/* ============================================
   Watermark Image Maker - Modern Stylesheet
   Matching ConvertICO design system (GIF Loop Changer style)
   ============================================ */

/* CSS Variables */
:root {
    --primary: #0EA5E9;
    --primary-light: #BAE6FD;
    --primary-dark: #0284C7;
    --accent: #FF6B6B;
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --danger: #EF4444;
    --text-type: #3B82F6;
    --image-type: #8B5CF6;
    
    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* Base */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg) 0%, #f1f5f9 100%);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* Container */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-icon-inline {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.tool-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.tool-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Main Tool Area */
.tool-main {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border);
}

/* Upload Section */
.upload-section {
    padding: 3rem;
}

.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(2, 132, 199, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upload-area:hover,
.upload-area.dragover,
.upload-area.active {
    border-color: var(--primary);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.upload-content {
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--primary);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.upload-area:hover .upload-icon {
    transform: translateY(-5px);
}

.upload-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 0.5rem;
}

.upload-subtitle {
    color: var(--text-secondary);
    margin: 0 0 1rem;
    font-size: 1rem;
}

.upload-hint {
    display: inline-block;
    background: var(--bg);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

/* Editor Section */
.editor-section {
    padding: 0;
}

/* File Info Bar */
.file-info-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 1px solid var(--border);
}

.file-info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.file-info-item svg {
    color: var(--primary);
    flex-shrink: 0;
}

/* Editor Grid - Now Row Based */
.preview-row {
    padding: 2rem;
    background: #fafafa;
    border-bottom: 1px solid var(--border);
}

.preview-row .preview-panel {
    padding: 0;
    background: transparent;
    border-right: none;
}

.controls-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

/* Panels */
.preview-panel,
.controls-panel {
    padding: 2rem;
}

.controls-row .controls-panel {
    border-right: 1px solid var(--border);
}

.controls-row .controls-panel:last-child {
    border-right: none;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.panel-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.panel-header h3 svg {
    color: var(--primary);
}

.drag-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg);
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-full);
}

.drag-hint svg {
    color: var(--primary);
}

/* Preview Container */
.preview-container {
    position: relative;
}

.preview-wrapper {
    background: 
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    border-radius: var(--radius-lg);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.preview-wrapper canvas {
    max-width: 100%;
    max-height: 450px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    cursor: grab;
}

.preview-wrapper canvas:active {
    cursor: grabbing;
}

/* Watermark Type Cards */
.watermark-type-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.watermark-type-card {
    cursor: pointer;
}

.watermark-type-card input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.type-card-inner {
    padding: 1.25rem 1rem;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all 0.3s ease;
}

.watermark-type-card:hover .type-card-inner {
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.watermark-type-card input:checked + .type-card-inner {
    border-color: var(--primary);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1), var(--shadow-md);
}

.type-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 0.75rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.type-icon.text {
    background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
    color: var(--text-type);
}

.type-icon.image {
    background: linear-gradient(135deg, #F5F3FF, #EDE9FE);
    color: var(--image-type);
}

.watermark-type-card input:checked + .type-card-inner .type-icon {
    transform: scale(1.1);
}

.watermark-type-card input:checked + .type-card-inner .type-icon.text {
    background: linear-gradient(135deg, var(--text-type), #2563EB);
    color: white;
}

.watermark-type-card input:checked + .type-card-inner .type-icon.image {
    background: linear-gradient(135deg, var(--image-type), #7C3AED);
    color: white;
}

.type-title {
    display: block;
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
}

/* Settings Groups */
.settings-group {
    background: var(--bg);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
}

.settings-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 1rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.settings-title svg {
    color: var(--primary);
}

.output-settings {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-color: #86efac;
}

/* Control Groups */
.control-group {
    margin-bottom: 1rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.control-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.control-value {
    font-weight: 600;
    color: var(--primary);
    font-size: 0.85rem;
}

/* Text Input */
.text-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text);
    background: var(--bg-elevated);
    transition: all 0.2s ease;
}

.text-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

/* Select Input */
.select-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    color: var(--text);
    background: var(--bg-elevated);
    cursor: pointer;
    transition: all 0.2s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

.select-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

/* Range Input */
.range-input {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease;
}

.range-input::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.range-short {
    max-width: 140px;
}

/* Color Picker */
.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.color-input {
    width: 48px;
    height: 40px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 2px;
    background: var(--bg-elevated);
}

.color-input::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-input::-webkit-color-swatch {
    border: none;
    border-radius: 6px;
}

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

/* Checkbox */
.checkbox-group {
    padding-top: 0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text);
}

.checkbox-label input {
    display: none;
}

.checkbox-custom {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    background: var(--bg-elevated);
}

.checkbox-label input:checked + .checkbox-custom {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-color: var(--primary);
}

.checkbox-label input:checked + .checkbox-custom::after {
    content: '';
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

/* File Upload Button */
.file-upload-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.file-name {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Action Bar */
.action-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg);
    color: var(--text);
    border-color: var(--text-muted);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Progress Section */
.progress-section {
    padding: 2rem;
    text-align: center;
    background: var(--bg);
}

.progress-track {
    height: 8px;
    background: var(--border);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.3s ease;
}

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

/* Resize Settings */
.resize-settings {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-color: #fbbf24;
}

.resize-presets {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.resize-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.resize-btn:hover {
    border-color: var(--warning);
    color: var(--warning);
}

.resize-btn.active {
    background: linear-gradient(135deg, var(--warning), #D97706);
    color: white;
    border-color: var(--warning);
}

.resize-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.resize-label {
    color: var(--text-muted);
}

.resize-dimensions {
    font-weight: 600;
    color: var(--text);
}

/* Related Tools */
.related-tools {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
    padding: 1.25rem 1.5rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
}

.related-label {
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
}

.related-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: var(--bg);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
}

.related-link:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.related-link svg {
    flex-shrink: 0;
}

/* Info Sections */
.info-sections {
    display: grid;
    gap: 2rem;
    margin-top: 3rem;
}

.info-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.35rem;
    color: var(--text);
    margin: 0 0 1.5rem;
}

.info-card h2 svg {
    color: var(--primary);
}

/* Steps List */
.steps-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: step;
}

.steps-list li {
    position: relative;
    padding-left: 3.5rem;
    padding-bottom: 1.25rem;
    margin-left: 1rem;
    counter-increment: step;
}

.steps-list li:not(:last-child) {
    border-left: 2px solid var(--primary-light);
}

.steps-list li:last-child {
    padding-bottom: 0;
}

.steps-list li::before {
    content: counter(step);
    position: absolute;
    left: -1rem;
    top: 0;
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

/* Mode Explanations */
.mode-explanations {
    display: grid;
    gap: 1rem;
}

.mode-explain {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.mode-tag {
    flex-shrink: 0;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.mode-tag.text {
    background: linear-gradient(135deg, var(--text-type), #2563EB);
}

.mode-tag.image {
    background: linear-gradient(135deg, var(--image-type), #7C3AED);
}

.mode-explain p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: 0.75rem;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg);
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.faq-question:hover {
    background: var(--bg-elevated);
}

.faq-question svg {
    color: var(--primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 1.25rem 1rem;
    background: var(--bg-elevated);
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-answer p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Responsive */
@media (max-width: 900px) {
    .controls-row {
        grid-template-columns: 1fr;
    }
    
    .controls-row .controls-panel {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    
    .controls-row .controls-panel:last-child {
        border-bottom: none;
    }
    
    .file-info-bar {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .tool-container {
        padding: 1rem;
    }
    
    .upload-section {
        padding: 2rem 1.5rem;
    }
    
    .preview-row {
        padding: 1.5rem;
    }
    
    .preview-panel,
    .controls-panel {
        padding: 1.5rem;
    }
    
    .watermark-type-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .control-row {
        grid-template-columns: 1fr;
    }
    
    .action-bar {
        flex-direction: column;
        padding: 1.5rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .related-tools {
        flex-direction: column;
        text-align: center;
    }
    
    .related-links {
        justify-content: center;
    }
    
    .mode-explain {
        flex-direction: column;
    }
    
    .panel-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }
    
    .resize-presets {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .tool-title {
        font-size: 1.75rem;
    }
    
    .file-info-bar {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }
    
    .color-picker-wrapper {
        flex-wrap: wrap;
    }
    
    .file-upload-btn {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.editor-section {
    animation: fadeIn 0.4s ease;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}