/* Application shell + generic layout primitives.
   Layout containers are TRANSPARENT by design - only visual surfaces
   (.card and friends) receive a background. */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100dvh;
}

.app__main {
  position: relative;
  min-width: 0;
  overflow-x: clip;
}

.main-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--section-gap);
  max-width: calc(var(--content-max) + var(--main-pad-x) * 2);
  padding: var(--main-pad-top) var(--main-pad-x) var(--main-pad-bottom);
}

.page {
  display: flex;
  flex-direction: column;
  gap: var(--section-gap);
  min-width: 0;
  outline: none;
}

.page > * {
  min-width: 0;
}

/* Decorative radial glow behind the dashboard (Figma "Ellipse", 620px). */
.page-glow {
  position: absolute;
  top: -260px;
  left: 532px;
  width: 620px;
  height: 620px;
  pointer-events: none;
  z-index: 0;
}

.page-glow img {
  width: 100%;
  height: 100%;
}

.main-inner > * {
  position: relative;
  z-index: 1;
}

.main-inner > .page-glow {
  position: absolute;
  z-index: 0;
}

/* ---- Section heading ---------------------------------------------------- */
.section-heading {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.section-heading__title {
  font-size: var(--fs-22);
  font-weight: 700;
}

.section-heading__sub {
  font-size: var(--fs-12);
  color: var(--text-muted);
  max-width: 760px;
}

.section-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.section-head-row__title {
  font-size: var(--fs-20);
  font-weight: 700;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.pill-row--lg {
  gap: 10px;
}

/* ---- Grids -------------------------------------------------------------- */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.grid-days {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.grid-lower {
  display: grid;
  grid-template-columns: minmax(0, 720fr) minmax(0, 392fr);
  gap: 16px;
}

.grid-lesson {
  display: grid;
  grid-template-columns: minmax(0, 350fr) minmax(0, 760fr);
  gap: 18px;
  align-items: start;
}

.grid-lab {
  display: grid;
  grid-template-columns: minmax(0, 400fr) minmax(0, 710fr);
  gap: 18px;
  align-items: start;
}

.grid-resources {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.stack--sm {
  gap: var(--sp-2);
}

.stack--lg {
  gap: var(--sp-6);
}

.row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

/* ---- Skip link + scrim --------------------------------------------------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  font-size: var(--fs-12);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

.scrim {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: var(--overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) ease, visibility var(--dur-med);
}

.scrim[data-visible="true"] {
  opacity: 1;
  visibility: visible;
}

/* ---- Empty / error / loading states -------------------------------------- */
.state-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-6);
  border-radius: var(--r-3xl);
  background: var(--surface-primary);
  border: 1px solid var(--border-primary);
}

.state-box__title {
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--text-title);
}

.state-box__text {
  font-size: var(--fs-13);
  color: var(--text-muted);
  max-width: 640px;
}

.state-box--error {
  background: var(--callout-danger-bg);
  border-color: var(--callout-danger-border);
}

.state-box--error .state-box__title {
  color: var(--callout-danger-label);
}

.state-box__detail {
  font-family: var(--font-mono);
  font-size: var(--fs-11);
  color: var(--callout-danger-text);
  white-space: pre-wrap;
  word-break: break-word;
}

.boot-screen {
  display: grid;
  place-items: center;
  min-height: 100vh;
  color: var(--text-muted);
  font-size: var(--fs-13);
}

.banner {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: 12px 16px;
  border-radius: var(--r-lg);
  font-size: var(--fs-12);
  background: var(--callout-warn-bg);
  border: 1px solid var(--callout-warn-border);
  color: var(--callout-warn-text);
}

:root[data-theme="light"] .page-glow {
  opacity: 0.3;
}