*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #000000;
  --surface: #0a0a0a;
  --border:  #1a1a1a;
  --border2: #2a2a2a;
  --text:    #ededed;
  --dim:     #555555;
  --dim2:    #333333;
  --sans:    'Inter', system-ui, sans-serif;
  --mono:    'JetBrains Mono', 'Fira Mono', monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── SHELL ── */
.shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

/* ── HEADER ── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  color: var(--text);
  text-decoration: none;
}

.login-link, .logout-link {
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.15s;
}
.login-link:hover, .logout-link:hover { color: var(--text); }

/* ── FOOTER ── */
.site-footer {
  padding: 1rem 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-size: 0.62rem;
  color: var(--dim2);
  letter-spacing: 0.08em;
}

/* ══════════════════════════════
   LANDING — CAROUSEL
══════════════════════════════ */

.landing-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 0 3rem;
  gap: 0;
  overflow: hidden;
}

/* focused video */
.carousel-stage {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 0 2rem;
}

.carousel-track {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  max-width: 1100px;
  transition: none;
}

.carousel-item {
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  transition: width 0.45s cubic-bezier(0.4,0,0.2,1),
              opacity 0.45s cubic-bezier(0.4,0,0.2,1);
}

.carousel-item.active {
  width: 60%;
  opacity: 1;
}

.carousel-item.side {
  width: 12%;
  opacity: 0.28;
}

.carousel-item.side:hover {
  opacity: 0.5;
}

.carousel-item video,
.carousel-item .carousel-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  display: block;
  object-fit: cover;
  background: var(--surface);
}

.carousel-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16/9;
  background: var(--surface);
  border: 1px solid var(--border);
}

.carousel-placeholder span {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--dim2);
  text-transform: uppercase;
}

/* progress dots */
.carousel-dots {
  display: flex;
  gap: 0.5rem;
  padding-top: 1.5rem;
}

.carousel-dot {
  width: 20px;
  height: 1px;
  background: var(--dim2);
  cursor: pointer;
  transition: background 0.3s, width 0.3s;
}

.carousel-dot.active {
  background: var(--text);
  width: 36px;
}

/* ══════════════════════════════
   LOGIN
══════════════════════════════ */

.login-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.gate-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 200px;
}

.gate-form input {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.5rem 0;
  outline: none;
  letter-spacing: 0.05em;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  border-radius: 0;
}
.gate-form input:focus { border-bottom-color: var(--text); }
.gate-form input::placeholder { color: var(--dim2); }

.gate-form button {
  background: transparent;
  border: none;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  padding: 0.6rem 0 0;
  cursor: pointer;
  text-align: right;
  transition: color 0.15s;
}
.gate-form button:hover { color: var(--text); }

.gate-error {
  font-size: 0.62rem;
  color: var(--dim);
  letter-spacing: 0.08em;
  text-align: right;
  padding-top: 0.25rem;
}

/* ══════════════════════════════
   HOME
══════════════════════════════ */

.home-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 2rem;
  gap: 1rem;
  min-height: calc(100vh - 120px);
}

.card-grid {
  display: flex;
  gap: 2px;
  width: 100%;
  max-width: 640px;
}

.access-card {
  flex: 1;
  padding: 2rem 1.5rem;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  border-right: 1px solid var(--border);
  transition: background 0.2s;
}

.access-card:last-child { border-right: none; }

.access-card:hover {
  background: var(--surface);
}

.access-card.locked {
  opacity: 0.2;
  pointer-events: none;
}

.card-label {
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
}

.card-title {
  font-family: var(--sans);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 1rem;
  color: var(--dim);
  line-height: 1.65;
  flex: 1;
}

.card-arrow {
  font-size: 1rem;
  color: var(--dim2);
  align-self: flex-end;
}

/* ══════════════════════════════
   DEVELOPER AREA
══════════════════════════════ */

.dev-main {
  padding: 2.5rem 2rem 4rem;
  max-width: 1040px;
  margin: 0 auto;
}

.dev-eyebrow {
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 0.4rem;
}

.dev-heading {
  font-family: var(--sans);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}

/* tabs */
.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 1px solid transparent;
  margin-bottom: -1px;
  padding: 0.5rem 1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--text); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* principle cards */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

.principle-card {
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.principle-label {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}

.principle-title {
  font-family: var(--sans);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.principle-body {
  font-size: 0.95rem;
  color: var(--dim);
  line-height: 1.75;
  flex: 1;
}

.principle-lineage {
  font-size: 0.82rem;
  color: var(--dim2);
  line-height: 1.6;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

/* protocols */
.protocols-intro {
  font-size: 0.72rem;
  color: var(--dim);
  line-height: 1.75;
  max-width: 640px;
  margin-bottom: 2rem;
}

.proto-section { margin-bottom: 2rem; }

.proto-section-heading {
  font-size: 1rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.proto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

.proto-item {
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.proto-item-name {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.proto-item-kind {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 0.35rem;
}

.proto-item-desc {
  font-size: 0.9rem;
  color: var(--dim);
  line-height: 1.6;
}

.admission-rule {
  font-size: 0.9rem;
  color: var(--dim);
  line-height: 1.7;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  max-width: 560px;
  margin-bottom: 2rem;
}

/* repos */
.repo-grid { display: grid; gap: 0; border-top: 1px solid var(--border); }

.repo-card {
  padding: 1.5rem 0;
  display: grid;
  grid-template-columns: 140px 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.3rem 2rem;
  align-items: start;
  border-bottom: 1px solid var(--border);
}

.repo-card.primary .repo-name { color: var(--text); }

.repo-name {
  font-size: 0.9rem;
  color: var(--dim);
  letter-spacing: 0.06em;
  grid-column: 1;
  grid-row: 1;
  align-self: start;
  padding-top: 0.1rem;
}

.repo-implements {
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--dim2);
  text-transform: uppercase;
  grid-column: 1;
  grid-row: 2;
}

.repo-desc {
  font-size: 0.95rem;
  color: var(--dim);
  line-height: 1.7;
  grid-column: 2;
  grid-row: 1 / 3;
  max-width: 560px;
}

.repo-link {
  grid-column: 3;
  grid-row: 1;
  font-size: 0.72rem;
  color: var(--dim2);
  text-decoration: none;
  letter-spacing: 0.08em;
  white-space: nowrap;
  transition: color 0.15s;
  padding-top: 0.1rem;
}
.repo-link:hover { color: var(--text); }

/* ── RESPONSIVE ── */
@media (max-width: 700px) {
  .carousel-item.active { width: 80%; }
  .carousel-item.side { width: 8%; }
  .card-grid { flex-direction: column; gap: 0; }
  .access-card { border-right: none; border-bottom: 1px solid var(--border); }
  .repo-card { grid-template-columns: 1fr auto; }
  .repo-desc { grid-column: 1; grid-row: 3; }
  .repo-implements { grid-row: 2; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* ══════════════════════════════
   APIS TAB
══════════════════════════════ */

/* intro line */
.apis-intro {
  font-size: 0.9rem;
  color: var(--dim);
  line-height: 1.75;
  max-width: 640px;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

/* API service cards */
.api-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
  margin-bottom: 3rem;
}

.api-card {
  padding: 1.5rem 0;
  display: grid;
  grid-template-columns: 160px 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.3rem 2rem;
  align-items: start;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.15s;
}

.api-card:hover { background: var(--surface); }
.api-card.open  { background: var(--surface); }

.api-card-name {
  font-size: 0.9rem;
  color: var(--text);
  letter-spacing: 0.06em;
  grid-column: 1;
  grid-row: 1;
  padding-top: 0.1rem;
}

.api-card-kind {
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--dim2);
  text-transform: uppercase;
  grid-column: 1;
  grid-row: 2;
}

.api-card-desc {
  font-size: 0.95rem;
  color: var(--dim);
  line-height: 1.7;
  grid-column: 2;
  grid-row: 1 / 3;
  max-width: 560px;
}

.api-card-toggle {
  grid-column: 3;
  grid-row: 1;
  font-size: 0.72rem;
  color: var(--dim2);
  letter-spacing: 0.08em;
  white-space: nowrap;
  padding-top: 0.1rem;
  transition: color 0.15s;
  user-select: none;
}
.api-card:hover .api-card-toggle { color: var(--text); }

/* swagger drawer */
.swagger-drawer {
  display: none;
  grid-column: 1 / -1;
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 0.5rem;
}
.api-card.open .swagger-drawer { display: block; }

.swagger-heading {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim2);
  margin-bottom: 1rem;
}

.endpoint-list { display: flex; flex-direction: column; gap: 0.4rem; }

.endpoint {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 0 1rem;
  align-items: start;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.endpoint:hover { border-color: var(--border2); background: #0f0f0f; }
.endpoint.ep-open { border-color: var(--border2); background: #0f0f0f; }

.ep-method {
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-top: 0.05rem;
}
.ep-method.get    { color: #4a9eff; }
.ep-method.post   { color: #3dd68c; }
.ep-method.head   { color: #b88cff; }

.ep-path {
  font-size: 0.82rem;
  color: var(--text);
  letter-spacing: 0.02em;
  line-height: 1.4;
}
.ep-path .ep-param { color: #4a9eff; }

.ep-summary {
  font-size: 0.78rem;
  color: var(--dim);
  text-align: right;
  padding-top: 0.05rem;
  white-space: nowrap;
}

/* expanded endpoint detail */
.ep-detail {
  display: none;
  grid-column: 1 / -1;
  padding: 0.75rem 0 0.25rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
}
.endpoint.ep-open .ep-detail { display: block; }

.ep-desc {
  font-size: 0.88rem;
  color: var(--dim);
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

.ep-params-heading {
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dim2);
  margin-bottom: 0.5rem;
}

.ep-param-row {
  display: grid;
  grid-template-columns: 160px 80px 1fr;
  gap: 0 1rem;
  padding: 0.3rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
}
.ep-param-name { color: var(--text); }
.ep-param-type { color: var(--dim2); font-size: 0.75rem; padding-top: 0.06rem; }
.ep-param-desc { color: var(--dim); }

.ep-response-heading {
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dim2);
  margin-top: 0.75rem;
  margin-bottom: 0.5rem;
}

.ep-response-block {
  background: #050505;
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  color: #3dd68c;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
}

@media (max-width: 700px) {
  .api-card { grid-template-columns: 1fr auto; }
  .api-card-desc { grid-column: 1; grid-row: 3; }
  .api-card-kind { grid-row: 2; }
  .endpoint { grid-template-columns: 54px 1fr; }
  .ep-summary { display: none; }
  .ep-param-row { grid-template-columns: 120px 1fr; }
  .ep-param-type { display: none; }
}