/* 아침 한 입 - 공통 디자인 시스템 */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700;900&display=swap');

:root {
  --color-primary: #d97706;
  --color-primary-strong: #b45309;
  --color-primary-soft: #fff7ed;
  --color-secondary: #0f766e;
  --color-secondary-soft: #ecfdf5;
  --color-background: #fffaf0;
  --color-background-cool: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-muted: #f8fafc;
  --color-text-primary: #1f2937;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-success: #15803d;
  --color-success-soft: #dcfce7;
  --color-warning: #b45309;
  --color-warning-soft: #fef3c7;
  --color-error: #b91c1c;
  --color-error-soft: #fee2e2;
  --color-disabled: #cbd5e1;
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.05);
  --radius-card: 1rem;
  --radius-control: 0.875rem;
  --focus-ring: 0 0 0 3px rgba(217, 119, 6, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-background);
}

body {
  min-width: 320px;
  padding-top: 4rem;
  background:
    radial-gradient(circle at top left, rgba(254, 243, 199, 0.55), transparent 28rem),
    linear-gradient(180deg, #fff7ed 0%, #fffaf0 42%, #f8fafc 100%);
  color: var(--color-text-primary);
  font-family: 'Noto Sans KR', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: 0;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  min-height: 2.75rem;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

#app {
  min-height: calc(100vh - 4rem);
}

.screen {
  animation: fadeIn 0.2s ease;
}

.app-shell {
  width: min(100% - 2rem, 72rem);
  margin: 0 auto;
  padding: clamp(1rem, 2vw, 1.75rem) 0 2rem;
}

.app-shell--narrow {
  width: min(100% - 2rem, 30rem);
}

.app-shell--medium {
  width: min(100% - 2rem, 48rem);
}

.app-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.app-header__eyebrow,
.section-eyebrow {
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  font-weight: 900;
}

.app-title {
  margin: 0;
  color: var(--color-text-primary);
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  font-weight: 900;
  line-height: 1.18;
}

.app-subtitle {
  margin-top: 0.35rem;
  color: var(--color-text-secondary);
  font-size: clamp(0.92rem, 2vw, 1.05rem);
  line-height: 1.55;
}

.surface-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.surface-card--soft {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
}

.section-block {
  margin-top: 1.25rem;
}

.section-title {
  margin-bottom: 0.65rem;
  color: var(--color-text-primary);
  font-size: 1.05rem;
  font-weight: 900;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  padding: 0.78rem 1rem;
  font-weight: 900;
  line-height: 1.2;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease, box-shadow 0.16s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-strong);
}

.btn-secondary {
  background: var(--color-secondary);
  color: white;
}

.btn-secondary:hover {
  background: #115e59;
}

.btn-soft {
  background: var(--color-primary-soft);
  border-color: #fed7aa;
  color: var(--color-primary-strong);
}

.btn-neutral {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

.btn-danger {
  background: var(--color-error);
  color: white;
}

.icon-btn,
.back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-weight: 900;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.form-label {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--color-text-primary);
  font-size: 0.9rem;
  font-weight: 900;
}

.form-input,
.form-textarea,
input[type="text"],
textarea {
  width: 100%;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  color: var(--color-text-primary);
  line-height: 1.5;
}

input[type="text"] {
  min-height: 3.25rem;
}

textarea {
  resize: vertical;
}

.help-text {
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  line-height: 1.55;
}

.error-text {
  color: var(--color-error);
  font-size: 0.82rem;
  font-weight: 900;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border-radius: 9999px;
  padding: 0.28rem 0.62rem;
  font-size: 0.74rem;
  font-weight: 900;
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.badge-secondary {
  background: var(--color-secondary-soft);
  color: var(--color-secondary);
}

.badge-success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.badge-warning {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.badge-muted {
  background: var(--color-surface-muted);
  color: var(--color-text-secondary);
}

.notice {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface-muted);
  padding: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.notice--warm {
  border-color: #fed7aa;
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.notice--calm {
  border-color: #99f6e4;
  background: var(--color-secondary-soft);
  color: var(--color-secondary);
}

.progress-track {
  width: 100%;
  height: 0.7rem;
  overflow: hidden;
  border-radius: 9999px;
  background: #e5e7eb;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-primary), #f59e0b);
  transition: width 0.55s ease;
}

/* 분수는 데이터에서는 3/4로 다루고, 화면에서는 분자·분모를 세로로 표시한다. */
.math-expression,
.choice-btn {
  line-height: 1.35;
}

.math-fraction {
  display: inline-flex;
  flex-direction: column;
  vertical-align: middle;
  min-width: 1.25em;
  margin: 0 0.08em;
  font-size: 0.8em;
  line-height: 1;
  text-align: center;
}

.math-fraction__numerator {
  padding: 0 0.16em 0.08em;
  border-bottom: 0.08em solid currentColor;
}

.math-fraction__denominator {
  padding: 0.08em 0.16em 0;
}

.activity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.85rem;
}

.activity-card,
.mission-card,
.difficulty-card,
.grade-card,
.level-card,
.emotion-card,
.promise-status-btn {
  border: 1px solid var(--color-border) !important;
  border-radius: var(--radius-card) !important;
  background: var(--color-surface) !important;
  box-shadow: var(--shadow-card);
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.activity-card:hover,
.mission-card:hover,
.difficulty-card:hover,
.grade-card:hover,
.level-card:hover,
.emotion-card:hover,
.promise-status-btn:hover {
  transform: translateY(-2px);
  border-color: #fbbf24 !important;
  box-shadow: var(--shadow-soft);
}

.activity-card {
  display: flex;
  min-height: 9.5rem;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.9rem;
  padding: 1rem;
  cursor: pointer;
}

.activity-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.activity-card__icon {
  display: inline-flex;
  width: 2.75rem;
  height: 2.75rem;
  align-items: center;
  justify-content: center;
  border-radius: 0.85rem;
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  font-size: 1.25rem;
  font-weight: 900;
}

.activity-card__title {
  color: var(--color-text-primary);
  font-size: 1.05rem;
  font-weight: 900;
}

/* 활동 카드의 이름표. 예전에는 '수/어/+/마' 한 글자 아이콘이 있던 자리다. */
.activity-card__name {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.85rem;
  border-radius: 0.85rem;
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.2;
  white-space: nowrap;
}

.activity-card__desc {
  margin-top: 0.25rem;
  color: var(--color-text-secondary);
  font-size: 0.86rem;
  line-height: 1.5;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.75rem;
}

.stat-card {
  padding: 1rem;
}

.stat-card__label {
  color: var(--color-text-secondary);
  font-size: 0.76rem;
  font-weight: 900;
}

.stat-card__value {
  margin-top: 0.2rem;
  color: var(--color-text-primary);
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 900;
}

.empty-state {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, 0.65);
  padding: 2rem 1rem;
  color: var(--color-text-secondary);
  text-align: center;
}

.complete-card {
  text-align: center;
}

.complete-card__icon {
  margin: 0 auto 1rem;
  display: inline-flex;
  width: 4rem;
  height: 4rem;
  align-items: center;
  justify-content: center;
  border-radius: 1.25rem;
  background: var(--color-success-soft);
  color: var(--color-success);
  font-size: 2rem;
}

#feedback-topbar {
  position: fixed;
  top: 0.5rem;
  right: 0.85rem;
  z-index: 40;
}

.feedback-open-btn {
  display: inline-flex;
  min-height: 2.5rem;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
  color: var(--color-text-primary);
  font-size: 0.8rem;
  font-weight: 900;
  padding: 0.5rem 0.85rem;
}

.feedback-open-btn:hover {
  background: white;
}

.teacher-panel {
  margin-bottom: 1rem;
  padding: 1rem;
}

.teacher-panel__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.data-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.data-table {
  min-width: 42rem;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th {
  background: var(--color-surface-muted);
  color: var(--color-text-secondary);
  font-weight: 900;
  text-align: left;
}

.data-table th,
.data-table td {
  border-top: 1px solid var(--color-border);
  padding: 0.8rem;
  vertical-align: top;
}

.data-table thead th {
  border-top: 0;
}

.choice-btn {
  min-height: 4rem;
  transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease, background 0.14s ease;
}

.choice-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.choice-btn.correct-ans {
  background: var(--color-success-soft) !important;
  border-color: var(--color-success) !important;
  color: var(--color-success) !important;
}

.choice-btn.wrong-ans {
  background: var(--color-error-soft) !important;
  border-color: var(--color-error) !important;
  color: var(--color-error) !important;
  animation: gentleShake 0.28s ease;
}

.sudoku-cell {
  width: 64px;
  height: 64px;
  border: 1.5px solid #d6a35a;
  background: white;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  font-weight: 900;
  text-align: center;
  outline: none;
  transition: background 0.12s ease, transform 0.1s ease, box-shadow 0.12s ease;
  caret-color: var(--color-primary);
}

.sudoku-cell:focus,
.sudoku-cell[style*="box-shadow"] {
  background: #fff7ed;
  z-index: 1;
  position: relative;
}

.sudoku-cell.given {
  background: #f8fafc;
  color: #7c2d12;
  cursor: not-allowed;
}

.sudoku-cell.error {
  background: var(--color-error-soft);
  color: var(--color-error);
  animation: gentleShake 0.28s ease;
}

.sudoku-cell.correct {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.sudoku-cell.locked {
  background: #eff6ff;
  color: #1d4ed8;
  box-shadow: inset 0 0 0 2px #60a5fa;
}

.sudoku-grid-4 .sudoku-cell:nth-child(2n+1) {
  border-left-width: 2px;
}

.sudoku-grid-4 .sudoku-cell:nth-child(2n) {
  border-right-width: 2px;
}

.gauge-bar {
  transition: width 0.55s ease;
}

.daily-promise-day {
  aspect-ratio: 1 / 1;
  border-radius: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

/* 초성 퀴즈 주관식 입력 */
.answer-input {
  transition: all 0.15s;
  letter-spacing: 0.1em;
}
.answer-input:disabled {
  opacity: 1;
}
.answer-input.correct-ans {
  background: #10b981;
  border-color: #10b981;
  color: white;
}
.answer-input.wrong-ans {
  background: #ef4444;
  border-color: #ef4444;
  color: white;
  animation: gentleShake 0.3s ease;
}
.answer-input.wrong-ans::placeholder {
  color: white;
  opacity: 0.95;
}

/* 화면 전환 */
.screen {
  animation: fadeIn 0.3s ease;
}

.streak-flame {
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes gentleShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

@media (min-width: 900px) {
  body {
    padding-top: 4.25rem;
  }

  .dashboard-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.8fr);
    gap: 1rem;
    align-items: start;
  }

  .teacher-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
  }
}

@media (min-width: 1200px) {
  .teacher-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  body {
    padding-top: 3.7rem;
  }

  .app-header {
    flex-direction: column;
  }

  #feedback-topbar {
    top: 0.55rem;
    right: 0.55rem;
  }

  .feedback-open-btn {
    padding-inline: 0.7rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}