/* =========================================================
   TECHNOLOGY STACK PAGE — ts-* styles
   Depends on: common.css (design tokens + utilities)
   Layout: single-column grouped accordion (no side-stretch)
   ========================================================= */

/* ── Hero ─────────────────────────────────────────────── */

.ts-hero {
  position: relative;
  background: var(--gradient-brand-deep);
  padding: 5.5rem 0 4.5rem;
  overflow: hidden;
  color: var(--color-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.ts-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(124, 250, 195, 0.15), transparent 45%),
    radial-gradient(circle at 15% 80%, rgba(87, 50, 250, 0.3), transparent 40%);
  pointer-events: none;
}

.ts-hero h1 {
  color: var(--color-white);
  font-size: clamp(2.5rem, 5.5vw, 3.8rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.ts-hero h1 .mint {
  color: var(--color-mint);
  text-shadow: 0 0 40px rgba(124, 250, 195, 0.2);
}

.ts-hero-lead {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.82);
  max-width: 680px;
  margin-bottom: 0;
  line-height: 1.7;
}

/* Breadcrumb — high contrast on dark hero (white, never purple) */
.ts-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: rgba(255, 255, 255, 0.65);
}

.ts-breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color 0.15s ease;
}

.ts-breadcrumb a:hover {
  color: var(--color-mint);
  text-decoration: underline;
}

.ts-breadcrumb span[aria-hidden] {
  color: rgba(255, 255, 255, 0.4);
}

.ts-breadcrumb span[aria-current="page"] {
  color: var(--color-mint);
  font-weight: 600;
}

/* ── Stats Bar ────────────────────────────────────────── */

.ts-stats {
  background: var(--color-purple-darkest);
  padding: 2rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ts-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

@media (max-width: 768px) {
  .ts-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

.ts-stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.ts-stat-val {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--color-mint);
  line-height: 1;
}

.ts-stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

/* ── Explorer layout ──────────────────────────────────── */

.ts-explorer {
  max-width: 920px;
}

/* ── Filter Controls ──────────────────────────────────── */

.ts-controls-card {
  background: var(--surface);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  box-shadow: var(--shadow-soft);
  margin-bottom: 2.5rem;
}

.ts-search-wrap {
  position: relative;
  margin-bottom: 1rem;
}

.ts-search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-soft);
  pointer-events: none;
}

.ts-search {
  width: 100%;
  height: 46px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 0 1rem 0 2.6rem;
  font: inherit;
  font-size: 0.92rem;
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.ts-search::placeholder {
  color: var(--color-text-soft);
}

.ts-search:focus {
  outline: none;
  border-color: var(--color-purple);
  box-shadow: 0 0 0 3px rgba(79, 46, 222, 0.15);
}

.ts-controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.ts-category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
}

.ts-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-200);
  background: var(--surface);
  color: var(--color-text-muted);
  font: inherit;
  font-size: 0.83rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.ts-pill:hover {
  border-color: var(--color-purple);
  color: var(--color-purple);
  background: var(--surface-soft);
}

.ts-pill--active {
  background: var(--color-purple);
  color: var(--color-white);
  border-color: var(--color-purple);
}

.ts-pill--active:hover {
  background: var(--color-purple-vibrant);
  border-color: var(--color-purple-vibrant);
  color: var(--color-white);
}

.ts-select-wrap {
  position: relative;
  min-width: 210px;
  flex-shrink: 0;
}

.ts-select-icon {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--color-text-soft);
  pointer-events: none;
}

.ts-select {
  width: 100%;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: 0 2.25rem 0 0.85rem;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  appearance: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.ts-select:focus {
  outline: none;
  border-color: var(--color-purple);
  box-shadow: 0 0 0 3px rgba(79, 46, 222, 0.15);
}

.ts-result-count {
  margin: 0.85rem 0 0;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--color-text-soft);
}

/* ── Grouped single-column accordion ────────────────────
   One item per row → opening one never stretches a neighbour. */

.ts-group {
  margin-bottom: 2.5rem;
}

.ts-group:last-of-type {
  margin-bottom: 0;
}

.ts-group[hidden] {
  display: none;
}

.ts-group-head {
  margin-bottom: 1rem;
}

.ts-group-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-gray-900);
  margin: 0 0 0.2rem;
}

.ts-group-desc {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.ts-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: stretch;
}

/* ── Accordion item ───────────────────────────────────── */

.ts-item {
  background: var(--surface);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ts-item:hover {
  border-color: rgba(79, 46, 222, 0.35);
  box-shadow: var(--shadow);
}

.ts-item.is-open {
  border-color: var(--color-purple);
  box-shadow: var(--shadow);
}

.ts-item[hidden] {
  display: none;
}

.ts-item-head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  padding: 0.9rem 1rem;
  background: transparent;
  border: 0;
  font: inherit;
  text-align: left;
  cursor: pointer;
  color: inherit;
}

.ts-item-head:focus-visible {
  outline: 2px solid var(--color-purple);
  outline-offset: 2px;
  border-radius: var(--radius-lg);
}

/* Logo: real brand image with initials fallback underneath */
.ts-logo {
  position: relative;
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.ts-logo-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-purple);
  background: var(--surface-soft);
  letter-spacing: 0.02em;
}

.ts-logo img {
  position: relative;
  z-index: 1;
  width: 30px;
  height: 30px;
  object-fit: contain;
  display: block;
  background: #fff;
}

/* Text block: never overflows the card */
.ts-head-text {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  overflow: hidden;
}

.ts-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-900);
  line-height: 1.3;
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
  display: block;
}

.ts-meta {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-soft);
  white-space: normal;
  overflow-wrap: break-word;
  line-height: 1.4;
  display: block;
}

.ts-badge {
  flex-shrink: 0;
  display: inline-block;
  padding: 3px 11px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.ts-badge--expert {
  background: var(--color-purple);
  color: var(--color-white);
}

.ts-badge--advanced {
  background: var(--color-mint);
  color: var(--color-purple-darkest);
}

.ts-badge--confident {
  background: var(--color-yellow);
  color: var(--color-purple-darkest);
}

.ts-badge--familiar {
  background: var(--color-coral-soft);
  color: var(--color-coral);
}

.ts-badge--learning {
  background: var(--color-gray-200);
  color: var(--color-gray-700);
}

.ts-chevron {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-soft);
  transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.ts-chevron svg {
  width: 16px;
  height: 16px;
  transition: transform 0.25s ease;
}

.ts-item-head:hover .ts-chevron {
  border-color: var(--color-purple);
  color: var(--color-purple);
}

.ts-item.is-open .ts-chevron {
  background: var(--color-purple);
  border-color: var(--color-purple);
  color: #fff;
}

.ts-item.is-open .ts-chevron svg {
  transform: rotate(180deg);
}

/* Body: inside the same full-width row, so no neighbour is affected */
.ts-item-body {
  border-top: 1px solid var(--color-gray-200);
}

.ts-item-body[hidden] {
  display: none;
  border-top: 0;
}

.ts-item-body-inner {
  padding: 1rem 1rem 1.15rem 4.35rem;
}

@media (max-width: 560px) {
  .ts-item-body-inner {
    padding-left: 1rem;
  }
}

.ts-desc {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin: 0 0 0.9rem;
  overflow-wrap: break-word;
}

.ts-projects-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-soft);
  margin-bottom: 0.5rem;
}

.ts-projects-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.ts-project-link {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--surface-soft);
  color: var(--color-purple);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid rgba(79, 46, 222, 0.12);
  transition: all 0.2s ease;
  overflow-wrap: break-word;
}

.ts-project-link:hover {
  background: var(--color-purple);
  color: var(--color-white);
  border-color: var(--color-purple);
}

/* Small screens: badge goes below to avoid squeezing the name */
@media (max-width: 560px) {
  .ts-item-head {
    flex-wrap: wrap;
    row-gap: 0.6rem;
  }

  .ts-head-text {
    flex: 1 1 calc(100% - 48px - 32px - 1.8rem);
  }

  .ts-badge {
    order: 4;
    margin-left: 3.9rem;
  }
}

/* ── Empty State ──────────────────────────────────────── */

.ts-empty {
  text-align: center;
  padding: 3.5rem 2rem;
  background: var(--surface);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  margin-top: 1.5rem;
}

.ts-empty[hidden] {
  display: none;
}

.ts-empty-icon {
  width: 52px;
  height: 52px;
  color: var(--color-text-soft);
  margin: 0 auto 1.25rem;
}

.ts-empty h3 {
  font-size: 1.25rem;
  color: var(--color-gray-900);
  margin-bottom: 0.5rem;
}

.ts-empty p {
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto 1.5rem;
  font-size: 0.95rem;
}

/* ── Capability Levels Grid ───────────────────────────── */

.ts-levels-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .ts-levels-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .ts-levels-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

.ts-level-card {
  background: var(--surface);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: 1.75rem 1.4rem;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  overflow-wrap: break-word;
}

.ts-level-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.ts-level-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}

.ts-level-card[data-accent="purple"]::before { background: var(--color-purple); }
.ts-level-card[data-accent="violet"]::before { background: var(--color-purple-vibrant); }
.ts-level-card[data-accent="mint"]::before { background: var(--color-mint); }
.ts-level-card[data-accent="yellow"]::before { background: var(--color-yellow); }
.ts-level-card[data-accent="coral"]::before { background: var(--color-coral); }

.ts-level-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.ts-level-badge--expert {
  background: var(--color-purple);
  color: var(--color-white);
}

.ts-level-badge--advanced {
  background: var(--color-mint);
  color: var(--color-purple-darkest);
}

.ts-level-badge--confident {
  background: var(--color-yellow);
  color: var(--color-purple-darkest);
}

.ts-level-badge--familiar {
  background: var(--color-coral-soft);
  color: var(--color-coral);
}

.ts-level-badge--learning {
  background: var(--color-gray-200);
  color: var(--color-gray-700);
}

.ts-level-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 0;
}