/* ===================================================
   Converter Tool - Premium CSS Stylesheet
   Universal Converter Tool with Modern Design
   =================================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-glow: rgba(99, 102, 241, 0.3);

    /* Secondary Colors */
    --secondary: #10b981;
    --secondary-dark: #059669;
    --secondary-light: #34d399;

    /* Accent Colors */
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --accent-light: #fbbf24;

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-hero: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #3730a3 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f3f4f6 100%);
    --gradient-glow: radial-gradient(circle at center, var(--primary-glow) 0%, transparent 70%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

input,
select {
    font-family: inherit;
    font-size: inherit;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===================================================
   Header & Navigation
   =================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.logo i {
    color: var(--primary);
    font-size: 1.75rem;
}

.logo .highlight {
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--gray-600);
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a i {
    font-size: 0.875rem;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--gray-700);
    padding: 0.5rem;
}

/* ===================================================
   Hero Section
   =================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 70px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(168, 85, 247, 0.2) 0%, transparent 60%);
    animation: heroFloat 15s ease-in-out infinite;
}

@keyframes heroFloat {

    0%,
    100% {
        transform: scale(1) translate(0, 0);
    }

    50% {
        transform: scale(1.05) translate(-2%, 2%);
    }
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.hero-badge i {
    color: var(--accent);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #fb923c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle strong {
    color: var(--white);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat i {
    color: var(--accent);
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--white);
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
    transition: var(--transition);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), 0 0 50px rgba(99, 102, 241, 0.5);
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    overflow: hidden;
    line-height: 0;
}

.hero-wave svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
    fill: var(--gray-50);
}

/* ===================================================
   Section Styles
   =================================================== */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* ===================================================
   Main Converter Section
   =================================================== */
.converter-section {
    background: var(--white);
    padding: 5rem 0;
}

.converter-main {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.converter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1.5rem;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.tab-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.tab-btn i {
    font-size: 1rem;
}

.converter-body {
    padding: 2rem;
}

.converter-card {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1.5rem;
    align-items: end;
    margin-bottom: 2rem;
}

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

.converter-input-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
}

.converter-input-group label i {
    color: var(--primary);
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.input-wrapper input,
.input-wrapper select {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    color: var(--gray-900);
    transition: var(--transition);
}

.input-wrapper input:focus,
.input-wrapper select:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.input-wrapper input::placeholder {
    color: var(--gray-400);
}

.input-wrapper select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 3rem;
}

.swap-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    color: var(--white);
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    margin-bottom: 0.375rem;
}

.swap-btn:hover {
    transform: rotate(180deg) scale(1.1);
}

.conversion-result {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.result-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.result-display span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.result-display .from-display {
    color: var(--primary);
}

.result-display .to-display {
    color: var(--secondary);
}

.result-display i {
    color: var(--gray-400);
}

.result-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
}

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

/* Quick Reference Table */
.quick-reference {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.quick-reference h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.quick-reference h3 i {
    color: var(--primary);
}

.quick-reference table {
    width: 100%;
    border-collapse: collapse;
}

.quick-reference th,
.quick-reference td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.quick-reference th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-500);
    background: var(--white);
}

.quick-reference td {
    font-size: 0.875rem;
    color: var(--gray-700);
}

.quick-reference tr:last-child td {
    border-bottom: none;
}

.quick-reference tr:hover td {
    background: var(--white);
}

/* ===================================================
   Categories Section
   =================================================== */
.categories-section {
    background: var(--gray-50);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.category-card {
    display: flex;
    flex-direction: column;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.category-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
}

.category-icon.gradient-bg {
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 1.5rem;
}

.category-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.category-card p {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.unit-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.unit-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--gray-600);
}

.unit-list li i {
    color: var(--secondary);
    font-size: 0.75rem;
}

.category-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    margin-top: auto;
}

.category-card:hover .category-link {
    gap: 0.75rem;
}

/* ===================================================
   Features Section
   =================================================== */
.features-section {
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.feature-card a {
    color: var(--primary);
    font-weight: 500;
}

.feature-card a:hover {
    text-decoration: underline;
}

/* ===================================================
   How To Section
   =================================================== */
.how-to-section {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
}

.how-to-section .section-header h2,
.how-to-section .section-header p {
    color: var(--white);
}

.how-to-section .section-header p {
    opacity: 0.8;
}

.how-to-section .section-badge {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

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

.step-card {
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: blur(10px);
    text-align: center;
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.step-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    margin: 1rem auto 1.25rem;
    font-size: 1.75rem;
    color: var(--accent);
}

.step-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 0.75rem;
}

.step-card p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* ===================================================
   Articles Section
   =================================================== */
.articles-section {
    background: var(--gray-50);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.article-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

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

.article-image {
    position: relative;
    height: 200px;
    background: var(--gradient-primary);
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.375rem 0.875rem;
    background: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
}

.article-content {
    padding: 1.5rem;
}

.article-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.article-content h3 a {
    color: var(--gray-900);
}

.article-content h3 a:hover {
    color: var(--primary);
}

.article-content>p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.article-content p a {
    color: var(--primary);
    font-weight: 500;
}

.article-content p a:hover {
    text-decoration: underline;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.articles-cta {
    text-align: center;
}

.secondary-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-700);
    transition: var(--transition);
}

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

/* ===================================================
   FAQ Section
   =================================================== */
.faq-section {
    background: var(--white);
}

.faq-grid {
    display: grid;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--white);
}

.faq-question span {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.faq-question span i {
    color: var(--primary);
}

.faq-question>i {
    color: var(--gray-400);
    transition: var(--transition);
}

.faq-item.active .faq-question>i {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 1.5rem 1.25rem;
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.faq-answer a {
    color: var(--primary);
    font-weight: 500;
}

.faq-answer a:hover {
    text-decoration: underline;
}

/* ===================================================
   CTA Section
   =================================================== */
.cta-section {
    background: var(--gradient-primary);
    padding: 4rem 0;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-content .gradient-text {
    color: var(--accent);
    -webkit-text-fill-color: var(--accent);
}

.cta-content p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1.5rem;
}

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

.cta-section .cta-btn:hover {
    background: var(--gray-100);
}

/* ===================================================
   Footer
   =================================================== */
.footer {
    background: var(--gray-900);
    padding: 4rem 0 2rem;
    color: var(--gray-400);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--primary-light);
}

.footer-logo .highlight {
    color: var(--primary-light);
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    color: var(--gray-400);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 1.25rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    color: var(--gray-400);
    transition: var(--transition);
}

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

.footer-links a i {
    font-size: 0.75rem;
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
}

.footer-bottom p:first-child {
    margin-bottom: 0.25rem;
}

/* ===================================================
   Utility Classes
   =================================================== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* ===================================================
   Responsive Styles
   =================================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-brand {
        grid-column: span 2;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--white);
        padding: 1rem;
        border-top: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 0.75rem 1rem;
    }

    .mobile-menu-btn {
        display: block;
    }

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

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 1.25rem;
    }

    .converter-card {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .swap-btn {
        transform: rotate(90deg);
        margin: 0 auto;
    }

    .swap-btn:hover {
        transform: rotate(270deg) scale(1.1);
    }

    .converter-tabs {
        justify-content: center;
    }

    .tab-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.8125rem;
    }

    .tab-btn span {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-brand {
        grid-column: span 1;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .result-display span {
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    section {
        padding: 3rem 0;
    }

    .container {
        padding: 0 1rem;
    }

    .hero-content {
        padding: 2rem 0;
    }

    .hero-stats {
        flex-wrap: wrap;
        justify-content: center;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================================
   Animations
   =================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* Loading State */
.loading {
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: var(--gray-900);
    color: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    z-index: 9999;
    animation: fadeInUp 0.3s ease;
}

.toast.success {
    background: var(--secondary);
}

.toast.error {
    background: #ef4444;
}