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

:root {
    /* Ultra-modern color palette with gradient accents */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --primary-hover: #5a67d8;
    --primary-light: rgba(102, 126, 234, 0.08);
    --primary-glow: rgba(102, 126, 234, 0.4);
    
    --accent-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-color: #f093fb;
    
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --card-bg: #ffffff;
    --card-hover: #fcfcfd;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    --shadow-glow: 0 0 50px rgba(102, 126, 234, 0.3);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Dark mode - Elegant and sophisticated */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        --primary-color: #818cf8;
        --primary-hover: #6366f1;
        --primary-light: rgba(129, 140, 248, 0.1);
        --primary-glow: rgba(129, 140, 248, 0.5);
        
        --accent-gradient: linear-gradient(135deg, #ec4899 0%, #f472b6 100%);
        --accent-color: #ec4899;
        
        --bg-color: #030712;
        --bg-secondary: #111827;
        --card-bg: #0f172a;
        --card-hover: #1e293b;
        
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-tertiary: #64748b;
        
        --border-color: #1e293b;
        --border-light: #0f172a;
        
        --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.2);
        --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.3), 0 1px 2px -1px rgb(0 0 0 / 0.3);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
        --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.6), 0 8px 10px -6px rgb(0 0 0 / 0.6);
        --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.8);
        
        --shadow-glow: 0 0 60px rgba(129, 140, 248, 0.4);
    }
}

/* Base styles with improved typography */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    position: relative;
    overflow-x: hidden;
}

/* Animated background gradient */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, var(--primary-light) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, var(--accent-color) 0%, transparent 50%);
    opacity: 0.03;
    animation: backgroundFloat 20s ease-in-out infinite;
    pointer-events: none;
    z-index: -1; /* Changed to -1 to ensure it's behind everything */
}

@keyframes backgroundFloat {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* Ultra-modern header with animated gradient */
header {
    text-align: center;
    padding: 60px 0 48px;
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: var(--primary-gradient);
    filter: blur(200px);
    opacity: 0.2;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.2; transform: translateX(-50%) scale(1); }
    50% { opacity: 0.3; transform: translateX(-50%) scale(1.05); }
}

header h1 {
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    position: relative;
    display: inline-block;
    animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.2); }
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.2s;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 32px;
    animation: fadeInUp 0.8s ease forwards 0.4s;
    opacity: 0;
}

/* Enhanced translation container with glass morphism */
.translation-container {
    display: grid;
    grid-template-columns: minmax(420px, 1fr) auto minmax(420px, 1fr);
    gap: 24px;
    align-items: stretch;
    width: 100%;
}

.text-box-wrapper {
    display: flex;
    flex-direction: column;
}

.text-box {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    box-shadow: var(--shadow-lg);
    overflow: visible;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: var(--transition);
    border: 1px solid var(--border-light);
    border-bottom: none;
    min-height: 360px;
}

.text-content {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Enhanced language selector with subtle animations */
.language-selector,
.language-display {
    background: var(--bg-secondary);
    padding: 20px 24px;
    display: flex;
    gap: 12px;
    border-bottom: 1px solid var(--border-light);
    align-items: center;
    min-height: 72px;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.language-display {
    font-weight: 700;
    color: var(--text-primary);
    justify-content: center;
    font-size: 16px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

/* Ultra-modern button styles */
.lang-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-light);
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}


.lang-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-color);
}

.lang-btn.active {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
    font-weight: 600;
}

/* Enhanced textarea with smooth focus transitions */
textarea {
    border: none;
    outline: none !important;
    resize: none;
    padding: 32px;
    font-size: 17px;
    font-family: inherit;
    line-height: 1.4;
    color: var(--text-primary);
    min-height: 288px;
    background: transparent;
    overflow-y: auto;
    height: 288px;
    display: block;
    width: 100%;
    transition: var(--transition);
}

textarea:focus {
    outline: none !important;
    box-shadow: none !important;
}

textarea::placeholder {
    color: var(--text-tertiary);
    transition: var(--transition);
}

textarea:focus::placeholder {
    opacity: 0.5;
    transform: translateX(4px);
}

/* Floating character count */
.char-count {
    position: absolute;
    bottom: 20px;
    right: 32px;
    font-size: 13px;
    color: var(--text-tertiary);
    background: var(--bg-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    white-space: nowrap; /* Prevent line breaks */
    display: inline-flex; /* Ensure inline display */
    align-items: center;
    gap: 4px;
}

/* Removed char count hover effect */

/* Ultra-modern swap button with animation */
.translate-btn-container {
    display: flex;
    align-items: center;
    justify-content: center;
    align-self: center;
    margin: 0 -20px;
}

.swap-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: none;
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    transition: var(--transition-spring);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl), 0 0 40px var(--primary-glow);
    position: relative;
    overflow: hidden;
}

.swap-btn::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
    transform: rotate(45deg);
    transition: transform 0.6s;
}

.swap-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-2xl), 0 0 60px var(--primary-glow);
}

.swap-btn:hover::before {
    transform: rotate(45deg) translateX(100%);
}

.swap-btn:active {
    transform: scale(1.05);
}

.swap-btn svg {
    width: 28px;
    height: 28px;
    position: relative;
    z-index: 1;
}

/* Beautiful output text area */
.output-text {
    padding: 32px;
    min-height: 288px;
    height: 288px;
    flex: 1;
    overflow-y: auto;
    font-size: 17px;
    line-height: 1.4;
    background: transparent;
    transition: var(--transition);
}

.output-text .placeholder,
.output-text.placeholder {
    color: var(--text-tertiary);
    font-style: italic;
}


/* Modern TTS button */
.tts-btn {
    width: 42px;
    height: 42px;
    padding: 0;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex !important;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    position: relative;
    flex-shrink: 0;
}

.tts-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.tts-btn:hover {
    background: var(--card-hover);
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 0 20px var(--primary-glow);
}

.tts-btn.playing {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md), 0 0 30px var(--primary-glow);
    animation: subtlePulse 2s ease-in-out infinite;
}

@keyframes subtlePulse {
    0%, 100% { box-shadow: var(--shadow-md), 0 0 30px var(--primary-glow); }
    50% { box-shadow: var(--shadow-lg), 0 0 40px var(--primary-glow); }
}

/* Unified text actions style */
.text-actions {
    display: flex;
    gap: 12px;
    padding: 16px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-top: none;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    box-shadow: var(--shadow-lg);
    align-items: center;
    min-height: 64px;
    margin-bottom: 24px;
}

/* Enhanced clear button */
.clear-btn-inside {
    position: absolute;
    top: 16px;
    right: 20px;
    width: 36px;
    height: 36px;
    background: var(--card-bg);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-secondary);
    z-index: 2;
    opacity: 0;
    visibility: hidden;
}

.text-box:hover .clear-btn-inside {
    opacity: 1;
    visibility: visible;
}

.clear-btn-inside:hover {
    background: var(--error-color);
    border-color: var(--error-color);
    color: white;
    transform: scale(1.05);
}

.clear-btn-inside svg {
    width: 16px;
    height: 16px;
}

/* Beautiful copy button */
.copy-btn {
    flex: 1;
    padding: 10px 20px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex !important;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    letter-spacing: 0.01em;
    position: relative;
    overflow: hidden;
}

.copy-btn:hover {
    box-shadow: var(--shadow-lg), 0 0 30px var(--primary-glow);
}

.copy-btn.copied {
    background: linear-gradient(135deg, var(--success-color), #059669);
}



.copy-btn svg {
    position: relative;
    z-index: 1;
}

.copy-btn span {
    position: relative;
    z-index: 1;
}

/* Enhanced error message */
.error-message {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    border: 2px solid var(--error-color);
    color: var(--error-color);
    padding: 20px 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Loading state completely hidden */
.loading {
    display: none !important;
}

/* Ensure buttons stay visible */
.tts-btn.loading {
    opacity: 0.7;
    display: flex !important;
}

/* Remove outline on all interactive elements */
button:focus,
textarea:focus {
    outline: none !important;
}

/* Enhanced file upload button */
.upload-btn {
    padding: 10px 20px;
    background: var(--card-bg);
    color: var(--text-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    font-weight: 600;
    gap: 8px;
}

.upload-btn:hover {
    background: var(--card-hover);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 0 20px var(--primary-glow);
}

/* Attachments area with modern design */
.attachments {
    display: none;
    margin-top: -24px;
    margin-bottom: 16px;
    padding: 0;
    background: transparent;
    width: 100%;
    animation: fadeIn 0.3s ease;
}

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

/* Compact attachment preview */
.attachment-preview-compact {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: var(--transition);
}

.attachment-preview-compact:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px var(--primary-glow);
}

.attachment-thumbnail {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.attachment-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.attachment-icon-compact {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.attachment-info-compact {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.attachment-info-compact .attachment-name {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.attachment-info-compact .attachment-size {
    font-size: 13px;
    color: var(--text-tertiary);
}

.attachment-remove-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--card-bg);
    color: var(--text-tertiary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.attachment-remove-btn:hover {
    background: var(--error-color);
    color: white;
    transform: scale(1.1);
}

/* Drop hint with glassmorphism */
.drop-hint {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(102, 126, 234, 0.05);
    backdrop-filter: blur(10px);
    border: 3px dashed var(--primary-color);
    color: var(--primary-color);
    font-size: 20px;
    font-weight: 700;
    z-index: 10;
    pointer-events: none;
    border-radius: var(--radius-xl);
    animation: fadeIn 0.3s ease;
}

/* Modern footer */
footer {
    text-align: center;
    padding: 48px 0;
    color: var(--text-tertiary);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 1px;
    background: var(--border-light);
}

/* Responsive design with smooth transitions */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .translation-container {
        grid-template-columns: 1fr auto 1fr;
        gap: 16px;
    }
    
    header h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .translation-container {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .text-actions {
        margin-bottom: 16px;
    }
    
    .translate-btn-container {
        order: -1;
        margin-bottom: 24px;
        margin-top: -12px;
    }
    
    .swap-btn {
        width: 56px;
        height: 56px;
    }
    
    header {
        padding: 40px 0 32px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    textarea,
    .output-text {
        min-height: 200px;
        height: 200px;
        padding: 24px;
    }
    
    .text-box {
        min-height: 280px;
    }
    
    .language-selector,
    .language-display {
        padding: 16px 20px;
        min-height: 64px;
    }
    
    .lang-btn {
        font-size: 13px;
        padding: 8px 16px;
    }
    
    .output-actions {
        padding: 16px 20px;
    }
}

/* Smooth scrollbar styling */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 6px;
    border: 3px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Selection styles */
::selection {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* Focus styles removed for cleaner look */
*:focus-visible {
    outline: none;
}

/* Ensure smooth transitions don't affect layout - removed global transition to fix input issue */

/* Prevent layout shift from transforms */
.tts-btn,
.lang-btn,
.copy-btn,
.swap-btn,
.upload-btn,
.clear-btn-inside {
    will-change: transform;
    backface-visibility: hidden;
    -webkit-font-smoothing: subpixel-antialiased;
}

/* High performance GPU acceleration */
.input-section,
.output-section,
.swap-btn,
.copy-btn {
    transform: translateZ(0);
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}