/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #141414;
    --bg-hover: #222222;

    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;

    --accent-primary: #ffffff;
    --accent-secondary: #cccccc;
    --accent-glow: rgba(255, 255, 255, 0.15);

    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    --border-color: rgba(255, 255, 255, 0.1);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.7);

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    --sidebar-width: 320px;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== App Container ===== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    overflow-y: auto;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
}

.sidebar-header {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
}

.logo-subtitle {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 4px;
}

/* ===== Reference Section ===== */
.reference-section h3,
.config-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.reference-slots {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
    min-height: 70px;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    border: 2px dashed transparent;
    transition: all var(--transition-fast);
}

.reference-slots.drag-over {
    background: var(--accent-glow);
    border-color: var(--accent-primary);
}

.reference-count {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: block;
}

.reference-slot {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-sm);
    border: 2px dashed var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-fast);
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.reference-slot.add-new {
    border-style: dashed;
}

.reference-slot:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
}

.reference-slot.empty .slot-label {
    font-size: 0.6rem;
    color: var(--text-muted);
    text-align: center;
    padding: 2px;
}

.reference-slot.filled {
    border-style: solid;
    border-color: var(--accent-primary);
}

.reference-slot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.reference-slot .remove-ref {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--error);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 10;
}

.reference-slot .remove-ref svg {
    width: 10px;
    height: 10px;
}

.reference-slot.filled:hover .remove-ref {
    opacity: 1;
}

.reference-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

/* ===== Config Sections ===== */
.config-section {
    display: flex;
    flex-direction: column;
}

/* ===== Custom Select Dropdown ===== */
.custom-select {
    position: relative;
    width: 100%;
}

.custom-select-trigger {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.custom-select-trigger:hover {
    border-color: var(--accent-primary);
    background-color: var(--bg-hover);
}

.custom-select.open .custom-select-trigger {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.custom-select-arrow {
    color: var(--accent-primary);
    font-size: 0.8rem;
    transition: transform var(--transition-fast);
}

.custom-select.open .custom-select-arrow {
    transform: rotate(180deg);
}

.custom-select-options {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all var(--transition-fast);
}

.custom-select.open .custom-select-options {
    max-height: 300px;
    opacity: 1;
    overflow-y: auto;
}

.custom-select-option {
    padding: 12px 16px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.custom-select-option:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.custom-select-option.selected {
    background: var(--accent-primary);
    color: #000000;
}

/* ===== Button Toggle Group ===== */
.button-group {
    display: flex;
    gap: 8px;
}

.btn-toggle {
    flex: 1;
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-toggle.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #000000;
}

/* ===== Aspect Ratio Grid ===== */
.aspect-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.btn-aspect {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-aspect:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-aspect.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #000000;
}

/* ===== Number Input ===== */
.number-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-number {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-number:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.number-input {
    flex: 1;
    text-align: center;
    padding: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    -moz-appearance: textfield;
    appearance: textfield;
}

/* Hide number input spinners */
.number-input::-webkit-outer-spin-button,
.number-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.number-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* ===== Text Input ===== */
.text-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    margin-bottom: 8px;
}

.text-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.text-input::placeholder {
    color: var(--text-muted);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: var(--accent-primary);
    color: #000000;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
    background: var(--accent-secondary);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: 0.8rem;
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* ===== Prompt Area ===== */
.prompt-area {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--bg-primary);
    padding-bottom: 16px;
}

.prompt-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 16px;
    box-shadow: var(--shadow-md);
}

.prompt-container textarea {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    min-height: 80px;
}

.prompt-container textarea:focus {
    outline: none;
}

.prompt-container textarea::placeholder {
    color: var(--text-muted);
}

.prompt-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.char-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.btn-icon {
    font-size: 1rem;
}

/* ===== Loading ===== */
.loading-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-top: 16px;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Loading Placeholder Cards ===== */
.loading-placeholder {
    min-height: 300px;
    background: var(--bg-card);
    border: 2px dashed var(--accent-primary);
    display: flex;
    flex-direction: column;
    position: relative;
    animation: pulse-border 2s ease-in-out infinite;
}

@keyframes pulse-border {
    0%, 100% {
        border-color: var(--accent-primary);
        opacity: 1;
    }
    50% {
        border-color: var(--accent-secondary);
        opacity: 0.7;
    }
}

.loading-placeholder-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px;
}

.loading-placeholder .loading-spinner {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

.loading-placeholder-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.loading-placeholder .image-card-overlay {
    position: relative;
    inset: auto;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, transparent 100%);
    padding: 16px;
}

.loading-tag {
    background: var(--accent-primary) !important;
    color: var(--bg-primary) !important;
    display: flex;
    align-items: center;
    gap: 4px;
}

.loading-tag .spin-icon {
    width: 12px;
    height: 12px;
    animation: spin 1s linear infinite;
}

/* ===== Gallery ===== */
.gallery-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.gallery-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 20px;
    flex: 1;
    align-items: start;
}

.gallery-empty {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 2px dashed var(--border-color);
}

.empty-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    opacity: 0.3;
    color: var(--text-secondary);
}

.gallery-empty p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.gallery-empty .empty-hint {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

/* ===== Image Card ===== */
.image-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
}

.image-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.image-card img {
    width: 100%;
    height: auto;
    display: block;
}

.image-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 16px;
}

.image-card:hover .image-card-overlay {
    opacity: 1;
}

.image-card-actions {
    position: absolute;
    display: flex;
    gap: 8px;
    z-index: 10;
}

.image-card-actions-top {
    top: 10px;
    right: 10px;
}

.image-card-actions-bottom {
    bottom: 10px;
    right: 10px;
}

.image-card-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-fast);
}

.image-card-btn svg {
    width: 16px;
    height: 16px;
}

.image-card:hover .image-card-btn {
    opacity: 1;
}

.image-card-download:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: scale(1.1);
}

.image-card-delete:hover {
    background: var(--error);
    border-color: var(--error);
    transform: scale(1.1);
}

.image-card-reference:hover {
    background: var(--success);
    border-color: var(--success);
    transform: scale(1.1);
}

.image-card-recreate:hover {
    background: #6366f1;
    border-color: #6366f1;
    transform: scale(1.1);
}

.image-card-prompt {
    font-size: 0.8rem;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 8px;
}

.image-card-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.meta-tag {
    font-size: 0.7rem;
    padding: 4px 8px;
    background: rgba(0, 0, 0, 0.8);
    border-radius: 4px;
    color: #fff;
    backdrop-filter: blur(4px);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close svg {
    width: 18px;
    height: 18px;
}

.modal-close:hover {
    background: var(--error);
}

#modalImage {
    max-width: 100%;
    max-height: 60vh;
    object-fit: contain;
    border-radius: var(--border-radius);
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.modal-actions .btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.modal-actions .btn {
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-metadata {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    padding: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.modal-metadata p {
    margin-bottom: 8px;
}

.modal-metadata p:last-child {
    margin-bottom: 0;
}

.modal-metadata strong {
    color: var(--text-primary);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #444;
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .sidebar {
        width: 280px;
    }

    .main-content {
        margin-left: 280px;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        position: relative;
        width: 100%;
        height: auto;
        padding: 16px;
    }

    .main-content {
        margin-left: 0;
    }

    .reference-slots {
        grid-template-columns: repeat(3, 1fr);
    }

    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}