.main {
    display: flex;
    flex-direction: row;
    height: calc(100vh - 74px);
}

/* Left panel - vehicle list */
.main-left {
    width: 260px;
    border-right: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    background: #fafafa;
    flex-shrink: 0;
}

.vehicle-list-header {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-bottom: 1px solid #e0e0e0;
}

.vehicle-add-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.vehicle-add-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(102, 126, 234, 0.4);
}

.vehicle-search {
    padding: 7px 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 13px;
}

.vehicle-search:focus {
    outline: none;
    border-color: #667eea;
}

/* Vehicle list */
.vehicle-list {
    flex: 1;
    overflow-y: auto;
}

.vehicle-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    cursor: pointer;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.15s;
}

.vehicle-list-item:hover {
    background: #f0f0ff;
}

.vehicle-list-item--active {
    background: #e8eaff;
    border-left: 3px solid #667eea;
}

.vehicle-list-number {
    font-weight: 600;
    font-size: 14px;
    color: #333;
}

.vehicle-list-weight {
    font-size: 12px;
    color: #888;
}

.vehicle-list-empty {
    padding: 20px;
    text-align: center;
    color: #999;
    font-size: 13px;
}

/* Right panel */
.main-right {
    flex: 1;
    overflow-y: auto;
    background: white;
}

.main-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #999;
    font-size: 16px;
}

.vehicle-detail {
    padding: 24px;
    max-width: 700px;
}

.vehicle-detail-title {
    margin: 0 0 20px 0;
    font-size: 24px;
    color: #333;
    font-weight: 700;
}

.vehicle-error {
    background-color: #fee;
    color: #c33;
    padding: 10px 14px;
    border-radius: 6px;
    border: 1px solid #fcc;
    font-size: 13px;
    margin-bottom: 14px;
}

/* Current reading */
.reading-display {
    margin-bottom: 20px;
    padding: 16px;
    background: #f8f8fc;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.reading-display label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.reading-value {
    font-size: 32px;
    font-weight: 700;
    color: #667eea;
    font-family: 'Courier New', monospace;
}

.reading-value--disconnected {
    color: #ccc;
    font-size: 18px;
}

/* Weighing cards */
.weighing-section {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.weight-card {
    flex: 1;
    min-width: 160px;
    padding: 16px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background: white;
}

.weight-card--net {
    background: #f0fff0;
    border-color: #b2dfb2;
}

.weight-card-header {
    font-size: 12px;
    font-weight: 600;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.weight-card--net .weight-card-header {
    color: #2e7d32;
}

.weight-card-value {
    font-size: 22px;
    font-weight: 700;
    color: #333;
    margin-bottom: 4px;
    font-family: 'Courier New', monospace;
}

.weight-card--net .weight-card-value {
    color: #2e7d32;
}

.weight-card-meta {
    font-size: 11px;
    color: #999;
    margin-bottom: 10px;
}

.weight-set-btn {
    width: 100%;
    padding: 8px 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 6px;
}

.weight-set-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(102, 126, 234, 0.4);
}

.weight-set-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Extra fields section */
.extra-section {
    border-top: 1px solid #e0e0e0;
    padding-top: 20px;
}

.extra-section h3 {
    margin: 0 0 14px 0;
    font-size: 14px;
    color: #667eea;
    font-weight: 600;
}

.extra-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 14px;
}

.extra-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.extra-field label {
    font-size: 12px;
    font-weight: 600;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.extra-field input[type="text"],
.extra-field input[type="number"],
.extra-field select {
    padding: 7px 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.extra-field input:focus,
.extra-field select:focus {
    outline: none;
    border-color: #667eea;
}

.extra-field input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.extra-save-btn {
    padding: 8px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.extra-save-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(102, 126, 234, 0.4);
}

.extra-save-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Vehicle form sections */
.vehicle-form-section {
    margin-bottom: 20px;
}

.vehicle-form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #e0e0e0;
}

.vehicle-form-cancel {
    padding: 8px 20px;
    background: white;
    color: #666;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.vehicle-form-cancel:hover:not(:disabled) {
    background: #f5f5f5;
    border-color: #ccc;
}

.vehicle-form-cancel:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 768px) {
    .main {
        flex-direction: column;
        height: auto;
    }

    .main-left {
        width: 100%;
        max-height: 250px;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
    }

    .weighing-section {
        flex-direction: column;
    }

    .extra-fields {
        grid-template-columns: 1fr;
    }
}