/*
 * ═══════════════════════════════════════════════════
 *  TaxiToLearn — Project Page Layout (airport.html)
 *  Value props, scenario, tech stack, timeline.
 * ═══════════════════════════════════════════════════
 */

/* ── Project Hero ───────────────────────────────── */
.project-hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  overflow: hidden;
  padding-top: calc(var(--nav-height) + var(--space-20));
  padding-bottom: var(--space-20);
  border-bottom: 1px solid var(--border-subtle);
}

/* Hero background — photo with dark overlay for readability */
.project-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../../assets/images/plane_stand.jpg');
  background-size: cover;
  background-position: center 65%;
  z-index: 0;
}

/* Dark semi-transparent overlay so text stays legible */
.project-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(4, 8, 16, 0.45);
  pointer-events: none;
  z-index: 0;
}

.project-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.project-hero__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-0);
}

.project-hero__status {
  display: inline-flex;
  align-items: center;
  font-size: 0.67rem;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--brand-12);
  color: var(--brand);
  border: 1px solid var(--brand-20);
  white-space: nowrap;
}

.project-hero__title {
  font-size: clamp(var(--font-size-3xl), 6vw, var(--font-size-5xl));
  font-weight: var(--font-bold);
  color: var(--text-0);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-6);
}

.project-hero__title span {
  color: var(--brand);
}

.project-hero__sub {
  font-size: clamp(var(--font-size-md), 1.8vw, var(--font-size-lg));
  color: var(--text-0);
  font-weight: var(--font-light);
  line-height: var(--leading-loose);
  max-width: 640px;
  margin-bottom: var(--space-10);
}

.project-hero__cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Value cards ─────────────────────────────────── */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-16);
}

.value-card {
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition:
    border-color var(--ease-default),
    background var(--ease-default),
    transform var(--ease-spring);
}

.value-card:hover {
  border-color: var(--brand-40);
  background: var(--surface-overlay);
  transform: translateY(-3px);
}

/* ── Airport screenshot showcase ──────────────────– */
.airport-screenshot__intro {
  font-size: var(--font-size-xl);
  text-align: center;
  max-width: 640px;
  margin: var(--space-12) auto var(--space-8);
}

.airport-screenshot__intro .t-accent {
  font-size: 1.15em;
}

.airport-screenshot {
  margin-top: var(--space-20);
  text-align: center;
  width: 100%;
}

.airport-screenshot .sim-placeholder {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

.airport-screenshot .sim-placeholder .sim-placeholder__img {
  height: auto;
  object-fit: fill;
}

.airport-screenshot__caption {
  margin-top: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--text-2);
  font-style: italic;
}

.value-card__icon {
  width: 46px;
  height: 46px;
  background: var(--brand-12);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.value-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--brand);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.value-card__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-semibold);
  color: var(--text-0);
  margin-bottom: var(--space-3);
}

.value-card__body {
  font-size: var(--font-size-sm);
  color: var(--text-3);
  line-height: var(--leading-relaxed);
}

/* ── Tech stack ──────────────────────────────────── */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-16);
}

.tech-card {
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition:
    border-color var(--ease-default),
    transform var(--ease-spring);
}

.tech-card:hover {
  border-color: var(--brand-40);
  transform: translateY(-3px);
}

.tech-card__cat {
  font-size: 0.67rem;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--brand);
  opacity: 0.75;
  margin-bottom: var(--space-3);
}

.tech-card__icon {
  font-family: var(--font-mono);
  font-size: var(--font-size-xl);
  color: var(--brand);
  letter-spacing: -1px;
  margin-bottom: var(--space-3);
  line-height: 1;
}

.tech-card__name {
  font-size: var(--font-size-md);
  font-weight: var(--font-semibold);
  color: var(--text-0);
  margin-bottom: var(--space-2);
}

.tech-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-3);
  line-height: var(--leading-snug);
}

/* ── Scenario section ────────────────────────────── */
.lebl-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  margin-top: var(--space-12);
}

.lebl-map {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.lebl-text {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.lebl-text .section-desc {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-8);
  margin-left: auto;
  margin-right: auto;
}

.lebl-text .section-desc .t-accent {
  font-size: 1.15em;
}

.lebl-positions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-8);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.pos-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color var(--ease-default);
  text-align: left;
}

.pos-item:hover {
  border-color: var(--brand-40);
}

.pos-badge {
  flex-shrink: 0;
  font-size: 0.65rem;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--surface-base);
  background: var(--brand);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.pos-item p {
  font-size: var(--font-size-sm);
  color: var(--text-3);
  line-height: var(--leading-snug);
}

.pos-item strong {
  color: var(--text-1);
  font-weight: var(--font-semibold);
}

/* ── Roadmap / Timeline (S-curve alternating) ────── */
.roadmap-timeline {
  position: relative;
  margin-top: var(--space-16);
}

/* Center vertical spine */
.roadmap-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: var(--border-subtle);
  z-index: 0;
}

.roadmap-item {
  display: grid;
  grid-template-columns: 1fr 3rem 1fr;
  align-items: start;
  margin-bottom: var(--space-10);
}

.roadmap-item:last-child {
  margin-bottom: 0;
}

/* Dot — always in center column */
.roadmap-item__dot {
  grid-column: 2;
  grid-row: 1;
  justify-self: center;
  position: relative;
  z-index: 1;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--status-active);
  background: var(--surface-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: var(--font-bold);
  color: var(--brand);
  margin-top: 4px;
}

.roadmap-item__dot--done {
  background: var(--status-done);
  border-color: var(--status-done);
  color: var(--surface-base);
}

.roadmap-item__dot--active {
  background: var(--brand-12);
  box-shadow: 0 0 0 6px var(--brand-05);
}

.roadmap-item__dot--future {
  border-color: var(--status-future);
  color: var(--status-future);
}

/* Content wrapper */
.roadmap-item__content {
  padding-bottom: var(--space-4);
}

/* Odd items → content on LEFT, right-aligned text */
.roadmap-item:nth-child(odd) .roadmap-item__content {
  grid-column: 1;
  grid-row: 1;
  padding-right: var(--space-8);
  text-align: right;
}

/* Even items → content on RIGHT, left-aligned text */
.roadmap-item:nth-child(even) .roadmap-item__content {
  grid-column: 3;
  grid-row: 1;
  padding-left: var(--space-8);
}

.roadmap-item__meta {
  font-size: var(--font-size-xs);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: var(--space-2);
}

.roadmap-item__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-semibold);
  color: var(--text-0);
  margin-bottom: var(--space-3);
}

.roadmap-item__body {
  font-size: var(--font-size-sm);
  color: var(--text-3);
  line-height: var(--leading-relaxed);
}

/* ── Hero 2-column layout ────────────────────────── */
.project-hero__layout {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: var(--space-8);
}

.project-hero__text {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 800px;
}

.project-hero__sub {
  color: var(--text-0);
}

.project-hero__highlight {
  color: var(--text-0);
  font-weight: var(--font-semibold);
}

/* ── Simulator placeholder (hero + scenario) ─────── */
.sim-placeholder {
  width: 100%;
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-hero__media .sim-placeholder {
  aspect-ratio: 16 / 10;
}

.sim-placeholder__bar {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 10px 14px;
  background: var(--surface-overlay);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.sim-placeholder__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-default);
}

.sim-placeholder__screen {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  color: var(--text-3);
  font-size: var(--font-size-sm);
  font-style: italic;
  min-height: 140px;
}

.sim-placeholder__img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* ── Expandable pos-items (details/summary) ──────── */
details.pos-item {
  cursor: pointer;
}

details.pos-item summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  position: relative;
  padding-right: var(--space-8);
}

details.pos-item summary::after {
  content: '';
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: translateY(-50%) rotate(45deg);
  transition: transform var(--ease-default);
}

details.pos-item[open] summary::after {
  transform: translateY(-25%) rotate(-135deg);
}

details.pos-item summary::-webkit-details-marker {
  display: none;
}

details.pos-item summary::marker {
  display: none;
}

details.pos-item[open] {
  border-color: var(--brand-40);
}

.pos-item__example {
  margin-top: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--surface-overlay);
  border-radius: var(--radius-md);
  border-left: 2px solid var(--brand-40);
}

.pos-item__example-label {
  display: block;
  font-size: 0.67rem;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--brand);
  opacity: 0.75;
  margin-bottom: var(--space-2);
}

.pos-item__example-text {
  font-size: var(--font-size-sm);
  color: var(--text-2);
  font-family: var(--font-mono);
  line-height: var(--leading-relaxed);
}

.pos-item__example-text + .pos-item__example-text {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

.pos-item__speaker {
  font-size: 0.6rem;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--brand);
  opacity: 0.9;
  margin-right: var(--space-2);
  font-family: var(--font-sans);
}

.pos-item__speaker--agent {
  color: var(--text-muted);
}

.pos-item__ai-badge {
  display: block;
  font-size: 0.7rem;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--brand);
  background: color-mix(in srgb, var(--brand) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--brand) 30%, transparent);
  border-radius: 4px;
  padding: var(--space-1) var(--space-3);
  margin-bottom: var(--space-2);
  font-family: var(--font-sans);
  width: fit-content;
}

/* ── Quick Start code block ──────────────────────── */
.code-block {
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 560px;
  margin-top: var(--space-8);
}

.code-block__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--surface-overlay);
}

.code-block__label {
  font-size: 0.67rem;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-3);
}

.code-block__copy {
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-3);
  font-size: var(--font-size-xs);
  font-family: var(--font-sans);
  padding: 0.2rem 0.65rem;
  cursor: pointer;
  transition: border-color var(--ease-default), color var(--ease-default);
}

.code-block__copy:hover {
  border-color: var(--brand-40);
  color: var(--brand);
}

.code-block__pre {
  padding: var(--space-6);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--text-1);
  line-height: var(--leading-relaxed);
  overflow-x: auto;
}

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 960px) {
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-hero__layout {
    grid-template-columns: 1fr;
  }

  .project-hero__media {
    display: none;
  }
}

@media (max-width: 768px) {
  .value-grid {
    grid-template-columns: 1fr;
  }

  .lebl-grid {
    grid-template-columns: 1fr;
  }

  .lebl-positions {
    grid-template-columns: 1fr;
  }

  .airport-screenshot {
    margin-top: var(--space-12);
  }

  /* Collapse S-curve to left-aligned single column */
  .roadmap-timeline::before {
    left: 14px;
    transform: none;
  }

  .roadmap-item {
    grid-template-columns: 28px 1fr;
  }

  .roadmap-item__dot,
  .roadmap-item:nth-child(odd) .roadmap-item__dot,
  .roadmap-item:nth-child(even) .roadmap-item__dot {
    grid-column: 1;
  }

  .roadmap-item__content,
  .roadmap-item:nth-child(odd) .roadmap-item__content,
  .roadmap-item:nth-child(even) .roadmap-item__content {
    grid-column: 2;
    padding-left: var(--space-5);
    padding-right: 0;
    text-align: left;
  }
}

@media (max-width: 480px) {
  .tech-grid {
    grid-template-columns: 1fr;
  }
}