/* UnitFlow V2 - Modern Unit Converter - Dark Mode Design */

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

:root {
    /* Dark Theme Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-card: #1e1e1e;
    --bg-hover: #2d2d2d;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #808080;
    --text-accent: #ff6b6b;
    
    /* Accent Colors */
    --accent-primary: #ff6b6b;
    --accent-secondary: #4ecdc4;
    --accent-tertiary: #45b7d1;
    --accent-success: #4caf50;
    --accent-warning: #ff9800;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 50%, #45b7d1 100%);
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    --gradient-teal: linear-gradient(135deg, #4ecdc4 0%, #45b7d1 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(255, 107, 107, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Light Theme Override */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-card: #ffffff;
    --bg-hover: #f1f3f4;
    
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6c757d;
    --text-accent: #ff6b6b;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal);
}

/* No loading animations */

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

.bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at top, rgba(255, 107, 107, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at bottom right, rgba(78, 205, 196, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at bottom left, rgba(69, 183, 209, 0.1) 0%, transparent 50%);
}


.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.1;
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 120px;
    height: 120px;
    top: 60%;
    right: 15%;
    animation-delay: 3s;
}

.shape-3 {
    width: 60px;
    height: 60px;
    top: 80%;
    left: 20%;
    animation-delay: 6s;
}

.shape-4 {
    width: 100px;
    height: 100px;
    top: 30%;
    right: 30%;
    animation-delay: 9s;
}

.shape-5 {
    width: 140px;
    height: 140px;
    top: 70%;
    left: 60%;
    animation-delay: 12s;
}


/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: transform var(--transition-fast);
    text-decoration: none;
    color: inherit;
}

.nav-brand:hover {
    transform: scale(1.05);
}

.logo-container {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo {
    width: 100%;
    height: 100%;
    transition: transform var(--transition-normal);
}

.nav-brand:hover .logo {
    transform: rotate(360deg);
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle {
    position: relative;
    width: 50px;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.theme-toggle:hover {
    background: var(--bg-hover);
    box-shadow: var(--shadow-glow);
}

.toggle-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    transition: transform var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

[data-theme="light"] .toggle-slider {
    transform: translateX(26px);
}

.language-selector select {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.language-selector select:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.language-selector select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    padding: 20px 0 0 0;
    margin-top: 5rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    padding: 0 2rem;
}

.hero-text {
}


.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
    opacity: 1;
}



.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transform: scaleX(1);
    transform-origin: left;
}


.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    opacity: 1;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    opacity: 1;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}


.conversion-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}


.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

/* Category Toggles */
.category-toggles {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 0.6rem;
    margin-bottom: 1.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Quick Convert Section - Fixed width to prevent expansion */
.quick-convert-section {
    max-width: 800px !important;
    width: 100%;
    margin: 0 auto;
}

.quick-convert-section .card-content {
    max-width: 100%;
    overflow: hidden;
}

.quick-convert-section .input-group,
.quick-convert-section .output-group {
    min-width: 0;
    flex: 1;
}

.quick-convert-section select {
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.category-toggle {
    padding: 10px 24px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    position: relative;
    overflow: hidden;
}

.category-toggle::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 0.5s;
}

.category-toggle:hover::before {
    left: 100%;
}

.category-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.25);
}

.category-toggle.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

.category-toggle.active:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
}

.toggle-icon {
    font-size: 1.2rem;
    margin-right: 6px;
}

.toggle-text {
    font-size: 0.8rem;
    font-weight: 600;
}

/* Responsive design for smaller screens */
@media (max-width: 768px) {
    .category-toggles {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(4, 1fr);
        gap: 0.6rem;
    }
}

@media (max-width: 480px) {
    .category-toggles {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(5, 1fr);
        gap: 0.4rem;
    }
    
    .category-toggle {
        padding: 8px 16px;
    }
    
    .toggle-text {
        font-size: 0.7rem;
    }
    
    .toggle-icon {
        font-size: 1rem;
        margin-right: 4px;
    }
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

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


.card-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group, .output-group {
    display: flex;
    gap: 0.5rem;
}

.input-group input, .output-group input {
    flex: 3;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.input-group input:focus, .output-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.input-group select, .output-group select {
    flex: 2;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 150px;
}

.input-group select:hover, .output-group select:hover {
    border-color: var(--accent-primary);
}

.conversion-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0.5rem 0;
}

.arrow-line {
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    position: relative;
}


/* Main Content */
.main-content {
    padding: 4rem 0;
    position: relative;
}

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

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Converter Section */
.converter-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 3rem;
    margin-bottom: 4rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}


.converter-interface {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.category-selector {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.category-selector label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.category-selector select {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-selector select:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
}

.category-selector select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.conversion-inputs {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: end;
}

.input-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-card label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.input-wrapper {
    display: flex;
    gap: 0.5rem;
}

.input-wrapper input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 1rem;
    color: var(--text-primary);
    font-size: 1.125rem;
    transition: all var(--transition-fast);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.input-wrapper select {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 150px;
}

.input-wrapper select:hover {
    border-color: var(--accent-primary);
}

.swap-button {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.swap-button:hover {
    transform: scale(1.1) rotate(180deg);
    box-shadow: var(--shadow-lg);
}

.swap-icon {
    width: 24px;
    height: 24px;
    color: white;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-shine {
    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;
}

.btn-primary:hover .btn-shine {
    left: 100%;
}

/* Results Section */
.results-section {
    margin-top: 2rem;
    margin-bottom: 4rem;
}

.results-card {
    background: #151515;
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}


.results-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

.results-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-teal);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    text-align: center;
    margin-bottom: 1rem;
}

.results-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.decimal-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.decimal-controls label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.decimal-select {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    min-width: 60px;
}

.decimal-select:hover {
    border-color: var(--accent-primary);
    background-color: rgba(255, 107, 107, 0.05);
}

.decimal-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.results-content {
    background: transparent;
    border-radius: var(--radius-lg);
    padding: 0;
    margin-top: 0;
    border: none;
}

.no-results {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-results p {
    font-size: 1rem;
    opacity: 0.8;
}

.results-card .disclaimer {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* N/A values styling */
.na-value {
    color: var(--text-muted);
    font-style: italic;
    opacity: 0.6;
}

.na-unit {
    color: var(--text-muted);
    opacity: 0.6;
}


.results-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}


.copy-all-btn {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.copy-all-btn::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 0.5s ease;
}

.copy-all-btn:hover {
    border-color: var(--accent-primary);
    background: rgba(255, 107, 107, 0.1);
    box-shadow: 0 6px 16px rgba(255, 107, 107, 0.2);
    transform: translateY(-2px);
}

.copy-all-btn:hover::before {
    left: 100%;
}

.copy-all-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .results-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.result-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.result-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 107, 107, 0.3);
    background: var(--bg-hover);
}

.result-item.highlighted {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 107, 107, 0.05) 100%);
}

.result-item.original-unit {
    border: 2px solid #2563eb;
    background: rgba(37, 99, 235, 0.05);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.2);
}

.result-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    width: 100%;
    display: block;
}

.result-unit {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, #4ecdc4 0%, #45b7d1 100%);
    border: none;
    border-radius: 8px;
    width: 32px;
    height: 32px;
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(78, 205, 196, 0.3);
}

.copy-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(78, 205, 196, 0.4);
    background: linear-gradient(135deg, #45b7d1 0%, #4ecdc4 100%);
}

/* Categories Section */

.categories-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.category-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    text-align: center;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.category-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.card-stats {
    display: flex;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.card-hover-effect {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.category-card:hover .card-hover-effect {
    opacity: 0.05;
}

/* Available Categories Section */
.categories-section {
    margin-bottom: 4rem;
}

.categories-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    max-width: 1400px;
    margin: 0 auto;
}

.categories-header {
    text-align: center;
    margin-bottom: 3rem;
}

.categories-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.categories-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}


.category-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(102, 126, 234, 0.3);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    display: block;
    filter: grayscale(0.2);
}

.category-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.category-units {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: auto;
    opacity: 0.8;
    flex-grow: 1;
}

.category-stats {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.4rem 0.8rem;
    border-radius: 12px;
    display: inline-block;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

/* Why Use This Site Section */
.why-use-section {
    margin-bottom: 4rem;
}

.why-use-card {
    background: #151515;
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    max-width: 1400px;
    margin: 0 auto;
}

.why-use-header {
    text-align: center;
    margin-bottom: 3rem;
}

.why-use-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.why-use-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.why-use-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.why-use-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.why-use-grid .why-use-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 107, 107, 0.3);
    background: var(--bg-hover);
}

.why-use-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
    filter: grayscale(0.2);
}

.why-use-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.why-use-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
    opacity: 0.9;
}

/* Features Section */
.features-section {
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-brand .logo {
    width: 32px;
    height: 32px;
}

.footer-brand .brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    flex-direction: row;
    gap: 2rem;
    align-items: center;
}

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

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


.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.disclaimer {
    font-size: 0.875rem;
    margin-top: 0.5rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(4, 1fr);
        gap: 1.25rem;
    }
    
    .why-use-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .conversion-inputs {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .swap-button {
        align-self: center;
        transform: rotate(90deg);
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(5, 1fr);
        gap: 1rem;
    }
    
    .why-use-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .why-use-title {
        font-size: 2rem;
    }
    
    .results-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .converter-section {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        margin-top: 4rem;
    }
    
    .hero-content {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Loading Animations */

.loading {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
    background-size: 200px 100%;
}

/* Scroll Animations */
/* Removed fade-in animations */

/* Result item animations */
.result-item {
    opacity: 1;
    transform: translateY(0);
}

.result-item.visible {
    opacity: 1;
    transform: translateY(0);
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Selection */
::selection {
    background: var(--accent-primary);
    color: white;
}

::-moz-selection {
    background: var(--accent-primary);
    color: white;
}

/* Social Sharing */
.social-sharing {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.share-label {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.share-btn.facebook {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--text-secondary);
}

.share-btn.facebook:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.share-btn.linkedin {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--text-secondary);
}

.share-btn.linkedin:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.share-btn.twitter {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--text-secondary);
}

.share-btn.twitter:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}


.share-btn svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.share-btn:hover svg {
    transform: scale(1.1);
}

/* Responsive social sharing */
@media (max-width: 768px) {
    .social-sharing {
        margin-left: 0;
        margin-top: 16px;
        justify-content: center;
    }
    
    .share-btn {
        width: 32px;
        height: 32px;
    }
    
    .share-btn svg {
        width: 18px;
        height: 18px;
    }
}