/* ════════════════════════════════════════
   FLUENTLY — style.css
   Design: Dark-first, Duolingo-inspired,
   vibrant accents, smooth animations
════════════════════════════════════════ */

/* ── VARIABLES ──────────────────────── */
:root {
  --bg:         #0d0f14;
  --bg2:        #151820;
  --bg3:        #1c2030;
  --surface:    #1e2235;
  --surface2:   #252a40;
  --border:     rgba(255,255,255,0.07);
  --accent:     #58cc02;
  --accent2:    #4caf00;
  --accent-glow:rgba(88,204,2,0.25);
  --blue:       #1cb0f6;
  --purple:     #a560f8;
  --red:        #ff4b4b;
  --yellow:     #ffd900;
  --orange:     #ff9600;
  --text:       #f0f0f0;
  --text2:      #9ba4bc;
  --text3:      #636b85;
  --radius:     16px;
  --radius-sm:  10px;
  --shadow:     0 8px 32px rgba(0,0,0,0.45);
  --font-head:  'Syne', sans-serif;
  --font-body:  'DM Sans', sans-serif;
  --transition: 0.25s ease;
  --sidebar-w:  240px;
}

[data-theme="light"] {
  --bg:         #f5f7fa;
  --bg2:        #eceef4;
  --bg3:        #e3e6ef;
  --surface:    #ffffff;
  --surface2:   #f0f2f8;
  --border:     rgba(0,0,0,0.08);
  --text:       #1a1d2b;
  --text2:      #5a6280;
  --text3:      #9ba0b8;
  --shadow:     0 4px 20px rgba(0,0,0,0.10);
}

/* ── RESET & BASE ────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

/* ── SCROLLBAR ───────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface2); border-radius: 99px; }

/* ── TYPOGRAPHY ─────────────────────── */
h1,h2,h3,h4 { font-family: var(--font-head); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); }
h3 { font-size: 1.1rem; }

/* ── SCREENS ─────────────────────────── */
.screen { min-height: 100vh; width: 100%; }
.screen.hidden { display: none !important; }
.screen.active { display: flex; }

/* ══════════════════════════════════════
   AUTH SCREEN
══════════════════════════════════════ */
#auth-screen {
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.auth-bg {
  position: absolute; inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.auth-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: orb-drift 12s ease-in-out infinite alternate;
}
.orb1 { width: 400px; height: 400px; background: var(--accent); top: -150px; left: -100px; }
.orb2 { width: 300px; height: 300px; background: var(--blue); bottom: -100px; right: -80px; animation-delay: -4s; }
.orb3 { width: 250px; height: 250px; background: var(--purple); top: 40%; left: 50%; transform: translate(-50%,-50%); animation-delay: -8s; }

@keyframes orb-drift {
  0%   { transform: translate(0,0) scale(1); }
  100% { transform: translate(30px,20px) scale(1.08); }
}

.auth-container {
  position: relative; z-index: 2;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow);
  animation: fade-up 0.5s ease both;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.auth-brand {
  text-align: center;
  margin-bottom: 28px;
}
.brand-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 8px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}
.brand-name {
  font-size: 2rem;
  font-family: var(--font-head);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.brand-tagline { color: var(--text2); font-size: 0.9rem; margin-top: 4px; }

/* Auth Tabs */
.auth-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg2);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--text2);
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
}
.auth-tab.active {
  background: var(--surface2);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

/* Forms */
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-form.hidden { display: none; }

.field-group { display: flex; flex-direction: column; gap: 6px; }
.field-group label { font-size: 0.82rem; color: var(--text2); font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; display:flex; align-items:center; gap:8px; }
.field-group input,
.field-group select,
.field-group textarea {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.field-group input:focus,
.field-group select:focus,
.field-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.field-group select { appearance: none; cursor: pointer; }

.field-row { display: flex; gap: 12px; }
.field-row .field-group { flex: 1; }

.auth-error {
  background: rgba(255,75,75,0.12);
  border: 1px solid rgba(255,75,75,0.35);
  border-radius: var(--radius-sm);
  color: var(--red);
  font-size: 0.85rem;
  padding: 10px 14px;
}
.auth-error.hidden { display: none; }

/* ── BUTTONS ─────────────────────────── */
.btn-primary {
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 24px;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
  box-shadow: 0 4px 16px var(--accent-glow);
  width: 100%;
}
.btn-primary:hover { background: var(--accent2); transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 10px 18px;
  transition: all var(--transition);
}
.btn-secondary:hover { background: var(--accent-glow); }

/* ══════════════════════════════════════
   APP LAYOUT
══════════════════════════════════════ */
#app-screen {
  display: none;
  flex-direction: row;
  min-height: 100vh;
}
#app-screen.active { display: flex; }

/* ── SIDEBAR ─────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  position: fixed; left: 0; top: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border);
}
.brand-icon-sm { font-size: 1.4rem; }
.brand-text {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.2rem;
  background: linear-gradient(135deg, var(--accent), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.user-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}
.user-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}
.user-name { font-weight: 600; font-size: 0.9rem; }
.user-xp { font-size: 0.78rem; color: var(--accent); font-weight: 600; }

.nav-links { list-style: none; padding: 0 10px; flex: 1; }
.nav-links li { margin-bottom: 2px; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  color: var(--text2);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
  transition: all var(--transition);
}
.nav-link:hover { background: var(--surface2); color: var(--text); }
.nav-link.active { background: var(--accent-glow); color: var(--accent); font-weight: 700; }

.sidebar-footer {
  padding: 16px 10px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.btn-theme-toggle, .btn-logout {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 9px 14px;
  text-align: left;
  transition: all var(--transition);
}
.btn-theme-toggle:hover { background: var(--surface2); color: var(--text); }
.btn-logout:hover { background: rgba(255,75,75,0.12); color: var(--red); border-color: rgba(255,75,75,0.3); }

/* HAMBURGER */
.hamburger {
  display: none;
  position: fixed;
  top: 14px; left: 14px;
  z-index: 200;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 8px 12px;
  box-shadow: var(--shadow);
}

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
  backdrop-filter: blur(2px);
}

/* ── MAIN CONTENT ────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 36px 32px;
  min-height: 100vh;
}

/* ── VIEWS ───────────────────────────── */
.view { display: none; animation: fade-up 0.3s ease both; }
.view.active { display: block; }

.view-header { margin-bottom: 28px; }
.view-header h2 { margin-bottom: 4px; }
.subtitle { color: var(--text2); font-size: 0.95rem; }

.section-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text2);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin: 28px 0 14px;
}

/* ── STATS ROW ───────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 6px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.stat-icon { font-size: 1.6rem; margin-bottom: 8px; }
.stat-value { font-family: var(--font-head); font-size: 1.6rem; font-weight: 800; }
.stat-label { font-size: 0.78rem; color: var(--text2); margin-top: 4px; }

/* ── ACTIVE COURSES ──────────────────── */
.active-courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.active-course-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all var(--transition);
}
.active-course-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--accent); }
.active-course-card .course-emoji { font-size: 2rem; margin-bottom: 10px; }
.active-course-card h4 { font-family: var(--font-head); margin-bottom: 6px; }
.mini-progress { height: 6px; background: var(--bg3); border-radius: 99px; margin-top: 10px; overflow: hidden; }
.mini-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--blue)); border-radius: 99px; transition: width 0.6s ease; }
.mini-level { font-size: 0.78rem; color: var(--accent); font-weight: 700; margin-top: 6px; }

.daily-goal-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 24px;
  transition: all var(--transition);
}
.daily-goal-head { display: flex; justify-content: space-between; align-items: center; font-weight: 700; margin-bottom: 10px; }
.daily-goal-head span:first-child { color: var(--text); }
.daily-goal-head span:last-child { font-size: 0.85rem; color: var(--text-muted); }
.daily-goal-track { height: 10px; background: var(--bg3); border-radius: 99px; overflow: hidden; }
.daily-goal-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--yellow)); border-radius: 99px; transition: width 0.6s ease; }
.daily-goal-card.goal-complete { border-color: var(--accent); }
.daily-goal-card.goal-complete .daily-goal-fill { background: linear-gradient(90deg, var(--accent), var(--accent2)); }

.phrase-of-day-card {
  background: linear-gradient(135deg, var(--accent-glow), transparent);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 24px;
}
.pod-head { font-weight: 700; font-size: 0.85rem; color: var(--text2); margin-bottom: 8px; }
.pod-head span { font-weight: 400; color: var(--text-muted); }
.pod-phrase { font-size: 1.15rem; font-weight: 700; font-family: var(--font-head); color: var(--accent); margin-bottom: 4px; }
.pod-translation { font-size: 0.9rem; color: var(--text2); }

/* ── QUICK ACTIONS ───────────────────── */
.quick-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.quick-btn {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 13px 20px;
  transition: all var(--transition);
}
.quick-btn:hover { background: var(--surface2); border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ── COURSES GRID ────────────────────── */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.course-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.course-card > div:first-child { cursor: pointer; }
.course-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--accent-glow), transparent);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.course-card:hover::before { opacity: 1; }
.course-card.enrolled { border-color: var(--accent); }
.course-card.enrolled::after {
  content: '✓';
  position: absolute; top: 10px; right: 12px;
  font-size: 0.8rem;
  background: var(--accent);
  color: #fff;
  width: 22px; height: 22px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.course-emoji { font-size: 2.8rem; margin-bottom: 12px; display: block; }
.course-name { font-family: var(--font-head); font-weight: 700; margin-bottom: 4px; }
.course-native { font-size: 0.8rem; color: var(--text2); }
.btn-cancel-course {
  margin-top: 14px;
  width: 100%;
  background: transparent;
  border: 1.5px solid var(--red);
  color: var(--red);
  border-radius: 10px;
  padding: 7px 10px;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  z-index: 1;
}
.btn-cancel-course:hover { background: var(--red); color: #fff; }

/* ── CHAT ────────────────────────────── */
.chat-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.chat-lang-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text2);
}
.chat-lang-selector select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 8px 12px;
  outline: none;
}

.chat-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  height: 460px;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 12px;
}

.chat-welcome {
  margin: auto;
  text-align: center;
  color: var(--text2);
  max-width: 320px;
}
.chat-welcome-icon { font-size: 3rem; margin-bottom: 12px; }

.msg {
  display: flex;
  flex-direction: column;
  gap: 4px;
  animation: msg-in 0.2s ease both;
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.msg.user { align-items: flex-end; }
.msg.ai   { align-items: flex-start; }

.msg-bubble {
  max-width: 72%;
  padding: 12px 16px;
  border-radius: 18px;
  line-height: 1.55;
  font-size: 0.92rem;
}
.msg.user .msg-bubble {
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.msg.ai .msg-bubble {
  background: var(--surface2);
  border-bottom-left-radius: 4px;
  white-space: pre-wrap;
}
.msg-label { font-size: 0.72rem; color: var(--text3); padding: 0 4px; }

.chat-input-bar {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
}
.chat-input-bar textarea {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  resize: none;
  max-height: 120px;
  line-height: 1.5;
}

.btn-send {
  background: var(--accent);
  border: none;
  border-radius: 10px;
  color: #fff;
  cursor: pointer;
  font-size: 1rem;
  padding: 10px 14px;
  transition: all var(--transition);
}
.btn-send:hover { background: var(--accent2); transform: scale(1.05); }
.btn-send:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-mic {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text2);
  cursor: pointer;
  font-size: 1rem;
  padding: 10px 12px;
  transition: all var(--transition);
}
.btn-mic:hover { background: var(--surface2); color: var(--blue); }

/* Typing indicator */
.typing-dots {
  display: flex; gap: 4px; padding: 12px 16px;
  background: var(--surface2);
  border-radius: 18px 18px 18px 4px;
}
.typing-dots span {
  width: 7px; height: 7px;
  background: var(--text3);
  border-radius: 50%;
  animation: dot-bounce 1.2s infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dot-bounce {
  0%,80%,100% { transform: translateY(0); opacity: 0.4; }
  40%          { transform: translateY(-6px); opacity: 1; }
}

/* ── EXERCISES ───────────────────────── */
.exercise-controls {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.exercise-controls .field-group { min-width: 160px; }
.exercise-controls .btn-primary { width: auto; padding: 13px 24px; }

.exercise-area {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  min-height: 200px;
}

.exercise-card h3 {
  margin-bottom: 6px;
  color: var(--accent);
  font-family: var(--font-head);
}
.ex-level-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  background: var(--accent-glow);
  color: var(--accent);
  padding: 2px 9px;
  border-radius: 99px;
  margin-left: 8px;
  vertical-align: middle;
}
.exercise-card .exercise-question {
  font-size: 1.1rem;
  margin: 14px 0;
  line-height: 1.6;
}
.ex-linked-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  background: var(--accent-glow);
  color: var(--accent2);
  padding: 6px 12px;
  border-radius: 99px;
  margin: 8px 0 14px;
  width: fit-content;
}
.exercise-card textarea {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  padding: 12px 14px;
  resize: vertical;
  width: 100%;
  margin-bottom: 14px;
  min-height: 80px;
  transition: border-color var(--transition);
}
.exercise-card textarea:focus { border-color: var(--accent); }
.exercise-card .btn-primary { width: auto; }
.exercise-feedback {
  margin-top: 16px;
  background: var(--bg2);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  font-size: 0.9rem;
}
.xp-earned {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: 99px;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 5px 12px;
  margin-top: 10px;
  animation: pop 0.3s ease;
}
@keyframes pop {
  0%   { transform: scale(0.8); opacity: 0; }
  60%  { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

/* ── SIMULATIONS ─────────────────────── */
.sim-lang-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  color: var(--text2);
}
.sim-lang-row select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 8px 14px;
  outline: none;
}

.simulations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.sim-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
}
.sim-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow); }
.sim-icon { font-size: 2.4rem; margin-bottom: 12px; }
.sim-card h3 { margin-bottom: 6px; }
.sim-card p { font-size: 0.83rem; color: var(--text2); margin-bottom: 16px; line-height: 1.5; }

.sim-chat-area { margin-top: 10px; }
.sim-chat-area.hidden { display: none; }
.sim-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 14px 20px;
  font-family: var(--font-head);
  font-weight: 700;
}
.sim-chat-header + .chat-window { border-radius: 0; border-top: none; }
.btn-close-sim {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.82rem;
  padding: 6px 12px;
  transition: all var(--transition);
}
.btn-close-sim:hover { background: rgba(255,75,75,0.1); color: var(--red); border-color: rgba(255,75,75,0.3); }

.progress-overview {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.level-badge-big {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
  flex-shrink: 0;
}

.progress-details { flex: 1; min-width: 200px; }
.xp-row { display: flex; gap: 24px; margin-bottom: 14px; font-size: 0.95rem; }
.xp-row strong { color: var(--accent); }
.progress-bar-wrap { height: 10px; background: var(--bg3); border-radius: 99px; overflow: hidden; margin-bottom: 6px; }
.progress-bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--blue)); border-radius: 99px; transition: width 0.8s ease; }
.progress-bar-label { font-size: 0.78rem; color: var(--text3); }

.course-progress-list { display: flex; flex-direction: column; gap: 12px; }
.course-prog-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.course-prog-emoji { font-size: 1.8rem; }
.course-prog-info { flex: 1; }
.course-prog-name { font-weight: 600; margin-bottom: 6px; }
.course-prog-bar { height: 6px; background: var(--bg3); border-radius: 99px; overflow: hidden; }
.course-prog-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--blue)); border-radius: 99px; }
.course-prog-level { font-size: 0.8rem; color: var(--accent); font-weight: 700; margin-left: auto; }

.error-patterns {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.error-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,150,0,0.12);
  border: 1px solid rgba(255,150,0,0.3);
  border-radius: 99px;
  color: var(--orange);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 5px 12px;
  margin: 3px;
}
.muted { color: var(--text3); font-size: 0.9rem; }

.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.modal-overlay.hidden { display: none; }
.modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow);
  animation: fade-up 0.3s ease;
}
.modal-box h3 { margin-bottom: 10px; font-family: var(--font-head); }
.modal-box p { color: var(--text2); font-size: 0.9rem; margin-bottom: 20px; line-height: 1.6; }
.modal-actions { margin-top: 16px; }

.toast {
  position: fixed;
  bottom: 24px; right: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  max-width: 320px;
  padding: 14px 18px;
  z-index: 9999;
  animation: toast-in 0.3s ease;
}
.toast.hidden { display: none; }
.toast.success { border-left: 3px solid var(--accent); }
.toast.error   { border-left: 3px solid var(--red); }
.toast.info    { border-left: 3px solid var(--blue); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--text2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.empty-state p { font-size: 0.95rem; }

/* ── LOADING SPINNER ─────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.learn-controls {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.learn-controls .field-group { min-width: 160px; }
.learn-controls .btn-primary { width: auto; padding: 13px 24px; }

.auto-level-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text2);
  margin-bottom: 24px;
  cursor: pointer;
  max-width: 640px;
  line-height: 1.5;
}
.auto-level-toggle input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; flex-shrink: 0; }

.auto-badge {
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 6px;
  letter-spacing: 0.5px;
}
.auto-badge.hidden { display: none; }

.learn-topics-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}
.topic-chip {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 99px;
  color: var(--text2);
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 8px 16px;
  transition: all var(--transition);
}
.topic-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.lesson-area {
  min-height: 200px;
}

.lesson-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  animation: fade-up 0.35s ease both;
}

.lesson-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 28px;
  background: linear-gradient(135deg, var(--accent-glow), rgba(28,176,246,0.12));
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.lesson-header h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  flex: 1;
}
.lesson-badge {
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.85rem;
  padding: 4px 12px;
  flex-shrink: 0;
}
.lesson-xp {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: 99px;
  padding: 4px 12px;
  animation: pop 0.3s ease;
}

.lesson-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.lesson-section {
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  background: var(--bg2);
  border: 1px solid var(--border);
}
.lesson-section-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 10px;
  color: var(--text);
}
.lesson-section-body {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text2);
  white-space: pre-wrap;
}

.lesson-intro { border-left: 3px solid var(--blue); }
.lesson-intro .lesson-section-title { color: var(--blue); }

.lesson-vocab { border-left: 3px solid var(--accent); }
.lesson-vocab .lesson-section-title { color: var(--accent); }

.lesson-examples { border-left: 3px solid var(--purple); }
.lesson-examples .lesson-section-title { color: var(--purple); }

.lesson-warning { border-left: 3px solid var(--red); background: rgba(255,75,75,0.06); }
.lesson-warning .lesson-section-title { color: var(--red); }

.lesson-tip { border-left: 3px solid var(--yellow); background: rgba(255,217,0,0.06); }
.lesson-tip .lesson-section-title { color: var(--yellow); }

.lesson-quiz { border-left: 3px solid var(--orange); background: rgba(255,150,0,0.06); }
.lesson-quiz .lesson-section-title { color: var(--orange); }

.lesson-actions {
  display: flex;
  gap: 12px;
  padding: 20px 28px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.games-lang-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.games-lang-row label { font-weight: 600; color: var(--text2); font-size: 0.9rem; }
.games-lang-row select {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 8px 14px;
  outline: none;
  cursor: pointer;
}

.minigames-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.minigame-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.minigame-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(88,204,2,0.15);
  border-color: var(--accent);
}
.mg-icon { font-size: 2.5rem; margin-bottom: 10px; }
.minigame-card h3 { font-family: var(--font-head); font-size: 1rem; margin-bottom: 6px; }
.minigame-card p { font-size: 0.82rem; color: var(--text2); margin-bottom: 8px; line-height: 1.5; }
.mg-xp { font-size: 0.78rem; font-weight: 700; color: var(--accent); background: var(--accent-glow); border-radius: 99px; padding: 3px 10px; display: inline-block; }

.minigame-active { animation: fade-up 0.3s ease; }
.minigame-active-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.mg-active-title { font-family: var(--font-head); font-weight: 700; font-size: 1.1rem; }
.minigame-play-area { min-height: 300px; }

.game-progress-bar {
  height: 6px;
  background: var(--bg3);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 16px;
}
.game-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--blue));
  border-radius: 99px;
  transition: width 0.4s ease;
}
.game-score-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text2);
  font-weight: 600;
  margin-bottom: 20px;
}
.flashcard-container {
  perspective: 1000px;
  height: 200px;
  cursor: pointer;
  margin-bottom: 20px;
}
.flashcard {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 24px;
  text-align: center;
}
.flashcard-front {
  background: linear-gradient(135deg, var(--surface), var(--surface2));
  border: 1px solid var(--border);
}
.flashcard-back {
  background: linear-gradient(135deg, var(--accent-glow), rgba(28,176,246,0.12));
  border: 1px solid var(--accent);
  transform: rotateY(180deg);
}
.fc-label { font-size: 0.75rem; color: var(--text3); text-transform: uppercase; letter-spacing: 1px; }
.fc-word { font-size: 2rem; font-family: var(--font-head); font-weight: 800; }
.fc-hint { font-size: 0.8rem; color: var(--text3); }
.fc-translation { font-size: 1.8rem; font-family: var(--font-head); font-weight: 800; color: var(--accent); }
.fc-example { font-size: 0.85rem; color: var(--text2); line-height: 1.5; }

.fc-actions {
  display: flex;
  gap: 14px;
}
.fc-actions.hidden { display: none; }
.btn-wrong, .btn-correct {
  flex: 1;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 12px;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-wrong { background: rgba(255,75,75,0.15); color: var(--red); border: 1.5px solid var(--red); }
.btn-wrong:hover { background: rgba(255,75,75,0.25); }
.btn-correct { background: var(--accent-glow); color: var(--accent); border: 1.5px solid var(--accent); }
.btn-correct:hover { background: rgba(88,204,2,0.3); }
.quiz-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  animation: fade-up 0.3s ease;
}
.quiz-question {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 20px;
  line-height: 1.6;
}
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-option {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 12px 16px;
  text-align: left;
  transition: all var(--transition);
}
.quiz-option:hover:not(:disabled) { border-color: var(--blue); background: rgba(28,176,246,0.08); }
.quiz-option.correct { border-color: var(--accent); background: var(--accent-glow); color: var(--accent); }
.quiz-option.wrong { border-color: var(--red); background: rgba(255,75,75,0.1); color: var(--red); }
.quiz-option:disabled { cursor: not-allowed; }
.opt-letter {
  background: var(--surface2);
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.8rem;
  min-width: 24px;
  padding: 2px 6px;
  text-align: center;
}
.quiz-explanation {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(28,176,246,0.08);
  border: 1px solid rgba(28,176,246,0.25);
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.5;
}
.quiz-explanation.hidden { display: none; }
.fillblank-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  animation: fade-up 0.3s ease;
}
.fb-sentence {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.7;
  color: var(--text);
}
.fb-hint { font-size: 0.85rem; color: var(--text2); }
.fb-input {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
  outline: none;
  transition: border-color var(--transition);
}
.fb-input:focus { border-color: var(--accent); }
.fb-result { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 0.9rem; }
.fb-result.hidden { display: none; }
.fb-correct { color: var(--accent); }
.fb-wrong { color: var(--red); }
.memory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.mem-card {
  aspect-ratio: 1;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.35s ease;
  min-height: 70px;
}
.mem-card.reveal, .mem-card.matched { transform: rotateY(180deg); }
.mem-card.matched { border-color: var(--accent); opacity: 0.7; }
.mem-front, .mem-back {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  backface-visibility: hidden;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px;
  text-align: center;
}
.mem-front { font-size: 1.4rem; background: var(--surface2); }
.mem-back { background: linear-gradient(135deg, var(--accent-glow), rgba(28,176,246,0.1)); transform: rotateY(180deg); color: var(--text); }
.mem-result {
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-weight: 700;
  padding: 14px 20px;
  text-align: center;
}
.mem-result.hidden { display: none; }
.game-result {
  text-align: center;
  padding: 48px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  animation: fade-up 0.3s ease;
}
.result-emoji { font-size: 4rem; margin-bottom: 16px; }
.game-result h3 { font-family: var(--font-head); font-size: 1.4rem; margin-bottom: 12px; }
.result-xp { font-size: 1rem; font-weight: 700; color: var(--accent); background: var(--accent-glow); display: inline-block; border-radius: 99px; padding: 6px 18px; border: 1px solid var(--accent); }

/* XP Earned badge */
.xp-earned {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.9rem;
  margin-top: 8px;
}

/* ── UNSCRAMBLE GAME ─────────────────── */
.unscramble-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  animation: fade-up 0.3s ease;
}
.unscramble-translation { color: var(--text2); font-size: 0.9rem; margin-bottom: 18px; }
.unscramble-answer-slot {
  min-height: 56px;
  background: var(--bg2);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  margin-bottom: 18px;
  align-items: center;
}
.unscramble-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.word-chip {
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 14px;
  transition: all var(--transition);
}
.word-chip:hover { border-color: var(--accent); color: var(--accent); }
.word-chip.placed { opacity: 0.35; cursor: not-allowed; }
.word-chip.in-answer { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }

/* ── TRUE/FALSE GAME ─────────────────── */
.tf-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  animation: fade-up 0.3s ease;
  text-align: center;
}
.tf-statement { font-size: 1.15rem; font-weight: 600; line-height: 1.6; margin-bottom: 24px; }
.tf-actions { display: flex; gap: 14px; }
.btn-tf-true, .btn-tf-false {
  flex: 1;
  border-radius: var(--radius-sm);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  padding: 16px;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-tf-true { background: var(--accent-glow); color: var(--accent); border: 1.5px solid var(--accent); }
.btn-tf-true:hover { background: rgba(88,204,2,0.3); }
.btn-tf-false { background: rgba(255,75,75,0.12); color: var(--red); border: 1.5px solid var(--red); }
.btn-tf-false:hover { background: rgba(255,75,75,0.22); }

/* ── ODD ONE OUT GAME ────────────────── */
.oddone-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  animation: fade-up 0.3s ease;
}
.oddone-instruction { font-size: 0.9rem; color: var(--text2); margin-bottom: 18px; }
.oddone-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.oddone-option {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  font-size: 1rem;
  padding: 18px;
  text-align: center;
  transition: all var(--transition);
}
.oddone-option:hover:not(:disabled) { border-color: var(--blue); }
.oddone-option.correct { border-color: var(--accent); background: var(--accent-glow); color: var(--accent); }
.oddone-option.wrong { border-color: var(--red); background: rgba(255,75,75,0.1); color: var(--red); }

/* ── EXAM ─────────────────────────────── */
.exam-controls {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.exam-controls .field-group { min-width: 160px; }
.exam-area { min-height: 200px; }
.exam-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
  animation: fade-up 0.3s ease both;
}
.exam-q-number {
  font-size: 0.78rem;
  color: var(--text3);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.exam-question { font-size: 1.05rem; font-weight: 600; margin-bottom: 16px; line-height: 1.6; }
.exam-options { display: flex; flex-direction: column; gap: 10px; }
.exam-option {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  padding: 12px 16px;
  text-align: left;
  transition: all var(--transition);
}
.exam-option:hover { border-color: var(--blue); }
.exam-option.selected { border-color: var(--accent); background: var(--accent-glow); }
.exam-progress-label { font-size: 0.85rem; color: var(--text2); margin-bottom: 14px; font-weight: 600; }
.exam-submit-bar { display: flex; justify-content: flex-end; margin-top: 20px; }
.exam-submit-bar .btn-primary { width: auto; padding: 14px 32px; }
.exam-result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
  animation: fade-up 0.3s ease;
}
.exam-score-circle {
  width: 110px; height: 110px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--blue));
  display: flex; align-items: center; justify-content: center;
  flex-direction: column;
  margin: 0 auto 20px;
  color: #fff;
  font-family: var(--font-head);
  box-shadow: 0 6px 24px var(--accent-glow);
}
.exam-score-circle .big { font-size: 1.8rem; font-weight: 800; }
.exam-score-circle .small { font-size: 0.7rem; opacity: 0.85; }
.exam-review-item {
  text-align: left;
  background: var(--bg2);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border);
  padding: 14px 18px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  line-height: 1.5;
}
.exam-review-item.ok { border-left-color: var(--accent); }
.exam-review-item.bad { border-left-color: var(--red); }

/* ── SETTINGS / PALETTE ──────────────── */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 32px;
}
.palette-swatch {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.palette-swatch:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.palette-swatch.active { border-color: var(--accent); }
.palette-swatch.active::after {
  content: '✓';
  position: absolute; top: 8px; right: 8px;
  background: var(--accent);
  color: #fff;
  width: 20px; height: 20px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 800;
}
.palette-dots { display: flex; gap: 6px; margin-bottom: 10px; }
.palette-dot { width: 22px; height: 22px; border-radius: 50%; }
.palette-name { font-weight: 700; font-size: 0.88rem; }

.settings-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 480px;
}

.ai-review-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.ai-review-result {
  margin-top: 18px;
}
.ai-review-result:empty { margin-top: 0; }
.ai-review-card {
  background: var(--bg2);
  border-left: 3px solid var(--purple);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 20px;
  line-height: 1.7;
  font-size: 0.92rem;
  white-space: pre-wrap;
  animation: fade-up 0.3s ease;
}

@media (max-width: 900px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --sidebar-w: 240px; }

  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 40px rgba(0,0,0,0.4);
  }
  .sidebar-overlay.open { display: block; }

  .hamburger { display: flex; align-items: center; }

  .main-content {
    margin-left: 0;
    padding: 20px 16px;
    padding-top: 60px;
  }

  .auth-container { padding: 28px 20px; }
  .field-row { flex-direction: column; }

  .chat-window { height: 360px; }
  .msg-bubble { max-width: 88%; }

  .chat-header-row { flex-direction: column; gap: 10px; }

  .exercise-controls { flex-direction: column; }
  .exercise-controls .btn-primary { width: 100%; }

  .learn-controls { flex-direction: column; }
  .learn-controls .btn-primary { width: 100%; }
  .lesson-body { padding: 18px; }
  .lesson-actions { flex-direction: column; }

  .exam-controls { flex-direction: column; }
  .exam-controls .btn-primary { width: 100%; }

  .progress-overview { flex-direction: column; align-items: flex-start; }

  .quick-actions { flex-direction: column; }
  .quick-btn { width: 100%; text-align: left; }

  .oddone-options { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-card { padding: 14px 12px; }
  .stat-value { font-size: 1.3rem; }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .simulations-grid { grid-template-columns: 1fr 1fr; }
}