:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --text: #172033;
    --muted: #667085;
    --border: #e4e7ec;
    --primary: #4f46e5;
    --danger: #b42318;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
}

a { color: inherit; text-decoration: none; }

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-card {
    width: 100%;
    max-width: 430px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 32px;
    box-shadow: 0 16px 50px rgba(16, 24, 40, .08);
}

.brand { text-align: center; margin-bottom: 28px; }

.brand-mark {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    margin: 0 auto 14px;
    border-radius: 14px;
    background: var(--primary);
    color: white;
    font-size: 22px;
    font-weight: 800;
}

.brand h1 { margin: 0 0 8px; font-size: 25px; }

.brand p, .muted {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.field { margin-bottom: 16px; }

.field label {
    display: block;
    margin-bottom: 7px;
    font-size: 13px;
    font-weight: 700;
}

.field input {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid #d0d5dd;
    border-radius: 10px;
    outline: none;
}

.field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}

.btn {
    width: 100%;
    padding: 13px;
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 700;
}

.btn-primary { background: var(--primary); color: white; }

.alert {
    padding: 11px 13px;
    border-radius: 9px;
    margin-bottom: 16px;
    font-size: 13px;
}

.alert-error {
    color: var(--danger);
    background: #fff1f2;
    border: 1px solid #fecdd3;
}

.topbar {
    min-height: 64px;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border-bottom: 1px solid var(--border);
}

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

.topbar a {
    color: var(--primary);
    font-weight: 700;
}

.dashboard {
    padding: 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.dashboard h1 { margin: 0 0 8px; }

.panel {
    margin-top: 24px;
    padding: 24px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.stat {
    padding: 22px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
}

.stat span {
    display: block;
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 8px;
}

.stat strong { font-size: 28px; }