/* --- Variables & Reset --- */
:root {
    --primary: #FFD200;
    --primary-dark: #eebf00;
    --dark: #121212;
    --dark-light: #1e1e1e;
    --gray: #f8f9fa;
    --text: #333;
    --text-light: #666;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: var(--text); background: #fff; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }

/* --- Layout --- */
.container { max-width: 1100px; margin: auto; padding: 0 20px; }
.section { padding: 80px 0; }
.text-center { text-align: center; }

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; margin-bottom: 15px; color: var(--dark); }
h2 { font-size: 2.2rem; margin-bottom: 40px; text-align: center; }
p { margin-bottom: 15px; color: var(--text-light); }

/* --- Header --- */
.navbar { background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); padding: 15px 0; border-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 1000; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 24px; font-weight: 900; color: var(--dark); display: flex; align-items: center; gap: 8px; }
.logo span { color: #dcb300; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a:hover { color: var(--primary-dark); }
.nav-cta { background: var(--dark); color: #fff; padding: 10px 20px; border-radius: 50px; font-weight: 600; font-size: 0.9rem; }
.nav-cta:hover { background: #333; transform: translateY(-2px); }

/* --- Hero Section --- */
.hero {
    background: radial-gradient(circle at top right, #2a2a2a, #121212);
    color: #fff;
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCIgdmlld0JveD0iMCAwIDQwIDQwIiBmaWxsPSJub25lIiBzdHJva2U9InJnYmEoMjU1LDI1NSwyNTUsMC4wMykiIHN0cm9rZS13aWR0aD0iMSI+PHBhdGggZD0iTTAgNDBMNDAgMEgwVjQwWiIvPjwvc3ZnPg==');
    opacity: 0.3; animation: bgMove 60s linear infinite;
}
@keyframes bgMove { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.hero-content { position: relative; z-index: 2; max-width: 700px; margin: 0 auto; text-align: center; }
.hero h1 { font-size: 3rem; color: #fff; margin-bottom: 20px; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: 1.3rem; color: #ccc; margin-bottom: 40px; }

/* --- Buttons --- */
.btn-main {
    background: var(--primary); color: var(--dark);
    padding: 18px 40px; border-radius: 50px;
    font-weight: 800; font-size: 1.1rem; border: none;
    cursor: pointer; display: inline-flex; align-items: center; gap: 10px;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(255, 210, 0, 0.3);
}
.btn-main:hover { transform: translateY(-4px); box-shadow: 0 15px 30px rgba(255, 210, 0, 0.5); background: #ffe033; }
.btn-main:active { transform: scale(0.98); }

/* --- Benefits Grid --- */
.benefits-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-top: -50px; position: relative; z-index: 5; }
.benefit-card {
    background: #fff; padding: 30px; border-radius: var(--radius);
    box-shadow: var(--shadow); text-align: center;
    transition: 0.3s; border-bottom: 4px solid transparent;
}
.benefit-card:hover { transform: translateY(-10px); border-bottom-color: var(--primary); }
.b-icon { font-size: 40px; margin-bottom: 20px; display: block; }

/* --- Promo Section --- */
.promo-box { background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%); }
.promo-card {
    background: #fff; padding: 50px; border-radius: var(--radius);
    max-width: 800px; margin: 0 auto; text-align: center;
    box-shadow: var(--shadow); border: 1px solid rgba(0,0,0,0.05);
}
.code-display {
    background: #fff8e1; border: 2px dashed var(--primary);
    padding: 20px; font-size: 2.5rem; font-weight: 800;
    color: #d32f2f; margin: 25px 0; border-radius: 8px;
    font-family: monospace; position: relative;
    cursor: pointer; transition: 0.2s;
}
.code-display:active { background: #ffe0b2; }
.code-label { text-transform: uppercase; font-size: 0.85rem; font-weight: 700; color: #888; letter-spacing: 1px; }

/* --- Steps --- */
.step-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.step-item {
    background: #fff; padding: 40px 30px; border-radius: var(--radius);
    border: 1px solid #eee; position: relative; overflow: hidden;
    transition: 0.4s ease; opacity: 0; transform: translateY(30px);
}
.step-item.visible { opacity: 1; transform: translateY(0); }
.step-item:hover { box-shadow: var(--shadow); border-color: transparent; }
.step-num {
    background: var(--primary); color: var(--dark);
    width: 50px; height: 50px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 1.2rem; margin-bottom: 20px;
}

/* --- Requirements --- */
.req-section { background: var(--dark); color: #fff; }
.req-section h2 { color: #fff; }
.req-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; text-align: center; }
.req-item img { width: 60px; height: 60px; margin-bottom: 15px; filter: invert(1); }
.req-item h4 { color: var(--primary); }
.req-item p { color: #aaa; }

/* --- FAQ --- */
.faq-container { max-width: 800px; margin: auto; }
.faq-item { margin-bottom: 15px; border: 1px solid #eee; border-radius: 8px; overflow: hidden; }
.faq-question {
    background: #fff; padding: 20px; cursor: pointer;
    font-weight: 600; display: flex; justify-content: space-between; align-items: center;
    transition: 0.3s;
}
.faq-question:hover { background: #fcfcfc; color: var(--primary-dark); }
.faq-question::after { content: '+'; font-size: 1.5rem; color: var(--primary); font-weight: 300; }
.faq-item.active .faq-question::after { content: '−'; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; background: #fff; }
.faq-answer p { padding: 0 20px 20px; font-size: 0.95rem; color: #555; border-top: 1px solid transparent; }

/* --- Footer --- */
.footer { background: #1a1a1a; color: #777; padding: 50px 0; font-size: 0.85rem; border-top: 5px solid var(--primary); }
.footer a { color: #aaa; text-decoration: underline; }
.footer a:hover { color: var(--primary); }

/* --- Mobile Sticky Button --- */
.mobile-sticky-btn {
    position: fixed; bottom: 20px; left: 20px; right: 20px;
    background: var(--primary); color: #000;
    padding: 15px; text-align: center; border-radius: 50px;
    font-weight: bold; box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    z-index: 9999; display: none; text-transform: uppercase; letter-spacing: 1px;
}

/* --- Media Queries --- */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .nav-links { display: none; } /* Можно добавить бургер-меню, но для лендинга можно скрыть */
    .promo-card { padding: 25px; }
    .code-display { font-size: 1.8rem; }
    .mobile-sticky-btn { display: block; }
    .benefits-grid { margin-top: 40px; }
    .footer { padding-bottom: 90px; } /* Место под кнопку */
}