/* Universal File Converter - Glassmorphic Dark UI */

:root {
    --primary: #667eea;
    --secondary: #5a67d8;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Inter, sans-serif;
    overflow-x: hidden;
}

/* Main Container */
.ufc-glass-container {
    min-height: 100vh;
    background: #333;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
}

/* Animated Background */
.ufc-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.ufc-liquid-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    animation: liquidFloat 20s ease-in-out infinite;
    opacity: 0.3;
}

.ufc-blob-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(45deg, #444, #555);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.ufc-blob-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #555, #666);
    top: 50%;
    right: 10%;
    animation-delay: 7s;
}

.ufc-blob-3 {
    width: 250px;
    height: 250px;
    background: linear-gradient(225deg, #666, #777);
    bottom: 20%;
    left: 30%;
    animation-delay: 14s;
}

@keyframes liquidFloat {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg) scale(1);
    }
    25% {
        transform: translate(30px, -50px) rotate(90deg) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) rotate(180deg) scale(0.9);
    }
    75% {
        transform: translate(50px, 10px) rotate(270deg) scale(1.05);
    }
}

.ufc-gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(90, 103, 216, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(100, 100, 100, 0.03) 0%, transparent 50%);
    animation: gradientShift 15s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 0.4; }
}

/* Glass Card */
.ufc-glass-card {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 900px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--glass-shadow);
    padding: 40px;
    transition: var(--transition);
}

.ufc-glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Header */
.ufc-glass-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.ufc-logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.ufc-logo-icon {
    font-size: 4rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logoSpin 8s linear infinite;
}

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

.ufc-logo-text h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 10px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.ufc-logo-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* Conversion Interface */
.ufc-conversion-interface {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

/* Upload Section */
.ufc-upload-section {
    position: relative;
}

.ufc-upload-glass {
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
}

.ufc-upload-glass::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.1), 
        transparent
    );
    transition: left 0.6s;
}

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

.ufc-upload-glass:hover,
.ufc-upload-glass.ufc-drag-over {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.2);
}

.ufc-upload-glass.ufc-drag-over {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    box-shadow: 0 15px 35px rgba(16, 185, 129, 0.3);
}

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

.ufc-upload-icon {
    color: var(--primary);
    margin-bottom: 20px;
    opacity: 0.8;
    transition: var(--transition);
}

.ufc-upload-glass:hover .ufc-upload-icon {
    opacity: 1;
    transform: scale(1.1);
}

.ufc-upload-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.ufc-upload-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 20px;
}

.ufc-click-text {
    color: var(--primary);
    cursor: pointer;
    text-decoration: underline;
    transition: var(--transition);
}

.ufc-click-text:hover {
    color: var(--text-primary);
}

.ufc-supported-formats {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ufc-format-badge {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.ufc-format-badge:hover {
    background: rgba(102, 126, 234, 0.2);
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Upload Progress Overlay */
.ufc-upload-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.ufc-upload-progress {
    text-align: center;
    color: var(--text-primary);
}

.ufc-progress-ring {
    position: relative;
    margin-bottom: 15px;
}

.ufc-progress-svg {
    transform: rotate(-90deg);
}

.ufc-progress-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 3;
}

.ufc-progress-fill {
    fill: none;
    stroke: url(#progressGradient);
    stroke-width: 3;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.3s ease;
}

.ufc-progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
}

.ufc-progress-message {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 10px;
}

/* Controls Section */
.ufc-controls-section {
    display: grid;
    gap: 25px;
}

/* File Info */
.ufc-file-info-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 20px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.ufc-file-info-glass.ufc-slide-in {
    opacity: 1;
    transform: translateY(0);
}

.ufc-file-preview {
    display: flex;
    align-items: center;
    gap: 15px;
}

.ufc-file-icon {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ufc-file-details {
    flex: 1;
    min-width: 0;
}

.ufc-file-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
    word-break: break-word;
}

.ufc-file-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.ufc-separator {
    opacity: 0.5;
}

.ufc-remove-btn {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ufc-remove-btn:hover {
    background: rgba(239, 68, 68, 0.3);
    transform: scale(1.1);
}

/* Format Selection */
.ufc-format-section {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    align-items: end;
}

.ufc-format-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ufc-format-display,
.ufc-format-dropdown-wrapper {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 14px 16px;
    transition: var(--transition);
}

.ufc-format-display {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 50px;
}

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

.ufc-format-text {
    color: var(--text-primary);
    font-weight: 500;
}

.ufc-format-arrow {
    color: var(--primary);
    padding: 10px;
    animation: arrowPulse 2s ease-in-out infinite;
}

@keyframes arrowPulse {
    0%, 100% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.1); opacity: 1; }
}

.ufc-format-dropdown-wrapper {
    position: relative;
    cursor: pointer;
}

.ufc-format-dropdown {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    outline: none;
    appearance: none;
    padding-right: 30px;
}

.ufc-format-dropdown:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.ufc-dropdown-arrow {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition);
}

.ufc-format-dropdown:focus + .ufc-dropdown-arrow {
    color: var(--primary);
    transform: translateY(-50%) rotate(180deg);
}

/* Convert Button */
.ufc-convert-section {
    text-align: center;
}

.ufc-convert-button {
    background: linear-gradient(135deg, var(--success), #059669);
    border: none;
    color: white;
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
    position: relative;
    overflow: hidden;
    min-width: 200px;
}

.ufc-convert-button:disabled {
    background: rgba(255, 255, 255, 0.1);
    cursor: not-allowed;
    box-shadow: none;
    opacity: 0.5;
}

.ufc-convert-button:not(:disabled):hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(16, 185, 129, 0.4);
}

.ufc-convert-button.ufc-ready {
    animation: readyPulse 2s infinite;
}

@keyframes readyPulse {
    0%, 100% { box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3); }
    50% { box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6), 0 0 0 10px rgba(16, 185, 129, 0.1); }
}

.ufc-btn-content,
.ufc-btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.ufc-btn-icon {
    transition: var(--transition);
}

.ufc-convert-button:hover .ufc-btn-icon {
    transform: rotate(360deg);
}

.ufc-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Results Section */
.ufc-results-section,
.ufc-error-section {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    margin-top: 20px;
    animation: slideInUp 0.5s var(--bounce);
}

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

.ufc-success-animation,
.ufc-error-animation {
    margin-bottom: 20px;
}

.ufc-success-checkmark,
.ufc-error-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--success), #059669);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    animation: bounceIn 0.6s var(--bounce);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

.ufc-error-icon {
    background: linear-gradient(135deg, var(--error), #dc2626);
    box-shadow: 0 10px 30px rgba(239, 68, 68, 0.3);
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.ufc-success-title,
.ufc-error-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.ufc-success-message,
.ufc-error-message {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 30px;
}

.ufc-download-actions,
.ufc-error-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.ufc-download-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: white;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.ufc-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
    text-decoration: none;
    color: white;
}

.ufc-convert-another,
.ufc-retry-btn,
.ufc-new-file-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.ufc-convert-another:hover,
.ufc-retry-btn:hover,
.ufc-new-file-btn:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: var(--primary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Features Sidebar */
.ufc-features-sidebar {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.ufc-feature-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 220px;
    transition: var(--transition);
}

.ufc-feature-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-5px);
}

.ufc-feature-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ufc-feature-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.ufc-feature-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Toast Notification */
.ufc-toast-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    min-width: 300px;
    transform: translateX(400px);
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.ufc-toast-notification.ufc-show {
    transform: translateX(0);
}

.ufc-toast-success {
    border-left: 4px solid var(--success);
}

.ufc-toast-error {
    border-left: 4px solid var(--error);
}

.ufc-toast-content {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.ufc-toast-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--success), #059669);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    color: white;
    flex-shrink: 0;
}

.ufc-toast-error .ufc-toast-icon {
    background: linear-gradient(135deg, var(--error), #dc2626);
}

.ufc-toast-message {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
}

.ufc-toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
    flex-shrink: 0;
}

.ufc-toast-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .ufc-features-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .ufc-glass-container {
        padding: 15px;
        align-items: flex-start;
        padding-top: 30px;
    }
    
    .ufc-glass-card {
        padding: 30px 20px;
        margin: 0;
        min-height: auto;
    }
    
    .ufc-logo-section {
        flex-direction: column;
        gap: 15px;
    }
    
    .ufc-logo-text h1 {
        font-size: 2rem;
    }
    
    .ufc-format-section {
        grid-template-columns: 1fr;
        gap: 15px;
        text-align: center;
    }
    
    .ufc-format-arrow {
        transform: rotate(90deg);
    }
    
    .ufc-upload-glass {
        padding: 40px 20px;
    }
    
    .ufc-file-preview {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .ufc-download-actions,
    .ufc-error-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .ufc-download-btn,
    .ufc-convert-another,
    .ufc-retry-btn,
    .ufc-new-file-btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }
    
    .ufc-toast-notification {
        right: 15px;
        left: 15px;
        min-width: auto;
        transform: translateY(-100px);
    }
    
    .ufc-toast-notification.ufc-show {
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .ufc-glass-card {
        padding: 25px 15px;
        border-radius: 20px;
    }
    
    .ufc-logo-text h1 {
        font-size: 1.8rem;
    }
    
    .ufc-upload-glass {
        padding: 30px 15px;
    }
    
    .ufc-supported-formats {
        flex-direction: column;
        align-items: center;
    }
    
    .ufc-format-badge {
        width: fit-content;
    }
}

/* SVG Gradient Definition */
svg defs {
    position: absolute;
    width: 0;
    height: 0;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}