/* AI tutor landing — layout tweaks on shared home-landing dark theme */

.ai-tutor-landing {
  position: relative;
  overflow-x: clip;
}

.ai-tutor-landing .home-landing__grid-bg {
  mask-image: linear-gradient(to bottom, black 0%, black 78%, transparent 100%);
}

/* --- Hero --- */
.ai-tutor-hero {
  padding-top: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: clamp(2rem, 5vw, 3rem);
}

body.landing-ai-tutor .landing-hero__media .home-hero-stage--ai {
  position: relative;
  z-index: 1;
  height: var(--home-hero-visual-h, 30.25rem);
  pointer-events: none;
}

.home-hero-stage--ai .home-hero-stage__workspace.ath-workspace {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-height: 0;
  padding: 0.55rem 0.7rem 0.35rem;
  overflow: hidden;
}

.home-hero-stage--ai .home-hero-stage__main {
  background: rgba(8, 12, 20, 0.35);
}

.ath-theory {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  transform: translate3d(0, 0, 0);
  transition: transform 0.5s ease;
}

.ath-theory.is-shift {
  transform: translate3d(0, -0.55rem, 0);
}

.ath-title {
  margin: 0 0 0.45rem;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.25;
  color: #f9fafb;
}

.ath-p {
  margin: 0 0 0.4rem;
  font-size: 0.68rem;
  line-height: 1.45;
  color: #c5cedb;
}

.ath-code {
  margin: 0.35rem 0 0;
  padding: 0.42rem 0.55rem;
  border-radius: 0.55rem;
  background: #2b2b2b;
  border: 1px solid rgba(148, 163, 184, 0.14);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.62rem;
  line-height: 1.45;
  color: #e8e8e8;
}

.ath-code .ace-kw {
  color: #cc7832;
}

.ath-code .ace-fn {
  color: #ffc66d;
}

.ath-tutor {
  flex-shrink: 0;
  z-index: 5;
  max-height: 0;
  margin: 0;
  overflow: hidden;
  border-radius: 0.85rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: max-height 0.75s ease, opacity 0.5s ease, margin 0.75s ease;
}

.ath-tutor.is-open {
  max-height: 13rem;
  margin: 0.35rem 0.05rem 0.1rem;
  opacity: 1;
  visibility: visible;
}

.ath-tutor .home-hero-stage__tutor {
  flex: none;
  max-height: 12.75rem;
  border-top: 0;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 0.85rem;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.32);
}

.ath-tutor .home-hero-stage__log {
  flex: 1 1 auto;
  max-height: 7.4rem;
  justify-content: flex-end;
  overflow-y: auto;
}

.ath-foot {
  display: flex;
  flex-shrink: 0;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  padding: 0.5rem 0.8rem 0.65rem;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  background: rgba(15, 23, 42, 0.45);
}

.ath-confused.is-pulse {
  animation: ath-confused-pulse 0.95s ease-in-out infinite;
}

.ath-confused.is-selected {
  border-color: rgba(248, 113, 113, 0.42);
  background: rgba(248, 113, 113, 0.12);
  color: #fecaca;
}

[data-ai-tutor-hero-demo]:not(.is-anim) .ath-confused.is-pulse,
[data-ai-tutor-hero-demo]:not(.is-anim) .ath-tutor,
[data-ai-tutor-hero-demo]:not(.is-anim) .ath-theory {
  animation-play-state: paused;
}

[data-ai-tutor-hero-demo]:not(.is-anim) .ath-tutor,
[data-ai-tutor-hero-demo]:not(.is-anim) .ath-theory {
  transition: none;
}

@keyframes ath-confused-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(248, 113, 113, 0);
    filter: brightness(1);
  }
  50% {
    box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.28);
    filter: brightness(1.08);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ath-confused.is-pulse {
    animation: none;
  }

  .ath-tutor,
  .ath-theory {
    transition: none;
  }
}

.ai-tutor-hero__actions .home-btn-primary,
.ai-tutor-hero__actions .home-btn-primary:hover,
.ai-tutor-hero__actions .home-btn-primary:focus,
.ai-tutor-hero__actions .home-btn-primary:focus-visible,
.ai-tutor-hero__actions .home-btn-ghost,
.ai-tutor-hero__actions .home-btn-ghost:hover,
.ai-tutor-hero__actions .home-btn-ghost:focus,
.ai-tutor-hero__actions .home-btn-ghost:focus-visible {
  text-decoration: none;
}

/* Desktop: deep-link to full lesson demo. Mobile CTA swaps in ≤767 block. */
.ai-tutor-hero__cta--mobile {
  display: none;
}

/* --- Benefits / flow grids --- */
.ai-tutor-landing .ai-tutor-flow {
  padding-top: clamp(1.1rem, 2.6vw, 1.85rem);
}

/* Sticky header eats native hash scroll — keep section titles visible. */
#ai-tutor-benefits,
#ai-tutor-flow,
#ai-tutor-demo {
  scroll-margin-top: calc(var(--header-height, 60px) + 1.25rem);
}

@media (max-width: 767.98px) {
  #ai-tutor-benefits,
  #ai-tutor-flow,
  #ai-tutor-demo {
    scroll-margin-top: calc(var(--header-height, 60px) + 0.85rem);
  }
}

.ai-tutor-benefits__grid.home-cards-grid,
.ai-tutor-flow__grid.home-compare {
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

@media (max-width: 767.98px) {
  .ai-tutor-landing .ai-tutor-flow {
    padding-top: clamp(0.85rem, 2.2vw, 1.25rem);
  }

  .ai-tutor-landing .ai-tutor-flow .home-section-title {
    margin-bottom: 0.85rem;
  }

  .ai-tutor-flow__grid.home-compare {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: 0.65rem;
    grid-template-columns: none;
    margin-top: 0;
    border: none;
    background: transparent;
    box-shadow: none;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 0.25rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 0.15rem 0.1rem 0.4rem;
    border-radius: 0;
  }

  .ai-tutor-flow__grid.home-compare::-webkit-scrollbar {
    display: none;
  }

  .ai-tutor-flow__grid.home-compare > .home-compare__col {
    flex: 0 0 min(78vw, 17.5rem);
    width: min(78vw, 17.5rem);
    max-width: min(78vw, 17.5rem);
    scroll-snap-align: start;
    border: 1px solid rgba(148, 163, 184, 0.16) !important;
    border-radius: 1.1rem;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 30%),
      linear-gradient(145deg, rgba(17, 24, 39, 0.96), rgba(10, 14, 20, 0.92));
    box-shadow:
      0 1px 0 rgba(255, 255, 255, 0.05) inset,
      0 12px 28px rgba(0, 0, 0, 0.24);
  }

  .ai-tutor-flow__grid.home-compare > .home-compare__col + .home-compare__col {
    border-top: 1px solid rgba(148, 163, 184, 0.16) !important;
  }

  .ai-tutor-landing .ai-tutor-benefits .home-section-sub {
    display: none;
  }

  .ai-tutor-landing .ai-tutor-benefits .home-section-title {
    margin-bottom: 0.85rem;
  }

  .ai-tutor-benefits__grid.home-cards-grid {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: 0.65rem;
    grid-template-columns: none;
    margin-top: 0;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 0.25rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 0.15rem 0.1rem 0.4rem;
  }

  .ai-tutor-benefits__grid.home-cards-grid::-webkit-scrollbar {
    display: none;
  }

  .ai-tutor-benefits__grid.home-cards-grid > .home-card {
    flex: 0 0 min(78vw, 17.5rem);
    width: min(78vw, 17.5rem);
    max-width: min(78vw, 17.5rem);
    scroll-snap-align: start;
    height: auto;
  }
}

@media (min-width: 992px) {
  .ai-tutor-flow__grid.home-compare {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.ai-tutor-flow__grid .home-compare__col > p:not(.muted) {
  margin: 0;
  color: var(--home-muted);
  line-height: 1.7;
}

/* --- Lesson screen demo (cabinet-like layout) --- */
.ai-tutor-demo-section {
  padding-top: clamp(2rem, 4vw, 3rem);
}

.ai-tutor-demo-section .home-container {
  max-width: min(1080px, 96vw);
}

.ai-tutor-lesson-demo {
  margin: clamp(1.25rem, 3vw, 2rem) auto 0;
}

.ai-tutor-lesson-demo__layout.career-question-detail__layout {
  gap: 1.15rem;
}

.ai-tutor-lesson-demo__sidebar.career-question-detail__sidebar {
  top: 1rem;
}

.ai-tutor-lesson-demo__nav.career-question-detail__question-nav {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.ai-tutor-lesson-demo__card {
  margin: 0;
}

.ai-tutor-lesson-demo__prose {
  margin-bottom: 1.15rem;
  font-size: 0.98rem;
  line-height: 1.65;
  color: #d7dfec;
}

.ai-tutor-lesson-demo__prose p {
  margin: 0 0 0.75rem;
}

.ai-tutor-lesson-demo__prose p:last-child {
  margin-bottom: 0;
}

.ai-tutor-lesson-demo__actions {
  margin-top: 0.15rem;
}

.ai-tutor-lesson-demo.is-layout-locked .ai-tutor-lesson-demo__tutor-slot {
  min-height: var(--demo-slot-h);
}

.ai-tutor-lesson-demo.is-layout-locked .career-question-detail__tutor-messages {
  min-height: var(--demo-messages-h);
  max-height: var(--demo-messages-h);
  overflow-y: auto;
}

.ai-tutor-lesson-demo.is-layout-locked .career-question-detail__tutor-typing {
  min-height: var(--demo-typing-h);
}

.ai-tutor-lesson-demo.is-layout-locked [data-demo-tutor-gap][hidden],
.ai-tutor-lesson-demo.is-layout-locked .career-question-detail__tutor-typing[hidden] {
  display: block !important;
  visibility: hidden;
  pointer-events: none;
}

.ai-tutor-lesson-demo.is-layout-locked .career-question-detail__tutor-typing[hidden] {
  display: inline-flex !important;
}

.ai-tutor-lesson-demo [data-demo-confused-btn] {
  cursor: pointer;
}

.ai-tutor-lesson-demo__confused-pulse {
  animation: ai-tutor-confused-pulse 0.85s ease-in-out 2;
}

@keyframes ai-tutor-confused-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(248, 113, 113, 0);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(248, 113, 113, 0.22);
    transform: scale(1.03);
  }
}

.ai-tutor-lesson-demo__tutor[hidden] {
  display: none !important;
}

.ai-tutor-lesson-demo__tutor.is-revealed {
  animation: ai-tutor-tutor-reveal 0.45s ease-out both;
}

@keyframes ai-tutor-tutor-reveal {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ai-tutor-lesson-demo [data-demo-tutor-gap][hidden] {
  display: none !important;
}

.ai-tutor-lesson-demo__tutor-form {
  pointer-events: none;
}

.ai-tutor-lesson-demo__input-wrap .career-question-detail__tutor-input.ai-tutor-lesson-demo__fake-input {
  display: flex;
  align-items: center;
  min-height: 3rem;
  padding-right: 3.25rem;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: hidden;
}

.ai-tutor-lesson-demo__input-wrap .career-question-detail__tutor-send.is-active {
  transform: translateY(calc(-50% - 4px)) scale(1.06);
  filter: brightness(1.1);
}

.ai-tutor-lesson-demo__msg-enter {
  animation: ai-tutor-msg-enter 0.35s ease-out both;
}

@keyframes ai-tutor-msg-enter {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .ai-tutor-lesson-demo__layout.career-question-detail__layout {
    grid-template-columns: 1fr;
  }

  .ai-tutor-lesson-demo__sidebar.career-question-detail__sidebar {
    position: static;
  }

  .ai-tutor-lesson-demo__nav.career-question-detail__question-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-tutor-lesson-demo__confused-pulse,
  .ai-tutor-lesson-demo__tutor.is-revealed,
  .ai-tutor-lesson-demo__msg-enter {
    animation: none;
  }
}

/* --- CTA --- */
.ai-tutor-landing .ai-tutor-cta {
  padding-top: clamp(1.1rem, 2.6vw, 1.85rem);
}

.ai-tutor-cta__strip {
  text-align: center;
}

.ai-tutor-cta__actions {
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.ai-tutor-cta__actions .home-btn-primary,
.ai-tutor-cta__actions .home-btn-primary:hover,
.ai-tutor-cta__actions .home-btn-ghost,
.ai-tutor-cta__actions .home-btn-ghost:hover {
  text-decoration: none;
}

@media (max-width: 767.98px) {
  /*
    Full lesson-demo (plan sidebar + chat) is too tall on phones and duplicates
    the compact hero mock — keep hero media, drop the section.
  */
  body.landing-ai-tutor .ai-tutor-demo-section {
    display: none;
  }

  body.landing-ai-tutor .ai-tutor-hero__cta--demo {
    display: none;
  }

  body.landing-ai-tutor .ai-tutor-hero__cta--mobile {
    display: inline-flex;
  }

  .ai-tutor-cta__actions {
    flex-direction: column;
    align-items: stretch;
    max-width: 18rem;
    margin-left: auto;
    margin-right: auto;
  }

  .ai-tutor-cta__actions .home-btn-primary,
  .ai-tutor-cta__actions .home-btn-ghost {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}