:root {
  --sage-50: #f6f8f6;
  --sage-100: #e8efe8;
  --sage-200: #d1dfd1;
  --sage-500: #5f8560;
  --sage-600: #4a6a4b;
  --sage-700: #3d553e;
  --sage-800: #334533;
  --coral-50: #fef7f4;
  --coral-100: #fdeee8;
  --coral-500: #e66d42;
  --coral-700: #b14223;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --shadow-soft: 0 4px 24px -4px rgba(95, 133, 96, 0.12);
  --shadow-card: 0 2px 16px -2px rgba(26, 35, 50, 0.08);
  --radius: 1rem;
  --font-display: "Fraunces", Georgia, serif;
  --font-sans: "Inter", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--slate-800);
  background: linear-gradient(135deg, #f6f8f6 0%, #fdeee8 50%, #f0f4ff 100%);
  min-height: 100vh;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Layout */
.section-container {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

main {
  flex: 1;
}

/* Nav */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--sage-100);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.75rem;
  background: var(--sage-500);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
  box-shadow: var(--shadow-soft);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--sage-800);
}

.logo-sub {
  font-size: 0.65rem;
  color: var(--sage-500);
  display: block;
  margin-top: -2px;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-600);
  transition: background 0.2s, color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--sage-100);
  color: var(--sage-700);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  font-family: inherit;
  font-size: 0.875rem;
  border-radius: 0.75rem;
  padding: 0.625rem 1.25rem;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--sage-500);
  color: white;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  background: var(--sage-600);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--sage-200);
  color: var(--sage-700);
}

.btn-outline:hover {
  background: var(--sage-50);
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 0.75rem;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.8rem;
  border-radius: 0.65rem;
}

.btn-block {
  width: 100%;
}

.menu-toggle {
  display: block;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--slate-600);
}

.mobile-nav {
  display: none;
  padding-bottom: 1rem;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav a {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  color: var(--slate-600);
}

.mobile-nav a:hover {
  background: var(--sage-50);
}

.nav-auth-slot,
.mobile-auth-slot {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-account-card,
.mobile-account-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--sage-100);
  border-radius: 1rem;
  box-shadow: var(--shadow-card);
}

.nav-account-card {
  padding: 0.4rem 0.5rem 0.4rem 0.4rem;
}

.mobile-account-card {
  width: 100%;
  justify-content: space-between;
  padding: 0.85rem 0.9rem;
}

.nav-account-summary {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.nav-avatar {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 9999px;
  background: linear-gradient(135deg, var(--sage-500), var(--sage-700));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
  flex-shrink: 0;
}

.nav-account-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.nav-user {
  font-size: 0.82rem;
  color: var(--sage-800);
  font-weight: 600;
  max-width: 10rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-user-email {
  font-size: 0.72rem;
  color: var(--slate-500);
  max-width: 10rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-account-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
  .logo-sub {
    display: block;
  }
}

@media (max-width: 767px) {
  .mobile-account-card {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-account-actions {
    width: 100%;
  }

  .nav-account-actions .btn {
    flex: 1;
  }
}

/* Cards */
.glass-card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--sage-800);
  margin-bottom: 0.75rem;
}

/* Hero */
.hero {
  position: relative;
  padding: 4rem 0 6rem;
  background: linear-gradient(160deg, #f6f8f6 0%, #e8efe8 40%, #fdeee8 100%);
  overflow: hidden;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}

.hero-blob-1 {
  width: 24rem;
  height: 24rem;
  background: rgba(209, 223, 209, 0.4);
  top: -6rem;
  right: -6rem;
}

.hero-blob-2 {
  width: 24rem;
  height: 24rem;
  background: rgba(251, 217, 204, 0.4);
  bottom: -6rem;
  left: -6rem;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 48rem;
  margin: 0 auto;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--sage-200);
  font-size: 0.875rem;
  color: var(--sage-700);
  margin-bottom: 1.5rem;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--sage-800);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(to right, var(--sage-600), var(--sage-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lead {
  font-size: 1.125rem;
  color: var(--slate-600);
  max-width: 36rem;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: center;
}

@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
  }
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 1.875rem;
  color: var(--sage-800);
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--slate-600);
  max-width: 36rem;
  margin: 0 auto;
}

.grid-2 {
  display: grid;
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  .grid-lg-3 {
    grid-template-columns: 1fr 2fr;
  }
  .grid-lg-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Feature cards */
.feature-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.feature-icon.sage {
  background: var(--sage-100);
}
.feature-icon.blue {
  background: #dbeafe;
}
.feature-icon.coral {
  background: var(--coral-100);
}
.feature-icon.purple {
  background: #f3e8ff;
}

.glass-card p {
  font-size: 0.875rem;
  color: var(--slate-500);
}

.revision-task-list {
  display: grid;
  gap: 1rem;
}

.revision-task-card {
  border: 1px solid var(--sage-100);
}

.revision-task-card.compact {
  padding: 1rem 1.1rem;
}

.revision-task-card.resolved {
  border-color: var(--sage-500);
  background: linear-gradient(135deg, rgba(232, 239, 232, 0.9), rgba(255, 255, 255, 0.95));
}

.revision-task-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.revision-task-header h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--sage-800);
}

.revision-task-meta {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.revision-task-order,
.score-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sage-500);
  font-weight: 700;
}

.revision-task-location {
  font-size: 0.78rem;
  color: var(--slate-500);
  margin-bottom: 0.8rem;
}

.revision-task-block {
  margin-bottom: 0.75rem;
}

.revision-task-block strong {
  display: block;
  font-size: 0.82rem;
  color: var(--sage-800);
  margin-bottom: 0.15rem;
}

.revision-task-block p {
  color: var(--slate-600);
}

.revision-action-block {
  background: var(--coral-50);
  border: 1px solid var(--coral-100);
  border-radius: 0.9rem;
  padding: 0.8rem 0.9rem;
}

.revision-checkline {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.85rem;
  color: var(--sage-800);
  font-weight: 500;
}

.revision-checkline input {
  width: 1rem;
  height: 1rem;
}

.checklist-summary-card,
.score-comparison-card,
.score-closure-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.checklist-progress {
  min-width: 7rem;
  text-align: center;
  background: var(--sage-50);
  border: 1px solid var(--sage-100);
  border-radius: 1rem;
  padding: 0.8rem 1rem;
}

.checklist-progress strong {
  display: block;
  font-size: 1.35rem;
  color: var(--sage-800);
}

.checklist-progress span,
.score-comparison-note,
.score-closure-hint {
  font-size: 0.82rem;
  color: var(--slate-500);
}

.score-comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  width: 100%;
}

.score-number {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--sage-800);
  line-height: 1.1;
}

.score-number.positive {
  color: var(--sage-600);
}

.score-number.negative {
  color: var(--coral-700);
}

@media (max-width: 767px) {
  .revision-task-header,
  .checklist-summary-card,
  .score-comparison-card,
  .score-closure-card {
    flex-direction: column;
    align-items: stretch;
  }

  .score-comparison-grid {
    grid-template-columns: 1fr;
  }
}

/* Steps */
.steps {
  display: grid;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .steps {
    grid-template-columns: repeat(5, 1fr);
  }
}

.step-item {
  text-align: center;
}

.step-icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1rem;
  border-radius: 1rem;
  background: var(--sage-500);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-soft);
}

.step-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--sage-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.step-item h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  margin: 0.25rem 0 0.5rem;
  color: var(--sage-800);
}

/* CTA */
.cta-box {
  background: linear-gradient(135deg, var(--sage-50), var(--coral-50));
  text-align: center;
  padding: 2.5rem 1.5rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--sage-100);
  background: rgba(255, 255, 255, 0.5);
  padding: 2.5rem 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer h3,
.footer h4 {
  font-family: var(--font-display);
  margin-bottom: 0.5rem;
  color: var(--sage-800);
}

.footer p,
.footer li {
  font-size: 0.875rem;
  color: var(--slate-500);
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 0.5rem;
}

.footer ul a:hover {
  color: var(--sage-600);
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--sage-100);
  font-size: 0.875rem;
  color: var(--slate-400);
}

/* Page header */
.page-header {
  padding: 2.5rem 0 2rem;
}

.page-header .step-label {
  margin-bottom: 0.5rem;
}

.page-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--slate-600);
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* Forms */
label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-700);
  margin-bottom: 0.375rem;
}

input[type="text"],
textarea,
select {
  width: 100%;
  padding: 0.625rem 1rem;
  border: 1px solid var(--sage-200);
  border-radius: 0.75rem;
  font-family: inherit;
  font-size: 0.875rem;
  background: white;
  transition: box-shadow 0.2s;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(95, 133, 96, 0.25);
}

textarea {
  resize: vertical;
  line-height: 1.7;
}

.form-group {
  margin-bottom: 1rem;
}

.task-toggle {
  display: flex;
  gap: 0.75rem;
}

.task-btn {
  flex: 1;
  padding: 0.625rem;
  border-radius: 0.75rem;
  border: 1px solid var(--sage-200);
  background: white;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-600);
  transition: all 0.2s;
}

.task-btn.active {
  background: var(--sage-500);
  color: white;
  border-color: var(--sage-500);
}

.word-count {
  font-size: 0.875rem;
  color: var(--slate-400);
}

.word-count.warn {
  color: #d97706;
}

.error-box {
  padding: 1rem;
  border-radius: 0.75rem;
  background: var(--coral-50);
  color: var(--coral-700);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.success-box {
  padding: 1rem;
  border-radius: 0.75rem;
  background: var(--sage-50);
  color: var(--sage-700);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.hint-text {
  font-size: 0.75rem;
  color: var(--slate-400);
  margin-top: 0.75rem;
}

/* Badges */
.badge {
  display: inline-flex;
  padding: 0.125rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-default {
  background: #f1f5f9;
  color: var(--slate-600);
}
.badge-success {
  background: var(--sage-100);
  color: var(--sage-700);
}
.badge-warning {
  background: #fef3c7;
  color: #b45309;
}
.badge-danger {
  background: var(--coral-100);
  color: var(--coral-700);
}

.badge-grammar {
  background: #dbeafe;
  color: #1d4ed8;
}
.badge-vocab {
  background: #f3e8ff;
  color: #7c3aed;
}
.badge-coherence {
  background: var(--sage-100);
  color: var(--sage-700);
}
.badge-logic {
  background: #fef3c7;
  color: #b45309;
}
.badge-task {
  background: var(--coral-100);
  color: var(--coral-700);
}

/* Progress */
.progress-bar {
  height: 0.625rem;
  background: var(--sage-100);
  border-radius: 9999px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.progress-fill {
  height: 100%;
  background: var(--sage-500);
  border-radius: 9999px;
  transition: width 0.7s ease;
}

.band-score {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--sage-800);
}

/* Issues */
.issue-card {
  margin-bottom: 1rem;
}

.issue-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.issue-header h4 {
  font-weight: 500;
  color: var(--slate-800);
}

.suggestion-box {
  padding: 0.75rem;
  background: var(--sage-50);
  border: 1px solid var(--sage-100);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  margin: 0.75rem 0;
}

.reflective {
  display: flex;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--coral-700);
  font-style: italic;
}

/* Hints */
.layer-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.layer-tab {
  flex: 1;
  padding: 0.5rem;
  border-radius: 0.75rem;
  border: none;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  background: #f1f5f9;
  color: var(--slate-400);
  transition: all 0.2s;
}

.layer-tab.active {
  background: var(--sage-500);
  color: white;
}

.layer-tab.done {
  background: var(--sage-100);
  color: var(--sage-700);
}

.hint-card {
  margin-bottom: 1rem;
  opacity: 1;
}

.hint-card.locked {
  opacity: 0.6;
  background: #f8fafc;
}

.hint-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hint-icon.unlocked {
  background: #fef3c7;
}
.hint-icon.locked {
  background: #e2e8f0;
}

.hint-inner {
  display: flex;
  gap: 0.75rem;
}

.unlock-btn {
  width: 100%;
  padding: 0.75rem;
  border: 2px dashed var(--sage-300);
  border-radius: 0.75rem;
  background: transparent;
  color: var(--sage-600);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  margin-top: 1rem;
}

.unlock-btn:hover {
  background: var(--sage-50);
}

/* Stats */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

@media (min-width: 1024px) {
  .stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--sage-800);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--slate-500);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 3rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--sage-200);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline-dot {
  position: absolute;
  left: -2.05rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--sage-500);
  border: 3px solid white;
  box-shadow: var(--shadow-soft);
}

/* Charts (simple CSS bars) */
.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  height: 12rem;
  padding-top: 1rem;
}

.chart-bar-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.chart-bar {
  width: 100%;
  max-width: 2rem;
  border-radius: 0.25rem 0.25rem 0 0;
  transition: height 0.5s ease;
}

.chart-bar.grammar {
  background: var(--sage-500);
}
.chart-bar.vocab {
  background: var(--coral-500);
}
.chart-bar.coherence {
  background: #6366f1;
}

.chart-label {
  font-size: 0.65rem;
  color: var(--slate-400);
  text-align: center;
}

.mistake-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
}

.mistake-bar-wrap {
  width: 8rem;
  height: 0.5rem;
  background: var(--sage-100);
  border-radius: 9999px;
  overflow: hidden;
}

.mistake-bar {
  height: 100%;
  background: var(--coral-400);
  border-radius: 9999px;
}

/* Teacher */
.student-list-item {
  width: 100%;
  text-align: left;
  padding: 1rem;
  border-radius: 0.75rem;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  margin-bottom: 0.5rem;
  transition: background 0.2s;
}

.student-list-item:hover {
  background: var(--sage-50);
}

.student-list-item.selected {
  background: var(--sage-100);
  border-color: var(--sage-200);
}

/* Loading */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.spinner {
  width: 2.5rem;
  height: 2.5rem;
  border: 3px solid var(--sage-200);
  border-top-color: var(--sage-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.hidden {
  display: none !important;
}

.mb-4 {
  margin-bottom: 1rem;
}
.mb-6 {
  margin-bottom: 1.5rem;
}
.mb-8 {
  margin-bottom: 2rem;
}
.mt-4 {
  margin-top: 1rem;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.strength-list,
.priority-list {
  list-style: none;
}

.strength-list li,
.priority-list li {
  display: flex;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--slate-600);
  margin-bottom: 0.5rem;
}

.priority-num {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--sage-100);
  color: var(--sage-700);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.coach-message {
  background: linear-gradient(135deg, var(--coral-50), white);
  border-color: var(--coral-100);
}

.vocab-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--sage-50);
  font-size: 0.875rem;
}

.version-tag {
  font-size: 0.7rem;
  padding: 0.125rem 0.5rem;
  border-radius: 0.375rem;
  background: var(--sage-50);
  color: var(--sage-600);
  margin-right: 0.25rem;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--slate-500);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

/* ── v2: Multi-round, comparison, reflection ── */

.round-timeline {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 1rem 0;
  margin-bottom: 1.5rem;
}

.round-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 5rem;
  position: relative;
}

.round-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 1rem;
  left: 60%;
  width: 80%;
  height: 2px;
  background: var(--sage-200);
  z-index: 0;
}

.round-dot {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--sage-100);
  border: 2px solid var(--sage-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--sage-600);
  position: relative;
  z-index: 1;
}

.round-step.active .round-dot {
  background: var(--sage-500);
  border-color: var(--sage-500);
  color: white;
}

.round-step.done .round-dot {
  background: var(--sage-100);
  border-color: var(--sage-500);
  color: var(--sage-700);
}

.round-label {
  font-size: 0.65rem;
  color: var(--slate-500);
  margin-top: 0.375rem;
  text-align: center;
}

.round-band {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--sage-700);
}

.band-delta {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
}

.band-delta.positive {
  background: var(--sage-100);
  color: var(--sage-700);
}

.band-delta.negative {
  background: var(--coral-100);
  color: var(--coral-700);
}

.band-delta.neutral {
  background: #f1f5f9;
  color: var(--slate-500);
}

.deduction-list {
  list-style: none;
  margin-top: 0.5rem;
}

.deduction-list li {
  font-size: 0.75rem;
  color: var(--slate-600);
  padding: 0.375rem 0;
  border-bottom: 1px solid var(--sage-50);
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}

.deduction-impact {
  color: var(--coral-600);
  font-weight: 600;
  white-space: nowrap;
}

.expand-panel {
  border: 1px solid var(--sage-100);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.expand-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.875rem 1rem;
  background: white;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-700);
  text-align: left;
}

.expand-header:hover {
  background: var(--sage-50);
}

.expand-body {
  display: none;
  padding: 0 1rem 1rem;
  font-size: 0.875rem;
  color: var(--slate-600);
}

.expand-panel.open .expand-body {
  display: block;
}

.expand-panel.open .expand-chevron {
  transform: rotate(180deg);
}

.expand-chevron {
  transition: transform 0.2s;
  color: var(--slate-400);
}

.compare-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .compare-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.compare-col {
  background: white;
  border: 1px solid var(--sage-100);
  border-radius: 0.75rem;
  padding: 1rem;
}

.compare-col.revised {
  border-color: var(--sage-300);
  background: var(--sage-50);
}

.compare-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--sage-700);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--sage-100);
}

.compare-text {
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--slate-700);
  white-space: pre-wrap;
}

.explanation-card {
  border-left: 3px solid var(--sage-500);
  padding: 1rem;
  margin-bottom: 1rem;
  background: white;
  border-radius: 0 0.75rem 0.75rem 0;
  box-shadow: var(--shadow-card);
}

.explanation-card .issue-type {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sage-500);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.explanation-row {
  display: grid;
  gap: 0.75rem;
  margin: 0.75rem 0;
}

@media (min-width: 768px) {
  .explanation-row {
    grid-template-columns: 1fr 1fr;
  }
}

.explanation-block {
  padding: 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  line-height: 1.6;
}

.explanation-block.original {
  background: #fef2f2;
  border: 1px solid #fecaca;
}

.explanation-block.revised {
  background: var(--sage-50);
  border: 1px solid var(--sage-200);
}

.explanation-block .label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
  opacity: 0.7;
}

.error-highlight {
  background: #fef08a;
  padding: 0.1em 0.2em;
  border-radius: 0.2em;
  cursor: help;
}

.error-explorer {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .error-explorer {
    grid-template-columns: 240px 1fr;
  }
}

.error-cat-btn {
  width: 100%;
  text-align: left;
  padding: 0.75rem 1rem;
  border: 1px solid var(--sage-100);
  border-radius: 0.75rem;
  background: white;
  cursor: pointer;
  margin-bottom: 0.5rem;
  font-family: inherit;
  transition: all 0.2s;
}

.error-cat-btn:hover,
.error-cat-btn.active {
  background: var(--sage-50);
  border-color: var(--sage-300);
}

.error-cat-btn .count {
  float: right;
  font-size: 0.75rem;
  color: var(--slate-400);
}

.error-detail-card {
  padding: 1rem;
  border: 1px solid var(--sage-100);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
  cursor: pointer;
  transition: box-shadow 0.2s;
}

.error-detail-card:hover,
.error-detail-card.selected {
  box-shadow: var(--shadow-soft);
  border-color: var(--sage-300);
}

.error-detail-card .excerpt {
  font-size: 0.8125rem;
  font-style: italic;
  color: var(--slate-500);
  margin: 0.5rem 0;
  padding: 0.5rem;
  background: #fffbeb;
  border-radius: 0.375rem;
}

.expression-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 0.875rem;
  border: 1px solid var(--sage-100);
  border-radius: 0.75rem;
  margin-bottom: 0.5rem;
  gap: 0.75rem;
}

.expression-card.saved {
  border-color: var(--sage-300);
  background: var(--sage-50);
}

.save-expr-btn {
  padding: 0.25rem 0.625rem;
  border-radius: 0.5rem;
  border: 1px solid var(--sage-200);
  background: white;
  font-size: 0.75rem;
  cursor: pointer;
  white-space: nowrap;
}

.save-expr-btn.saved {
  background: var(--sage-500);
  color: white;
  border-color: var(--sage-500);
}

.weakness-card {
  padding: 1rem;
  border-radius: 0.75rem;
  background: white;
  border: 1px solid var(--sage-100);
  margin-bottom: 0.75rem;
}

.weakness-card .pattern {
  font-weight: 600;
  color: var(--slate-800);
}

.weakness-card .freq {
  font-size: 0.75rem;
  color: var(--coral-600);
}

.score-progression {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  height: 8rem;
  padding: 1rem 0;
}

.score-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.score-bar {
  width: 2.5rem;
  background: linear-gradient(to top, var(--sage-500), var(--sage-400));
  border-radius: 0.375rem 0.375rem 0 0;
  min-height: 1rem;
  transition: height 0.6s ease;
}

.score-bar-label {
  font-size: 0.65rem;
  color: var(--slate-400);
  text-align: center;
}

.workflow-banner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--sage-50);
  border-radius: 0.75rem;
  margin-bottom: 1.5rem;
  font-size: 0.8125rem;
}

.workflow-step {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--slate-500);
}

.workflow-step.active {
  color: var(--sage-700);
  font-weight: 600;
}

.workflow-step.done {
  color: var(--sage-600);
}

.btn-secondary {
  background: var(--coral-100);
  color: var(--coral-700);
}

.btn-secondary:hover {
  background: var(--coral-200);
}

.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.25rem;
  background: linear-gradient(135deg, var(--sage-50), white);
  border: 1px solid var(--sage-200);
  border-radius: 1rem;
  margin-top: 1.5rem;
}

.action-bar p {
  width: 100%;
  font-size: 0.875rem;
  color: var(--slate-600);
  margin-bottom: 0.25rem;
}

.band-note {
  font-size: 0.75rem;
  color: var(--slate-400);
  margin-top: 0.25rem;
}

.criterion-card {
  margin-bottom: 1rem;
}

.advice-box {
  margin-top: 0.5rem;
  padding: 0.625rem;
  background: #eff6ff;
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  color: #1e40af;
}

.tab-bar {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--sage-100);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.tab-btn {
  padding: 0.625rem 1rem;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--slate-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.tab-btn.active {
  color: var(--sage-700);
  border-bottom-color: var(--sage-500);
  font-weight: 600;
}