/* ===== CSS Variables & Design Tokens ===== */
:root {
    /* Color Palette - Tema Oscuro Navy */
    --color-primary: #8b5cf6;
    --color-primary-dark: #7c3aed;
    --color-primary-light: #a78bfa;
    --color-secondary: #10b981;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    /* Backgrounds - Tema Oscuro Navy */
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d2e;
    --bg-tertiary: #252836;
    --bg-elevated: #2d3142;

    /* Text Colors - Tema Oscuro */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;

    /* Borders */
    --border-color: #2d3142;
    --border-color-light: #383d52;

    /* Shadows - Oscuras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ===== App Container ===== */
.app-container {
    max-width: 1920px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ===== Header ===== */
.app-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.header-content {
    animation: fadeInDown 0.6s ease-out;
}

.app-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.title-icon {
    width: 2.5rem;
    height: 2.5rem;
    stroke: var(--color-primary);
    filter: drop-shadow(0 0 10px rgba(138, 80, 255, 0.5));
}

.app-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* ===== Upload Section ===== */
.upload-section {
    animation: fadeIn 0.8s ease-out;
}

.upload-area {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(16, 185, 129, 0.05));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.upload-area:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-area:hover::before {
    opacity: 1;
}

.upload-area.drag-over {
    border-color: var(--color-primary);
    background: var(--bg-elevated);
    transform: scale(1.02);
}

.upload-icon {
    width: 4rem;
    height: 4rem;
    stroke: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
}

.upload-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.upload-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ===== Editor Section ===== */
.editor-section {
    animation: fadeIn 0.6s ease-out;
}

.editor-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

/* ===== Controls Panel ===== */
.controls-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: var(--spacing-lg);
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
}

.controls-panel::-webkit-scrollbar {
    width: 8px;
}

.controls-panel::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.controls-panel::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-sm);
}

.control-group {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.control-group:last-of-type {
    border-bottom: none;
}

.control-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
}

.control-icon {
    width: 1.25rem;
    height: 1.25rem;
    stroke: var(--color-primary);
}

/* ===== Form Elements ===== */
.input-field {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.input-field:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(138, 80, 255, 0.1);
}

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

/* Format Options */
.format-options {
    display: flex;
    gap: var(--spacing-sm);
}

.radio-option {
    flex: 1;
    cursor: pointer;
}

.radio-option input[type="radio"] {
    display: none;
}

.radio-label {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.radio-option input[type="radio"]:checked+.radio-label {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: 0 0 12px rgba(138, 80, 255, 0.4);
}

.radio-label:hover {
    border-color: var(--color-primary-light);
}

/* Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(138, 80, 255, 0.4);
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 16px rgba(138, 80, 255, 0.6);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(138, 80, 255, 0.4);
}

.slider-value {
    min-width: 3rem;
    text-align: right;
    font-weight: 600;
    color: var(--color-primary);
}

/* Dimension Inputs */
.dimension-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

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

.input-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Checkbox */
.checkbox-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-option input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    cursor: pointer;
    accent-color: var(--color-primary);
}

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

.help-text {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
    font-style: italic;
}

/* File Size Estimate */
.file-size-estimate {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.estimate-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.estimate-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-success);
}


/* ===== Buttons ===== */
.btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-family: inherit;
}

.btn svg {
    width: 1.2rem;
    height: 1.2rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

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

.btn-secondary:hover {
    border-color: var(--color-primary);
    background: var(--bg-elevated);
    transform: translateY(-2px);
}

.btn-success {
    background: var(--color-success);
    color: white;
}

.btn-success:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    flex: 1;
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.85rem;
}

/* Crop Size Inputs */
.crop-size-inputs {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.crop-size-inputs .input-label:first-child {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

/* Focus Point Selector */
.focus-point-selector {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.focus-point-selector .input-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xs);
}

.focus-btn {
    aspect-ratio: 1;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.focus-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: scale(1.05);
}

.focus-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: 0 0 12px rgba(138, 80, 255, 0.5);
}



/* Action Buttons */
.action-buttons {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.batch-actions-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
}

.batch-actions-row {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
}

.batch-actions-row .btn {
    flex: 1;
}

.btn-full-width {
    width: 100%;
    justify-content: center;
}

/* ===== Preview Panel ===== */
.preview-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.preview-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.image-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.preview-container {
    position: relative;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    /* Allow scrolling for large batch canvas */
}

#canvas {
    max-width: 100%;
    max-height: 50vh;
    display: block;
    border-radius: var(--radius-sm);
}

/* ===== Crop Overlay ===== */
.crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    cursor: crosshair;
}

.crop-box {
    position: absolute;
    border: 2px solid var(--color-primary);
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
    cursor: move;
}

.crop-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

.crop-handle.nw {
    top: -6px;
    left: -6px;
    cursor: nw-resize;
}

.crop-handle.ne {
    top: -6px;
    right: -6px;
    cursor: ne-resize;
}

.crop-handle.sw {
    bottom: -6px;
    left: -6px;
    cursor: sw-resize;
}

.crop-handle.se {
    bottom: -6px;
    right: -6px;
    cursor: se-resize;
}

.crop-dimensions {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(138, 80, 255, 0.95);
    color: white;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}



/* ===== Batch Queue Section ===== */
.batch-queue-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.batch-queue {
    max-height: 400px;
    overflow-y: auto;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.batch-queue::-webkit-scrollbar {
    width: 6px;
}

.batch-queue::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.batch-queue::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-sm);
}

.batch-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.batch-item:hover {
    background: var(--bg-elevated);
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(138, 80, 255, 0.2);
}

.batch-item.processed {
    opacity: 0.6;
    border-left: 3px solid var(--color-success);
}

.batch-item-thumbnail {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
}

.batch-item-info {
    flex: 1;
    min-width: 0;
}

.batch-item-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.batch-item-size {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.batch-item-remove {
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    color: var(--color-danger);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.batch-item-remove:hover {
    background: var(--color-danger);
    color: white;
}

/* ===== Batch Progress ===== */
.batch-progress {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-sm);
    transition: width var(--transition-base);
    width: 0%;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

/* ===== Utility Classes ===== */
.hidden {
    display: none !important;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .editor-layout {
        grid-template-columns: 1fr;
    }

    .controls-panel {
        position: static;
        max-height: none;
    }
}

@media (max-width: 640px) {
    .app-title {
        font-size: 1.75rem;
    }

    .format-options {
        flex-direction: column;
    }

    .dimension-inputs {
        grid-template-columns: 1fr;
    }
}