:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #697386;
  --line: #dfe5ee;
  --paper: #fbfcfe;
  --panel: #ffffff;
  --teal: #0f766e;
  --teal-soft: #e5f5f2;
  --blue: #2563eb;
  --amber: #eab308;
  --red: #b42318;
  --shadow: 0 18px 50px rgba(39, 55, 77, 0.12);
}

body.dark-mode {
  color-scheme: dark;
  --ink: #edf3f8;
  --muted: #a7b4c6;
  --line: #2d3b4d;
  --paper: #132031;
  --panel: #101b2a;
  --teal: #5eead4;
  --teal-soft: rgba(20, 184, 166, 0.16);
  --blue: #8bb2ff;
  --amber: #facc15;
  --red: #f87171;
  --shadow: 0 18px 55px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(115deg, rgba(15, 118, 110, 0.08), transparent 36%),
    linear-gradient(180deg, #eef4f8 0%, #f8fafc 42%, #edf2f7 100%);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.dark-mode {
  background:
    radial-gradient(circle at 14% 14%, rgba(20, 184, 166, 0.12), transparent 28%),
    radial-gradient(circle at 82% 22%, rgba(37, 99, 235, 0.12), transparent 26%),
    linear-gradient(180deg, #08111f 0%, #0b1422 48%, #101827 100%);
}

body.show-welcome .app-shell {
  display: none;
}

body.show-dashboard .welcome-screen {
  display: none;
}

body.app-loading .welcome-screen,
body.app-loading .app-shell {
  visibility: hidden;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.58;
}

[hidden] {
  display: none !important;
}

.theme-toggle {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  border: 1px solid rgba(223, 229, 238, 0.9);
  border-radius: 8px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(39, 55, 77, 0.12);
  backdrop-filter: blur(18px);
  font-weight: 900;
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

body.dark-mode .theme-toggle {
  border-color: rgba(94, 234, 212, 0.28);
  background: rgba(16, 27, 42, 0.86);
}

.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 18% 18%, rgba(37, 99, 235, 0.12), transparent 28%),
    linear-gradient(115deg, rgba(15, 118, 110, 0.16), transparent 42%),
    linear-gradient(180deg, #eef4f8 0%, #f8fafc 48%, #edf2f7 100%);
}

body.dark-mode .loading-screen {
  background:
    radial-gradient(circle at 18% 18%, rgba(94, 234, 212, 0.12), transparent 28%),
    linear-gradient(115deg, rgba(37, 99, 235, 0.12), transparent 42%),
    linear-gradient(180deg, #08111f 0%, #0b1422 48%, #101827 100%);
}

body:not(.app-loading) .loading-screen {
  display: none;
}

.loading-card {
  position: relative;
  width: min(520px, 100%);
  padding: 28px;
  border: 1px solid rgba(223, 229, 238, 0.95);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  overflow: hidden;
}

body.dark-mode .loading-card,
body.dark-mode .welcome-preview,
body.dark-mode .date-card,
body.dark-mode .auth-card,
body.dark-mode .panel {
  border-color: rgba(45, 59, 77, 0.95);
  background: rgba(16, 27, 42, 0.88);
}

.loading-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent, rgba(15, 118, 110, 0.08), transparent);
  transform: translateX(-100%);
  animation: loading-sheen 2.4s ease-in-out infinite;
}

.loading-card > * {
  position: relative;
  z-index: 1;
}

.loading-card h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 4.4rem);
  line-height: 0.95;
}

.loading-copy {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.04rem;
  font-weight: 700;
  min-height: 3.2em;
}

.loading-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border: 1px solid rgba(15, 118, 110, 0.22);
  border-radius: 50%;
  background: var(--teal-soft);
}

.loading-mark span {
  width: 24px;
  height: 24px;
  border: 4px solid #ccebe5;
  border-top-color: var(--teal);
  border-radius: 50%;
  animation: loading-spin 0.8s linear infinite;
}

.loading-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.loading-pills span {
  padding: 7px 10px;
  border-radius: 8px;
  background: var(--paper);
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

@keyframes loading-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes loading-sheen {
  0% {
    transform: translateX(-100%);
  }
  55%,
  100% {
    transform: translateX(100%);
  }
}

.app-shell {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 28px;
}

.welcome-screen {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  align-items: center;
  gap: 42px;
  width: min(1180px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 40px 28px;
}

.brand-domain {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.86rem;
  font-weight: 900;
  text-transform: uppercase;
}

.welcome-copy h1 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(3rem, 8vw, 7.5rem);
  line-height: 0.88;
}

.welcome-text {
  max-width: 620px;
  margin: 24px 0 0;
  color: #45556d;
  font-size: clamp(1rem, 2vw, 1.35rem);
  line-height: 1.5;
}

body.dark-mode .welcome-text {
  color: #c2cede;
}

.welcome-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.welcome-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.welcome-badges span {
  padding: 8px 10px;
  border: 1px solid rgba(15, 118, 110, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

body.dark-mode .welcome-badges span {
  border-color: rgba(94, 234, 212, 0.22);
  background: rgba(94, 234, 212, 0.08);
}

.google-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 900;
}

body.dark-mode .google-button {
  border-color: #edf3f8;
  background: #edf3f8;
  color: #08111f;
}

body.dark-mode .ghost-button,
body.dark-mode .icon-button,
body.dark-mode .text-button,
body.dark-mode .primary-button {
  border-color: var(--line);
  background: #132031;
  color: var(--ink);
}

body.dark-mode .primary-button {
  background: #0f766e;
  color: #fff;
}

.google-button {
  border: 1px solid #111827;
  background: #111827;
  color: #fff;
}

.ghost-button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
}

.welcome-preview {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 20px;
  border: 1px solid rgba(223, 229, 238, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.welcome-preview::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(125deg, transparent 0 38%, rgba(15, 118, 110, 0.08) 48%, transparent 58% 100%);
  transform: translateX(-70%);
  animation: preview-sheen 4.8s ease-in-out infinite;
  pointer-events: none;
}

.welcome-preview > * {
  position: relative;
  z-index: 1;
}

.welcome-preview:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 70px rgba(39, 55, 77, 0.16);
}

.preview-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.preview-top span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.preview-top strong {
  display: block;
  margin-top: 4px;
  font-size: 1rem;
}

.preview-now {
  min-width: 76px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  text-align: left;
}

body.dark-mode .preview-now,
body.dark-mode .preview-row,
body.dark-mode .empty-state,
body.dark-mode input,
body.dark-mode select,
body.dark-mode .lesson-detail {
  background: #132031;
  border-color: var(--line);
}

.preview-now strong {
  color: var(--teal);
  font-size: 1.25rem;
}

.preview-current,
.preview-row,
.preview-card {
  transition: transform 0.18s ease, border-color 0.18s ease;
}

body.dark-mode .preview-card,
body.dark-mode .homework-due-next-week {
  background: rgba(34, 197, 94, 0.12);
}

body.dark-mode .lesson,
body.dark-mode .mini-lesson,
body.dark-mode .homework,
body.dark-mode .day-toggle,
body.dark-mode .stat {
  border-color: var(--line);
  background: #132031;
}

body.dark-mode .lesson.prep-due,
body.dark-mode .mini-lesson.prep-due {
  background: rgba(250, 204, 21, 0.08);
}

body.dark-mode .homework-due-this-week,
body.dark-mode .stat-due-this-week {
  background: rgba(37, 99, 235, 0.14);
}

body.dark-mode .homework-no-due-date,
body.dark-mode .homework.no-date,
body.dark-mode .stat-no-due-date {
  background: rgba(250, 204, 21, 0.1);
}

body.dark-mode .homework-missing,
body.dark-mode .stat-missing {
  background: rgba(248, 113, 113, 0.13);
}

body.dark-mode .homework-due-later,
body.dark-mode .stat-due-later {
  background: rgba(216, 180, 254, 0.13);
}

body.dark-mode .stat-due-next-week {
  background: rgba(34, 197, 94, 0.12);
}

.preview-current:hover,
.preview-row:hover,
.preview-card:hover {
  transform: translateX(4px);
}

.preview-current {
  position: relative;
  display: grid;
  gap: 6px;
  min-height: 108px;
  padding: 16px;
  border-radius: 8px;
  background: #102a43;
  color: #fff;
  overflow: hidden;
}

.preview-current::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 58%;
  background: linear-gradient(90deg, rgba(20, 184, 166, 0.32), rgba(34, 197, 94, 0.18));
  animation: preview-progress 5.2s ease-in-out infinite alternate;
}

.preview-current > * {
  position: relative;
  z-index: 1;
}

.preview-current span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.preview-current strong {
  font-size: 1.45rem;
}

.preview-current p,
.preview-card p,
.preview-row p {
  margin: 0;
  color: var(--muted);
}

.preview-current p {
  color: rgba(255, 255, 255, 0.82);
}

.preview-row {
  display: grid;
  grid-template-columns: auto 112px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-height: 64px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.preview-row span {
  padding: 4px 8px;
  border-radius: 8px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 0.76rem;
  font-weight: 900;
}

.preview-row strong {
  color: var(--muted);
}

.preview-row.blue {
  border-left: 5px solid var(--blue);
}

.preview-row.green {
  border-left: 5px solid var(--teal);
}

.preview-card {
  display: grid;
  gap: 8px;
  padding: 16px;
  border-radius: 8px;
  background: #f0fdf4;
  border-left: 5px solid #16a34a;
}

.preview-card span {
  width: fit-content;
  padding: 6px 9px;
  border-radius: 8px;
  background: #eaf1ff;
  color: #1d4ed8;
  font-weight: 900;
}

@keyframes preview-sheen {
  0%,
  42% {
    transform: translateX(-70%);
  }
  72%,
  100% {
    transform: translateX(70%);
  }
}

@keyframes preview-progress {
  from {
    width: 42%;
  }
  to {
    width: 68%;
  }
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  align-items: center;
  gap: 18px;
  min-height: 116px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(2.1rem, 5vw, 4.7rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 1.15rem;
}

.date-card,
.period-card,
.auth-card,
.panel {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(223, 229, 238, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.header-actions {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) minmax(92px, 0.7fr) minmax(170px, max-content);
  align-items: stretch;
  gap: 12px;
  width: 100%;
  min-width: 0;
}

.date-card {
  display: grid;
  gap: 4px;
  min-width: 0;
  padding: 18px 20px;
  border-radius: 8px;
}

.auth-card {
  display: grid;
  gap: 5px;
  justify-items: start;
  min-width: 0;
  padding: 14px;
  border-radius: 8px;
}

.date-card span {
  color: var(--muted);
  font-size: 0.88rem;
}

.auth-card span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.date-card strong {
  font-size: 1.25rem;
}

.date-card time {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.period-card {
  min-width: 0;
}

.period-card strong {
  color: var(--teal);
  font-size: 1.55rem;
  line-height: 1;
}

.auth-card strong {
  font-size: 0.96rem;
}

.auth-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(124px, 1fr));
  gap: 8px;
  margin-top: 4px;
}

.auth-buttons .text-button {
  min-width: 0;
  white-space: nowrap;
}

.dashboard {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  gap: 18px;
}

.panel {
  border-radius: 8px;
  padding: 20px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.today-panel,
.homework-panel {
  display: flex;
  flex-direction: column;
  height: 625px;
  min-height: 0;
  overflow: hidden;
}

.timetable-panel {
  grid-column: 1 / -1;
}

.icon-button,
.text-button,
.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.icon-button {
  width: 40px;
  padding: 0;
}

.icon-button svg,
.text-button svg {
  width: 18px;
  height: 18px;
}

.text-button,
.primary-button {
  gap: 8px;
  padding: 0 14px;
  font-weight: 700;
}

.primary-button {
  border-color: var(--teal);
  background: var(--teal);
  color: white;
}

.danger {
  color: var(--red);
}

.now-card {
  position: relative;
  display: grid;
  gap: 8px;
  min-height: 136px;
  margin-bottom: 14px;
  padding: 18px;
  border-radius: 8px;
  background: #102a43;
  color: white;
  overflow: hidden;
}

.now-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--lesson-progress, 0%);
  background: linear-gradient(90deg, rgba(20, 184, 166, 0.26), rgba(34, 197, 94, 0.18));
  opacity: 0;
  pointer-events: none;
  transition: width 0.6s ease, opacity 0.2s ease;
}

.now-card.has-progress::before {
  opacity: 1;
}

.now-card > * {
  position: relative;
  z-index: 1;
}

.now-card.current-progress {
  border: 1px solid var(--line);
  background: #102a43;
  color: white;
}

.now-card.empty {
  background: var(--teal-soft);
  color: var(--ink);
}

.now-label {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.empty .now-label {
  color: var(--teal);
}

.current-progress .now-label {
  color: var(--teal);
}

.now-card strong {
  font-size: 1.65rem;
  line-height: 1.1;
}

.now-prep {
  width: fit-content;
  max-width: 100%;
  padding: 6px 9px;
  border-radius: 8px;
  background: #fef3c7;
  color: #7c2d12;
  font-size: 0.82rem;
  font-weight: 900;
}

.lesson-list,
.homework-list {
  display: grid;
  gap: 10px;
}

.lesson-list {
  height: 360px;
  min-height: 360px;
  max-height: 360px;
  overflow-y: auto;
  padding-right: 4px;
  align-content: start;
}

.up-next-label {
  position: sticky;
  top: 0;
  z-index: 2;
  margin: 0;
  padding: 6px 0;
  color: var(--teal);
  background: rgba(255, 255, 255, 0.92);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.homework-list {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-height: 0;
  margin-top: 10px;
  overflow-y: auto;
  padding-right: 4px;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scroll-snap-type: y mandatory;
}

.lesson,
.homework {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.lesson {
  position: relative;
  grid-template-columns: 145px minmax(0, 1fr) 22px;
  align-items: center;
  min-height: 68px;
  width: 100%;
  color: inherit;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
}

.lesson::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--lesson-progress, 0%);
  background:
    radial-gradient(circle at 18px 50%, rgba(255, 255, 255, 0.44), transparent 22px),
    linear-gradient(90deg, rgba(20, 184, 166, 0.24), rgba(34, 197, 94, 0.16));
  opacity: 0;
  pointer-events: none;
  transition: width 0.6s ease, opacity 0.2s ease;
}

.lesson.has-progress::before {
  opacity: 1;
}

.lesson > *,
.mini-lesson > * {
  position: relative;
  z-index: 1;
}

.lesson:hover {
  border-color: var(--teal);
}

.lesson > svg {
  width: 18px;
  height: 18px;
  color: var(--muted);
}

.lesson.prep-due,
.mini-lesson.prep-due {
  border-color: rgba(180, 83, 9, 0.36);
  background: #fff8ed;
}

.lesson-time {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  white-space: nowrap;
}

.lesson-time,
.lesson-title,
.lesson-meta {
  line-height: 1.25;
}

.lesson-time strong {
  display: inline-flex;
  width: fit-content;
  padding: 3px 7px;
  border-radius: 8px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 0.72rem;
}

.lesson-title,
.homework-title {
  margin: 0;
  font-weight: 800;
}

.lesson-title,
.lesson-meta {
  overflow-wrap: anywhere;
}

.lesson-meta,
.homework-meta {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.prep-note {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  margin: 7px 0 0;
  padding: 5px 8px;
  border-radius: 8px;
  background: #fef3c7;
  color: #7c2d12;
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1.25;
}

.homework {
  border-left: 5px solid var(--blue);
  flex: 0 0 auto;
  align-content: start;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.homework:last-child {
  scroll-snap-align: end;
}

.homework-due-this-week {
  border-left-color: var(--blue);
  background: #eff6ff;
}

.homework-due-next-week {
  border-left-color: #16a34a;
  background: #f0fdf4;
}

.homework-due-later {
  border-left-color: #c026d3;
  background: #fae8ff;
}

.homework-missing {
  border-left-color: var(--red);
  background: #fee4e2;
}

.homework-no-due-date {
  border-left-color: var(--amber);
  background: #fffbea;
}

.homework.late {
  border-left-color: var(--red);
}

.homework.missing {
  border-left-color: var(--red);
}

.homework.no-date {
  border-left-color: var(--amber);
  background: #fffbea;
}

.homework-status {
  display: inline-flex;
  width: fit-content;
  margin: 0;
  padding: 7px 10px;
  border-radius: 8px;
  background: #eaf1ff;
  color: #1d4ed8;
  font-size: 0.82rem;
  font-weight: 900;
}

.homework-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.homework-due-context {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
  text-align: right;
}

.homework.missing .homework-status {
  background: var(--red);
  color: #fff;
}

.homework.no-date .homework-status {
  background: #fef3c7;
  color: #854d0e;
}

.homework a {
  color: var(--blue);
  font-weight: 800;
  text-decoration: none;
}

.homework-summary {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}

.homework-message {
  margin-bottom: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--amber);
  border-radius: 8px;
  background: #fffbea;
  color: #854d0e;
  font-size: 0.9rem;
  font-weight: 700;
}

.tour-copy {
  color: var(--muted);
  line-height: 1.5;
}

.stat {
  appearance: none;
  border: 1px solid var(--line);
  display: grid;
  align-content: space-between;
  min-height: 92px;
  padding: 12px;
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  text-align: left;
}

.stat.active {
  outline: 2px solid rgba(37, 99, 235, 0.24);
}

.stat-no-due-date {
  border-color: #fde68a;
  background: #fffbea;
}

.stat-missing {
  border-color: #fda29b;
  background: #fee4e2;
}

.stat-due-this-week {
  border-color: #bfdbfe;
  background: #eff6ff;
}

.stat-due-next-week {
  border-color: #bbf7d0;
  background: #f0fdf4;
}

.stat-due-later {
  border-color: #f0abfc;
  background: #fae8ff;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1.08;
  text-transform: uppercase;
}

.stat strong {
  display: block;
  margin-top: 12px;
  font-size: 1.35rem;
  line-height: 1;
}

.week-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

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

.day-column {
  min-width: 0;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  overflow: hidden;
}

.day-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 54px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 800;
  text-align: left;
}

.day-toggle svg {
  width: 18px;
  height: 18px;
  color: var(--muted);
}

.day-toggle.active {
  border-color: var(--teal);
  background: var(--teal-soft);
}

.day-column.collapsed {
  min-width: 0;
  min-height: 0;
}

.day-column.collapsed .day-toggle {
  justify-content: space-between;
  min-height: 54px;
  padding: 0 14px;
  border-bottom: 0;
}

.day-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.day-lessons {
  display: grid;
  gap: 8px;
  padding: 10px;
}

.day-lessons[hidden] {
  display: none;
}

.mini-lesson {
  position: relative;
  width: 100%;
  padding: 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: #fff;
  text-align: left;
  overflow: hidden;
}

.mini-lesson:hover {
  border-color: var(--teal);
}

.mini-lesson strong,
.mini-lesson span {
  display: block;
}

.mini-lesson strong {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.mini-lesson strong > span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 0;
  color: inherit;
}

.mini-lesson em {
  flex: 0 0 auto;
  padding: 3px 6px;
  border-radius: 999px;
  background: #fef3c7;
  color: #7c2d12;
  font-size: 0.66rem;
  font-style: normal;
  font-weight: 800;
}

.mini-lesson .period-chip {
  background: var(--teal-soft);
  color: var(--teal);
}

.mini-lesson span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.82rem;
}

.empty-state {
  padding: 14px;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fff;
}

.lesson-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.lesson-detail {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.lesson-detail span,
.lesson-detail strong {
  display: block;
}

.lesson-detail span {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.lesson-detail strong {
  line-height: 1.3;
}

.lesson-detail-wide {
  grid-column: 1 / -1;
}

dialog {
  width: min(520px, calc(100vw - 28px));
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0;
  box-shadow: var(--shadow);
}

dialog::backdrop {
  background: rgba(23, 32, 42, 0.38);
}

.lesson-form {
  display: grid;
  gap: 14px;
  padding: 20px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 11px;
  color: var(--ink);
  background: #fff;
}

body.dark-mode .up-next-label {
  background: rgba(16, 27, 42, 0.96);
}

body.dark-mode .now-card.empty {
  background: rgba(20, 184, 166, 0.14);
  color: var(--ink);
}

body.dark-mode .now-prep,
body.dark-mode .prep-note,
body.dark-mode .mini-lesson em {
  background: rgba(250, 204, 21, 0.18);
  color: #fde68a;
}

body.dark-mode .homework-status,
body.dark-mode .preview-card span {
  background: rgba(139, 178, 255, 0.18);
  color: #c7d8ff;
}

body.dark-mode .homework.missing .homework-status {
  background: rgba(248, 113, 113, 0.24);
  color: #fecaca;
}

body.dark-mode .homework.no-date .homework-status {
  background: rgba(250, 204, 21, 0.18);
  color: #fde68a;
}

body.dark-mode .homework-message {
  background: rgba(250, 204, 21, 0.1);
  color: #fde68a;
}

body.dark-mode .homework-due-this-week,
body.dark-mode .stat-due-this-week {
  border-color: rgba(139, 178, 255, 0.5);
}

body.dark-mode .homework-due-next-week,
body.dark-mode .stat-due-next-week,
body.dark-mode .preview-card {
  border-color: rgba(74, 222, 128, 0.5);
}

body.dark-mode .homework-missing,
body.dark-mode .stat-missing {
  border-color: rgba(248, 113, 113, 0.58);
}

body.dark-mode .homework-no-due-date,
body.dark-mode .homework.no-date,
body.dark-mode .stat-no-due-date {
  border-color: rgba(250, 204, 21, 0.5);
}

body.dark-mode .homework-due-later,
body.dark-mode .stat-due-later {
  border-color: rgba(216, 180, 254, 0.55);
}

body.dark-mode .text-button.danger {
  color: #fecaca;
}

body.dark-mode .text-button.danger:hover {
  border-color: rgba(248, 113, 113, 0.52);
  background: rgba(248, 113, 113, 0.12);
}

body.dark-mode .homework a,
body.dark-mode .preview-card span,
body.dark-mode .homework-status {
  text-decoration-color: rgba(139, 178, 255, 0.38);
}

body.dark-mode .stat.active,
body.dark-mode .day-toggle.active,
body.dark-mode .lesson:hover,
body.dark-mode .mini-lesson:hover {
  border-color: rgba(94, 234, 212, 0.72);
  outline-color: rgba(94, 234, 212, 0.22);
}

body.dark-mode .day-toggle.active {
  background: rgba(20, 184, 166, 0.16);
}

body.dark-mode .day-panel {
  border-color: var(--line);
  background: rgba(19, 32, 49, 0.78);
}

body.dark-mode .lesson-list,
body.dark-mode .homework-list,
body.dark-mode .day-lessons {
  scrollbar-color: #516179 transparent;
}

body.dark-mode dialog {
  border-color: var(--line);
  background: var(--panel);
  color: var(--ink);
}

body.dark-mode input,
body.dark-mode select {
  color: var(--ink);
  background: #132031;
}

body.dark-mode ::placeholder {
  color: #7f8da3;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.dialog-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
}

@media (max-width: 980px) {
  .app-shell {
    padding: 18px;
  }

  .welcome-screen {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: stretch;
    grid-template-columns: 1fr;
  }

  .header-actions {
    grid-template-columns: 1fr;
  }

  .date-card {
    min-width: 0;
  }

  .period-card {
    min-width: 0;
  }

  .dashboard {
    grid-template-columns: 1fr;
  }

  .lesson {
    grid-template-columns: 1fr auto;
  }

  .lesson-time {
    grid-column: 1 / -1;
  }

  .day-tabs {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .panel {
    padding: 15px;
  }

  .homework-summary,
  .form-row {
    grid-template-columns: 1fr;
  }

  .panel-head {
    align-items: flex-start;
  }
}