/* ============================================================
   SECTIONS.CSS — экраны 2–9 и подвал.
   Токены наследуются из base.css портала Кьюнити.
   ============================================================ */

/* ---------- Общие элементы секций ---------- */

section { position: relative; }

.sec-kicker {
  margin: 0 0 var(--space-3);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 1.1rem + 1.8vw, 2.5rem);
  line-height: 1.1;
  color: var(--color-heading);
  text-wrap: balance;
}

.sec-title span {
  background: var(--gradient-accent-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme='light'] .sec-title span {
  background: linear-gradient(90deg, #5a38a8, #076b79);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

.sec-head--center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.sec-note {
  margin: 0;
  max-width: 32rem;
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-text-60);
}

.sec-note--center { max-width: 44rem; margin-top: var(--space-4); }

.sec-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
  font-size: 0.9375rem;
  color: var(--color-text-80);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.sec-link:hover { color: var(--color-teal); border-bottom-color: var(--color-teal); }
.sec-link i { transition: transform var(--transition-fast); }
.sec-link:hover i { transform: translateX(3px); }

@media (max-width: 720px) {
  .sec-head { flex-direction: column; align-items: flex-start; gap: var(--space-4); margin-bottom: var(--space-8); }
}

/* ============================================================
   2. КАРУСЕЛЬ ЗАПРОСОВ
   ============================================================ */

.tasks {
  padding: var(--space-16) 0 var(--space-20);
  border-top: 1px solid var(--color-border);
}

.tasks__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.tasks__note {
  margin: 0;
  max-width: 24rem;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-60);
}

.tasks__hint {
  display: block;
  margin-top: var(--space-2);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-40);
}

.carousel { position: relative; }

.carousel__viewport {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x proximity;
  cursor: grab;
  /* мягкие края */
  mask-image: linear-gradient(90deg, transparent 0, #000 3%, #000 97%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 3%, #000 97%, transparent 100%);
}

.carousel__viewport::-webkit-scrollbar { display: none; }
.carousel__viewport.is-dragging { cursor: grabbing; scroll-snap-type: none; }

.carousel__track {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-2) var(--space-6);
  width: max-content;
}

/* Карточка запроса */
.tcard {
  position: relative;
  flex: 0 0 auto;
  width: 16.5rem;
  min-height: 13.5rem;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  text-decoration: none;
  overflow: hidden;
  scroll-snap-align: center;
  isolation: isolate;
  transition: transform 420ms cubic-bezier(0.16, 1, 0.3, 1),
              border-color var(--transition-fast);
}

.tcard:hover { transform: translateY(-6px); border-color: transparent; }
.tcard:active { transform: translateY(-2px) scale(0.99); }

/* Переливающаяся заливка: тёплое пятно у курсора + бренд-градиент, который течёт */
.tcard__glow {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  transition: opacity 420ms ease;
  background:
    radial-gradient(340px circle at var(--mx, 50%) var(--my, 50%),
      color-mix(in srgb, var(--color-teal) 20%, transparent), transparent 70%),
    linear-gradient(130deg,
      color-mix(in srgb, var(--color-purple) 18%, transparent) 0%,
      transparent 40%,
      color-mix(in srgb, var(--color-teal) 20%, transparent) 78%,
      color-mix(in srgb, var(--color-purple) 16%, transparent) 100%);
  background-size: auto, 240% 240%;
  background-position: 0 0, 0% 50%;
}

.tcard:hover .tcard__glow {
  opacity: 1;
  animation: tcardFlow 3.6s ease-in-out infinite alternate;
}

@keyframes tcardFlow {
  from { background-position: 0 0, 0% 50%; }
  to   { background-position: 0 0, 100% 50%; }
}

/* Градиентная рамка в один пиксель, переливается вместе с заливкой */
.tcard::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  padding: 1px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 380ms ease;
  background: linear-gradient(130deg,
    var(--color-purple) 0%,
    var(--color-teal) 38%,
    color-mix(in srgb, var(--color-teal) 35%, transparent) 62%,
    var(--color-purple) 100%);
  background-size: 240% 240%;
  background-position: 0% 50%;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
}

.tcard:hover::after {
  opacity: 1;
  animation: tcardBorderFlow 3.6s ease-in-out infinite alternate;
}

@keyframes tcardBorderFlow {
  from { background-position: 0% 50%; }
  to   { background-position: 100% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  .tcard:hover .tcard__glow,
  .tcard:hover::after { animation: none; }
}

.tcard__num {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--color-text-40);
  transition: color var(--transition-fast), letter-spacing 320ms ease;
}

.tcard:hover .tcard__num { color: var(--color-teal); letter-spacing: 0.13em; }

.tcard__text {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.28;
  color: var(--color-heading);
  text-wrap: pretty;
}

.tcard__foot {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-60);
}

.tcard__foot i {
  margin-left: auto;
  color: var(--color-teal);
  transform: translateX(-4px);
  opacity: 0;
  transition: transform 320ms cubic-bezier(0.16, 1, 0.3, 1), opacity 320ms ease;
}

.tcard:hover .tcard__foot { color: var(--color-text-80); }
.tcard:hover .tcard__foot i { transform: translateX(0); opacity: 1; }

/* Стрелки */
.carousel__arrow {
  position: absolute;
  top: calc(50% - var(--space-3));
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  color: var(--color-text-80);
  box-shadow: var(--shadow-lg);
  transition: color var(--transition-fast), border-color var(--transition-fast),
              opacity var(--transition-fast);
}

.carousel__arrow:hover { color: var(--color-teal); border-color: var(--color-border-strong); }
.carousel__arrow[disabled] { opacity: 0.28; pointer-events: none; }
.carousel__arrow--prev { left: calc(-1 * var(--space-5)); transform: translateY(-50%); }
.carousel__arrow--next { right: calc(-1 * var(--space-5)); transform: translateY(-50%); }

@media (max-width: 1180px) {
  .carousel__arrow--prev { left: 0; }
  .carousel__arrow--next { right: 0; }
}

@media (max-width: 720px) {
  .carousel__arrow { display: none; }
  .tasks__head { flex-direction: column; align-items: flex-start; gap: var(--space-4); }
  .tcard { width: 15rem; padding: var(--space-5); }
}

.carousel__progress {
  height: 2px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  overflow: hidden;
}

.carousel__progress i {
  display: block;
  height: 100%;
  width: 22%;
  border-radius: inherit;
  background: var(--gradient-brand-h, linear-gradient(90deg, var(--color-purple), var(--color-teal)));
  transition: transform 120ms linear;
}

/* ============================================================
   3. ГЛУБИНА ПОГРУЖЕНИЯ
   ============================================================ */

.depth {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse 120% 80% at 50% 0%, var(--color-hover-tint), transparent 70%);
}

.depth__head { max-width: 40rem; margin-bottom: var(--space-12); }
.depth__intro {
  margin: var(--space-5) 0 0;
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text-80);
}

/* Путь */
.depth__rail {
  position: relative;
  margin-bottom: var(--space-10);
}

.depth__line {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.depth__line path {
  fill: none;
  stroke-linecap: round;
  stroke-width: 1.4;
  vector-effect: non-scaling-stroke;
}

.depth__line-bg { stroke: var(--color-border-strong); stroke-width: 1.6; opacity: 0.75; }

.depth__line-fg {
  stroke: url(#depthGrad);
  stroke-width: 2.2;
  stroke-dasharray: 100;
  stroke-dashoffset: calc(100 - var(--prog, 0));
  transition: stroke-dashoffset 720ms cubic-bezier(0.16, 1, 0.3, 1);
}

.depth__stages {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
}

.dstage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 0 var(--space-2) var(--space-4);
  margin-top: calc(var(--d) * 40px);
  text-align: center;
  color: var(--color-text-60);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), transform 320ms cubic-bezier(0.16, 1, 0.3, 1);
}

.dstage:hover { transform: translateY(-3px); }

.dstage__dot {
  width: 16px;
  height: 16px;
  margin-bottom: var(--space-3);
  border-radius: 50%;
  border: 2px solid var(--color-border-strong);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), background var(--transition-fast),
              box-shadow var(--transition-fast), transform var(--transition-fast);
}

.dstage__lvl {
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-40);
}

.dstage__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.2;
  color: var(--color-text-80);
  transition: color var(--transition-fast);
}

.dstage__hint { font-size: 0.75rem; color: var(--color-text-40); }

.dstage.is-active .dstage__dot {
  border-color: var(--color-teal);
  background: var(--color-teal);
  box-shadow: 0 0 0 6px var(--tint-teal-15);
  transform: scale(1.12);
}

.dstage.is-active .dstage__name { color: var(--color-heading); }
.dstage.is-active .dstage__lvl { color: var(--color-teal); }
.dstage:hover .dstage__dot { border-color: var(--color-teal); }

/* Панель уровня */
.depth__panels { position: relative; }

.dpanel {
  display: none;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-lg);
}

.dpanel.is-active { display: block; animation: dpanelIn 520ms cubic-bezier(0.16, 1, 0.3, 1); }

@keyframes dpanelIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.dpanel__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.dpanel__badge {
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--tint-teal-15);
  color: var(--color-teal);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.dpanel__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 1rem + 0.9vw, 1.7rem);
  line-height: 1.16;
  color: var(--color-heading);
}

.dpanel__lead {
  margin: 0 0 var(--space-6);
  max-width: 48rem;
  font-size: var(--text-base);
  line-height: 1.68;
  color: var(--color-text-80);
}

.dpanel__steps {
  margin: 0 0 var(--space-6);
  padding: 0;
  list-style: none;
  counter-reset: st;
  display: grid;
  gap: var(--space-3);
}

.dpanel__steps li {
  position: relative;
  counter-increment: st;
  padding: var(--space-3) var(--space-4) var(--space-3) 3rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-glass);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-text-60);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.dpanel__steps li:hover { border-color: var(--color-border-strong); background: var(--color-surface-glass-hover); }

.dpanel__steps li::before {
  content: counter(st);
  position: absolute;
  left: var(--space-4);
  top: var(--space-3);
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-teal);
}

.dpanel__steps b { color: var(--color-heading); font-weight: 600; }

.dpanel__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-8);
}

.dpanel__cols--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.dpanel__cols h4 {
  margin: 0 0 var(--space-3);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.dpanel__cols ul { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--space-2); }

.dpanel__cols li {
  position: relative;
  padding-left: 1.1rem;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-80);
}

.dpanel__cols li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-purple);
}

.dpanel__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.dpanel__meta { font-size: 0.8125rem; color: var(--color-text-40); }

.dpanel__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9375rem;
  color: var(--color-teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.dpanel__cta:hover { border-bottom-color: var(--color-teal); }
.dpanel__cta i { transition: transform var(--transition-fast); }
.dpanel__cta:hover i { transform: translateX(3px); }

@media (max-width: 900px) {
  .depth__line { display: none; }
  .depth__stages {
    grid-template-columns: 1fr;
    gap: 0;
    padding-left: var(--space-6);
    border-left: 1px dashed var(--color-border-strong);
  }
  .dstage {
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
    margin-top: 0;
    padding: var(--space-3) var(--space-2);
    text-align: left;
    flex-wrap: wrap;
  }
  .dstage__dot { margin: 0 0 0 calc(-1 * var(--space-6) - 8.5px); }
  .dstage__lvl { order: 3; width: 100%; }
  .depth__rail { margin-bottom: var(--space-8); }
  .dpanel { padding: var(--space-6); }
  .dpanel__cols, .dpanel__cols--3 { grid-template-columns: 1fr; gap: var(--space-6); }
}

/* ============================================================
   4. ЦИФРЫ И ФАКТЫ
   ============================================================ */

.about {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
}

.about__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: var(--space-12);
  align-items: center;
}

.about__photo {
  position: relative;
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
}

.about__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 3;
  object-fit: cover;
}

.about__img--light { display: none; }
[data-theme='light'] .about__img--dark { display: none; }
[data-theme='light'] .about__img--light { display: block; }

.about__photo figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-8) var(--space-5) var(--space-4);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.62));
}

.about__lead {
  margin: var(--space-6) 0 var(--space-8);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-80);
  max-width: 34rem;
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  margin: 0 0 var(--space-8);
  padding: 0;
  list-style: none;
}

.fact {
  padding: var(--space-4) var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-glass);
  transition: border-color var(--transition-fast), transform 340ms cubic-bezier(0.16, 1, 0.3, 1);
}

.fact:hover { border-color: var(--color-border-strong); transform: translateY(-4px); }

.fact b {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 1.2rem + 1.1vw, 2.2rem);
  line-height: 1;
  background: var(--gradient-accent-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme='light'] .fact b {
  background: linear-gradient(90deg, #5a38a8, #076b79);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.fact span {
  display: block;
  margin-top: var(--space-2);
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--color-text-60);
}

.roles { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--space-3); }

.roles li {
  position: relative;
  padding-left: 1.25rem;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-60);
}

.roles li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--color-teal);
}

.roles span { color: var(--color-heading); font-weight: 600; }

@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .about__photo { max-width: 22rem; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ============================================================
   5. КЕЙСЫ
   ============================================================ */

.cases {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
}

.tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.tile {
  position: relative;
  display: block;
  min-height: 19rem;
  padding: 1px;
  border-radius: var(--radius-xl);
  text-decoration: none;
  overflow: hidden;
  isolation: isolate;
  background: var(--color-border-md);
  transition: transform 480ms cubic-bezier(0.16, 1, 0.3, 1);
}

.tile:hover { transform: translateY(-7px); }

/* переливающаяся рамка следует за курсором */
.tile__bg {
  position: absolute;
  inset: -40%;
  z-index: 0;
  opacity: 0;
  background: conic-gradient(from calc(var(--ang, 0) * 1deg),
    var(--color-teal), var(--color-purple), var(--color-teal));
  transition: opacity 420ms ease;
  animation: tileSpin 9s linear infinite paused;
}

.tile:hover .tile__bg { opacity: 1; animation-play-state: running; }

@keyframes tileSpin { to { transform: rotate(360deg); } }

.tile__body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  height: 100%;
  padding: var(--space-6);
  border-radius: calc(var(--radius-xl) - 1px);
  background: var(--color-bg-card);
}

/* световое пятно под курсором */
.tile__body::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%),
    var(--tint-teal-15), transparent 62%);
  transition: opacity 420ms ease;
  pointer-events: none;
}

.tile:hover .tile__body::before { opacity: 1; }

.tile__tag {
  font-size: 0.6875rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.tile__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.1875rem;
  line-height: 1.24;
  color: var(--color-heading);
  text-wrap: pretty;
}

.tile__desc {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-60);
}

.tile__foot {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: var(--space-5);
  font-size: 0.8125rem;
  color: var(--color-text-40);
  transition: color var(--transition-fast);
}

.tile:hover .tile__foot { color: var(--color-teal); }
.tile__foot i { transition: transform var(--transition-fast); }
.tile:hover .tile__foot i { transform: translateX(4px); }

@media (max-width: 1000px) { .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 680px) {
  .tiles { grid-template-columns: 1fr; gap: var(--space-4); }
  .tile { min-height: 0; }
}

/* ============================================================
   6. ТРИ УРОВНЯ И МИССИЯ
   ============================================================ */

.levels {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
}

.levels__stack {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-12);
}

.lvl {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  text-align: left;
  overflow: hidden;
  transition: border-color var(--transition-fast), transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
}

.lvl::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-brand, linear-gradient(180deg, var(--color-purple), var(--color-teal)));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 560ms cubic-bezier(0.16, 1, 0.3, 1);
}

.lvl.is-active::before, .lvl:hover::before { transform: scaleY(1); }
.lvl:hover { transform: translateY(-5px); border-color: var(--color-border-strong); }
.lvl.is-active { border-color: var(--color-border-strong); background: var(--color-surface-glass-hover); }

.lvl__idx {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--color-text-40);
}

.lvl__scope {
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.lvl__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.375rem;
  line-height: 1.15;
  color: var(--color-heading);
}

.lvl__text {
  font-size: var(--text-sm);
  line-height: 1.62;
  color: var(--color-text-60);
}

.lvl__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: var(--space-5);
}

.lvl__tags i {
  font-style: normal;
  padding: 0.18rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: var(--color-text-60);
}

.lvl.is-active .lvl__tags i { border-color: var(--color-border-strong); color: var(--color-text-80); }

@media (max-width: 900px) { .levels__stack { grid-template-columns: 1fr; } }

/* Миссия */
.mission {
  position: relative;
  padding: var(--space-12) var(--space-10);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  overflow: hidden;
  text-align: center;
}

.mission__glow {
  position: absolute;
  inset: -30% -10% auto;
  height: 140%;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, var(--tint-teal-15), transparent 70%);
  pointer-events: none;
}

.mission__kicker {
  position: relative;
  margin: 0 0 var(--space-5);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.mission__text {
  position: relative;
  margin: 0 auto var(--space-10);
  max-width: 46rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.05rem, 0.9rem + 0.7vw, 1.4rem);
  line-height: 1.5;
  color: var(--color-text-80);
  text-wrap: pretty;
}

.mission__text b { color: var(--color-heading); font-weight: 600; }

.mission__unions {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  text-align: left;
}

.mu {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-glass);
  text-decoration: none;
  transition: border-color var(--transition-fast), transform 320ms cubic-bezier(0.16, 1, 0.3, 1);
}

.mu:hover { border-color: var(--color-teal); transform: translateY(-4px); }

.mu b {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--color-heading);
}

.mu span {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.78125rem;
  line-height: 1.42;
  color: var(--color-text-60);
}

@media (max-width: 900px) {
  .mission { padding: var(--space-8) var(--space-5); }
  .mission__unions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 520px) { .mission__unions { grid-template-columns: 1fr; } }

/* ============================================================
   7. МАТЕРИАЛЫ — неравномерная плитка
   ============================================================ */

.materials {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
}

.mosaic {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: 12.5rem;
  gap: var(--space-4);
}

.mitem {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  text-decoration: none;
  overflow: hidden;
  transition: border-color var(--transition-fast), transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.mitem::after {
  content: '';
  position: absolute;
  inset: auto -20% -60% -20%;
  height: 100%;
  background: radial-gradient(ellipse 50% 60% at 50% 100%, var(--tint-teal-15), transparent 70%);
  opacity: 0;
  transition: opacity 400ms ease;
  pointer-events: none;
}

.mitem:hover { transform: translateY(-5px); border-color: var(--color-border-strong); }
.mitem:hover::after { opacity: 1; }

/* Сетка 4×3 заполняется без дыр: 4 + 2 + 1 + 1 + 2 + 2 = 12 ячеек */
.mosaic > :nth-child(1) { grid-column: span 2; grid-row: span 2; }
.mosaic > :nth-child(2) { grid-column: span 2; }
.mosaic > :nth-child(5),
.mosaic > :nth-child(6) { grid-column: span 2; }

.mitem__type {
  font-size: 0.6875rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.mitem__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.24;
  color: var(--color-heading);
  text-wrap: pretty;
}

.mitem--lead .mitem__title { font-size: clamp(1.25rem, 1rem + 0.9vw, 1.7rem); }

.mitem__desc {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-60);
}

.mitem__meta {
  margin-top: auto;
  font-size: 0.75rem;
  color: var(--color-text-40);
}

@media (max-width: 1000px) {
  .mosaic { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-auto-rows: 11.5rem; }
  .mosaic > :nth-child(1) { grid-column: span 2; grid-row: span 1; min-height: 14rem; }
  .mosaic > :nth-child(2),
  .mosaic > :nth-child(5),
  .mosaic > :nth-child(6) { grid-column: span 2; }
}

@media (max-width: 600px) {
  .mosaic { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .mosaic > * { grid-column: span 1 !important; grid-row: span 1 !important; min-height: 0; }
}

/* ============================================================
   8. ВОПРОСЫ И ОТВЕТЫ
   ============================================================ */

.faq {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
}

.faq__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: var(--space-12);
  align-items: start;
}

.faq__aside .sec-note { margin-top: var(--space-5); }
.faq__list { display: grid; gap: var(--space-3); }

.qa {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  transition: border-color var(--transition-fast);
}

.qa[open] { border-color: var(--color-border-strong); }

.qa summary {
  position: relative;
  display: block;
  padding: var(--space-5) 3rem var(--space-5) var(--space-6);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.32;
  color: var(--color-heading);
}

.qa summary::-webkit-details-marker { display: none; }
.qa summary:hover { color: var(--color-teal); }

.qa summary::after {
  content: '';
  position: absolute;
  right: var(--space-6);
  top: calc(var(--space-5) + 0.42em);
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--color-teal);
  border-bottom: 2px solid var(--color-teal);
  transform: rotate(45deg);
  transition: transform 320ms cubic-bezier(0.16, 1, 0.3, 1);
}

.qa[open] summary::after { transform: rotate(225deg); }

.qa__body { padding: 0 var(--space-6) var(--space-6); }

.qa__body p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-80);
}

@media (max-width: 900px) { .faq__grid { grid-template-columns: 1fr; gap: var(--space-8); } }

/* ============================================================
   9. ЗАЯВКА
   ============================================================ */

.request {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
  background: radial-gradient(ellipse 110% 70% at 50% 100%, var(--color-hover-tint), transparent 70%);
}

.request__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--space-12);
  align-items: start;
}

.request__lead {
  margin: var(--space-6) 0 var(--space-6);
  font-size: var(--text-base);
  line-height: 1.68;
  color: var(--color-text-80);
}

.request__pros { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--space-3); }

.request__pros li {
  position: relative;
  padding-left: 1.6rem;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-text-60);
}

.request__pros li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--color-teal);
  border-bottom: 2px solid var(--color-teal);
  transform: rotate(-45deg);
}

.form {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-lg);
}

.form__row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }

.field { display: block; }

.field__label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.78125rem;
  letter-spacing: 0.04em;
  color: var(--color-text-60);
}

.field__label i { font-style: normal; color: var(--color-teal); }

.field__input {
  width: 100%;
  padding: 0.72rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.field__input::placeholder { color: var(--color-text-40); }

.field__input:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px var(--tint-teal-15);
}

.field__input--area { resize: vertical; min-height: 6.5rem; line-height: 1.55; }

select.field__input { appearance: none; cursor: pointer; }

.field__input.is-invalid { border-color: #e05555; }

.check {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.78125rem;
  line-height: 1.5;
  color: var(--color-text-60);
  cursor: pointer;
}

.check input { margin-top: 0.15rem; accent-color: var(--color-teal); width: 16px; height: 16px; flex: 0 0 auto; }
.check a { color: var(--color-teal); }

.form__submit { justify-self: start; margin-top: var(--space-2); }

.form__status { margin: 0; font-size: 0.8125rem; line-height: 1.5; color: var(--color-text-60); min-height: 1.2em; }
.form__status.is-ok { color: var(--color-teal); }
.form__status.is-err { color: #e05555; }


/* ============================================================
   ФОРМА БИТРИКС24 В БЛОКЕ ЗАЯВКИ
   ------------------------------------------------------------
   Своей плашки у нас нет: у формы Битрикс24 есть собственная
   подложка, и две рамки друг в друге выглядели бы задвоенно.
   Контейнер только задаёт ширину, положение и масштаб.

   Масштаб задаётся переменной --b24-zoom. Это работает даже
   если форма отрисована в изолированном дереве и наши правила
   внутрь не проникают.
   ============================================================ */

.b24-host {
  --b24-zoom: 0.9;
  zoom: var(--b24-zoom);
  width: 100%;
  max-width: 30rem;
  margin-left: auto;
  min-height: 300px;
}

/* Ниже — тонкая настройка на случай, если наши стили внутрь
   формы всё же проникают. Если нет — правила просто не сработают,
   вреда от них не будет. */

/* Снимаем внутренние подложки и тени, кроме кнопки */
.b24-host [class*="b24-form"]:not([class*="btn"]):not(input):not(textarea):not(select) {
  background: transparent !important;
  box-shadow: none !important;
  border-color: transparent !important;
}

/* Заголовок формы, копирайт и служебные подписи не нужны */
.b24-host .b24-form-header,
.b24-host .b24-form-header-title,
.b24-host .b24-form-header-description,
.b24-host .b24-form-copyright,
.b24-host .b24-form-sign { display: none !important; }

/* Сжимаем отступы */
.b24-host .b24-form-wrapper,
.b24-host .b24-form-content,
.b24-host .b24-form-padding-side { padding: 0 !important; margin: 0 !important; }

.b24-host .b24-form-field { margin-bottom: var(--space-3) !important; padding: 0 !important; }

.b24-host .b24-form-control-container,
.b24-host .b24-form-control-inner { padding: 0 !important; }

/* Поля: высота, размер текста и цвета из темы сайта */
.b24-host .b24-form-control,
.b24-host .b24-form-control-textarea,
.b24-host select.b24-form-control {
  min-height: 42px !important;
  padding: 0.5rem 0.8rem !important;
  font-size: 0.9375rem !important;
  line-height: 1.4 !important;
  border-radius: var(--radius-md) !important;
  background: var(--color-bg) !important;
  color: var(--color-text) !important;
  border: 1px solid var(--color-border-md) !important;
}

.b24-host .b24-form-control-textarea { min-height: 76px !important; }

.b24-host .b24-form-control:focus,
.b24-host .b24-form-control-textarea:focus {
  border-color: var(--color-teal) !important;
  outline: none !important;
}

.b24-host .b24-form-control::placeholder { color: var(--color-text-40) !important; }

.b24-host .b24-form-control-label,
.b24-host .b24-form-control-desc {
  font-size: 0.8125rem !important;
  line-height: 1.35 !important;
  color: var(--color-text-60) !important;
}

/* Блок согласия — самый мелкий текст */
.b24-host .b24-form-field-agreement,
.b24-host .b24-form-field-agreement * {
  font-size: 0.6875rem !important;
  line-height: 1.4 !important;
  color: var(--color-text-40) !important;
}

/* Кнопка в стиле сайта */
.b24-host .b24-form-btn-container { margin-top: var(--space-4) !important; padding: 0 !important; }

.b24-host .b24-form-btn {
  width: 100% !important;
  min-height: 46px !important;
  border-radius: var(--radius-full) !important;
  font-family: var(--font-display) !important;
  font-weight: 600 !important;
  font-size: 0.875rem !important;
  letter-spacing: 0.04em !important;
  text-transform: uppercase !important;
  background: var(--color-teal) !important;
  border-color: var(--color-teal) !important;
  color: #fff !important;
  transition: filter var(--transition-fast) !important;
}

.b24-host .b24-form-btn:hover { filter: brightness(1.12); }

.b24-host a { color: var(--color-teal) !important; }

@media (max-width: 900px) {
  .b24-host { --b24-zoom: 1; max-width: none; min-height: 0; }
}

@media (max-width: 900px) {
  .request__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .form { padding: var(--space-6); }
  .form__row { grid-template-columns: 1fr; }
}

/* ============================================================
   ПОДВАЛ
   ============================================================ */

.site-footer {
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-card);
}

.foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-border);
}

.foot__name {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-heading);
}

.foot__role { margin: 0; font-size: var(--text-sm); line-height: 1.6; color: var(--color-text-60); max-width: 22rem; }

.foot__col { display: flex; flex-direction: column; gap: var(--space-2); }

.foot__head {
  margin: 0 0 var(--space-2);
  font-size: 0.6875rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--color-text-40);
}

.foot__col a {
  font-size: 0.875rem;
  color: var(--color-text-60);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.foot__col a:hover { color: var(--color-teal); }

.foot__bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-6);
  text-align: center;
}

.foot__bottom p { margin: 0; font-size: 0.78125rem; color: var(--color-text-40); }
.foot__bottom a { color: var(--color-text-40); text-decoration: none; }
.foot__bottom a:hover { color: var(--color-teal); }


/* ---------- Подвал: TenChat под именем ---------- */

.foot__tenchat { margin: var(--space-4) 0 0; }

.foot__tenchat a {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-80);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-md);
  padding-bottom: 2px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.foot__tenchat a:hover {
  color: var(--color-teal);
  border-bottom-color: var(--color-teal);
}

/* ---------- Подвал: правовая колонка ---------- */

.foot__col--legal a { line-height: 1.45; }

.foot__legal-note {
  margin: var(--space-3) 0 0;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-text-40);
}

@media (max-width: 900px) {
  .foot__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-6); }
}
@media (max-width: 520px) { .foot__grid { grid-template-columns: 1fr; } }

/* ---------- Появление секций при прокрутке ---------- */

.reveal { opacity: 0; transform: translateY(22px); }
.reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 700ms ease, transform 760ms cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.is-in { opacity: 1; transform: none; transition: none; }
  .tile__bg { animation: none !important; }
}

/* ==========================================================================
   ЛЕНТА МАТЕРИАЛОВ  ·  общий вид для блоков «Кейсы» и «Материалы и события»
   Окно из четырёх карточек: крупная с картинкой, средняя и две малых.
   Без JS видны все карточки обычной сеткой (важно для поисковых роботов).
   ========================================================================== */

.rail { position: relative; }

.rail__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.rail.is-ready .rail__grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: minmax(11rem, auto) minmax(11rem, auto);
}

/* карточка */
.rcard {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 11rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-md);
  background: var(--color-bg-card);
  text-decoration: none;
  overflow: hidden;
  transition: border-color var(--transition-fast),
              transform 400ms cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 400ms ease;
}

.rcard::after {
  content: '';
  position: absolute;
  inset: auto -20% -60% -20%;
  height: 100%;
  background: radial-gradient(ellipse 50% 60% at 50% 100%, var(--tint-teal-15), transparent 70%);
  opacity: 0;
  transition: opacity 400ms ease;
  pointer-events: none;
}

.rcard:hover { transform: translateY(-5px); border-color: var(--color-border-strong); }
.rcard:hover::after { opacity: 1; }
.rcard:focus-visible { outline: 2px solid var(--color-teal); outline-offset: 3px; }

.rcard__body {
  position: relative;
  z-index: 1;
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
}

.rcard__type {
  font-size: 0.6875rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.rcard__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.24;
  color: var(--color-heading);
  text-wrap: pretty;
}

.rcard__desc {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-60);
}

.rcard__meta {
  margin-top: auto;
  padding-top: var(--space-3);
  font-size: 0.75rem;
  color: var(--color-text-40);
}

/* превью показывается только у крупной карточки */
.rcard__media { display: none; }

.rcard__media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--tint-purple-15), var(--tint-teal-15));
}

.rcard__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 600ms ease;
}

.rcard__img[src] { opacity: 1; }

/* ---- раскладка окна ---- */
.rail.is-ready .rcard { display: none; }

.rail.is-ready .is-lead,
.rail.is-ready .is-mid,
.rail.is-ready .is-s1,
.rail.is-ready .is-s2 { display: flex; }

.rail.is-ready .is-lead {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
}

.rail.is-ready .is-lead .rcard__media {
  display: block;
  flex: 1 1 auto;
  min-height: 8rem;
}

.rail.is-ready .is-lead.no-img .rcard__media {
  background: linear-gradient(135deg, var(--tint-purple-15), var(--tint-teal-15));
}

.rail.is-ready .is-lead .rcard__body { flex: 0 0 auto; }

.rail.is-ready .is-lead .rcard__title {
  font-size: clamp(1.25rem, 1rem + 0.9vw, 1.7rem);
}

.rail.is-ready .is-mid { grid-column: 3 / 5; grid-row: 1 / 2; }
.rail.is-ready .is-s1  { grid-column: 3 / 4; grid-row: 2 / 3; }
.rail.is-ready .is-s2  { grid-column: 4 / 5; grid-row: 2 / 3; }

/* у малых карточек описание убираем: остаётся тип, заголовок и подпись */
.rail.is-ready .is-s1 .rcard__desc,
.rail.is-ready .is-s2 .rcard__desc { display: none; }

/* появление при переключении */
.rail.is-ready .is-in {
  animation: railIn 460ms cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: var(--d, 0ms);
}

@keyframes railIn {
  from { opacity: 0; transform: translateY(14px) scale(0.985); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .rail.is-ready .is-in { animation: none; }
}

/* ---- переключатель страниц ---- */
.rail__nav {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.rail__pages {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.rail__arrow,
.rail__page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text-60);
  font-family: inherit;
  font-size: 0.8125rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast),
              background-color var(--transition-fast);
}

.rail__arrow { border-color: var(--color-border-md); }
.rail__arrow:hover:not([disabled]),
.rail__page:hover { color: var(--color-teal); border-color: var(--color-border-strong); }
.rail__arrow[disabled] { opacity: 0.3; cursor: default; }

.rail__page.is-active {
  color: var(--color-heading);
  border-color: var(--color-teal);
  background: var(--tint-teal-15);
}

.rail__gap {
  padding: 0 2px;
  color: var(--color-text-40);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

.rail__arrow:focus-visible,
.rail__page:focus-visible { outline: 2px solid var(--color-teal); outline-offset: 2px; }

/* ---- адаптив ---- */
@media (max-width: 1000px) {
  .rail.is-ready .rail__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto auto auto;
  }
  .rail.is-ready .is-lead { grid-column: 1 / 3; grid-row: 1 / 2; }
  .rail.is-ready .is-lead .rcard__media { min-height: 12rem; }
  .rail.is-ready .is-mid { grid-column: 1 / 3; grid-row: 2 / 3; }
  .rail.is-ready .is-s1  { grid-column: 1 / 2; grid-row: 3 / 4; }
  .rail.is-ready .is-s2  { grid-column: 2 / 3; grid-row: 3 / 4; }
}

@media (max-width: 600px) {
  .rail__grid { grid-template-columns: 1fr; }
  .rail.is-ready .rail__grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
  }
  .rail.is-ready .is-lead { grid-column: 1; grid-row: 1; }
  .rail.is-ready .is-mid  { grid-column: 1; grid-row: 2; }
  .rail.is-ready .is-s1   { grid-column: 1; grid-row: 3; }
  .rail.is-ready .is-s2   { grid-column: 1; grid-row: 4; }
  .rcard { min-height: 0; }
  .rcard__body { padding: var(--space-4); }
}

/* правая колонка заголовка секции: подпись и переключатель ленты */
.sec-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-4);
  max-width: 32rem;
}

.sec-aside .sec-note { margin: 0; text-align: right; }

@media (max-width: 900px) {
  .sec-aside { align-items: flex-start; }
  .sec-aside .sec-note { text-align: left; }
}

/* пока превью нет, вместо битой картинки остаётся мягкий градиент */
.rcard.no-img .rcard__img { display: none; }