:root {
  --bg: #fff7ef;
  --panel: rgba(255, 255, 255, 0.86);
  --panel-strong: #fffdf9;
  --ink: #24303a;
  --muted: #6d7a85;
  --line: rgba(36, 48, 58, 0.09);
  --primary: #ff7d4d;
  --primary-dark: #ef6230;
  --teal: #4fb0a3;
  --yellow: #ffd469;
  --sky: #85b8ff;
  --green: #86c87a;
  --red: #f36e6e;
  --shadow: 0 20px 60px rgba(208, 144, 94, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 212, 105, 0.45), transparent 30%),
    radial-gradient(circle at top right, rgba(133, 184, 255, 0.35), transparent 28%),
    linear-gradient(180deg, #fff5ea 0%, #fffdf8 56%, #fff5f0 100%);
  font-family: "Nunito", sans-serif;
}

button,
input {
  font: inherit;
}

.page-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 18%, rgba(255, 125, 77, 0.12), transparent 24%),
    radial-gradient(circle at 85% 14%, rgba(79, 176, 163, 0.14), transparent 20%);
}

.app-shell {
  position: relative;
  max-width: 1220px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand h1 {
  margin: 0;
  font-family: "Baloo 2", sans-serif;
  font-size: 2rem;
  line-height: 1;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
}

.brand-chip {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 22px;
  background: linear-gradient(135deg, var(--primary), #ffb35b);
  color: white;
  font-family: "Baloo 2", sans-serif;
  font-size: 1.35rem;
  box-shadow: 0 14px 35px rgba(255, 125, 77, 0.28);
}

.nav-tabs {
  display: flex;
  gap: 10px;
  padding: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.nav-tab {
  border: 0;
  padding: 10px 18px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: 180ms ease;
}

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

.layout {
  display: grid;
  gap: 20px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.panel,
.hero {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 200px;
  margin-bottom: 20px;
  background:
    linear-gradient(135deg, rgba(255, 125, 77, 0.12), rgba(255, 255, 255, 0.92)),
    linear-gradient(120deg, rgba(133, 184, 255, 0.12), transparent 55%);
}

.hero::after {
  content: "";
  position: absolute;
  right: -20px;
  bottom: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 212, 105, 0.45), transparent 70%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
  gap: 20px;
  align-items: stretch;
}

.hero h2,
.panel h2,
.panel h3 {
  margin: 0 0 12px;
  font-family: "Baloo 2", sans-serif;
}

.hero-title {
  font-size: clamp(1.8rem, 3.2vw, 2.7rem);
  line-height: 1;
  margin-bottom: 6px;
}

.checkin-card {
  padding: 12px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(36, 48, 58, 0.07);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 8px 0 12px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(36, 48, 58, 0.08);
  color: var(--muted);
}

.hero-actions,
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0;
}

.hero-metric {
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(36, 48, 58, 0.08);
}

.hero-metric-value {
  margin-top: 4px;
  font-size: 1.18rem;
  font-weight: 800;
}

.checkin-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.checkin-streak {
  margin-top: 2px;
  font-size: 1.45rem;
  font-weight: 800;
}

.checkin-best {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(79, 176, 163, 0.12);
  color: #24776b;
  font-weight: 700;
  font-size: 0.86rem;
}

.week-labels {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.72rem;
  text-align: center;
}

.hero-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
}

.hero-calendar-blank {
  min-height: 32px;
}

.hero-calendar-day {
  padding: 5px 2px;
  border-radius: 10px;
  text-align: center;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(36, 48, 58, 0.08);
  min-height: 32px;
}

.hero-calendar-day.done {
  background: rgba(134, 200, 122, 0.18);
  border-color: rgba(134, 200, 122, 0.36);
}

.hero-calendar-day.today {
  box-shadow: inset 0 0 0 2px rgba(255, 125, 77, 0.38);
}

.primary-btn,
.secondary-btn,
.danger-btn,
.option-btn,
.submit-btn {
  border: 0;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.primary-btn,
.submit-btn {
  padding: 13px 18px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), #ffb35b);
  color: white;
  font-weight: 800;
  box-shadow: 0 14px 32px rgba(255, 125, 77, 0.24);
}

.secondary-btn {
  padding: 13px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  border: 1px solid rgba(36, 48, 58, 0.09);
}

.danger-btn {
  padding: 13px 18px;
  border-radius: 16px;
  background: linear-gradient(135deg, #ef6a6a, #d94a4a);
  color: white;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(217, 74, 74, 0.24);
 }

.primary-btn:hover,
.secondary-btn:hover,
.danger-btn:hover,
.option-btn:hover,
.submit-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:disabled,
.secondary-btn:disabled,
.danger-btn:disabled,
.submit-btn:disabled {
  cursor: wait;
  opacity: 0.72;
  transform: none;
}

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

.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat-grid {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-bottom: 20px;
}

.metric-card {
  padding: 18px;
  border-radius: 24px;
  background: var(--panel-strong);
  border: 1px solid rgba(36, 48, 58, 0.08);
}

.metric-label {
  color: var(--muted);
  font-size: 0.92rem;
}

.metric-value {
  margin-top: 8px;
  font-size: 1.85rem;
  font-weight: 800;
}

.metric-sub {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.96rem;
}

.progress-list {
  display: grid;
  gap: 16px;
}

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

.progress-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.bar {
  height: 12px;
  border-radius: 999px;
  background: rgba(36, 48, 58, 0.07);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--teal), #7cd6b8);
}

.bar-fill.orange {
  background: linear-gradient(135deg, var(--primary), #ffb35b);
}

.bar-fill.blue {
  background: linear-gradient(135deg, #79a9ff, #8ed6ff);
}

.trend-list {
  display: grid;
  gap: 10px;
}

.calendar-date {
  color: var(--muted);
  font-size: 0.68rem;
}

.calendar-mark {
  margin-top: 2px;
  font-size: 0.82rem;
  font-weight: 800;
}

.study-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
}

.study-main {
  min-height: 540px;
}

.study-side h2 {
  margin-bottom: 16px;
}

.study-plan-mini {
  display: grid;
  gap: 12px;
}

.mini-line {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(36, 48, 58, 0.08);
}

.full-width {
  width: 100%;
  margin-top: 16px;
}

.empty-state {
  display: grid;
  place-items: center;
  gap: 10px;
  min-height: 400px;
  text-align: center;
}

.study-card {
  display: grid;
  gap: 20px;
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.92rem;
}

.badge.priority-s {
  background: rgba(255, 125, 77, 0.14);
  color: var(--primary-dark);
}

.badge.priority-a {
  background: rgba(79, 176, 163, 0.14);
  color: #24776b;
}

.badge.priority-b,
.badge.priority-c {
  background: rgba(133, 184, 255, 0.14);
  color: #3565b8;
}

.prompt-title {
  font-size: 2.1rem;
  font-weight: 800;
}

.phonetic {
  color: var(--muted);
  margin-top: 4px;
}

.mode-tip {
  color: var(--muted);
  font-size: 1rem;
}

.option-grid {
  display: grid;
  gap: 12px;
}

.option-btn {
  padding: 16px 18px;
  border-radius: 20px;
  text-align: left;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(36, 48, 58, 0.08);
  color: var(--ink);
}

.option-btn.selected {
  border-color: rgba(255, 125, 77, 0.45);
  background: rgba(255, 125, 77, 0.12);
}

.spell-box {
  display: grid;
  gap: 12px;
}

.spell-input {
  width: 100%;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(36, 48, 58, 0.12);
  background: rgba(255, 255, 255, 0.94);
}

.hint-box,
.feedback {
  padding: 14px 16px;
  border-radius: 18px;
}

.hint-box {
  background: rgba(255, 212, 105, 0.18);
  color: #8c6a17;
}

.hint-box.soft {
  background: rgba(79, 176, 163, 0.14);
  color: #206e63;
}

.feedback {
  background: rgba(79, 176, 163, 0.14);
}

.feedback.wrong {
  background: rgba(243, 110, 110, 0.14);
}

.feedback.almost {
  background: rgba(255, 212, 105, 0.16);
}

.list {
  display: grid;
  gap: 12px;
}

.list-item {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(36, 48, 58, 0.08);
}

.word-meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.muted {
  color: var(--muted);
}

.parent-add-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.parent-add-note {
  max-width: 340px;
  padding: 12px 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(36, 48, 58, 0.08);
  color: var(--muted);
  font-size: 0.95rem;
}

.parent-add-form {
  display: grid;
  gap: 14px;
}

.parent-add-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 12px;
}

.parent-add-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgba(36, 48, 58, 0.12);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
}

.parent-add-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.parent-add-feedback {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(133, 184, 255, 0.14);
  border: 1px solid rgba(133, 184, 255, 0.28);
}

.parent-add-feedback.success {
  background: rgba(134, 200, 122, 0.14);
  border-color: rgba(134, 200, 122, 0.28);
}

.parent-add-feedback.error {
  background: rgba(243, 110, 110, 0.14);
  border-color: rgba(243, 110, 110, 0.26);
}

.word-progress-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
}

.word-filter {
  width: min(360px, 100%);
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgba(36, 48, 58, 0.12);
  background: rgba(255, 255, 255, 0.94);
}

.word-table {
  display: grid;
  gap: 10px;
  max-height: 560px;
  overflow: auto;
  padding-right: 4px;
}

.word-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) 90px 120px 150px 88px 84px;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(36, 48, 58, 0.08);
}

.word-row.header {
  position: sticky;
  top: 0;
  z-index: 1;
  background: rgba(255, 250, 244, 0.98);
  font-weight: 800;
}

.word-cell-main {
  display: grid;
  gap: 4px;
}

.word-flag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 212, 105, 0.22);
  color: #8b5f00;
  font-size: 0.82rem;
  font-weight: 700;
}

.tiny-bar {
  height: 8px;
  border-radius: 999px;
  background: rgba(36, 48, 58, 0.08);
  overflow: hidden;
}

.tiny-bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--teal), #7cd6b8);
}

@media (max-width: 960px) {
  .topbar,
  .hero-grid,
  .hero-metrics,
  .study-layout,
  .two-col,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-tabs {
    width: 100%;
    overflow: auto;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 16px;
  }

  .panel,
  .hero {
    padding: 18px;
    border-radius: 22px;
  }

  .card-top,
  .progress-top,
  .list-item,
  .word-row,
  .word-progress-toolbar {
    grid-template-columns: 1fr;
    display: grid;
  }

  .parent-add-header,
  .parent-add-grid,
  .parent-add-actions {
    grid-template-columns: 1fr;
    display: grid;
  }
}