:root {
  --ink: #16263d;
  --ink2: #22385a;
  --plaster: #eef0f2;
  --paper: #fff;
  --line: #d5dae0;
  --sun: #f2b705;
  --text: #1b2430;
  --mute: #5b6675;
  --r: 10px;
}
* {
  box-sizing: border-box;
  margin: 0;
}
html {
  scroll-behavior: smooth !important;
  scroll-padding-top: 80px;
}
body {
  font:
    16px/1.6 "Segoe UI",
    system-ui,
    -apple-system,
    Roboto,
    Arial,
    sans-serif;
  color: var(--text);
  background: var(--paper);
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
}
:focus-visible {
  outline: 3px solid var(--sun);
  outline-offset: 2px;
}
.wrap {
  width: min(1120px, 100% - 32px);
  margin-inline: auto;
}
section {
  padding: 56px 0;
}
h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.01em;
}
h2 {
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  margin-bottom: 12px;
}
.lead {
  color: var(--mute);
  max-width: 60ch;
  margin-bottom: 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 48px;
  padding: 0 24px;
  border: 0;
  border-radius: var(--r);
  background: var(--sun);
  color: #1b1500;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover {
  filter: brightness(1.07);
}
.btn.ghost {
  background: transparent;
  border: 2px solid currentColor;
  color: inherit;
}
/* header */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--ink);
  color: #fff;
}
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.logo {
  font-weight: 800;
  text-decoration: none;
  font-size: 1.15rem;
}
nav ul {
  list-style: none;
  padding: 0;
  display: none;
  gap: 4px;
}
nav a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 12px;
  text-decoration: none;
  color: #d8e0ec;
}
nav a:hover {
  color: #fff;
}
.burger {
  margin-left: auto;
  width: 48px;
  height: 48px;
  background: none;
  border: 0;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
}
header.open nav ul {
  display: flex;
  flex-direction: column;
  position: absolute;
  inset: 64px 0 auto;
  background: var(--ink);
  padding: 8px 16px 16px;
}
/* hero */
.hero {
  background:
    linear-gradient(rgba(22, 38, 61, 0.6), rgba(22, 38, 61, 0.6)),
    repeating-linear-gradient(
      0deg,
      transparent 0 39px,
      rgba(255, 255, 255, 0.06) 39px 40px
    ),
    url('images/zaid-ali-1-Ss58K4D28-unsplash.jpg') center/cover no-repeat, 
    repeating-linear-gradient(
      90deg,
      transparent 0 39px,
      rgba(255, 255, 255, 0.06) 39px 40px
    ),
    var(--ink);
  color: #fff;
  padding: 72px 0 80px;

  min-height: 65vh; /* Занимает минимум 65% высоты экрана */
  display: flex;
  align-items: center; /* Центрирует текст по вертикали */
  padding: 80px 0;
}
.hero h1 {
  font-size: clamp(2rem, 8vw, 3.8rem);
  /* max-width: 18ch; */
  margin-bottom: 16px;
}
.hero p {
  font-size: 1.1rem;
  color: #cfd9e8;
  max-width: 52ch;
  margin-bottom: 28px;
}
.hero .row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
/* cards */
.grid {
  display: grid;
  gap: 16px;
}
.card {
  background: var(--plaster);
  border-radius: var(--r);
  padding: 24px;
  border-left: 6px solid var(--sun);
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.card ul {
  padding-left: 18px;
  color: var(--mute);
}
.card .btn {
  margin-top: auto;
  background: var(--ink);
  color: #fff;
}
.why {
  background: var(--plaster);
}
.why .item {
  background: var(--paper);
  border-radius: var(--r);
  padding: 20px;
}
.why h3 {
  margin-bottom: 6px;
}
/* portfolio */
.filters {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 16px;
}
.filters button {
  flex: none;
  min-height: 48px;
  padding: 0 20px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: none;
  font: inherit;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}
.filters button[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
}
.track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 12px;
}
.case {
  flex: 0 0 85%;
  scroll-snap-align: start;
  border-radius: var(--r);
  overflow: hidden;
  background: var(--plaster);
}
.case[hidden] {
  display: none;
}
.ph {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--a), var(--b));
  position: relative;
}
.ph img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.case figcaption {
  padding: 14px 16px;
}
.case small {
  color: var(--mute);
}
.arrows {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.arrows button {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  background: none;
  font-size: 1.3rem;
  cursor: pointer;
}
/* steps */
.steps {
  list-style: none;
  padding: 0;
  counter-reset: s;
  display: grid;
  gap: 16px;
}
.steps li {
  counter-increment: s;
  position: relative;
  padding: 4px 0 4px 60px;
}
.steps li::before {
  content: counter(s);
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--sun);
  display: grid;
  place-items: center;
  font-weight: 800;
}
.steps h3 {
  font-size: 1.1rem;
}
.steps p {
  color: var(--mute);
}
/* contact */
.contact {
  background: var(--ink);
  color: #fff;
}
.contact .lead {
  color: #cfd9e8;
}
form {
  display: grid;
  gap: 14px;
  background: var(--paper);
  color: var(--text);
  padding: 24px;
  border-radius: var(--r);
}
label {
  display: grid;
  gap: 6px;
  font-weight: 600;
}
input,
select {
  min-height: 48px;
  padding: 0 14px;
  border: 2px solid var(--line);
  border-radius: 8px;
  font: inherit;
}
input[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: #c62828;
}
.err {
  color: #c62828;
  font-weight: 400;
  font-size: 0.9rem;
  min-height: 1.2em;
}
.hp {
  position: absolute;
  left: -9999px;
}
#status {
  font-weight: 600;
}
.info {
  display: grid;
  gap: 8px;
  align-content: start;
  font-style: normal;
}
.info a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
}
footer {
  background: #0f1b2d;
  color: #9fb0c8;
  padding: 20px 0;
  font-size: 0.9rem;
}
/* floating messenger */
.fab {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}
.fab-links {
  display: none;
  flex-direction: column;
  gap: 8px;
}
.fab.open .fab-links {
  display: flex;
}
.fab a,
.fab > button {
  min-height: 48px;
  min-width: 48px;
  padding: 0 18px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  text-decoration: none;
  color: #fff;
  border: 0;
  font: inherit;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}
.fab .tg {
  background: #229ed9;
}
.fab .wa {
  background: #25a244;
}
.fab > button {
  background: var(--sun);
  color: #1b1500;
  font-weight: 700;
}
/* modal */
dialog {
  border: 0;
  border-radius: var(--r);
  padding: 24px;
  width: min(520px, calc(100% - 32px));
}
dialog::backdrop {
  background: rgba(10, 20, 35, 0.6);
}
dialog h3 {
  margin-bottom: 10px;
}
dialog ul {
  padding-left: 18px;
  margin: 10px 0 18px;
}
dialog .x {
  float: right;
  width: 48px;
  height: 48px;
  border: 0;
  background: none;
  font-size: 1.6rem;
  cursor: pointer;
  margin: -12px -12px 0 0;
}
/* motion */
.btn,
.card,
.case,
.filters button,
.arrows button {
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s,
    color 0.2s,
    filter 0.2s;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
}
.btn:active,
.filters button:active,
.arrows button:active {
  transform: scale(0.96);
}
.card:hover,
.case:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(22, 38, 61, 0.14);
}
.arrows button:hover {
  background: var(--ink);
  color: #fff;
}
.filters button:hover {
  background: var(--ink2);
  color: #fff;
}
header {
  transition: box-shadow 0.3s;
}
header.scrolled {
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.hero h1,
.hero p,
.hero .row {
  animation: rise 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
.hero p {
  animation-delay: 0.15s;
}
.hero .row {
  animation-delay: 0.3s;
}
.rv {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.6s ease,
    transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--d, 0s);
}
.rv.in {
  opacity: 1;
  transform: none;
}
@keyframes pop {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.case:not([hidden]) {
  animation: pop 0.35s ease both;
}
input,
select {
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}
input:focus,
select:focus {
  border-color: var(--ink2);
  box-shadow: 0 0 0 3px rgba(242, 183, 5, 0.45);
  outline: 0;
}
@keyframes shake {
  20%,
  60% {
    transform: translateX(-6px);
  }
  40%,
  80% {
    transform: translateX(6px);
  }
}
form.shake {
  animation: shake 0.4s;
}
#status {
  transition: opacity 0.3s;
}
dialog[open] {
  animation: pop 0.25s ease;
}
dialog::backdrop {
  animation: fade 0.25s ease;
}
@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes ring {
  0% {
    box-shadow: 0 0 0 0 rgba(242, 183, 5, 0.7);
  }
  100% {
    box-shadow: 0 0 0 18px rgba(242, 183, 5, 0);
  }
}
.fab > button {
  animation: ring 1.6s ease-out 1.5s 3;
}
.fab-links {
  animation: rise 0.25s ease both;
}
/* faq */
.faq {
  display: grid;
  gap: 10px;
  max-width: 760px;
}
.faq details {
  border: 2px solid var(--line);
  border-radius: var(--r);
  transition:
    border-color 0.2s,
    background-color 0.2s;
}
.faq details[open] {
  border-color: var(--sun);
  background: var(--plaster);
}
.faq summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  min-height: 56px;
  padding: 8px 18px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  flex: none;
  font-size: 1.6rem;
  line-height: 1;
  transition: transform 0.3s;
}
.faq details[open] summary::after {
  transform: rotate(45deg);
}
.faq .ans {
  padding: 0 18px 16px;
  color: var(--mute);

}
@media (min-width: 480px) {
  .case {
    flex-basis: 70%;
  }
}
@media (min-width: 768px) {
  section {
    padding: 80px 0;
  }
  .grid.c3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid.c2 {
    grid-template-columns: 1fr 1fr;
  }
  .case {
    flex-basis: 46%;
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}
@media (min-width: 1024px) {
  .burger {
    display: none;
  }
  nav ul {
    display: flex;
  }
  .case {
    flex-basis: calc((100% - 32px) / 3);
  }
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (prefers-reduced-motion: reduce) {
  /* Запрещаем анимации и стандартные переходы, но оставляем нативный скролл в покое */
  *:not(.dynamic-word),
  ::before,
  ::after {
    animation: none !important;
  }

  html { scroll-behavior: auto; }

  .rv {
    opacity: 1;
    transform: none;
  }
}

/* project page */
.figure-link,
.case a {
  text-decoration: none;
}
.case {
  position: relative;
}
.case a::after {
  content: "";
  position: absolute;
  inset: 0;
}
.crumbs {
  padding: 12px 0;
  font-size: 0.9rem;
  color: var(--mute);
}
.crumbs a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
}
.cs h1 {
  font-size: clamp(1.8rem, 6vw, 3rem);
  margin: 8px 0 20px;
}
.cs h2 {
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  margin: 40px 0 12px;
}
.cs section {
  padding: 0;
}
.cs .hero-img {
  aspect-ratio: 16/10;
  border-radius: var(--r);
  overflow: hidden;
}
.facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 20px 0;
  padding: 0;
}
.facts div {
  background: var(--plaster);
  border-radius: var(--r);
  padding: 12px 16px;
  border-left: 4px solid var(--sun);
}
.facts dt {
  font-size: 0.85rem;
  color: var(--mute);
}
.facts dd {
  margin: 0;
  font-weight: 700;
}
.cs ul.works {
  padding-left: 20px;
  display: grid;
  gap: 4px;
}
.gal {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.gal .ph {
  border: 0;
  border-radius: var(--r);
  overflow: hidden;
  cursor: zoom-in;
  padding: 0;
  transition:
    transform 0.2s,
    filter 0.2s;
}
.gal .ph:hover {
  transform: scale(1.02);
  filter: brightness(1.08);
}
.ba {
  position: relative;
  aspect-ratio: 16/10;
  border-radius: var(--r);
  overflow: hidden;
  --p: 50%;
  touch-action: pan-y;
}
.ba .ph {
  position: absolute;
  inset: 0;
  aspect-ratio: auto;
}
.ba .before {
  clip-path: inset(0 calc(100% - var(--p)) 0 0);
}
.ba::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--p);
  width: 3px;
  background: var(--sun);
  pointer-events: none;
}
.ba input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: ew-resize;
  margin: 0;
  z-index: 2;
}
.ba input:focus-visible ~ .tag {
  outline: 3px solid var(--sun);
}
.ba .tag {
  position: absolute;
  bottom: 10px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(22, 38, 61, 0.8);
  color: #fff;
  font-size: 0.85rem;
  z-index: 1;
}
.ba .tag.l {
  left: 10px;
}
.ba .tag.r {
  right: 10px;
}
blockquote {
  border-left: 6px solid var(--sun);
  padding: 6px 0 6px 18px;
  font-size: 1.1rem;
}
blockquote footer {
  background: none;
  padding: 6px 0 0;
  color: var(--mute);
  font-size: 0.9rem;
}
.cta-band {
  background: var(--ink);
  color: #fff;
  border-radius: var(--r);
  padding: 28px;
  margin: 40px 0;
  display: grid;
  gap: 14px;
  justify-items: start;
}
.more .card {
  text-decoration: none;
  color: inherit;
}
#lb {
  width: min(960px, 100% - 16px);
  background: #0d1626;
  color: #fff;
  padding: 0;
  overflow: hidden;
}
#lb .lbi {
  aspect-ratio: 4/3;
  max-height: 80vh;
  width: 100%;
  touch-action: pan-y;
}
#lb .ph img {
  object-fit: contain;
  background: #0d1626;
}
#lb .bar2 {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 8px;
}
#lb button {
  min-width: 48px;
  min-height: 48px;
  background: none;
  border: 0;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  float: none;
  margin: 0;
}
@media (min-width: 768px) {
  .gal {
    grid-template-columns: repeat(3, 1fr);
  }
  .facts {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* меню: плавное раскрытие и подсветка */
nav a {
  transition:
    color 0.2s,
    box-shadow 0.2s;
}
nav a.active {
  color: #fff;
  box-shadow: inset 0 -3px var(--sun);
}
.burger {
  transition: transform 0.25s;
}
header.open .burger {
  transform: rotate(90deg);
}
@media (max-width: 1023px) {
  nav ul {
    display: flex;
    flex-direction: column;
    position: absolute;
    inset: 64px 0 auto;
    background: var(--ink);
    padding: 8px 16px 16px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition:
      opacity 0.25s ease,
      transform 0.25s ease,
      visibility 0.25s;
  }
  header.open nav ul {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  nav a.active {
    box-shadow: inset 4px 0 var(--sun);
    padding-left: 16px;
  }
}

/* Динамическое слово */
.dynamic-word {
  display: inline-block;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.4s ease,
              filter 0.4s ease;
  will-change: transform, opacity, filter;
}

/* Улетает вверх, исчезает и размывается */
.dynamic-word.fade-out {
  opacity: 0;
  transform: translateY(-15px);
  filter: blur(4px);
}

/* Направляем вылет: сначала прячем снизу */
.dynamic-word.prepare-in {
  opacity: 0;
  transform: translateY(15px);
  filter: blur(4px);
  transition: none; /* Мгновенный сброс без анимации */
}

.track {
  scroll-behavior: smooth;
}

/* плавное появление карточек при смене фильтра */
.case {
  animation: caseIn .45s ease both;
}
.case.out {
  opacity: 0;
  transform: scale(.96);
  transition: opacity .2s, transform .2s;
}
@keyframes caseIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .case { animation: none; }
  .track { scroll-behavior: auto; }
}


/* FAQ: аккуратный hover */
.faq details {
  transition:
    border-color 0.25s,
    background-color 0.25s,
    box-shadow 0.25s,
    transform 0.25s;
}
.faq summary {
  transition: color 0.25s, padding-left 0.25s;
}
.faq summary::after {
  transition: transform 0.3s, color 0.25s;
}

@media (hover: hover) {
  .faq details:hover {
    border-color: var(--sun);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
  }
  .faq details:hover summary {
    padding-left: 24px;          /* текст чуть сдвигается вправо */
    color: var(--sun);
  }
  .faq details:hover summary::after {
    color: var(--sun);
    transform: rotate(90deg);    /* плюс слегка поворачивается */
  }
  /* у открытого вопроса крестик остаётся повёрнутым на 45° */
  .faq details[open]:hover summary::after {
    transform: rotate(45deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .faq details,
  .faq summary,
  .faq summary::after {
    transition: none;
  }
  .faq details:hover {
    transform: none;
  }
}

/* ===== Тёмная тема ===== */
:root {
  color-scheme: light;
  --btn: var(--ink);        /* цвет рамки и текста кнопок-контуров */
  --btn-fg: #fff;           /* текст на залитой кнопке */
  --err: #c62828;
}

:root[data-theme="dark"] {
  color-scheme: dark;       /* тёмные поля ввода, скроллбары, диалоги */
  --paper: #0e1520;
  --plaster: #17212f;
  --line: #2b394d;
  --text: #e6ecf5;
  --mute: #a3b2c7;
  --btn: #e6ecf5;
  --btn-fg: #0e1520;
  --err: #ff8a80;
}

/* использовать --err вместо жёстко заданного красного */
input[aria-invalid="true"],
select[aria-invalid="true"] { border-color: var(--err); }
.err { color: var(--err); }

/* общие поверхности */
dialog { background: var(--paper); color: var(--text); }
input, select { background: var(--paper); color: var(--text); }

/* кнопки, у которых цвет раньше брался из --ink */
:root[data-theme="dark"] .filters button,
:root[data-theme="dark"] .arrows button {
  border-color: var(--btn);
  color: var(--btn);
}
:root[data-theme="dark"] .filters button[aria-pressed="true"] {
  background: var(--btn);
  color: var(--btn-fg);
}
:root[data-theme="dark"] .arrows button:hover {
  background: var(--btn);
  color: var(--btn-fg);
}
:root[data-theme="dark"] .card .btn {
  background: var(--btn);
  color: var(--btn-fg);
}

/* форма на тёмной секции контактов, футер, карточки, изображения */
:root[data-theme="dark"] form { background: var(--plaster); }
:root[data-theme="dark"] footer { background: #080d15; border-top: 1px solid var(--line); }
:root[data-theme="dark"] .card:hover { box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5); }
:root[data-theme="dark"] img { filter: brightness(0.9); }

/* ===== Кнопка переключения ===== */
.theme-toggle {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-left: auto;
  background: none;
  border: 0;
  color: #fff;
  cursor: pointer;
  border-radius: 50%;
  transition: background-color 0.2s, transform 0.3s;
}
.theme-toggle:hover { background: rgba(255, 255, 255, 0.12); transform: rotate(15deg); }
.theme-toggle svg { grid-area: 1 / 1; transition: opacity 0.25s, transform 0.4s; }
.theme-toggle .i-sun  { opacity: 0; transform: rotate(-90deg) scale(0.6); }
:root[data-theme="dark"] .theme-toggle .i-sun  { opacity: 1; transform: none; }
:root[data-theme="dark"] .theme-toggle .i-moon { opacity: 0; transform: rotate(90deg) scale(0.6); }

.burger { margin-left: 0; }
@media (min-width: 1024px) {
  nav { margin-left: auto; }
  .theme-toggle { order: 2; margin-left: 12px; }
}

/* плавная смена темы (включается на время переключения) */
.theme-anim *,
.theme-anim *::before,
.theme-anim *::after {
  transition: background-color 0.35s, color 0.35s, border-color 0.35s, box-shadow 0.35s !important;
}



/* ===== Переключатель языка ===== */
.lang { position: relative; margin-left: auto; }
.lang-btn {
  display: flex; align-items: center; gap: 6px;
  height: 48px; padding: 0 10px;
  background: none; border: 0; border-radius: 10px;
  color: #fff; font: inherit; font-weight: 700; cursor: pointer;
  transition: background-color 0.2s;
}
.lang-btn:hover { background: rgba(255, 255, 255, 0.12); }
.lang-btn svg:last-child { transition: transform 0.25s; }
.lang-btn[aria-expanded="true"] svg:last-child { transform: rotate(180deg); }

.lang-menu {
  position: absolute; right: 0; top: calc(100% + 6px);
  min-width: 160px; margin: 0; padding: 6px; list-style: none;
  background: var(--ink2); border-radius: var(--r);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
  animation: langIn 0.18s ease;
}
.lang-menu[hidden] { display: none; }
.lang-menu button {
  display: flex; align-items: center; width: 100%; min-height: 44px;
  padding: 0 12px; background: none; border: 0; border-radius: 8px;
  color: #d8e0ec; font: inherit; text-align: left; cursor: pointer;
}
.lang-menu button:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }
.lang-menu button[aria-checked="true"] {
  color: #fff; font-weight: 700; box-shadow: inset 3px 0 var(--sun);
}
@keyframes langIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}

/* расположение: телефон — [лого ... язык тема бургер], компьютер — [лого ... меню язык тема] */
.theme-toggle { margin-left: 0; }
@media (min-width: 1024px) {
  .lang { order: 2; margin-left: 12px; }
  .theme-toggle { order: 3; margin-left: 4px; }
}


/* ===== Кнопка «Наверх» ===== */
.to-top {
  position: fixed;
  left: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  z-index: 29;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--btn);
  color: var(--btn-fg);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  cursor: pointer;

  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.9);
  transition: opacity 0.3s, transform 0.3s, visibility 0.3s, box-shadow 0.2s;
}
.to-top.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}
.to-top:active { transform: scale(0.94); }

.to-top svg { grid-area: 1 / 1; }
.to-top .ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);            /* прогресс начинается сверху */
}
.to-top .ring circle {
  fill: none;
  stroke-width: 3;
}
.to-top .ring-track { stroke: currentColor; opacity: 0.18; }
.to-top .ring-bar {
  stroke: var(--sun);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.15s linear;
}
.to-top .arrow { transition: transform 0.25s; }
.to-top:hover .arrow { transform: translateY(-2px); }