/* AI Budget — лендинг. Без внешних зависимостей: только системные шрифты,
   поэтому страница открывается мгновенно и не ждёт шрифтовых CDN. */

:root {
    --ink:        #0f172a;
    --ink-soft:   #475569;
    --ink-faint:  #94a3b8;
    --line:       #e2e8f0;
    --bg:         #ffffff;
    --bg-alt:     #f8fafc;
    --card:       #ffffff;
    --brand:      #4f46e5;
    --brand-dark: #4338ca;
    --brand-soft: #eef2ff;
    --green:      #059669;
    --green-soft: #ecfdf5;
    --warn:       #b45309;
    --radius:     14px;
    --radius-sm:  10px;
    --shadow:     0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .06);
    --shadow-lg:  0 2px 4px rgba(15, 23, 42, .04), 0 20px 48px rgba(15, 23, 42, .10);
    --wrap:       1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -.02em; }
p { margin: 0; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.wrap.narrow { max-width: 760px; }

.muted { color: var(--ink-soft); }
.small { font-size: 13px; }

/* ── Кнопки ── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, border-color .15s, transform .05s;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }

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

.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink-faint); background: var(--bg-alt); }

.btn-lg { padding: 15px 26px; font-size: 16px; }
.btn-sm { padding: 9px 15px; font-size: 14px; }
.btn-block { display: flex; width: 100%; }

/* ── Шапка ── */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 64px;
}

.logo { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); }
.logo:hover { text-decoration: none; }

.logo-mark {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: 9px;
    background: var(--brand);
    color: #fff;
    font-size: 17px;
    font-weight: 700;
}
.logo-text { font-weight: 700; font-size: 17px; letter-spacing: -.01em; }

.country-switch {
    display: flex;
    gap: 4px;
    padding: 3px;
    background: var(--bg-alt);
    border: 1px solid var(--line);
    border-radius: 999px;
}

.cs-btn {
    padding: 7px 14px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--ink-soft);
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.cs-btn:hover { color: var(--ink); }
.cs-btn.active { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(15, 23, 42, .08); }

/* ── Герой ── */

.hero { padding: 72px 0 56px; background: linear-gradient(180deg, #fff 0%, var(--bg-alt) 100%); }

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 56px;
    align-items: center;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 18px;
    padding: 5px 12px;
    background: var(--brand-soft);
    color: var(--brand-dark);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
}

.hero h1 { font-size: clamp(32px, 4.4vw, 52px); margin-bottom: 18px; }

.lead { font-size: 18px; color: var(--ink-soft); max-width: 34em; margin-bottom: 28px; }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 30px; }

.hero-facts { display: flex; flex-wrap: wrap; gap: 10px 26px; font-size: 14px; color: var(--ink-soft); }
.hero-facts li { position: relative; padding-left: 18px; }
.hero-facts li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: 700;
}
.hero-facts strong { color: var(--ink); }

/* ── Мокап телефона ── */

.hero-visual { display: flex; justify-content: center; }

.phone {
    width: 100%;
    max-width: 340px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.phone-top {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 14px;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--line);
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.phone-title { margin-left: auto; font-size: 12px; font-weight: 600; color: var(--ink-soft); }

.phone-body { padding: 14px; display: grid; gap: 10px; }

.msg { padding: 11px 13px; border-radius: 12px; font-size: 13px; }
.msg-in { background: var(--bg-alt); border: 1px solid var(--line); justify-self: start; }
.msg-out { background: var(--brand-soft); justify-self: stretch; }
.msg-file { font-weight: 600; }
.msg-sub { color: var(--ink-soft); font-size: 12px; margin-top: 2px; }
.msg-title { font-weight: 600; margin-bottom: 9px; }

.bar-row { display: flex; justify-content: space-between; font-size: 12px; color: var(--ink-soft); }
.bar-row b { color: var(--ink); font-variant-numeric: tabular-nums; }
.bar { height: 6px; background: #fff; border-radius: 4px; margin: 4px 0 9px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--brand); border-radius: 4px; }

.msg-total {
    margin-top: 6px;
    padding-top: 9px;
    border-top: 1px dashed rgba(79, 70, 229, .25);
    font-size: 12px;
    font-weight: 600;
}
.msg-total .warn { color: var(--warn); font-weight: 600; }

/* ── Банки ── */

.banks { padding: 32px 0; border-bottom: 1px solid var(--line); }
.banks-label {
    text-align: center;
    font-size: 13px;
    color: var(--ink-faint);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 16px;
}
.banks-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 22px;
}
.banks-list span { font-size: 15px; font-weight: 600; color: var(--ink-soft); }

/* ── Секции ── */

.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.section-sub { color: var(--ink-soft); margin-bottom: 34px; max-width: 44em; }

/* ── Проблемы ── */

.problem-grid { display: grid; gap: 20px; margin-top: 28px; }
.problem {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 20px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.problem-icon { font-size: 24px; line-height: 1.2; }
.problem p { color: var(--ink-soft); }

/* ── Шаги ── */

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 12px; }

.steps li {
    position: relative;
    padding: 26px 22px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.step-num {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 14px;
}
.steps h3 { font-size: 18px; margin-bottom: 8px; }
.steps p { color: var(--ink-soft); font-size: 15px; }

.aside {
    margin-top: 26px;
    padding: 16px 20px;
    background: var(--green-soft);
    border: 1px solid rgba(5, 150, 105, .18);
    border-radius: var(--radius-sm);
    color: #065f46;
    font-size: 15px;
}

/* ── Возможности ── */

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

.feature {
    padding: 24px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: box-shadow .18s, transform .18s;
}
.feature:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.feature-icon { font-size: 26px; margin-bottom: 12px; }
.feature h3 { font-size: 17px; margin-bottom: 8px; }
.feature p { color: var(--ink-soft); font-size: 15px; }

/* ── Тарифы ── */

.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }

.plan {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 28px 24px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.plan-featured { border-color: var(--brand); box-shadow: var(--shadow-lg); }
.plan-badge {
    position: absolute;
    top: -12px;
    left: 24px;
    padding: 4px 12px;
    background: var(--brand);
    color: #fff;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}
.plan h3 { font-size: 17px; color: var(--ink-soft); font-weight: 600; }
.plan-price { font-size: 38px; font-weight: 700; letter-spacing: -.03em; }
.plan-price span { font-size: 20px; color: var(--ink-soft); font-weight: 600; }
.plan-note { font-size: 13px; color: var(--ink-faint); margin-top: -8px; }
.plan ul { display: grid; gap: 9px; margin: 4px 0 8px; }
.plan li { position: relative; padding-left: 22px; font-size: 15px; color: var(--ink-soft); }
.plan li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: 700;
}
.plan li strong { color: var(--ink); }
.plan .btn { margin-top: auto; }

/* ── FAQ ── */

.faq {
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 15px 18px;
    margin-bottom: 10px;
    background: var(--card);
}
.faq summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--brand); font-weight: 700; }
.faq[open] summary::after { content: '−'; }
.faq p { margin-top: 12px; color: var(--ink-soft); font-size: 15px; }

/* ── Финальный призыв ── */

.cta {
    padding: 76px 0;
    background: var(--brand);
    color: #fff;
    text-align: center;
}
.cta-inner h2 { font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 14px; }
.cta-inner p { color: rgba(255, 255, 255, .88); margin-bottom: 26px; }
.cta .btn-primary { background: #fff; color: var(--brand-dark); }
.cta .btn-primary:hover { background: #f1f5f9; }
.cta-note { margin-top: 14px; font-size: 14px; color: rgba(255, 255, 255, .7); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

/* ── Партнёрам ── */

.partners p { margin-bottom: 14px; color: var(--ink-soft); }

/* ── Подвал ── */

.site-footer { padding: 52px 0 28px; background: var(--bg-alt); border-top: 1px solid var(--line); }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer-inner .logo { margin-bottom: 10px; }
.footer-nav, .footer-bots { display: grid; gap: 8px; align-content: start; font-size: 15px; }
.footer-nav a, .footer-bots a { color: var(--ink-soft); }
.footer-nav a:hover, .footer-bots a:hover { color: var(--brand); }
.footer-bottom { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); }

/* ── Адаптив ── */

@media (max-width: 960px) {
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { order: -1; }
    .features, .steps, .plans { grid-template-columns: 1fr 1fr; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    .header-inner { flex-wrap: wrap; min-height: auto; padding-top: 10px; padding-bottom: 10px; }
    .country-switch { order: 3; width: 100%; justify-content: space-between; }
    .cs-btn { flex: 1; }
    .hero { padding: 44px 0 36px; }
    .section { padding: 52px 0; }
    .features, .steps, .plans { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
    .plan-featured { order: -1; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .feature:hover { transform: none; }
}