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

:root {
    --primary-color: #00d4ff;
    --secondary-color: #0fb9d8;
    --dark-bg: #0f1419;
    --darker-bg: #0a0d11;
    --text-primary: #ffffff;
    --text-secondary: #b0b8c1;
    --nav-bg: rgba(15, 20, 25, 0.95);
    --footer-bg: #0a0d11;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0a0d11 0%, #0f1419 50%, #0a0d11 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header and Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
    gap: 20px;
}

.logo a {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    transition: var(--transition);
}

.logo a:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

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

.search-box-header {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 25px;
    padding: 8px 15px;
    transition: var(--transition);
    border: 1px solid transparent;
}

.search-box-header:focus-within {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-color);
}

.search-input-header {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 14px;
    width: 150px;
    transition: var(--transition);
}

.search-input-header::placeholder {
    color: var(--text-secondary);
}

.search-btn-header {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.search-btn-header:hover {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.8;
    }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

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

.logo-large {
    font-size: clamp(48px, 10vw, 96px);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 40px;
    letter-spacing: 2px;
    text-shadow: 0 0 80px rgba(0, 212, 255, 0.3);
}

.search-container {
    display: flex;
    max-width: 600px;
    margin: 0 auto 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.search-container:focus-within {
    box-shadow: 0 10px 50px rgba(0, 212, 255, 0.3);
    border-color: var(--primary-color);
}

.search-input {
    flex: 1;
    padding: 18px 25px;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 16px;
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-btn {
    padding: 18px 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: #0a0d11;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    transform: translateX(-2px);
    box-shadow: -5px 0 20px rgba(0, 212, 255, 0.5);
}

.hero-tagline {
    font-size: clamp(16px, 3vw, 20px);
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-weight: 400;
}

.cta-btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--primary-color);
    color: #0a0d11;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    box-shadow: 0 5px 25px rgba(0, 212, 255, 0.3);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 35px rgba(0, 212, 255, 0.5);
}

/* Content Section */
.content-section {
    padding: 80px 0;
    background: var(--darker-bg);
}

.main-title {
    font-size: clamp(28px, 5vw, 42px);
    margin-bottom: 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-article {
    margin-bottom: 60px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.content-article:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(0, 212, 255, 0.2);
}

.content-article h2 {
    font-size: clamp(24px, 4vw, 32px);
    margin-bottom: 20px;
    color: var(--primary-color);
}

.content-article h3 {
    font-size: clamp(18px, 3vw, 22px);
    margin: 25px 0 15px;
    color: var(--text-primary);
}

.content-article p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
    font-size: clamp(14px, 2vw, 16px);
}

.content-categories {
    margin-top: 30px;
}

.category-group ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-top: 15px;
}

.category-group li {
    padding: 10px 15px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
    text-align: center;
}

.category-group li:hover {
    background: rgba(0, 212, 255, 0.2);
    transform: translateY(-2px);
}

.alternatives {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 25px;
}

.alternative-group {
    padding: 25px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.alternative-group:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--footer-bg);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-column h4 {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

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

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

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.disclaimer {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 15px;
    line-height: 1.6;
}

.disclaimer strong {
    color: var(--text-primary);
}

.copyright {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 10px;
}

.keywords {
    color: rgba(255, 255, 255, 0.3);
    font-size: 12px;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 65px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 65px);
        background: var(--darker-bg);
        flex-direction: column;
        padding: 40px 20px;
        gap: 20px;
        transition: var(--transition);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-menu.active {
        left: 0;
    }

    .mobile-menu-btn {
        display: flex;
        z-index: 1001;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .search-box-header {
        order: 4;
        width: 100%;
        margin-top: 15px;
    }

    .search-input-header {
        width: 100%;
    }

    .nav-wrapper {
        flex-wrap: wrap;
    }

    .search-container {
        flex-direction: column;
        border-radius: 15px;
    }

    .search-input,
    .search-btn {
        width: 100%;
        border-radius: 0;
    }

    .search-btn {
        border-radius: 0 0 15px 15px;
    }

    .search-input {
        border-radius: 15px 15px 0 0;
    }

    .content-article {
        padding: 25px;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .category-group ul {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .logo a {
        font-size: 20px;
    }

    .hero {
        padding-top: 100px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
    }

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

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

/* Loading optimization */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Smooth scrolling for better UX */
@supports (scroll-behavior: smooth) {
    html {
        scroll-behavior: smooth;
    }
}