/* ==========================================================================
   MulVidya AI Teacher Simulator — Studio UI/UX Redesign
   Inspired by Reference Classroom Studio Design
   ========================================================================== */

:root {
  --sim-bg: #070d18;
  --sim-bg-alt: #0a1322;
  --sim-card: rgba(13, 23, 40, 0.78);
  --sim-card-solid: #0d1728;
  --sim-card-hover: rgba(18, 32, 56, 0.88);
  --sim-border: rgba(140, 180, 248, 0.14);
  --sim-border-bright: rgba(140, 180, 248, 0.32);
  --sim-text: #f4f8ff;
  --sim-text-muted: #9db2ce;
  --sim-text-sub: #768ba6;
  --sim-primary: #5b8cff;
  --sim-primary-glow: rgba(91, 140, 255, 0.28);
  --sim-coral: #ff5263;
  --sim-coral-glow: rgba(255, 82, 99, 0.4);
  --sim-teal: #46d3ba;
  --sim-teal-glow: rgba(70, 211, 186, 0.25);
  --sim-gold: #f4c95d;
  --sim-radius-sm: 10px;
  --sim-radius-md: 16px;
  --sim-radius-lg: 22px;
  --sim-radius-xl: 28px;
  --sim-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
}

/* Background Atmosphere */
body.sim-page-body {
  background: 
    radial-gradient(circle at 18% 12%, rgba(91, 140, 255, 0.14) 0%, transparent 34%),
    radial-gradient(circle at 82% 8%, rgba(244, 201, 93, 0.08) 0%, transparent 28%),
    radial-gradient(circle at 50% 50%, rgba(70, 211, 186, 0.05) 0%, transparent 45%),
    var(--sim-bg);
  color: var(--sim-text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

.sim-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 20px 20px 80px;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.sim-hero {
  position: relative;
  border-radius: var(--sim-radius-xl);
  background: linear-gradient(135deg, rgba(17, 30, 52, 0.72) 0%, rgba(10, 19, 34, 0.88) 100%);
  border: 1px solid var(--sim-border);
  box-shadow: var(--sim-shadow);
  padding: 28px 36px;
  margin-bottom: 24px;
  overflow: hidden;
  backdrop-filter: blur(16px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.sim-hero::after {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 140, 255, 0.22) 0%, transparent 70%);
  pointer-events: none;
}

.sim-hero-content {
  flex: 1;
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.sim-hero-title {
  font-size: clamp(32px, 4.2vw, 56px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin: 0 0 12px;
  color: #fff;
}

.sim-hero-title .accent-text {
  background: linear-gradient(90deg, #78a3ff 0%, #f4c95d 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sim-hero-desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--sim-text-muted);
  margin: 0 0 20px;
  max-width: 640px;
}

.sim-hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sim-feature-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: #d6e4fa;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(140, 180, 248, 0.16);
  backdrop-filter: blur(8px);
  transition: all 0.2s ease;
}

.sim-feature-badge:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(140, 180, 248, 0.35);
  transform: translateY(-1px);
}

.sim-feature-badge .badge-icon {
  font-size: 14px;
}

.sim-hero-visual {
  flex: none;
  position: relative;
  z-index: 2;
  width: 280px;
  height: 170px;
  border-radius: var(--sim-radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
}

.sim-hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   Studio Workspace Grid (3 Columns)
   -------------------------------------------------------------------------- */
.sim-studio-grid {
  display: grid;
  grid-template-columns: 340px 1.45fr 310px;
  gap: 20px;
  align-items: start;
}

.sim-card {
  background: var(--sim-card);
  border: 1px solid var(--sim-border);
  box-shadow: var(--sim-shadow);
  border-radius: var(--sim-radius-xl);
  padding: 22px;
  backdrop-filter: blur(16px);
  position: relative;
  transition: border-color 0.22s ease;
}

.sim-card:hover {
  border-color: var(--sim-border-bright);
}

/* Card Headers */
.sim-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.sim-card-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sim-step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, var(--sim-primary) 0%, #7d6cff 100%);
  box-shadow: 0 4px 12px rgba(91, 140, 255, 0.35);
  flex: none;
}

.sim-card-title {
  font-size: 16px;
  font-weight: 850;
  color: #fff;
  margin: 0;
  line-height: 1.2;
}

.sim-card-subtitle {
  font-size: 11px;
  color: var(--sim-text-sub);
  margin: 2px 0 0;
}

/* --------------------------------------------------------------------------
   Column 1: Class & Lesson Setup
   -------------------------------------------------------------------------- */
.sim-setup-fields {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.sim-field-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.sim-field-label {
  font-size: 12px;
  font-weight: 750;
  color: #bfd0e8;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sim-select-wrap,
.sim-input-wrap {
  position: relative;
  width: 100%;
}

.sim-select-wrap select,
.sim-input-wrap input {
  width: 100%;
  appearance: none;
  background: rgba(5, 12, 22, 0.85);
  border: 1px solid var(--sim-border);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  outline: none;
  transition: all 0.2s ease;
  font-family: inherit;
}

.sim-select-wrap select {
  padding-right: 32px;
  cursor: pointer;
}

.sim-select-wrap::after {
  content: "⌄";
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-56%);
  font-size: 14px;
  color: var(--sim-text-sub);
  pointer-events: none;
}

.sim-select-wrap select:focus,
.sim-input-wrap input:focus {
  border-color: rgba(91, 140, 255, 0.7);
  box-shadow: 0 0 0 3px rgba(91, 140, 255, 0.12);
}

.sim-dual-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* Difficulty Segmented Control */
.sim-difficulty-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
  background: rgba(5, 12, 22, 0.85);
  border: 1px solid var(--sim-border);
  border-radius: 12px;
  padding: 4px;
}

.sim-diff-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--sim-text-muted);
  font-size: 11px;
  font-weight: 700;
  padding: 8px 4px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.18s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.sim-diff-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.sim-diff-btn.active {
  background: linear-gradient(135deg, rgba(91, 140, 255, 0.5) 0%, rgba(125, 108, 255, 0.45) 100%);
  color: #fff;
  border: 1px solid rgba(91, 140, 255, 0.6);
  box-shadow: 0 2px 8px rgba(91, 140, 255, 0.25);
}

/* Classroom Type Visual Selector Cards */
.sim-classroom-types {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 4px;
}

.sim-type-card {
  position: relative;
  background: rgba(5, 12, 22, 0.85);
  border: 1px solid var(--sim-border);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  padding-bottom: 6px;
}

.sim-type-card:hover {
  border-color: rgba(91, 140, 255, 0.45);
  transform: translateY(-2px);
}

.sim-type-card.active {
  border-color: var(--sim-primary);
  box-shadow: 0 0 0 2px rgba(91, 140, 255, 0.4), 0 8px 18px rgba(0, 0, 0, 0.3);
}

.sim-type-thumb {
  width: 100%;
  height: 48px;
  object-fit: cover;
  display: block;
}

.sim-type-name {
  font-size: 10px;
  font-weight: 800;
  color: #d6e4fa;
  margin-top: 5px;
  padding: 0 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --------------------------------------------------------------------------
   Column 2 (Center): Meet Your Students + Live Console
   -------------------------------------------------------------------------- */
.sim-center-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Card 2: Meet Your Students */
.sim-students-card {
  padding: 20px 22px;
}

.sim-btn-ghost {
  appearance: none;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--sim-border);
  color: #dbe7fa;
  font-size: 12px;
  font-weight: 750;
  padding: 7px 13px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sim-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(140, 180, 248, 0.35);
  color: #fff;
}

/* Desk Roster of Students (5 students: Riya, Arjun, Moumita, Rahul, Ananya) */
.sim-students-roster {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 4px;
}

@media (max-width: 1180px) {
  .sim-students-roster {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }
}

.sim-student-desk-card {
  position: relative;
  background: linear-gradient(180deg, rgba(16, 28, 48, 0.8) 0%, rgba(9, 16, 28, 0.95) 100%);
  border: 1px solid var(--sim-border);
  border-radius: var(--sim-radius-md);
  padding: 10px 10px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.22s ease;
  cursor: pointer;
}

.sim-student-desk-card:hover {
  border-color: rgba(91, 140, 255, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

.sim-student-avatar-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
  margin-bottom: 8px;
  background: #142338;
}

.sim-student-avatar-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Used for students without a photo asset (e.g. Moumita): a centered emoji
   avatar instead of a broken/missing <img>. */
.sim-student-avatar-wrap.emoji-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  line-height: 1;
  background: linear-gradient(160deg, #1c3252, #0d1a2c);
}

.sim-student-desk-name {
  font-size: 13px;
  font-weight: 850;
  color: #fff;
  line-height: 1.2;
}

.sim-student-desk-trait {
  font-size: 10px;
  color: var(--sim-text-sub);
  margin-top: 2px;
}

.sim-student-voice-btn {
  appearance: none;
  border: 0;
  background: rgba(91, 140, 255, 0.16);
  border: 1px solid rgba(91, 140, 255, 0.3);
  color: #8fb5ff;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 10px;
  font-weight: 750;
  margin-top: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.18s ease;
}

.sim-student-voice-btn:hover {
  background: var(--sim-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 2px 10px rgba(91, 140, 255, 0.4);
}

/* Card 3: Start Teaching (Large Live Console) */
.sim-live-console-card {
  padding: 24px 26px;
  background: radial-gradient(circle at 50% 30%, rgba(255, 82, 99, 0.1) 0%, transparent 65%), var(--sim-card);
  border: 1px solid rgba(255, 82, 99, 0.25);
  text-align: center;
}

.sim-console-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 14px 0 10px;
}

.sim-mic-halo-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin: 10px 0 16px;
}

/* Realtime Waveform Canvas surrounding mic */
.sim-waveform-canvas {
  position: absolute;
  width: 100%;
  max-width: 440px;
  height: 72px;
  pointer-events: none;
  z-index: 1;
}

/* Central Glowing Microphone Button */
.sim-hero-mic-btn {
  position: relative;
  z-index: 2;
  appearance: none;
  border: 0;
  width: 82px;
  height: 82px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff4d61 0%, #ff7a59 100%);
  color: #fff;
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: 
    0 0 0 8px rgba(255, 77, 97, 0.16),
    0 0 0 16px rgba(255, 77, 97, 0.08),
    0 12px 32px rgba(255, 77, 97, 0.45);
  transition: all 0.24s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sim-hero-mic-btn svg {
  width: 36px;
  height: 36px;
  fill: currentColor;
  transition: transform 0.2s ease;
}

.sim-hero-mic-btn:hover {
  transform: scale(1.06);
  box-shadow: 
    0 0 0 12px rgba(255, 77, 97, 0.22),
    0 0 0 22px rgba(255, 77, 97, 0.1),
    0 16px 40px rgba(255, 77, 97, 0.6);
}

.sim-hero-mic-btn.active,
.sim-hero-mic-btn.listening {
  background: linear-gradient(135deg, #46d3ba 0%, #5b8cff 100%);
  box-shadow: 
    0 0 0 10px rgba(70, 211, 186, 0.22),
    0 0 0 20px rgba(70, 211, 186, 0.1),
    0 14px 38px rgba(70, 211, 186, 0.5);
  animation: heroMicPulse 1.8s ease-in-out infinite;
}

@keyframes heroMicPulse {
  0%, 100% {
    box-shadow: 0 0 0 8px rgba(70, 211, 186, 0.2), 0 0 0 16px rgba(70, 211, 186, 0.08), 0 12px 32px rgba(70, 211, 186, 0.45);
  }
  50% {
    box-shadow: 0 0 0 14px rgba(70, 211, 186, 0.3), 0 0 0 28px rgba(70, 211, 186, 0.12), 0 18px 44px rgba(70, 211, 186, 0.65);
  }
}

.sim-live-status-headline {
  font-size: 17px;
  font-weight: 850;
  color: #fff;
  margin: 6px 0 2px;
}

.sim-live-status-subtext {
  font-size: 12px;
  color: var(--sim-text-sub);
  max-width: 380px;
  margin: 0 auto;
}

/* Live Console Footer Toolbar */
.sim-console-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* 4 Quick Action Cards */
.sim-quick-actions-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.sim-action-card {
  background: var(--sim-card);
  border: 1px solid var(--sim-border);
  border-radius: var(--sim-radius-md);
  padding: 13px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sim-action-card:hover {
  background: var(--sim-card-hover);
  border-color: rgba(91, 140, 255, 0.4);
  transform: translateY(-2px);
}

.sim-action-icon {
  font-size: 20px;
  line-height: 1;
}

.sim-action-title {
  font-size: 13px;
  font-weight: 850;
  color: #fff;
}

.sim-action-desc {
  font-size: 10px;
  color: var(--sim-text-sub);
  line-height: 1.35;
}

/* --------------------------------------------------------------------------
   Column 3 (Right): Session Options + Quick Scenarios
   -------------------------------------------------------------------------- */
.sim-right-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Session Options Toggles */
.sim-options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sim-option-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.sim-option-row:last-child {
  border-bottom: 0;
}

.sim-option-label {
  font-size: 12px;
  font-weight: 700;
  color: #d3e1f5;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Modern Switch Toggle */
.sim-switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 22px;
  flex: none;
}

.sim-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.sim-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: 0.22s;
  border-radius: 999px;
}

.sim-slider::before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
  border-radius: 50%;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.35);
}

.sim-switch input:checked + .sim-slider {
  background: linear-gradient(135deg, var(--sim-primary) 0%, #7d6cff 100%);
  border-color: rgba(91, 140, 255, 0.5);
}

.sim-switch input:checked + .sim-slider::before {
  transform: translateX(16px);
}

/* Quick Scenarios List */
.sim-scenarios-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.sim-scenario-item {
  appearance: none;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--sim-border);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: all 0.18s ease;
  color: var(--sim-text);
  font-family: inherit;
}

.sim-scenario-item:hover {
  background: rgba(91, 140, 255, 0.12);
  border-color: rgba(91, 140, 255, 0.35);
  transform: translateX(3px);
}

.sim-scenario-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sim-scenario-icon {
  font-size: 16px;
}

.sim-scenario-name {
  font-size: 12px;
  font-weight: 750;
  color: #e4efff;
}

.sim-scenario-arrow {
  color: var(--sim-text-sub);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   Active Classroom Stage (Smooth Transition)
   -------------------------------------------------------------------------- */
.sim-active-session-wrap {
  margin-top: 24px;
  animation: sessionEnter 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes sessionEnter {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Mobile-First Responsive Layout
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .sim-studio-grid {
    grid-template-columns: 320px 1fr;
  }
  .sim-right-column {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .sim-container {
    padding: 12px 12px 60px;
  }
  
  .sim-hero {
    padding: 20px 18px;
    flex-direction: column;
    align-items: flex-start;
  }
  
  .sim-hero-visual {
    width: 100%;
    height: 140px;
  }
  
  .sim-studio-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .sim-right-column {
    grid-column: auto;
    grid-template-columns: 1fr;
  }
  
  .sim-students-roster {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  
  .sim-quick-actions-row {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .sim-hero-mic-btn {
    width: 72px;
    height: 72px;
  }
  
  .sim-hero-mic-btn svg {
    width: 30px;
    height: 30px;
  }
}