/* 푸르넷 영어 MVC 학습 프로그램의 화면 스타일 */
:root {
  --bg: #e7fbf8;
  --paper: #f2fffd;
  --surface: #ffffff;
  --surface-soft: #e9fbf6;
  --ink: #0c2d2c;
  --muted: #335f5b;
  --line: rgba(0, 112, 112, 0.16);
  --line-strong: rgba(0, 112, 112, 0.28);
  --navy: #063a46;
  --teal: #00786f;
  --mint: #cbf6ee;
  --blue: #086f8c;
  --coral: #bd3f34;
  --amber: #22c6b5;
  --lime: #4ed7b2;
  --focus: #005d56;
  --shadow: 0 18px 42px rgba(0, 91, 96, 0.14);
  --shadow-soft: 0 8px 20px rgba(0, 91, 96, 0.09);
  --radius: 8px;
  --font: "Pretendard", "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--ink);
  font-family: var(--font);
  background: var(--bg);
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 12% 8%, rgba(0, 194, 180, 0.22), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(12, 143, 179, 0.16), transparent 30%),
    linear-gradient(180deg, rgba(237, 255, 251, 0.9), rgba(213, 248, 241, 0.96)),
    linear-gradient(90deg, rgba(0, 112, 112, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(0, 112, 112, 0.05) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
}

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

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.68;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(0, 155, 142, 0.34);
  outline-offset: 2px;
}

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

h2 {
  margin-bottom: 12px;
  font-size: 19px;
  letter-spacing: 0;
}

h3 {
  font-size: 17px;
  letter-spacing: 0;
}

.app-shell {
  min-height: 100vh;
  padding: 14px;
}

.topbar {
  position: sticky;
  top: 12px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1760px, 100%);
  margin: 0 auto 14px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 48px;
  height: 48px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  box-shadow: 0 10px 22px rgba(0, 155, 142, 0.24);
  font-weight: 950;
}

.top-intro {
  display: grid;
  min-width: 0;
  gap: 4px;
}

.topbar h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.18;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
}

.top-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.top-meta span {
  min-height: 24px;
  padding: 4px 8px;
  border: 1px solid rgba(0, 155, 142, 0.2);
  border-radius: 999px;
  color: #006d66;
  background: #dffbf4;
  font-size: 12px;
  font-weight: 850;
}

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

.ghost-btn,
.danger-btn,
.primary-btn,
.secondary-btn,
.stage-btn,
.track-btn,
.choice-btn,
.small-btn,
.axis-btn {
  min-height: 40px;
  border-radius: var(--radius);
  font-weight: 850;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.ghost-btn:hover,
.danger-btn:hover,
.primary-btn:hover,
.secondary-btn:hover,
.stage-btn:hover,
.track-btn:hover,
.choice-btn:hover,
.small-btn:hover,
.axis-btn:hover {
  transform: translateY(-2px);
}

.ghost-btn {
  padding: 0 14px;
  color: var(--navy);
  border: 1px solid var(--line);
  background: #effffc;
}

.danger-btn {
  padding: 0 14px;
  color: #fff;
  background: var(--coral);
}

.primary-btn {
  padding: 0 16px;
  color: #fff;
  background: var(--teal);
  box-shadow: 0 10px 22px rgba(0, 155, 142, 0.24);
}

.secondary-btn {
  padding: 0 14px;
  color: var(--focus);
  border: 1px solid rgba(0, 155, 142, 0.22);
  background: #dffbf4;
}

.small-btn {
  min-height: 32px;
  padding: 0 10px;
  color: #064c47;
  background: #d7faf2;
}

.learner-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.78fr) minmax(230px, 0.54fr);
  gap: 14px;
  width: min(1760px, 100%);
  margin: 0 auto 14px;
  padding: 18px;
  border-radius: var(--radius);
  color: #fff;
  background:
    radial-gradient(circle at 86% 18%, rgba(99, 241, 224, 0.22), transparent 34%),
    linear-gradient(135deg, rgba(5, 58, 70, 0.98), rgba(0, 111, 103, 0.98) 54%, rgba(0, 137, 126, 0.94)),
    linear-gradient(90deg, rgba(219, 255, 249, 0.12) 1px, transparent 1px);
  background-size: auto, 54px 54px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-copy {
  display: grid;
  align-content: center;
  min-width: 0;
}

.hero-copy .eyebrow {
  color: rgba(255, 255, 255, 0.72);
}

.hero-copy h2 {
  max-width: 760px;
  margin: 4px 0 12px;
  font-size: 34px;
  line-height: 1.18;
}

.hero-copy p {
  max-width: 74ch;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.learner-hero .secondary-btn {
  color: #004f48;
  border-color: rgba(220, 255, 249, 0.64);
  background: rgba(224, 255, 249, 0.94);
}

.hero-visual {
  position: relative;
  display: grid;
  min-height: 240px;
  place-items: center;
}

.hero-visual img {
  width: min(100%, 360px);
  border-radius: var(--radius);
  box-shadow: 0 22px 38px rgba(0, 0, 0, 0.18);
  animation: studioFloat 5s ease-in-out infinite;
}

.floating-card {
  position: absolute;
  min-width: 128px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: var(--radius);
  color: #fff;
  background: rgba(8, 24, 22, 0.58);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(16px);
}

.floating-card span {
  display: block;
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  font-weight: 900;
}

.floating-card strong {
  display: block;
  margin-top: 2px;
  font-size: 14px;
}

.hero-card-stage {
  left: 0;
  bottom: 34px;
}

.hero-card-sync {
  right: 0;
  top: 28px;
}

.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-content: center;
}

.hero-stat {
  min-height: 104px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.1);
}

.hero-stat span {
  display: block;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
  font-weight: 900;
}

.hero-stat strong {
  display: block;
  margin-top: 10px;
  font-size: 28px;
  line-height: 1;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(265px, 330px) minmax(0, 1fr) minmax(300px, 380px);
  gap: 14px;
  width: min(1760px, 100%);
  margin: 0 auto;
}

.track-panel,
.lesson-panel,
.teacher-panel {
  min-width: 0;
}

.track-panel,
.teacher-card,
.lesson-summary,
.activity-card,
.portfolio-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
}

.track-panel {
  position: sticky;
  top: 96px;
  align-self: start;
  max-height: calc(100vh - 112px);
  padding: 14px;
  overflow: auto;
}

.track-panel,
.teacher-panel {
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 155, 142, 0.14) transparent;
}

.track-panel::-webkit-scrollbar,
.teacher-panel::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

.track-panel::-webkit-scrollbar-track,
.teacher-panel::-webkit-scrollbar-track {
  background: transparent;
}

.track-panel::-webkit-scrollbar-thumb,
.teacher-panel::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(0, 155, 142, 0.12);
}

.track-panel::-webkit-scrollbar-thumb:hover,
.teacher-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 155, 142, 0.28);
}

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

.panel-heading h2 {
  margin-bottom: 0;
}

.count-pill,
.tag,
.meta-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid rgba(0, 155, 142, 0.22);
  border-radius: 999px;
  color: #006d66;
  background: #dffbf4;
  font-size: 12px;
  font-weight: 850;
  white-space: nowrap;
}

.search-box {
  display: grid;
  gap: 6px;
  margin: 14px 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 850;
}

.search-box input,
.writing-box,
.reflection-box {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: #fff;
}

.search-box input {
  min-height: 44px;
  padding: 0 12px;
}

.search-box input::placeholder,
.writing-box::placeholder,
.reflection-box::placeholder {
  color: #8b9894;
}

.axis-filters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.axis-btn {
  min-height: 36px;
  border: 1px solid var(--line);
  color: #28453e;
  background: #fff;
  font-size: 13px;
  font-weight: 850;
}

.axis-btn.active {
  color: #fff;
  border-color: transparent;
  background: var(--blue);
  box-shadow: 0 8px 18px rgba(49, 95, 212, 0.2);
}

.track-list {
  display: grid;
  gap: 9px;
}

.track-btn {
  position: relative;
  display: grid;
  width: 100%;
  grid-template-columns: 42px 1fr;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: #fff;
  text-align: left;
}

.track-btn:hover {
  border-color: rgba(0, 155, 142, 0.34);
  box-shadow: 0 10px 20px rgba(0, 155, 142, 0.1);
}

.track-btn.active {
  border-color: rgba(0, 155, 142, 0.56);
  background: linear-gradient(90deg, #edf9f5, #ffffff);
  box-shadow: 0 12px 24px rgba(0, 155, 142, 0.14);
}

.track-code {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius);
  color: #fff;
  background: var(--navy);
  font-weight: 950;
}

.track-btn.active .track-code {
  background: var(--teal);
}

.track-title {
  display: block;
  font-size: 15px;
  font-weight: 950;
  line-height: 1.35;
}

.track-meta {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.track-progress {
  display: block;
  height: 6px;
  margin-top: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: #d2eee8;
}

.track-progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--amber));
}

.lesson-panel {
  display: grid;
  align-content: start;
  gap: 14px;
}

.lesson-summary {
  padding: 20px;
  background:
    linear-gradient(90deg, rgba(0, 194, 180, 0.13), transparent 42%),
    #fff;
}

.summary-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 16px;
  align-items: stretch;
}

.lesson-summary .eyebrow,
.activity-head .eyebrow {
  color: #007568;
}

.lesson-title {
  margin-bottom: 8px;
  font-size: 29px;
  letter-spacing: 0;
  line-height: 1.2;
}

.summary-copy {
  max-width: 76ch;
  color: var(--muted);
  line-height: 1.7;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

.metric-grid {
  display: grid;
  gap: 10px;
}

.metric {
  display: grid;
  align-content: center;
  min-height: 94px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.metric span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
}

.metric strong {
  display: block;
  margin-top: 6px;
  font-size: 28px;
  line-height: 1;
}

.stage-tabs {
  display: grid;
  grid-template-columns: repeat(7, minmax(86px, 1fr));
  gap: 8px;
}

.stage-btn {
  position: relative;
  padding: 9px 8px;
  border: 1px solid var(--line);
  color: #24423b;
  background: #fff;
}

.stage-btn.active {
  color: #fff;
  border-color: transparent;
  background: var(--blue);
  box-shadow: 0 10px 22px rgba(49, 95, 212, 0.24);
}

.stage-btn.done {
  border-color: rgba(0, 155, 142, 0.34);
  background: #dffbf4;
}

.stage-btn.done::after {
  position: absolute;
  top: 6px;
  right: 7px;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--teal);
  content: "";
}

.stage-btn.active.done {
  background: var(--blue);
}

.activity-card {
  padding: 20px;
}

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

.activity-head h2 {
  font-size: 23px;
}

.activity-head p,
.teacher-tip,
.feedback-text {
  color: var(--muted);
  line-height: 1.65;
}

.activity-head .tag {
  max-width: 220px;
  justify-content: center;
  text-align: center;
  white-space: normal;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.cloud-sync {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.cloud-sync strong {
  display: block;
  margin-bottom: 4px;
  color: var(--focus);
}

.language-grid,
.teacher-grid,
.portfolio-list,
.choice-grid {
  display: grid;
  gap: 10px;
}

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

.language-item,
.teacher-item,
.portfolio-item,
.choice-btn,
.note-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.language-item,
.teacher-item,
.portfolio-item,
.note-box {
  padding: 12px;
}

.language-item span,
.teacher-item span,
.portfolio-item span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.choice-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 12px;
}

.choice-btn {
  min-height: 56px;
  padding: 12px;
  color: var(--ink);
  text-align: left;
}

.choice-btn:hover {
  border-color: rgba(49, 95, 212, 0.3);
  background: #edfffb;
}

.choice-btn.correct {
  border-color: rgba(0, 155, 142, 0.7);
  background: #e5fbf3;
}

.choice-btn.wrong {
  border-color: rgba(227, 95, 79, 0.65);
  background: #fff1ef;
}

.writing-box,
.reflection-box {
  min-height: 122px;
  padding: 12px;
  resize: vertical;
  line-height: 1.65;
}

.reading-text {
  padding: 16px;
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
  background: #ecfffb;
  line-height: 1.9;
}

.status-line {
  min-height: 28px;
  margin-top: 12px;
  color: var(--focus);
  font-weight: 900;
}

.specialist-lab {
  display: grid;
  gap: 14px;
  margin-top: 18px;
  padding: 16px;
  border: 1px solid rgba(0, 155, 142, 0.28);
  border-radius: var(--radius);
  background: #f1fffb;
}

.grammar-lab {
  border-color: rgba(49, 95, 212, 0.24);
  background: #effffd;
}

.lab-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.muted-text {
  color: var(--muted);
  font-size: 13px;
  font-weight: 850;
}

.routine-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.routine-steps span {
  min-height: 38px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: #1f4d43;
  background: #fff;
  font-size: 12px;
  font-weight: 900;
  text-align: center;
}

.teacher-panel {
  display: grid;
  align-content: start;
  gap: 14px;
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 112px);
  overflow: auto;
}

.teacher-card,
.portfolio-card {
  padding: 16px;
}

.teacher-card h2,
.portfolio-card h2 {
  display: flex;
  align-items: center;
  gap: 8px;
}

.teacher-card h2::before,
.portfolio-card h2::before {
  display: inline-block;
  width: 8px;
  height: 24px;
  border-radius: 999px;
  background: var(--teal);
  content: "";
}

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

.progress-bars {
  display: grid;
  gap: 10px;
}

.bar-row {
  display: grid;
  gap: 5px;
}

.bar-label {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
  font-weight: 850;
}

.bar {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: #cfeae5;
}

.bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--amber));
}

.hidden {
  display: none !important;
}

.empty-state {
  padding: 30px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  color: var(--muted);
  background: #fff;
}

@keyframes studioFloat {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #062321;
    --paper: #0a302d;
    --surface: #0f3834;
    --surface-soft: #12433e;
    --ink: #e8fffb;
    --muted: #a3d4cc;
    --line: rgba(167, 234, 223, 0.16);
    --line-strong: rgba(167, 234, 223, 0.28);
    --navy: #05272e;
    --teal: #087b72;
    --mint: #164f47;
    --blue: #0b6e8a;
    --coral: #b93a30;
    --amber: #61e6d6;
    --lime: #7ef0c0;
    --focus: #73dece;
    --shadow: 0 18px 42px rgba(0, 0, 0, 0.32);
    --shadow-soft: 0 8px 20px rgba(0, 0, 0, 0.24);
  }

  body {
    background:
      radial-gradient(circle at 15% 9%, rgba(68, 212, 193, 0.16), transparent 30%),
      radial-gradient(circle at 86% 14%, rgba(53, 199, 220, 0.12), transparent 32%),
      linear-gradient(180deg, rgba(6, 35, 33, 0.98), rgba(7, 58, 53, 0.98)),
      linear-gradient(90deg, rgba(167, 234, 223, 0.045) 1px, transparent 1px),
      linear-gradient(180deg, rgba(167, 234, 223, 0.045) 1px, transparent 1px);
    background-size: auto, 56px 56px, 56px 56px;
  }

  .topbar,
  .track-panel,
  .teacher-card,
  .lesson-summary,
  .activity-card,
  .portfolio-card,
  .track-btn,
  .axis-btn,
  .language-item,
  .teacher-item,
  .portfolio-item,
  .choice-btn,
  .note-box,
  .routine-steps span,
  .search-box input,
  .writing-box,
  .reflection-box,
  .empty-state {
    background: var(--surface);
  }

  .lesson-summary {
    background:
      linear-gradient(90deg, rgba(68, 212, 193, 0.1), transparent 42%),
      var(--surface);
  }

  .top-meta span,
  .count-pill,
  .tag,
  .meta-pill {
    color: #dffdf8;
    border-color: rgba(68, 212, 193, 0.28);
    background: rgba(68, 212, 193, 0.14);
  }

  .ghost-btn {
    color: var(--ink);
    background: #103f3a;
  }

  .secondary-btn,
  .small-btn {
    color: #06211d;
    background: #a7eadf;
  }

  .axis-btn,
  .stage-btn,
  .choice-btn {
    color: var(--ink);
    border-color: rgba(167, 234, 223, 0.24);
  }

  .axis-btn:not(.active),
  .stage-btn:not(.active),
  .choice-btn {
    background: #123f3a;
  }

  .axis-btn.active,
  .stage-btn.active {
    color: #fff;
    background: var(--blue);
  }

  .primary-btn {
    color: #fff;
    background: var(--teal);
  }

  .danger-btn {
    color: #fff;
    background: var(--coral);
  }

  .track-btn.active,
  .stage-btn.done,
  .choice-btn.correct,
  .choice-btn.wrong,
  .reading-text,
  .specialist-lab,
  .grammar-lab {
    color: var(--ink);
  }

  .track-btn.active {
    background: linear-gradient(90deg, rgba(68, 212, 193, 0.14), var(--surface));
  }

  .metric,
  .stage-btn {
    background: var(--surface-soft);
  }

  .bar,
  .track-progress {
    background: rgba(237, 247, 244, 0.14);
  }
}

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

@media (max-width: 1280px) {
  .learner-hero {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.7fr);
  }

  .hero-stats {
    grid-column: 1 / -1;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .workspace {
    grid-template-columns: 290px minmax(0, 1fr);
  }

  .teacher-panel {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    position: static;
    max-height: none;
    overflow: visible;
  }
}

@media (max-width: 900px) {
  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .top-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .learner-hero,
  .workspace,
  .teacher-panel,
  .summary-grid,
  .language-grid,
  .choice-grid {
    grid-template-columns: 1fr;
  }

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

  .track-panel {
    position: static;
    max-height: none;
  }

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

@media (max-width: 560px) {
  .app-shell {
    padding: 10px;
  }

  .brand-lockup,
  .top-actions,
  .hero-actions,
  .action-row,
  .lab-heading,
  .activity-head {
    align-items: stretch;
    flex-direction: column;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
  }

  .topbar h1 {
    font-size: 22px;
  }

  .hero-copy h2 {
    font-size: 27px;
  }

  .hero-stats,
  .axis-filters,
  .routine-steps {
    grid-template-columns: 1fr;
  }

  .top-actions button,
  .hero-actions button,
  .action-row button {
    width: 100%;
  }

  .axis-btn,
  .stage-btn,
  .choice-btn,
  .primary-btn,
  .secondary-btn,
  .danger-btn,
  .ghost-btn {
    font-weight: 950;
    text-shadow: none;
  }

  .hero-visual {
    min-height: 210px;
  }

  .floating-card {
    position: static;
    width: 100%;
    margin-top: 8px;
  }

  .lesson-title {
    font-size: 24px;
  }
}