/* ===== SNT English — Design System ===== */
:root {
  --bg: #0b1020;
  --bg-elevated: #121a2f;
  --bg-card: #162038;
  --bg-soft: #1c2744;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);
  --text: #e8eefc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-soft: rgba(59, 130, 246, 0.15);
  --accent: #22d3ee;
  --success: #34d399;
  --success-soft: rgba(52, 211, 153, 0.15);
  --warning: #fbbf24;
  --danger: #f87171;
  --gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 50%, #8b5cf6 100%);
  --gradient-soft: linear-gradient(135deg, rgba(59,130,246,.2), rgba(6,182,212,.12));
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --font: "DM Sans", system-ui, sans-serif;
  --font-display: "Instrument Serif", Georgia, serif;
  --nav-w: 260px;
  --header-h: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button, input { font-family: inherit; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Boot ===== */
.boot-screen {
  min-height: 100vh;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 1rem;
  color: var(--text-muted);
}
.boot-logo {
  width: 72px;
  height: 72px;
  margin: 0 auto;
  border-radius: 20px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.25rem;
  color: white;
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.85; }
}

/* ===== Login ===== */
.login-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  background:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(59,130,246,.25), transparent 50%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(139,92,246,.18), transparent 50%),
    var(--bg);
}

.login-hero {
  padding: 3.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
}

.login-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  width: fit-content;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid rgba(59,130,246,.35);
  color: #93c5fd;
  font-size: 0.85rem;
  font-weight: 500;
}

.login-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.login-hero h1 em {
  font-style: italic;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.login-hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 32rem;
}

.login-stats {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.stat-pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 1.1rem;
  min-width: 110px;
}

.stat-pill strong {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}

.stat-pill span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.login-panel-wrap {
  display: grid;
  place-items: center;
  padding: 2rem;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.login-card h2 {
  font-size: 1.45rem;
  margin-bottom: 0.35rem;
}

.login-card .subtitle {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
}

.tab-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 0.65rem;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: 0.15s ease;
}

.tab-btn.active {
  background: var(--bg-soft);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}

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

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-group input {
  width: 100%;
  padding: 0.8rem 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.8rem 1.2rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: 0.15s ease;
}

.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
}

.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg-soft);
  color: var(--text);
}

.btn-sm {
  padding: 0.45rem 0.8rem;
  font-size: 0.82rem;
}

.btn-success {
  background: var(--success);
  color: #064e3b;
}

.form-error {
  background: rgba(248,113,113,.12);
  border: 1px solid rgba(248,113,113,.35);
  color: #fecaca;
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.demo-hint {
  margin-top: 1.25rem;
  padding: 0.9rem;
  background: var(--bg);
  border-radius: 12px;
  border: 1px dashed var(--border-strong);
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.demo-hint code {
  background: var(--bg-soft);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: #93c5fd;
  font-size: 0.8rem;
}

/* ===== Shell (logged in) ===== */
.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--nav-w) 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1rem;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.25rem 0.5rem 1.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.75rem;
  color: white;
  flex-shrink: 0;
}

.brand-text strong {
  display: block;
  font-size: 0.95rem;
}

.brand-text span {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.nav-section-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 0.5rem 0.65rem;
  font-weight: 600;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 0.75rem;
  border-radius: 10px;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  transition: 0.12s ease;
}

.nav-link:hover {
  background: var(--bg-soft);
  color: var(--text);
  text-decoration: none;
}

.nav-link.active {
  background: var(--primary-soft);
  color: #93c5fd;
}

.nav-link .icon { font-size: 1.05rem; width: 1.25rem; text-align: center; }

.sidebar-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem;
  border-radius: 12px;
  background: var(--bg);
  margin-bottom: 0.65rem;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: white;
  flex-shrink: 0;
}

.user-chip .meta { min-width: 0; }
.user-chip .meta strong {
  display: block;
  font-size: 0.88rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-chip .meta span {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  gap: 1rem;
}

.topbar h1 {
  font-size: 1.05rem;
  font-weight: 600;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.breadcrumb button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font: inherit;
  padding: 0;
}

.breadcrumb button:hover { color: var(--accent); }
.breadcrumb .current { color: var(--text); font-weight: 600; }
.breadcrumb .sep { color: var(--text-dim); }

.content {
  padding: 1.75rem 1.75rem 3rem;
  max-width: 1100px;
  width: 100%;
}

/* ===== Dashboard ===== */
.hero-banner {
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1.75rem;
  position: relative;
  overflow: hidden;
}

.hero-banner::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,.35), transparent 70%);
  pointer-events: none;
}

.hero-banner h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 0.4rem;
}

.hero-banner p {
  color: var(--text-muted);
  max-width: 40rem;
  margin-bottom: 1.1rem;
}

.progress-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.progress-bar {
  flex: 1;
  min-width: 160px;
  height: 10px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-bar > i {
  display: block;
  height: 100%;
  background: var(--gradient);
  border-radius: 999px;
  transition: width 0.4s ease;
}

.progress-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.module-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  text-align: left;
  color: inherit;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.module-card:hover {
  transform: translateY(-2px);
  border-color: rgba(59,130,246,.45);
  box-shadow: 0 12px 28px rgba(0,0,0,.25);
}

.module-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.module-num {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #93c5fd;
  font-size: 0.95rem;
}

.level-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: rgba(34,211,238,.1);
  color: #67e8f9;
  border: 1px solid rgba(34,211,238,.25);
}

.module-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.3;
}

.module-card .desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.module-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-top: 0.35rem;
  border-top: 1px solid var(--border);
}

.module-meta .done {
  color: var(--success);
  font-weight: 600;
}

/* ===== Module detail ===== */
.module-header {
  margin-bottom: 1.75rem;
}

.module-header .level-tag { margin-bottom: 0.75rem; display: inline-block; }

.module-header h2 {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.module-header .presentation {
  color: var(--text-muted);
  max-width: 48rem;
  margin-bottom: 1rem;
}

.objectives-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  margin-bottom: 1.75rem;
}

.objectives-box h3 {
  font-size: 0.95rem;
  margin-bottom: 0.65rem;
}

.objectives-box ul {
  padding-left: 1.15rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.objectives-box li { margin-bottom: 0.3rem; }

.lessons-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.lesson-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  cursor: pointer;
  transition: 0.12s ease;
  text-align: left;
  color: inherit;
  width: 100%;
}

.lesson-row:hover {
  border-color: rgba(59,130,246,.4);
  background: var(--bg-soft);
}

.lesson-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #93c5fd;
}

.lesson-num.completed {
  background: var(--success-soft);
  border-color: rgba(52,211,153,.4);
  color: var(--success);
}

.lesson-info h4 {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.lesson-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.lesson-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 600;
}

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

.badge-todo {
  background: var(--primary-soft);
  color: #93c5fd;
}

/* ===== Lesson view ===== */
.lesson-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 1.5rem;
  align-items: start;
}

.lesson-main {
  min-width: 0;
}

.lesson-title-block {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.lesson-title-block h2 {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 400;
  margin: 0.4rem 0 0.65rem;
}

.lesson-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

/* Markdown content */
.markdown-body {
  font-size: 0.98rem;
  color: var(--text);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin: 1.6rem 0 0.65rem;
  line-height: 1.3;
  font-weight: 600;
}

.markdown-body h3 { font-size: 1.25rem; color: #bfdbfe; }
.markdown-body h4 {
  font-size: 1.05rem;
  color: #a5f3fc;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.75rem;
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  margin-top: 1.75rem;
}

.markdown-body p { margin-bottom: 0.85rem; color: #cbd5e1; }

.markdown-body ul, .markdown-body ol {
  margin: 0 0 1rem 1.25rem;
  color: #cbd5e1;
}

.markdown-body li { margin-bottom: 0.35rem; }

.markdown-body strong { color: var(--text); font-weight: 600; }

.markdown-body em { color: #e2e8f0; }

.markdown-body code {
  background: var(--bg-soft);
  padding: 0.12rem 0.4rem;
  border-radius: 5px;
  font-size: 0.88em;
  color: #fde68a;
}

.markdown-body pre {
  background: #0a0f1c;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.markdown-body blockquote {
  border-left: 3px solid var(--primary);
  padding: 0.65rem 1rem;
  margin: 1rem 0;
  background: var(--primary-soft);
  border-radius: 0 10px 10px 0;
  color: #bfdbfe;
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.75rem 0;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.markdown-body th, .markdown-body td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.75rem;
  text-align: left;
}

.markdown-body th {
  background: var(--bg-soft);
  color: var(--text);
}

/* Dialogue highlight — bold speaker names already via strong */

.lesson-toc {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.lesson-toc h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.toc-link {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 0.4rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 0.15rem;
}

.toc-link:hover {
  background: var(--bg-soft);
  color: var(--text);
}

.nav-lessons {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

/* ===== Profile ===== */
.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 480px;
}

.profile-card h2 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.profile-row {
  display: flex;
  justify-content: space-between;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

.profile-row span { color: var(--text-muted); }
.profile-row strong { color: var(--text); }

/* ===== Empty / error ===== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.locked-state .lock-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.locked-state h2 {
  color: var(--text);
  margin-bottom: 0.5rem;
}

/* ===== Phase A: Continue card ===== */
.continue-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(52,211,153,.12), rgba(59,130,246,.12));
  border: 1px solid rgba(52,211,153,.3);
  border-radius: var(--radius);
  padding: 1.15rem 1.35rem;
  margin-bottom: 1.5rem;
}

.continue-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--success);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.continue-card strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.continue-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin: 0;
}

/* ===== Locked modules / lessons ===== */
.module-card.is-locked,
.lesson-row.is-locked {
  opacity: 0.55;
  cursor: not-allowed;
}

.module-card.is-locked:hover {
  transform: none;
  border-color: var(--border);
  box-shadow: none;
}

.lesson-num.locked {
  color: var(--text-dim);
  border-style: dashed;
}

.badge-locked {
  background: rgba(100,116,139,.15);
  color: var(--text-dim);
}

/* ===== Exercises ===== */
.lesson-section-block {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.section-block-title {
  font-size: 1.25rem;
  margin-bottom: 0.35rem;
  color: #a5f3fc;
}

.section-block-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.15rem;
}

.ex-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  margin-bottom: 1rem;
}

.ex-card-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.ex-card-head h4 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  background: none;
  border: none;
  padding: 0;
}

.ex-num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: #93c5fd;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.ex-item {
  margin-bottom: 0.9rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.ex-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.ex-prompt {
  color: #cbd5e1;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 0.4rem;
}

.ex-label {
  color: var(--text-dim);
  font-weight: 600;
  margin-right: 0.25rem;
}

.ex-input {
  display: inline-block;
  min-width: 5.5rem;
  max-width: 12rem;
  margin: 0 0.2rem;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-size: 0.92rem;
  outline: none;
  vertical-align: baseline;
}

.ex-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-soft);
}

.ex-input.is-correct {
  border-color: var(--success);
  background: var(--success-soft);
}

.ex-input.is-wrong {
  border-color: var(--danger);
  background: rgba(248,113,113,.12);
}

.ex-input-full {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 0.35rem 0 0;
  padding: 0.65rem 0.8rem;
}

.ex-textarea {
  width: 100%;
  margin-top: 0.65rem;
  padding: 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
  resize: vertical;
  outline: none;
}

.ex-textarea:focus {
  border-color: var(--primary);
}

.ex-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
}

.ex-score {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: auto;
}

.ex-feedback {
  margin-top: 0.4rem;
  font-size: 0.82rem;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
}

.ex-feedback.is-ok {
  background: var(--success-soft);
  color: var(--success);
}

.ex-feedback.is-bad {
  background: rgba(248,113,113,.12);
  color: #fecaca;
}

.match-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.65rem;
  padding: 0.5rem;
  border-radius: 10px;
  border: 1px solid transparent;
}

.match-row.is-correct {
  border-color: rgba(52,211,153,.4);
  background: var(--success-soft);
}

.match-row.is-wrong {
  border-color: rgba(248,113,113,.4);
  background: rgba(248,113,113,.08);
}

.match-left {
  font-size: 0.9rem;
  color: #cbd5e1;
}

.ex-select {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
}

.ex-sample {
  margin-top: 0.75rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.ex-sample summary {
  cursor: pointer;
  color: #93c5fd;
  font-weight: 600;
}

.ex-sample-body {
  margin-top: 0.5rem;
  padding: 0.75rem;
  background: var(--bg);
  border-radius: 8px;
  border: 1px solid var(--border);
  color: #cbd5e1;
  line-height: 1.55;
}

.answer-key {
  margin-top: 1.25rem;
  background: var(--bg-soft);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
}

.answer-key summary {
  cursor: pointer;
  font-weight: 600;
  color: #fde68a;
  list-style: none;
}

.answer-key summary::-webkit-details-marker { display: none; }

.answer-key-body {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
}

.ex-empty {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.toc-hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0.65rem 0;
}

/* ===== Flashcards ===== */
.fc-wrap {
  max-width: 560px;
  margin: 0 auto;
}

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

.fc-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  margin: 0 0 0.25rem;
}

.fc-sub {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin: 0;
}

.fc-toolbar-actions {
  display: flex;
  gap: 0.4rem;
}

.fc-progress-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.fc-card {
  width: 100%;
  min-height: 260px;
  border: none;
  background: transparent;
  perspective: 1000px;
  cursor: pointer;
  padding: 0;
  margin-bottom: 1.25rem;
}

.fc-card-inner {
  position: relative;
  width: 100%;
  min-height: 260px;
  transition: transform 0.45s ease;
  transform-style: preserve-3d;
}

.fc-card-inner.is-flipped {
  transform: rotateY(180deg);
}

.fc-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 20px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  gap: 0.75rem;
}

.fc-front {
  background: linear-gradient(160deg, #162038, #1c2744);
  box-shadow: var(--shadow);
}

.fc-back {
  background: linear-gradient(160deg, #0f2a24, #163248);
  transform: rotateY(180deg);
  border-color: rgba(52,211,153,.35);
}

.fc-hint {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-weight: 600;
}

.fc-term {
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  font-weight: 600;
  text-align: center;
  color: var(--text);
  line-height: 1.35;
}

.fc-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.fc-know {
  display: flex;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: 0.65rem;
}

.fc-known-label {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ===== Phase B: sync / PWA / cloud ===== */
.sync-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.sync-local {
  background: var(--bg-soft);
  color: var(--text-muted);
}

.sync-ok {
  background: var(--success-soft);
  color: var(--success);
  border-color: rgba(52, 211, 153, 0.35);
}

.sync-busy {
  background: var(--primary-soft);
  color: #93c5fd;
  border-color: rgba(59, 130, 246, 0.35);
}

.sync-err {
  background: rgba(248, 113, 113, 0.12);
  color: #fecaca;
  border-color: rgba(248, 113, 113, 0.35);
}

.sync-row {
  margin-bottom: 0.55rem;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.topbar-title { display: none; }

@media (min-width: 700px) {
  .topbar-title { display: inline; }
}

.mode-pill {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-radius: 10px;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
}

.mode-pill.is-cloud {
  background: var(--success-soft);
  color: var(--success);
  border-color: rgba(52, 211, 153, 0.35);
}

.mode-pill.is-local {
  background: var(--bg);
  color: var(--text-muted);
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.profile-actions .btn {
  width: auto;
}

.profile-hint {
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.profile-hint code {
  background: var(--bg-soft);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: #93c5fd;
  font-size: 0.78rem;
}

.sync-toast {
  margin-top: 0.85rem;
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  font-size: 0.88rem;
}

.sync-toast.is-ok {
  background: var(--success-soft);
  color: var(--success);
}

.sync-toast.is-err {
  background: rgba(248, 113, 113, 0.12);
  color: #fecaca;
}

/* ===== Phase C: landing / paywall / cert / admin ===== */
.linkish {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  text-decoration: underline;
  padding: 0;
}

.landing {
  min-height: 100vh;
  background:
    radial-gradient(ellipse 70% 50% at 10% 0%, rgba(59,130,246,.22), transparent 55%),
    radial-gradient(ellipse 50% 40% at 90% 20%, rgba(139,92,246,.15), transparent 50%),
    var(--bg);
}

.landing-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(12px);
}

.landing-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.landing-nav-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.landing-hero {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 2rem;
  padding: 3rem 1.5rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
  align-items: center;
}

.landing-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 400;
  line-height: 1.12;
  margin: 1rem 0;
}

.landing-hero h1 em {
  font-style: italic;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.landing-hero-text > p {
  color: var(--text-muted);
  max-width: 36rem;
  margin-bottom: 1.25rem;
}

.landing-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
}

.landing-price-hint {
  font-size: 0.92rem;
  color: var(--text-dim);
}

.landing-price-hint strong {
  color: var(--success);
  font-size: 1.05rem;
}

.landing-hero-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.landing-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.landing-stat-grid div {
  background: var(--bg);
  border-radius: 12px;
  padding: 0.75rem;
  border: 1px solid var(--border);
}

.landing-stat-grid strong {
  display: block;
  font-size: 1.35rem;
}

.landing-stat-grid span {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.landing-checklist {
  list-style: none;
  color: #cbd5e1;
  font-size: 0.92rem;
  line-height: 1.7;
}

.landing-fine {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.75rem;
}

.landing-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.landing-section h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 1.25rem;
}

.landing-cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.landing-cards-3 article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.landing-cards-3 h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.landing-cards-3 p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.landing-modules-preview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.landing-mod {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.landing-mod span {
  font-size: 0.75rem;
  font-weight: 700;
  color: #93c5fd;
}

.landing-mod strong {
  font-size: 0.92rem;
}

.landing-mod small {
  color: var(--text-dim);
  font-size: 0.78rem;
}

.landing-mod.more {
  border-style: dashed;
}

.pricing-card {
  max-width: 440px;
  margin: 0 auto;
  background: var(--bg-elevated);
  border: 1px solid rgba(52, 211, 153, 0.35);
  border-radius: 24px;
  padding: 2rem;
  text-align: center;
}

.pricing-label {
  color: var(--success);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pricing-price {
  font-size: 2.75rem;
  font-weight: 700;
  margin: 0.35rem 0;
}

.pricing-note {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.pricing-card ul {
  text-align: left;
  list-style: none;
  margin: 0 0 1.25rem;
  color: #cbd5e1;
  font-size: 0.92rem;
  line-height: 1.8;
}

.landing-steps {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  max-width: 520px;
}

.landing-steps li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  color: #cbd5e1;
}

.landing-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  color: var(--text-dim);
  font-size: 0.88rem;
}

.paywall-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(251,191,36,.1), rgba(59,130,246,.12));
  border: 1px solid rgba(251, 191, 36, 0.35);
  border-radius: var(--radius);
  padding: 1.15rem 1.35rem;
  margin-bottom: 1.5rem;
}

.paywall-card .continue-label {
  color: var(--warning);
}

.paywall-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.unlock-page h2,
.cert-page .section-title {
  margin-bottom: 0.5rem;
}

.unlock-lead {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  max-width: 40rem;
}

.unlock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.unlock-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
}

.unlock-card h3 {
  margin-bottom: 0.85rem;
  font-size: 1.1rem;
}

.unlock-benefits {
  list-style: none;
  color: #cbd5e1;
  font-size: 0.9rem;
  line-height: 1.75;
  margin: 0.75rem 0 1rem;
}

/* Certificate */
.cert-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.cert-actions {
  margin-bottom: 1rem;
}

.cert-sheet {
  background: #f8fafc;
  color: #0f172a;
  border-radius: 8px;
  padding: 1rem;
  max-width: 900px;
  margin: 0 auto;
}

.cert-border {
  border: 3px double #1e3a5f;
  border-radius: 4px;
  padding: 2.5rem 2rem;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(59,130,246,.06), transparent 40%),
    #fff;
}

.cert-brand {
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #1d4ed8;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.cert-kicker {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #64748b;
}

.cert-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  margin: 0.75rem 0;
  color: #0f172a;
}

.cert-name {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-style: italic;
  color: #1e3a5f;
  margin: 0.5rem 0 1rem;
  border-bottom: 1px solid #cbd5e1;
  display: inline-block;
  padding: 0 1.5rem 0.35rem;
}

.cert-body {
  max-width: 34rem;
  margin: 0 auto 0.75rem;
  line-height: 1.55;
  color: #334155;
  font-size: 1rem;
}

.cert-sub {
  color: #64748b;
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.cert-footer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  text-align: center;
  font-size: 0.82rem;
  color: #64748b;
}

.cert-footer strong {
  display: block;
  color: #0f172a;
  margin-top: 0.25rem;
  font-size: 0.88rem;
}

.cert-line {
  height: 1px;
  background: #94a3b8;
  margin-bottom: 0.5rem;
}

.cert-id {
  font-family: ui-monospace, monospace;
  font-size: 0.75rem !important;
}

.cert-seal {
  margin-top: 1.75rem;
  font-family: var(--font-display);
  font-style: italic;
  color: #1d4ed8;
  font-size: 1.1rem;
}

/* Admin */
.admin-lead {
  color: var(--text-muted);
  margin-bottom: 1rem;
  max-width: 40rem;
}

.admin-stats {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.admin-generate {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  margin-bottom: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.admin-generate label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.admin-generate input {
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  min-width: 120px;
}

.admin-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.admin-table th,
.admin-table td {
  padding: 0.65rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.admin-table th {
  background: var(--bg-soft);
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.admin-table tr.is-used {
  opacity: 0.7;
}

.code-chip {
  background: var(--bg-soft);
  padding: 0.2rem 0.45rem;
  border-radius: 6px;
  color: #fde68a;
  font-size: 0.85rem;
}

.admin-help {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.admin-help h3 {
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.admin-help ol {
  margin: 0.5rem 0 0.75rem 1.15rem;
  line-height: 1.65;
}

@media print {
  body * {
    visibility: hidden !important;
  }
  .cert-sheet,
  .cert-sheet * {
    visibility: visible !important;
  }
  .cert-sheet {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    background: white !important;
    padding: 0 !important;
    box-shadow: none !important;
  }
  .no-print,
  .sidebar,
  .topbar,
  .app-shell > .sidebar-overlay {
    display: none !important;
  }
  .app-shell {
    display: block !important;
  }
  .main,
  .content {
    padding: 0 !important;
    max-width: none !important;
  }
}

/* ===== Mobile ===== */
.menu-toggle {
  display: none;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.1rem;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 30;
}

@media (max-width: 900px) {
  .login-page { grid-template-columns: 1fr; }
  .login-hero { display: none; }

  .landing-hero { grid-template-columns: 1fr; }
  .landing-cards-3 { grid-template-columns: 1fr; }
  .unlock-grid { grid-template-columns: 1fr; }
  .cert-footer { grid-template-columns: 1fr; gap: 1.25rem; }

  .app-shell { grid-template-columns: 1fr; }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 40;
    width: min(280px, 85vw);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }

  .sidebar.open { transform: translateX(0); }

  .sidebar-overlay.open { display: block; }

  .menu-toggle { display: grid; place-items: center; }

  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-toc { position: static; }

  .content { padding: 1.25rem 1rem 2.5rem; }
}

@media (max-width: 520px) {
  .lesson-row {
    grid-template-columns: auto 1fr;
  }
  .lesson-side { display: none; }
  .login-card { padding: 1.35rem; }
  .match-row { grid-template-columns: 1fr; }
  .fc-actions { flex-wrap: wrap; justify-content: center; }
  .continue-card { flex-direction: column; align-items: flex-start; }
}

/* ===== Phase D — Engajamento (streak, missão, busca, TTS) ===== */

.engage-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.streak-card,
.mission-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
}

.streak-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.streak-card.is-hot {
  border-color: rgba(251, 191, 36, 0.45);
  background: linear-gradient(135deg, rgba(251,191,36,.1), var(--bg-card));
}

.streak-fire {
  font-size: 2rem;
  line-height: 1;
}

.streak-card p,
.mission-list p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 0.2rem;
}

.mission-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.mission-ring {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-soft);
  border: 2px solid var(--primary);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}

.mission-card.is-done {
  border-color: rgba(52, 211, 153, 0.4);
  background: linear-gradient(135deg, rgba(52,211,153,.08), var(--bg-card));
}

.mission-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.mission-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.mission-list li.done strong {
  color: var(--success);
}

.mission-check {
  width: 1.4rem;
  text-align: center;
  font-weight: 700;
  color: var(--text-dim);
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.mission-list li.done .mission-check {
  color: var(--success);
}

.mission-celebrate {
  margin-top: 0.85rem;
  color: var(--success);
  font-weight: 600;
  font-size: 0.92rem;
}

.audio-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.audio-toolbar-label {
  font-weight: 600;
  font-size: 0.9rem;
  margin-right: 0.25rem;
}

.audio-hint {
  font-size: 0.8rem;
  color: var(--text-dim);
  width: 100%;
}

.btn-speak {
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 999px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, transform 0.15s, border-color 0.15s;
}

.btn-speak:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
}

.btn-speak.is-speaking {
  background: var(--primary);
  color: white;
  transform: scale(1.08);
}

.btn-speak.is-nudge {
  animation: nudge 0.4s ease;
}

@keyframes nudge {
  0%, 100% { transform: translateX(0); }
  30% { transform: translateX(-4px); }
  60% { transform: translateX(4px); }
}

.vocab-listen-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.vocab-listen-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.9rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.vocab-listen-main {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.vocab-listen-main span {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.btn-icon-search {
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 10px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  font-size: 1rem;
}

.btn-icon-search:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.search-page h2 {
  margin-bottom: 0.35rem;
}

.search-form {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.search-form input[type="search"] {
  flex: 1;
  min-width: 200px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 1rem;
}

.search-form input[type="search"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.search-count {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.search-results {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.search-results li {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
}

.search-result {
  flex: 1;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: border-color 0.15s, background 0.15s;
}

.search-result:hover {
  border-color: var(--primary);
  background: var(--bg-soft);
}

.search-type {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 600;
}

.search-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.toc-empty {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

@media (max-width: 900px) {
  .engage-row {
    grid-template-columns: 1fr;
  }
}

/* ===== Admin panel (users + codes) ===== */

.admin-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.25rem;
}

.admin-code-hint {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0.75rem 0 1rem;
  max-width: 48rem;
}

.admin-create-card,
.admin-grant-email {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  margin-bottom: 1rem;
}

.admin-create-card h3,
.admin-grant-email h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.admin-create-form {
  align-items: flex-end;
}

.admin-check {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-bottom: 0.4rem;
}

.admin-check input {
  width: auto !important;
}

.admin-user-name {
  display: block;
}

.admin-user-email {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.admin-status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.admin-status.st-full {
  color: #064e3b;
  background: rgba(52, 211, 153, 0.2);
  border-color: rgba(52, 211, 153, 0.4);
}

.admin-status.st-free {
  color: #1e3a8a;
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.35);
}

.admin-status.st-blocked {
  color: #7f1d1d;
  background: rgba(248, 113, 113, 0.15);
  border-color: rgba(248, 113, 113, 0.4);
}

.admin-status.st-admin {
  color: #5b21b6;
  background: rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.4);
}

.admin-prog {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.admin-actions-cell {
  min-width: 220px;
}

.admin-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.admin-danger {
  color: var(--danger) !important;
}

.admin-users-table td {
  vertical-align: middle;
}

.admin-table tr.is-revoked {
  opacity: 0.55;
}

.sync-toast.is-err {
  background: rgba(248, 113, 113, 0.15);
  border: 1px solid rgba(248, 113, 113, 0.4);
  color: #fecaca;
}

@media (max-width: 900px) {
  .admin-users-table {
    display: block;
    overflow-x: auto;
  }
}

/* Admin invite credentials card */
.admin-invite-card {
  background: linear-gradient(135deg, rgba(52,211,153,.12), rgba(59,130,246,.1));
  border: 1px solid rgba(52, 211, 153, 0.4);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  margin-bottom: 1.15rem;
}

.admin-invite-card h3 {
  margin-bottom: 0.35rem;
  font-size: 1.1rem;
}

.admin-cred-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0.85rem 0;
}

.admin-cred-grid > div {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.8rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.admin-cred-grid span {
  width: 100%;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.admin-cred-grid code {
  font-size: 0.95rem;
  word-break: break-all;
}

.admin-invite-label {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.admin-invite-label textarea {
  width: 100%;
  margin-top: 0.4rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.75rem;
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  resize: vertical;
}

#invite-token {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  resize: vertical;
}

@media (max-width: 700px) {
  .admin-cred-grid {
    grid-template-columns: 1fr;
  }
}

.admin-mode-pill {
  display: inline-block;
  margin-left: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(52, 211, 153, 0.15);
  border: 1px solid rgba(52, 211, 153, 0.4);
  color: var(--success);
  vertical-align: middle;
}
.admin-mode-local {
  background: rgba(148, 163, 184, 0.12);
  border-color: var(--border);
  color: var(--text-muted);
}
.admin-user-meta {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
  font-family: ui-monospace, monospace;
}