/* 푸르넷 영어 수학 통합 학습 앱의 3D 학습 환경과 대시보드 스타일 */
:root {
  --ink: #183141;
  --muted: #566a78;
  --paper: rgba(255, 255, 255, .9);
  --line: rgba(24, 49, 65, .14);
  --math: #0b7f73;
  --english: #3157b8;
  --coral: #d95745;
  --sun: #efb82f;
  --violet: #6f58c9;
  --shadow: 0 18px 48px rgba(21, 46, 62, .16);
  --radius: 8px;
}

* { box-sizing: border-box; }

html,
body {
  min-height: 100%;
  margin: 0;
  font-family: Pretendard, "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background: #e9f7f3;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

#academy-scene {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  background: #e9f7f3;
}

.academy-shell {
  position: relative;
  z-index: 1;
  width: min(1440px, calc(100% - 28px));
  margin: 0 auto;
  padding: 14px 0 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 62px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .76);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 950;
  white-space: nowrap;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--math);
  color: #fff;
  box-shadow: inset 0 -5px 0 rgba(0, 0, 0, .14);
}

.top-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.top-actions button,
.lesson-actions button,
.card-nav button,
.quick-form button {
  min-height: 38px;
  border: 0;
  border-radius: var(--radius);
  padding: 9px 13px;
  background: #17384c;
  color: #fff;
  font-weight: 900;
  box-shadow: 0 8px 18px rgba(23, 56, 76, .18);
}

.top-actions button.active {
  background: var(--coral);
}

.learning-app-grid {
  display: grid;
  grid-template-columns: minmax(250px, 300px) minmax(520px, 1fr) minmax(280px, 330px);
  gap: 14px;
  align-items: start;
  padding-top: 14px;
}

.course-sidebar,
.lesson-workspace,
.role-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.course-sidebar {
  position: sticky;
  top: 14px;
  display: grid;
  gap: 12px;
  max-height: calc(100vh - 92px);
  overflow: auto;
  padding: 12px;
}

.subject-tabs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.subject-tabs button {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  border: 1px solid var(--line);
  border-left: 8px solid var(--accent);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .8);
  color: var(--ink);
  font-weight: 900;
}

.subject-tabs button.active {
  background: rgba(255, 255, 255, .96);
  box-shadow: inset 0 0 0 2px var(--accent);
}

.mini-stats,
.role-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.mini-stats article,
.role-metrics article {
  display: grid;
  gap: 4px;
  min-height: 72px;
  padding: 10px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--line);
}

.mini-stats span,
.role-metrics span {
  color: var(--muted);
  font-size: .84rem;
  font-weight: 800;
}

.mini-stats strong,
.role-metrics strong {
  font-size: 1.14rem;
}

.course-list {
  display: grid;
  gap: 8px;
}

.course-item {
  display: grid;
  gap: 5px;
  width: 100%;
  padding: 11px;
  border: 1px solid var(--line);
  border-left: 8px solid var(--accent);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .75);
  color: var(--ink);
  text-align: left;
}

.course-item.active {
  background: #fff;
  box-shadow: inset 0 0 0 2px var(--accent);
}

.course-item span,
.course-item small {
  color: var(--muted);
  font-size: .82rem;
  font-weight: 800;
}

.course-item strong {
  line-height: 1.25;
}

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

.lesson-hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  gap: 16px;
  align-items: stretch;
  min-height: 260px;
  padding: 18px;
  border-radius: var(--radius);
  border-top: 8px solid var(--accent);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .94), rgba(255, 255, 255, .72)),
    radial-gradient(circle at 84% 0%, color-mix(in srgb, var(--accent) 24%, transparent), transparent 42%);
}

.lesson-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
}

.eyebrow {
  display: inline-flex;
  width: fit-content;
  min-height: 25px;
  align-items: center;
  padding: 4px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .78);
  color: #315a65;
  font-size: .82rem;
  font-weight: 950;
}

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

.lesson-copy h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.lesson-copy p,
.role-panel p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.65;
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.lesson-actions button:first-child {
  background: var(--accent);
}

.lesson-visual {
  display: grid;
  place-items: center;
  gap: 8px;
  min-height: 190px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--line);
}

.lesson-visual span {
  font-size: clamp(4rem, 10vw, 7.5rem);
  line-height: 1;
}

.lesson-visual small,
.status {
  min-height: 26px;
  padding: 5px 8px;
  border-radius: var(--radius);
  background: rgba(23, 56, 76, .1);
  color: #17384c;
  font-weight: 900;
}

.status.done {
  background: rgba(11, 127, 115, .14);
  color: var(--math);
}

.feedback-line {
  margin: 0;
  padding: 11px 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(11, 127, 115, .22);
  background: rgba(232, 255, 249, .86);
  color: #14574f;
  font-weight: 850;
}

.lesson-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1fr);
  gap: 14px;
}

.study-cardbook,
.quiz-panel,
.lesson-map-panel,
.role-panel {
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .82);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
}

.panel-head h2 {
  margin: 8px 0 0;
  font-size: 1.22rem;
}

.card-count {
  color: var(--muted);
  font-weight: 900;
}

.flip-card {
  display: grid;
  place-items: center;
  gap: 12px;
  min-height: 220px;
  padding: 14px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255,255,255,.95), rgba(241,249,252,.86)),
    radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 46%);
  border: 1px solid var(--line);
  text-align: center;
}

.card-visual {
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  background: #fff;
  box-shadow: inset 0 -8px 0 rgba(0, 0, 0, .08);
  font-size: 3.2rem;
}

.flip-card strong {
  max-width: 28ch;
  font-size: 1.12rem;
  line-height: 1.45;
}

.card-nav {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.card-nav button:disabled {
  opacity: .4;
  cursor: default;
}

.quiz-prompt {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 850;
  line-height: 1.55;
}

.choice-grid {
  display: grid;
  gap: 8px;
}

.choice {
  min-height: 46px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  text-align: left;
  font-weight: 850;
}

.choice:hover {
  border-color: var(--accent);
}

.choice.selected.correct {
  background: rgba(11, 127, 115, .14);
  border-color: var(--math);
}

.choice.selected.wrong {
  background: rgba(217, 87, 69, .13);
  border-color: var(--coral);
}

.explain {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.lesson-map {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: 7px;
}

.lesson-map button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .78);
  color: var(--ink);
  font-weight: 900;
}

.lesson-map button.active {
  background: var(--accent);
  color: #fff;
}

.lesson-map button.done::after {
  content: "★";
  margin-left: 2px;
  color: var(--sun);
}

.role-panel {
  position: sticky;
  top: 14px;
  display: grid;
  gap: 12px;
  max-height: calc(100vh - 92px);
  overflow: auto;
}

.role-panel h2 {
  margin: 8px 0;
  font-size: 1.24rem;
}

.quick-form {
  display: grid;
  gap: 10px;
}

.quick-form label {
  display: grid;
  gap: 6px;
  font-weight: 900;
}

.quick-form input,
.quick-form select {
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
}

.monitor-list,
.admin-inventory {
  display: grid;
  gap: 8px;
}

.monitor-item {
  display: grid;
  gap: 4px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .76);
}

.monitor-item span {
  color: var(--muted);
  line-height: 1.4;
}

@media (max-width: 1180px) {
  .learning-app-grid {
    grid-template-columns: 280px minmax(0, 1fr);
  }

  .role-panel {
    position: static;
    grid-column: 1 / -1;
    max-height: none;
  }
}

@media (max-width: 820px) {
  .academy-shell {
    width: min(100% - 20px, 1440px);
    padding-top: 10px;
  }

  .topbar,
  .learning-app-grid,
  .lesson-hero-card,
  .lesson-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: stretch;
  }

  .top-actions {
    justify-content: flex-start;
  }

  .top-actions button {
    flex: 1 1 calc(50% - 8px);
  }

  .course-sidebar,
  .role-panel {
    position: static;
    max-height: none;
  }

  .lesson-visual {
    min-height: 140px;
  }
}

@media (max-width: 520px) {
  .mini-stats,
  .role-metrics {
    grid-template-columns: 1fr 1fr;
  }

  .lesson-copy h1 {
    font-size: 2rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}