/* ============================================================
   VPNDK Design System — components.css
   Cross-page components: tabs, TOC, FAQ, plan cards,
   line tables, platform cards, blog cards, callout,
   promo block, float CTA
   ============================================================ */

/* ================= Tabs ================= */
.tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 24px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab-item {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-dim);
  padding: 10px 18px;
  border-radius: var(--rad-s) var(--rad-s) 0 0;
  border: 1px solid transparent;
  border-bottom: none;
  cursor: pointer;
  white-space: nowrap;
  transition: color .15s, background .15s, border-color .15s;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tab-item:hover {
  color: var(--c-ink);
  background: var(--c-panel);
}

.tab-item[aria-selected="true"] {
  color: var(--c-acc);
  background: var(--c-panel);
  border-color: var(--c-line);
  border-bottom: 1px solid var(--c-panel);
  margin-bottom: -1px;
  font-weight: 700;
}

.tab-panel {
  display: none;
  padding: 24px 0;
}

.tab-panel.active {
  display: block;
}

/* ================= TOC Tabs ================= */
.toc-tabs {
  position: sticky;
  top: calc(var(--header-h) + 8px);
  z-index: 15;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--rad-pill);
  padding: 6px;
  margin-bottom: 32px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  max-width: 100%;
}

.toc-tabs::-webkit-scrollbar {
  display: none;
}

.toc-tabs a {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-dim);
  padding: 8px 16px;
  border-radius: var(--rad-pill);
  white-space: nowrap;
  transition: color .15s, background .15s;
  flex: none;
}

.toc-tabs a:hover {
  color: var(--c-ink);
  background: var(--c-panel2);
}

.toc-tabs a.active {
  color: var(--c-acc);
  background: var(--tint-acc);
  font-weight: 700;
}

body:has(.toc-tabs) section[id],
body:has(.toc-tabs) h2[id] {
  scroll-margin-top: calc(var(--header-h) + 72px);
}

/* ================= FAQ ================= */
.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--rad-m);
  background: var(--c-panel);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
  min-height: 52px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--c-acc);
  flex: none;
  transition: transform .2s;
  line-height: 1;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-body {
  padding: 0 22px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-dim);
}

.faq-item .faq-body p {
  margin-bottom: 10px;
}

.faq-item .faq-body p:last-child {
  margin-bottom: 0;
}

/* ================= Plan Cards ================= */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.plan-card {
  position: relative;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--rad-l);
  padding: 28px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}

.plan-card:hover {
  border-color: var(--tint-acc-bd);
  transform: translateY(-2px);
  box-shadow: var(--shade-card);
}

.plan-card.featured {
  border-color: var(--tint-acc-bd);
  background: var(--c-panel2);
  box-shadow: var(--shade-card);
}

.plan-card .plan-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  font-size: 11px;
  font-weight: 700;
  color: var(--c-bg);
  background: var(--c-acc);
  border-radius: var(--rad-pill);
  padding: 4px 12px;
  letter-spacing: .04em;
}

.plan-card .plan-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.plan-card .plan-price {
  font-family: var(--ff-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--c-acc);
  line-height: 1.1;
  margin-bottom: 4px;
}

.plan-card .plan-price small {
  font-size: 13px;
  font-weight: 400;
  color: var(--c-dim);
  font-family: var(--ff-body);
}

.plan-card .plan-traffic {
  font-size: 13px;
  color: var(--c-dim);
  margin-bottom: 16px;
}

.plan-card .plan-desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-dim);
  margin-bottom: 20px;
  flex-grow: 1;
}

.plan-card .plan-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--c-bg);
  background: var(--c-acc);
  padding: 12px 24px;
  border-radius: var(--rad-m);
  transition: background .15s, transform .15s;
  min-height: 44px;
}

.plan-card .plan-btn:hover {
  background: var(--c-ok);
  transform: translateY(-1px);
}

.plan-card .plan-btn.btn-outline {
  color: var(--c-acc);
  background: transparent;
  border: 1px solid var(--tint-acc-bd);
}

.plan-card .plan-btn.btn-outline:hover {
  background: var(--tint-acc);
}

/* ================= Line Table ================= */
.table-wrap {
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--c-line);
  border-radius: var(--rad-m);
  background: var(--c-panel);
}

.line-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 13.5px;
}

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}

.line-table th {
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-dim);
  background: var(--c-panel2);
  padding: 14px 18px;
  border-bottom: 1px solid var(--c-line);
  white-space: nowrap;
}

.line-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink);
  vertical-align: middle;
}

.line-table tr:last-child td {
  border-bottom: none;
}

.line-table tbody tr:hover {
  background: var(--c-panel2);
}

.line-table .cell-flag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.line-table .cell-type {
  font-size: 12px;
  color: var(--c-dim);
  border: 1px solid var(--c-line);
  border-radius: var(--rad-pill);
  padding: 3px 10px;
  white-space: nowrap;
}

.line-table .cell-type.special {
  color: var(--c-acc);
  border-color: var(--tint-acc-bd);
}

.line-table .stream-yes {
  color: var(--c-ok);
  font-weight: 700;
}

.line-table .stream-no {
  color: var(--c-dim);
}

/* ================= Platform Cards ================= */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.platform-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--rad-m);
  padding: 24px 16px;
  text-align: center;
  transition: border-color .2s, transform .2s;
  min-width: 0;
}

.platform-card:hover {
  border-color: var(--tint-acc-bd);
  transform: translateY(-2px);
}

.platform-card .plat-icon {
  color: var(--c-acc);
  flex: none;
}

.platform-card .plat-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-ink);
}

.platform-card .plat-btn {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--c-acc);
  border: 1px solid var(--tint-acc-bd);
  border-radius: var(--rad-s);
  padding: 8px 18px;
  transition: background .15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
}

.platform-card .plat-btn:hover {
  background: var(--tint-acc);
}

/* ================= Blog Cards ================= */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.blog-card {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--rad-l);
  overflow: hidden;
  transition: border-color .2s, transform .2s, box-shadow .2s;
  min-width: 0;
}

.blog-card:hover {
  border-color: var(--tint-acc-bd);
  transform: translateY(-2px);
  box-shadow: var(--shade-card);
}

.blog-card .blog-card-body {
  padding: 22px;
}

.blog-card .blog-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--c-acc);
  background: var(--tint-acc);
  border-radius: var(--rad-pill);
  padding: 3px 10px;
  margin-bottom: 12px;
  letter-spacing: .04em;
}

.blog-card .blog-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}

.blog-card .blog-summary {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-dim);
  margin-bottom: 14px;
}

.blog-card .blog-meta {
  font-size: 12px;
  color: var(--c-dim);
  font-family: var(--ff-mono);
}

/* ================= Callout ================= */
.callout {
  border-left: 3px solid var(--c-acc);
  background: var(--c-panel);
  border-radius: 0 var(--rad-m) var(--rad-m) 0;
  padding: 18px 22px;
  margin: 20px 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-dim);
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout-warn {
  border-left-color: var(--c-warn);
}

.callout-error {
  border-left-color: var(--c-err);
}

/* ================= End-of-Article Promo ================= */
.promo-block {
  background: var(--c-panel2);
  border: 1px solid var(--tint-acc-bd);
  border-radius: var(--rad-l);
  padding: 32px;
  margin: 36px 0;
  text-align: center;
}

.promo-block .promo-brand {
  font-family: var(--ff-disp);
  font-size: 22px;
  font-weight: 900;
  color: var(--c-ink);
  margin-bottom: 8px;
}

.promo-block .promo-line {
  font-size: 14.5px;
  color: var(--c-dim);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.promo-block .promo-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 800;
  color: var(--c-bg);
  background: var(--c-acc);
  padding: 13px 32px;
  border-radius: var(--rad-m);
  box-shadow: var(--shade-cta);
  transition: transform .15s, background .15s;
  min-height: 48px;
}

.promo-block .promo-cta:hover {
  transform: translateY(-1px);
  background: var(--c-ok);
}

/* ================= Float CTA ================= */
.float-cta {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--c-acc);
  color: var(--c-bg);
  font-weight: 800;
  font-size: 14px;
  padding: 13px 23px;
  border-radius: var(--rad-pill);
  box-shadow: var(--shade-cta);
  transition: transform .15s;
  min-height: 48px;
}

.float-cta:hover {
  transform: translateY(-2px);
}

.float-cta svg {
  flex: none;
}

body:has(.float-cta)::after {
  content: '';
  display: block;
  height: calc(88px + env(safe-area-inset-bottom, 0px));
}

/* ================= Badges & Tags ================= */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-acc);
  background: var(--tint-acc);
  border: 1px solid var(--tint-acc-bd);
  border-radius: var(--rad-pill);
  padding: 5px 14px;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-acc);
  flex: none;
}

.badge-neutral {
  color: var(--c-dim);
  background: var(--c-panel);
  border-color: var(--c-line);
}

.tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--c-acc);
  background: var(--tint-acc);
  border-radius: 4px;
  padding: 3px 8px;
  letter-spacing: .02em;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ================= Feature Rows (alternating) ================= */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid var(--c-line);
}

.feature-row:last-child {
  border-bottom: none;
}

.feature-row.reverse {
  direction: rtl;
}

.feature-row.reverse > * {
  direction: ltr;
}

.feature-copy {
  min-width: 0;
}

.feature-copy .feature-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  color: var(--c-acc);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.feature-copy h2 {
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
}

.feature-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-dim);
  max-width: 480px;
}

.feature-panel {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--rad-l);
  padding: 28px;
  min-width: 0;
}

.feature-panel h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 12px;
}

/* ================= Responsive Components ================= */
@media (max-width: 1120px) {
  .plans-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }
  .platform-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .blog-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }
  .feature-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .feature-row.reverse {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .toc-tabs {
    top: calc(var(--header-h) + 4px);
    border-radius: var(--rad-s);
    padding: 4px;
  }
  .toc-tabs a {
    font-size: 12.5px;
    padding: 7px 13px;
  }
  .float-cta {
    right: 16px;
    bottom: 16px;
    font-size: 13px;
    padding: 11px 19px;
  }
  .promo-block {
    padding: 24px 18px;
  }
}

@media (max-width: 480px) {
  .platform-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .tab-item {
    padding: 8px 14px;
    font-size: 13px;
  }
}