:root {
    --primary: #31a0d2;
    --black: #111111;
    --deep: #1C1C1C;
    --mid: #2B2B2B;
    --light: #F5F5F5;
    --white: #ffffff;
    --radius: 18px;
    --shadow: 0 14px 34px rgba(17,17,17,.09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--light);
    color: var(--deep);
    line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
header, section, footer { width: 100%; }
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.site-header {
    background: var(--primary);
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 8px 22px rgba(0,0,0,.12);
}
.header-inner {
    min-height: 72px;
    display: grid;
    grid-template-columns: 44px 1fr;
    align-items: center;
    gap: 12px;
    padding: 10px 0 6px;
}
.logo {
    justify-self: center;
    display: inline-flex;
    align-items: center;
}
.logo img {
    width: 132px;
    max-height: 48px;
    object-fit: contain;
}
.mobile-menu-toggle {
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 14px;
    background: rgba(255,255,255,.18);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
}
.main-nav, .header-actions { display: none; }
.mobile-nav {
    display: none;
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto 10px;
    padding: 10px;
    background: rgba(255,255,255,.13);
    border-radius: 16px;
    gap: 8px;
}
.mobile-nav.is-open {
    display: grid;
}
.mobile-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(255,255,255,.14);
    color: #fff;
    font-weight: 700;
}
.mobile-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 0 16px 12px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 13px 22px;
    background: linear-gradient(135deg, var(--primary), #69c7f0);
    color: #fff;
    font-weight: 800;
    border: 0;
    box-shadow: 0 10px 24px rgba(49,160,210,.28);
    min-height: 44px;
}
.btn-small { padding: 10px 17px; font-size: 14px; }
.btn-dark {
    background: linear-gradient(135deg, #111111, #2B2B2B);
    box-shadow: 0 10px 24px rgba(0,0,0,.18);
}
.hero, .banner {
    background: radial-gradient(circle at top right, rgba(49,160,210,.18), transparent 34%), #fff;
    padding: 42px 0;
}
.hero-grid {
    display: grid;
    gap: 28px;
    align-items: center;
}
.hero h1, .banner h1 {
    margin: 0 0 14px;
    font-size: clamp(32px, 7vw, 58px);
    line-height: 1.08;
    color: var(--black);
}
.hero p, .banner p { color: #454545; font-size: 17px; }
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 22px 0;
}
.tag {
    background: rgba(49,160,210,.11);
    color: var(--black);
    border: 1px solid rgba(49,160,210,.22);
    padding: 9px 12px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 14px;
}
.app-frame {
    background: linear-gradient(145deg, #fff, #fafafa);
    border-radius: 28px;
    box-shadow: var(--shadow);
    padding: 20px;
    border: 1px solid rgba(0,0,0,.06);
}
section { padding: 42px 0; }
.section-title {
    margin: 0 0 18px;
    font-size: clamp(26px, 5vw, 38px);
    color: var(--black);
}
.lead { font-size: 18px; color: #444; }
.grid {
    display: grid;
    gap: 18px;
}
.card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,0,0,.05);
}
.card h2, .card h3 { color: var(--black); margin-top: 0; }
.notice {
    background: #f4fbff;
    border: 1px solid rgba(49,160,210,.22);
    border-left: 6px solid var(--primary);
    border-radius: 18px;
    padding: 18px;
    margin: 22px 0;
    color: #2f3f48;
}
.faq {
    display: grid;
    gap: 14px;
}
.faq details {
    background: #fff;
    border-radius: 16px;
    padding: 18px 20px;
    box-shadow: var(--shadow);
}
.faq summary {
    cursor: pointer;
    font-weight: 800;
    color: var(--black);
}
.inline-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}
.inline-links a {
    color: var(--primary);
    font-weight: 800;
}
.steps {
    counter-reset: step;
    display: grid;
    gap: 14px;
}
.step {
    position: relative;
    padding-left: 58px;
}
.step:before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
}
.footer {
    background: var(--deep);
    color: #fff;
    padding: 38px 0;
}
.footer-grid {
    display: grid;
    gap: 22px;
}
.footer-logo {
    color: #fff;
    font-size: 26px;
    font-weight: 900;
}
.footer-nav {
    display: grid;
    gap: 8px;
}
.footer-nav a { color: #f2f2f2; }
.footer-note {
    background: rgba(255,255,255,.08);
    border-radius: 18px;
    padding: 18px;
}
@media (min-width: 768px) {
    .header-inner {
        grid-template-columns: auto 1fr auto;
        min-height: 82px;
        padding: 0;
    }
    .mobile-menu-toggle, .mobile-nav, .mobile-actions { display: none !important; }
    .logo { justify-self: start; }
    .logo img { width: 150px; }
    .main-nav {
        display: flex;
        justify-content: center;
        gap: 10px;
    }
    .main-nav a {
        padding: 10px 13px;
        border-radius: 999px;
        color: #fff;
        font-weight: 800;
    }
    .main-nav a:hover { background: rgba(255,255,255,.14); }
    .header-actions {
        display: flex;
        justify-content: flex-end;
        gap: 10px;
    }
    .hero-grid { grid-template-columns: 1.08fr .92fr; }
    .grid.two { grid-template-columns: repeat(2, 1fr); }
    .grid.three { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1.3fr .7fr 1fr; }
}
@media (min-width: 1024px) {
    .container { width: min(1180px, calc(100% - 64px)); }
    .logo img { width: 168px; }
    .main-nav { gap: 18px; }
    section { padding: 56px 0; }
    .hero { padding: 70px 0; }
}