/*
 * landing.css — The Lab home / track landing
 * Reuses :root tokens from style.css
 */

/* ── Google Font (display title only) ─────────────────────────── */
/* Syne loaded via <link> in landing.html */

/* ── Body reset ───────────────────────────────────────────────── */
body {
  height: auto;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Top nav ──────────────────────────────────────────────────── */
.l-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 3.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.l-nav-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: opacity 0.2s;
}

.l-nav-brand:hover {
  opacity: 0.75;
}

.l-nav-logo {
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  object-fit: cover;
}

.l-nav-enter {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border: 1px solid rgba(255, 59, 59, 0.35);
  border-radius: 4px;
  transition: background 0.2s, border-color 0.2s;
}

.l-nav-enter:hover {
  background: rgba(255, 59, 59, 0.08);
  border-color: var(--accent);
}

.l-nav-arrow {
  transition: transform 0.25s ease;
  display: inline-block;
}

.l-nav-enter:hover .l-nav-arrow {
  transform: translateX(3px);
}

.l-nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.l-nav-courses-link {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.l-nav-courses-link:hover {
  color: var(--text);
}

/* ── Hero ─────────────────────────────────────────────────────── */
.l-hero {
  position: relative;
  padding: 5rem 1.5rem 5rem;
  overflow: hidden;
  /* Subtle engineering grid */
  background-image:
    linear-gradient(rgba(48, 54, 61, 0.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(48, 54, 61, 0.25) 1px, transparent 1px);
  background-size: 32px 32px;
  background-color: var(--bg);
}

/* Accent glow blob */
.l-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -5%;
  width: 55%;
  height: 110%;
  background: radial-gradient(ellipse at center, rgba(255, 59, 59, 0.055) 0%, transparent 68%);
  pointer-events: none;
}

.l-hero-inner {
  position: relative;
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  column-gap: 4rem;
  row-gap: 2.5rem;
  align-items: start;
}

/* ── Hero copy ────────────────────────────────────────────────── */
.l-copy-top {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.l-copy-bottom {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.l-eyebrow {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.38em;
  color: var(--muted);
  opacity: 0.6;
}

.l-title {
  font-family: 'Syne', var(--font);
  font-size: clamp(3.2rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--text);
  margin: 0;
}

.l-title-accent {
  color: var(--accent);
  display: inline;
}

.l-body {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  max-width: 38rem;
}

.l-body p {
  margin: 0;
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--muted);
}

/* ── CTAs ─────────────────────────────────────────────────────── */
.l-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  padding-top: 0.5rem;
}

.l-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.68rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.35em;
  color: var(--accent);
  text-decoration: none;
  transition: transform 0.3s ease;
}

.l-cta-primary:hover {
  transform: translateX(5px);
}

.l-cta-rule {
  width: 3.75rem;
  height: 2px;
  background: var(--accent);
  transition: width 0.45s ease;
  flex-shrink: 0;
}

.l-cta-primary:hover .l-cta-rule {
  width: 5.25rem;
}

.l-cta-secondary {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.l-cta-secondary:hover {
  color: var(--text);
}

/* ── Visual / Pipeline panel ──────────────────────────────────── */
.l-visual {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  position: relative;
}

/* Floating "Lab Status: Online" chip */
.l-status-chip {
  position: absolute;
  top: -1.75rem;
  right: -0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  z-index: 10;
  animation: chip-float 6s ease-in-out infinite;
}

.l-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3fb950;
  animation: status-pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

.l-status-text {
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
  white-space: nowrap;
}

/* Pipeline panel */
.pipeline-panel {
  position: relative;
  background: rgba(22, 27, 34, 0.6);
  border: 1px solid var(--border);
  border-radius: 2rem;
  padding: 2rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin: 0 auto;
}

/* Subtle inner glow */
.pipeline-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 40%, rgba(255, 59, 59, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.pipeline-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  display: block;
}

.pipeline-hint {
  position: absolute;
  bottom: 1.25rem;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--muted);
  opacity: 0.3;
  animation: hint-pulse 3s ease-in-out infinite;
}

/* ── Pipeline SVG elements ────────────────────────────────────── */
.pipe-edge {
  stroke: var(--border);
  stroke-width: 0.35;
  stroke-dasharray: 2 2.5;
  opacity: 0.25;
  transition: stroke 0.4s ease, opacity 0.4s ease, stroke-width 0.4s ease, stroke-dasharray 0.3s ease;
}

.pipe-edge--active {
  stroke: var(--accent);
  stroke-width: 0.9;
  stroke-dasharray: none;
  opacity: 0.65;
}

.pipe-node {
  cursor: pointer;
  animation: pipe-float 3.5s ease-in-out infinite;
}

.pipe-circle {
  fill: var(--bg);
  stroke: var(--node-color);
  stroke-width: 1.5;
  transition: fill 0.35s ease, filter 0.35s ease, r 0.25s ease;
}

.pipe-node--active .pipe-circle {
  fill: var(--node-color);
  filter: drop-shadow(0 0 6px var(--node-color));
}

.pipe-node--connected .pipe-circle {
  fill: rgba(255, 255, 255, 0.04);
  filter: drop-shadow(0 0 3px var(--node-color));
}

.pipe-label {
  font-family: var(--mono);
  font-size: 3.75px;
  font-weight: 700;
  text-anchor: middle;
  fill: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  opacity: 0.4;
  pointer-events: none;
  transition: fill 0.3s ease, opacity 0.3s ease;
}

.pipe-node--active .pipe-label,
.pipe-node--connected .pipe-label {
  fill: var(--text);
  opacity: 1;
}

/* ── Curriculum section ───────────────────────────────────────── */
.l-curriculum {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: 5rem 1.5rem 6rem;
}

.l-container {
  max-width: 1160px;
  margin: 0 auto;
}

.l-section-header {
  margin-bottom: 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.l-section-title {
  font-family: 'Syne', var(--font);
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.025em;
  margin: 0;
}

.l-section-sub {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.6;
  max-width: 44rem;
  margin: 0;
}

/* ── Phase cards ──────────────────────────────────────────────── */
.phase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.phase-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem 1.4rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

/* Colored left accent bar */
.phase-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--card-accent, var(--accent));
  opacity: 0;
  transition: opacity 0.25s ease;
  border-radius: 0.75rem 0 0 0.75rem;
}

.phase-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.phase-card:hover::before {
  opacity: 1;
}

.phase-card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}

.phase-number {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--card-accent, var(--accent));
  letter-spacing: -0.05em;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.phase-card:hover .phase-number {
  opacity: 1;
}

.phase-badge {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  white-space: nowrap;
}

.phase-card-title {
  font-family: 'Syne', var(--font);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
  line-height: 1.2;
}

.phase-card-desc {
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.55;
  margin: 0;
  flex-grow: 1;
}

.phase-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(48, 54, 61, 0.6);
  margin-top: auto;
}

.phase-weeks {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  opacity: 0.6;
  font-family: var(--mono);
}

.phase-cta-arrow {
  font-size: 0.9rem;
  color: var(--card-accent, var(--accent));
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.25s ease;
  display: inline-block;
}

.phase-card:hover .phase-cta-arrow {
  opacity: 1;
  transform: translateX(3px);
}

/* ── Animations ───────────────────────────────────────────────── */
@keyframes pipe-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-1.2px); }
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.88); }
}

@keyframes chip-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes hint-pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.12; }
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .phase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .l-hero-inner {
    grid-template-columns: 1fr;
    row-gap: 2.5rem;
  }

  /* Reset explicit grid placement so elements stack in DOM order:
     l-copy-top → l-visual → l-copy-bottom */
  .l-copy-top,
  .l-copy-bottom,
  .l-visual {
    grid-column: 1;
    grid-row: auto;
  }

  .l-visual {
    align-self: auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    max-width: 440px;
    margin: 0 auto;
    width: 100%;
  }

  /* Move chip out of absolute flow so it doesn't overflow */
  .l-status-chip {
    position: relative;
    top: auto;
    right: auto;
    align-self: flex-end;
  }

  .l-title {
    font-size: clamp(3rem, 11vw, 4.5rem);
  }
}

@media (max-width: 580px) {
  .l-hero {
    padding: 3.5rem 1.25rem 4rem;
  }

  .l-curriculum {
    padding: 3.5rem 1.25rem 4.5rem;
  }

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

  .l-nav {
    padding: 0 1.25rem;
  }

  /* Cap the pipeline panel height on small phones */
  .pipeline-panel {
    aspect-ratio: unset;
    height: 200px;
  }
}