:root {
    --bg: #F8FAFC;
    --surface: #FFFFFF;
    --text: #1E293B;
    --muted: #4B5563;
    --accent: #4F46E5;
    --accent-hover: #4338CA;
    --border: #E2E8F0;
    --shadow-card: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
    --shadow-hover: 0 20px 30px -10px rgba(0,0,0,0.08), 0 10px 15px -5px rgba(0,0,0,0.03);
    --guarantee-color: #059669;
    --save-badge-bg: #059669;
    --save-color: #10B981;
    --stars-color: #F59E0B;
}
[data-theme="dark"] {
    --bg: #0F172A;
    --surface: #1E293B;
    --text: #F1F5F9;
    --muted: #94A3B8;
    --accent: #818CF8;
    --accent-hover: #6366F1;
    --border: #334155;
    --shadow-card: 0 10px 25px -5px rgba(0,0,0,0.3), 0 8px 10px -6px rgba(0,0,0,0.2);
    --shadow-hover: 0 20px 30px -10px rgba(0,0,0,0.4), 0 10px 15px -5px rgba(0,0,0,0.2);
    --guarantee-color: #2D8B6E;
    --save-badge-bg: #2D8B6E;
    --save-color: #4ADE80;
    --stars-color: #FBBF24;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.skip-link {
    position: absolute; top: -40px; left: 0;
    background: var(--accent); color: white; padding: 8px 16px;
    z-index: 200; text-decoration: none; font-weight: 600; border-radius: 0 0 8px 0;
}
.skip-link:focus { top: 0; }
nav {
    display: flex; justify-content: space-between; align-items: center;
    height: 76px; padding: 0 2rem; background: var(--surface);
    backdrop-filter: blur(12px); border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
}
.logo { display: flex; align-items: center; height: 50px; text-decoration: none; }
.logo svg { height: 100%; width: auto; }
.nav-links { display: flex; list-style: none; gap: 2rem; align-items: center; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: 0.95rem; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.btn-nav { background: var(--accent); color: #fff !important; padding: 0.55rem 1.4rem; border-radius: 40px; font-weight: 600; font-size: 0.9rem; transition: transform 0.2s, box-shadow 0.2s; }
.btn-nav:hover { transform: translateY(-2px); box-shadow: 0 8px 15px -5px rgba(79,70,229,0.3); }
.hamburger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; padding: 10px; margin: -10px; }
.hamburger span { display: block; width: 24px; height: 3px; background: var(--text); border-radius: 3px; transition: 0.2s; }
.theme-toggle, .lang-toggle {
    background: none; border: 1px solid var(--border); border-radius: 50px;
    padding: 0.4rem 0.9rem; cursor: pointer; font-size: 1.1rem;
    color: var(--text); margin-left: 0.8rem; transition: background 0.2s;
    font-weight: 500;
}
.theme-toggle:hover, .lang-toggle:hover { background: var(--bg); }
.hero { display: flex; align-items: center; gap: 4rem; padding: 5rem 0 4rem; }
.hero-content { flex: 1; }
.tag-group { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 1.5rem; }
.tag, .social-proof { padding: 0.3rem 1rem; border-radius: 40px; font-weight: 600; font-size: 0.85rem; }
.tag { background: rgba(79,70,229,0.08); color: var(--accent); }
.social-proof { background: rgba(16,185,129,0.1); color: #059669; }
.hero-slogan {
    font-size: 1.8rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--accent), #A78BFA, var(--accent));
    background-size: 200% 100%;
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
    animation: floatSlogan 4s ease-in-out infinite, gradientShift 4s ease infinite;
}
@keyframes floatSlogan { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-3px)} }
@keyframes gradientShift { 0%{background-position:0% 50%} 100%{background-position:200% 50%} }
.hero-content h1 { font-size: clamp(2.8rem, 5vw, 3.8rem); font-weight: 800; line-height: 1.15; margin-bottom: 1.5rem; letter-spacing: -0.02em; }
.hero-content h1 span { color: var(--accent); }
.hero-content p { color: var(--muted); font-size: 1.15rem; max-width: 480px; margin-bottom: 2.5rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn {
    background: var(--accent); color: #fff; padding: 0.85rem 2rem; border-radius: 40px;
    text-decoration: none; font-weight: 600; font-size: 1rem; transition: all 0.25s;
    display: inline-block; border: none; cursor: pointer;
}
.btn:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 10px 20px -5px rgba(79,70,229,0.3); }
.btn-outline { background: transparent; color: var(--text); border: 2px solid #CBD5E1; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.hero-visual { flex: 1; display: flex; justify-content: center; }
.hero-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
    padding: 2.5rem 2rem; text-align: center; width: 100%; max-width: 400px;
    box-shadow: var(--shadow-card); position: relative; transition: transform 0.3s, box-shadow 0.3s;
    animation: cardEntrance 0.8s cubic-bezier(0.15,0.85,0.3,1.05) forwards;
}
.hero-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
@keyframes cardEntrance { from { opacity: 0; transform: translateY(25px) scale(0.97); } to { opacity: 1; transform: translateY(0) scale(1); } }
.hero-card .save-badge { background: var(--save-badge-bg); color: #fff; font-size: 0.75rem; font-weight: 700; padding: 0.25rem 1rem; border-radius: 20px; position: absolute; top: -12px; right: 20px; }
.hero-card .yt-icon { font-size: 3.5rem; margin-bottom: 0.5rem; }
.hero-card .plan-title { font-weight: 700; font-size: 1.3rem; margin-bottom: 0.2rem; }
.hero-card .old-price { text-decoration: line-through; color: #94A3B8; font-size: 0.95rem; }
.hero-card .price { font-size: 3.2rem; font-weight: 800; margin: 0.3rem 0; }
.hero-card .price small { font-size: 1rem; color: var(--muted); font-weight: 400; }
.hero-card .period { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
.hero-card ul { list-style: none; text-align: left; margin: 1.5rem 0 1rem; font-size: 0.95rem; color: var(--muted); }
.hero-card ul li { padding: 0.35rem 0; display: flex; align-items: center; gap: 0.5rem; }
.hero-card ul li::before { content: "✓"; color: #10B981; font-weight: bold; }
.guarantee { font-size: 0.85rem; color: var(--guarantee-color); margin-top: 0.5rem; display: flex; align-items: center; gap: 0.3rem; justify-content: center; }
.hero-card .btn { display: block; width: 100%; margin-top: 1rem; }
.steps-section { padding: 5rem 0 3rem; }
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2rem; }
.step-item { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 2rem; text-align: center; transition: all 0.25s; box-shadow: var(--shadow-card); }
.step-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.step-number { width: 48px; height: 48px; background: var(--accent); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.3rem; margin: 0 auto 1rem; }
.step-item h3 { font-size: 1.15rem; margin-bottom: 0.3rem; }
.step-item p { color: var(--muted); font-size: 0.95rem; }
.section, .steps-section, .cta-box { opacity: 0; transform: translateY(30px); transition: opacity 0.6s, transform 0.6s; }
.section.visible, .steps-section.visible, .cta-box.visible { opacity: 1; transform: translateY(0); }
.section { padding: 5rem 0; }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 { font-size: 2.4rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.8rem; }
.section-header p { color: var(--muted); font-size: 1.05rem; max-width: 500px; margin: 0 auto; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }
.feature-item { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 2rem 1.5rem; text-align: center; transition: all 0.25s; box-shadow: var(--shadow-card); }
.feature-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.feature-icon { font-size: 2.2rem; margin-bottom: 0.8rem; }
.feature-item h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.3rem; }
.feature-item p { color: var(--muted); font-size: 0.9rem; }
.pricing-wrapper { display: flex; justify-content: center; }
.pricing-card { background: var(--surface); border: 1px solid #F59E0B; border-radius: 20px; padding: 2.5rem 2rem; text-align: center; max-width: 480px; width: 100%; box-shadow: var(--shadow-card); transition: all 0.3s; position: relative; }
.pricing-card:hover { transform: translateY(-6px); box-shadow: 0 25px 50px -10px rgba(245,158,11,0.2); }
.pricing-badge { background: #F59E0B; color: #1E293B; font-size: 0.8rem; font-weight: 700; padding: 0.25rem 1.2rem; border-radius: 40px; position: absolute; top: -14px; left: 50%; transform: translateX(-50%); text-transform: uppercase; }
.pricing-card h3 { font-size: 1.6rem; margin-bottom: 1.2rem; }
.pricing-card .price { font-size: 3.5rem; font-weight: 800; }
.pricing-card .price small { font-size: 1.1rem; color: var(--muted); }
.original-price { text-decoration: line-through; color: #94A3B8; font-size: 0.9rem; margin: 0.3rem 0; }
.pricing-card .save { color: var(--save-color); font-weight: 600; margin: 0.5rem 0 1.5rem; }
.pricing-card ul { list-style: none; text-align: left; margin: 1.5rem 0 2rem; color: var(--muted); font-size: 0.95rem; }
.pricing-card ul li { padding: 0.35rem 0; display: flex; align-items: center; gap: 0.5rem; }
.pricing-card ul li::before { content: "✓"; color: #10B981; font-weight: bold; }
.pricing-card .btn { display: block; }
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.review-card { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 2rem; text-align: left; box-shadow: var(--shadow-card); transition: all 0.25s; }
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.stars { color: var(--stars-color); font-size: 1.2rem; margin-bottom: 0.5rem; letter-spacing: 2px; }
.review-card p { font-style: italic; color: var(--muted); margin-bottom: 1rem; }
.review-card strong { color: var(--text); }
.faq-list { max-width: 650px; margin: 0 auto; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; margin-bottom: 0.6rem; overflow: hidden; }
.faq-q { width: 100%; background: none; border: none; padding: 1.2rem 1.5rem; font-weight: 600; font-size: 1rem; color: var(--text); display: flex; justify-content: space-between; align-items: center; cursor: pointer; text-align: left; }
.faq-q span:last-child { font-size: 0.8rem; transition: transform 0.2s; color: var(--muted); }
.faq-item.open .faq-q span:last-child { transform: rotate(180deg); }
.faq-a { padding: 0 1.5rem 1.2rem; color: var(--muted); font-size: 0.95rem; display: none; }
.faq-item.open .faq-a { display: block; }
.trust-badges { display: flex; justify-content: center; gap: 2rem; flex-wrap: wrap; margin-top: 2rem; font-size: 0.85rem; color: var(--muted); }
.trust-badges span { display: inline-flex; align-items: center; gap: 0.4rem; background: var(--surface); padding: 0.3rem 1rem; border-radius: 40px; border: 1px solid var(--border); }
.cta-box { background: var(--accent); border-radius: 24px; padding: 4rem 2rem; text-align: center; color: #fff; margin: 3rem auto; }
.cta-box h2 { font-size: 2.2rem; margin-bottom: 1rem; }
.cta-box p { color: rgba(255,255,255,0.8); margin-bottom: 2rem; font-size: 1.1rem; }
.cta-box .buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn-white { background: #fff; color: var(--accent); animation: softAttention 2.5s ease-in-out infinite; }
.btn-white:hover { background: #F1F5F9; transform: translateY(-2px); }
@keyframes softAttention { 0%,100%{box-shadow:0 0 0 0 rgba(255,255,255,0.4)} 50%{box-shadow:0 0 0 8px rgba(255,255,255,0)} }
.btn-outline-white { background: transparent; border: 2px solid rgba(255,255,255,0.6); color: #fff; border-radius: 40px; }
.btn-outline-white:hover { background: rgba(255,255,255,0.1); border-color: #fff; transform: translateY(-2px); }
.payment-note { color: rgba(255,255,255,0.6); font-size: 0.85rem; margin-top: 1.5rem; }
footer { text-align: center; padding: 2.5rem 2rem; color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--border); }
footer a { color: var(--muted); text-decoration: none; margin: 0 0.3rem; }
footer a:hover { color: var(--text); }
.footer-links { margin-top: 0.8rem; display: flex; gap: 1.5rem; justify-content: center; flex-wrap: wrap; }
.footer-note { font-size: 0.75rem; margin-top: 0.6rem; color: #94A3B8; }
.sticky-bar { display: none; position: fixed; bottom: 0; left: 0; right: 0; background: var(--surface); border-top: 1px solid var(--border); padding: 0.7rem; z-index: 99; text-align: center; }
.sticky-bar .btn { width: 100%; }
@media (max-width: 768px) {
    .hero { flex-direction: column; padding: 3rem 0 2rem; gap: 2.5rem; }
    .hero-content { text-align: center; }
    .hero-content p { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; background: var(--surface); flex-direction: column; padding: 1.5rem; gap: 1rem; border-bottom: 1px solid var(--border); }
    .nav-links.open { display: flex; }
    .hamburger { display: flex; }
    .sticky-bar { display: block; }
    .section { padding: 3.5rem 0; }
}