/* ==========================================================================
   Train Model Page Styles
   ========================================================================== */

.train-model-page {
    max-width: 900px;
    margin: 0 auto;
}

/* Page Header */
.page-header__left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-primary);
}

/* ==========================================================================
   Progress Steps
   ========================================================================== */

.train-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.train-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    opacity: 0.5;
    transition: all var(--transition-base);
}

.train-step.active {
    opacity: 1;
}

.train-step.completed {
    opacity: 1;
}

.train-step__number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: var(--color-surface-light);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    transition: all var(--transition-base);
}

.train-step.active .train-step__number {
    background: var(--color-primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-glow-sm);
}

.train-step.completed .train-step__number {
    background-color: var(--color-success);
    border-color: transparent;
    color: white;
}

.train-step__info {
    display: flex;
    flex-direction: column;
}

.train-step__title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

.train-step__desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.train-step.active .train-step__title {
    color: var(--color-primary);
}

.train-step__connector {
    flex: 1;
    height: 2px;
    max-width: 60px;
    background-color: var(--color-border);
    border-radius: 1px;
}

.train-step.completed + .train-step__connector {
    background-color: var(--color-success);
}

@media (max-width: 768px) {
    .train-steps {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .train-step__info {
        display: none;
    }

    .train-step__connector {
        display: none;
    }
}

/* ==========================================================================
   Train Panel (Step Content)
   ========================================================================== */

.train-panel {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    animation: panelFadeIn 0.3s ease-out;
}

@keyframes panelFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.train-panel__header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.train-panel__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--color-surface-light);
    border-radius: var(--radius-lg);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.train-panel__icon--primary {
    background: var(--color-primary-gradient);
    color: white;
}

.train-panel__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin: 0 0 var(--spacing-xs) 0;
}

.train-panel__subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

.train-panel__body {
    padding: var(--spacing-xl);
}

.train-panel__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface-light);
}

/* ==========================================================================
   Step 1: Model Name
   ========================================================================== */

.form-label--outside {
    display: block;
    margin-bottom: var(--spacing-sm);
}

.form-input--lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
}

.name-suggestions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.name-suggestions__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.name-suggestion {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-surface-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.name-suggestion:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ==========================================================================
   Step 2: Guidelines
   ========================================================================== */

.guidelines {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.guideline {
    background-color: var(--color-surface-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.guideline__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background-color var(--transition-fast);
}

.guideline__header:hover {
    background-color: var(--color-surface-hover);
}

.guideline__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.guideline__icon--warning {
    background-color: var(--color-warning-subtle);
    color: var(--color-warning);
}

.guideline__icon--danger {
    background-color: var(--color-error-subtle);
    color: var(--color-error);
}

.guideline__icon--info {
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
}

.guideline__icon--success {
    background-color: var(--color-success-subtle);
    color: var(--color-success);
}

.guideline__title {
    flex: 1;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

.guideline__chevron {
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.guideline.open .guideline__chevron {
    transform: rotate(180deg);
}

.guideline__content {
    display: none;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.guideline.open .guideline__content {
    display: block;
}

.guideline__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.guideline__list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-md) 0;
}

.guideline__list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.guideline__list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    margin-top: 7px;
    flex-shrink: 0;
}

.guideline__tip {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.guideline__tip svg {
    flex-shrink: 0;
    color: var(--color-info);
}

.guideline__highlight {
    padding: var(--spacing-md);
    background: var(--color-primary-subtle);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-style: italic;
}

/* Comparison Cards */
.guideline__comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.comparison-card {
    position: relative;
}

.comparison-card__image {
    aspect-ratio: 3/4;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--color-surface);
}

.comparison-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.comparison-card__image.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.comparison-card__image.placeholder::after {
    content: '📷';
    font-size: var(--font-size-3xl);
    opacity: 0.3;
}

.comparison-card__badge {
    position: absolute;
    bottom: var(--spacing-sm);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
}

.comparison-card--bad .comparison-card__badge {
    background-color: var(--color-error);
    color: white;
}

.comparison-card--good .comparison-card__badge {
    background-color: var(--color-success);
    color: white;
}

/* Variety Grid */
.variety-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.variety-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
}

.variety-item__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary-subtle);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    flex-shrink: 0;
}

.variety-item__content {
    display: flex;
    flex-direction: column;
}

.variety-item__content strong {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.variety-item__content span {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Pro Tips */
.pro-tips {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.pro-tip {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
}

.pro-tip__number {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    background: var(--color-primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.pro-tip__content {
    display: flex;
    flex-direction: column;
}

.pro-tip__content strong {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.pro-tip__content span {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.guidelines-checkbox {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Step 3: Upload Images
   ========================================================================== */

.sample-dataset-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-left: auto;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary-subtle);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.sample-dataset-link:hover {
    background-color: var(--color-primary);
    color: white;
}

.training-upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.training-upload-zone:hover,
.training-upload-zone.dragover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-subtle);
}

.training-upload-zone__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.training-upload-zone__icon {
    color: var(--color-text-muted);
}

.training-upload-zone__text {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin: 0;
}

.training-upload-zone__hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin: 0;
}

/* Upload Stats */
.upload-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-surface-light);
    border-radius: var(--radius-lg);
}

.upload-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.upload-stat__value {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
}

.upload-stat__label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.upload-stat__divider {
    width: 1px;
    height: 40px;
    background-color: var(--color-border);
}

/* Upload Requirement */
.upload-requirement {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-warning-subtle);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-warning);
}

.upload-requirement.satisfied {
    background-color: var(--color-success-subtle);
    color: var(--color-success);
}

/* Uploaded Images Grid */
.uploaded-images {
    margin-top: var(--spacing-xl);
}

.uploaded-images__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.uploaded-images__header h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

.uploaded-images__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.uploaded-image {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background-color: var(--color-surface-light);
}

.uploaded-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.uploaded-image__remove {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    width: 24px;
    height: 24px;
    background-color: var(--alpha-black-70);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.uploaded-image:hover .uploaded-image__remove {
    opacity: 1;
}

.uploaded-image__remove:hover {
    background-color: var(--color-error);
}

/* ==========================================================================
   Step 4: Review Images
   ========================================================================== */

.review-summary {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--color-surface-light);
    border-radius: var(--radius-lg);
}

.review-summary__item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.review-summary__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.review-summary__value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

.review-images {
    margin-bottom: 0;
}

.review-images__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin: 0 0 var(--spacing-xs) 0;
}

.review-images__hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin: 0 0 var(--spacing-md) 0;
}

.review-images__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.review-images__grid .uploaded-image {
    min-height: 100px;
}

.review-requirement {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-warning-subtle);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-warning);
}

.review-requirement.satisfied {
    background-color: var(--color-success-subtle);
    color: var(--color-success);
}

/* ==========================================================================
   Step 5: Review & Train
   ========================================================================== */

.train-summary {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.summary-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-surface-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.summary-card--highlight {
    background: var(--color-primary-subtle);
    border-color: var(--color-primary);
}

.summary-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.summary-card--highlight .summary-card__icon {
    background: var(--color-primary-gradient);
    color: white;
}

.summary-card__content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.summary-card__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.summary-card__value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

.summary-card__value--large {
    font-size: var(--font-size-2xl);
    background: var(--color-primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.summary-card__edit {
    width: 36px;
    height: 36px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.summary-card__edit:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Training Info */
.training-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-surface-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.training-info__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.training-info__item svg {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.training-info__item strong {
    color: var(--color-text);
}

/* Training Terms */
.training-terms {
    padding: var(--spacing-lg);
    background-color: var(--color-surface-light);
    border-radius: var(--radius-lg);
}

.training-terms .form-checkbox span {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 640px) {
    .train-panel__header {
        flex-wrap: wrap;
    }

    .sample-dataset-link {
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-md);
    }

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

    .variety-grid,
    .pro-tips {
        grid-template-columns: 1fr;
    }

    .upload-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .upload-stat__divider {
        width: 60px;
        height: 1px;
    }
}