:root {
    --bg: #f5f7fa;
    --text: #1f2937;
    --panel: #ffffff;
    --line: #e5e7eb;
    --brand: #0f172a;
    --brand-soft: #1e293b;
    --ok: #16a34a;
    --danger: #dc2626;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, sans-serif;
    background: var(--bg);
    color: var(--text);
}

h1, h2, h3, p {
    margin: 0;
}

button, input, select {
    font: inherit;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

.form-group input,
.form-group select {
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
}

button {
    background: var(--brand);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 14px;
    cursor: pointer;
}

button:hover {
    background: var(--brand-soft);
}

.alert-error {
    margin-bottom: 14px;
    padding: 10px 12px;
    border-radius: 8px;
    background: #fee2e2;
    color: #991b1b;
}