/* ============================================================
   Портфолио Юры Торопыгина — стиль по DESIGN.md (Mercury)
   Оникс-фон, графитовые карточки, единственный кобальтовый акцент
   ============================================================ */

:root {
  /* Цвета */
  --color-onyx: #171721;
  --color-graphite: #1e1e2a;
  --color-obsidian: #272735;
  --color-slate-border: #70707d;
  --color-mist-border: #e2e3ed;
  --color-ash: #c3c3cc;
  --color-ivory: #ededf3;
  --color-cobalt: #5266eb;
  --color-white: #ffffff;

  /* Шрифты */
  --font-body: 'Manrope', ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: 'Archivo', ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Радиусы */
  --radius-cards: 12px;
  --radius-pill: 40px;

  /* Сетка */
  --page-max: 1200px;
  --section-gap: 112px;

  /* Движение */
  --ease-out: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-spring: cubic-bezier(0.34, 1.3, 0.4, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--color-onyx);
  color: var(--color-ivory);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--color-cobalt); color: var(--color-white); }

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* Плёночное зерно поверх всего — фиксированное, не мешает кликам */
.grain {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== Типографика ===== */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 480;
  color: var(--color-ivory);
}

h2 {
  font-size: clamp(32px, 4.5vw, 42px);
  line-height: 1.15;
  letter-spacing: 0.01em;
}

h3 {
  font-size: 21px;
  line-height: 1.25;
  letter-spacing: 0.015em;
}

p { color: var(--color-ash); }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 480;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ash);
  border: 1px solid rgba(237, 237, 243, 0.18);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  margin-bottom: 24px;
}

/* ===== Кнопки ===== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  border-radius: 32px;
  padding: 10px 22px;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.5s var(--ease-out), background-color 0.5s var(--ease-out),
              border-color 0.5s var(--ease-out), opacity 0.5s var(--ease-out);
}

.btn:active { transform: scale(0.98); }

.btn--primary {
  background: var(--color-cobalt);
  color: var(--color-white);
}
.btn--primary:hover { background: #4256d6; }

.btn--ghost {
  background: transparent;
  color: var(--color-ivory);
  border: 1px solid var(--color-ivory);
  border-radius: var(--radius-pill);
}
.btn--ghost:hover { background: rgba(237, 237, 243, 0.08); }

.btn--lg { padding: 14px 28px; }

/* Стрелка в собственном круге внутри кнопки */
.btn__icon {
  width: 28px;
  height: 28px;
  margin-right: -8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  font-size: 14px;
  transition: transform 0.5s var(--ease-spring);
}
.btn:hover .btn__icon { transform: translate(2px, -1px) scale(1.05); }

/* ===== Навигация ===== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background-color 0.5s var(--ease-out), backdrop-filter 0.5s var(--ease-out),
              border-color 0.5s var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(23, 23, 33, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(237, 237, 243, 0.08);
}

.nav__inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 480;
  font-size: 18px;
  letter-spacing: 0.01em;
}

.nav__brand-mark {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-cobalt);
  box-shadow: 0 0 0 4px rgba(82, 102, 235, 0.25);
}

.nav__links {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.nav__links a {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  color: var(--color-ivory);
  transition: background-color 0.4s var(--ease-out);
}
.nav__links a:hover { background: rgba(237, 237, 243, 0.08); }

.nav__cta { font-size: 15px; padding: 9px 18px; }

/* Бургер */
.nav__burger {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(237, 237, 243, 0.2);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  margin-left: auto;
}
.nav__burger span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1.5px;
  background: var(--color-ivory);
  transition: transform 0.5s var(--ease-out);
}
.nav__burger span:nth-child(1) { top: 17px; }
.nav__burger span:nth-child(2) { bottom: 17px; }
.nav__burger.open span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }

/* Мобильное меню */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(23, 23, 33, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease-out), visibility 0.5s;
}
.mobile-menu.open { opacity: 1; visibility: visible; }

.mobile-menu__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}
.mobile-menu__links a {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 480;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
  transition-delay: calc(var(--i) * 70ms);
}
.mobile-menu.open .mobile-menu__links a {
  opacity: 1;
  transform: translateY(0);
}
.mobile-menu__links .btn { font-size: 18px; }

/* ===== Главный экран ===== */

.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 24px 72px;
  overflow: hidden;
}

/* Фоновое видео: затемнено и приглушено, чтобы текст читался */
.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  filter: brightness(0.5) saturate(0.75);
}

/* Затемнение поверх видео + плавный переход в фон страницы снизу */
.hero__shade {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom,
      rgba(23, 23, 33, 0.72) 0%,
      rgba(23, 23, 33, 0.45) 35%,
      rgba(23, 23, 33, 0.55) 65%,
      var(--color-onyx) 96%);
}

.hero__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 45% at 50% -5%, rgba(82, 102, 235, 0.22), transparent 65%),
    radial-gradient(ellipse 40% 35% at 85% 100%, rgba(82, 102, 235, 0.10), transparent 70%),
    radial-gradient(ellipse 45% 40% at 8% 85%, rgba(39, 39, 53, 0.9), transparent 70%);
}

.hero__content {
  position: relative;
  max-width: 760px;
}

.hero__title {
  font-size: clamp(36px, 6.2vw, 65px);
  line-height: 1.1;
  letter-spacing: 0.005em;
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: 18px;
  line-height: 1.55;
  max-width: 560px;
  margin: 0 auto 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Полоса с цифрами */
.hero__stats {
  position: relative;
  margin-top: 88px;
  width: 100%;
  max-width: var(--page-max);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.stat {
  background: var(--color-graphite);
  border-radius: var(--radius-cards);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat__value {
  font-family: var(--font-display);
  font-weight: 530;
  font-size: 32px;
  letter-spacing: 0.015em;
  color: var(--color-ivory);
}

.stat__label {
  font-size: 14px;
  color: var(--color-ash);
  line-height: 1.35;
}

/* ===== Секции ===== */

.section {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--section-gap) 24px 0;
}

.section__head {
  max-width: 640px;
  margin-bottom: 56px;
}

.section__lead {
  margin-top: 16px;
  font-size: 18px;
  line-height: 1.5;
}

/* ===== Карточки ===== */

.card {
  background: var(--color-graphite);
  border-radius: var(--radius-cards);
  padding: 32px;
}

.card h3 { margin-bottom: 12px; }

.card--service { position: relative; padding-top: 40px; }

.card__num {
  display: block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 480;
  letter-spacing: 0.15em;
  color: var(--color-cobalt);
  margin-bottom: 20px;
}

/* ===== Работы ===== */

.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

/* Двойная рамка: внешняя оболочка + видео внутри */
.work {
  background: rgba(237, 237, 243, 0.04);
  border: 1px solid rgba(237, 237, 243, 0.07);
  border-radius: 20px;
  padding: 8px;
  cursor: pointer;
  transition: transform 0.7s var(--ease-out), border-color 0.7s var(--ease-out);
}
.work:hover {
  transform: translateY(-4px);
  border-color: rgba(237, 237, 243, 0.16);
}

.work__frame {
  position: relative;
  border-radius: 13px;
  overflow: hidden;
  aspect-ratio: 9 / 16;
  background: var(--color-graphite);
}

.work__frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Затемнение снизу с названием */
.work__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  background: linear-gradient(to top, rgba(23, 23, 33, 0.85) 0%, transparent 45%);
}

.work__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 480;
  letter-spacing: 0.01em;
  color: var(--color-ivory);
  margin-bottom: 8px;
}

.work__tags { display: flex; gap: 6px; flex-wrap: wrap; }

.work__tag {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ash);
  border: 1px solid rgba(237, 237, 243, 0.2);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  backdrop-filter: none;
}

/* Кнопка play по центру */
.work__play {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 64px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(23, 23, 33, 0.55);
  border: 1px solid rgba(237, 237, 243, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.work__play::before {
  content: "";
  width: 0;
  height: 0;
  margin-left: 4px;
  border-style: solid;
  border-width: 10px 0 10px 16px;
  border-color: transparent transparent transparent var(--color-ivory);
}
.work:hover .work__play {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.85);
}

/* ===== Обо мне ===== */

.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.about__text p { margin-top: 16px; font-size: 17px; line-height: 1.6; }
.about__text h2 { margin-bottom: 8px; }

.about__cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===== Услуги ===== */

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

/* ===== Контакты ===== */

.contact {
  background: var(--color-graphite);
  border-radius: 20px;
  padding: 72px 32px;
  text-align: center;
}

.contact .section__lead { max-width: 480px; margin-left: auto; margin-right: auto; }

.contact__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

/* ===== Подвал ===== */

.footer {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 72px 24px 40px;
  text-align: center;
}

.footer p { font-size: 13px; color: var(--color-ash); }
.footer__note { margin-top: 8px; font-size: 11px; opacity: 0.6; }

/* ===== Полноэкранный просмотр ===== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(23, 23, 33, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--ease-out), visibility 0.4s;
}
.lightbox.open { opacity: 1; visibility: visible; }

.lightbox__body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-width: 100%;
  transform: translateY(24px) scale(0.98);
  transition: transform 0.5s var(--ease-out);
}
.lightbox.open .lightbox__body { transform: translateY(0) scale(1); }

.lightbox video {
  max-height: min(78dvh, 820px);
  max-width: min(92vw, 460px);
  border-radius: var(--radius-cards);
  background: #000;
}

.lightbox__info { text-align: center; max-width: 460px; }
.lightbox__info h3 { margin-bottom: 6px; }
.lightbox__info p { font-size: 14px; }

.lightbox__close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(237, 237, 243, 0.3);
  background: rgba(39, 39, 53, 0.6);
  color: var(--color-ivory);
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}
.lightbox__close:hover { background: var(--color-obsidian); transform: rotate(90deg); }

/* ===== Появление при скролле ===== */

.reveal {
  opacity: 0;
  transform: translateY(32px);
  filter: blur(6px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out), filter 0.9s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ===== Адаптив ===== */

@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr; }
  .about { grid-template-columns: 1fr; gap: 32px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-gap: 72px; }

  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: block; }

  .hero { padding: 120px 16px 56px; }
  .hero__stats { margin-top: 56px; }

  .section { padding-left: 16px; padding-right: 16px; }

  .works-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }

  .contact { padding: 56px 20px; }

  .lightbox__close { top: 16px; right: 16px; }
}

@media (max-width: 480px) {
  .hero__stats { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat { padding: 18px 14px; }
  .stat__value { font-size: 26px; }
  .works-grid { grid-template-columns: 1fr 1fr; }
  .work { padding: 5px; border-radius: 14px; }
  .work__frame { border-radius: 10px; }
  .work__overlay { padding: 12px; }
  .work__title { font-size: 13px; }
  .work__tag { font-size: 9px; padding: 2px 7px; }
  .work__play { width: 44px; height: 44px; }
  .work__play::before { border-width: 7px 0 7px 11px; }
}