/* Form Styles */
.log-form {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 2rem;
}

.form-section {
    margin-bottom: 2rem;
}

.form-section:last-child {
    margin-bottom: 0;
}

.form-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
    color: var(--primary-color);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--surface-color);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group input[type="date"],
.form-group input[type="number"] {
    cursor: pointer;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 0.75rem;
}

/* Intervals Container */
.intervals-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.interval-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.25rem;
    position: relative;
    transition: var(--transition);
}

.interval-item:hover {
    border-color: var(--primary-color);
}

.interval-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.interval-title {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.875rem;
}

.interval-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-interval {
    padding: 0.375rem 0.75rem;
    border: none;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.btn-interval:hover {
    background: var(--border-color);
}

.btn-interval.delete {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-interval.delete:hover {
    background: var(--danger-color);
    color: white;
}

.interval-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Lithology Color Input */
.color-input-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.color-input-group input[type="color"] {
    width: 50px;
    height: 38px;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    padding: 2px;
}

.color-input-group input[type="text"] {
    flex: 1;
}

/* Lithology Suggestions */
.lithology-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    margin-top: 0.25rem;
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    box-shadow: var(--shadow-md);
}

.lithology-suggestion {
    padding: 0.625rem 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.lithology-suggestion:hover {
    background: var(--bg-color);
}

.lithology-suggestion.selected {
    background: var(--primary-color);
    color: white;
}

/* Input Validation */
.form-group input:invalid:not(:focus),
.form-group select:invalid:not(:focus) {
    border-color: var(--danger-color);
}

.form-group input:valid:not(:placeholder-shown),
.form-group select:valid {
    border-color: var(--success-color);
}

/* Disabled State */
.form-group input:disabled,
.form-group select:disabled,
.form-group textarea:disabled {
    background: var(--bg-color);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Required Fields */
.form-group label::after {
    content: '';
}

.form-group.required label::after {
    content: ' *';
    color: var(--danger-color);
}

/* Helper Text */
.helper-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.helper-text.error {
    color: var(--danger-color);
}

/* Loading State */
.form-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 32px;
    height: 32px;
    margin: -16px 0 0 -16px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Collapsible Sections */
.form-section.collapsible .form-section-title {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.form-section.collapsible .form-section-title::after {
    content: '▼';
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-section.collapsible.collapsed .form-section-title::after {
    transform: rotate(-90deg);
}

.form-section.collapsible.collapsed .form-grid,
.form-section.collapsible.collapsed .intervals-container {
    display: none;
}

/* Responsive Form */
@media (max-width: 768px) {
    .log-form {
        padding: 1rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .interval-grid {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions button {
        width: 100%;
    }
}

/* Autocomplete Styling */
.autocomplete-container {
    position: relative;
}

.autocomplete-input {
    width: 100%;
}

.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 0.5rem 0.5rem;
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.autocomplete-item {
    padding: 0.625rem 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.autocomplete-item:hover {
    background: var(--bg-color);
}

.autocomplete-item.highlighted {
    background: var(--primary-color);
    color: white;
}

/* File Upload Area */
.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload-area:hover,
.file-upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.file-upload-area svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.file-upload-area p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Checkbox and Radio Styling */
.form-group input[type="checkbox"],
.form-group input[type="radio"] {
    width: auto;
    margin-right: 0.5rem;
    cursor: pointer;
}

.form-group.checkbox-group,
.form-group.radio-group {
    flex-direction: row;
    align-items: center;
}

.checkbox-list,
.radio-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    cursor: pointer;
}

/* Switch Toggle */
.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

.switch input:checked + .slider {
    background-color: var(--primary-color);
}

.switch input:checked + .slider:before {
    transform: translateX(24px);
}