/* Shared course shell for Loop Lab simulators. */
:root {
  --sim-shell-bg: rgba(255, 251, 245, 0.94);
  --sim-shell-border: rgba(251, 146, 60, 0.28);
  --sim-shell-text: #172033;
  --sim-shell-muted: #607089;
  --sim-shell-accent: #ea580c;
  --sim-shell-cyan: #0e7490;
  --sim-shell-shadow: 0 18px 54px rgba(15, 23, 42, 0.14);
}

html.sim-course-enhanced {
  scroll-padding-bottom: 128px;
}

body.sim-course-page {
  padding-bottom: 202px;
}

.sim-course-shell {
  position: fixed;
  right: 18px;
  bottom: 18px;
  left: 18px;
  z-index: 2147483000;
  max-width: 1180px;
  margin: 0 auto;
  color: var(--sim-shell-text);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Microsoft YaHei",
    sans-serif;
  pointer-events: none;
}

.sim-course-shell * {
  box-sizing: border-box;
  letter-spacing: 0;
}

.sim-course-shell__panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(230px, 0.75fr) minmax(0, 1.4fr) minmax(230px, 0.72fr);
  gap: 12px;
  align-items: center;
  border: 1px solid var(--sim-shell-border);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), var(--sim-shell-bg)),
    var(--sim-shell-bg);
  box-shadow: var(--sim-shell-shadow);
  backdrop-filter: blur(18px) saturate(1.1);
  pointer-events: auto;
  overflow: hidden;
}

.sim-course-shell__panel::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--sim-shell-accent), #0284c7);
  transform: scaleX(var(--sim-progress, 0));
  transform-origin: 0 50%;
  transition: transform 140ms ease;
}

.sim-course-shell__summary,
.sim-course-shell__next {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
}

.sim-course-shell__eyebrow,
.sim-course-shell__next span,
.sim-course-link span {
  color: var(--sim-shell-cyan);
  font-size: 0.72rem;
  font-weight: 850;
  line-height: 1.2;
}

.sim-course-shell__title {
  margin: 0;
  color: var(--sim-shell-text);
  font-size: 0.98rem;
  font-weight: 850;
  line-height: 1.25;
}

.sim-course-shell__hint,
.sim-course-shell__status {
  margin: 0;
  color: var(--sim-shell-muted);
  font-size: 0.78rem;
  font-weight: 650;
  line-height: 1.35;
}

.sim-course-shell__resume {
  justify-self: start;
  max-width: 100%;
  margin: 2px 0 0;
  border: 1px solid rgba(234, 88, 12, 0.18);
  border-radius: 999px;
  padding: 3px 8px;
  background: rgba(255, 237, 213, 0.68);
  color: #9a3412;
  font-size: 0.7rem;
  font-weight: 820;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sim-course-shell__resume[hidden] {
  display: none;
}

.sim-course-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 10px 0;
}

.sim-course-link,
.sim-course-shell__next-link {
  display: grid;
  min-width: 0;
  color: inherit;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.sim-course-link {
  position: relative;
  gap: 3px;
  min-height: 48px;
  padding: 8px 10px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
  overflow: hidden;
}

.sim-course-link::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--sim-shell-accent), #0284c7);
  transform: scaleX(var(--sim-link-progress, 0));
  transform-origin: 0 50%;
  opacity: 0.56;
}

.sim-course-link strong {
  overflow: hidden;
  color: var(--sim-shell-text);
  font-size: 0.82rem;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sim-course-link em {
  color: var(--sim-shell-muted);
  font-size: 0.68rem;
  font-style: normal;
  font-weight: 780;
  line-height: 1.1;
}

.sim-course-link:hover,
.sim-course-link:focus-visible,
.sim-course-shell__next-link:hover,
.sim-course-shell__next-link:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(234, 88, 12, 0.42);
  background: rgba(255, 247, 237, 0.92);
  outline: none;
}

.sim-course-link.is-active {
  border-color: rgba(234, 88, 12, 0.5);
  background: linear-gradient(135deg, rgba(255, 237, 213, 0.96), rgba(224, 242, 254, 0.92));
}

.sim-course-link.is-done {
  border-color: rgba(22, 163, 74, 0.4);
}

.sim-course-link.is-done em {
  color: #166534;
}

.sim-course-link.has-resume:not(.is-active) {
  border-color: rgba(234, 88, 12, 0.34);
  background: rgba(255, 247, 237, 0.76);
}

.sim-course-shell__next {
  border-left: 1px solid rgba(148, 163, 184, 0.2);
}

.sim-course-shell__next-link {
  gap: 2px;
  border-radius: 8px;
  padding: 6px 8px;
}

.sim-course-shell__next-link strong {
  color: var(--sim-shell-text);
  font-size: 0.9rem;
}

.sim-course-shell__next-link em {
  color: var(--sim-shell-muted);
  font-size: 0.76rem;
  font-style: normal;
  line-height: 1.35;
}

.sim-course-learning {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: 12px;
  align-items: stretch;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  padding: 10px 14px 14px;
  background: rgba(255, 255, 255, 0.42);
}

.sim-course-learning__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.sim-course-learning__toggle {
  display: grid;
  gap: 3px;
  min-width: 0;
  min-height: 58px;
  border: 1px solid rgba(148, 163, 184, 0.32);
  border-radius: 8px;
  padding: 9px 10px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--sim-shell-text);
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.sim-course-learning__toggle span,
.sim-course-note > span {
  color: var(--sim-shell-text);
  font-size: 0.78rem;
  font-weight: 850;
  line-height: 1.2;
}

.sim-course-learning__toggle em,
.sim-course-note > span em {
  color: var(--sim-shell-muted);
  font-size: 0.68rem;
  font-style: normal;
  font-weight: 760;
  line-height: 1.2;
}

.sim-course-learning__toggle:hover,
.sim-course-learning__toggle:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(234, 88, 12, 0.42);
  background: rgba(255, 247, 237, 0.92);
  outline: none;
}

.sim-course-learning__toggle.is-active,
.sim-course-learning__toggle[aria-pressed="true"] {
  border-color: rgba(14, 116, 144, 0.46);
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.92), rgba(255, 247, 237, 0.9));
}

.sim-course-note {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.sim-course-note > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.sim-course-note textarea {
  width: 100%;
  min-height: 58px;
  max-height: 78px;
  resize: vertical;
  border: 1px solid rgba(148, 163, 184, 0.34);
  border-radius: 8px;
  padding: 9px 10px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--sim-shell-text);
  font: inherit;
  font-size: 0.78rem;
  line-height: 1.42;
  outline: none;
}

.sim-course-note textarea:focus {
  border-color: rgba(14, 116, 144, 0.48);
  box-shadow: 0 0 0 3px rgba(14, 116, 144, 0.12);
}

.sim-course-link.is-mastered {
  border-color: rgba(22, 163, 74, 0.42);
  background: rgba(240, 253, 244, 0.78);
}

.sim-course-link.needs-review {
  border-color: rgba(234, 88, 12, 0.42);
  background: rgba(255, 247, 237, 0.84);
}

.sim-course-link.has-note strong::after {
  content: " note";
  color: var(--sim-shell-cyan);
  font-size: 0.62rem;
  font-weight: 850;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  body.sim-course-page {
    padding-bottom: 286px;
  }

  .sim-course-shell {
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
  }

  .sim-course-shell__panel {
    grid-template-columns: 1fr;
    gap: 0;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 16px 16px 0 0;
  }

  .sim-course-shell__summary {
    padding: 11px 14px 8px;
  }

  .sim-course-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 7px;
    overflow: visible;
    padding: 0 14px 10px;
  }

  .sim-course-shell__next {
    display: none;
  }

  .sim-course-learning {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px 14px 12px;
  }

  .sim-course-link {
    min-height: 46px;
  }
}

@media (max-width: 760px) {
  body.sim-course-page {
    overflow-x: hidden;
  }

  body.sim-course-page--agent-loop [class*="flex-shrink-0"] {
    min-width: 0 !important;
  }

  body.sim-course-page--agent-loop [class*="justify-between"][class*="overflow-x-auto"][class*="pb-4"] {
    display: grid !important;
    grid-template-columns: repeat(4, minmax(0, 1fr)) !important;
    gap: 10px 6px !important;
    align-items: start !important;
    justify-content: normal !important;
    overflow: visible !important;
  }

  body.sim-course-page--agent-loop [class*="justify-between"][class*="overflow-x-auto"][class*="pb-4"] > [class*="flex-shrink-0"] {
    width: auto !important;
    max-width: 100% !important;
    justify-content: center !important;
  }

  body.sim-course-page--agent-loop [class*="justify-between"][class*="overflow-x-auto"][class*="pb-4"] [class*="w-8"][class*="h-0.5"][class*="mx-2"] {
    display: none !important;
  }

  body.sim-course-page--agent-loop [class*="w-8"][class*="h-0.5"][class*="mx-2"] {
    width: 10px !important;
    margin-left: 2px !important;
    margin-right: 2px !important;
  }

  body.sim-course-page--agent-loop button[class*="flex-col"][class*="items-center"] {
    min-width: 0 !important;
  }

  body.sim-course-page--agent-loop [class*="whitespace-nowrap"] {
    white-space: normal !important;
  }

  body.sim-course-page--agent-loop [class*="text-[13px]"][class*="mt-2"] {
    max-width: 54px !important;
    text-align: center !important;
    font-size: 10px !important;
    line-height: 1.15 !important;
    overflow-wrap: anywhere !important;
  }

  body.sim-course-page [class*="min-w-[720px]"] {
    width: 100% !important;
    min-width: 100% !important;
  }

  body.sim-course-page [class*="min-w-[158px]"] {
    width: auto !important;
    min-width: 0 !important;
  }

  body.sim-course-page [class*="overflow-x-auto"] {
    max-width: 100%;
  }

  body.sim-course-page--agent-trace [role="tablist"] {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    width: 100% !important;
  }

  body.sim-course-page--agent-trace [role="tab"] {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  body.sim-course-page--agent-trace [role="tab"] span {
    min-width: 0 !important;
  }

  body.sim-course-page--agent-trace [class*="shrink-0"][class*="rounded-md"][class*="border"] {
    flex: 1 1 128px !important;
  }
}

@media (max-width: 460px) {
  .sim-course-shell__title {
    font-size: 0.9rem;
  }

  .sim-course-shell__hint,
  .sim-course-shell__status {
    font-size: 0.72rem;
  }

  .sim-course-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .sim-course-learning__toggle {
    min-height: 50px;
    padding: 8px;
  }

  .sim-course-learning__toggle em {
    display: none;
  }

  .sim-course-note textarea {
    min-height: 50px;
    max-height: 58px;
  }
}