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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1d1d1f;
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f7 50%, #e8e8ed 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(248, 248, 248, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    height: 96px;
    width: auto;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
}

.logo:hover {
    transform: scale(1.08);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
}

.logo-text {
    font-size: 2rem;
    font-weight: 600;
    color: #1d1d1f;
    letter-spacing: -0.04em;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    background: linear-gradient(135deg, #007AFF, #5856D6, #AF52DE);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: logoTextShimmer 4s ease-in-out infinite, logoTextFloat 6s ease-in-out infinite 0.5s;
    position: relative;
}

.logo-text::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #007AFF, #5856D6);
    transition: width 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 1px;
}

.logo-text:hover::after {
    width: 100%;
}

@keyframes logoTextShimmer {
    0%, 100% { 
        background-position: 0% 50%; 
    }
    50% { 
        background-position: 100% 50%; 
    }
}

@keyframes logoTextFloat {
    0%, 100% { 
        transform: translateY(0px); 
    }
    50% { 
        transform: translateY(-2px); 
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: #1d1d1f;
    font-weight: 400;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    opacity: 0.8;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #007AFF, #5856D6);
    transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 1px;
}

.nav-link:hover {
    color: #007AFF;
    opacity: 1;
    transform: translateY(-1px);
}

.nav-link:hover::after {
    width: 100%;
}

/* Language Selector */
.language-selector {
    display: flex;
    background: rgba(255, 255, 255, 0.8);
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.lang-btn {
    background: transparent;
    border: none;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: #1d1d1f;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.lang-btn.active {
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
}

.lang-btn:hover:not(.active) {
    background: rgba(0, 122, 255, 0.1);
    color: #007AFF;
}

/* Admin Webhook Switch */
.admin-switch {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(255, 69, 0, 0.3);
    border-radius: 20px;
    padding: 0.5rem 1rem;
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 16px rgba(255, 69, 0, 0.2);
    animation: adminPulse 2s ease-in-out infinite;
}

@keyframes adminPulse {
    0%, 100% { 
        box-shadow: 0 4px 16px rgba(255, 69, 0, 0.2);
        border-color: rgba(255, 69, 0, 0.3);
    }
    50% { 
        box-shadow: 0 6px 20px rgba(255, 69, 0, 0.4);
        border-color: rgba(255, 69, 0, 0.5);
    }
}

.switch-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.switch-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #ff4500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mode-switch {
    display: flex;
    background: rgba(255, 69, 0, 0.1);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255, 69, 0, 0.2);
}

.mode-btn {
    background: transparent;
    border: none;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #ff4500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    letter-spacing: 0.5px;
}

.mode-btn.active {
    background: #ff4500;
    color: white;
    box-shadow: 0 2px 8px rgba(255, 69, 0, 0.3);
}

.mode-btn:hover:not(.active) {
    background: rgba(255, 69, 0, 0.2);
}

.cta-button {
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: 25px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
    background: linear-gradient(135deg, #0056CC, #4C44CC);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: #1d1d1f;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 2px;
}

/* Main Content */
.main-content {
    padding-top: 100px;
    min-height: 100vh;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #007AFF, #5856D6, #AF52DE);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.page-header p {
    font-size: 1.125rem;
    color: #86868b;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse 2s infinite;
}

.status-dot.uploading {
    background: #f59e0b;
}

.status-dot.error {
    background: #ef4444;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Upload Section */
.upload-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.upload-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Upload Area */
.upload-area {
    background: white;
    border: 3px dashed #cbd5e1;
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.1), transparent);
    transition: left 0.5s;
}

.upload-area:hover {
    border-color: #0ea5e9;
    background: #f0f9ff;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(14, 165, 233, 0.1);
}

.upload-area:hover::before {
    left: 100%;
}

.upload-area.drag-over {
    border-color: #0ea5e9;
    background: #f0f9ff;
    transform: scale(1.02);
}

.upload-icon {
    color: #94a3b8;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.upload-area:hover .upload-icon {
    color: #0ea5e9;
    transform: scale(1.1);
}

.upload-area h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.upload-area p {
    color: #718096;
    margin-bottom: 1.5rem;
}

.file-types {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.file-type {
    background: linear-gradient(135deg, #0ea5e9, #3b82f6);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Upload Options */
.upload-options {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #e2e8f0;
}

.option-group {
    margin-bottom: 1.5rem;
}

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

.option-group label {
    display: block;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.5rem;
}

.option-group input,
.option-group select,
.option-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
}

.option-group input:focus,
.option-group select:focus,
.option-group textarea:focus {
    outline: none;
    border-color: #0ea5e9;
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.option-group textarea {
    resize: vertical;
}

/* File Queue */
.file-queue-container {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #e2e8f0;
}

.file-queue-container h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

.queue-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.primary-button {
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
    border: none;
    padding: 0.875rem 1.75rem;
    border-radius: 14px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.25);
}

.primary-button:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.35);
    background: linear-gradient(135deg, #0056CC, #4C44CC);
}

.primary-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.secondary-button {
    background: rgba(255, 255, 255, 0.8);
    color: #1d1d1f;
    border: 2px solid rgba(0, 0, 0, 0.1);
    padding: 0.875rem 1.75rem;
    border-radius: 14px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.secondary-button:hover {
    background: rgba(255, 255, 255, 1);
    border-color: #007AFF;
    color: #007AFF;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.file-queue {
    max-height: 400px;
    overflow-y: auto;
}

.queue-placeholder {
    text-align: center;
    padding: 2rem;
    color: #9ca3af;
}

.placeholder-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.file-item {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

.file-item:hover {
    background: #f1f5f9;
    transform: translateX(4px);
}

.file-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.file-details h4 {
    font-weight: 600;
    color: #2d3748;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.file-meta {
    font-size: 0.8rem;
    color: #718096;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.file-action-btn {
    background: none;
    border: none;
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.file-action-btn:hover {
    background: #e2e8f0;
}

.file-action-btn.remove {
    color: #ef4444;
}

.file-action-btn.remove:hover {
    background: #fef2f2;
}

.file-progress {
    margin-top: 0.5rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #0ea5e9, #3b82f6);
    transition: width 0.3s ease;
    border-radius: 3px;
}

.progress-text {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.25rem;
    font-size: 0.8rem;
    color: #718096;
}

.file-status {
    margin-top: 0.5rem;
    padding: 0.5rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
}

.file-status.success {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.file-status.error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* History Section */
.history-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #e2e8f0;
    margin-bottom: 3rem;
}

.history-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

.history-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.history-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    font-size: 0.9rem;
    color: #718096;
}

.stat strong {
    color: #2d3748;
}

.history-actions {
    display: flex;
    gap: 1rem;
}

.upload-history {
    max-height: 400px;
    overflow-y: auto;
}

.history-placeholder {
    text-align: center;
    padding: 2rem;
    color: #9ca3af;
}

.history-item {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

.history-item:hover {
    background: #f1f5f9;
    transform: translateX(4px);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.history-file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.history-status {
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
}

.status-success {
    background: #d1fae5;
    color: #065f46;
}

.status-error {
    background: #fee2e2;
    color: #991b1b;
}

.status-pending {
    background: #fef3c7;
    color: #92400e;
}

.history-time {
    font-size: 0.8rem;
    color: #718096;
}

.history-details {
    font-size: 0.85rem;
    color: #718096;
}

/* Info Section */
.info-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #e2e8f0;
    margin-bottom: 3rem;
}

.info-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 2rem;
    text-align: center;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.info-card {
    background: #f8fafc;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.info-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.info-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.info-card p {
    color: #718096;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.info-card ul {
    list-style: none;
    text-align: left;
}

.info-card ul li {
    color: #718096;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.info-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* Progress Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid #e2e8f0;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #718096;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: #f1f5f9;
    color: #2d3748;
}

.modal-body {
    padding: 2rem;
}

.overall-progress {
    margin-bottom: 2rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.progress-info span {
    font-weight: 500;
    color: #2d3748;
}

.file-progress-list {
    max-height: 300px;
    overflow-y: auto;
}

.file-progress-item {
    background: #f8fafc;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.file-progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.file-progress-name {
    font-weight: 500;
    color: #2d3748;
}

.file-progress-status {
    font-size: 0.8rem;
    color: #718096;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 100px;
    right: 2rem;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: white;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-left: 4px solid #10b981;
    min-width: 300px;
    animation: slideInRight 0.3s ease-out;
}

.toast.error {
    border-left-color: #ef4444;
}

.toast.warning {
    border-left-color: #f59e0b;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .upload-section {
        grid-template-columns: 1fr;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

/* iPad specific navigation adjustments */
@media screen and (min-width: 768px) and (max-width: 1024px) {
    .nav-container {
        padding: 0.75rem 1.5rem;
    }
    
    .logo {
        height: 72px;
    }
    
    .logo-text {
        font-size: 1.5rem;
    }
    
    .nav-menu {
        gap: 1.5rem;
    }
    
    .nav-link {
        font-size: 0.9rem;
    }
    
    .cta-button {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .language-selector {
        margin: 0 0.5rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 1rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .language-selector {
        margin: 0.5rem 0;
    }

    .container {
        padding: 0 1rem;
    }

    .upload-container {
        gap: 1.5rem;
    }

    .upload-area {
        padding: 2rem 1rem;
    }

    .queue-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .history-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .history-stats {
        justify-content: space-between;
    }

    .history-actions {
        justify-content: stretch;
    }

    .modal-content {
        width: 95%;
        margin: 1rem;
    }

    .modal-header,
    .modal-body {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding-top: 80px;
    }

    .page-header {
        padding: 1rem 0;
    }

    .upload-area {
        padding: 1.5rem 1rem;
    }

    .file-types {
        flex-wrap: wrap;
    }

    .history-stats {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.spinning {
    animation: spin 1s linear infinite;
}

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