #666;
    margin-top: 20px;
}

.home-time {
    color: var(--home-border);
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: flex-end;
    margin-bottom: 16px;
}

.nav a,
.nav button {
    border: 1px solid #d1d5db;
    background: #fff;
    color: #334155;
    border-radius: 8px;
    padding: 7px 12px;
    text-decoration: none;
    font-size: 0.88rem;
    cursor: pointer;
}

.nav a:hover,
.nav button:hover {
    background: #f8fafc;
}

.nav form {
    margin: 0;
}

.login-body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 20% 20%, rgba(45, 212, 191, 0.15), transparent 45%),
        radial-gradient(circle at 80% 10%, rgba(56, 189, 248, 0.12), transparent 40%),
        linear-gradient(165deg, var(--bg-start), var(--bg-end));
    padding: 24px;
}

.login-panel {
    width: min(420px, 100%);
    background: var(--panel);
    border-radius: 18px;
    padding: 30px;
    box-shadow: 0 18px 60px rgba(2, 6, 23, 0.35);
    animation: appear 220ms ease-out;
}

.login-panel h1 {
    margin: 0 0 8px;
    font-size: 1.55rem;
    letter-spacing: -0.01em;
}

.login-subtitle {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.45;
}

.alert {
    margin-bottom: 16px;
    border: 1px solid #fecaca;
    background: var(--danger-bg);
    color: var(--danger);
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 0.9rem;
}

.login-form label {
    display: block;
    margin: 0 0 6px;
    font-size: 0.86rem;
    font-weight: 600;
    color: #334155;
}

.login-form input {
    width: 100%;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    padding: 11px 12px;
    margin: 0 0 14px;
    font-size: 0.95rem;
    transition: border-color 120ms ease, box-shadow 120ms ease;
}

.login-form input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--ring);
}

.login-form button {
    width: 100%;
    border: 0;
    border-radius: 10px;
    padding: 12px;
    font-size: 0.96rem;
    font-weight: 700;
    color: white;
    background: var(--accent);
    cursor: pointer;
    transition: background 120ms ease, transform 120ms ease;
}

.login-form button:hover {
    background: var(--accent-hover);
}

.login-form button:active {
    transform: translateY(1px);
}

.foot {
    margin-top: 14px;
    color: #64748b;
    font-size: 0.8rem;
    text-align: center;
}

@keyframes appear {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}