/* Canvas Daily — one hand-written stylesheet, the single source of styling.
   A student command center: navy structure, coral for urgency and primary
   actions, and the logo's magenta→indigo→blue checkmark gradient as the one
   signature accent. Mobile-first; the dashboard becomes a 3-column board on
   wide screens. */

:root {
  /* Brand, from the logo */
  --navy: #0d2750;
  --navy-700: #1c3a63;
  --navy-900: #081a36;
  --coral: #f5824f;
  --coral-strong: #ef6b34;
  --grad: linear-gradient(90deg, #c0428f 0%, #6a4bd4 50%, #2f6fed 100%);

  /* Surfaces */
  --bg: #eef2f9;
  --bg-2: #f6f8fc;
  --surface: #ffffff;
  --border: #e3e9f2;
  --border-strong: #d3dcea;
  --ink: #0d2750;
  --muted: #5b6b85;
  --faint: #8b99b0;

  /* Urgency families */
  --past-fg: #c0392b;
  --past-bg: #fef2f2;
  --past-br: #f7c9c2;

  --today-fg: #c2570c;
  --today-bg: #fff6ec;
  --today-br: #fbd7ad;

  --soon-fg: #1f6f5c;
  --soon-bg: #eefaf4;
  --soon-br: #bfe7d6;

  --done-fg: #2b6cb0;
  --done-bg: #eef5fd;
  --done-br: #c5ddf6;

  /* Scale */
  --radius: 14px;
  --radius-lg: 20px;
  --radius-sm: 9px;
  --shadow-sm: 0 1px 2px rgba(13, 39, 80, .05), 0 1px 3px rgba(13, 39, 80, .04);
  --shadow: 0 6px 18px rgba(13, 39, 80, .07), 0 2px 6px rgba(13, 39, 80, .04);
  --shadow-lg: 0 20px 48px rgba(13, 39, 80, .14);
  --space: 20px;

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --display: "Space Grotesk", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font: 16px/1.6 var(--sans);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--display); color: var(--navy); letter-spacing: -.01em; }

a { color: var(--done-fg); text-decoration: none; }
a:hover { text-decoration: underline; }

.eyebrow {
  font: 700 .72rem/1 var(--mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--coral-strong);
  margin: 0 0 .6rem;
}

/* The signature: the logo's checkmark gradient as a hairline rule. */
.brand-rule { height: 3px; background: var(--grad); }

/* ---- Top bar --------------------------------------------------------- */

.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }

.topbar__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.topbar__logo { display: inline-flex; }
.topbar__logo img { height: 72px; width: auto; display: block; }

.topbar__inner { position: relative; }

.topbar__toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--navy);
  cursor: pointer;
}

.topbar__nav {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  flex-direction: column;
  align-items: stretch;
  gap: .2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: .6rem 24px 1rem;
  z-index: 20;
}
.topbar__nav--open { display: flex; }
.topbar__nav form { display: block; margin: 0; }
.topbar__nav .btn { width: 100%; }

@media (min-width: 720px) {
  .topbar__toggle { display: none; }
  .topbar__nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    margin-left: auto;
    gap: .35rem;
    background: none;
    border: 0;
    box-shadow: none;
    padding: 0;
  }
  .topbar__nav form { display: inline; }
  .topbar__nav .btn { width: auto; }
}

.navlink {
  font-weight: 600;
  font-size: .92rem;
  color: var(--muted);
  padding: .5rem .7rem;
  border-radius: var(--radius-sm);
}
.navlink:hover { color: var(--navy); background: var(--bg-2); text-decoration: none; }

/* ---- Layout ---------------------------------------------------------- */

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 72px;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.1rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--muted);
}
.back-link:hover { color: var(--navy); text-decoration: none; }

/* ---- Buttons --------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  font: 600 .95rem/1.2 var(--sans);
  padding: .68rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background .14s ease, border-color .14s ease, color .14s ease, transform .1s ease, box-shadow .14s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn--sm { padding: .45rem .8rem; font-size: .88rem; }

.btn--primary { background: var(--navy); color: #fff; }
.btn--primary:hover { background: var(--navy-700); color: #fff; box-shadow: var(--shadow-sm); }

.btn--accent { background: var(--coral); color: #fff; box-shadow: 0 6px 16px rgba(239, 107, 52, .28); }
.btn--accent:hover { background: var(--coral-strong); color: #fff; }

.btn--ghost { background: var(--surface); border-color: var(--border-strong); color: var(--navy); }
.btn--ghost:hover { border-color: var(--navy); color: var(--navy); }

/* ---- Hero command bar ------------------------------------------------ */

.hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 28px;
}

.hero__head {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
}

.hero__title { font-size: 1.9rem; line-height: 1.1; margin: 0 0 .5rem; }
.hero__sub { color: var(--muted); margin: 0; max-width: 60ch; }

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.stat {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: hidden;
}
.stat::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
}
.stat--past::before { background: var(--past-fg); }
.stat--today::before { background: var(--today-fg); }
.stat--soon::before { background: var(--soon-fg); }
.stat--courses::before { background: var(--grad); }

.stat__num { font: 700 2rem/1 var(--display); color: var(--navy); }
.stat--past .stat__num { color: var(--past-fg); }
.stat--today .stat__num { color: var(--today-fg); }
.stat__label {
  font: 600 .72rem/1.2 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---- Board ----------------------------------------------------------- */

.board { display: grid; gap: 20px; align-items: start; }

.column {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.column__head {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 14px;
  padding: 2px 4px;
}
.column__title { margin: 0; font-size: 1rem; }
.column__count {
  margin-left: auto;
  font: 700 .8rem/1 var(--mono);
  color: var(--faint);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .3rem .55rem;
}

.chip {
  display: inline-block;
  font: 700 .72rem/1 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .4rem .6rem;
  border-radius: 999px;
  border: 1px solid;
}
.chip--past  { color: var(--past-fg);  background: var(--past-bg);  border-color: var(--past-br); }
.chip--today { color: var(--today-fg); background: var(--today-bg); border-color: var(--today-br); }
.chip--soon  { color: var(--soon-fg);  background: var(--soon-bg);  border-color: var(--soon-br); }

/* ---- Assignment cards ------------------------------------------------ */

.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .12s ease, box-shadow .14s ease, border-color .14s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--border-strong);
}

.card__top { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }

.card__title { margin: 0; font-size: 1.05rem; line-height: 1.25; font-family: var(--sans); font-weight: 600; }
.card__title a { color: var(--navy); }
.card__title a:hover { color: var(--done-fg); text-decoration: none; }

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

.card__actions {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: 12px;
}

.due { font: 600 .8rem/1.3 var(--mono); color: var(--muted); }

.card__open {
  font: 600 .82rem/1 var(--sans);
  color: var(--done-fg);
}
.card__open:hover { color: var(--navy); text-decoration: none; }

/* Badges + course pill */
.badge {
  font: 700 .66rem/1 var(--mono);
  letter-spacing: .07em;
  text-transform: uppercase;
  padding: .32rem .5rem;
  border-radius: 6px;
  border: 1px solid;
}
.badge--past   { color: var(--past-fg);  background: var(--past-bg);  border-color: var(--past-br); }
.badge--today  { color: var(--today-fg); background: var(--today-bg); border-color: var(--today-br); }
.badge--soon   { color: var(--soon-fg);  background: var(--soon-bg);  border-color: var(--soon-br); }
.badge--danger { color: #fff; background: var(--past-fg); border-color: var(--past-fg); }
.badge--done   { color: var(--done-fg);  background: var(--done-bg);  border-color: var(--done-br); }

.course-pill {
  margin-left: auto;
  font: 600 .75rem/1 var(--sans);
  color: var(--muted);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .32rem .6rem;
}
.course-pill--lg { margin-left: 0; font-size: .85rem; padding: .42rem .8rem; }

.tag {
  font: 600 .72rem/1 var(--sans);
  border-radius: 999px;
  padding: .3rem .55rem;
  letter-spacing: .02em;
}
.tag--quiz {
  color: var(--coral);
  background: rgba(239, 107, 52, .12);
  border: 1px solid rgba(239, 107, 52, .35);
}

.card__class {
  margin: .2rem 0 0;
  font: 600 .78rem/1.2 var(--sans);
  color: var(--muted);
}

.weekgroup { border-top: 1px solid var(--border); }
.weekgroup:first-of-type { border-top: 0; }
.weekgroup__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
  padding: .6rem 0;
  font: 600 .9rem/1 var(--sans);
  color: var(--navy);
}
.weekgroup__summary::-webkit-details-marker { display: none; }
.weekgroup__count { color: var(--muted); font-size: .82rem; }
.weekgroup .cards { margin: 0 0 .6rem; }

.board__completed summary { cursor: pointer; }

/* ---- Empty states ---------------------------------------------------- */

.empty {
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 22px 16px;
  text-align: center;
}
.empty__title { margin: 0 0 .25rem; font-weight: 700; color: var(--navy); font-family: var(--display); }
.empty__sub { margin: 0; color: var(--muted); font-size: .88rem; }

/* ---- Detail: mission brief ------------------------------------------- */

.brief {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 22px;
}
.brief--tight { padding: 24px 28px; }
.brief__title { font-size: 1.85rem; line-height: 1.15; margin: 0 0 .9rem; }
.brief__tags { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin-bottom: 1.2rem; }
.brief--tight .brief__title { margin-bottom: 0; }

.metagrid {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.metacard {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.metacard__label {
  font: 600 .68rem/1 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--faint);
}
.metacard__value { font-weight: 600; color: var(--navy); word-break: break-word; }

/* ---- Panels (instructions, breakdown, settings) ---------------------- */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 24px 26px;
  margin-bottom: 22px;
}
.panel--muted { background: var(--bg-2); box-shadow: none; }
.panel__head { display: flex; align-items: center; gap: .6rem; margin-bottom: 14px; }
.panel__title { margin: 0; font-size: 1.1rem; }
.panel__lead { color: var(--muted); margin: 0 0 1.2rem; }

.prose :first-child { margin-top: 0; }
.prose :last-child { margin-bottom: 0; }
.prose img { max-width: 100%; height: auto; }
.prose a { word-break: break-word; }

.checklist { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.checklist li { position: relative; padding-left: 1.7rem; color: var(--muted); }
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0; top: -1px;
  font-weight: 700;
  color: #fff;
  background: var(--grad);
  width: 1.15rem; height: 1.15rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: .7rem;
}

/* ---- Breakdown ------------------------------------------------------- */

.spinner {
  width: .9rem;
  height: .9rem;
  border-radius: 999px;
  border: 2px solid rgba(239, 107, 52, .35);
  border-top-color: var(--coral);
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.notice {
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  border: 1px solid var(--today-br);
  background: var(--today-bg);
  color: var(--today-fg);
  font-weight: 500;
}

/* ---- Breakdown modal ------------------------------------------------- */

.brief__actions { display: flex; flex-wrap: wrap; gap: .7rem; margin: 0; }

.modal {
  width: min(640px, 92vw);
  max-height: 85vh;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 0;
  color: var(--ink);
  background: var(--surface);
  overflow: hidden;
}
.modal::backdrop { background: rgba(16, 24, 40, .45); }
.modal[open] { display: flex; flex-direction: column; }

.modal__head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.modal__eyebrow { margin: 0; font-weight: 600; color: var(--navy); }
.modal__actions { display: flex; align-items: center; gap: .5rem; }
.modal__close {
  border: 0; background: transparent; cursor: pointer;
  font-size: 1.1rem; line-height: 1; color: var(--muted); padding: .2rem;
}
.modal__close:hover { color: var(--ink); }

.modal__body { padding: 20px; overflow-y: auto; }
.modal__loading { display: flex; align-items: center; gap: .6rem; color: var(--muted); }

.breakdown-cards { display: grid; gap: 16px; }
.section-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-2);
  padding: 14px 16px;
}
.section-card__title { margin: 0 0 .5rem; font-size: 1rem; color: var(--navy); }
.section-card__body p { margin: .25rem 0; line-height: 1.6; }

/* ---- Settings -------------------------------------------------------- */

.settings-grid { display: grid; gap: 20px; }

/* ---- Forms ----------------------------------------------------------- */

.form { display: grid; gap: 1.05rem; margin: 0; }
.field { display: grid; gap: .35rem; }

label { font-weight: 600; font-size: .85rem; color: var(--navy); }

input, select {
  width: 100%;
  font: inherit;
  padding: .72rem .85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink);
  transition: border-color .14s ease, box-shadow .14s ease;
}
input::placeholder { color: var(--faint); }
input:focus, select:focus {
  outline: none;
  border-color: var(--coral);
  box-shadow: 0 0 0 3px rgba(245, 130, 79, .2);
}

.field__hint { font-size: .8rem; color: var(--muted); }

/* Ask My Course: keep the question box and Ask button from sitting on top of
   each other — full-width input, button on its own line below with breathing room. */
.ask-form { display: grid; gap: .7rem; justify-items: start; margin: 1rem 0; }
.ask-form .btn { width: auto; }

/* Ask My Course picker: account selector + hidden-courses disclosure. */
.account-picker { display: grid; gap: .35rem; justify-items: start; margin: 0 0 1.2rem; max-width: 28rem; }
.hidden-courses { margin-top: 1.5rem; }
.hidden-courses summary { cursor: pointer; font-weight: 600; color: var(--muted); }
.course-list--hidden li { display: flex; align-items: center; justify-content: space-between; gap: .75rem; }
.course-list--hidden form { margin: 0; }

.error {
  color: var(--past-fg);
  background: var(--past-bg);
  border: 1px solid var(--past-br);
  border-left: 4px solid var(--past-fg);
  border-radius: var(--radius-sm);
  padding: .7rem .9rem;
  font-size: .9rem;
  font-weight: 500;
  margin: 0;
}

/* ---- Login / signup gate -------------------------------------------- */

.gate { min-height: 100vh; display: grid; }

.gate__brand {
  background: radial-gradient(120% 120% at 0% 0%, var(--navy-700) 0%, var(--navy) 55%, var(--navy-900) 100%);
  color: #fff;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
}
.gate__brand .brand-rule { position: absolute; left: 0; right: 0; bottom: 0; }
.gate__brand-inner { max-width: 460px; text-align: center; }
.gate__logo {
  display: inline-flex;
  background: #fff;
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 28px;
}
.gate__logo img { height: 88px; width: auto; display: block; }
.gate__headline { color: #fff; font-size: 2.6rem; line-height: 1.1; margin: 0 0 .9rem; }
.gate__pitch { color: #c7d3e6; font-size: 1.18rem; margin: 0; }

.gate__panel { display: grid; place-items: center; padding: 40px 24px; background: var(--bg); }
.gate__card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
}
.gate__title { font-size: 1.6rem; margin: 0 0 .35rem; }
.gate__sub { color: var(--muted); margin: 0 0 1.5rem; }
.gate__card .btn { width: 100%; }
.gate__alt { text-align: center; color: var(--muted); margin: 1.3rem 0 0; font-size: .92rem; }

/* ---- Accessibility --------------------------------------------------- */

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
.btn:focus-visible,
.card__title a:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .card:hover, .btn:active { transform: none; }
}

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

@media (min-width: 720px) {
  .stats { grid-template-columns: repeat(4, 1fr); }
  .metagrid { grid-template-columns: repeat(3, 1fr); }
  .settings-grid { grid-template-columns: 1.4fr 1fr; align-items: start; }
}

@media (min-width: 980px) {
  .board { grid-template-columns: repeat(3, 1fr); }
  .hero__title { font-size: 2.2rem; }
  .brief__title { font-size: 2.1rem; }
  .gate { grid-template-columns: 1.05fr 1fr; }
}

/* ---- Syncing dots (live course-content sync notice) ----------------- */
.sync-dots { display: inline-flex; gap: .28em; margin-left: .5em; vertical-align: middle; }
.sync-dots span {
  width: .42em; height: .42em; border-radius: 50%;
  background: var(--coral); display: inline-block;
  animation: sync-bounce 1.1s ease-in-out infinite;
}
.sync-dots span:nth-child(2) { animation-delay: .18s; }
.sync-dots span:nth-child(3) { animation-delay: .36s; }
@keyframes sync-bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: .45; }
  40% { transform: translateY(-.35em); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .sync-dots span { animation: sync-fade 1.1s ease-in-out infinite; }
  @keyframes sync-fade { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
}