/* ============================================================
   ВЕБ4 / wb4.ru — основной файл стилей
   Чистый CSS, без фреймворков. Контейнер 1500px.
   Светлая + тёмная тема через CSS-переменные.
   ============================================================ */

/* ---------- Переменные (светлая тема) ---------- */
:root {
  --accent: #c81c38;
  --accent-dark: #a31229;
  --accent-soft: rgba(200, 28, 56, 0.08);
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --card: #ffffff;
  --text: #1b1e24;
  --muted: #5b6470;
  --border: #e6e9ee;
  --shadow: 0 6px 24px rgba(20, 24, 34, 0.07);
  --shadow-hover: 0 12px 36px rgba(20, 24, 34, 0.13);
  --header-bg: rgba(255, 255, 255, 0.92);
  --hero-grad: linear-gradient(135deg, #fdf2f4 0%, #f6f7f9 60%, #ffffff 100%);
}

/* ---------- Тёмная тема ---------- */
html[data-theme="dark"] {
  --accent: #e2405b;
  --accent-dark: #c81c38;
  --accent-soft: rgba(226, 64, 91, 0.12);
  --bg: #12141a;
  --bg-alt: #191c24;
  --card: #1e222c;
  --text: #edf0f4;
  --muted: #9aa3b0;
  --border: #2a2f3b;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 36px rgba(0, 0, 0, 0.5);
  --header-bg: rgba(18, 20, 26, 0.92);
  --hero-grad: linear-gradient(135deg, #221419 0%, #191c24 60%, #12141a 100%);
}

/* ---------- Сброс и база ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Open Sans", "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  transition: background 0.25s ease, color 0.25s ease;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }

h1, h2, h3, h4 {
  font-family: "Montserrat", "Segoe UI", Arial, sans-serif;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 0.6em;
  color: var(--text);
}
h1 { font-size: clamp(1.9rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.container { max-width: 1500px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section--alt { background: var(--bg-alt); }
.section__head { max-width: 760px; margin-bottom: 40px; }
.section__head p { color: var(--muted); }

/* ---------- Кнопки ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px;
  border-radius: 10px;
  font-family: "Montserrat", sans-serif;
  font-weight: 600; font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn--outline { border-color: var(--accent); color: var(--accent); background: transparent; }
.btn--outline:hover { background: var(--accent); color: #fff; }
.btn--ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--lg { padding: 16px 36px; font-size: 16px; }

/* ---------- Шапка ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header__inner { display: flex; align-items: center; gap: 28px; min-height: 76px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: "Montserrat", sans-serif; font-weight: 800; font-size: 24px; color: var(--text); }
.logo:hover { color: var(--text); }
.logo svg { width: 42px; height: 42px; flex: none; }
.logo span em { color: var(--accent); font-style: normal; }

.nav { display: flex; gap: 26px; margin-left: 12px; }
.nav a { color: var(--text); font-weight: 600; font-size: 15px; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a.is-active { color: var(--accent); border-bottom-color: var(--accent); }

.header__actions { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.header__phone { font-family: "Montserrat", sans-serif; font-weight: 700; color: var(--text); white-space: nowrap; }
.header__phone:hover { color: var(--accent); }

.theme-toggle {
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--card);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--muted); transition: all 0.2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.burger { display: none; width: 44px; height: 44px; border: 1px solid var(--border); background: var(--card); border-radius: 10px; cursor: pointer; position: relative; }
.burger span, .burger span::before, .burger span::after {
  content: ""; position: absolute; left: 10px; right: 10px; height: 2px;
  background: var(--text); border-radius: 2px; transition: 0.25s;
}
.burger span { top: 50%; transform: translateY(-50%); }
.burger span::before { top: -7px; }
.burger span::after { top: 7px; }
.burger.is-open span { background: transparent; }
.burger.is-open span::before { top: 0; transform: rotate(45deg); }
.burger.is-open span::after { top: 0; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { background: var(--hero-grad); padding: 90px 0 80px; }
.hero__inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.hero__label { display: inline-block; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; padding: 7px 14px; border-radius: 999px; margin-bottom: 20px; }
.hero p.lead { font-size: 18px; color: var(--muted); max-width: 560px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.hero__stats { display: flex; gap: 40px; margin-top: 44px; flex-wrap: wrap; }
.hero__stat b { display: block; font-family: "Montserrat", sans-serif; font-size: 30px; color: var(--accent); }
.hero__stat span { color: var(--muted); font-size: 14px; }
.hero__art { border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-hover); }

/* ---------- Карточки ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px;
  box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s;
  position: relative; display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card__icon { width: 52px; height: 52px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.card__icon svg { width: 26px; height: 26px; }
.card p { color: var(--muted); font-size: 15px; }
.card .card__link { margin-top: auto; font-weight: 700; font-size: 15px; }
.card .card__link::after { content: " →"; }

.badge {
  position: absolute; top: 18px; right: 18px;
  font-family: "Montserrat", sans-serif; font-size: 11px; font-weight: 700;
  letter-spacing: 0.05em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px; color: #fff; background: var(--accent);
}
.badge--new { background: #0f9d58; }
.badge--rec { background: #e08600; }

/* ---------- Фильтры услуг ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }
.filters button {
  padding: 9px 18px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); font-weight: 600; font-size: 14px;
  cursor: pointer; transition: all 0.2s;
}
.filters button:hover { border-color: var(--accent); color: var(--accent); }
.filters button.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ---------- Кейсы ---------- */
.case-card { overflow: hidden; padding: 0; }
.case-card__media { aspect-ratio: 16/10; display: flex; align-items: flex-end; padding: 22px; color: #fff; font-family: "Montserrat", sans-serif; font-weight: 700; font-size: 20px; }
.case-card__body { padding: 22px 26px 26px; }
.case-card__tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.case-card__tags span { font-size: 12px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 3px 10px; border-radius: 999px; }
.case-card__result { font-weight: 700; color: var(--text); }

.grad-1 { background: linear-gradient(135deg, #c81c38, #7a1030); }
.grad-2 { background: linear-gradient(135deg, #2b3a67, #1a2340); }
.grad-3 { background: linear-gradient(135deg, #0f9d58, #0a6b3c); }
.grad-4 { background: linear-gradient(135deg, #e08600, #a35f00); }
.grad-5 { background: linear-gradient(135deg, #5b3a8e, #38215c); }
.grad-6 { background: linear-gradient(135deg, #14707e, #0b444e); }

/* ---------- Отзывы ---------- */
.review { display: flex; flex-direction: column; }
.review__stars { color: #f5a623; letter-spacing: 3px; margin-bottom: 12px; font-size: 15px; }
.review__author { margin-top: auto; display: flex; align-items: center; gap: 12px; padding-top: 16px; }
.review__avatar { width: 46px; height: 46px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-family: "Montserrat", sans-serif; font-weight: 700; }
.review__author b { display: block; font-size: 15px; }
.review__author span { color: var(--muted); font-size: 13px; }

/* ---------- Преимущества ---------- */
.steps { counter-reset: step; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-family: "Montserrat", sans-serif; font-size: 40px; font-weight: 800;
  color: var(--accent-soft); -webkit-text-stroke: 1px var(--accent);
  display: block; margin-bottom: 10px;
}

/* ---------- FAQ ---------- */
.faq { max-width: 900px; }
.faq details { background: var(--card); border: 1px solid var(--border); border-radius: 14px; margin-bottom: 12px; overflow: hidden; }
.faq summary {
  cursor: pointer; padding: 20px 56px 20px 24px; font-family: "Montserrat", sans-serif;
  font-weight: 600; font-size: 16px; list-style: none; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%);
  font-size: 26px; color: var(--accent); transition: transform 0.2s; line-height: 1;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details > div { padding: 0 24px 20px; color: var(--muted); }

/* ---------- Формы ---------- */
.form-block { background: var(--card); border: 1px solid var(--border); border-radius: 20px; box-shadow: var(--shadow); padding: 44px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .form-field--full { grid-column: 1 / -1; }
.form-field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 13px 16px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text); font: inherit; font-size: 15px;
  transition: border-color 0.2s;
}
.form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--accent); }
.form-field input.is-invalid, .form-field textarea.is-invalid { border-color: #d93025; }
.form-field .field-error { color: #d93025; font-size: 13px; margin-top: 4px; display: none; }
.form-field input.is-invalid ~ .field-error, .form-field textarea.is-invalid ~ .field-error { display: block; }
.form-consent { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; color: var(--muted); }
.form-consent input { margin-top: 3px; }
.form-success { display: none; text-align: center; padding: 30px 0; }
.form-success.is-visible { display: block; }
.form-success b { font-family: "Montserrat", sans-serif; font-size: 20px; color: var(--accent); display: block; margin-bottom: 8px; }

/* ---------- CTA-полоса ---------- */
.cta-band { background: linear-gradient(120deg, var(--accent), var(--accent-dark)); border-radius: 20px; color: #fff; padding: 52px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin: 0 0 6px; }
.cta-band p { color: rgba(255,255,255,0.85); margin: 0; }
.cta-band .btn { background: #fff; color: var(--accent); border-color: #fff; }
.cta-band .btn:hover { background: transparent; color: #fff; }

/* ---------- Модальное окно ---------- */
.modal { position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal.is-open { display: flex; }
.modal__overlay { position: absolute; inset: 0; background: rgba(10, 12, 18, 0.6); backdrop-filter: blur(4px); }
.modal__box { position: relative; background: var(--card); border-radius: 20px; padding: 40px; max-width: 480px; width: 100%; box-shadow: var(--shadow-hover); }
.modal__close { position: absolute; top: 14px; right: 14px; width: 38px; height: 38px; border: none; background: var(--bg-alt); border-radius: 50%; font-size: 20px; cursor: pointer; color: var(--muted); }
.modal__close:hover { color: var(--accent); }

/* ---------- Хлебные крошки ---------- */
.breadcrumbs { padding: 22px 0 0; font-size: 14px; color: var(--muted); }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs span[aria-current] { color: var(--text); }

/* ---------- Страница-заголовок ---------- */
.page-head { padding: 40px 0 56px; background: var(--hero-grad); }
.page-head p { color: var(--muted); max-width: 720px; font-size: 17px; }

/* ---------- Прайс-строки ---------- */
.price-note { font-family: "Montserrat", sans-serif; font-weight: 700; color: var(--accent); }

/* ---------- Контакты ---------- */
.contact-list { list-style: none; padding: 0; margin: 0 0 28px; }
.contact-list li { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 18px; }
.contact-list .card__icon { width: 44px; height: 44px; margin: 0; flex: none; }
.contact-list b { display: block; font-size: 14px; color: var(--muted); font-weight: 600; }
.contact-list a, .contact-list span.val { font-size: 17px; font-weight: 700; color: var(--text); font-family: "Montserrat", sans-serif; }
.contact-list a:hover { color: var(--accent); }

/* ---------- Текстовые (юридические) страницы ---------- */
.legal-text { max-width: 900px; }
.legal-text h2 { font-size: 1.35rem; margin-top: 2em; }
.legal-text p, .legal-text li { color: var(--muted); font-size: 15px; }
.legal-text ul { padding-left: 22px; }

/* ---------- Футер ---------- */
.footer { background: #14161c; color: #b9c0cb; padding: 60px 0 0; margin-top: 72px; }
html[data-theme="dark"] .footer { background: #0c0e13; border-top: 1px solid var(--border); }
.footer a { color: #b9c0cb; }
.footer a:hover { color: #fff; }
.footer__grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 40px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 9px; font-size: 14px; }
.footer .logo { color: #fff; margin-bottom: 14px; }
.footer__about { font-size: 14px; color: #8d95a3; max-width: 320px; }
.footer__legal { border-top: 1px solid rgba(255,255,255,0.1); padding: 26px 0 30px; font-size: 12.5px; color: #8d95a3; }
.footer__legal p { margin-bottom: 8px; }
.footer__links { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 10px; }
.footer__links a { text-decoration: underline; }

/* ---------- Утилиты ---------- */
.mt-32 { margin-top: 32px; }
.text-center { text-align: center; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- Анимация появления ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Адаптивность ---------- */
@media (max-width: 1200px) {
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 992px) {
  .nav { display: none; position: absolute; top: 76px; left: 0; right: 0; background: var(--card); border-bottom: 1px solid var(--border); flex-direction: column; gap: 0; padding: 10px 24px 20px; box-shadow: var(--shadow); }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .burger { display: block; }
  .header__phone { display: none; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__art { display: none; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 48px 0; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-block { padding: 28px 20px; }
  .cta-band { padding: 32px 24px; }
  .footer__grid { grid-template-columns: 1fr; }
  .header__actions .btn { display: none; }
  .hero { padding: 56px 0; }
  .hero__stats { gap: 24px; }
}