/* ==========================================
   DESIGN SYSTEM - PREMIUM NEO-BRUTALISM (QUIZ.COM STYLE)
   ========================================== */

:root {
  --bg-color: #fbf9f4;
  --bg-pattern: #ebdcc3;
  --panel-bg: #ffffff;
  --panel-border: #0f0f1b;
  
  --text-primary: #0f0f1b;
  --text-secondary: #374151;
  --text-muted: #6b7280;
  
  --primary-color: #8b5cf6;       /* Vibrant Purple */
  --primary-hover: #7c3aed;
  --primary-glow: rgba(139, 92, 246, 0.25);
  
  --secondary-color: #facc15;     /* Yellow */
  --secondary-hover: #eab308;
  
  --emerald: #10b981;
  --emerald-glow: rgba(16, 185, 129, 0.25);
  
  --rose: #f43f5e;
  --rose-glow: rgba(244, 63, 94, 0.25);
  
  --cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.25);
  
  --purple: #a855f7;
  --purple-glow: rgba(168, 85, 247, 0.25);

  --orange: #f97316;
  --orange-glow: rgba(249, 115, 22, 0.25);
  
  --border-width: 3px;
  --card-shadow: 6px 6px 0px #0f0f1b;
  --btn-shadow: 4px 4px 0px #0f0f1b;
  --btn-shadow-sm: 2px 2px 0px #0f0f1b;
  --input-shadow: 2px 2px 0px rgba(15, 15, 27, 0.1);
}

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

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-color);
  background-image: radial-gradient(var(--bg-pattern) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Glowing Animated Background (removed or adapted to flat design) */
.glow-bg {
  display: none; /* Neo-brutalism relies on solid colors and grid patterns */
}

/* Glassmorphism adaptation to Brutalism card */
.glass {
  background: var(--panel-bg);
  border: var(--border-width) solid var(--panel-border);
  box-shadow: var(--card-shadow);
  border-radius: 16px;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-left: 2px solid var(--panel-border);
}
::-webkit-scrollbar-thumb {
  background: var(--panel-border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Typography helper */
.text-glow {
  text-shadow: none;
  font-weight: 800;
}

/* Buttons */
.btn {
  font-family: inherit;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 8px;
  border: var(--border-width) solid var(--panel-border);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  box-shadow: var(--btn-shadow);
  color: var(--text-primary);
}

.btn-primary {
  background: var(--primary-color);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--panel-border);
}
.btn-primary:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px var(--panel-border);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-primary);
}
.btn-secondary:hover {
  background: #f9f9fb;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--panel-border);
}
.btn-secondary:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px var(--panel-border);
}

.btn-danger {
  background: var(--rose);
  color: #fff;
}
.btn-danger:hover {
  background: #e11d48;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--panel-border);
}
.btn-danger:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px var(--panel-border);
}

.btn-block {
  display: flex;
  width: 100%;
}
.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 6px;
  border-width: 2px;
  box-shadow: var(--btn-shadow-sm);
}
.btn-sm:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--panel-border);
}
.btn-sm:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px var(--panel-border);
}

/* Inputs & Form Groups */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.form-group label i {
  margin-right: 4px;
}
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 12px 16px;
  background: #ffffff;
  border: var(--border-width) solid var(--panel-border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: var(--input-shadow);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 3px 3px 0px var(--panel-border);
  background: #ffffff;
}
.form-group select option {
  background-color: #ffffff;
  color: var(--text-primary);
}
.form-row {
  display: flex;
  gap: 16px;
}
.col-6 {
  flex: 1;
}
.input-help {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 6px;
  font-weight: 500;
}

/* ==========================================
   AUTHENTICATION UI
   ========================================== */
.auth-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 40px 30px;
  background: #ffffff;
  border: var(--border-width) solid var(--panel-border);
  box-shadow: var(--card-shadow);
  border-radius: 16px;
  animation: scaleUp 0.3s ease;
}
.auth-header {
  text-align: center;
  margin-bottom: 30px;
}
.logo-icon {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: var(--primary-color);
  border: var(--border-width) solid var(--panel-border);
  color: white;
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px auto;
  box-shadow: var(--btn-shadow);
}
.auth-header h1 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.auth-header p {
  font-size: 13px;
  color: var(--text-secondary);
}
.auth-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: var(--text-secondary);
}
.auth-footer a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 700;
  margin-left: 4px;
}
.auth-footer a:hover {
  text-decoration: underline;
}

/* ==========================================
   DASHBOARD UI LAYOUT
   ========================================== */
.dashboard-wrapper {
  display: flex;
  height: 100vh;
  padding: 16px;
  gap: 16px;
  max-width: 1600px;
  margin: 0 auto;
}

/* Sidebar */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: #ffffff;
  border: var(--border-width) solid var(--panel-border);
  box-shadow: var(--card-shadow);
  border-radius: 16px;
  overflow-y: auto;
}
.sidebar-header {
  margin-bottom: 32px;
}
.sidebar-header .logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.sidebar-header .logo i {
  color: var(--primary-color);
}
.user-badge {
  background: #f3e8ff;
  border: 2px solid var(--panel-border);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
  box-shadow: var(--btn-shadow-sm);
}
.user-badge::before {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald);
  border: 1px solid var(--panel-border);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  transition: all 0.15s ease;
  border: 2px solid transparent;
}
.nav-item:hover {
  background: var(--bg-color);
  border: 2px solid var(--panel-border);
}
.nav-item.active {
  color: #fff;
  background: var(--primary-color);
  border: 2px solid var(--panel-border);
  box-shadow: var(--btn-shadow-sm);
}
.nav-item.logout {
  margin-top: auto;
}
.nav-item.logout:hover {
  color: #fff;
  background: var(--rose);
  border: 2px solid var(--panel-border);
  box-shadow: var(--btn-shadow-sm);
}

/* Content Area */
.content-area {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}
.content-header {
  padding: 10px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}
.content-header h2 {
  font-size: 22px;
  font-weight: 900;
  color: var(--text-primary);
}
.system-status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  background: #ffffff;
  padding: 8px 16px;
  border-radius: 20px;
  border: 2px solid var(--panel-border);
  box-shadow: var(--btn-shadow-sm);
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
}
.dot.green {
  background: var(--emerald);
  box-shadow: none;
}

/* Tab panes */
.tab-pane {
  display: none;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  padding: 8px 24px 24px 24px;
  flex-grow: 1;
}
.tab-pane.active {
  display: flex;
}

/* CARDS */
.card {
  background: var(--panel-bg);
  border: var(--border-width) solid var(--panel-border);
  box-shadow: var(--card-shadow);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.card-header {
  border-bottom: 2px solid var(--panel-border);
  padding-bottom: 12px;
}
.card-header h3 {
  font-size: 18px;
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}
.card-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.metric-card {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.metric-icon {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  border: var(--border-width) solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: var(--btn-shadow-sm);
}
.green-glow {
  background: var(--emerald);
  color: #fff;
}
.cyan-glow {
  background: var(--cyan);
  color: #fff;
}
.purple-glow {
  background: var(--purple);
  color: #fff;
}
.metric-info h3 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.metric-info .value {
  font-size: 24px;
  font-weight: 900;
  color: var(--text-primary);
}

.welcome-card {
  padding: 28px;
  background: var(--secondary-color);
  color: var(--text-primary);
}
.welcome-text h2 {
  font-size: 24px;
  font-weight: 900;
  margin-bottom: 8px;
}
.username-highlight {
  color: var(--primary-color);
}
.welcome-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  font-weight: 500;
}

.instructions-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 16px;
}
.instruction-card ol {
  padding-left: 20px;
}
.instruction-card li {
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  font-weight: 500;
}
.code-block {
  margin-top: 8px;
  background: #0f1026;
  padding: 12px;
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--cyan);
  border: 2px solid var(--panel-border);
  overflow-x: auto;
}
.link-glow {
  color: var(--primary-color);
  text-decoration: underline;
  font-weight: 700;
}

/* Zalo Status Badges */
.status-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  display: inline-block;
  border: 2px solid var(--panel-border);
  box-shadow: 2px 2px 0px var(--panel-border);
}
.status-success {
  background: #d1fae5;
  color: #065f46;
}
.status-error {
  background: #ffe4e6;
  color: #9f1239;
}
.status-warning {
  background: #fef3c7;
  color: #92400e;
}

/* ==========================================
   SCHEDULES TAB UI
   ========================================== */
.schedules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}
.schedule-card {
  background: #ffffff;
  border: var(--border-width) solid var(--panel-border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--btn-shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.schedule-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--panel-border);
}
.schedule-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.schedule-time {
  font-size: 20px;
  font-weight: 900;
  color: var(--primary-color);
}
.schedule-days-badge {
  background: #f3e8ff;
  border: 1px solid var(--panel-border);
  color: var(--primary-color);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
}
.schedule-body {
  flex-grow: 1;
}
.schedule-msg {
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: 12px;
  font-weight: 500;
  background: var(--bg-color);
  border: 2px solid var(--panel-border);
  padding: 8px 12px;
  border-radius: 8px;
}
.schedule-meta {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-weight: 600;
}
.schedule-meta span i {
  width: 16px;
  color: var(--primary-color);
}
.schedule-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 2px solid var(--panel-border);
  padding-top: 12px;
}
.schedule-btns {
  display: flex;
  gap: 8px;
}

/* Toggle Switch Brutalism style */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 22px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ffffff;
  transition: .3s;
  border-radius: 24px;
  border: 2px solid var(--panel-border);
}
.slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 3px;
  bottom: 3px;
  background-color: var(--panel-border);
  transition: .3s;
  border-radius: 50%;
}
input:checked + .slider {
  background-color: var(--emerald);
}
input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #ffffff;
}

/* Tables */
.table-card {
  padding: 0;
  overflow: hidden;
  border-radius: 12px;
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}
.data-table th {
  background: var(--secondary-color);
  color: var(--text-primary);
  font-weight: 900;
  padding: 14px 18px;
  border-bottom: var(--border-width) solid var(--panel-border);
  border-right: 2px solid var(--panel-border);
}
.data-table th:last-child {
  border-right: none;
}
.data-table td {
  padding: 14px 18px;
  border-bottom: 2px solid var(--panel-border);
  border-right: 2px solid var(--panel-border);
  color: var(--text-primary);
  font-weight: 500;
  background: #ffffff;
}
.data-table td:last-child {
  border-right: none;
}
.data-table tr:last-child td {
  border-bottom: none;
}
.data-table tr:nth-child(even) td {
  background: var(--bg-color);
}

/* ==========================================
   CONSOLE LOGS TAB UI
   ========================================== */
.log-card {
  padding: 0;
  overflow: hidden;
}
.log-viewport {
  background: #0f1026;
  border-top: 2px solid var(--panel-border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 20px;
  height: 480px;
  overflow-y: auto;
  flex-grow: 1;
}
.log-line {
  margin-bottom: 4px;
  white-space: pre-wrap;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
  padding-bottom: 2px;
}
.log-line.info { color: #a5b4fc; }
.log-line.warning { color: #f59e0b; }
.log-line.error, .log-line.critical { color: #f43f5e; font-weight: 700; }

/* MODALS */
.modal-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 16, 38, 0.6);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}
.modal-content {
  width: 100%;
  max-width: 580px;
  padding: 30px;
  background: #ffffff;
  border: var(--border-width) solid var(--panel-border);
  box-shadow: var(--card-shadow);
  border-radius: 16px;
  animation: scaleUp 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--panel-border);
  padding-bottom: 12px;
  margin-bottom: 20px;
}
.modal-header h3 {
  font-size: 20px;
  font-weight: 900;
  color: var(--text-primary);
}
.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  transition: color 0.15s;
}
.close-btn:hover {
  color: var(--text-primary);
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
  border-top: 2px solid var(--panel-border);
  padding-top: 16px;
}

/* Day Checkboxes */
.days-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.checkbox-container {
  position: relative;
  padding-left: 28px;
  cursor: pointer;
  font-size: 13px;
  user-select: none;
  display: inline-flex;
  align-items: center;
  height: 24px;
  color: var(--text-primary);
  font-weight: 700;
}
.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}
.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 20px;
  width: 20px;
  background-color: #ffffff;
  border: 2px solid var(--panel-border);
  border-radius: 6px;
  transition: all 0.15s;
}
.checkbox-container:hover input ~ .checkmark {
  background-color: #f3efe6;
}
.checkbox-container input:checked ~ .checkmark {
  background-color: var(--primary-color);
}
.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}
.checkbox-container input:checked ~ .checkmark:after {
  display: block;
}
.checkbox-container .checkmark:after {
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* TOASTS */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  background: #ffffff;
  border: var(--border-width) solid var(--panel-border);
  padding: 12px 20px;
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--btn-shadow);
  animation: slideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), fadeOut 0.3s ease 3s forwards;
  min-width: 250px;
}
.toast.success {
  border-color: var(--emerald);
}
.toast.success i { color: var(--emerald); }
.toast.error {
  border-color: var(--rose);
}
.toast.error i { color: var(--rose); }

/* Common Utilities */
.hidden { display: none !important; }
.text-center { text-align: center; }
.placeholder-text {
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  padding: 20px;
  font-weight: 600;
}

/* ANIMATIONS */
@keyframes pulseAnim {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}
@keyframes scaleUp {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; pointer-events: none; }
}

/* ADMIN & QR CUSTOM STYLES */
.badge-role {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 20px;
  display: inline-block;
  border: 2px solid var(--panel-border);
  box-shadow: 1px 1px 0px var(--panel-border);
}
.badge-role-admin {
  background: #f3e8ff;
  color: var(--purple);
}
.badge-role-user {
  background: var(--bg-color);
  color: var(--text-secondary);
}
.qr-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 3px solid var(--panel-border);
  box-shadow: var(--btn-shadow-sm);
  margin-bottom: 12px;
}