:root {
  --mint: #addccf;
  --yellow: #fac66e;
  --red: #f15c57;
  --pink: #f9c1d0;
  --teal: #0dbdcf;
  --black: #333031;
  --paper: #fffaf4;
  --white: #ffffff;
  --line: rgba(51, 48, 49, 0.14);
  --soft: rgba(173, 220, 207, 0.35);
  --shadow: 0 20px 60px rgba(51, 48, 49, 0.13);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--black);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    linear-gradient(135deg, rgba(173, 220, 207, 0.42), transparent 32%),
    linear-gradient(225deg, rgba(250, 198, 110, 0.26), transparent 42%),
    var(--paper);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 22px;
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 72px;
  height: 72px;
}

.brand strong,
.brand span {
  display: block;
}

.brand span,
.sidebar-card span {
  color: #696163;
  font-size: 0.9rem;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav-button {
  min-height: 48px;
  padding: 0 16px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--black);
  text-align: left;
  font-weight: 800;
}

.nav-button.active,
.nav-button:hover {
  background: var(--black);
  color: var(--white);
}

.sidebar-card,
.wide-panel,
.practice-panel,
.sound-coach,
.activity-card,
.teacher-notes,
.log-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.sidebar-card {
  display: grid;
  gap: 6px;
  padding: 18px;
  margin-top: auto;
}

.main {
  min-width: 0;
  padding: 28px;
}

.topbar,
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.topbar {
  margin-bottom: 24px;
}

.top-actions {
  display: flex;
  align-items: end;
  gap: 12px;
  flex-wrap: wrap;
}

.select-label,
.eyebrow {
  color: #696163;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.select-label {
  display: grid;
  gap: 6px;
}

select,
input {
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
}

.segmented {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.segmented button {
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  font-weight: 800;
}

.segmented button.active {
  background: var(--teal);
  color: var(--white);
}

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

h1 {
  margin-bottom: 0;
  font-size: clamp(2.1rem, 4vw, 4.2rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.5rem, 2.4vw, 2.6rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.55rem;
  letter-spacing: 0;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.student-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: 18px;
}

.practice-panel,
.sound-coach,
.wide-panel,
.teacher-notes,
.log-panel {
  padding: 24px;
}

.icon-button {
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--black);
  font-size: 1.4rem;
  font-weight: 900;
}

.flashcard {
  display: grid;
  min-height: 340px;
  place-items: center;
  margin: 18px 0;
  padding: 24px;
  border: 4px solid var(--black);
  border-radius: 8px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.72)),
    var(--mint);
  text-align: center;
}

.flashcard span {
  font-size: 0.9rem;
  font-weight: 900;
  text-transform: uppercase;
}

.flashcard strong {
  display: block;
  font-size: clamp(5rem, 12vw, 10rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.flashcard p {
  max-width: 460px;
  margin-bottom: 0;
  font-size: 1.25rem;
}

.practice-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.primary-action,
.secondary-action,
.small-button {
  min-height: 46px;
  padding: 0 16px;
  border-radius: 8px;
  font-weight: 900;
}

.primary-action {
  border: 0;
  background: var(--red);
  color: var(--white);
}

.secondary-action,
.small-button {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--black);
}

.danger {
  color: #9d2524;
}

.sound-coach {
  display: grid;
  gap: 18px;
}

.mouth-demo {
  display: grid;
  min-height: 220px;
  place-items: center;
  border-radius: 8px;
  background: var(--soft);
}

.face {
  position: relative;
  width: 154px;
  height: 154px;
  border: 6px solid var(--black);
  border-radius: 50%;
  background: var(--yellow);
}

.face span {
  position: absolute;
  top: 52px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--black);
}

.face span:first-child {
  left: 46px;
}

.face span:nth-child(2) {
  right: 46px;
}

.face i {
  position: absolute;
  left: 52px;
  bottom: 42px;
  width: 50px;
  height: 20px;
  border-radius: 50px;
  background: var(--black);
}

.face.open i {
  left: 58px;
  width: 38px;
  height: 42px;
  border-radius: 50%;
}

.face.smile i {
  bottom: 42px;
  height: 28px;
  background: transparent;
  border-bottom: 8px solid var(--black);
}

.mini-progress {
  display: grid;
  gap: 8px;
}

progress {
  width: 100%;
  height: 16px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: var(--soft);
}

progress::-webkit-progress-bar {
  background: var(--soft);
}

progress::-webkit-progress-value {
  background: var(--teal);
}

.activity-grid,
.dashboard-grid,
.parent-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.dashboard-grid,
.parent-layout {
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  margin-top: 0;
}

.activity-card {
  display: grid;
  gap: 16px;
  min-height: 270px;
  padding: 20px;
}

.sound-chips,
.game-board,
.badge-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.sound-chips button,
.game-board button {
  min-width: 72px;
  min-height: 64px;
  border: 3px solid var(--black);
  border-radius: 8px;
  background: var(--white);
  font-size: 1.45rem;
  font-weight: 900;
}

.game-card {
  background: var(--mint);
}

.game-board button.correct {
  background: var(--yellow);
}

.badge {
  display: grid;
  width: 62px;
  height: 62px;
  place-items: center;
  border: 4px solid var(--black);
  border-radius: 50%;
  background: var(--pink);
  font-weight: 900;
}

.badge.earned {
  background: var(--yellow);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
  background: var(--white);
}

th,
td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  background: var(--black);
  color: var(--white);
}

.teacher-notes ul {
  margin: 0;
  padding-left: 20px;
  line-height: 1.7;
}

.reading-form {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 120px minmax(180px, 0.6fr) auto;
  gap: 14px;
  align-items: end;
}

.reading-form label {
  display: grid;
  gap: 8px;
  font-weight: 800;
}

.reading-log {
  display: grid;
  gap: 10px;
}

.log-item,
.content-item {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.log-item strong,
.log-item span {
  display: block;
}

.content-library {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.content-item {
  display: grid;
  gap: 8px;
}

.content-item div {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pill {
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--soft);
  font-weight: 800;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(420px, calc(100vw - 36px));
  padding: 14px 16px;
  border-radius: 8px;
  background: var(--black);
  color: var(--white);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1020px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 5;
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
    padding: 12px;
  }

  .brand img {
    width: 54px;
    height: 54px;
  }

  .nav {
    display: flex;
    min-width: max-content;
  }

  .sidebar-card {
    display: none;
  }

  .student-layout,
  .dashboard-grid,
  .parent-layout,
  .activity-grid {
    grid-template-columns: 1fr;
  }

  .reading-form,
  .content-library {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .main {
    padding: 16px;
  }

  .topbar,
  .top-actions,
  .panel-heading {
    display: grid;
    align-items: stretch;
  }

  .segmented {
    width: 100%;
  }

  .segmented button,
  .practice-actions > *,
  .primary-action,
  .secondary-action {
    flex: 1;
  }

  .flashcard {
    min-height: 280px;
  }
}