:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #f4f5f7;
    --card-bg: #ffffff;
    --text: #1f2937;
    --border: #e5e7eb;
    --success: #16a34a;
    --error: #dc2626;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.topbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand { font-weight: 700; text-decoration: none; color: var(--text); font-size: 1.1rem; }

nav a {
    margin-left: 14px;
    text-decoration: none;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
}

.content { padding: 16px; max-width: 640px; margin: 0 auto; }

.card-grid {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.big-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 28px 16px;
    text-decoration: none;
    color: var(--text);
}

.big-card .icon { font-size: 2.2rem; margin-bottom: 8px; }
.big-card .label { font-weight: 700; font-size: 1.05rem; }
.big-card .sub { font-size: 0.85rem; color: #6b7280; margin-top: 4px; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-top: 16px;
}

#reader { width: 100%; border-radius: 12px; overflow: hidden; margin-top: 12px; }

.row { display: flex; gap: 8px; margin-top: 6px; }
.row input { flex: 1; }

input, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    margin-top: 4px;
    margin-bottom: 10px;
    background: #fff;
    color: var(--text);
}

label { font-size: 0.85rem; font-weight: 600; color: #4b5563; }

.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); }
.btn.secondary { background: #f3f4f6; }
.btn.small { padding: 4px 8px; font-size: 0.8rem; }

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 0.9rem;
}

th { background: #f9fafb; font-size: 0.8rem; text-transform: uppercase; color: #6b7280; }

.hint { color: #6b7280; font-size: 0.9rem; }
.success { color: var(--success); font-weight: 600; }
.error { color: var(--error); font-weight: 600; }
.back-link { display: inline-block; margin-bottom: 8px; color: var(--primary); text-decoration: none; font-size: 0.9rem; }

#candidates-table input { margin-bottom: 0; padding: 6px 8px; font-size: 0.85rem; }
#candidates-table td { padding: 6px 4px; }