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

:root {
    --primary-color: #E4405F;
    --secondary-color: #F56040;
    --accent-color: #FCAF45;
    --text-primary: #262626;
    --text-secondary: #8E8E8E;
    --background: #FAFAFA;
    --white: #FFFFFF;
    --border: #DBDBDB;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
    --gradient: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    --gradient-light: linear-gradient(45deg, #FF6B9D, #FF8E53);
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.header.scrolled {
    padding: 8px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    transition: all 0.3s ease;
}

.header.scrolled .logo {
    font-size: 1.5rem;
    margin-bottom: 2px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
    transition: all 0.3s ease;
}

.header.scrolled .tagline {
    font-size: 0.9rem;
}

/* Upload Section */
.upload-section {
    padding: 60px 0;
}

.upload-zone {
    position: relative;
    background: var(--white);
    border: 3px dashed var(--border);
    border-radius: var(--border-radius-lg);
    padding: 80px 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    max-width: 600px;
    margin: 0 auto;
}

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

.upload-zone.drag-over {
    border-color: var(--primary-color);
    background: rgba(228, 64, 95, 0.05);
    transform: scale(1.02);
}

.upload-content {
    position: relative;
    z-index: 2;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.8;
}

.upload-zone h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.upload-zone p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1rem;
}

.upload-btn {
    background: var(--gradient);
    color: var(--white);
    border: none;
    padding: 16px 32px;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

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

.upload-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 16px;
}

.upload-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(228, 64, 95, 0.1);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
}

.upload-zone.drag-over .upload-overlay {
    opacity: 1;
}

.upload-overlay-content {
    text-align: center;
}

.upload-overlay .upload-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.upload-overlay p {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Format Section */
.format-section {
    padding: 40px 0;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    margin: 40px 0;
    box-shadow: var(--shadow);
}

.format-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    padding: 0 20px;
}

.format-tab {
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    padding: 20px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.format-tab:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.format-tab.active {
    border-color: var(--primary-color);
    background: rgba(228, 64, 95, 0.05);
    box-shadow: var(--shadow);
}

.tab-icon {
    font-size: 1.5rem;
}

.tab-label {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.tab-ratio {
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--background);
    padding: 4px 8px;
    border-radius: 6px;
}

/* Preview Section */
.preview-section {
    padding: 40px 0;
}

.preview-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* All Previews Section */
.all-previews {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
    border: 2px solid var(--primary-color);
}

.preview-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.format-preview {
    background: var(--background);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.format-preview:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.format-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.format-icon {
    font-size: 1.2rem;
}

.format-name {
    font-size: 1rem;
}

.format-ratio {
    background: var(--primary-color);
    color: var(--white);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Small Phone Mockups */
.phone-mockup-small {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 15px 0;
}

.phone-frame-small {
    width: 140px;
    height: 280px;
    background: #1a1a1a;
    border-radius: 15px;
    padding: 10px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    position: relative;
}

/* Mobile-specific phone mockup sizing */
@media (max-width: 768px) {
    .phone-frame-small {
        width: 180px;
        height: 360px;
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .phone-frame-small {
        width: 200px;
        height: 400px;
        padding: 15px;
    }
}

.phone-frame-small::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background: #333;
    border-radius: 1px;
}

.phone-screen-small {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.instagram-header-small {
    background: var(--white);
    padding: 4px 8px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 4px;
}

.instagram-logo-small {
    font-size: 0.8rem;
}

.instagram-title-small {
    font-weight: 600;
    font-size: 0.7rem;
    color: var(--text-primary);
}

.instagram-content-small {
    height: calc(100% - 24px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 2px 8px 8px 8px;
    background: var(--background);
    position: relative;
}

.preview-canvas {
    max-width: 100%;
    max-height: 100%;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    object-fit: contain;
    display: block;
    margin: auto;
}

/* Small Download Buttons */
.download-btn-small {
    background: var(--gradient);
    color: var(--white);
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 10px;
}

.download-btn-small:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.download-icon {
    font-size: 0.9rem;
}

/* Individual Format Controls */
.format-controls {
    display: flex;
    gap: 8px;
    margin: 15px 0;
    padding: 12px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.format-controls:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.control-group-small {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.control-group-small label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

.control-group-small input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.control-group-small input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--gradient);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.control-group-small input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.control-group-small input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--gradient);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.control-group-small input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* Phone Mockup */
.phone-mockup {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 500px;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: #1a1a1a;
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: #333;
    border-radius: 2px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.instagram-header {
    background: var(--white);
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.instagram-logo {
    font-size: 1.5rem;
}

.instagram-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.instagram-content {
    height: calc(100% - 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.post-preview {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background);
    border-radius: var(--border-radius);
    overflow: hidden;
}

#previewCanvas {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

/* Controls */
.controls {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
}

.controls-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    text-align: center;
}

.control-group {
    margin-bottom: 24px;
}

.control-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.control-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient);
    cursor: pointer;
    box-shadow: var(--shadow);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow);
}

/* Download Section */
.download-section {
    margin-top: 30px;
    text-align: center;
}

.download-btn {
    background: var(--gradient);
    color: var(--white);
    border: none;
    padding: 16px 32px;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.download-icon {
    font-size: 1.2rem;
}

.download-info {
    margin-top: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Ad Section */
.ad-section {
    padding: 40px 0;
    text-align: center;
}

.ad-unit {
    max-width: 728px;
    margin: 0 auto;
}

.ad-placeholder {
    background: var(--white);
    border: 2px dashed var(--border);
    border-radius: var(--border-radius);
    padding: 40px;
    color: var(--text-secondary);
}

.ad-placeholder p {
    margin-bottom: 16px;
    font-weight: 600;
}

.ad-content {
    height: 90px;
    background: var(--background);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-banner {
    width: 100%;
    height: 60px;
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
    border-radius: 6px;
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background: var(--white);
    margin: 60px 0;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: var(--white);
    padding: 40px 0;
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-link {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-link:hover {
    opacity: 1;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-content {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-hover);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-content p {
    font-weight: 600;
    color: var(--text-primary);
}

/* Error Modal */
.error-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.error-content {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-hover);
    max-width: 400px;
    margin: 20px;
}

.error-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.error-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.error-btn {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.error-btn:hover {
    background: #d6335a;
    transform: translateY(-1px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .upload-zone {
        padding: 60px 20px;
    }
    
    .upload-icon {
        font-size: 3rem;
    }
    
    .upload-zone h2 {
        font-size: 1.5rem;
    }
    
    .format-tabs {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        padding: 0 16px;
    }
    
    .format-tab {
        padding: 16px;
    }
    
    .preview-container {
        flex-direction: column;
        gap: 30px;
    }
    
    .preview-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .format-preview {
        padding: 15px;
    }
    
    .phone-frame-small {
        width: 120px;
        height: 240px;
    }
    
    .phone-frame {
        width: 240px;
        height: 480px;
    }
    
    .controls {
        padding: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .upload-zone {
        padding: 40px 16px;
    }
    
    .format-tabs {
        grid-template-columns: 1fr;
    }
    
    .preview-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .phone-frame-small {
        width: 200px;
        height: 400px;
    }
    
    .format-preview {
        padding: 20px;
    }
    
    .format-controls {
        flex-direction: column;
        gap: 6px;
        padding: 10px;
    }
    
    .control-group-small {
        flex-direction: row;
        align-items: center;
        gap: 8px;
    }
    
    .control-group-small label {
        font-size: 0.7rem;
        min-width: 20px;
    }
    
    .control-group-small input[type="range"] {
        flex: 1;
    }
    
    .phone-frame {
        width: 200px;
        height: 400px;
    }
    
    .phone-frame {
        padding: 15px;
    }
    
    .instagram-header {
        padding: 12px 16px;
    }
    
    .instagram-content {
        padding: 16px;
    }
}

/* Touch Support */
@media (hover: none) and (pointer: coarse) {
    .upload-zone:hover {
        transform: none;
    }
    
    .format-tab:hover {
        transform: none;
    }
    
    .download-btn:hover {
        transform: none;
    }
    
    .feature-card:hover {
        transform: none;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .phone-frame {
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus States */
button:focus,
input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .ad-section,
    .features-section {
        display: none;
    }
    
    .preview-section {
        page-break-inside: avoid;
    }
}