/* Sign-in page: Option B, the catalog sheet.
   Same anatomy as the course welcome page (course-detail.css): an editorial
   column on the left, an access sheet on the right. Tokens come from
   catalog.css (--academy-*), so dark mode follows the rest of the LMS. */

:root {
  --signin-serif: "Iowan Old Style", "Charter", Georgia, serif;
  --signin-mono: "SF Mono", Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

.signin-root {
  min-height: 100vh;
  background: var(--academy-bg);
}

.signin-main {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 18px 40px 64px;
}

/* ---------- Crumb row ---------- */

.signin-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--academy-line);
  padding-bottom: 12px;
}

.signin-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--academy-muted);
  font-family: var(--signin-mono);
  font-size: 10.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.signin-crumb a:hover {
  color: var(--academy-accent);
}

.signin-crumb [aria-current="page"] {
  color: var(--academy-ink);
}

.signin-crumb-sep {
  color: var(--academy-line);
}

.signin-mode {
  display: inline-flex;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--academy-line);
  border-radius: 4px;
  background: transparent;
  color: var(--academy-muted);
  cursor: pointer;
  padding: 0;
}

.signin-mode:hover {
  border-color: var(--academy-accent);
  color: var(--academy-ink);
}

.signin-mode-sun,
html[data-theme="dark"] .signin-mode-moon {
  display: none;
}

html[data-theme="dark"] .signin-mode-sun {
  display: block;
}

/* ---------- Grid ---------- */

.signin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 56px;
  align-items: start;
}

.signin-body {
  min-width: 0;
}

.signin-eyebrow,
.signin-kicker {
  margin: 0 0 10px;
  font-family: var(--signin-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.signin-eyebrow {
  color: var(--academy-accent);
}

.signin-kicker {
  margin-bottom: 4px;
  color: var(--academy-muted);
}

.signin-body h1 {
  max-width: 24ch;
  margin: 0 0 10px;
  color: var(--academy-ink);
  font-family: var(--signin-serif);
  font-size: 30px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.signin-lead {
  max-width: 56ch;
  margin: 0 0 18px;
  color: var(--academy-muted);
  font-size: 14.5px;
  line-height: 1.55;
}

.signin-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 26px;
}

.signin-tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--academy-line);
  border-radius: 2px;
  color: var(--academy-muted);
  padding: 3px 7px;
  font-family: var(--signin-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.signin-steps {
  margin-bottom: 26px;
  border-top: 1px solid var(--academy-line);
  padding-top: 18px;
}

.signin-step-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.signin-step-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border-bottom: 1px solid var(--academy-line);
  padding: 10px 0;
}

.signin-step-list li:last-child {
  border-bottom: 0;
}

.signin-step-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.5;
}

.signin-step-list strong {
  font-weight: 600;
}

.signin-step-list p span {
  color: var(--academy-muted);
}

.signin-step-num {
  display: inline-flex;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--academy-line);
  border-radius: 2px;
  color: var(--academy-muted);
  font-family: var(--signin-mono);
  font-size: 10.5px;
}

.signin-private {
  max-width: 56ch;
  margin: 0;
  color: var(--academy-muted);
  font-size: 13px;
  line-height: 1.55;
}

.signin-private strong {
  color: var(--academy-ink);
  font-weight: 600;
}

/* ---------- Access sheet ---------- */

.signin-sheet {
  position: sticky;
  top: 72px;
  display: grid;
  gap: 14px;
  border: 1px solid var(--academy-line);
  border-radius: 6px;
  background: var(--academy-surface);
  padding: 18px;
}

.signin-sheet[aria-busy="true"] {
  cursor: wait;
}

.signin-line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--academy-muted);
  font-size: 12.5px;
  line-height: 1.4;
}

.signin-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--academy-muted);
}

.signin-dot[data-tone="wait"] { background: var(--academy-amber); }
.signin-dot[data-tone="ready"] { background: var(--academy-success); }
.signin-dot[data-tone="error"] { background: var(--academy-coral); }

.signin-form {
  display: grid;
  gap: 10px;
  margin: 0;
}

.signin-field {
  display: grid;
  gap: 6px;
}

.signin-field > span {
  color: var(--academy-muted);
  font-size: 12.5px;
}

.signin-field input {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--academy-line);
  border-radius: 4px;
  background: var(--academy-surface);
  color: var(--academy-ink);
  padding: 0 12px;
  font: inherit;
  font-size: 14px;
}

.signin-field input::placeholder {
  color: color-mix(in srgb, var(--academy-muted) 70%, transparent);
}

.signin-field input:focus {
  border-color: var(--academy-accent);
  outline: none;
}

.signin-static {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 38px;
  border: 1px solid var(--academy-line);
  border-radius: 4px;
  background: var(--academy-surface);
  color: var(--academy-ink);
  padding: 0 12px;
  font-size: 14px;
}

.signin-static > span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.signin-change {
  flex: 0 0 auto;
  border: 0;
  background: transparent;
  color: var(--academy-muted);
  cursor: pointer;
  padding: 0;
  font-size: 12px;
  font-weight: 600;
}

.signin-change:hover {
  color: var(--academy-accent);
}

.signin-rows {
  margin: 0;
}

.signin-rows div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--academy-line);
  padding: 6px 0;
  font-size: 12.5px;
}

.signin-rows div:last-child {
  border-bottom: 0;
}

.signin-rows dt {
  color: var(--academy-muted);
}

.signin-rows dd {
  margin: 0;
  overflow: hidden;
  color: var(--academy-ink);
  font-family: var(--signin-mono);
  font-size: 11px;
  text-align: right;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.signin-btn {
  display: inline-flex;
  width: 100%;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--academy-line);
  border-radius: 4px;
  background: transparent;
  color: var(--academy-ink);
  cursor: pointer;
  padding: 0 14px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.signin-btn:hover {
  border-color: var(--academy-accent);
}

.signin-btn.is-primary {
  border-color: var(--academy-accent);
  background: var(--academy-accent);
  color: #fff;
}

.signin-btn.is-primary:hover {
  border-color: var(--academy-accent-2);
  background: var(--academy-accent-2);
}

.signin-btn.is-quiet {
  min-height: 28px;
  justify-content: flex-start;
  border-color: transparent;
  color: var(--academy-muted);
  padding-left: 0;
}

.signin-btn.is-quiet:hover {
  border-color: transparent;
  color: var(--academy-accent);
}

.signin-btn:disabled,
.signin-change:disabled {
  cursor: wait;
  opacity: 0.55;
}

.signin-btn:focus-visible,
.signin-change:focus-visible,
.signin-mode:focus-visible {
  outline: 2px solid var(--academy-ink);
  outline-offset: 2px;
}

.signin-actions {
  display: grid;
  gap: 8px;
}

.signin-quiet-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.signin-quiet-row .signin-btn {
  width: auto;
}

.signin-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 4px 0;
  color: var(--academy-muted);
  font-family: var(--signin-mono);
  font-size: 10px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.signin-divider::before,
.signin-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--academy-line);
}

/* Finishing an email link: the address is the only thing to confirm. */
#entry.is-link [data-extra] {
  display: none;
}

.signin-note {
  margin: 0;
  color: var(--academy-muted);
  font-size: 11.5px;
  line-height: 1.5;
}

.signin-status {
  min-height: 1.5em;
  margin: 0;
  color: var(--academy-muted);
  font-size: 12.5px;
  line-height: 1.5;
}

.signin-status:empty {
  display: none;
}

.signin-status.is-error {
  color: var(--academy-coral);
}

.signin-foot {
  margin: 0;
  border-top: 1px solid var(--academy-line);
  padding-top: 12px;
  color: var(--academy-muted);
  font-size: 11.5px;
  line-height: 1.5;
}

.signin-foot a {
  color: var(--academy-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.signin-foot a:hover {
  color: var(--academy-accent-2);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .signin-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .signin-sheet {
    position: static;
    order: -1;
  }
}

@media (max-width: 640px) {
  .signin-main {
    padding: 12px 20px 40px;
  }

  .signin-body h1 {
    font-size: 28px;
  }

  .signin-field input {
    min-height: 44px;
    font-size: 16px;
  }

  .signin-btn:not(.is-quiet) {
    min-height: 44px;
    font-size: 14px;
  }
}