html, body { overflow: hidden; height: 100vh; }

.demo-container {
  position: relative;
  z-index: 1;
  height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 1800px;
  margin: 0 auto;
}

/* Progress bar */
.demo-progress-top {
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}
.dp-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--warning));
  width: 0;
  transition: width 0.3s ease;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.6);
}

/* Controls */
.demo-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: rgba(10, 10, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--panel-border);
  flex-shrink: 0;
  gap: 1rem;
}
.dc-left, .dc-right { display: flex; align-items: center; gap: 0.5rem; }
.dc-center {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  justify-content: center;
}
.dc-btn {
  width: 40px; height: 40px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.95rem;
  font-family: inherit;
  transition: all 0.2s;
}
.dc-btn:hover { background: rgba(99, 102, 241, 0.2); }
.dc-btn.main {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none;
  font-size: 1rem;
}
.dc-btn.main:hover { transform: scale(1.05); }
.dc-counter {
  font-family: 'Inter', monospace;
  font-weight: 700;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.dc-title {
  font-weight: 800;
  font-size: 1.05rem;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.dc-link {
  padding: 0.4rem 0.9rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
}
.dc-link:hover { background: rgba(255, 255, 255, 0.1); }

/* Main viewport */
.demo-viewport-wrap {
  position: relative;
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 400px;
  overflow: hidden;
}

.mock-viewport {
  width: 100%;
  height: 100%;
  background: var(--bg);
  overflow: hidden;
  position: relative;
  transition: opacity 0.4s;
  padding: 2rem 3rem;
}
.mock-viewport.switching { opacity: 0.3; }

.use-real-btn {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 0.7rem 1.3rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 800;
  font-size: 0.88rem;
  z-index: 10;
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
  transition: all 0.2s;
}
.use-real-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(236, 72, 153, 0.5); }

.mock-app {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.mock-toolbar {
  display: flex;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(10, 10, 26, 0.8);
  border-bottom: 1px solid var(--panel-border);
}
.mock-logo {
  font-weight: 800;
  font-size: 1rem;
  background: linear-gradient(135deg, #818cf8, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.mock-badge-live {
  padding: 0.25rem 0.7rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Tutor mockup */
.mock-chat {
  flex: 1;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  overflow: hidden;
}
.mock-msg { display: flex; gap: 0.75rem; align-items: flex-start; }
.mock-msg.user-msg { flex-direction: row-reverse; }
.mock-avatar {
  width: 44px; height: 44px;
  background: rgba(99, 102, 241, 0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.user-msg .mock-avatar { background: rgba(236, 72, 153, 0.15); }
.mock-bubble {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  padding: 1rem 1.25rem;
  border-radius: 14px;
  max-width: 500px;
  line-height: 1.9;
  font-size: 0.9rem;
}
.user-msg .mock-bubble {
  background: rgba(236, 72, 153, 0.08);
  border-color: rgba(236, 72, 153, 0.2);
}
.mock-typing h4 { color: var(--primary-light); margin: 0.5rem 0 0.3rem; font-size: 0.92rem; }
.mock-typing p { margin: 0.3rem 0; }
.mock-typing strong { color: var(--accent); }

/* Moshi mockup */
.mock-moshi-flow, .mock-tb-output, .mock-problems-output {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}
.mock-upload {
  width: 100%;
  max-width: 400px;
  padding: 1.5rem;
  background: rgba(236, 72, 153, 0.08);
  border: 2px dashed rgba(236, 72, 153, 0.3);
  border-radius: 12px;
  text-align: center;
}
.mock-upload-icon { font-size: 3rem; margin-bottom: 0.5rem; }
.mock-arrow-down, .mock-arrow-right {
  font-size: 2rem;
  color: var(--primary-light);
  font-weight: 900;
}
.mock-analyzing {
  padding: 1rem 1.5rem;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 10px;
  color: var(--primary-light);
  font-weight: 700;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.mock-spinner {
  width: 20px; height: 20px;
  border: 3px solid rgba(99, 102, 241, 0.3);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.mock-result {
  width: 100%;
  max-width: 500px;
  padding: 1.5rem;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 12px;
}
.mock-result-title { color: var(--success); font-weight: 800; font-size: 1rem; margin-bottom: 0.75rem; }
.mock-result-grid { display: grid; grid-template-columns: 1fr; gap: 0.4rem; font-size: 0.95rem; }
.mock-result-grid strong { color: var(--primary-light); }
.mock-weak {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: rgba(239, 68, 68, 0.1);
  border-radius: 6px;
  color: var(--error);
  font-weight: 700;
  font-size: 0.9rem;
}

/* Problems mockup */
.mock-form {
  padding: 1.5rem;
  background: rgba(99, 102, 241, 0.05);
  border-radius: 12px;
  margin: 1rem 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.mock-field { font-size: 0.95rem; color: var(--text); }
.mock-field strong { color: var(--primary-light); }
.mock-gen-btn {
  padding: 0.7rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-radius: 8px;
  font-weight: 800;
  text-align: center;
  margin-top: 0.5rem;
}
.mock-problem {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  font-size: 0.88rem;
  line-height: 1.9;
  max-width: 600px;
  width: 100%;
}
.mock-more {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* Curriculum mockup */
.mock-input-card {
  margin: 1.5rem 2rem 0;
  padding: 1.25rem 1.5rem;
  background: rgba(99, 102, 241, 0.08);
  border-radius: 12px;
  line-height: 2;
}
.mock-input-card strong { color: var(--accent); }
.mock-timeline {
  padding: 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.mock-phase {
  padding: 0.9rem 1.1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border);
  border-left: 3px solid var(--primary);
  border-radius: 0 10px 10px 0;
  font-size: 0.95rem;
}
.phase-label {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 800;
  margin-right: 0.5rem;
}
.mock-weekly {
  margin-top: 0.5rem;
  padding: 0.9rem 1.1rem;
  background: rgba(245, 158, 11, 0.08);
  border-radius: 8px;
  font-size: 0.88rem;
  color: #fcd34d;
}

/* Essay mockup */
.mock-essay-grid {
  padding: 1.5rem 2rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem;
  align-items: center;
  flex: 1;
}
.mock-left, .mock-right {
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  height: 100%;
}
.mock-left h4, .mock-right h4 { font-size: 0.9rem; color: var(--primary-light); margin-bottom: 0.75rem; }
.mock-left p { font-size: 0.85rem; line-height: 1.9; margin: 0.3rem 0; }
.essay-score {
  padding: 0.5rem 0.8rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border-radius: 6px;
  font-weight: 800;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}
.essay-fix {
  margin: 0.4rem 0;
  font-size: 0.85rem;
  line-height: 1.8;
}
.fix-wrong { background: rgba(239, 68, 68, 0.15); color: var(--error); padding: 0.1rem 0.3rem; border-radius: 4px; text-decoration: line-through; }
.fix-right { background: rgba(16, 185, 129, 0.15); color: var(--success); padding: 0.1rem 0.3rem; border-radius: 4px; }
.essay-tip {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 6px;
  color: #fcd34d;
  font-size: 0.85rem;
}

/* Speaking mockup */
.mock-speaking-flow {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  flex: 1;
}
.mock-mic {
  width: 100px; height: 100px;
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(236, 72, 153, 0.15));
  border: 3px solid var(--error);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6);
  animation: mic-pulse 1.5s infinite;
}
@keyframes mic-pulse {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6); }
  100% { box-shadow: 0 0 0 25px rgba(239, 68, 68, 0); }
}
.mock-ai-prompt, .mock-transcript {
  max-width: 500px;
  padding: 1rem 1.25rem;
  background: rgba(99, 102, 241, 0.08);
  border-left: 3px solid var(--primary);
  border-radius: 0 10px 10px 0;
  font-size: 0.95rem;
}
.mock-transcript { background: rgba(236, 72, 153, 0.06); border-left-color: var(--accent); }
.mock-score-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  width: 100%;
  max-width: 500px;
}
.score-ring {
  padding: 1rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 14px;
  text-align: center;
}
.score-num {
  font-size: 2.3rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.score-label { font-size: 0.8rem; color: var(--text-dim); }

/* Textbook mockup */
.mock-tb-input {
  margin: 1.5rem 2rem 0;
  padding: 1.25rem 1.5rem;
  background: rgba(99, 102, 241, 0.08);
  border-radius: 12px;
  line-height: 2;
}
.mock-tb-input strong { color: var(--accent); }
.mock-tb-output {
  padding: 1.5rem 2rem;
  flex: 1;
  overflow: hidden;
}
.mock-tb-output h3 {
  font-size: 1.4rem;
  background: linear-gradient(135deg, #818cf8, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}
.mock-tb-output h4 { color: var(--primary-light); margin: 0.6rem 0 0.3rem; font-size: 1rem; }
.mock-tb-output p { font-size: 0.88rem; line-height: 1.8; color: var(--text-dim); }
.tb-tip {
  margin: 0.5rem 0;
  padding: 0.5rem 0.75rem;
  background: rgba(245, 158, 11, 0.1);
  border-left: 3px solid var(--warning);
  border-radius: 0 6px 6px 0;
  color: #fcd34d;
  font-size: 0.85rem;
}

/* Parent (LINE) mockup */
.mock-parent { background: #7fc89e; border: none; }
.mock-line-header {
  background: #06C755;
  padding: 1rem 1.5rem;
  color: white;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.line-avatar {
  width: 40px; height: 40px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}
.line-name { font-weight: 800; }
.line-status { font-size: 0.75rem; opacity: 0.85; }
.mock-line-chat {
  background: #7fc89e;
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.line-bubble {
  background: white;
  color: #222;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  border-top-left-radius: 4px;
  max-width: 400px;
  font-size: 0.92rem;
  line-height: 2;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.line-bubble strong { color: #06C755; }
.line-time {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.78rem;
  padding-left: 0.5rem;
}

/* Animations */
.anim-fade-1 { animation: fade-in 0.6s ease-out 0.2s backwards; }
.anim-fade-2 { animation: fade-in 0.6s ease-out 1.5s backwards; }
.anim-fade-3 { animation: fade-in 0.6s ease-out 3s backwards; }
.anim-slide-up { animation: slide-up 0.6s ease-out 0.3s backwards; }
.anim-bounce { animation: bounce-in 0.6s ease-out 2.2s backwards; }
.anim-pulse { animation: mic-pulse 1.5s infinite; }
@keyframes fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slide-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes bounce-in {
  0% { opacity: 0; transform: scale(0.5); }
  60% { opacity: 1; transform: scale(1.15); }
  100% { transform: scale(1); }
}

/* Feature overlays */
.feature-overlays {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}
.feature-badge {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  padding: 0.5rem 1.2rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.95), rgba(236, 72, 153, 0.9));
  color: white;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 800;
  box-shadow: 0 5px 25px rgba(99, 102, 241, 0.5);
  backdrop-filter: blur(10px);
  animation: slide-in-left 0.5s ease-out;
}
@keyframes slide-in-left {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

.feature-callout {
  position: absolute;
  padding: 1rem 1.25rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.95), rgba(236, 72, 153, 0.9));
  color: white;
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.92rem;
  line-height: 1.6;
  max-width: 340px;
  box-shadow: 0 10px 40px rgba(245, 158, 11, 0.4);
  backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity 0.5s, transform 0.5s;
  pointer-events: none;
}
.feature-callout.show {
  opacity: 1;
  animation: slide-in-callout 0.6s ease-out forwards;
}
@keyframes slide-in-callout {
  from { opacity: 0; transform: translate(0, -20px) scale(0.9); }
  to { opacity: 1; transform: translate(0, 0) scale(1); }
}

/* Narration panel */
.narration-panel {
  background: linear-gradient(135deg, rgba(20, 20, 40, 0.92), rgba(30, 15, 50, 0.92));
  border-left: 1px solid var(--panel-border);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
  backdrop-filter: blur(20px);
}
.np-badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.25), rgba(236, 72, 153, 0.15));
  border: 1px solid rgba(99, 102, 241, 0.4);
  color: var(--primary-light);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  width: fit-content;
  animation: fade-in-up 0.6s ease-out;
}
#npTitle {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.3;
  background: linear-gradient(135deg, #818cf8, #ec4899, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fade-in-up 0.6s ease-out 0.1s backwards;
}
#npDesc {
  color: var(--text);
  line-height: 2;
  font-size: 1rem;
  animation: fade-in-up 0.6s ease-out 0.2s backwards;
}
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.np-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.np-stat {
  padding: 1rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 12px;
  text-align: center;
}
.nps-num {
  font-size: 1.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.nps-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
}

.np-wow {
  margin-top: auto;
  padding: 1rem 1.2rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(236, 72, 153, 0.06));
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-left: 3px solid var(--warning);
  border-radius: 0 10px 10px 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text);
}
.np-wow strong { color: #fcd34d; font-weight: 800; }

/* Feature chips */
.feature-chips {
  display: flex;
  gap: 0.4rem;
  padding: 0.85rem 1.5rem;
  background: rgba(10, 10, 26, 0.7);
  border-top: 1px solid var(--panel-border);
  overflow-x: auto;
  flex-shrink: 0;
  scrollbar-width: thin;
}
.fc-chip {
  padding: 0.5rem 0.85rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}
.fc-chip:hover { background: rgba(255, 255, 255, 0.08); color: var(--text); }
.fc-chip.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-color: transparent;
}

/* CTA bottom */
.demo-cta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(236, 72, 153, 0.05));
  border-top: 1px solid rgba(245, 158, 11, 0.2);
  flex-shrink: 0;
  gap: 1rem;
}
.dcta-text {
  font-size: 0.95rem;
  color: var(--text);
}
.dcta-text strong {
  font-size: 1.3rem;
  color: #fcd34d;
  font-weight: 900;
  padding: 0 0.3rem;
  font-family: 'Inter', monospace;
}
.dcta-btn {
  padding: 0.8rem 1.8rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-radius: 10px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 800;
  transition: all 0.2s;
  white-space: nowrap;
  animation: pulse-btn 2s infinite;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}
@keyframes pulse-btn {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}
.dcta-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 30px rgba(236, 72, 153, 0.5);
}

@media (max-width: 1024px) {
  .demo-viewport-wrap { grid-template-columns: 1fr; }
  .narration-panel { display: none; }
  .dc-right { display: none; }
  #npTitle { font-size: 1.5rem; }
}