/* ===========================================
   ADVANCED CONVERTER WEBSITE - STYLES
   Professional, Modern, Feature-Rich Design
============================================ */

/* CSS Variables for Theme Switching */
:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    --secondary-color: #7c3aed;
    --accent-color: #00d4aa;
    --danger-color: #ff4757;
    --warning-color: #ffa502;
    --success-color: #2ed573;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, var(--accent-color), #00b894);
}

.dark-theme {
    --primary-color: #60a5fa;
    --primary-dark: #3b82f6;
    --primary-light: #93c5fd;
    --secondary-color: #a78bfa;
    --accent-color: #2dd4bf;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    
    --border-color: #334155;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader {
    text-align: center;
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

.loader-text {
    color: white;
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 1px;
}

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

/* Header Styles */
.header {
    background: var(--bg-card);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo-text span {
    color: var(--secondary-color);
}

.tagline {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: -5px;
    font-weight: 500;
}

.ai-status {
    background: var(--bg-secondary);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.ai-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.ai-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

.quick-convert {
    display: flex;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.quick-convert input {
    padding: 10px 15px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    min-width: 200px;
}

.quick-convert input::placeholder {
    color: var(--text-light);
}

.quick-convert button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    transition: var(--transition);
}

.quick-convert button:hover {
    background: var(--primary-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--bg-hover);
    color: var(--primary-color);
}

.theme-toggle button {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle button:hover {
    background: var(--bg-hover);
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* AI Assistant */
.ai-assistant {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 350px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    z-index: 999;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
}

.ai-assistant.active {
    transform: translateY(0);
    opacity: 1;
}

.ai-header {
    display: flex;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    background: var(--gradient-primary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    color: white;
}

.ai-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
}

.ai-info h4 {
    font-size: 1rem;
    margin-bottom: 2px;
}

.ai-info p {
    font-size: 0.8rem;
    opacity: 0.9;
}

.ai-close {
    margin-left: auto;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    opacity: 0.8;
}

.ai-close:hover {
    opacity: 1;
}

.ai-chat {
    height: 300px;
    overflow-y: auto;
    padding: 15px;
}

.ai-message {
    display: flex;
    margin-bottom: 15px;
}

.ai-avatar.small {
    width: 30px;
    height: 30px;
    min-width: 30px;
    font-size: 0.8rem;
}

.message-content {
    background: var(--bg-secondary);
    padding: 12px 15px;
    border-radius: 0 var(--radius-md) var(--radius-md) var(--radius-md);
    margin-left: 10px;
    max-width: 85%;
}

.message-content p {
    font-size: 0.9rem;
    line-height: 1.5;
}

.ai-input {
    display: flex;
    padding: 15px;
    border-top: 1px solid var(--border-color);
}

.ai-input input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.ai-input button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    margin-left: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.bg-shape {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(124, 58, 237, 0.1));
}

.shape-1 {
    width: 400px;
    height: 400px;
    top: -200px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    bottom: -150px;
    left: -100px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 10%;
}

.shape-4 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    right: 20%;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto 60px;
    text-align: center;
}

.hero-badge {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
}

.hero-badge span {
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

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

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary, .btn-ai {
    padding: 15px 30px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 102, 255, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-ai {
    background: var(--accent-color);
    color: white;
}

.btn-ai:hover {
    background: #00b894;
    transform: translateY(-3px);
}

.hero-visual {
    max-width: 500px;
    margin: 0 auto;
}

.visual-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.card-header h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

.live-badge {
    background: var(--danger-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.live-dot {
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

.card-body {
    padding: 20px;
}

.conversion-visual {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.from-currency, .to-currency {
    display: flex;
    align-items: center;
    gap: 10px;
}

.currency-flag {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-size: cover;
    border: 2px solid var(--border-color);
}

.currency-flag.usd {
    background: linear-gradient(135deg, #1a237e, #303f9f);
}

.currency-flag.eur {
    background: linear-gradient(135deg, #003399, #ffcc00);
}

.currency-info {
    display: flex;
    flex-direction: column;
}

.currency-code {
    font-weight: 700;
    font-size: 1.2rem;
}

.currency-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.currency-amount {
    font-size: 1.5rem;
    font-weight: 700;
    margin-left: 20px;
}

.conversion-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.conversion-arrow i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.conversion-rate {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.conversion-chart {
    height: 80px;
    margin-bottom: 15px;
}

.trend-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--success-color);
    font-size: 0.9rem;
}

.trend-up {
    color: var(--success-color);
}

/* Dashboard Section */
.dashboard {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.section-title i {
    color: var(--primary-color);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px;
}

.dashboard-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-top: 30px;
    border: 1px solid var(--border-color);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-converter {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    min-width: 300px;
}

.search-converter i {
    color: var(--text-light);
    margin-right: 10px;
}

.search-converter input {
    border: none;
    background: transparent;
    color: var(--text-primary);
    width: 100%;
    font-size: 1rem;
}

.search-converter input:focus {
    outline: none;
}

.control-btn {
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

/* Converter Grid */
.converter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.converter-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    overflow: hidden;
}

.converter-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.converter-card.featured {
    grid-column: 1 / -1;
    border: 2px solid var(--primary-color);
}

.converter-card.mini {
    height: 250px;
}

.card-header {
    display: flex;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.card-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 102, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
}

.card-icon i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.card-header h3 {
    flex: 1;
    font-size: 1.3rem;
    font-weight: 700;
}

.card-badge {
    background: var(--gradient-primary);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

.card-body {
    padding: 20px;
}

/* Currency Converter Specific Styles */
.converter-inputs {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
}

.input-with-dropdown {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.input-with-dropdown input {
    flex: 1;
    padding: 15px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
}

.input-with-dropdown input:focus {
    outline: none;
}

.currency-selector {
    position: relative;
    min-width: 120px;
    border-left: 1px solid var(--border-color);
}

.selected-currency {
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    background: var(--bg-secondary);
    transition: var(--transition);
}

.selected-currency:hover {
    background: var(--bg-hover);
}

.currency-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 300px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 100;
    max-height: 300px;
    overflow-y: auto;
}

.currency-selector:hover .currency-dropdown {
    display: block;
}

.dropdown-search {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-search input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.currency-list {
    padding: 10px 0;
}

.currency-item {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    cursor: pointer;
    transition: var(--transition);
}

.currency-item:hover {
    background: var(--bg-hover);
}

.swap-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.swap-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.swap-btn:hover {
    background: var(--primary-dark);
    transform: rotate(180deg);
}

.rate-display {
    background: var(--bg-secondary);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.converter-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.convert-btn {
    flex: 1;
    padding: 15px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

.action-btn {
    padding: 15px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.currency-chart {
    height: 200px;
    margin-bottom: 20px;
}

.currency-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.info-label {
    font-size: 0.8rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-weight: 600;
}

.status-open {
    color: var(--success-color);
    display: flex;
    align-items: center;
    gap: 5px;
}

.popular-conversions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.mini-convert {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.mini-convert:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Unit Converter Styles */
.converter-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.unit-converter {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.unit-inputs {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 15px;
}

.unit-inputs .input-group {
    display: flex;
    flex-direction: column;
}

.unit-inputs input,
.unit-inputs select {
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
}

.unit-inputs input:focus,
.unit-inputs select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.unit-visual {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 20px;
}

.visual-scale {
    display: flex;
    align-items: center;
    gap: 15px;
}

.scale-from,
.scale-to {
    min-width: 60px;
    text-align: center;
    font-weight: 600;
}

.scale-bar {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    position: relative;
}

.scale-fill {
    position: absolute;
    height: 100%;
    width: 50%;
    background: var(--gradient-primary);
    border-radius: 4px;
}

.common-units {
    margin-top: 20px;
}

.common-units h4 {
    margin-bottom: 10px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.common-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.common-list button {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.common-list button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Time Zone Converter Styles */
.time-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.time-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.time-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.time-selector {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.time-selector select {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
}

.current-time {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    text-align: center;
}

.time-visual {
    height: 150px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.world-map {
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 400"><path fill="%23e2e8f0" d="M0 0h800v400H0z"/></svg>');
    background-size: cover;
    position: relative;
}

.location {
    position: absolute;
    cursor: pointer;
}

.location-dot {
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 2px solid white;
    box-shadow: 0 0 0 3px var(--primary-color);
}

.location-label {
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.from-location {
    top: 40%;
    left: 25%;
}

.to-location {
    top: 40%;
    left: 65%;
}

.time-line {
    position: absolute;
    top: 50%;
    left: 25%;
    width: 40%;
    height: 2px;
    background: var(--primary-color);
    transform-origin: left center;
}

.time-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.time-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 15px;
    text-align: center;
    flex: 1;
}

.time-city {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.time-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.time-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.time-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 20px;
}

.time-arrow i {
    font-size: 2rem;
    color: var(--primary-color);
}

.time-diff {
    background: var(--bg-secondary);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.meeting-planner {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-top: 20px;
}

.meeting-planner h4 {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.meeting-time {
    display: flex;
    gap: 10px;
}

.meeting-time input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
}

.btn-small {
    padding: 12px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

/* AI Tools Section */
.ai-tools {
    padding: 80px 0;
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.ai-tools .section-title,
.ai-tools .section-subtitle {
    color: white;
}

.ai-tools .section-title i {
    color: white;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.ai-tool-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.ai-tool-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
}

.ai-tool-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: white;
}

.ai-tool-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.ai-tool-card p {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 25px;
}

.ai-tool-btn {
    padding: 12px 25px;
    background: white;
    color: var(--primary-color);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 auto;
}

.ai-tool-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* Ad Containers */
.ad-container {
    margin: 40px auto;
    text-align: center;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.ad-label {
    background: var(--bg-secondary);
    padding: 10px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border-color);
}

.top-banner {
    min-height: 100px;
}

.in-article {
    min-height: 300px;
}

/* Advanced Features */
.advanced-features {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.features-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.feature-tab {
    padding: 15px 25px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-tab.active,
.feature-tab:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.feature-content {
    display: none;
}

.feature-content.active {
    display: block;
}

.feature-demo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.demo-visual {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.demo-info h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.demo-info p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    margin-bottom: 30px;
}

.feature-list li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-list i {
    color: var(--success-color);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3,
.footer-col h4 {
    color: white;
    margin-bottom: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-logo i {
    font-size: 2rem;
    color: var(--primary-light);
}

.footer-description {
    color: #94a3b8;
    margin-bottom: 25px;
    line-height: 1.7;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-col ul li a:hover {
    color: white;
    padding-left: 5px;
}

.adsense-info {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: var(--radius-md);
}

.adsense-info p {
    color: #94a3b8;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.adsense-info ul {
    list-style: none;
    margin-bottom: 20px;
}

.adsense-info ul li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #94a3b8;
}

.adsense-info ul li i {
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-copyright p {
    color: #94a3b8;
    font-size: 0.9rem;
}

.footer-disclaimer {
    margin-top: 10px;
    font-size: 0.8rem;
}

.footer-disclaimer a {
    color: var(--primary-light);
    text-decoration: none;
}

.footer-disclaimer a:hover {
    text-decoration: underline;
}

.footer-credits {
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success-color);
    color: white;
    padding: 15px 25px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    transition: var(--transition);
    opacity: 0;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 30px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal-body {
    padding: 40px;
}

.video-placeholder {
    height: 400px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.video-placeholder i {
    font-size: 5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

/* History Sidebar */
.history-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 350px;
    height: 100%;
    background: var(--bg-card);
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: var(--transition);
    z-index: 1002;
    display: flex;
    flex-direction: column;
}

.history-sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h4 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.sidebar-close:hover {
    color: var(--primary-color);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .converter-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 992px) {
    .dashboard-controls {
        flex-direction: column;
        gap: 20px;
    }
    
    .control-group {
        width: 100%;
        justify-content: center;
    }
    
    .search-converter {
        min-width: 100%;
    }
    
    .feature-demo {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .nav-right {
        gap: 1rem;
    }
    
    .quick-convert {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .stat {
        width: calc(50% - 10px);
    }
    
    .converter-inputs {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    
    .swap-container {
        flex-direction: row;
        justify-content: center;
        gap: 20px;
    }
    
    .time-inputs {
        grid-template-columns: 1fr;
    }
    
    .time-result {
        flex-direction: column;
        gap: 20px;
    }
    
    .time-arrow {
        transform: rotate(90deg);
        padding: 20px 0;
    }
    
    .ai-assistant {
        width: calc(100% - 40px);
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary, .btn-ai {
        width: 100%;
    }
    
    .converter-grid {
        grid-template-columns: 1fr;
    }
    
    .converter-card.featured {
        grid-column: auto;
    }
    
    .ai-grid {
        grid-template-columns: 1fr;
    }
    
    .features-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        justify-content: flex-start;
        padding-bottom: 10px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}