/* ==========================================================================
   EduFocus Mobile App Design System
   Modern, Clean, High-Precision Educational UI
   ========================================================================== */

:root {
  --app-font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --app-font-display: 'Outfit', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --app-font-mono: 'Outfit', 'SF Mono', monospace;

  --app-bg: #F8FAFC;
  --app-card: #FFFFFF;
  --app-dark: #0F172A;
  --app-dark-card: #1E293B;
  --app-lime: #D4F637;
  --app-lime-hover: #C5E929;
  --app-lime-text: #0F172A;
  --app-primary: #10B981;
  --app-primary-dark: #059669;
  --app-border: #E2E8F0;
  --app-border-light: #F1F5F9;
  --app-text-primary: #0F172A;
  --app-text-secondary: #475569;
  --app-text-muted: #94A3B8;

  --app-radius-xs: 8px;
  --app-radius-sm: 12px;
  --app-radius-md: 16px;
  --app-radius-lg: 20px;
  --app-radius-xl: 26px;
  --app-radius-pill: 9999px;

  --app-shadow-xs: 0 1px 3px rgba(15, 23, 42, 0.04);
  --app-shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.05);
  --app-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.07);
  --app-shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.1);
}

/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body.mobile-theme {
  font-family: var(--app-font);
  background-color: var(--app-bg);
  color: var(--app-text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: stretch;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}

/* App Shell (Phone Container) */
.mobile-app-shell {
  width: 100%;
  max-width: 440px;
  min-height: 100vh;
  background: var(--app-bg);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.05);
  padding-bottom: 96px; /* space for bottom nav */
}

/* App Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px 14px;
}

.user-greeting-wrap {
  display: flex;
  flex-direction: column;
}

.user-greeting-label {
  font-size: 12px;
  color: var(--app-text-secondary);
  font-weight: 600;
  letter-spacing: -0.2px;
}

.user-greeting-name {
  font-family: var(--app-font-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--app-text-primary);
  letter-spacing: -0.4px;
}

.header-action-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--app-card);
  border: 1px solid var(--app-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--app-text-primary);
  cursor: pointer;
  box-shadow: var(--app-shadow-xs);
  position: relative;
  transition: transform 0.15s ease, background 0.15s ease;
}

.header-action-btn:active {
  transform: scale(0.92);
  background: var(--app-border-light);
}

.header-action-dot {
  position: absolute;
  top: 9px;
  right: 9px;
  width: 8px;
  height: 8px;
  background: #10B981;
  border: 2px solid var(--app-card);
  border-radius: 50%;
}

/* ==========================================================================
   Clean & Modern Student Home UI
   ========================================================================== */

.student-home-container {
  padding: 0 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Hero Join Card */
.hero-join-card {
  background: var(--app-card);
  border-radius: var(--app-radius-xl);
  padding: 22px 20px;
  border: 1px solid var(--app-border);
  box-shadow: var(--app-shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
}

.hero-join-card::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(212, 246, 55, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero-join-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hero-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F1F5F9;
  padding: 5px 12px;
  border-radius: var(--app-radius-pill);
  font-size: 11px;
  font-weight: 700;
  color: var(--app-text-secondary);
  letter-spacing: 0.2px;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
  animation: pulseAnimation 2s infinite ease-in-out;
}

@keyframes pulseAnimation {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

.hero-focus-score {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  padding: 4px 10px;
  border-radius: 10px;
}

.focus-score-num {
  font-family: var(--app-font-display);
  font-size: 14px;
  font-weight: 800;
  color: #065F46;
}

.focus-score-label {
  font-size: 11px;
  font-weight: 700;
  color: #059669;
  text-transform: uppercase;
}

.hero-join-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-join-title {
  font-family: var(--app-font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--app-text-primary);
  letter-spacing: -0.5px;
}

.hero-join-desc {
  font-size: 13px;
  line-height: 1.45;
  color: var(--app-text-secondary);
}

/* Action Buttons Stack */
.hero-actions-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-hero-primary {
  width: 100%;
  height: 52px;
  background: var(--app-lime);
  color: var(--app-lime-text);
  border: none;
  border-radius: var(--app-radius-pill);
  font-family: var(--app-font);
  font-size: 15px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(212, 246, 55, 0.45);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-hero-primary:active {
  transform: scale(0.98);
  box-shadow: 0 2px 10px rgba(212, 246, 55, 0.3);
}

.btn-hero-secondary {
  width: 100%;
  height: 48px;
  background: var(--app-dark);
  color: #FFFFFF;
  border: none;
  border-radius: var(--app-radius-pill);
  font-family: var(--app-font);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn-hero-secondary:active {
  transform: scale(0.98);
  background: #1E293B;
}

/* Student Profile Pill in Hero */
.hero-student-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #F8FAFC;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-md);
  padding: 10px 12px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.hero-student-pill:active {
  background: #F1F5F9;
}

.student-pill-avatar {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: #E2E8F0;
  color: var(--app-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.student-pill-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.student-pill-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--app-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.student-pill-device {
  font-size: 11px;
  color: var(--app-text-muted);
}

.student-pill-arrow {
  font-size: 18px;
  color: var(--app-text-muted);
  font-weight: 600;
}

/* Section Header */
.app-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 4px;
}

.app-section-title {
  font-family: var(--app-font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--app-text-primary);
  letter-spacing: -0.3px;
}

.app-section-subtitle {
  font-size: 12px;
  font-weight: 600;
  color: var(--app-text-muted);
}

/* 2x2 Interactive Learning Grid */
.learning-grid-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.learning-card {
  background: var(--app-card);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  box-shadow: var(--app-shadow-xs);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.learning-card:active {
  transform: scale(0.97);
  border-color: #CBD5E1;
}

.learning-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.learning-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-quiz {
  background: #EEF2FF;
  color: #4F46E5;
}

.icon-material {
  background: #EFF6FF;
  color: #2563EB;
}

.icon-focus {
  background: #ECFDF5;
  color: #059669;
}

.icon-profile {
  background: #FFFBEB;
  color: #D97706;
}

.learning-badge {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--app-radius-pill);
  letter-spacing: 0.3px;
}

.badge-quiz {
  background: #EEF2FF;
  color: #4338CA;
}

.badge-material {
  background: #EFF6FF;
  color: #1D4ED8;
}

.badge-focus {
  background: #ECFDF5;
  color: #047857;
}

.badge-profile {
  background: #FFFBEB;
  color: #B45309;
}

.learning-card-title {
  font-family: var(--app-font-display);
  font-size: 15px;
  font-weight: 800;
  color: var(--app-text-primary);
  letter-spacing: -0.2px;
}

.learning-card-desc {
  font-size: 12px;
  color: var(--app-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Focus Tips Notice Card */
.focus-notice-card {
  background: #F1F5F9;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: 14px 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.notice-icon {
  color: #2563EB;
  flex-shrink: 0;
  margin-top: 1px;
}

.notice-content {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.notice-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--app-text-primary);
}

.notice-desc {
  font-size: 12px;
  line-height: 1.45;
  color: var(--app-text-secondary);
}

/* Cards Carousel Section */
.section-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px 12px;
}

.section-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--app-text-primary);
  letter-spacing: -0.3px;
}

.section-action-link {
  font-size: 13px;
  font-weight: 700;
  color: var(--app-text-secondary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 4px;
}

.cards-carousel-container {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 4px 20px 16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.cards-carousel-container::-webkit-scrollbar {
  display: none;
}

/* Card 1: Electric Lime Card (Ronas IT Iconic) */
.fin-card {
  flex: 0 0 240px;
  height: 145px;
  border-radius: var(--app-radius-lg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  scroll-snap-align: start;
  position: relative;
  overflow: hidden;
  box-shadow: var(--app-shadow-md);
  transition: transform 0.2s ease;
}

.fin-card:active {
  transform: scale(0.98);
}

.card-lime {
  background: var(--app-lime);
  color: var(--app-lime-text);
  border: 1px solid rgba(0,0,0,0.05);
}

.card-lime::before {
  content: 'EDUFOCUS';
  position: absolute;
  right: -20px;
  bottom: -15px;
  font-size: 52px;
  font-weight: 900;
  color: rgba(0, 0, 0, 0.06);
  letter-spacing: -1px;
  pointer-events: none;
}

.card-dark {
  background: var(--app-dark);
  color: #FFFFFF;
}

.card-dark::before {
  content: 'FOCUS';
  position: absolute;
  right: -10px;
  bottom: -15px;
  font-size: 52px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.04);
  letter-spacing: -1px;
  pointer-events: none;
}

.card-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-brand {
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.3px;
}

.card-chip {
  width: 28px;
  height: 20px;
  border-radius: 4px;
  background: rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-dark .card-chip {
  background: rgba(255,255,255,0.15);
}

.card-middle-label {
  font-size: 11px;
  font-weight: 600;
  opacity: 0.75;
  text-transform: uppercase;
}

.card-middle-val {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.2px;
}

.card-bottom-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
}

.card-pill-tag {
  background: rgba(0, 0, 0, 0.1);
  padding: 4px 10px;
  border-radius: var(--app-radius-pill);
  font-size: 11px;
}

.card-dark .card-pill-tag {
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
}

/* Actions List Section (Ronas IT style menu items) */
.action-list-card {
  background: var(--app-card);
  border-radius: var(--radius-xl, 30px);
  padding: 8px 12px;
  margin: 0 20px 20px;
  box-shadow: var(--app-shadow-md);
  border: 1px solid rgba(232, 236, 242, 0.8);
}

.action-row-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 12px;
  border-radius: var(--app-radius-md);
  cursor: pointer;
  transition: background 0.15s ease;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid #F3F4F6;
}

.action-row-item:last-child {
  border-bottom: none;
}

.action-row-item:active {
  background: #F8F9FA;
}

.action-icon-box {
  width: 46px;
  height: 46px;
  border-radius: var(--app-radius-md);
  background: #F3F4F6;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.action-icon-box.lime {
  background: var(--app-lime);
  color: var(--app-lime-text);
}

.action-icon-box.dark {
  background: var(--app-dark);
  color: #FFFFFF;
}

.action-content-wrap {
  flex: 1;
}

.action-item-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--app-text-primary);
  margin-bottom: 2px;
}

.action-item-subtitle {
  font-size: 12px;
  color: var(--app-text-secondary);
}

.action-chevron {
  font-size: 16px;
  color: var(--app-text-muted);
  font-weight: 700;
}

/* Floating Bottom Navigation Bar */
.mobile-bottom-nav {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 400px;
  height: 66px;
  background: #FFFFFF;
  border-radius: var(--app-radius-pill);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
  border: 1px solid rgba(232, 236, 242, 0.9);
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 0 12px;
  z-index: 990;
}

.nav-tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: var(--app-radius-pill);
  color: var(--app-text-secondary);
  transition: all 0.2s ease;
}

.nav-tab-icon {
  font-size: 20px;
  margin-bottom: 2px;
}

.nav-tab-label {
  font-size: 10px;
  font-weight: 600;
}

.nav-tab-btn.active {
  color: var(--app-dark);
}

.nav-tab-btn.active .nav-tab-icon {
  transform: translateY(-1px);
}

/* ==========================================================================
   Full Screen Focus & Lock State (Ronas IT Aesthetic)
   ========================================================================== */
.focus-lock-container {
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.focus-ring-wrapper {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 20px auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.focus-pulse-glow {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 246, 55, 0.25) 0%, rgba(212, 246, 55, 0) 70%);
  animation: pulseGlow 2.5s infinite ease-in-out;
}

@keyframes pulseGlow {
  0%, 100% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.1); opacity: 1; }
}

.focus-circle-svg {
  transform: rotate(-90deg);
}

.focus-timer-text-wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.focus-timer-digits {
  font-size: 42px;
  font-weight: 900;
  color: var(--app-dark);
  letter-spacing: -1px;
}

.focus-timer-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--app-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.focus-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--app-dark);
  color: #FFFFFF;
  padding: 8px 18px;
  border-radius: var(--app-radius-pill);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 14px;
}

.focus-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--app-lime);
  box-shadow: 0 0 8px var(--app-lime);
}

.focus-warning-notice {
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: var(--app-radius-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: #92400E;
  margin-top: 14px;
  width: 100%;
  text-align: left;
}

/* Modals & Dialogs (Ronas IT style) */
.mobile-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(17, 24, 39, 0.6);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: flex-end; /* bottom sheet feel on mobile */
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.mobile-modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-bottom-sheet {
  width: 100%;
  max-width: 440px;
  background: #FFFFFF;
  border-radius: 32px 32px 0 0;
  padding: 24px;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.15);
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 85vh;
  overflow-y: auto;
}

.mobile-modal-overlay.active .mobile-bottom-sheet {
  transform: translateY(0);
}

.sheet-handle {
  width: 38px;
  height: 4px;
  background: #E5E7EB;
  border-radius: 2px;
  margin: 0 auto 16px;
}

.sheet-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--app-text-primary);
  margin-bottom: 6px;
  letter-spacing: -0.3px;
}

.sheet-subtitle {
  font-size: 13px;
  color: var(--app-text-secondary);
  margin-bottom: 20px;
}

/* Form Inputs in Mobile */
.mobile-input-field {
  width: 100%;
  background: #F3F4F6;
  border: 1.5px solid transparent;
  border-radius: var(--app-radius-md);
  padding: 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--app-text-primary);
  outline: none;
  transition: all 0.2s ease;
  margin-bottom: 14px;
}

.mobile-input-field:focus {
  background: #FFFFFF;
  border-color: var(--app-dark);
  box-shadow: 0 0 0 4px rgba(17, 24, 39, 0.05);
}

.mobile-btn-lime {
  width: 100%;
  background: var(--app-lime);
  color: var(--app-lime-text);
  border: none;
  border-radius: var(--app-radius-pill);
  padding: 16px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.mobile-btn-lime:active {
  transform: scale(0.98);
  background: var(--app-lime-hover);
}

.mobile-btn-dark {
  width: 100%;
  background: var(--app-dark);
  color: #FFFFFF;
  border: none;
  border-radius: var(--app-radius-pill);
  padding: 16px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.mobile-btn-dark:active {
  transform: scale(0.98);
  background: #000000;
}

/* ==========================================================================
   In-App Camera QR Code Scanner (Ronas IT Style)
   ========================================================================== */
.qr-scanner-fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #0A0D14;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  overflow: hidden;
  box-sizing: border-box;
}

.scanner-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
  padding-top: 10px;
}

.scanner-pill-badge {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  color: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--app-radius-pill);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.scanner-pill-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--app-lime);
  box-shadow: 0 0 10px var(--app-lime);
  animation: pulseGlow 1.5s infinite;
}

.scanner-close-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.scanner-close-btn:active {
  transform: scale(0.92);
  background: rgba(255, 255, 255, 0.3);
}

.scanner-camera-container {
  position: relative;
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
  border-radius: 32px;
  overflow: hidden;
  background: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

#qr-reader-video {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
}

#qr-reader {
  width: 100% !important;
  border: none !important;
}

#qr-reader__scan_region {
  background: transparent !important;
}

#qr-reader__dashboard {
  display: none !important;
}

/* Ronas IT Electric Lime Viewfinder Box */
.scanner-frame-overlay {
  position: absolute;
  top: 15%;
  left: 15%;
  width: 70%;
  height: 70%;
  pointer-events: none;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 24px;
  box-sizing: border-box;
}

.scanner-corner {
  position: absolute;
  width: 28px;
  height: 28px;
  border-color: var(--app-lime);
  border-style: solid;
  pointer-events: none;
}

.corner-tl {
  top: -2px;
  left: -2px;
  border-width: 4px 0 0 4px;
  border-top-left-radius: 24px;
}

.corner-tr {
  top: -2px;
  right: -2px;
  border-width: 4px 4px 0 0;
  border-top-right-radius: 24px;
}

.corner-bl {
  bottom: -2px;
  left: -2px;
  border-width: 0 0 4px 4px;
  border-bottom-left-radius: 24px;
}

.corner-br {
  bottom: -2px;
  right: -2px;
  border-width: 0 4px 4px 0;
  border-bottom-right-radius: 24px;
}

/* Animated Laser Line */
.scanner-laser-line {
  position: absolute;
  top: 0;
  left: 5%;
  width: 90%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--app-lime), transparent);
  box-shadow: 0 0 16px var(--app-lime);
  animation: laserScan 2.4s ease-in-out infinite;
  border-radius: 2px;
}

@keyframes laserScan {
  0% { top: 8%; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: 92%; opacity: 0; }
}

.scanner-bottom-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  z-index: 10;
  padding-bottom: 20px;
}

.scanner-hint-text {
  font-size: 14px;
  font-weight: 600;
  color: #9CA3AF;
  text-align: center;
  line-height: 1.4;
  max-width: 300px;
}

.scanner-action-buttons-row {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 380px;
}

.scanner-sub-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--app-radius-pill);
  padding: 14px;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.scanner-sub-btn:active {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(0.97);
}

/* Calculator Keypad */
.calc-btn {
  height: 54px;
  border-radius: var(--app-radius-md);
  font-size: 18px;
  font-weight: 700;
  border: 1px solid var(--app-border);
  cursor: pointer;
  transition: transform 0.1s ease, background 0.1s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}
.calc-btn:active {
  transform: scale(0.93);
}
.calc-btn.num {
  background: #FFFFFF;
  color: var(--app-dark);
}
.calc-btn.op {
  background: #F3F4F6;
  color: #374151;
}
.calc-btn.equal {
  background: var(--app-lime);
  color: var(--app-dark);
  border-color: var(--app-lime);
  font-size: 22px;
}

/* ============================================
   ONBOARDING & PERMISSIONS SCREENS
   ============================================ */
.onboarding-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0 16px;
}
.onboarding-brand-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #FFFFFF;
  padding: 6px 12px;
  border-radius: var(--app-radius-pill);
  border: 1px solid var(--app-border);
  font-weight: 800;
  font-size: 13px;
  color: var(--app-dark);
}
.onboarding-chip-logo {
  width: 22px;
  height: 22px;
}
.onboarding-skip-btn {
  background: none;
  border: none;
  color: var(--app-text-secondary);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  padding: 6px 10px;
}
.onboarding-carousel-viewport {
  overflow: hidden;
  position: relative;
  width: 100%;
}
.onboarding-slides-track {
  display: flex;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  width: 100%;
}
.onboarding-slide {
  min-width: 100%;
  max-width: 100%;
  flex-shrink: 0;
  text-align: center;
  padding: 20px 8px 10px;
}
.onboarding-visual-box {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.onboarding-visual-glow {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 246, 55, 0.4) 0%, transparent 70%);
  animation: pulse-glow 3s infinite alternate;
}
.onboarding-visual-icon-wrap {
  position: relative;
  z-index: 2;
  width: 140px;
  height: 140px;
  border-radius: 36px;
  background: #111827;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 16px 36px rgba(17, 24, 39, 0.25);
  border: 2px solid rgba(212, 246, 55, 0.3);
}
.onboarding-big-logo {
  width: 80px;
  height: 80px;
  filter: drop-shadow(0 4px 16px rgba(212, 246, 55, 0.5));
}
.onboarding-pill-tag {
  display: inline-block;
  padding: 5px 14px;
  background: #ECFDF5;
  color: #059669;
  font-size: 11px;
  font-weight: 800;
  border-radius: var(--app-radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.onboarding-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--app-dark);
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 12px;
}
.onboarding-description {
  font-size: 14px;
  color: var(--app-text-secondary);
  line-height: 1.6;
  max-width: 320px;
  margin: 0 auto 16px;
}
.onboarding-footer {
  margin-top: 16px;
}
.onboarding-dots-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
}
.onboarding-dot {
  width: 8px;
  height: 8px;
  border-radius: 9999px;
  background: #D1D5DB;
  transition: all 0.3s ease;
  cursor: pointer;
}
.onboarding-dot.active {
  width: 28px;
  background: var(--app-dark);
}
.onboarding-next-btn {
  box-shadow: 0 10px 24px rgba(212, 246, 55, 0.4);
}

/* Permissions View */
.perm-main-icon-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 1px solid var(--app-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 16px;
}
.perm-cards-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.perm-card-row {
  background: #FFFFFF;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--app-shadow-sm);
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.perm-card-row:active {
  transform: scale(0.98);
}
.perm-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.perm-card-content {
  flex: 1;
  text-align: left;
}
.perm-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--app-dark);
}
.perm-card-desc {
  font-size: 11px;
  color: var(--app-text-secondary);
  line-height: 1.4;
  margin-top: 2px;
}
.perm-badge-pill {
  font-size: 11px;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: var(--app-radius-pill);
  background: #F3F4F6;
  color: #374151;
  white-space: nowrap;
}
.perm-badge-pill.active {
  background: #ECFDF5;
  color: #059669;
}
.perm-badge-pill.pending {
  background: #FEF3C7;
  color: #D97706;
}

/* ============================================ */
/* HEMIS INTEGRATION SCREENS (OTM & TALABA ID)   */
/* ============================================ */

.hemis-flow-container {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.hemis-screen-header-art {
  width: 100%;
  height: 220px;
  overflow: hidden;
  border-radius: 0 0 32px 32px;
  background: linear-gradient(180deg, #E2E8F0 0%, #CBD5E1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04);
}

.hemis-screen-header-art img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Search bar on University Selection */
.hemis-search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #FFFFFF;
  border: 1.5px solid var(--app-border);
  border-radius: var(--app-radius-pill);
  padding: 8px 14px;
  margin: 0 0 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.hemis-search-bar:focus-within {
  border-color: #2563EB;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.hemis-search-icon {
  font-size: 16px;
  color: #64748B;
  flex-shrink: 0;
}

.hemis-search-input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  font-weight: 600;
  color: #0F172A;
}

.hemis-search-clear {
  background: #E2E8F0;
  border: none;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #64748B;
  cursor: pointer;
}

.hemis-univ-title {
  font-size: 23px;
  font-weight: 800;
  font-style: italic;
  color: #0F172A;
  text-align: center;
  margin: 6px 0 16px;
  letter-spacing: -0.3px;
}

.hemis-univ-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 52vh;
  overflow-y: auto;
  padding-right: 2px;
}

.hemis-univ-card {
  background: #BFDBFE;
  border-radius: 18px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  user-select: none;
}

.hemis-univ-card:hover {
  background: #93C5FD;
}

.hemis-univ-card:active {
  transform: scale(0.98);
}

.hemis-univ-card.selected {
  border-color: #2563EB;
  background: #93C5FD;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.2);
}

.hemis-univ-icon {
  font-size: 22px;
  color: #1E3A8A;
  flex-shrink: 0;
}

.hemis-univ-name {
  font-size: 13.5px;
  font-weight: 700;
  color: #1E3A8A;
  line-height: 1.35;
  text-align: left;
}

/* HEMIS Login Screen */
.hemis-welcome-title {
  font-size: 30px;
  font-weight: 900;
  font-style: italic;
  color: #0F172A;
  text-align: center;
  margin: 4px 0 2px;
  letter-spacing: -0.5px;
}

.hemis-welcome-subtitle {
  font-size: 13.5px;
  color: #475569;
  text-align: center;
  margin-bottom: 8px;
}

.hemis-help-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: #2563EB;
  font-weight: 700;
  font-size: 13px;
  text-decoration: none;
  margin-bottom: 18px;
}

.hemis-otm-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: var(--app-radius-lg);
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 12px;
  color: #1E3A8A;
  font-weight: 700;
}

.hemis-otm-change-btn {
  background: transparent;
  border: none;
  color: #2563EB;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
  text-decoration: underline;
}

.hemis-input-group {
  background: #E2E8F0;
  border-radius: 16px;
  padding: 13px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  border: 1.5px solid transparent;
  transition: all 0.2s ease;
}

.hemis-input-group:focus-within {
  border-color: #2563EB;
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.hemis-input-icon {
  font-size: 18px;
  color: #64748B;
  flex-shrink: 0;
}

.hemis-input-field {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: 15px;
  font-weight: 600;
  color: #0F172A;
}

.hemis-input-field::placeholder {
  color: #94A3B8;
  font-weight: 500;
}

.hemis-eye-toggle {
  background: transparent;
  border: none;
  font-size: 18px;
  color: #64748B;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hemis-action-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
}

.hemis-btn-back {
  flex: 1;
  border: 2px solid #2563EB;
  background: #FFFFFF;
  color: #2563EB;
  border-radius: 9999px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background 0.15s ease;
}

.hemis-btn-back:hover {
  background: #EFF6FF;
}

.hemis-btn-back:active {
  transform: scale(0.98);
}

.hemis-btn-login {
  flex: 1.1;
  border: none;
  background: #2563EB;
  color: #FFFFFF;
  border-radius: 9999px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.32);
  transition: transform 0.15s ease, background 0.15s ease;
}

.hemis-btn-login:hover {
  background: #1D4ED8;
}

.hemis-btn-login:active {
  transform: scale(0.98);
}

/* ============================================ */
/* DESKTOP & WIDE SCREEN RESPONSIVE STYLING     */
/* ============================================ */
@media (min-width: 768px) {
  body {
    background: #F1F5F9;
  }

  .mobile-app-shell {
    max-width: 1160px;
    background: transparent;
    box-shadow: none;
    padding: 24px 32px 100px;
  }

  /* Hide simulated phone status bar on desktop */
  .mobile-status-bar {
    display: none !important;
  }

  .app-header {
    background: #FFFFFF;
    border: 1px solid var(--app-border);
    border-radius: 20px;
    padding: 16px 28px;
    margin-bottom: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  }

  /* Two Column Layout on Desktop for Student Home */
  .student-home-container {
    display: grid;
    grid-template-columns: 1.15fr 0.95fr;
    gap: 24px;
    align-items: start;
    padding: 0;
  }

  .hero-join-card {
    padding: 28px 26px;
    border-radius: 28px;
  }

  .hero-actions-stack {
    display: flex;
    flex-direction: row;
    gap: 12px;
  }

  .btn-hero-primary, .btn-hero-secondary {
    flex: 1;
  }

  .focus-notice-card {
    grid-column: 1 / -1;
    margin-top: 8px;
  }

  .fin-card {
    min-width: 0;
    width: 100%;
    margin-right: 0;
  }

  /* Action list on desktop */
  .action-list-card {
    background: #FFFFFF;
    border-radius: 24px;
    padding: 16px;
    border: 1px solid var(--app-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  }

  /* Onboarding & HEMIS screens on Desktop */
  #screen-onboarding {
    max-width: 540px;
    margin: 20px auto;
    background: #FFFFFF;
    border: 1px solid var(--app-border);
    border-radius: 32px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    overflow: hidden;
  }

  #onboarding-step-slides {
    padding: 24px 28px;
  }

  #onboarding-step-univ, #onboarding-step-login {
    padding-bottom: 24px;
  }

  #onboarding-step-permissions {
    padding: 24px 28px;
  }

  /* Modals / Bottom Sheets centered on Desktop */
  .mobile-modal-overlay {
    align-items: center;
    justify-content: center;
    padding: 20px;
  }

  .mobile-bottom-sheet {
    max-width: 520px;
    border-radius: 28px;
    transform: translateY(20px) scale(0.96);
    opacity: 0;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
  }

  .mobile-modal-overlay.active .mobile-bottom-sheet {
    transform: translateY(0) scale(1);
    opacity: 1;
  }

  .sheet-handle {
    display: none;
  }

  /* Focus Lock Screen on Desktop */
  .focus-lock-container {
    max-width: 680px;
    margin: 20px auto;
    background: #FFFFFF;
    border-radius: 32px;
    border: 1px solid var(--app-border);
    padding: 36px 32px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  }

  /* Bottom Navigation floating pill */
  .mobile-bottom-nav {
    max-width: 480px;
    left: 50%;
    transform: translateX(-50%);
    bottom: 24px;
    border-radius: 9999px;
    border: 1px solid var(--app-border);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
  }
}

/* ============================================================
   ENHANCED LESSON MATERIALS & FILE PREVIEW STYLES
   ============================================================ */
.material-sheet-card {
  background: #FFFFFF;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-xl);
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.material-file-preview-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #F8FAFC;
  border: 1.5px solid #E2E8F0;
  border-radius: 16px;
  padding: 14px 16px;
  margin: 14px 0;
  transition: all 0.2s ease;
}

.material-file-preview-box:hover {
  border-color: #CBD5E1;
  background: #F1F5F9;
}

.file-icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.file-icon-badge.pdf {
  background: #FEE2E2;
  color: #DC2626;
  border: 1px solid #FECACA;
}

.file-icon-badge.word {
  background: #DBEAFE;
  color: #1D4ED8;
  border: 1px solid #BFDBFE;
}

.file-icon-badge.ppt {
  background: #FFEDD5;
  color: #EA580C;
  border: 1px solid #FED7AA;
}

.file-icon-badge.excel {
  background: #D1FAE5;
  color: #059669;
  border: 1px solid #A7F3D0;
}

.file-icon-badge.image {
  background: #EDE9FE;
  color: #7C3AED;
  border: 1px solid #DDD6FE;
}

.file-icon-badge.file {
  background: #E2E8F0;
  color: #475569;
  border: 1px solid #CBD5E1;
}

.material-file-meta {
  flex: 1;
  min-width: 0;
}

.material-file-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--app-dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.material-file-sub {
  font-size: 12px;
  color: var(--app-text-secondary);
  margin-top: 3px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.material-badge-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 9999px;
  text-transform: uppercase;
}

.material-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.material-action-btn-primary {
  background: var(--app-dark);
  color: #FFFFFF;
  border: none;
  border-radius: var(--app-radius-pill);
  padding: 13px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(17, 24, 39, 0.15);
}

.material-action-btn-primary:active {
  transform: scale(0.98);
}

.material-action-btn-lime {
  background: var(--app-lime);
  color: var(--app-dark);
  border: none;
  border-radius: var(--app-radius-pill);
  padding: 13px 18px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(212, 246, 55, 0.3);
}

.material-action-btn-lime:active {
  transform: scale(0.98);
}

.material-action-btn-outline {
  background: #FFFFFF;
  color: var(--app-dark);
  border: 1.5px solid var(--app-border);
  border-radius: var(--app-radius-pill);
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.material-action-btn-outline:active {
  transform: scale(0.98);
  background: #F8FAFC;
}

/* Document in-app fullscreen viewer modal */
.doc-viewer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.doc-viewer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.doc-viewer-header {
  height: 60px;
  background: #0F172A;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  color: #FFFFFF;
  flex-shrink: 0;
}

.doc-viewer-title {
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60%;
}

.doc-viewer-content {
  flex: 1;
  width: 100%;
  height: calc(100% - 60px);
  background: #0B0F19;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.doc-viewer-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #FFFFFF;
}

.doc-history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: #F8FAFC;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-md);
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.doc-history-item:hover {
  background: #F1F5F9;
  border-color: #CBD5E1;
}

.doc-history-item.active {
  background: #EFF6FF;
  border-color: #93C5FD;
}

/* ============================================================
   MODERN APP TOAST & PROFILE BAR STYLES
   ============================================================ */
.modern-app-toast {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #FFFFFF;
  padding: 8px 16px;
  border-radius: 9999px;
  font-family: var(--app-font);
  font-size: 12.5px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  z-index: 10000;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(212, 246, 55, 0.3);
  max-width: 88vw;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  animation: toastFadeIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--app-lime);
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--app-lime);
}

@keyframes toastFadeIn {
  from { opacity: 0; transform: translate(-50%, -12px) scale(0.96); }
  to { opacity: 1; transform: translate(-50%, 0) scale(1); }
}

.profile-top-bar button:active {
  transform: scale(0.96);
  background: var(--app-border-light);
}

.student-quiz-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  background: rgba(15, 23, 42, 0.65) !important;
  backdrop-filter: blur(8px) !important;
  -webkit-backdrop-filter: blur(8px) !important;
  z-index: 9999 !important;
  display: none;
  align-items: flex-end !important;
  justify-content: center !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: border-box !important;
}

.student-quiz-overlay.active {
  display: flex !important;
}

.student-quiz-overlay.hidden,
.student-quiz-overlay[style*="display: none"],
.student-quiz-overlay[style*="display:none"],
.student-quiz-overlay[style*="none"] {
  display: none !important;
  opacity: 0 !important;
  pointer-events: none !important;
  visibility: hidden !important;
}

.student-quiz-container {
  width: 100% !important;
  max-width: 440px !important;
  background: #FFFFFF !important;
  border-radius: 28px 28px 0 0 !important;
  padding: 22px 20px 32px !important;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.25) !important;
  border: 1px solid var(--app-border) !important;
  border-bottom: none !important;
  max-height: 85vh !important;
  overflow-y: auto !important;
  box-sizing: border-box !important;
  animation: slideUpQuizSheet 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

@keyframes slideUpQuizSheet {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@media (min-width: 768px) {
  .student-quiz-overlay {
    align-items: center !important;
    padding: 20px !important;
  }
  .student-quiz-container {
    border-radius: 28px !important;
    border-bottom: 1px solid var(--app-border) !important;
  }
}

.student-quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--app-border-light);
  padding-bottom: 12px;
}

.student-quiz-timer {
  background: #FEE2E2;
  color: #DC2626;
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.student-quiz-q {
  background: #F8FAFC;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-md);
  padding: 14px;
  margin-bottom: 12px;
}

.student-quiz-q-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--app-text-primary);
  margin-bottom: 10px;
}

.student-quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin-top: 8px;
  border-radius: var(--app-radius-sm);
  border: 1.5px solid var(--app-border);
  background: #FFFFFF;
  cursor: pointer;
  transition: all 0.15s ease;
}

.student-quiz-option:hover {
  border-color: #94A3B8;
}

/* ============================================================
   REFINED COMPACT PROFILE SCREEN STYLES
   ============================================================ */
.profile-screen-container {
  padding: 0 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.profile-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 4px;
}

.btn-profile-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--app-card);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-pill);
  padding: 7px 14px;
  font-family: var(--app-font);
  font-size: 13px;
  font-weight: 700;
  color: var(--app-text-primary);
  cursor: pointer;
  box-shadow: var(--app-shadow-xs);
  transition: background 0.15s ease;
}

.btn-profile-back:active {
  background: var(--app-border-light);
}

.profile-page-title {
  font-family: var(--app-font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--app-text-primary);
  letter-spacing: -0.3px;
}

/* Compact Profile Hero Card */
.profile-compact-hero {
  background: linear-gradient(135deg, #111827 0%, #161F30 100%);
  border-radius: 20px;
  padding: 16px 18px;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(17, 24, 39, 0.12);
  display: flex;
  align-items: center;
  gap: 14px;
}

.profile-compact-hero::after {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(212, 246, 55, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.profile-hero-avatar {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, #D4F637, #A3E635);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(212, 246, 55, 0.35);
}

.profile-hero-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.profile-hero-name-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.profile-hero-name {
  font-family: var(--app-font-display);
  font-size: 17px;
  font-weight: 800;
  color: #FFFFFF;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
  letter-spacing: -0.3px;
}

.profile-badge-pill {
  background: rgba(212, 246, 55, 0.22);
  color: #D4F637;
  font-size: 9px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: var(--app-radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  flex-shrink: 0;
}

.profile-hero-univ {
  font-size: 11.5px;
  color: #94A3B8;
  margin: 2px 0 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.profile-hero-chips {
  display: flex;
  gap: 8px;
  margin-top: 6px;
}

.profile-chip {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 10.5px;
  color: #CBD5E1;
  font-weight: 600;
}

.profile-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2px;
}

.profile-section-title {
  font-family: var(--app-font-display);
  font-size: 14.5px;
  font-weight: 800;
  color: var(--app-text-primary);
  letter-spacing: -0.2px;
}

.profile-version-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--app-text-muted);
}

/* Compact Action List Card */
.profile-actions-card {
  background: var(--app-card);
  border: 1px solid var(--app-border);
  border-radius: 18px;
  padding: 4px 6px;
  box-shadow: var(--app-shadow-xs);
  display: flex;
  flex-direction: column;
}

.profile-actions-card .action-row-item {
  padding: 10px 8px;
  gap: 11px;
  border-radius: 12px;
}

.profile-actions-card .action-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 11px;
}

.profile-actions-card .action-item-title {
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.profile-actions-card .action-item-subtitle {
  font-size: 11px;
  color: var(--app-text-secondary);
}

/* ============================================================
   REDESIGNED JOIN LESSON MODAL (RONAS IT MODERN SPEC)
   ============================================================ */
.join-student-profile-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #F8FAFC;
  border: 1px solid var(--app-border);
  border-radius: 18px;
  padding: 12px 14px;
  margin-bottom: 12px;
  box-shadow: var(--app-shadow-xs);
}

.join-avatar-box {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: #0F172A;
  color: #D4F637;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

.join-profile-info {
  flex: 1;
  min-width: 0;
}

.join-profile-name-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
}

.join-profile-name {
  font-size: 14.5px;
  font-weight: 800;
  color: var(--app-dark);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.join-verified-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: #ECFDF5;
  color: #059669;
  font-size: 10.5px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 9999px;
  border: 1px solid #A7F3D0;
  flex-shrink: 0;
}

.join-profile-sub {
  font-size: 12px;
  color: var(--app-text-muted);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.join-code-input {
  font-family: 'Space Grotesk', monospace;
  font-size: 24px !important;
  letter-spacing: 6px !important;
  text-align: center;
  font-weight: 800;
  padding: 14px 44px 14px 16px !important;
  color: var(--app-dark);
  background: #FFFFFF !important;
  border: 2px solid var(--app-border) !important;
  border-radius: 16px !important;
  transition: all 0.2s ease;
}

.join-code-input:focus {
  border-color: #0F172A !important;
  box-shadow: 0 0 0 3px rgba(212, 246, 55, 0.4) !important;
}

.join-code-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: #94A3B8;
  pointer-events: none;
}

.join-device-pill {
  background: #F8FAFC;
  border: 1px solid var(--app-border-light);
  border-radius: 14px;
  padding: 10px 14px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--app-text-secondary);
}

.mobile-btn-qr-scan {
  width: 100%;
  padding: 14px;
  border-radius: 14px;
  background: #F1F5F9;
  color: var(--app-dark);
  font-family: var(--app-font);
  font-size: 14px;
  font-weight: 700;
  border: 1px solid var(--app-border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 10px;
  transition: all 0.2s ease;
}

.mobile-btn-qr-scan:active {
  transform: scale(0.98);
  background: #E2E8F0;
}

.mobile-btn-cancel {
  width: 100%;
  padding: 12px;
  border-radius: 14px;
  background: transparent;
  color: var(--app-text-muted);
  font-family: var(--app-font);
  font-size: 13.5px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mobile-btn-cancel:active {
  background: rgba(0, 0, 0, 0.04);
}