@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

.cert-hub {
  --ink: #111318;
  --muted: #5B6472;
  --rule: #E4E7EB;
  --rule-strong: #CBD1D8;
  --bg: #FAFAFA;
  --panel: #FFFFFF;
  --blue: #1D4ED8;
  --blue-tint: #EAF0FD;
  --black: #111318;
  --good: #198754;
  --cfg: #0a4d8c;
  --ing: #1a75c5;
  --gov: #198754;
  --ins: #ffc107;
  --csdm: #6f42c1;
  --cross: #20c997;

  box-sizing: border-box;
  background: var(--bg);
  color: var(--ink);
  font-family: 'IBM Plex Sans', sans-serif;
  line-height: 1.5;
  font-size: 14px;
}

.cert-hub *,
.cert-hub *::before,
.cert-hub *::after {
  box-sizing: border-box;
}

.cert-hub h1,
.cert-hub h2,
.cert-hub h3,
.cert-hub h4 {
  font-family: 'Space Grotesk', sans-serif;
  letter-spacing: -0.01em;
}

.cert-hub .mono {
  font-family: 'IBM Plex Mono', monospace;
}

.cert-hub a {
  color: var(--blue);
  text-decoration: none;
}

.cert-hub a:hover {
  text-decoration: underline;
}

.cert-hub button {
  font-family: inherit;
}

.cert-hub .layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 60px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
}

.cert-hub .title-block {
  grid-column: 1 / -1;
  padding: 30px 0 18px;
  border-bottom: 2px solid var(--ink);
}

.cert-hub .title-block h1 {
  font-size: 32px;
  margin: 0 0 6px;
  font-weight: 700;
}

.cert-hub .title-block .sub {
  font-size: 13.5px;
  color: var(--muted);
}

.cert-hub .title-block .sub b {
  color: var(--ink);
  font-weight: 600;
}

.cert-hub .main-col {
  min-width: 0;
}

.cert-hub .spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0 0;
}

.cert-hub .spec-table tr {
  border-bottom: 1px solid var(--rule);
}

.cert-hub .spec-table tr:first-child {
  border-top: 1px solid var(--rule);
}

.cert-hub .spec-table td {
  padding: 9px 4px;
  font-size: 13px;
}

.cert-hub .spec-table td.k {
  color: var(--muted);
  width: 38%;
  font-weight: 500;
}

.cert-hub .spec-table td.v {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
  color: var(--ink);
}

.cert-hub .spec-table td.v.hl {
  color: var(--blue);
  font-weight: 600;
}

.cert-hub .section {
  margin-top: 28px;
}

.cert-hub .section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 6px;
  margin-bottom: 12px;
  gap: 12px;
}

.cert-hub .section-title h2 {
  font-size: 16.5px;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: .03em;
}

/* Official blueprint — bar + copy, no card chrome */
.cert-hub .blueprint-list {
  border-top: 1px solid var(--rule);
}

.cert-hub .blueprint-domain {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--rule);
}

.cert-hub .blueprint-domain-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.cert-hub .blueprint-domain-head .dname {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cert-hub .blueprint-domain-head .swatch {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  flex-shrink: 0;
}

.cert-hub .blueprint-domain-head .wpct {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.cert-hub .blueprint-track {
  height: 5px;
  background: #EEF1F5;
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 12px;
}

.cert-hub .blueprint-fill {
  height: 100%;
  border-radius: 99px;
  width: 0;
  transition: width .55s cubic-bezier(.4, 0, .2, 1);
}

.cert-hub .blueprint-domain p {
  margin: 0 0 8px;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.6;
  max-width: 68ch;
}

.cert-hub .blueprint-domain p:last-child {
  margin-bottom: 0;
}

/* Resource Center — browse-style artifact cards */
.cert-hub .resource-group {
  margin-bottom: 26px;
}

.cert-hub .resource-group:last-child {
  margin-bottom: 0;
}

.cert-hub .resource-group-title {
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
  margin: 0 0 .75rem;
}

.cert-hub .resource-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cert-hub .artifact-card {
  display: block;
  padding: 14px 14px 12px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--panel);
  color: inherit;
  transition: border-color .15s ease, box-shadow .15s ease;
}

.cert-hub a.artifact-card:hover {
  border-color: #CFD4DC;
  box-shadow: 0 8px 20px -16px rgba(17, 19, 24, .35);
  text-decoration: none;
}

.cert-hub .artifact-type {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-tint);
  padding: 2px 7px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.cert-hub .artifact-type.flash {
  color: var(--csdm);
  background: #F3EEFA;
}

.cert-hub .artifact-type.lab {
  color: var(--good);
  background: #F0FAF4;
}

.cert-hub .artifact-type.sheet {
  color: #64748B;
  background: #F1F5F9;
}

.cert-hub .artifact-title {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink);
  margin: 0 0 6px;
  line-height: 1.3;
}

.cert-hub a.artifact-card:hover .artifact-title {
  color: var(--blue);
}

.cert-hub .artifact-author {
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 8px;
}

.cert-hub .artifact-author b {
  color: var(--ink);
  font-weight: 600;
}

.cert-hub .artifact-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  font-size: 12px;
  color: var(--muted);
}

.cert-hub .artifact-metrics span {
  white-space: nowrap;
}

.cert-hub .artifact-metrics .star {
  color: #B8860B;
}

.cert-hub .resource-empty {
  padding: 18px 14px;
  border: 1px dashed var(--rule-strong);
  border-radius: 8px;
  background: #FBFBFC;
  text-align: center;
}

.cert-hub .resource-empty p {
  margin: 0 0 12px;
  font-size: 13.5px;
  color: var(--muted);
}

.cert-hub .resource-create {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 9px 14px;
  border-radius: 7px;
  background: var(--ink);
  color: #fff;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.cert-hub .resource-create:hover {
  opacity: .9;
  text-decoration: none;
  color: #fff;
}

/* RIGHT RAIL */
.cert-hub .rail {
  position: sticky;
  top: 16px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 30px;
}

.cert-hub .rail-card {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 9px;
  padding: 14px 16px;
}

.cert-hub .rail-card h4 {
  margin: 0 0 10px;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
  font-weight: 600;
}

/* Exam Readiness */
.cert-hub .readiness-body {
  text-align: center;
}

.cert-hub .readiness-ring {
  padding: .25rem 0 .5rem;
}

.cert-hub .readiness-score-wrap {
  width: 7rem;
  height: 7rem;
  margin: 0 auto .6rem;
  border-radius: 50%;
  border: 8px solid #f1f5f9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: conic-gradient(var(--blue) calc(var(--readiness-pct) * 1%), #f1f5f9 0);
}

.cert-hub .readiness-score {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--ink);
  line-height: 1;
  font-family: 'Space Grotesk', sans-serif;
}

.cert-hub .readiness-lbl {
  font-size: .625rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #94a3b8;
}

.cert-hub .readiness-msg {
  font-size: .75rem;
  margin: 0;
  line-height: 1.45;
  color: var(--muted);
}

/* Flash Review */
.cert-hub .flash-select {
  width: 100%;
  border: 1px solid var(--rule);
  border-radius: 5px;
  padding: 7px 8px;
  font-size: 12px;
  background: var(--bg);
  margin-bottom: 10px;
  font-family: 'IBM Plex Sans', sans-serif;
  color: var(--ink);
}

.cert-hub .flipcard {
  width: 100%;
  height: 118px;
  perspective: 800px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.cert-hub .flipcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform .5s;
  transform-style: preserve-3d;
}

.cert-hub .flipcard.flipped .flipcard-inner {
  transform: rotateY(180deg);
}

.cert-hub .flipcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  font-size: 12.5px;
  border: 1px solid var(--rule);
  line-height: 1.35;
}

.cert-hub .flipcard-face.front {
  background: var(--blue-tint);
  color: var(--blue);
  font-weight: 600;
}

.cert-hub .flipcard-face.back {
  background: var(--ink);
  color: #F1F1F1;
  transform: rotateY(180deg);
  font-size: 11.5px;
}

.cert-hub .flip-hint {
  text-align: center;
  font-size: 10.5px;
  color: var(--muted);
  margin-top: 6px;
}

.cert-hub .flash-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--rule);
  gap: 8px;
}

.cert-hub .flash-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.cert-hub .flash-arrow {
  width: 32px;
  height: 32px;
  border: 1px solid var(--rule-strong);
  background: var(--bg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  color: var(--ink);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.cert-hub .flash-arrow:hover:not(:disabled) {
  border-color: var(--ink);
  background: var(--panel);
}

.cert-hub .flash-arrow:disabled {
  opacity: .35;
  cursor: default;
}

.cert-hub .flash-counter {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  min-width: 7.5em;
  text-align: center;
}

.cert-hub .flash-mastered-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.cert-hub .flash-mastered {
  border: 1px solid #A7D9C0;
  background: #F0FAF4;
  color: var(--good);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.cert-hub .flash-mastered:hover {
  border-color: var(--good);
}

.cert-hub .flash-mastered.is-on {
  background: var(--good);
  color: #fff;
  border-color: var(--good);
}

.cert-hub .flash-mastered-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--muted);
}

.cert-hub .flash-mastered-meta b {
  color: var(--good);
}

/* Random Question Drill */
.cert-hub .drill-sub {
  font-size: 11.5px;
  color: var(--muted);
  margin: -6px 0 10px;
}

.cert-hub .drill-sub a {
  font-weight: 600;
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.cert-hub .drill-sub a:hover {
  color: var(--blue);
}

.cert-hub .drill-q {
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 10px;
}

.cert-hub .drill-opts {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.cert-hub .drill-opt {
  text-align: left;
  border: 1px solid var(--rule);
  background: var(--bg);
  border-radius: 5px;
  padding: 7px 9px;
  font-size: 12px;
  cursor: pointer;
  color: var(--ink);
  line-height: 1.35;
  transition: border-color .15s ease, background .15s ease;
}

.cert-hub .drill-opt:hover:not(:disabled) {
  border-color: var(--blue);
  background: var(--blue-tint);
}

.cert-hub .drill-opt:disabled {
  cursor: default;
}

.cert-hub .drill-opt.correct {
  border-color: var(--good);
  background: #F0FAF4;
  color: var(--good);
  font-weight: 600;
}

.cert-hub .drill-opt.wrong {
  border-color: #D9534F;
  background: #FDF2F2;
  color: #B42318;
}

.cert-hub .drill-opt.dim {
  opacity: .5;
}

.cert-hub .drill-feedback {
  font-size: 11.5px;
  color: var(--muted);
  min-height: 1.2em;
  margin-top: 8px;
}

.cert-hub .drill-feedback.ok {
  color: var(--good);
}

.cert-hub .drill-feedback.bad {
  color: #B42318;
}

.cert-hub .mastery-prompt {
  display: none;
  margin-top: 10px;
  padding: 10px;
  border: 1px solid #A7D9C0;
  background: #F0FAF4;
  border-radius: 6px;
  font-size: 12px;
  color: var(--ink);
}

.cert-hub .mastery-prompt.is-visible {
  display: block;
}

.cert-hub .mastery-prompt p {
  margin: 0 0 8px;
  line-height: 1.4;
}

.cert-hub .mastery-prompt-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.cert-hub .mastery-prompt-actions button {
  border-radius: 5px;
  padding: 6px 10px;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
}

.cert-hub .mastery-prompt-actions .yes {
  background: var(--good);
  color: #fff;
  border: 1px solid var(--good);
}

.cert-hub .mastery-prompt-actions .no {
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink);
}

/* Activity Feed */
.cert-hub .feed-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.cert-hub .feed-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 8px;
  padding: 9px 0;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  line-height: 1.35;
}

.cert-hub .feed-item:first-child {
  border-top: none;
  padding-top: 2px;
}

.cert-hub .feed-avatar {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: var(--blue-tint);
  color: var(--blue);
  font-weight: 700;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-hub .feed-avatar.g {
  background: #F0FAF4;
  color: var(--good);
}

.cert-hub .feed-avatar.p {
  background: #F3EEFA;
  color: var(--csdm);
}

.cert-hub .feed-avatar.y {
  background: #FFF8E6;
  color: #B8860B;
}

.cert-hub .feed-body strong {
  font-weight: 600;
  color: var(--ink);
}

.cert-hub .feed-body span {
  color: var(--muted);
}

.cert-hub .feed-time {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--muted);
  margin-top: 2px;
}

@media (max-width: 920px) {
  .cert-hub .layout {
    grid-template-columns: 1fr;
  }

  .cert-hub .rail {
    position: static;
    padding-top: 0;
  }
}

@media (max-width: 600px) {
  .cert-hub .title-block h1 {
    font-size: 24px;
  }
}