:root {
    --bg: #0f172a;
    --card: #1e293b;
    --border: #334155;
    --text: #f8fafc;
    --muted: #94a3b8;
    --accent: #c9a227;
    --accent-hover: #dbb94a;
    --danger: #f87171;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: radial-gradient(circle at top, #1e3a5f 0%, var(--bg) 55%);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.card {
    width: 100%;
    max-width: 420px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.brand {
    text-align: center;
    margin-bottom: 1.75rem;
}

.brand h1 {
    margin: 0 0 0.35rem;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.brand p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    color: var(--muted);
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem 0.9rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #0f172a;
    color: var(--text);
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.2);
}

button,
.btn {
    display: inline-block;
    width: 100%;
    padding: 0.8rem 1rem;
    border: none;
    border-radius: 10px;
    background: var(--accent);
    color: #1a1a1a;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
}

button:hover,
.btn:hover {
    background: var(--accent-hover);
}

.error {
    margin-bottom: 1rem;
    padding: 0.75rem 0.9rem;
    border-radius: 10px;
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.35);
    color: var(--danger);
    font-size: 0.92rem;
}

.dashboard {
    max-width: 640px;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.dashboard-header h1 {
    margin: 0;
    font-size: 1.35rem;
}

.btn-secondary {
    width: auto;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.55rem 1rem;
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
}

.welcome {
    padding: 1.25rem;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid var(--border);
    color: var(--muted);
    line-height: 1.6;
}

.welcome strong {
    color: var(--text);
}