/*
 * Дизайн-система сайта Олега Филиппова: главная + блог.
 *
 * Тёплая «бумага», графит и один кобальтовый акцент. Заголовки — Onest
 * крупно и плотно, подписи — JetBrains Mono (почерк разработчика).
 * Тёмная тема — по системной настройке.
 */
:root {
  --paper: #f2efe8;
  --paper-2: #e9e5db;
  --card: #fbfaf6;
  --ink: #111214;
  --ink-2: #2a2c31;
  --muted: #5d6068;
  --faint: #8b8e96;
  --line: rgba(17, 18, 20, 0.12);
  --line-strong: rgba(17, 18, 20, 0.22);
  --accent: #2d4bff;
  --accent-ink: #ffffff;
  --accent-soft: rgba(45, 75, 255, 0.1);
  --ok: #1f9d55;
  --night: #111214;
  --night-2: #1b1d22;
  --on-night: #f2efe8;
  --on-night-muted: #a7a9b0;
  --radius: 18px;
  --radius-sm: 12px;
  --wrap: 1200px;
  --text: 720px;
  --sans: "Onest", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #131417;
    --paper-2: #1a1b1f;
    --card: #1c1e22;
    --ink: #f0ede6;
    --ink-2: #d9d6cf;
    --muted: #a3a5ad;
    --faint: #7c7f87;
    --line: rgba(240, 237, 230, 0.12);
    --line-strong: rgba(240, 237, 230, 0.24);
    --accent: #6f86ff;
    --accent-ink: #0b0c10;
    --accent-soft: rgba(111, 134, 255, 0.14);
    --night: #0b0c0e;
    --night-2: #17181c;
    color-scheme: dark;
  }
  /* Тёмные блоки на тёмной странице иначе сливаются с фоном. */
  .lead, .cta { box-shadow: inset 0 0 0 1px var(--line-strong); }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.mono { font-family: var(--mono); font-size: 13px; letter-spacing: 0.02em; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; padding: 8px 12px; background: var(--ink); color: var(--paper); border-radius: 8px; }
.skip:focus { left: 8px; }

/* ── Кнопки ── */
.btn {
  white-space: nowrap;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 52px; padding: 0 24px; border: 0; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink);
  font: 600 16px/1 var(--sans); text-decoration: none; cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease, background 0.15s ease;
}
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: translateY(1px); }
.btn--ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line-strong); }
.btn--ghost:hover { box-shadow: inset 0 0 0 1.5px var(--ink); filter: none; }
.btn--sm { min-height: 40px; padding: 0 18px; font-size: 14px; }
.btn--wide { width: 100%; }
.btn[disabled] { opacity: 0.6; cursor: wait; }
.btn .arr { transition: transform 0.15s ease; }
.btn:hover .arr { transform: translateX(3px); }

/* ── Шапка ── */
.topbar { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.topbar.is-scrolled { border-bottom-color: var(--line); }
.topbar__in { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: inline-flex; align-items: baseline; gap: 8px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; white-space: nowrap; }
.brand .mono { color: var(--faint); font-weight: 500; }
.topnav { display: flex; gap: 24px; margin-left: auto; }
.topnav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 500; white-space: nowrap; }
.topnav a:hover, .topnav a[aria-current] { color: var(--ink); }
.menu-btn { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--line-strong); border-radius: 999px; background: transparent; color: var(--ink); cursor: pointer; }
.menu-btn span, .menu-btn span::before, .menu-btn span::after { display: block; width: 18px; height: 1.5px; margin: 0 auto; background: currentColor; position: relative; transition: transform 0.2s; }
.menu-btn span::before, .menu-btn span::after { content: ""; position: absolute; left: 0; }
.menu-btn span::before { top: -6px; } .menu-btn span::after { top: 6px; }
.menu-open .menu-btn span { background: transparent; }
.menu-open .menu-btn span::before { transform: translateY(6px) rotate(45deg); }
.menu-open .menu-btn span::after { transform: translateY(-6px) rotate(-45deg); }

/* ── Общие блоки секций ── */
.section { padding-block: clamp(72px, 8vw, 112px); }
.section--tight { padding-block: clamp(56px, 6vw, 80px); }
/* Соседние секции одного фона делят один отступ, а не складывают два. */
.section:not(.night) + .section:not(.night) { padding-top: 0; }
.hero + .section { padding-top: clamp(48px, 6vw, 88px); }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 18px; color: var(--muted); }
.eyebrow::before { content: ""; width: 22px; height: 1.5px; background: var(--accent); }
.h2 { margin: 0; font-size: clamp(34px, 5vw, 60px); line-height: 1.02; letter-spacing: -0.035em; font-weight: 800; max-width: 16ch; }
.section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 48px; }
.section-head p { margin: 0; max-width: 46ch; color: var(--muted); }

/* ── Форма заявки ── */
.lead { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; margin: 0 auto; padding: 56px; border-radius: 28px; background: var(--night); color: var(--on-night); }
.lead h2 { margin: 0 0 16px; font-size: clamp(32px, 4.4vw, 52px); line-height: 1.03; letter-spacing: -0.035em; font-weight: 800; }
.lead__intro p { color: var(--on-night-muted); margin: 0 0 18px; }
.lead__points { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; color: var(--on-night); }
.lead__points li { display: flex; gap: 12px; }
.lead__points li::before { content: "→"; color: var(--accent); font-family: var(--mono); }
.lead__points a { color: var(--on-night); }
.lead__form { display: grid; gap: 14px; align-content: start; }
.lead__form label { display: grid; gap: 7px; font-size: 14px; color: var(--on-night-muted); }
.lead__form .opt { color: #6f727a; }
.lead__form input:not([type=checkbox]), .lead__form select, .lead__form textarea {
  width: 100%; padding: 14px 16px; border: 1px solid #30333a; border-radius: 12px;
  background: var(--night-2); color: var(--on-night); font: 16px/1.4 var(--sans);
}
.lead__form textarea { resize: vertical; min-height: 92px; }
.lead__form input::placeholder, .lead__form textarea::placeholder { color: #6f727a; }
.lead__form input:focus, .lead__form select:focus, .lead__form textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.lead__form .consent { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; }
.lead__form .consent input { margin-top: 2px; width: 18px; height: 18px; accent-color: var(--accent); flex-shrink: 0; }
.lead__form .consent a { color: var(--on-night); }
.lead__form .btn { min-height: 56px; margin-top: 4px; }
.lead__status { min-height: 1.4em; margin: 0; font-size: 14px; }
.lead__status.ok { color: #6be39b; }
.lead__status.err { color: #ff9b9b; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* ── Подвал ── */
.footer { padding: 48px 0 110px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }
.footer__in { display: flex; flex-wrap: wrap; gap: 16px 40px; justify-content: space-between; }
.footer p { margin: 0; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--ink); }
.sticky-cta { display: none; }

/* ── Карточки статей ── */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { display: flex; flex-direction: column; gap: 10px; padding: 24px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); text-decoration: none; transition: border-color 0.2s, transform 0.2s; }
.card:hover { border-color: var(--ink); transform: translateY(-2px); }
.card__date { font-family: var(--mono); font-size: 12px; color: var(--faint); }
.card__title { font-weight: 700; font-size: 19px; line-height: 1.25; letter-spacing: -0.01em; }
.card__desc { color: var(--muted); font-size: 15px; }

/* ── Появление при прокрутке ── */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(.2,.7,.2,1); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

@media (max-width: 1060px) {
  .topnav { display: none; position: fixed; inset: 68px 0 auto 0; flex-direction: column; gap: 0; padding: 8px 20px 20px; background: var(--paper); border-bottom: 1px solid var(--line); }
  .topnav a { padding: 14px 0; font-size: 18px; border-bottom: 1px solid var(--line); }
  .menu-open .topnav { display: flex; }
  .menu-btn { display: inline-block; margin-left: 0; }
  .topbar .btn--sm { margin-left: auto; }
}
@media (max-width: 980px) {
  .lead { grid-template-columns: 1fr; padding: 36px 24px; gap: 28px; }
  .cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .topbar .btn--sm { display: none; }
  .menu-btn { margin-left: auto; }
  .cards { grid-template-columns: 1fr; }
  .lead { margin: 0 -20px; border-radius: 0; }
  .sticky-cta {
    display: flex; align-items: center; justify-content: center;
    position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 30;
    height: 54px; border-radius: 999px; background: var(--accent); color: var(--accent-ink);
    font-weight: 600; text-decoration: none; box-shadow: 0 10px 30px rgba(17, 18, 20, 0.25);
    transition: transform 0.25s, opacity 0.25s;
  }
  .sticky-cta.is-hidden { transform: translateY(90px); opacity: 0; pointer-events: none; }
}

/* ── Видеозвонок ── */
.live { position: relative; display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--ok); flex-shrink: 0; }
.live::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 2px solid var(--ok); opacity: 0; animation: livePulse 2.4s ease-out infinite; }
@keyframes livePulse { 0% { transform: scale(.6); opacity: .7; } 100% { transform: scale(1.6); opacity: 0; } }
.meet-cta {
  display: inline-flex; align-items: center; gap: 14px; margin-top: 18px; padding: 12px 18px 12px 16px;
  border: 1px solid var(--line-strong); border-radius: 16px; background: var(--card); color: var(--ink);
  font: inherit; text-align: left; cursor: pointer; transition: border-color .2s, transform .2s;
}
.meet-cta:hover { border-color: var(--ok); transform: translateY(-1px); }
.meet-cta b { display: block; font-weight: 600; font-size: 15px; }
.meet-cta small { display: block; color: var(--muted); font-size: 13px; }
.link-btn { padding: 0; border: 0; background: none; color: inherit; font: inherit; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.meet { width: min(460px, calc(100vw - 32px)); padding: 0; border: 0; border-radius: 22px; background: var(--night); color: var(--on-night); box-shadow: 0 40px 80px -20px rgba(0,0,0,.55); }
.meet::backdrop { background: rgba(10, 11, 14, .55); backdrop-filter: blur(4px); }
.meet__box { position: relative; display: grid; gap: 14px; padding: 30px 28px 26px; }
.meet__close { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border: 0; border-radius: 50%; background: var(--night-2); color: var(--on-night); font-size: 22px; line-height: 1; cursor: pointer; }
.meet__label { display: flex; align-items: center; gap: 10px; margin: 0; color: var(--on-night-muted); }
.meet h3 { margin: 0; font-size: 28px; line-height: 1.1; letter-spacing: -0.03em; font-weight: 800; }
.meet__text { margin: 0 0 4px; color: var(--on-night-muted); font-size: 15px; }
.meet label { display: grid; gap: 7px; font-size: 14px; color: var(--on-night-muted); }
.meet .opt { color: #6f727a; }
.meet input:not([type=checkbox]) { width: 100%; padding: 13px 15px; border: 1px solid #30333a; border-radius: 12px; background: var(--night-2); color: var(--on-night); font: 16px/1.4 var(--sans); }
.meet input:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.meet .consent { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; }
.meet .consent input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--accent); }
.meet .consent a { color: var(--on-night); }
.meet__status { min-height: 1.3em; margin: 0; font-size: 14px; color: var(--on-night-muted); }
.meet__status.ok { color: #6be39b; }
.meet__status.err { color: #ff9b9b; }
.meet__status a { color: var(--on-night); font-weight: 600; }
@media (max-width: 760px) { .meet-cta { width: 100%; } }

/* ── Плашка cookie ── */
.cookie { position: fixed; left: 16px; bottom: 16px; z-index: 60; display: flex; align-items: center; gap: 16px; max-width: 560px; padding: 14px 16px 14px 18px; border-radius: 16px; background: var(--night); color: var(--on-night); font-size: 14px; line-height: 1.45; box-shadow: 0 20px 40px -15px rgba(0,0,0,.45); }
.cookie p { margin: 0; color: var(--on-night-muted); }
.cookie a { color: var(--on-night); }
.cookie .btn { min-height: 40px; padding: 0 18px; font-size: 14px; flex-shrink: 0; }
@media (max-width: 760px) { .cookie { left: 12px; right: 12px; bottom: 140px; max-width: none; } }

/* ── Чат на сайте ── */
.chat { position: fixed; right: 20px; bottom: 20px; z-index: 55; }
.chat__launch { position: relative; display: inline-flex; align-items: center; gap: 10px; height: 54px; padding: 0 20px 0 18px; border: 0; border-radius: 999px; background: var(--ink); color: var(--paper); font: 600 15px var(--sans); cursor: pointer; box-shadow: 0 14px 30px -10px rgba(17,18,20,.45); transition: transform .2s; }
.chat__launch:hover { transform: translateY(-2px); }
.chat__badge { position: absolute; top: -4px; right: -4px; min-width: 20px; height: 20px; padding: 0 6px; border-radius: 999px; background: #e5484d; color: #fff; font: 700 12px/20px var(--sans); text-align: center; }
.chat--open .chat__launch { display: none; }
.chat__panel { display: grid; grid-template-rows: auto 1fr auto; width: min(380px, calc(100vw - 24px)); height: min(560px, calc(100vh - 120px)); overflow: hidden; border-radius: 20px; background: var(--card); border: 1px solid var(--line); box-shadow: 0 30px 70px -20px rgba(17,18,20,.45); }
.chat__head { display: flex; align-items: center; gap: 12px; padding: 14px 14px 14px 16px; background: var(--night); color: var(--on-night); }
.chat__head img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.chat__head div { display: grid; flex: 1; min-width: 0; }
.chat__head b { font-size: 15px; }
.chat__head span { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--on-night-muted); }
.chat__head .live { width: 8px; height: 8px; }
.chat__close { width: 34px; height: 34px; border: 0; border-radius: 50%; background: var(--night-2); color: var(--on-night); font-size: 22px; cursor: pointer; }
.chat__log { display: flex; flex-direction: column; gap: 8px; padding: 16px; overflow-y: auto; background: var(--paper); }
.msg { max-width: 82%; }
.msg p { margin: 0; padding: 10px 13px; border-radius: 16px; font-size: 15px; line-height: 1.45; white-space: pre-wrap; word-wrap: break-word; }
.msg--in p { background: var(--card); border: 1px solid var(--line); border-bottom-left-radius: 6px; }
.msg--out { align-self: flex-end; }
.msg--out p { background: var(--accent); color: var(--accent-ink); border-bottom-right-radius: 6px; }
.msg small { display: block; margin: 3px 6px 0; font-size: 11px; color: var(--faint); }
.msg--out small { text-align: right; }
.chat__form { display: grid; gap: 8px; padding: 12px; border-top: 1px solid var(--line); background: var(--card); }
.chat__name, .chat__row textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: 12px; background: var(--paper); color: var(--ink); font: 15px/1.4 var(--sans); resize: none; }
.chat__name:focus, .chat__row textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.chat__row { display: flex; gap: 8px; align-items: flex-end; }
.chat__row textarea { max-height: 120px; }
.chat__send { flex-shrink: 0; width: 44px; height: 44px; border: 0; border-radius: 12px; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
.chat__send[disabled] { opacity: .5; }
.chat__note { margin: 0; font-size: 11px; color: var(--faint); }
.chat__note a { color: var(--muted); }
@media (max-width: 760px) {
  .chat { right: 12px; bottom: 76px; }
  .chat__launch { width: 54px; padding: 0; justify-content: center; }
  .chat__launch-text { display: none; }
  .chat--open { inset: 0; right: 0; bottom: 0; }
  .chat__panel { width: 100vw; height: 100dvh; border-radius: 0; border: 0; }
}
@media (min-width: 1061px) and (max-width: 1240px) { .topnav { gap: 18px; } }