/* ==========================================
   PALETTE FROM IMAGE
   Clean Upload & Visualization Design
   ========================================== */

:root {
    --primary: #ec4899;
    --primary-light: #fce7f3;
    --primary-dark: #db2777;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.pfi-container {
    max-width: 1200px;
    margin: 0 auto;
    font-family: 'Inter', -apple-system, sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
}

/* Header */
.pfi-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 24px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.pfi-header-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image: radial-gradient(circle at 2px 2px, white 1px, transparent 0);
    background-size: 24px 24px;
}

.pfi-header-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.pfi-badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
}

.pfi-title {
    font-size: 48px;
    font-weight: 800;
    margin: 0 0 16px;
}

.pfi-subtitle {
    font-size: 18px;
    opacity: 0.9;
    line-height: 1.7;
}

/* Tool Section */
.pfi-tool {
    max-width: 1000px;
    margin: -40px auto 0;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

/* Upload Zone */
.pfi-upload-zone {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 60px;
    text-align: center;
    border: 3px dashed var(--gray-300);
    transition: all 0.3s;
    cursor: pointer;
}

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

.pfi-upload-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.pfi-upload-content h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.pfi-upload-content p {
    color: var(--gray-500);
    margin-bottom: 24px;
}

/* Buttons */
.pfi-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

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

.pfi-btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.pfi-btn-small {
    padding: 8px 16px;
    font-size: 13px;
}

/* Processing */
.pfi-processing {
    background: white;
    border-radius: var(--radius-xl);
    padding: 80px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.pfi-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 24px;
}

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

/* Results */
.pfi-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.pfi-image-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.pfi-image-container {
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 20px;
    background: var(--gray-100);
}

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

.pfi-palette-section {
    background: white;
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-lg);
}

.pfi-palette-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.pfi-palette-header h3 {
    font-size: 20px;
    font-weight: 700;
}

.pfi-palette-actions {
    display: flex;
    gap: 8px;
}

.pfi-color-count {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--gray-200);
}

.pfi-count-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 2px solid var(--gray-200);
    background: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.pfi-count-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pfi-palette-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.pfi-color-card {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.2s;
}

.pfi-color-card:hover {
    transform: scale(1.02);
}

.pfi-color-swatch {
    height: 100px;
    position: relative;
}

.pfi-color-hex {
    position: absolute;
    bottom: 8px;
    left: 8px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 12px;
}

.pfi-color-info {
    padding: 12px;
    background: white;
}

.pfi-color-rgb {
    font-size: 12px;
    color: var(--gray-500);
    font-family: monospace;
}

/* Exports */
.pfi-exports {
    border-top: 1px solid var(--gray-200);
    padding-top: 20px;
}

.pfi-exports h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    color: var(--gray-500);
}

.pfi-export-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.pfi-export-tab {
    padding: 8px 16px;
    border: none;
    background: var(--gray-100);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
    cursor: pointer;
}

.pfi-export-tab.active {
    background: var(--primary);
    color: white;
}

.pfi-export-code {
    background: #1f2937;
    color: #e5e7eb;
    padding: 16px;
    border-radius: var(--radius);
    font-family: 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.6;
    overflow-x: auto;
    max-height: 200px;
    margin-bottom: 12px;
}

/* Features */
.pfi-features {
    padding: 80px 24px;
    background: var(--gray-50);
}

.pfi-section-title {
    text-align: center;
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 48px;
}

.pfi-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.pfi-feature {
    text-align: center;
}

.pfi-feature-num {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    margin: 0 auto 16px;
}

.pfi-feature h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.pfi-feature p {
    color: var(--gray-600);
}

/* Use Cases */
.pfi-usecases {
    padding: 80px 24px;
}

.pfi-usecase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pfi-usecase {
    text-align: center;
    padding: 32px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.pfi-usecase-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.pfi-usecase h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.pfi-usecase p {
    color: var(--gray-600);
}

/* Content */
.pfi-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 64px 24px;
}

.pfi-content h2 {
    font-size: 28px;
    font-weight: 800;
    margin: 48px 0 24px;
    color: var(--gray-900);
}

.pfi-content ol, .pfi-content ul {
    padding-left: 24px;
    margin: 20px 0;
}

.pfi-content li {
    margin-bottom: 12px;
    color: var(--gray-600);
}

.pfi-why-grid {
    display: grid;
    gap: 20px;
    margin: 32px 0;
}

.pfi-why-item {
    padding: 24px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}

.pfi-why-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.pfi-why-item p {
    margin: 0;
    color: var(--gray-600);
}

.pfi-faq {
    margin: 32px 0;
}

.pfi-faq-item {
    border-bottom: 1px solid var(--gray-200);
    padding: 24px 0;
}

.pfi-faq-item h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 12px;
}

.pfi-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 48px;
    border-radius: var(--radius-xl);
    text-align: center;
    margin-top: 48px;
}

.pfi-cta h3 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .pfi-results {
        grid-template-columns: 1fr;
    }
    
    .pfi-palette-grid {
        grid-template-columns: 1fr;
    }
}