/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Modern Color Palette */
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --primary-light: #4895ef;
    --secondary: #7209b7;
    --accent: #f72585;
    --success: #4cc9f0;
    --warning: #f8961e;
    --danger: #f94144;
    --info: #4cc9f0;
    
    /* Background Colors */
    --bg-primary: #0a0e17;
    --bg-secondary: #121828;
    --bg-card: #1a1f35;
    --bg-input: #2d3748;
    --bg-hover: #2a2f45;
    
    /* Text Colors */
    --text-primary: #f7fafc;
    --text-secondary: #cbd5e0;
    --text-muted: #a0aec0;
    --text-light: #ffffff;
    
    /* Border & Shadows */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-radius: 16px;
    --border-radius-sm: 10px;
    --border-radius-lg: 24px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-primary: 0 8px 32px rgba(67, 97, 238, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index layers */
    --z-background: -1;
    --z-base: 1;
    --z-dropdown: 10;
    --z-sticky: 100;
    --z-modal: 1000;
    --z-toast: 2000;
}

/* Base Styles */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Selection Color */
::selection {
    background-color: var(--primary);
    color: white;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-background);
    overflow: hidden;
}

.gradient-circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
}

.circle-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    top: -200px;
    left: -200px;
    animation: float 25s infinite ease-in-out;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    bottom: -150px;
    right: -150px;
    animation: float 30s infinite ease-in-out reverse;
}

.circle-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--success), var(--primary));
    top: 50%;
    left: 80%;
    animation: float 20s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.05);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

/* ============================================
   LAYOUT & CONTAINER
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    position: relative;
    z-index: var(--z-base);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.logo-icon {
    position: relative;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-primary);
}

.logo-icon i {
    font-size: 1.8rem;
    color: white;
    position: absolute;
}

.logo-icon i:first-child {
    transform: translate(-5px, -5px);
}

.logo-icon i:last-child {
    transform: translate(5px, 5px);
}

.logo-text h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.logo-highlight {
    color: var(--accent);
    -webkit-text-fill-color: var(--accent);
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.header-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.stat-item i {
    color: var(--primary);
    font-size: 1.1rem;
}

/* ============================================
   MAIN CARD
   ============================================ */
.main-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    margin-bottom: var(--spacing-2xl);
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   SECTIONS
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.step-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.step-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.step-number.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-primary);
}

.step-number.completed {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.step-line {
    width: 80px;
    height: 2px;
    background: var(--border-color);
    transition: all var(--transition-normal);
}

.step-line.completed {
    background: var(--success);
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.section-header h2 i {
    color: var(--primary);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   UPLOAD AREA
   ============================================ */
.upload-area {
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(114, 9, 183, 0.1));
    border: 3px dashed var(--primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.15), rgba(114, 9, 183, 0.15));
    border-color: var(--primary-light);
    transform: translateY(-5px);
    box-shadow: var(--shadow-primary);
}

.upload-area.dragover {
    border-color: var(--accent);
    background: linear-gradient(135deg, rgba(248, 37, 133, 0.2), rgba(67, 97, 238, 0.2));
    animation: pulse 1s infinite;
}

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

.upload-icon {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.upload-content h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-light);
}

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

.supported-formats {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.format-badge {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.format-badge:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.format-badge i {
    color: var(--primary);
}

/* File Info */
.file-info {
    margin-top: var(--spacing-lg);
    text-align: left;
    animation: fadeIn 0.5s ease;
}

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

.file-preview {
    max-width: 200px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.file-preview img {
    width: 100%;
    height: auto;
    display: block;
}

.file-details {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.file-detail {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.file-detail:last-child {
    margin-bottom: 0;
    border-bottom: none;
}

.file-detail i {
    color: var(--primary);
    width: 20px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(-1px);
}

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

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

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

.btn-outline:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-loader {
    display: none;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.uploading .btn-content {
    display: none;
}

.uploading .btn-loader {
    display: block;
}

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress-container {
    margin-top: var(--spacing-xl);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.progress-text {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-light);
}

.progress-text i {
    color: var(--primary);
}

.progress-percent {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary);
    background: rgba(67, 97, 238, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.progress-bar {
    height: 10px;
    background: var(--bg-input);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 5px;
}

.progress-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.progress-details span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ============================================
   RESULT SECTION
   ============================================ */
.success-message {
    text-align: center;
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.1), rgba(67, 97, 238, 0.1));
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(76, 201, 240, 0.2);
}

.success-icon {
    font-size: 3rem;
    color: var(--success);
    margin-bottom: var(--spacing-md);
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

.success-message h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-light);
}

.success-message p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Image Preview */
.image-preview-container {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.preview-header h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--text-light);
}

.preview-header i {
    color: var(--primary);
}

.image-wrapper {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--bg-primary);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-wrapper img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
    animation: fadeInScale 0.5s ease;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: var(--spacing-md);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.image-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
}

.image-info i {
    color: var(--success);
}

/* Link Section */
.link-section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.link-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.link-header h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--text-light);
}

.link-header i {
    color: var(--primary);
}

.link-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    background: rgba(76, 201, 240, 0.1);
    color: var(--success);
    border-radius: 20px;
    font-weight: 500;
}

.link-container {
    margin-bottom: var(--spacing-xl);
}

.link-input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.link-input {
    flex: 1;
    padding: 1rem 1.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all var(--transition-fast);
}

.link-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.link-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Format Options */
.format-options {
    margin-top: var(--spacing-lg);
}

.format-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.format-label i {
    color: var(--primary);
}

.format-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.format-option {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.format-option.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-primary);
}

/* Details Grid */
.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.detail-card {
    background: var(--bg-input);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

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

.detail-icon {
    width: 48px;
    height: 48px;
    background: rgba(67, 97, 238, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.detail-icon i {
    font-size: 1.2rem;
    color: var(--primary);
}

.detail-content {
    flex: 1;
}

.detail-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.detail-value {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-light);
    word-break: break-all;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

/* Quick Actions */
.quick-actions {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.quick-actions h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-light);
}

.quick-actions i {
    color: var(--accent);
}

.quick-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
}

.quick-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-input);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.quick-action:hover {
    background: var(--bg-hover);
    border-color: var(--primary);
    transform: translateY(-3px);
}

.quick-action i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features-section {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.features-section h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.features-section i {
    color: var(--accent);
}

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

.feature-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    text-align: center;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 1.8rem;
    color: white;
    box-shadow: var(--shadow-primary);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

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

/* ============================================
   INSTRUCTIONS
   ============================================ */
.instructions {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--border-color);
}

.instructions h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.instructions i {
    color: var(--warning);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
    box-shadow: var(--shadow-primary);
}

.step-content h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.step-content i {
    color: var(--primary);
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-color);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.logo-icon-small {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon-small i {
    color: white;
    font-size: 1.2rem;
}

.footer-logo h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-links i {
    font-size: 0.9rem;
}

.footer-info p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.footer-note {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ============================================
   TOAST NOTIFICATION
   ============================================ */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--bg-card);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--primary);
    transform: translateX(400px);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: var(--z-toast);
    max-width: 400px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast.success {
    border-left-color: var(--success);
}

.toast.error {
    border-left-color: var(--danger);
}

.toast.warning {
    border-left-color: var(--warning);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.toast.success .toast-icon::before {
    content: '✓';
    color: var(--success);
}

.toast.error .toast-icon::before {
    content: '✗';
    color: var(--danger);
}

.toast.warning .toast-icon::before {
    content: '⚠';
    color: var(--warning);
}

/* ============================================
   IMAGE MODAL
   ============================================ */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-md);
}

.image-modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: var(--bg-card);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--danger);
    transform: rotate(90deg);
}

.modal-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    display: block;
    border-radius: var(--border-radius);
}

.modal-info {
    position: absolute;
    bottom: -40px;
    left: 0;
    right: 0;
    text-align: center;
    color: white;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.hidden {
    display: none !important;
}

/* ============================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ============================================ */

/* Tablet (768px and up) */
@media (min-width: 768px) {
    .container {
        padding: var(--spacing-xl);
    }
    
    .header {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
    
    .logo-container {
        margin-bottom: 0;
    }
    
    .header-stats {
        margin-top: 0;
    }
    
    .main-card {
        padding: var(--spacing-2xl);
    }
    
    .steps {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .step {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .step-number {
        margin: 0 auto;
    }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
    .container {
        padding: var(--spacing-2xl);
    }
    
    .logo-text h1 {
        font-size: 3rem;
    }
    
    .section-header h2 {
        font-size: 2.5rem;
    }
    
    .upload-area {
        padding: var(--spacing-2xl) var(--spacing-3xl);
    }
    
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Small Mobile (480px and below) */
@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }
    
    .header-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        width: 100%;
        justify-content: center;
    }
    
    .logo-text h1 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .upload-area {
        padding: var(--spacing-lg);
    }
    
    .upload-icon {
        font-size: 3rem;
    }
    
    .upload-content h3 {
        font-size: 1.3rem;
    }
    
    .supported-formats {
        flex-direction: column;
    }
    
    .format-badge {
        width: 100%;
        justify-content: center;
    }
    
    .link-input-group {
        flex-direction: column;
    }
    
    .link-actions {
        justify-content: center;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .details-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .toast {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
        bottom: var(--spacing-sm);
        max-width: none;
    }
}

/* Very Small Mobile (360px and below) */
@media (max-width: 360px) {
    .container {
        padding: 0.75rem;
    }
    
    .main-card {
        padding: 1rem;
    }
    
    .upload-area {
        padding: 1.5rem;
    }
    
    .format-buttons {
        grid-template-columns: 1fr;
    }
    
    .format-option {
        min-width: 100%;
    }
}