/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Custom Properties */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --accent-color: #667eea;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --success-color: #48bb78;
    --error-color: #f56565;
    --warning-color: #ed8936;
    --border-radius: 20px;
    --border-radius-sm: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #667eea 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    position: relative;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 48px;
    color: white;
    padding: 32px 0;
}

.header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #f7fafc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.header h1 i {
    margin-right: 16px;
    /*filter: drop-shadow(0 2px 8px rgba(102, 126, 234, 0.4));*/
}

.header p {
    font-size: 1.25rem;
    font-weight: 400;
    opacity: 0.95;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

/* Main Content */
.main-content {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    padding: 48px;
    box-shadow: var(--glass-shadow);
    margin-bottom: 48px;
    position: relative;
    overflow: hidden;
}

.main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
}

.main-content::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 20%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* Upload Section */
.upload-section {
    margin-bottom: 36px;
}

.upload-area {
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-sm);
    padding: 80px 32px;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(transparent, rgba(255,255,255,0.1), transparent);
    animation: rotate 4s linear infinite;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.upload-area:hover {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.2);
}

.upload-area:hover::before {
    opacity: 1;
}

.upload-area.drag-over {
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.02) translateY(-2px);
    box-shadow: 0 16px 50px rgba(102, 126, 234, 0.3);
}

.upload-area.drag-over::before {
    opacity: 1;
}

.upload-icon {
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 24px;
    filter: drop-shadow(0 4px 12px rgba(102, 126, 234, 0.3));
    position: relative;
    z-index: 1;
}

.upload-area h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.95);
    position: relative;
    z-index: 1;
    letter-spacing: -0.01em;
}

.upload-area p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.125rem;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
    font-weight: 400;
}

.file-types {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    position: relative;
    z-index: 1;
    font-weight: 500;
    letter-spacing: 0.025em;
}

/* File List */
.file-list {
    margin: 36px 0;
    padding: 24px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.file-list h4 {
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    margin: 12px 0;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.file-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(255,255,255,0.4));
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.file-icon {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.5rem;
    filter: drop-shadow(0 2px 4px rgba(102, 126, 234, 0.3));
}

.file-details h5 {
    margin: 0;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 500;
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.file-details p {
    margin: 4px 0 0 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    font-weight: 400;
}

.remove-file {
    background: rgba(245, 101, 101, 0.1);
    border: 1px solid rgba(245, 101, 101, 0.2);
    color: rgba(245, 101, 101, 0.9);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-file:hover {
    background: rgba(245, 101, 101, 0.2);
    border-color: rgba(245, 101, 101, 0.4);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(245, 101, 101, 0.2);
}

.remove-file:active {
    transform: scale(0.95);
}

/* Buttons */
.action-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin: 36px 0;
}

.btn {
    padding: 16px 32px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    letter-spacing: 0.025em;
}

.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 ease;
}

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

.btn-primary {
    background: rgba(102, 126, 234, 0.8);
    color: white;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
}

.btn-primary:hover {
    background: rgba(102, 126, 234, 0.9);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.3);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-primary i {
    color: white !important;
    opacity: 1;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

.btn-secondary {
    background: rgba(108, 117, 125, 0.6);
    color: white;
    box-shadow: 0 8px 20px rgba(108, 117, 125, 0.2);
}

.btn-secondary:hover {
    background: rgba(108, 117, 125, 0.8);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(108, 117, 125, 0.3);
}

.btn-secondary:active {
    transform: translateY(-1px);
}

.btn-secondary i {
    color: white !important;
    opacity: 1;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

.btn-success {
    background: rgba(72, 187, 120, 0.8);
    color: white;
    box-shadow: 0 8px 20px rgba(72, 187, 120, 0.2);
}

.btn-success:hover {
    background: rgba(72, 187, 120, 0.9);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(72, 187, 120, 0.3);
}

.btn-success:active {
    transform: translateY(-1px);
}

.btn-success i {
    color: white !important;
    opacity: 1;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

/* Progress Section */
.progress-section {
    text-align: center;
    padding: 48px 32px;
}

.progress-section h4 {
    margin-bottom: 32px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.progress-section h4 i {
    filter: drop-shadow(0 2px 8px rgba(102, 126, 234, 0.4));
}

.progress-bar {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 6px;
    overflow: hidden;
    margin: 32px auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, rgba(255,255,255,0.8), rgba(102, 126, 234, 0.9), rgba(118, 75, 162, 0.9));
    width: 0%;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 6px;
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: progressShine 1.5s ease-in-out infinite;
}

@keyframes progressShine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    font-weight: 500;
    margin-top: 20px;
    letter-spacing: 0.025em;
}

/* Results Section */
.results-section {
    text-align: center;
    padding: 48px 32px;
}

.result-success {
    color: rgba(255, 255, 255, 0.95);
    background: rgba(72, 187, 120, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 40px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(72, 187, 120, 0.3);
    position: relative;
    overflow: hidden;
}

.result-success::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(72, 187, 120, 0.6), transparent);
}

.result-success i {
    font-size: 4rem;
    margin-bottom: 20px;
    color: rgba(72, 187, 120, 0.9);
    filter: drop-shadow(0 4px 12px rgba(72, 187, 120, 0.3));
    animation: successPulse 2s ease-in-out infinite;
}

@keyframes successPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.result-success h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.95);
}

.result-success p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 24px;
}

.result-error {
    color: rgba(255, 255, 255, 0.95);
    background: rgba(245, 101, 101, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 40px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(245, 101, 101, 0.3);
    position: relative;
    overflow: hidden;
}

.result-error::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(245, 101, 101, 0.6), transparent);
}

.result-error i {
    font-size: 4rem;
    margin-bottom: 20px;
    color: rgba(245, 101, 101, 0.9);
    filter: drop-shadow(0 4px 12px rgba(245, 101, 101, 0.3));
    animation: errorShake 0.5s ease-in-out;
}

@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.result-error h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.95);
}

.result-error p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 24px;
}

/* Information Section */
.info-section {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    padding: 48px;
    box-shadow: var(--glass-shadow);
    margin-bottom: 48px;
    position: relative;
    overflow: hidden;
}

.info-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
}

.info-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.info-section h3 {
    text-align: center;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.95);
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.info-section h3 i {
    margin-right: 12px;
    filter: drop-shadow(0 2px 8px rgba(102, 126, 234, 0.4));
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 40px;
    position: relative;
    z-index: 1;
}

.info-item {
    text-align: center;
    padding: 36px 24px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.info-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(255,255,255,0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.info-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
}

.info-item:hover::before {
    opacity: 1;
}

.info-item i {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 24px;
    filter: drop-shadow(0 4px 12px rgba(102, 126, 234, 0.3));
    position: relative;
    z-index: 1;
}

.info-item h4 {
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.info-item p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    font-size: 1rem;
    position: relative;
    z-index: 1;
}

/* Footer */
.footer {
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    padding: 32px 0;
    position: relative;
}

.footer p {
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.025em;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 20px;
    }

    .main-content,
    .info-section {
        padding: 36px;
    }

    .info-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    .header {
        padding: 24px 0;
        margin-bottom: 32px;
    }

    .header h1 {
        font-size: 2.5rem;
    }

    .header p {
        font-size: 1.125rem;
    }

    .main-content,
    .info-section {
        padding: 24px;
        margin-bottom: 32px;
    }

    .upload-area {
        padding: 60px 20px;
    }

    .upload-icon {
        font-size: 4rem;
    }

    .upload-area h3 {
        font-size: 1.75rem;
    }

    .file-list,
    .progress-section,
    .results-section {
        padding: 32px 20px;
    }

    .action-buttons {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .btn {
        width: 240px;
        justify-content: center;
    }

    .info-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .info-section h3 {
        font-size: 1.875rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 12px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .main-content,
    .info-section {
        padding: 20px;
    }

    .upload-area {
        padding: 40px 16px;
    }

    .btn {
        width: 200px;
        padding: 14px 24px;
    }

    .progress-bar {
        max-width: 280px;
    }
}

/* Enhanced Animation Classes */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.slide-in-right {
    animation: slideInRight 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.scale-in {
    animation: scaleIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

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

.float {
    animation: float 3s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(102, 126, 234, 0.2);
    }
    50% {
        box-shadow: 0 0 20px rgba(102, 126, 234, 0.4), 0 0 30px rgba(102, 126, 234, 0.3);
    }
}

.glow {
    animation: glow 2s ease-in-out infinite;
}

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

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left: 4px solid rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: rgba(255, 255, 255, 0.95);
    padding: 20px 24px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    z-index: 1000;
    max-width: 350px;
    word-wrap: break-word;
    animation: slideInRight 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: right center;
}

.notification.error {
    border-color: rgba(245, 101, 101, 0.3);
    background: rgba(245, 101, 101, 0.1);
}

.notification.success {
    border-color: rgba(72, 187, 120, 0.3);
    background: rgba(72, 187, 120, 0.1);
}

.notification h4 {
    margin: 0 0 8px 0;
    font-size: 1rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
}

.notification p {
    margin: 0;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.4;
}

.notification button {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
    font-size: 1.25rem;
    line-height: 1;
}

.notification button:hover {
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.1);
}

/* Stagger Animation for File Items */
.file-item:nth-child(1) { animation-delay: 0.1s; }
.file-item:nth-child(2) { animation-delay: 0.2s; }
.file-item:nth-child(3) { animation-delay: 0.3s; }
.file-item:nth-child(4) { animation-delay: 0.4s; }
.file-item:nth-child(5) { animation-delay: 0.5s; }

/* Hover Effects for Interactive Elements */
.main-content:hover::after,
.info-section:hover::after {
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

/* Focus States for Accessibility */
.btn:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

.upload-area:focus-within {
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

/* Smooth State Transitions */
.upload-section,
.file-list,
.action-buttons,
.progress-section,
.results-section {
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}