/* eCDN Modern Dark Theme */
:root {
    --primary-color: #6366f1;
    --primary-hover: #5855f7;
    --secondary-color: #8b5cf6;
    --background-color: #0f0f23;
    --surface-color: #1a1a2e;
    --surface-hover: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-color: #27272a;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--background-color) 0%, #1a1a2e 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

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

/* Header */
header {
    text-align: center;
    margin-bottom: 3rem;
}

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

.logo i {
    font-size: 3rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: none;
}

.tagline p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* Upload Section */
.upload-section {
    background: var(--surface-color);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 3rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 0.75rem;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(99, 102, 241, 0.05);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.15);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-area h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.upload-area p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.paste-hint {
    color: var(--text-muted) !important;
    font-size: 0.9rem !important;
    margin-top: 0.5rem;
    opacity: 0.8;
}

.paste-hint i {
    margin-right: 0.3rem;
}

/* Progress */
.upload-progress {
    text-align: center;
    padding: 2rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

/* Upload Result */
.upload-result {
    text-align: center;
    padding: 2rem;
}

.upload-result h3 {
    color: var(--success-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.result-preview {
    margin-bottom: 1.5rem;
}

.result-preview img {
    border: 2px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.result-item {
    display: flex;
    gap: 0.5rem;
    max-width: 500px;
    margin: 0 auto 1.5rem auto;
}

.result-item input {
    flex: 1;
    padding: 0.75rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.9rem;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--primary-color);
    border: none;
    border-radius: 0.5rem;
    color: white;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.copy-btn:hover {
    background: var(--primary-hover);
}

.file-info {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    max-width: 400px;
    margin: 0 auto;
    text-align: left;
}

.file-info p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.file-info p:last-child {
    margin-bottom: 0;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 0.75rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.feature i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.feature p {
    color: var(--text-secondary);
}

/* ShareX Section */
.sharex-section {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 0.75rem;
    text-align: center;
    margin-bottom: 3rem;
    border: 1px solid var(--border-color);
}

.sharex-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.sharex-section p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.sharex-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sharex-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
}

/* Footer */
footer {
    text-align: center;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

footer p {
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
    
    .upload-area {
        padding: 2rem 1rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.upload-result, .upload-progress {
    animation: fadeIn 0.5s ease;
}

/* Loading spinner */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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