/* Base styles */
:root {
    --primary-color: #0071e3;
    --primary-hover: #0077ED;
    --text-main: #1d1d1f;
    --text-muted: #86868b;
    --bg-main: #ffffff;
    --bg-light: #f5f5f7;
    --border-color: #d2d2d7;
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.bg-light {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 40px;
    letter-spacing: -0.01em;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 14px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 19px;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* Layout */
.grid {
    display: grid;
    gap: 30px;
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    padding: 12px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--text-main);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s;
}

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

/* Hero */
.hero {
    padding: 100px 0 120px;
    overflow: hidden;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    line-height: 1.1;
}

.brand-highlight {
    background: linear-gradient(135deg, var(--primary-color), #00c6ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 22px;
    color: var(--text-muted);
    margin: 0 0 40px;
}

/* Dynamic Visual */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.dynamic-visual {
    position: relative;
    width: 300px;
    height: 300px;
}

.pulse-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 150px;
    height: 150px;
    background: rgba(0, 113, 227, 0.1);
    border-radius: 50%;
    animation: pulse 3s infinite cubic-bezier(0.25, 0.8, 0.25, 1);
}

.pulse-circle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    border: 2px solid rgba(0, 113, 227, 0.05);
    border-radius: 50%;
}

.pulse-circle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #0071e3, #00c6ff);
    border-radius: 50%;
    box-shadow: 0 10px 30px rgba(0, 113, 227, 0.4);
}

.float-card {
    position: absolute;
    background: #fff;
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    animation: float 6s infinite ease-in-out;
    z-index: 10;
}

.card-1 {
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    right: -20%;
    animation-delay: 2s;
}

.card-3 {
    top: 60%;
    left: -20%;
    animation-delay: 4s;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 113, 227, 0.4);
    }
    70% {
        box-shadow: 0 0 0 60px rgba(0, 113, 227, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 113, 227, 0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

/* Sections */
section {
    padding: 80px 0;
}

/* Cards */
.card {
    background: #fff;
    border-radius: 18px;
    padding: 40px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.card p {
    color: var(--text-muted);
}

/* Pricing */
.pricing-card {
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: none;
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: 0 8px 30px rgba(0, 113, 227, 0.15);
}

.pricing-card .price {
    font-size: 40px;
    font-weight: 600;
    margin: 20px 0;
}

.pricing-card .price span {
    font-size: 16px;
    color: var(--text-muted);
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.pricing-card ul li {
    margin-bottom: 12px;
    padding-left: 24px;
    position: relative;
    color: var(--text-muted);
}

.pricing-card ul li::before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Reviews */
.review-card {
    background: var(--bg-light);
    border-radius: 18px;
    padding: 30px;
}

.review-text {
    font-style: italic;
    margin-bottom: 20px;
}

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

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.faq-q {
    font-size: 20px;
    margin-bottom: 10px;
}

.faq-a {
    color: var(--text-muted);
}

/* Footer */
.footer {
    background-color: var(--bg-light);
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: var(--text-muted);
    margin: 0 15px;
    font-size: 14px;
}

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

.copyright {
    color: var(--text-muted);
    font-size: 12px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 18px;
        margin: 0 auto 40px;
    }
    
    .nav-menu {
        display: none;
    }
    
    section {
        padding: 50px 0;
    }
    
    .card {
        padding: 30px 20px;
    }
    
    .footer-links a {
        display: block;
        margin: 10px 0;
    }
}

/* Articles */
.articles {
    padding: 80px 0;
}

.article-card {
    padding: 0;
    overflow: hidden;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    transition: transform 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
}

.article-img {
    height: 180px;
    width: 100%;
}

.article-card h3 {
    font-size: 18px;
    margin: 20px;
    line-height: 1.4;
}

.article-card h3 a {
    color: var(--text-main);
}

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

.article-card p {
    margin: 0 20px 20px;
    font-size: 14px;
    color: var(--text-muted);
}