:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --text: #172033;
    --muted: #677083;
    --line: #dfe5ef;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger-bg: #fee2e2;
    --danger-text: #991b1b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
}

a {
    color: inherit;
}

.login-page {
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-shell {
    width: min(100%, 430px);
}

.login-panel,
.empty-state,
.stat-card,
.hero {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.login-panel {
    padding: 32px;
    box-shadow: 0 24px 70px rgba(23, 32, 51, 0.08);
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 12px;
    font-size: clamp(28px, 5vw, 40px);
    line-height: 1.08;
}

h2 {
    margin-bottom: 8px;
}

.muted {
    color: var(--muted);
    line-height: 1.6;
}

.form {
    display: grid;
    gap: 10px;
    margin-top: 24px;
}

.form label {
    font-weight: 700;
}

.form input {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 0 14px;
    font-size: 16px;
}

.form button {
    min-height: 48px;
    margin-top: 10px;
    border: 0;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
}

.form button:hover {
    background: var(--primary-dark);
}

.alert {
    margin-top: 20px;
    border-radius: 8px;
    background: var(--danger-bg);
    color: var(--danger-text);
    padding: 12px 14px;
    font-weight: 700;
}

.notice {
    margin-top: 20px;
    border-radius: 8px;
    background: #dcfce7;
    color: #166534;
    padding: 12px 14px;
    font-weight: 700;
}

.notice a {
    color: #14532d;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 28px;
    background: #fff;
    border-bottom: 1px solid var(--line);
}

.topbar div,
.topbar nav {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar span {
    color: var(--muted);
}

.topbar a {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

.dashboard {
    width: min(1120px, calc(100% - 32px));
    margin: 32px auto;
}

.hero {
    padding: 28px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin: 16px 0;
}

.stat-card {
    padding: 20px;
}

.stat-card span {
    display: block;
    color: var(--muted);
}

.stat-card strong {
    display: block;
    margin-top: 8px;
    font-size: 34px;
}

.empty-state {
    padding: 24px;
}

@media (max-width: 720px) {
    .topbar,
    .topbar div,
    .topbar nav {
        align-items: flex-start;
        flex-direction: column;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}