/* ==========================================================================
   141 HQ — Professional YouTube & Netflix Dark Theme System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200');

.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 18px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  vertical-align: middle;
}

:root {
  /* Canvas & Surfaces: YouTube & Netflix Dark Palette */
  --bg-dark: #0f0f0f;
  --bg-panel: #161616;
  --bg-card: #1f1f1f;
  --bg-card-hover: #272727;
  --bg-input: #121212;
  --bg-input-focus: #1c1c1c;

  /* YouTube & Netflix Signature Red Brand Accents */
  --brand-50: #fef2f2;
  --brand-100: #fee2e2;
  --brand-400: #f87171;
  --brand-500: #e50914;
  --brand-600: #dc2626;
  --brand-700: #b91c1c;
  --yt-red: #ff0000;
  --netflix-red: #e50914;

  /* Neutrals: High Contrast Precision Grays */
  --zinc-100: #f4f4f5;
  --zinc-200: #e4e4e7;
  --zinc-300: #d4d4d8;
  --zinc-400: #aaaaaa;
  --zinc-500: #71717a;
  --zinc-600: #52525b;
  --zinc-700: #3f3f46;
  --zinc-800: #27272a;
  --zinc-900: #18181b;
  --zinc-950: #0f0f0f;

  /* Borders */
  --border-light: rgba(255, 255, 255, 0.08);
  --border-subtle: #272727;
  --border-focus: #e50914;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Transition */
  --transition: 0.15s ease;
}

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

html {
  background-color: #0f0f0f !important;
  color-scheme: dark !important;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: #f4f4f5;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  animation: hqDeflash 0.18s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes hqDeflash {
  0% {
    opacity: 0.88;
  }
  100% {
    opacity: 1;
  }
}

/* ==========================================================================
   YouTube-Style Top Loading Bar
   ========================================================================== */
#yt-top-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: #ff0000;
  z-index: 1000000;
  pointer-events: none;
  opacity: 0;
  transition: width 0.2s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
  box-shadow: 0 0 10px rgba(255, 0, 0, 0.7), 0 0 4px #ff0000;
}

#yt-top-loader.active {
  opacity: 1;
}

.yt-loader-peg {
  display: block;
  position: absolute;
  right: 0;
  width: 100px;
  height: 100%;
  box-shadow: 0 0 10px #ff0000, 0 0 5px #ff0000;
  opacity: 1.0;
  transform: rotate(3deg) translate(0px, -4px);
}

/* Strict Logo Sizing - Flat, Crisp & Non-stretching */
.sidebar-logo,
img.sidebar-logo {
  width: 32px !important;
  height: 32px !important;
  min-width: 32px !important;
  min-height: 32px !important;
  max-width: 32px !important;
  max-height: 32px !important;
  border-radius: 4px !important;
  display: block !important;
  object-fit: contain !important;
  box-shadow: none !important;
  flex-shrink: 0 !important;
}

.mobile-topbar-logo,
img.mobile-topbar-logo {
  width: 26px !important;
  height: 26px !important;
  min-width: 26px !important;
  min-height: 26px !important;
  max-width: 26px !important;
  max-height: 26px !important;
  border-radius: 4px !important;
  display: block !important;
  object-fit: contain !important;
  background: transparent !important;
  padding: 0 !important;
  box-shadow: none !important;
  flex-shrink: 0 !important;
}

.brand-icon {
  width: 32px !important;
  height: 32px !important;
  min-width: 32px !important;
  min-height: 32px !important;
  border-radius: 4px !important;
  overflow: hidden !important;
  box-shadow: none !important;
  flex-shrink: 0 !important;
}

.brand-icon img {
  width: 32px !important;
  height: 32px !important;
  display: block !important;
  object-fit: contain !important;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: #333333;
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: #555555;
}

/* Zero Decorative Background Gimmicks */
.ambient-backdrop,
.blob {
  display: none !important;
}

/* Flat Panel Surfaces */
.glass-panel {
  background: var(--bg-panel);
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: none !important;
}

/* Professional Action Buttons (YouTube / Netflix Aesthetics) */
.btn-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--brand-500);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: background-color var(--transition), opacity var(--transition);
  text-decoration: none;
  box-shadow: none !important;
}

.btn-brand:hover {
  background-color: var(--brand-600);
  box-shadow: none !important;
  transform: none !important;
}

.btn-brand:active {
  background-color: var(--brand-700);
  transform: none !important;
}

.btn-subtle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--zinc-300);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-subtle:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

/* Button Loading & Feedback Animations */
.btn-brand:disabled,
.btn-subtle:disabled,
button:disabled {
  opacity: 0.55 !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
}

.is-loading,
.btn-loading,
button.is-loading,
.btn-brand.is-loading,
.btn-subtle.is-loading {
  position: relative !important;
  color: transparent !important;
  pointer-events: none !important;
  cursor: not-allowed !important;
  user-select: none !important;
  text-shadow: none !important;
}

.is-loading > *,
.btn-loading > *,
button.is-loading > *,
.btn-brand.is-loading > *,
.btn-subtle.is-loading > * {
  visibility: hidden !important;
  opacity: 0 !important;
}

.is-loading::after,
.btn-loading::after,
button.is-loading::after,
.btn-brand.is-loading::after,
.btn-subtle.is-loading::after {
  content: '' !important;
  visibility: visible !important;
  opacity: 1 !important;
  position: absolute !important;
  width: 16px !important;
  height: 16px !important;
  top: calc(50% - 8px) !important;
  left: calc(50% - 8px) !important;
  border: 2px solid rgba(255, 255, 255, 0.25) !important;
  border-top-color: #ffffff !important;
  border-radius: 50% !important;
  animation: hqBtnSpinner 0.65s linear infinite !important;
  box-sizing: border-box !important;
  z-index: 10 !important;
}

@keyframes hqBtnSpinner {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Universal View, Modal & Card Fading Transitions */
.view-section,
.view-panel,
.tab-content,
.auth-form,
.modal-backdrop,
.qjs-modal-backdrop,
.card,
.glass-panel {
  transition: opacity 0.18s cubic-bezier(0.16, 1, 0.3, 1), transform 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in {
  animation: hqFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes hqFadeIn {
  0% {
    opacity: 0.85;
    transform: translateY(2px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Form Inputs */
.form-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: #ffffff;
  transition: border-color var(--transition), background-color var(--transition);
}

.form-input:focus {
  background: var(--bg-input-focus);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 1px var(--border-focus);
  outline: none;
}

.form-input::placeholder {
  color: #666666;
}

select.form-input,
select {
  background-color: #1a1a1a !important;
  color: #f4f4f5 !important;
  color-scheme: dark !important;
}

select.form-input option,
select option {
  background-color: #1a1a1a !important;
  color: #f4f4f5 !important;
  padding: 8px 10px !important;
}

select.form-input option:hover,
select option:checked {
  background-color: #2a2a2a !important;
  color: #ffffff !important;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

/* Role Specific Badges (Strictly Admin, Student, Faculty) */
.badge-admin {
  background: rgba(168, 85, 247, 0.15) !important;
  color: #c084fc !important;
  border: 1px solid rgba(168, 85, 247, 0.38) !important;
  font-weight: 700 !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-student {
  background: rgba(59, 130, 246, 0.14) !important;
  color: #60a5fa !important;
  border: 1px solid rgba(59, 130, 246, 0.35) !important;
  font-weight: 600 !important;
}

.badge-faculty {
  background: rgba(20, 184, 166, 0.14) !important;
  color: #2dd4bf !important;
  border: 1px solid rgba(20, 184, 166, 0.35) !important;
  font-weight: 600 !important;
}

.badge-brand,
.badge-red {
  background: rgba(229, 9, 20, 0.15);
  color: #f87171;
  border: 1px solid rgba(229, 9, 20, 0.35);
}

.badge-teal,
.badge-emerald {
  background: rgba(34, 197, 94, 0.12);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge-zinc {
  background: rgba(255, 255, 255, 0.06);
  color: var(--zinc-400);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Toast Notifications */
.hq-toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: #181818;
  border: 1px solid #333333;
  color: #ffffff;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
  z-index: 99999;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateY(-100%);
  opacity: 0;
  transition: all 0.25s ease;
  max-width: 380px;
}

.hq-toast.show {
  transform: translateY(0);
  opacity: 1;
}

.hq-toast.toast-success {
  border-color: rgba(34, 197, 94, 0.5);
}

.hq-toast.toast-error {
  border-color: rgba(229, 9, 20, 0.6);
}