/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-gradient: linear-gradient(135deg, #1e1e2e 0%, #2d2d44 100%);
    
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #4facfe;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #a0aec0;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --bg-dark: #1a1a2e;
    
    --border-color: #e2e8f0;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.3);
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-secondary);
    overflow-x: hidden;
}

/* ===================================
   NAVIGATION
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    animation: slideDown 0.5s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    transition: var(--transition-normal);
}

.nav-brand:hover {
    transform: translateY(-2px);
}

.brand-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
    transition: var(--transition-normal);
}

.nav-brand:hover .brand-icon {
    transform: rotate(180deg);
    color: var(--secondary-color);
}

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

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

.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-normal);
    padding: 0.5rem 0;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    position: relative;
    margin-top: 70px;
    padding: 6rem 2rem;
    background: var(--dark-gradient);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(79, 172, 254, 0.15) 0%, transparent 50%);
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 0.8s ease;
}

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

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    animation: float 3s ease-in-out infinite;
}

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

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1rem;
    line-height: 1.2;
    letter-spacing: -1px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 400;
}

.hero-divider {
    width: 100px;
    height: 4px;
    background: var(--accent-gradient);
    margin: 2rem auto 0;
    border-radius: 2px;
    animation: expandWidth 1s ease 0.5s both;
}

@keyframes expandWidth {
    from {
        width: 0;
    }
    to {
        width: 100px;
    }
}

/* ===================================
   MAIN CONTENT
   =================================== */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.content-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    position: relative;
}

/* ===================================
   TABLE OF CONTENTS
   =================================== */
.toc-sidebar {
    position: relative;
}

.toc-sticky {
    position: sticky;
    top: 100px;
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.toc-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.toc-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toc-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-normal);
    display: block;
}

.toc-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary-gradient);
    border-radius: 2px;
    transition: var(--transition-normal);
}

.toc-link:hover,
.toc-link.active {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
    padding-left: 1.5rem;
}

.toc-link:hover::before,
.toc-link.active::before {
    height: 100%;
}

/* ===================================
   POLICY CONTENT
   =================================== */
.policy-content {
    animation: fadeInUp 0.8s ease 0.2s both;
}

.content-section {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: 3rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

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

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.section-icon {
    width: 48px;
    height: 48px;
    padding: 12px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    animation: pulse 2s ease-in-out infinite;
}

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

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

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.content-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 2rem 0 1rem;
}

.content-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1.5rem 0 0.75rem;
}

.content-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-section a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    border-bottom: 1px solid transparent;
}

.content-section a:hover {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

/* ===================================
   DEFINITION GRID
   =================================== */
.definition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.definition-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.definition-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

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

.definition-card:hover::before {
    height: 100%;
}

.definition-card h4 {
    color: var(--primary-color);
    margin: 0 0 0.75rem 0;
    font-size: 1.125rem;
}

.definition-card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ===================================
   INFO BOXES
   =================================== */
.info-box {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.05) 0%, rgba(0, 242, 254, 0.05) 100%);
    border-left: 4px solid var(--accent-color);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.info-box:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.info-box.warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(251, 191, 36, 0.05) 100%);
    border-left-color: var(--warning-color);
}

.info-box h4 {
    color: var(--accent-color);
    margin-top: 0;
}

.info-box.warning h4 {
    color: var(--warning-color);
}

.info-box ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.info-box li {
    color: var(--text-secondary);
    margin: 0.5rem 0;
}

/* ===================================
   FEATURE LIST
   =================================== */
.feature-list {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
}

.feature-list li {
    position: relative;
    padding: 1rem 1rem 1rem 3rem;
    margin: 1rem 0;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.875rem;
}

.feature-list li:hover {
    background: white;
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.feature-list li strong {
    color: var(--text-primary);
}

/* ===================================
   SERVICE CARD
   =================================== */
.service-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    margin: 2rem 0;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card h4 {
    color: var(--primary-color);
    margin-top: 0;
    font-size: 1.25rem;
}

/* ===================================
   CONTACT CARD
   =================================== */
.contact-card {
    display: flex;
    align-items: center;
    gap: 2rem;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-glow);
    transition: var(--transition-normal);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 40px rgba(102, 126, 234, 0.4);
}

.contact-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.contact-info h4 {
    color: white;
    margin: 0 0 0.5rem 0;
    font-size: 1.125rem;
}

.contact-info a {
    color: white;
    font-size: 1.125rem;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: var(--transition-fast);
}

.contact-info a:hover {
    border-bottom-color: white;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background: var(--dark-gradient);
    color: rgba(255, 255, 255, 0.8);
    padding: 3rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: white;
}

.footer-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-color);
}

.footer-text {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition-normal);
}

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

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

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1024px) {
    .content-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .toc-sidebar {
        display: none;
    }
    
    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .nav-link {
        font-size: 0.875rem;
    }
    
    .hero {
        padding: 4rem 1rem;
        min-height: 300px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .main-content {
        padding: 2rem 1rem;
    }
    
    .content-section {
        padding: 2rem 1.5rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .definition-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .content-section {
        padding: 1.5rem 1rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .contact-card {
        flex-direction: column;
        text-align: center;
    }
}

/* ===================================
   SCROLL ANIMATIONS
   =================================== */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Smooth scroll offset for fixed navbar */
html {
    scroll-padding-top: 100px;
}

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

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

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

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

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-gradient);
}