/* ========== ЭТАП 0: Глобальные стили ========== */

/* CSS Reset (упрощённый, mobile-first) */
*,
*::before,
*::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

/* Палітра (свежая, небанальная) */
:root {
  --bg: #0e1116;
  --surface: #141922;
  --surface-2: #1a2130;
  --text: #e6e9ef;
  --muted: #aeb7c4;
  --primary: #8ae6ff;       /* холодный неон */
  --accent: #ffd28a;        /* мягкий персиковый */
  --line: #283041;
  --success: #7af0b6;
  --danger: #ff8aa1;

  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

/* Типографика */
body {
  font-family: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background:
    radial-gradient(60rem 60rem at 120% -10%, rgba(138,230,255,0.15), transparent 60%),
    radial-gradient(40rem 40rem at -20% 110%, rgba(255,210,138,0.12), transparent 60%),
    var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code, kbd, pre { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }

.container {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

.visually-hidden { 
  position: absolute !important; 
  height: 1px; width: 1px; 
  overflow: hidden; clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap; 
}

/* Кнопки/ссылки-CTA */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .9rem 1.1rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #121418;
  font-weight: 700;
  box-shadow: var(--shadow);
  transition: transform .15s ease, opacity .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); opacity: .9; }

/* Placeholder секция до появления Hero */
.placeholder { padding: 72px 0; }
.placeholder__text { color: var(--muted); text-align: center; }

/* ========== ЭТАП 1: Header (БЭМ) ========== */

.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14,17,22,.7);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header__inner {
  display: grid; grid-template-columns: 1fr auto auto; align-items: center;
  min-height: 64px; gap: .75rem;
}
.header__brand { display: inline-flex; align-items: center; gap: .6rem; }
.header__logo {
  font-weight: 800; letter-spacing: .2px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-size: 1.1rem;
}

.header__toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--line);
}
.header__toggle i { width: 20px; height: 20px; }

.header__nav { display: none; }
.header__nav.is-open { display: block; }
.nav__list { list-style: none; margin: 0; padding: .75rem 0; }
.nav__item { }
.nav__link {
  display: block; padding: .65rem .75rem; border-radius: 10px;
  color: var(--text);
}
.nav__link:hover { background: var(--surface); }
.nav__link--cta {
  color: #121418; font-weight: 700; margin-top: .25rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

/* Desktop */
@media (min-width: 768px) {
  .header__inner { grid-template-columns: auto 1fr auto; }
  .header__toggle { display: none; }
  .header__nav { display: block; }
  .nav__list { display: flex; align-items: center; gap: .25rem; padding: 0; }
  .nav__link { padding: .6rem .8rem; }
  .nav__link--cta { margin-top: 0; margin-left: .25rem; }
}

/* ========== ЭТАП 2: Footer (БЭМ) ========== */

.footer { margin-top: 40px; border-top: 1px solid var(--line); background: var(--surface-2); }
.footer__grid {
  display: grid; gap: 2rem; padding: 32px 0;
  grid-template-columns: 1fr; 
}
.footer__col { }
.footer__brand {
  display: inline-block; font-weight: 800; margin-bottom: .35rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.footer__tagline { color: var(--muted); margin: 0; }

.footer__title { font-size: .95rem; color: var(--muted); margin: 0 0 .6rem; }
.footer__links, .footer__contacts { list-style: none; margin: 0; padding: 0; }
.footer__links li, .footer__contacts li { margin-bottom: .45rem; }
.footer__links a { color: var(--text); }
.footer__links a:hover { text-decoration: underline; text-decoration-color: var(--accent); }

.footer__contacts i { width: 16px; height: 16px; vertical-align: -3px; margin-right: .45rem; opacity: .8; }
.footer__address address { font-style: normal; color: var(--text); }

.footer__bottom {
  border-top: 1px dashed var(--line);
  background: linear-gradient(180deg, transparent, rgba(255,210,138,0.05));
}
.footer__bottom-inner {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 14px 0;
}
.footer__to-top {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .4rem .6rem; border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); font-size: .9rem;
}
.footer__to-top i { width: 16px; height: 16px; }

/* Footer layout: desktop */
@media (min-width: 860px) {
  .footer__grid { grid-template-columns: 1.2fr 1fr 1fr 1.2fr; }
}

/* Ссылки-фокус для доступности */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Служебные утилиты */
.section-pad { padding: 64px 0; }
.lead { font-size: 1.125rem; color: var(--muted); }

/* Контейнер изображений по умолчанию */
.img-wrap {
  background: linear-gradient(135deg, rgba(138,230,255,.08), rgba(255,210,138,.08));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

/* ========== ЭТАП 3: HERO ========== */
.hero {
  position: relative;
  min-height: clamp(520px, 85vh, 760px);
  display: grid;
  place-items: center;
  padding: 72px 0;
  isolation: isolate;
}
.hero__bg-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: -1; opacity: .45;
  filter: contrast(115%) saturate(105%) blur(0px);
}
.hero__inner { width: min(1120px, 100% - 2rem); }
.hero__content { max-width: 760px; }

.hero__title {
  font-size: clamp(1.8rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  margin: 0 0 .75rem;
  letter-spacing: .2px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lead {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
}
.hero__cta { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: .25rem; }

.hero__cta--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}
.hero__cta--ghost:hover { background: var(--surface); }

.hero__highlights {
  display: grid; gap: .4rem;
  margin: 1.2rem 0 0; padding: 0; list-style: none;
  color: var(--text);
}
.hero__highlights li { display: flex; align-items: center; gap: .5rem; }
.hero__highlights i { width: 18px; height: 18px; opacity: .85; }

/* Лёгкий параллакс-тюнинг на десктопе */
@media (min-width: 860px) {
  .hero { padding: 96px 0; }
}

/* ========== ЭТАП 3: HOW ========== */
.how__header { margin-bottom: 1.2rem; }
.how__title { margin: 0 0 .4rem; font-size: clamp(1.3rem, 3.2vw, 2rem); }
.how__lead { margin: 0; color: var(--muted); }

.how__steps {
  counter-reset: how;
  display: grid; gap: 1rem;
  margin: 1.2rem 0 1.4rem; padding: 0; list-style: none;
}
.how__step {
  display: grid; grid-template-columns: auto 1fr; gap: .9rem;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: .9rem;
}
.how__step-num {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  font-weight: 800; color: #121418;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.how__step-title { margin: 0 0 .2rem; font-size: 1.05rem; }
.how__step-text, .how__micro { margin: 0 0 .35rem; color: var(--muted); }
.how__checks { margin: .3rem 0 0; padding-left: 1.1rem; color: var(--text); }
.how__checks li { margin: .2rem 0; }

.how__code {
  margin-top: .5rem;
  background: #0f141b;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: .75rem .85rem;
  box-shadow: var(--shadow);
  overflow: auto;
}
.how__code code { white-space: pre-wrap; font-size: .92rem; color: var(--text); }
.how__code--compact code { font-size: .88rem; }

.how__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: .6rem;
}
.how-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}
.how-card__title { margin: 0 0 .35rem; font-size: 1.05rem; }
.how-card__text { margin: 0 0 .6rem; color: var(--muted); }
.how-card__cta { margin-top: .5rem; }

.how__tip {
  margin-top: 1rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(138,230,255,.06), transparent);
  padding: .8rem .9rem;
  color: var(--text);
}

/* Desktop layout */
@media (min-width: 900px) {
  .how__steps { grid-template-columns: 1fr 1fr 1fr; }
  .how__step { grid-template-columns: auto 1fr; align-items: start; }
  .how__cards { grid-template-columns: 1fr 1fr 1fr; }
}

/* ========== ЭТАП 3: CASES (табы) ========== */
.cases__header { margin-bottom: .8rem; }
.cases__title { margin: 0 0 .3rem; font-size: clamp(1.3rem, 3.2vw, 2rem); }
.cases__lead { margin: 0; color: var(--muted); }

.tabs { margin-top: .8rem; }
.tabs__list {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: .4rem;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: .35rem;
}
.tabs__tab {
  padding: .6rem .7rem; border-radius: 10px; border: 1px solid transparent;
  background: transparent; color: var(--text); cursor: pointer; text-align: center;
}
.tabs__tab:hover { background: var(--surface); }
.tabs__tab.is-active { background: linear-gradient(135deg, rgba(138,230,255,.15), rgba(255,210,138,.10)); border-color: var(--line); }

.tabs__panels { margin-top: .8rem; }
.tabs__panel[hidden] { display: none; }
.tabs__panel.is-active { display: block; }

.case-grid {
  display: grid; grid-template-columns: 1fr; gap: .9rem;
}
.case-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1rem;
}
.case-card__title { margin: 0 0 .3rem; font-size: 1.05rem; }
.case-card__text { margin: 0 0 .6rem; color: var(--muted); }
.case-card__btn { margin-top: .2rem; }
.case-card__prompt {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}

.cases__cta { margin-top: 1rem; text-align: center; }

/* Desktop */
@media (min-width: 900px) {
  .case-grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* ========== ЭТАП 3: TOOLS ========== */
.tools__header { margin-bottom: .8rem; }
.tools__title { margin: 0 0 .3rem; font-size: clamp(1.3rem, 3.2vw, 2rem); }
.tools__lead { margin: 0; color: var(--muted); }

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: .8rem;
}
.tool-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  display: grid; gap: .5rem;
}
.tool-card__icon i { width: 22px; height: 22px; opacity: .9; }
.tool-card__title { margin: 0; font-size: 1.05rem; }
.tool-card__text { margin: 0; color: var(--muted); }
.tool-card__list { margin: .4rem 0 0; padding-left: 1.1rem; }
.tool-card__list li { margin: .2rem 0; }
.tool-card__cta { margin-top: .4rem; }

.tools__note {
  margin-top: 1rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,210,138,.06), transparent);
  padding: .8rem .9rem;
  color: var(--text);
}

/* Desktop */
@media (min-width: 900px) {
  .tool-grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* ========== ЭТАП 3: FAQ ========== */
.faq__header { margin-bottom: .8rem; }
.faq__title { margin: 0 0 .3rem; font-size: clamp(1.3rem, 3.2vw, 2rem); }
.faq__lead { margin: 0; color: var(--muted); }

.faq__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
  margin-top: .8rem;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}
.faq-item__q { 
  margin: 0 0 .35rem; 
  font-size: 1.05rem; 
  display: flex; align-items: center; gap: .45rem;
}
.faq-item__q i { width: 18px; height: 18px; opacity: .9; }
.faq-item__a { margin: 0; color: var(--muted); }

.faq__cta { margin-top: 1rem; text-align: center; }

/* Desktop */
@media (min-width: 900px) {
  .faq__list { grid-template-columns: 1fr 1fr; }
}

/* ========== ЭТАП 4: CONTACT ========== */
.contact__header { margin-bottom: .8rem; }
.contact__title { margin: 0 0 .3rem; font-size: clamp(1.3rem, 3.2vw, 2rem); }
.contact__lead { margin: 0; color: var(--muted); }

.contact-form {
  margin-top: .9rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}
.contact-form__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .8rem;
}
.field { display: grid; gap: .35rem; }
.field--full { grid-column: 1 / -1; }
.field__label { font-size: .95rem; color: var(--text); }
.field__input {
  background: #0f141b;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: .75rem .85rem;
  color: var(--text);
}
.field__input:focus { outline: 2px solid var(--primary); outline-offset: 2px; }
.field__input--area { resize: vertical; min-height: 140px; }
.field__error { margin: 0; font-size: .9rem; color: var(--danger); min-height: 1em; }

.field--checkbox .checkbox { display: flex; align-items: flex-start; gap: .5rem; }
.field--checkbox input[type="checkbox"] { transform: translateY(.2rem); }

.field--captcha .captcha { display: flex; gap: .5rem; align-items: center; }
.captcha__task {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 96px; padding: .55rem .7rem;
  border-radius: 10px; background: linear-gradient(135deg, rgba(138,230,255,.15), rgba(255,210,138,.10));
  border: 1px solid var(--line); font-weight: 700;
}
.captcha__input { flex: 1; }
.captcha__refresh {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--surface-2); cursor: pointer;
}
.captcha__refresh i { width: 18px; height: 18px; }

.contact-form__actions {
  display: flex; align-items: center; gap: .75rem; margin-top: .8rem;
  flex-wrap: wrap;
}
.contact-form__note { margin: 0; color: var(--muted); }

.form-status {
  margin-top: .8rem;
  padding: .8rem .9rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(122,240,182,.08), transparent);
  color: var(--text);
}
.form-status.is-error {
  background: linear-gradient(180deg, rgba(255,138,161,.10), transparent);
}

/* Desktop */
@media (min-width: 900px) {
  .contact-form__grid {
    grid-template-columns: 1fr 1fr;
  }
  .field--captcha { grid-column: 1 / -1; }
}

/* ========== ЭТАП 5: COOKIE POP-UP ========== */
.cookie {
  position: fixed; inset: auto 0 0 0; z-index: 80;
  background: rgba(20, 25, 34, .96);
  border-top: 1px solid var(--line);
  box-shadow: 0 -10px 30px rgba(0,0,0,.25);
}
.cookie__inner {
  display: grid; gap: .75rem; padding: .9rem 0;
  grid-template-columns: 1fr;
}
.cookie__text { color: var(--muted); line-height: 1.5; }
.cookie__text a { text-decoration: underline; text-decoration-color: var(--accent); }
.cookie__actions { display: flex; gap: .5rem; flex-wrap: wrap; }
.cookie__btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .7rem .9rem; border-radius: 12px; border: 1px solid var(--line);
  background: var(--surface-2); color: var(--text); cursor: pointer;
}
.cookie__btn--ghost { background: transparent; }
@media (min-width: 860px) {
  .cookie__inner { grid-template-columns: 1fr auto; align-items: center; }
}

/* ========== ЭТАП 5: СТРАНИЦЫ ПОЛИТИК (фиксированная структура) ========== */
/* Ожидаемая структура:
<main>
  <section class="pages">
    <div class="container">
      <h1>...</h1>
      <p>...</p>
      <h2>...</h2>
      <p>...</p>
      <ul> <li><strong>...</strong></li> <li>... <a>...</a></li> </ul>
    </div>
  </section>
</main>
*/
.pages { padding: 56px 0; }
.pages .container { width: min(860px, 100% - 2rem); }
.pages h1 {
  margin: 0 0 .6rem;
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1.15;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.pages h2 { margin: 1.2rem 0 .4rem; font-size: clamp(1.15rem, 2.6vw, 1.35rem); }
.pages p { margin: .6rem 0; color: var(--text); }
.pages ul { margin: .6rem 0 .6rem 1.2rem; }
.pages li { margin: .35rem 0; }
.pages a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.pages strong { color: var(--text); }
.pages code { background: #0f141b; border: 1px solid var(--line); padding: .05rem .35rem; border-radius: 6px; }
.pages .meta-note {
  margin: .8rem 0; color: var(--muted); font-size: .95rem;
  border-left: 3px solid var(--line); padding-left: .6rem;
}