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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #f5f7fa;
    color: #1a1a2e;
    line-height: 1.5;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

h1 {
    font-size: 1.8rem;
    margin-bottom: 0.25rem;
}

.subtitle {
    color: #666;
    margin-bottom: 2rem;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.hidden {
    display: none !important;
}

/* Error banner */
.error-banner {
    background: #fee;
    border: 1px solid #e55;
    color: #c33;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* Drop zone */
#drop-zone {
    border: 2px dashed #bbb;
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    background: #fff;
    transition: border-color 0.2s, background 0.2s;
    cursor: pointer;
}

#drop-zone.dragover {
    border-color: #3b82f6;
    background: #eff6ff;
}

.drop-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.drop-or {
    color: #999;
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

.drop-hint {
    color: #999;
    font-size: 0.8rem;
    margin-top: 0.75rem;
}

.file-btn {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: #3b82f6;
    color: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
}

.file-btn:hover {
    background: #2563eb;
}

.upload-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.gdrive-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.5rem;
    background: #fff;
    color: #333;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background 0.2s, border-color 0.2s;
}

.gdrive-btn:hover {
    background: #f5f5f5;
    border-color: #bbb;
}

.gdrive-btn svg {
    flex-shrink: 0;
}

/* Loading */
#loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e0e0e0;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 0.8s linear infinite;
}

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

/* Fieldsets */
fieldset {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    background: #fff;
}

legend {
    font-weight: 600;
    padding: 0 0.5rem;
    font-size: 0.95rem;
}

/* Form layout */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

.form-row {
    display: flex;
    gap: 0.75rem;
}

.form-row .field {
    flex: 1;
}

.field {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.5rem;
}

.field label {
    font-size: 0.8rem;
    color: #555;
    margin-bottom: 0.2rem;
}

.field input,
.field select {
    padding: 0.4rem 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
}

.field input:focus,
.field select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 700px) {
    .two-column {
        grid-template-columns: 1fr;
    }
}

/* Table */
.table-wrap {
    overflow-x: auto;
}

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

th {
    text-align: left;
    padding: 0.4rem 0.3rem;
    border-bottom: 2px solid #e0e0e0;
    font-size: 0.78rem;
    color: #666;
    white-space: nowrap;
}

td {
    padding: 0.3rem 0.2rem;
    border-bottom: 1px solid #eee;
}

td input {
    width: 100%;
    padding: 0.3rem 0.4rem;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-size: 0.85rem;
}

td input:focus {
    outline: none;
    border-color: #3b82f6;
}

td:first-child {
    width: 30px;
    text-align: center;
    color: #999;
}

.btn-remove {
    background: none;
    border: none;
    color: #e55;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.2rem 0.4rem;
}

.btn-remove:hover {
    color: #c33;
}

.btn-small {
    padding: 0.3rem 0.8rem;
    background: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.btn-small:hover {
    background: #e5e5e5;
}

/* Buttons */
.actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn-primary {
    padding: 0.65rem 2rem;
    background: #3b82f6;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: #2563eb;
}

.btn-edi {
    background: #059669;
}

.btn-edi:hover {
    background: #047857;
}

.btn-secondary {
    padding: 0.65rem 1.5rem;
    background: #fff;
    color: #333;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
}

.btn-secondary:hover {
    background: #f5f5f5;
}

/* Success */
.success-box {
    text-align: center;
    background: #fff;
    border-radius: 12px;
    padding: 3rem 2rem;
    border: 1px solid #e0e0e0;
}

.success-icon {
    width: 60px;
    height: 60px;
    background: #22c55e;
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.success-box h2 {
    margin-bottom: 1.5rem;
}

.success-box .btn-primary {
    margin-bottom: 0.75rem;
}

.success-box .btn-secondary {
    display: block;
    margin: 0 auto;
}