/* ==========================================================================
   Landing Page — Hero search + track cards (Fluent 2)
   ========================================================================== */

/* ---------- Landing wrapper ---------- */
.landing-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-xxxl) var(--spacing-l);
  background: url('../assets/hero-bg.svg') center/cover no-repeat,
              var(--color-neutral-background-2);
  animation: landingFadeIn var(--duration-normal) var(--easing-ease-out);
}

@keyframes landingFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.landing-inner {
  max-width: 900px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xxl);
}

/* ---------- Hero Section (Fluent 2 typography) ---------- */
.landing-hero {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-l);
}

.landing-hero-title {
  font-size: var(--font-size-900);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-foreground-1);
  line-height: 52px;
  margin: 0;
  letter-spacing: -0.02em;
}

/* ---------- Hero Text Input with Lightbulb Icon ---------- */
.landing-hero-input-wrap {
  width: 100%;
  max-width: 600px;
  position: relative;
  display: flex;
  align-items: center;
}

.hero-input-icon {
  position: absolute;
  left: 14px;
  display: inline-flex;
  align-items: center;
  color: var(--color-neutral-foreground-3);
  pointer-events: none;
}

.landing-hero-input-wrap input {
  width: 100%;
  height: 44px;
  padding: 0 44px 0 42px;
  border-radius: var(--radius-medium);
  border: 1px solid var(--color-neutral-stroke-2);
  background: var(--color-neutral-background-1);
  color: var(--color-neutral-foreground-1);
  font-family: var(--font-family-base);
  font-size: var(--font-size-400);
  outline: none;
  transition: border-color var(--duration-fast);
  box-sizing: border-box;
}

.landing-hero-input-wrap input::placeholder {
  color: var(--color-neutral-foreground-3);
}

.landing-hero-input-wrap input:focus {
  border-color: var(--color-brand-primary);
}

/* ---------- Hero Input Placeholder Rotation ---------- */
.hero-input-placeholder {
  position: absolute;
  left: 42px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-neutral-foreground-3);
  font-family: var(--font-family-base);
  font-size: var(--font-size-400);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 90px);
}

.hero-input-placeholder.visible {
  opacity: 1;
}

.hero-input-placeholder.dimmed {
  opacity: 0.4;
}

/* ---------- Hero Send Button ---------- */
.hero-send-btn {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-medium);
  border: none;
  background: transparent;
  color: var(--color-neutral-foreground-1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--duration-fast), transform var(--duration-fast);
  padding: 0;
}

.hero-send-btn:hover {
  background: var(--color-neutral-background-3);
  transform: translateY(-50%);
}

.hero-send-btn img {
  width: 16px;
  height: 16px;
}

/* ---------- Framework Section ---------- */
.framework-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-l);
}

.framework-separator-label {
  font-size: var(--font-size-100);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-foreground-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
}

.framework-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-s);
}

.framework-pill {
  padding: var(--spacing-xs) var(--spacing-l);
  border-radius: var(--radius-circular);
  border: 1px solid var(--color-neutral-stroke-2);
  background: var(--color-neutral-background-1);
  color: var(--color-neutral-foreground-2);
  font-family: var(--font-family-base);
  font-size: var(--font-size-200);
  font-weight: var(--font-weight-regular);
  cursor: pointer;
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.framework-pill:hover {
  background: var(--color-brand-lighter);
  border-color: var(--color-brand-primary);
  color: var(--color-brand-primary);
  box-shadow: var(--shadow-2);
}

/* ---------- Track Cards (Fluent 2 typography) ---------- */
.landing-tracks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.track-card {
  background: var(--color-neutral-background-1);
  border: 1px solid var(--color-neutral-stroke-2);
  border-radius: var(--radius-xlarge);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-m);
  transition: box-shadow var(--duration-fast), border-color var(--duration-fast);
  cursor: default;
}

.track-card:hover {
  box-shadow: var(--shadow-8);
  border-color: var(--color-neutral-stroke-1);
}

.track-card-icon {
  display: inline-flex;
  align-items: center;
  color: var(--color-brand-primary);
}

.track-card-title {
  font-size: var(--font-size-500);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-foreground-1);
  line-height: var(--line-height-500);
}

.track-card-desc {
  font-size: var(--font-size-300);
  color: var(--color-neutral-foreground-2);
  line-height: var(--line-height-300);
  flex: 1;
}

.track-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-brand-primary);
  font-size: var(--font-size-300);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  font-family: var(--font-family-base);
  transition: color var(--duration-fast);
}

.track-card-link:hover {
  color: var(--color-brand-primary-hover);
  text-decoration: underline;
}

/* ---------- Landing page transition ---------- */
.landing-page.hiding {
  animation: landingFadeOut var(--duration-normal) var(--easing-ease) forwards;
}

@keyframes landingFadeOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-12px); }
}

/* When on landing page, hide sessions toggle */
body.on-landing #topbar-sessions-toggle {
  display: none;
}

/* ---------- Recent Sessions ---------- */
.recent-sessions-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-m);
  max-height: 260px;
  overflow-y: auto;
}

.recent-sessions-label {
  font-size: var(--font-size-200);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-foreground-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.recent-session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-m) var(--spacing-l);
  border-radius: var(--radius-medium);
  border: 1px solid var(--color-neutral-stroke-2);
  background: var(--color-neutral-background-1);
  cursor: pointer;
  transition: all var(--duration-fast);
  position: relative;
}

.recent-session-item:hover {
  border-color: var(--color-neutral-stroke-1);
  box-shadow: var(--shadow-4);
}

.recent-session-title {
  font-size: var(--font-size-300);
  font-weight: var(--font-weight-regular);
  color: var(--color-neutral-foreground-1);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.recent-session-date {
  font-size: var(--font-size-200);
  color: var(--color-neutral-foreground-3);
  white-space: nowrap;
  margin-left: var(--spacing-l);
}

.recent-session-delete {
  display: none;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-left: var(--spacing-s);
  border: none;
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--color-neutral-foreground-3);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: all var(--duration-fast);
}

.recent-session-item:hover .recent-session-delete {
  display: flex;
}

.recent-session-delete:hover {
  background: var(--color-neutral-background-3);
  color: var(--color-neutral-foreground-1);
}

/* ---------- Landing Footer ---------- */
.landing-footer {
  text-align: center;
  padding: var(--spacing-xl) 0 var(--spacing-m);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.landing-footer-version {
  font-size: var(--font-size-100);
  color: var(--color-neutral-foreground-4);
  font-family: var(--font-family-monospace, 'Cascadia Code', 'Consolas', monospace);
  letter-spacing: 0.02em;
}

.landing-footer-disclaimer {
  font-size: var(--font-size-100);
  color: var(--color-neutral-foreground-4);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .landing-page {
    padding: var(--spacing-xl) var(--spacing-m);
  }

  .landing-hero-title {
    font-size: var(--font-size-700);
    line-height: 36px;
  }

  .landing-tracks {
    grid-template-columns: 1fr;
  }
}