/* Timeline-spine layout — «Дорожная ось» */

.dor-frame {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.dor-main {
  flex: 1;
}

/* —— Hero —— */
.dor-hero {
  position: relative;
  min-height: calc(100vh - var(--dor-nav-h));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--dor-space-xl) var(--dor-space-md);
  overflow: hidden;
  background: var(--dor-night);
  color: var(--dor-fog);
}

.dor-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.dor-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.dor-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      165deg,
      rgba(15, 31, 46, 0.88) 0%,
      rgba(15, 31, 46, 0.72) 42%,
      rgba(44, 62, 74, 0.55) 70%,
      rgba(196, 120, 42, 0.45) 100%
    );
  pointer-events: none;
}

.dor-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 48px,
      rgba(255, 255, 255, 0.03) 48px,
      rgba(255, 255, 255, 0.03) 50px
    );
  pointer-events: none;
  animation: dor-road-drift 40s linear infinite;
}

@keyframes dor-road-drift {
  from { transform: translateX(0); }
  to { transform: translateX(-50px); }
}

.dor-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 36rem;
}

.dor-hero__brand {
  font-family: var(--dor-font-display);
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 var(--dor-space-md);
  color: #fff;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
  animation: dor-fade-up 0.9s var(--dor-ease) both;
}

.dor-hero__lead {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: rgba(232, 238, 242, 0.88);
  margin: 0 0 var(--dor-space-lg);
  animation: dor-fade-up 0.9s var(--dor-ease) 0.15s both;
}

.dor-hero .dor-amber-cta {
  animation: dor-fade-up 0.9s var(--dor-ease) 0.3s both;
}

@keyframes dor-fade-up {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* —— CTA —— */
.dor-amber-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  background: var(--dor-amber);
  color: var(--dor-night);
  font-family: var(--dor-font-display);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s var(--dor-ease), transform 0.25s var(--dor-ease);
}

.dor-amber-cta:hover {
  background: #f0b530;
  color: var(--dor-night);
  transform: translateY(-2px);
}

.dor-amber-cta--ghost {
  background: transparent;
  color: var(--dor-amber);
  box-shadow: inset 0 0 0 2px var(--dor-amber);
}

.dor-amber-cta--ghost:hover {
  background: var(--dor-amber);
  color: var(--dor-night);
}

/* —— Page intro (non-home) —— */
.dor-page-intro {
  position: relative;
  background: var(--dor-night);
  color: var(--dor-fog);
  padding: var(--dor-space-xl) var(--dor-space-md) var(--dor-space-lg);
  text-align: center;
  overflow: hidden;
  min-height: 14rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.dor-page-intro__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.dor-page-intro__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.45;
}

.dor-page-intro__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 31, 46, 0.75), rgba(15, 31, 46, 0.92));
}

.dor-page-intro > *:not(.dor-page-intro__bg) {
  position: relative;
  z-index: 1;
}

.dor-page-intro__icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--dor-space-md);
}

.dor-page-intro__icon img {
  width: 100%;
  height: 100%;
}

.dor-page-intro h1 {
  color: #fff;
}

.dor-page-intro p {
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
  color: rgba(232, 238, 242, 0.8);
}

/* —— Spine —— */
.dor-spine {
  position: relative;
  max-width: var(--dor-max);
  margin: 0 auto;
  padding: var(--dor-space-2xl) var(--dor-space-md);
}

.dor-spine::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: var(--dor-spine-w);
  margin-left: calc(var(--dor-spine-w) / -2);
  background: linear-gradient(
    180deg,
    transparent,
    var(--dor-road) 8%,
    var(--dor-road) 92%,
    transparent
  );
  border-radius: 2px;
  z-index: 0;
}

.dor-spine__progress {
  position: absolute;
  top: 0;
  left: 50%;
  width: var(--dor-spine-w);
  margin-left: calc(var(--dor-spine-w) / -2);
  height: 0;
  background: var(--dor-amber);
  border-radius: 2px;
  z-index: 1;
  transition: height 0.15s linear;
  pointer-events: none;
}

.dor-node-left,
.dor-node-right {
  position: relative;
  width: calc(50% - 2.5rem);
  margin-bottom: var(--dor-space-xl);
  padding: var(--dor-space-lg);
  opacity: 1;
  transform: none;
  transition:
    opacity 0.55s var(--dor-ease),
    transform 0.55s var(--dor-ease);
  z-index: 2;
  text-align: left;
}

.dor-spine.is-enhanced .dor-node-left,
.dor-spine.is-enhanced .dor-node-right {
  opacity: 0.42;
  transform: translateY(1.25rem);
}

.dor-spine.is-enhanced .dor-node-left.is-active,
.dor-spine.is-enhanced .dor-node-right.is-active {
  opacity: 1;
  transform: translateY(0);
}

.dor-node-left {
  margin-right: auto;
}

.dor-node-right {
  margin-left: auto;
}

.dor-node__head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--dor-space-md);
}

.dor-node__head h2 {
  margin: 0;
}

.dor-node__icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
}

.dor-node__icon img {
  width: 100%;
  height: 100%;
  display: block;
}

.dor-node-left::after,
.dor-node-right::after {
  content: "";
  position: absolute;
  top: 1.75rem;
  width: 14px;
  height: 14px;
  background: var(--dor-fog);
  border: 3px solid var(--dor-road);
  border-radius: 50%;
  z-index: 3;
  transition: border-color 0.35s var(--dor-ease), background 0.35s var(--dor-ease);
}

.dor-node-left.is-active::after,
.dor-node-right.is-active::after {
  border-color: var(--dor-amber);
  background: var(--dor-amber);
  box-shadow: 0 0 0 4px rgba(232, 163, 23, 0.25);
}

.dor-node-left::after {
  right: -2.5rem;
  transform: translateX(50%);
}

.dor-node-right::after {
  left: -2.5rem;
  transform: translateX(-50%);
}

.dor-node-left h2,
.dor-node-right h2 {
  color: var(--dor-night);
}

.dor-node-left p,
.dor-node-right p,
.dor-node-left li,
.dor-node-right li {
  color: var(--dor-steel);
}

.dor-node-left ul,
.dor-node-left ol,
.dor-node-right ul,
.dor-node-right ol {
  list-style-position: outside;
  padding-left: 1.25rem;
}

/* —— Media figure —— */
.dor-media {
  margin: var(--dor-space-md) 0 0;
  overflow: hidden;
  border-radius: 4px;
  background: var(--dor-night);
}

.dor-media img {
  width: 100%;
  height: auto;
  max-height: 220px;
  object-fit: cover;
  display: block;
}

.dor-media figcaption {
  padding: 0.55rem 0.85rem;
  font-size: 0.82rem;
  color: rgba(232, 238, 242, 0.75);
  background: rgba(0, 0, 0, 0.25);
}

.dor-sign-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--dor-space-md);
  align-items: center;
}

.dor-sign-row img {
  width: 4.5rem;
  height: 4.5rem;
  object-fit: contain;
  background: rgba(15, 31, 46, 0.06);
  padding: 0.35rem;
  border-radius: 4px;
}

/* —— Scheme board —— */
.dor-scheme-board {
  margin-top: var(--dor-space-md);
  background: var(--dor-night);
  border-radius: 4px;
  overflow: hidden;
  text-align: left;
  width: 100%;
}

.dor-scheme-board__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--dor-road);
}

.dor-scheme-board__tab {
  flex: 1;
  min-width: 6rem;
  padding: 0.7rem 1rem;
  font-family: var(--dor-font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--dor-steel);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.dor-scheme-board__tab:hover {
  color: var(--dor-fog);
}

.dor-scheme-board__tab.is-active {
  color: var(--dor-amber);
  border-bottom-color: var(--dor-amber);
  background: rgba(232, 163, 23, 0.08);
}

.dor-scheme-board__panel {
  display: none;
  padding: var(--dor-space-md);
}

.dor-scheme-board__panel.is-active {
  display: block;
  animation: dor-fade-up 0.4s var(--dor-ease) both;
}

.dor-scheme-board__panel svg,
.dor-scheme-board__panel img {
  margin: 0 auto;
  max-height: min(320px, 55vw);
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: contain;
  background: #0a1520;
  border-radius: 2px;
}

.dor-scheme-board__caption {
  margin: var(--dor-space-sm) 0 0;
  font-size: 0.9rem;
  color: rgba(232, 238, 242, 0.75);
  text-align: center;
}

/* —— Checklist (exam-prep) —— */
.dor-checklist {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

.dor-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid rgba(44, 62, 74, 0.15);
  color: var(--dor-road);
  cursor: pointer;
}

.dor-checklist input {
  margin-top: 0.3rem;
  accent-color: var(--dor-safe);
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
}

.dor-checklist li.is-done span {
  text-decoration: line-through;
  color: var(--dor-steel);
}

.dor-progress-bar {
  height: 6px;
  background: rgba(44, 62, 74, 0.15);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: var(--dor-space-md);
}

.dor-progress-bar__fill {
  height: 100%;
  width: 0%;
  background: var(--dor-safe);
  border-radius: 3px;
  transition: width 0.35s var(--dor-ease);
}

.dor-progress-label {
  font-size: 0.9rem;
  color: var(--dor-steel);
  margin-bottom: var(--dor-space-sm);
}

/* —— FAQ —— */
.dor-faq-list {
  max-width: 40rem;
  margin: 0 auto;
}

.dor-faq-item {
  border-bottom: 1px solid rgba(44, 62, 74, 0.18);
  padding: var(--dor-space-md) 0;
}

.dor-faq-item h3 {
  color: var(--dor-night);
  margin-bottom: var(--dor-space-xs);
}

.dor-faq-item p {
  margin: 0;
  color: var(--dor-steel);
}

.dor-faq-status {
  text-align: center;
  color: var(--dor-steel);
  padding: var(--dor-space-lg);
}

/* —— Privacy content —— */
.dor-prose {
  max-width: 40rem;
  margin: 0 auto;
  padding: var(--dor-space-xl) var(--dor-space-md);
}

.dor-prose h2 {
  margin-top: var(--dor-space-lg);
}

code {
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.9em;
  background: rgba(44, 62, 74, 0.1);
  padding: 0.1em 0.35em;
  border-radius: 2px;
}

/* —— Content helpers (not hero cards) —— */
.dor-tip {
  margin: var(--dor-space-md) 0 0;
  padding: var(--dor-space-sm) 0 var(--dor-space-sm) var(--dor-space-md);
  border-left: 3px solid var(--dor-amber);
  text-align: left;
}

.dor-tip p,
.dor-note p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--dor-steel);
}

.dor-tip strong,
.dor-note strong {
  color: var(--dor-night);
}

.dor-note {
  margin: var(--dor-space-md) 0 0;
  padding: var(--dor-space-sm) 0 var(--dor-space-sm) var(--dor-space-md);
  border-left: 3px solid var(--dor-safe);
  text-align: left;
}

.dor-node-left .dor-tip,
.dor-node-left .dor-note,
.dor-node-right .dor-tip,
.dor-node-right .dor-note {
  text-align: left;
}

.dor-kv {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--dor-space-md);
  text-align: left;
}

.dor-kv li {
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(44, 62, 74, 0.12);
  color: var(--dor-road);
}

.dor-kv strong {
  display: block;
  font-family: var(--dor-font-display);
  color: var(--dor-night);
  margin-bottom: 0.15rem;
}

/* —— Mobile: spine left —— */
@media (max-width: 768px) {
  .dor-spine {
    padding-left: 2.5rem;
  }

  .dor-spine::before,
  .dor-spine__progress {
    left: 1rem;
    margin-left: 0;
  }

  .dor-node-left,
  .dor-node-right {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    text-align: left;
  }

  .dor-node-left::after,
  .dor-node-right::after {
    left: -1.5rem;
    right: auto;
    transform: translateX(-50%);
  }

  .dor-node-left ul,
  .dor-node-left ol {
    list-style-position: outside;
  }

  .dor-hero {
    min-height: calc(100svh - var(--dor-nav-h));
  }
}