*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: #f0f2f5;
    color: #1a1a2e;
    padding: 24px 16px;
    min-height: 100vh;
}

.container {
    max-width: 880px;
    margin: 0 auto;
}

h1 {
    font-size: 1.55rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: #1a1a2e;
}

h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #333;
}

/* ---- Panel ---- */

.panel {
    background: #fff;
    border-radius: 10px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

/* ---- Field groups ---- */

.field-group {
    margin-bottom: 20px;
}

.field-label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 10px;
    color: #333;
}

/* ---- Radio cards ---- */

.radio-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.radio-option {
    cursor: pointer;
    flex: 1;
    min-width: 200px;
}

.radio-option input[type="radio"] { display: none; }

.radio-box {
    display: block;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 14px 16px;
    transition: border-color 0.15s, background 0.15s;
    height: 100%;
}

.radio-option:hover .radio-box { border-color: #a0b4d6; }

.radio-option input[type="radio"]:checked + .radio-box {
    border-color: #4a6fa5;
    background: #eef3fb;
}

.radio-box strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.radio-box small {
    color: #666;
    font-size: 0.78rem;
    word-break: break-all;
}

/* ---- Buttons ---- */

.btn {
    display: inline-flex;
    align-items: center;
    padding: 9px 20px;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
    white-space: nowrap;
}

.btn:hover { opacity: 0.84; }

.btn-primary  { background: #4a6fa5; color: #fff; }
.btn-secondary { background: #e8ecf0; color: #333; }

/* ---- Error / hint ---- */

.error-msg {
    color: #c0392b;
    font-size: 0.85rem;
    margin-top: 10px;
}

.hint {
    color: #888;
    font-size: 0.82rem;
    margin-top: 8px;
}

/* ---- Building panel ---- */

.building-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 48px 24px;
    gap: 16px;
    text-align: center;
}

.building-panel .building-msg {
    font-weight: 600;
    font-size: 1rem;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 5px solid #dde3ec;
    border-top-color: #4a6fa5;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
    flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Query panel ---- */

.query-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.search-row {
    display: flex;
    gap: 10px;
}

.search-input {
    flex: 1;
    padding: 9px 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.15s;
}

.search-input:focus { border-color: #4a6fa5; }

/* ---- Advanced SQL ---- */

.sql-details {
    margin: 16px 0 0;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 12px 14px;
}

.sql-details summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 0.84rem;
    color: #555;
    user-select: none;
}

.sql-details textarea {
    display: block;
    width: 100%;
    margin-top: 10px;
    padding: 10px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.83rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    resize: vertical;
    outline: none;
    transition: border-color 0.15s;
}

.sql-details textarea:focus { border-color: #4a6fa5; }

.sql-details .btn { margin-top: 8px; }

/* ---- Results ---- */

#results-area { margin-top: 20px; }

.table-wrap {
    overflow-x: auto;
    border-radius: 6px;
    border: 1px solid #e0e0e0;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.results-table th,
.results-table td {
    padding: 8px 12px;
    border-bottom: 1px solid #e8e8e8;
    text-align: left;
    vertical-align: top;
    max-width: 420px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.results-table th {
    background: #f5f7fa;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 2px solid #dde3ec;
}

.results-table tr:last-child td { border-bottom: none; }

.results-table tbody tr:hover td { background: #f9fbff; }

.row-count { margin-top: 8px; }

/* ---- File input ---- */

input[type="file"] { font-size: 0.86rem; }