/* Students guide — page content on black-dot site chrome */

html {
  --site-head: 3rem;
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--white-40);
  margin-bottom: 0.65rem;
}

.page-hero-eyebrow {
  display: block;
  margin-bottom: var(--space-3);
}

.page-hero {
  box-sizing: border-box;
  min-height: calc(100svh - var(--site-head, 3rem));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: clamp(1rem, 4vh, 2.25rem);
  padding-bottom: clamp(1rem, 4vh, 2.25rem);
}

.students-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.students-section {
  box-sizing: border-box;
  min-height: calc(100svh - var(--site-head, 3rem));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(0.85rem, 3vh, 1.75rem) 0;
  border-top: 1px solid var(--white-10);
  scroll-margin-top: var(--site-head);
}

.students-section:first-child {
  border-top: none;
  padding-top: 0;
}

.students-section:last-child {
  min-height: 0;
}

.section-heading {
  margin-bottom: clamp(0.5rem, 1.6vh, 1rem);
  flex-shrink: 0;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--white);
  line-height: 1.2;
}

.section-lede {
  margin: 0.65rem 0 0;
  max-width: 40rem;
  color: var(--white-70);
  font-size: 0.95rem;
  line-height: 1.55;
}

.pattern-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.65rem;
}

.pattern-steps li {
  display: grid;
  gap: 0.25rem;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--hairline);
  background: var(--bg-light);
  border-radius: var(--radius);
}

.pattern-steps strong {
  font-weight: 500;
  color: var(--white);
}

.pattern-steps span {
  color: var(--white-70);
  font-size: 0.92rem;
}

.pattern-steps code,
.steps code,
.local-run code,
.faq-item code {
  font-size: 0.85em;
  color: var(--white);
}

[hidden] {
  display: none !important;
}

.sample-stage {
  border: 1px solid var(--hairline);
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 0.75rem 0.85rem;
  min-height: 0;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
}

.sample-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.file-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.file-tab {
  font: inherit;
  font-size: 0.8rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--white-70);
  cursor: pointer;
}

.file-tab.is-active {
  border-color: var(--white);
  color: var(--white);
  background: var(--black);
}

.sample-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: var(--white-70);
  cursor: pointer;
}

.file-panel,
.mini-file,
.code-snippet,
.run-json {
  margin: 0;
  padding: 0.75rem 0.85rem;
  overflow: auto;
  max-height: min(14rem, 28vh);
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--white-92);
  background: var(--black);
  border: 1px solid var(--white-10);
  border-radius: var(--radius);
}

.mini-file {
  max-height: min(8rem, 18vh);
  margin-top: 0.4rem;
}

.sample-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.run-outcome {
  margin-top: 1.1rem;
  display: grid;
  gap: 0.75rem;
}

.run-status {
  margin: 0;
  color: var(--white);
  font-size: 0.92rem;
}

.local-run {
  margin-top: 0.65rem;
  flex-shrink: 0;
}

.local-run h3 {
  margin: 0 0 0.45rem;
}

.local-run p {
  margin: 0 0 0.65rem;
}

.local-run .code-snippet {
  margin-bottom: 0.65rem;
}

.proof-card p {
  max-width: 44rem;
}

.proof-card p + p {
  margin-top: 0.75rem;
}

.proof-card a {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.grid-3,
.grid-2 {
  display: grid;
  gap: 0.65rem;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--hairline);
  background: var(--bg-light);
  border-radius: var(--radius);
}

.card h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--white);
}

.card p {
  margin: 0;
  color: var(--white-70);
  font-size: 0.92rem;
  line-height: 1.55;
}

.card.highlight {
  border-left: 2px solid var(--white);
}

.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  color: var(--white);
  margin-bottom: 0.75rem;
}

.icon-badge svg {
  width: 1.2rem;
  height: 1.2rem;
}

.flow-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 0.65rem;
  align-items: center;
  padding: 1.35rem 1.15rem;
  border: 1px solid var(--hairline);
  background: var(--bg-light);
  border-radius: var(--radius);
}

.flow-step {
  display: grid;
  gap: 0.3rem;
  justify-items: center;
  text-align: center;
}

.flow-step strong {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--white);
}

.flow-step span {
  font-size: 0.8rem;
  color: var(--white-40);
}

.flow-arrow {
  font-size: 1.2rem;
  color: var(--white-40);
  font-weight: 500;
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.steps li {
  display: grid;
  gap: 0.25rem;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--hairline);
  background: var(--bg-light);
  border-radius: var(--radius);
}

.steps strong {
  font-weight: 500;
  color: var(--white);
}

.steps span {
  color: var(--white-70);
  font-size: 0.92rem;
}

.steps a {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.students-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-4);
}

.subsection-title {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--white);
}

.glossary {
  margin: 0;
}

.glossary-item {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--white-10);
}

.glossary-item:last-child {
  border-bottom: none;
}

.glossary dt {
  font-weight: 500;
  color: var(--white);
  margin-bottom: 0.2rem;
}

.glossary dd {
  margin: 0;
  color: var(--white-70);
  font-size: 0.92rem;
}

.faq-list {
  display: grid;
  gap: 0.55rem;
}

.faq-item {
  padding: 0.85rem 1rem;
  border: 1px solid var(--hairline);
  background: var(--bg-light);
  border-radius: var(--radius);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--white);
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--white-40);
  font-weight: 500;
}

.faq-item[open] summary::after {
  content: "−";
}

.proof-grant-link {
  display: inline;
  padding: 0;
  margin: 0;
  border: 0;
  background: none;
  font: inherit;
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  cursor: pointer;
}

.proof-grant-link:hover {
  color: var(--white-70);
}

.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-content {
  background: var(--black);
  border: 1px solid var(--hairline);
  width: min(100%, 420px);
  padding: 1.25rem;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.55rem;
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--white-10);
}

.modal-header h3 {
  margin: 0;
  font-weight: 500;
  font-size: 1.05rem;
}

.modal-close {
  background: transparent;
  border: 0;
  color: var(--white-70);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-lead {
  color: var(--white-70);
  margin: 0 0 0.55rem;
  font-size: 0.85rem;
}

.modal .form-group {
  margin-bottom: 0.55rem;
}

.modal .form-group label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white-40);
  margin-bottom: 0.3rem;
}

.modal .form-group input {
  width: 100%;
  font: inherit;
  color: var(--white);
  background: var(--ink);
  border: 1px solid var(--hairline);
  padding: 0.5rem 0.65rem;
}

.modal .form-group input:focus {
  outline: none;
  border-color: var(--white);
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
}

.form-row-2 .form-group {
  margin-bottom: 0.45rem;
}

.form-row-2 .form-group label {
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.72rem;
  line-height: 1.25;
  margin-bottom: 0.2rem;
}

.form-row-2 .form-group input {
  padding: 0.4rem 0.5rem;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: var(--space-3);
}

.modal-cancel-btn,
.modal-submit-btn {
  font: inherit;
  cursor: pointer;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
}

.modal-cancel-btn {
  background: transparent;
  border: 1px solid var(--hairline);
  color: var(--white);
}

.modal-submit-btn {
  background: var(--white);
  border: 1px solid var(--white);
  color: var(--black);
}

@media (max-width: 420px) {
  .form-row-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .flow-diagram {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

  .file-panel {
    max-height: min(12rem, 26vh);
  }

  .page-hero,
  .students-section {
    justify-content: flex-start;
    min-height: calc(100svh - var(--site-head, 3rem));
  }
}