/* =============================================
   AdaptIQ — Adaptive Learning Platform
   Authors: Kafeero Mirembe Mercy & Kukiriza Samuel
   ============================================= */

:root {
  --navy: #0B0F1A;
  --navy-2: #131929;
  --navy-3: #1C2340;
  --violet: #7C3AED;
  --violet-light: #9D5CFF;
  --violet-dim: rgba(124, 58, 237, 0.15);
  --cyan: #06B6D4;
  --cyan-light: #22D3EE;
  --cyan-dim: rgba(6, 182, 212, 0.12);
  --white: #F8FAFC;
  --slate: #94A3B8;
  --slate-dim: #334155;
  --green: #10B981;
  --red: #EF4444;
  --amber: #F59E0B;
  --border: rgba(148, 163, 184, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--navy);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
}

.hidden { display: none !important; }

/* ---- LANDING PAGE ---- */
#landing-page { min-height: 100vh; }

.landing-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(11, 15, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-icon { display: flex; align-items: center; }

.nav-badge {
  background: var(--violet-dim);
  border: 1px solid var(--violet);
  color: var(--violet-light);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 100px;
  font-family: var(--font-mono);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 48px 80px;
}

#neural-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.35;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 760px;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(135deg, #7C3AED, #06B6D4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 18px;
  color: var(--slate);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  color: white;
  border: none;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(124, 58, 237, 0.4); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--border);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-ghost:hover { border-color: var(--slate); background: rgba(255,255,255,0.05); }

.btn-ghost-sm {
  background: transparent;
  color: var(--slate);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  width: 100%;
  margin-top: 8px;
}

.btn-ghost-sm:hover { color: var(--white); border-color: var(--slate); }

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
  border: 1px solid var(--red);
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-danger:hover { background: rgba(239, 68, 68, 0.3); }

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.stat { text-align: center; }
.stat-num { font-family: var(--font-display); font-size: 28px; font-weight: 700; display: block; }
.stat-label { font-size: 13px; color: var(--slate); font-family: var(--font-mono); }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

.features-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
}

.feature-card {
  background: var(--navy);
  padding: 40px 32px;
  transition: background 0.2s;
}

.feature-card:hover { background: var(--navy-2); }

.feature-icon {
  font-size: 28px;
  margin-bottom: 16px;
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon.cyan { background: var(--cyan-dim); }
.feature-icon.violet { background: var(--violet-dim); }

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p { font-size: 14px; color: var(--slate); line-height: 1.6; }

.landing-footer {
  text-align: center;
  padding: 32px;
  color: var(--slate);
  font-size: 14px;
  border-top: 1px solid var(--border);
}

/* ---- MODAL ---- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
}

.modal-card {
  position: relative;
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  z-index: 1;
}

.modal-card h2 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.modal-card > p { color: var(--slate); font-size: 15px; margin-bottom: 28px; }

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  color: var(--slate);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.2s;
}

.modal-close:hover { color: var(--white); }

/* ---- FORMS ---- */
.form-group { margin-bottom: 20px; }
.form-group.inline { display: flex; flex-direction: column; gap: 4px; }

label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 500;
  color: var(--slate);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.form-input {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}

.form-input:focus { border-color: var(--violet); background: rgba(124, 58, 237, 0.08); }
.form-input.compact { padding: 9px 14px; font-size: 14px; }

select.form-input option { background: var(--navy-2); color: var(--white); }

.key-input-wrap { position: relative; }
.key-input-wrap .form-input { padding-right: 48px; }

.toggle-eye {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.toggle-eye:hover { opacity: 1; }

.get-key-link {
  color: var(--cyan);
  font-size: 12px;
  text-decoration: none;
  font-weight: 500;
}

.get-key-link:hover { text-decoration: underline; }

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }

.full-width { width: 100%; margin-top: 16px; }

.info-box {
  background: var(--cyan-dim);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 14px;
  color: var(--cyan-light);
  margin-bottom: 20px;
  line-height: 1.5;
}

/* ---- TOPIC CHIPS ---- */
.topic-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}

.chip {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

.chip:hover { border-color: var(--violet); color: var(--violet-light); }
.chip.selected { background: var(--violet-dim); border-color: var(--violet); color: var(--violet-light); }

/* ---- LEVEL CARDS ---- */
.level-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.level-card {
  background: rgba(255,255,255,0.04);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.level-card:hover { border-color: var(--violet); background: var(--violet-dim); }
.level-card.selected { border-color: var(--cyan); background: var(--cyan-dim); }

.level-icon { font-size: 28px; margin-bottom: 10px; }
.level-card h3 { font-family: var(--font-display); font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.level-card p { font-size: 12px; color: var(--slate); line-height: 1.4; }

/* ---- MAIN APP ---- */
#main-app {
  display: flex;
  min-height: 100vh;
}

/* ---- SIDEBAR ---- */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--navy-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 50;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px 20px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.logo-icon.small { opacity: 0.9; }
.logo-text { letter-spacing: -0.5px; }

.user-profile-mini {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  margin-bottom: 16px;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.user-name-mini { font-size: 14px; font-weight: 600; }
.user-level-mini { font-size: 12px; color: var(--slate); font-family: var(--font-mono); text-transform: capitalize; }

.sidebar-nav { flex: 1; padding: 0 12px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 11px 12px;
  border-radius: var(--radius);
  border: none;
  background: none;
  color: var(--slate);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
  margin-bottom: 4px;
}

.nav-item:hover { background: rgba(255,255,255,0.05); color: var(--white); }
.nav-item.active { background: var(--violet-dim); color: var(--violet-light); }

.nav-icon { font-size: 16px; }

.sidebar-bottom {
  padding: 16px 20px 0;
  border-top: 1px solid var(--border);
}

.model-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--slate);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.model-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--slate-dim);
  flex-shrink: 0;
  transition: background 0.3s;
}

.model-dot.active { background: var(--green); box-shadow: 0 0 6px var(--green); }
.model-dot.error { background: var(--red); }

/* ---- MAIN CONTENT ---- */
.main-content {
  flex: 1;
  margin-left: 240px;
  padding: 40px;
  min-height: 100vh;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.tab-header { margin-bottom: 32px; }
.tab-header h1 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 6px;
}

.tab-subtitle { color: var(--slate); font-size: 15px; }
.topic-highlight { color: var(--cyan); }

/* ---- DASHBOARD ---- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.streak-card, .xp-card, .mastery-card, .sessions-card {
  display: flex;
  align-items: center;
  gap: 16px;
}

.streak-icon { font-size: 32px; }
.big-number { font-family: var(--font-display); font-size: 36px; font-weight: 700; line-height: 1; }
.card-label { font-size: 12px; color: var(--slate); margin-top: 4px; font-family: var(--font-mono); }
.card-title { font-family: var(--font-display); font-size: 17px; font-weight: 600; margin-bottom: 20px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Path visualization */
.path-container { padding: 12px 0; min-height: 120px; }
.path-loading { color: var(--slate); font-size: 14px; font-style: italic; }

.path-node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}

.path-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: all 0.3s;
}

.path-circle.done { border-color: var(--green); background: rgba(16, 185, 129, 0.15); }
.path-circle.current { border-color: var(--violet); background: var(--violet-dim); animation: pulse-violet 2s infinite; }
.path-circle.locked { opacity: 0.4; }

@keyframes pulse-violet {
  0%, 100% { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(124, 58, 237, 0); }
}

.path-line {
  width: 2px;
  height: 20px;
  background: var(--border);
  margin-left: 15px;
}

.path-node-info { flex: 1; }
.path-node-title { font-size: 14px; font-weight: 500; }
.path-node-sub { font-size: 12px; color: var(--slate); }

/* Recommendations */
.recommendations-list { display: flex; flex-direction: column; gap: 8px; }

.rec-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
}

.rec-item:hover { border-color: var(--violet); background: var(--violet-dim); }
.rec-icon { font-size: 22px; }
.rec-title { font-size: 14px; font-weight: 500; }
.rec-sub { font-size: 12px; color: var(--slate); }
.rec-arrow { color: var(--slate); margin-left: auto; }

/* ---- LEARN TAB ---- */
.learn-controls {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 24px;
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.learn-controls .form-group { margin-bottom: 0; flex: 1; min-width: 160px; }

.lesson-container {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  min-height: 400px;
}

.lesson-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 300px;
  gap: 16px;
  text-align: center;
}

.placeholder-icon { font-size: 48px; opacity: 0.4; }
.lesson-placeholder p { color: var(--slate); font-size: 15px; }

.lesson-content { line-height: 1.8; }

.lesson-content h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin: 28px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.lesson-content h2:first-child { margin-top: 0; }

.lesson-content h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--cyan-light);
  margin: 20px 0 10px;
}

.lesson-content p { color: #CBD5E1; margin-bottom: 14px; font-size: 15px; }

.lesson-content ul, .lesson-content ol {
  padding-left: 20px;
  margin-bottom: 14px;
  color: #CBD5E1;
}

.lesson-content li { margin-bottom: 6px; font-size: 15px; }

.lesson-content strong { color: var(--white); font-weight: 600; }

.lesson-content em { color: var(--violet-light); font-style: normal; font-weight: 500; }

.lesson-content code {
  font-family: var(--font-mono);
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 13px;
  color: var(--cyan-light);
}

.lesson-content pre {
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 16px;
}

.lesson-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
  color: #E2E8F0;
}

.lesson-content blockquote {
  border-left: 3px solid var(--violet);
  padding-left: 16px;
  color: var(--slate);
  font-style: italic;
  margin: 16px 0;
}

.lesson-actions {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.lesson-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.lesson-tag {
  background: var(--violet-dim);
  border: 1px solid var(--violet);
  color: var(--violet-light);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 100px;
  font-family: var(--font-mono);
}

.lesson-tag.cyan {
  background: var(--cyan-dim);
  border-color: var(--cyan);
  color: var(--cyan-light);
}

/* ---- QUIZ ---- */
.quiz-setup { margin-bottom: 24px; }

.quiz-options {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 16px;
  align-items: flex-end;
}

.quiz-options .form-group { margin-bottom: 0; }

#quiz-progress-bar-wrap { margin-bottom: 20px; }

.quiz-progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--slate);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.progress-bar-bg {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 100px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  border-radius: 100px;
  transition: width 0.5s ease;
  width: 0%;
}

.quiz-card {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.quiz-q {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 28px;
}

.quiz-options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 15px;
  text-align: left;
  background: none;
  color: var(--white);
  width: 100%;
}

.quiz-option:hover:not(:disabled) { border-color: var(--violet); background: var(--violet-dim); }

.quiz-option.correct { border-color: var(--green); background: rgba(16, 185, 129, 0.12); }
.quiz-option.incorrect { border-color: var(--red); background: rgba(239, 68, 68, 0.12); }
.quiz-option.selected-correct { border-color: var(--green); background: rgba(16, 185, 129, 0.2); }
.quiz-option.selected-incorrect { border-color: var(--red); background: rgba(239, 68, 68, 0.2); }

.option-letter {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.quiz-feedback {
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 16px;
}

.quiz-feedback.correct-fb { background: rgba(16, 185, 129, 0.12); border: 1px solid var(--green); color: #6EE7B7; }
.quiz-feedback.wrong-fb { background: rgba(239, 68, 68, 0.12); border: 1px solid var(--red); color: #FCA5A5; }

.results-card {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

.results-emoji { font-size: 64px; margin-bottom: 20px; }

.results-card h2 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.results-score {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.results-card p { color: var(--slate); font-size: 16px; margin-bottom: 28px; }

.results-breakdown {
  text-align: left;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  background: rgba(255,255,255,0.04);
}

.result-row .res-icon { font-size: 18px; flex-shrink: 0; }

.results-actions { display: flex; gap: 12px; justify-content: center; }

/* ---- TUTOR ---- */
.tutor-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  height: calc(100vh - 180px);
}

.tutor-sidebar-panel {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow-y: auto;
}

.tutor-sidebar-panel h3 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--slate);
  margin-bottom: 12px;
  margin-top: 20px;
}

.tutor-sidebar-panel h3:first-child { margin-top: 0; }

.model-selector { display: flex; flex-direction: column; gap: 8px; }

.model-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  background: none;
  color: var(--white);
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.model-btn:hover { border-color: var(--violet); background: var(--violet-dim); }
.model-btn.active { border-color: var(--violet); background: var(--violet-dim); }

.model-btn-icon { font-size: 20px; flex-shrink: 0; }
.model-btn-name { font-size: 13px; font-weight: 600; }
.model-btn-desc { font-size: 11px; color: var(--slate); }

.quick-prompts { display: flex; flex-direction: column; gap: 6px; }

.prompt-chip {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--slate);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.prompt-chip:hover { border-color: var(--cyan); color: var(--cyan-light); background: var(--cyan-dim); }

.chat-area {
  display: flex;
  flex-direction: column;
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chat-msg {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.chat-msg.user { flex-direction: row-reverse; }

.msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.ai-av {
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  font-family: var(--font-mono);
}

.user-av {
  background: linear-gradient(135deg, var(--cyan), var(--violet));
}

.msg-bubble {
  max-width: 75%;
  padding: 14px 18px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.6;
}

.chat-msg.assistant .msg-bubble {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-top-left-radius: 4px;
}

.chat-msg.user .msg-bubble {
  background: var(--violet-dim);
  border: 1px solid var(--violet);
  border-top-right-radius: 4px;
}

.msg-bubble p { margin-bottom: 8px; }
.msg-bubble p:last-child { margin-bottom: 0; }
.msg-bubble strong { color: var(--white); }
.msg-bubble code {
  font-family: var(--font-mono);
  background: rgba(0,0,0,0.3);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 12px;
  color: var(--cyan-light);
}

.typing-indicator {
  display: flex;
  gap: 5px;
  align-items: center;
  padding: 14px 18px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 16px;
  border-top-left-radius: 4px;
  width: fit-content;
}

.typing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--slate);
  animation: typing-bounce 1.2s infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

.chat-input-area {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  align-items: flex-end;
}

.chat-textarea {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 12px 16px;
  outline: none;
  resize: none;
  transition: border-color 0.2s;
}

.chat-textarea:focus { border-color: var(--violet); }

.send-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.send-btn:hover { transform: scale(1.05); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ---- PROGRESS ---- */
.progress-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.mastery-ring-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 160px;
}

.mastery-ring-label {
  position: absolute;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
}

.topic-mastery-list { display: flex; flex-direction: column; gap: 12px; }

.mastery-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mastery-topic-name { width: 160px; font-size: 14px; flex-shrink: 0; }
.mastery-bar-bg {
  flex: 1;
  height: 8px;
  background: rgba(255,255,255,0.08);
  border-radius: 100px;
  overflow: hidden;
}

.mastery-bar-fill {
  height: 100%;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  transition: width 0.8s ease;
}

.mastery-pct { width: 44px; text-align: right; font-size: 13px; color: var(--slate); font-family: var(--font-mono); }

.activity-log { display: flex; flex-direction: column; gap: 10px; }

.activity-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  font-size: 14px;
}

.activity-icon { font-size: 20px; flex-shrink: 0; }
.activity-text { flex: 1; }
.activity-time { font-size: 12px; color: var(--slate); font-family: var(--font-mono); }

.empty-state { color: var(--slate); font-size: 14px; font-style: italic; text-align: center; padding: 24px; }

/* ---- SETTINGS ---- */
.modal-actions { display: flex; gap: 12px; margin-top: 8px; }

/* ---- TOAST ---- */
.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--navy-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 20px;
  font-size: 14px;
  z-index: 9999;
  box-shadow: var(--shadow);
  max-width: 320px;
  transition: all 0.3s;
}

.toast.show { display: block; animation: slideIn 0.3s ease; }
.toast.success { border-color: var(--green); color: #6EE7B7; }
.toast.error { border-color: var(--red); color: #FCA5A5; }
.toast.info { border-color: var(--violet); color: var(--violet-light); }

@keyframes slideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

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

/* ---- RESPONSIVE ---- */
@media (max-width: 1100px) {
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .features-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .sidebar { width: 60px; }
  .sidebar-logo .logo-text, .user-profile-mini .user-name-mini,
  .user-profile-mini .user-level-mini, .nav-item span:last-child,
  .sidebar-bottom .model-status span, .sidebar-bottom .btn-ghost-sm { display: none; }
  .user-profile-mini { padding: 12px; justify-content: center; }
  .sidebar-nav { padding: 0 6px; }
  .nav-item { justify-content: center; padding: 12px; }
  .main-content { margin-left: 60px; padding: 24px; }
  .quiz-options { grid-template-columns: 1fr 1fr; }
  .tutor-layout { grid-template-columns: 1fr; height: auto; }
  .tutor-sidebar-panel { max-height: 300px; }
  .progress-grid { grid-template-columns: 1fr; }
  .learn-controls { flex-direction: column; }
}

@media (max-width: 640px) {
  .landing-nav { padding: 16px 20px; }
  .hero { padding: 80px 20px 60px; }
  .features-strip { grid-template-columns: 1fr; }
  .level-cards { grid-template-columns: 1fr; }
  .quiz-options { grid-template-columns: 1fr; }
  .hero-stats { gap: 16px; }
  .dashboard-grid { grid-template-columns: 1fr 1fr; }
  .main-content { padding: 16px; }
}