/* ===== AI Skin Disease Detection System - Styles ===== */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #1c2128;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #58a6ff;
    --accent-dim: #388bfd;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --info: #79c0ff;
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    --transition: 0.2s ease;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.app-wrap {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ----- Header ----- */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition);
}
.back-link:hover {
    color: var(--accent);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.logo i {
    font-size: 2rem;
    color: var(--accent);
}
.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.logo p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

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

.icon-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
}
.icon-btn:hover {
    background: var(--border);
    border-color: var(--text-muted);
}

/* ----- Model status ----- */
.model-status {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.5rem 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.model-status.ready {
    color: var(--success);
}
.model-status.ready .fa-spin {
    animation: none;
}
.model-status .fa-circle-notch {
    color: var(--accent);
}

/* ----- Main content ----- */
.main {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    width: 100%;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}
@media (max-width: 900px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* ----- Panels ----- */
.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.panel h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}
.panel h2 i {
    color: var(--accent);
}

/* ----- Input panel ----- */
.input-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.tab {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition);
}
.tab:hover {
    color: var(--text-primary);
}
.tab.active {
    background: var(--bg-tertiary);
    color: var(--accent);
    border-color: var(--border);
}

[data-tab-content] {
    display: none;
}
[data-tab-content].active {
    display: block;
}

.upload-area .drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
}
.upload-area .drop-zone:hover,
.upload-area .drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(56, 139, 253, 0.06);
}
.upload-area .drop-zone i {
    font-size: 2.5rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    display: block;
}
.upload-area .drop-zone p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.upload-area .drop-zone .sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}
.upload-area .drop-zone .btn {
    margin-top: 1rem;
}

.camera-placeholder,
.camera-live {
    text-align: center;
    padding: 1.5rem;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    background: var(--bg-primary);
}
.camera-placeholder i {
    font-size: 2rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    display: block;
}
.camera-placeholder p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}
.camera-live video {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius-sm);
    background: #000;
    display: block;
    margin: 0 auto 1rem;
}
.camera-controls {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hidden {
    display: none !important;
}

.preview-wrap {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}
.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.35rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}
.btn-icon:hover {
    color: var(--danger);
    background: rgba(248, 81, 73, 0.15);
}
.preview-container {
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-primary);
    margin-bottom: 1rem;
    max-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.preview-container img {
    max-width: 100%;
    max-height: 280px;
    object-fit: contain;
    display: block;
}
.btn-analyze {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
}
.btn-analyze i {
    margin-right: 0.5rem;
}

/* ----- Buttons ----- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: filter var(--transition), background var(--transition);
}
.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover:not(:disabled) {
    filter: brightness(1.1);
}
.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
    background: var(--border);
}
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ----- Results panel ----- */
.results-empty {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--text-muted);
}
.results-empty i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}
.results-empty p {
    font-size: 0.95rem;
}
.results-empty .sub {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.results-loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}
.results-loading i {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
    display: block;
}

.results-content .result-primary {
    margin-bottom: 1.25rem;
}
.results-content .label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}
.condition-card.primary {
    background: linear-gradient(135deg, rgba(56, 139, 253, 0.15), rgba(56, 139, 253, 0.05));
    border: 1px solid rgba(56, 139, 253, 0.4);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.condition-card .name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}
.condition-card .confidence {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--success);
}

.result-foods,
.result-remedies {
    margin-bottom: 1.25rem;
}
.result-foods .label,
.result-remedies .label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.result-foods .label i {
    color: var(--success);
}
.result-remedies .label i {
    color: var(--info);
}
.solution-list {
    list-style: none;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.solution-list li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
}
.solution-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}
.result-remedies .solution-list li::before {
    content: '✓';
    color: var(--success);
}

.result-details {
    margin-bottom: 1.25rem;
}
.confidence-bars {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.bar-row {
    display: grid;
    grid-template-columns: 1fr 60px;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
}
.bar-row .name {
    color: var(--text-secondary);
}
.bar-row .pct {
    font-family: var(--font-mono);
    color: var(--text-muted);
    text-align: right;
}
.bar-track {
    grid-column: 1 / -1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}
.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-dim));
    border-radius: 3px;
    transition: width 0.5s ease;
}

.result-meta .meta-list {
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.meta-list li {
    padding: 0.25rem 0;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}
.meta-list li span:first-child {
    color: var(--text-secondary);
}

.disclaimer {
    margin-top: 1.25rem;
    padding: 0.75rem 1rem;
    background: rgba(210, 153, 34, 0.1);
    border: 1px solid rgba(210, 153, 34, 0.3);
    border-radius: var(--radius-sm);
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}
.disclaimer i {
    color: var(--warning);
    margin-top: 0.15rem;
    flex-shrink: 0;
}
.disclaimer p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ----- Info panel (condition guide) ----- */
.info-panel {
    margin-bottom: 1rem;
}
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 0.75rem;
}
.info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--transition);
}
.info-card:hover {
    border-color: var(--text-muted);
}
.info-card-header {
    padding: 0.75rem 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
}
.info-card-header i {
    color: var(--text-muted);
    transition: transform var(--transition);
}
.info-card.open .info-card-header i {
    transform: rotate(180deg);
}
.info-card-body {
    padding: 0 1rem 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: none;
}
.info-card.open .info-card-body {
    display: block;
}

/* ----- History sidebar ----- */
.history-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 360px;
    max-width: 100%;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    z-index: 200;
    display: flex;
    flex-direction: column;
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.3);
    transition: transform 0.25s ease;
}
.history-sidebar.hidden {
    transform: translateX(100%);
}

.sidebar-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
}
.history-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: border-color var(--transition);
}
.history-item:hover {
    border-color: var(--accent);
}
.history-item .condition {
    font-weight: 500;
    color: var(--text-primary);
}
.history-item .date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}
.history-item .thumb {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
    margin-top: 0.5rem;
    background: var(--bg-tertiary);
}

.btn-clear-history {
    margin: 1rem;
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 199;
    transition: opacity 0.25s ease;
}
.sidebar-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

/* ----- About modal ----- */
.modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.6);
    transition: opacity 0.2s ease;
}
.modal.hidden {
    opacity: 0;
    pointer-events: none;
}
.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-width: 480px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}
.modal-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}
.modal-body {
    padding: 1.25rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.modal-body p {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}
.modal-body p:last-child {
    margin-bottom: 0;
}

/* ----- Footer ----- */
.footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}