:root {
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 50% 50%, #1e293b 0%, #0f172a 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    opacity: 0.9;
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-main);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-gradient {
    background: var(--primary-gradient);
    color: white;
    width: 100%;
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* Header */
header {
    padding: 1.5rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
}

.logo img {
    height: 40px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* Hero */
.hero {
    padding: 180px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

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

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.feat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}

.feat-item i {
    color: var(--accent);
}

.cta-group {
    display: flex;
    gap: 1rem;
}

.login-preview {
    max-width: 400px;
    margin: 0 auto;
}

.login-preview h3 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.login-preview p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1.25rem;
}

.input-group input {
    width: 100%;
    padding: 14px;
    border-radius: 10px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    color: white;
}

.card-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.card-footer a {
    color: var(--accent);
    text-decoration: none;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

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

.icon-box {
    width: 70px;
    height: 70px;
    background: var(--primary-gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
}

.feature-item h3 {
    margin-bottom: 1rem;
}

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

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.pricing-card {
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.pricing-card.popular {
    border: 2px solid #a855f7;
    transform: scale(1.05);
}

.pricing-card.premium {
    border: 2px solid #ec4899;
}

.badge {
    position: absolute;
    top: 15px;
    right: -35px;
    background: var(--primary-gradient);
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: 700;
}

.price {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 1.5rem 0;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.plan-features li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
}

.plan-features li i {
    color: #22c55e;
}

/* Reviews */
.reviews-slider {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.review-item .stars {
    color: #fbbf24;
    margin-bottom: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 1.5rem;
}

.user-info img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

/* FAQ */
.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    cursor: pointer;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.faq-answer {
    margin-top: 1rem;
    color: var(--text-muted);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-item.active i {
    transform: rotate(180deg);
}

/* Articles */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.article-link {
    background: rgba(255, 255, 255, 0.03);
    padding: 1.5rem;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-main);
    border-left: 4px solid #6366f1;
    transition: all 0.3s;
}

.article-link:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
}

/* Footer */
.main-footer {
    padding: 60px 0 30px;
    background: rgba(15, 23, 42, 0.95);
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-logo span {
    font-size: 1.5rem;
    font-weight: 800;
}

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

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-text h1 {
        font-size: 3rem;
    }
    .cta-group, .hero-features {
        justify-content: center;
        align-items: center;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .reviews-slider {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .section-title {
        font-size: 2rem;
    }
}