/* --- Design System and Tokens --- */
:root {
  /* Font Families */
  --font-body: 'Outfit', 'Noto Sans TC', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-digital: 'Orbitron', monospace;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Shared Light Mode Theme Variables */
  --bg-primary: #f4f5f8;
  --bg-secondary: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --card-border: rgba(0, 0, 0, 0.06);
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.6);

  /* Component Colors */
  --accent-purple: #7c3aed;
  --accent-purple-hover: #6d28d9;
  --accent-purple-light: rgba(124, 58, 237, 0.1);
  
  --accent-gold: #eab308;
  --accent-gold-hover: #ca8a04;
  --accent-gold-light: rgba(234, 179, 8, 0.1);

  --accent-red: #ef4444;
  --accent-red-hover: #dc2626;
  --accent-red-light: rgba(239, 68, 68, 0.1);

  --accent-green: #10b981;
  --accent-green-hover: #059669;

  /* Gradients for Poll Chart Options */
  --grad-a: linear-gradient(135deg, #3b82f6, #06b6d4);
  --grad-b: linear-gradient(135deg, #a855f7, #ec4899);
  --grad-c: linear-gradient(135deg, #f97316, #eab308);
  --grad-d: linear-gradient(135deg, #10b981, #14b8a6);

  --bg-grid-color: rgba(0, 0, 0, 0.02);
  --bg-glow-color: rgba(124, 58, 237, 0.04);
}

/* Dark Theme Variables */
body.dark-theme {
  --bg-primary: #0a0816;
  --bg-secondary: #13112b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --card-border: rgba(255, 255, 255, 0.06);
  --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(255, 255, 255, 0.02);
  --glass-bg: rgba(19, 17, 43, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);

  --accent-purple: #9f66ff;
  --accent-purple-hover: #b687ff;
  --accent-purple-light: rgba(159, 102, 255, 0.15);

  --accent-gold: #f5c518;
  --accent-gold-hover: #ffd740;
  --accent-gold-light: rgba(245, 197, 24, 0.15);

  --accent-red: #ff5252;
  --accent-red-hover: #ff7373;
  --accent-red-light: rgba(255, 82, 82, 0.2);

  /* Gradients for Dark Mode Poll */
  --grad-a: linear-gradient(135deg, #00c6ff, #0072ff);
  --grad-b: linear-gradient(135deg, #f857a6, #ff5858);
  --grad-c: linear-gradient(135deg, #ffc500, #c21500);
  --grad-d: linear-gradient(135deg, #11998e, #38ef7d);

  --bg-grid-color: rgba(255, 255, 255, 0.015);
  --bg-glow-color: rgba(159, 102, 255, 0.08);
}

/* --- Base & Resets --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Background graphics */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(var(--bg-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -2;
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  top: -20%;
  left: 30%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, var(--bg-glow-color) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  filter: blur(50px);
  animation: glow-float 15s ease-in-out infinite alternate;
}

@keyframes glow-float {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(5%, 10%) scale(1.1); }
}

/* Confetti Canvas */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1000;
  pointer-events: none;
}

/* --- Layout & Typography --- */
.container {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

p {
  line-height: 1.6;
}

/* Cards (Glassmorphism design) */
.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  box-shadow: var(--card-shadow);
  padding: 2rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal);
}

/* --- Header & Tab Navigation --- */
header {
  background-color: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem 0.5rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.logo-icon {
  font-size: 2.2rem;
  animation: logo-bounce 2s ease-in-out infinite alternate;
}

@keyframes logo-bounce {
  0% { transform: translateY(0) rotate(0); }
  100% { transform: translateY(-4px) rotate(5deg); }
}

.logo h1 {
  font-size: 1.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-tabs {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  gap: 0.5rem;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  padding: 1rem 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 4px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent-purple);
  border-bottom-color: var(--accent-purple);
}

.tab-icon {
  transition: transform var(--transition-normal);
}

.tab-btn.active .tab-icon {
  transform: scale(1.1);
}

/* --- Theme Toggle Button --- */
.btn-icon {
  background-color: var(--accent-purple-light);
  border: 1px solid var(--glass-border);
  color: var(--accent-purple);
  padding: 0.75rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: transform var(--transition-bounce), background-color var(--transition-normal), color var(--transition-normal);
}

.btn-icon:hover {
  transform: scale(1.15) rotate(15deg);
  background-color: var(--accent-purple);
  color: #fff;
}

.btn-icon:active {
  transform: scale(0.95);
}

.sun-icon { display: none; }
.moon-icon { display: block; }
body.dark-theme .sun-icon { display: block; }
body.dark-theme .moon-icon { display: none; }


/* --- Tab Panel Visibility --- */
.tab-panel {
  display: none;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.tab-panel.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}


/* --- Buttons CSS System --- */
.btn {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 0.8rem 1.6rem;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform var(--transition-bounce), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background-color: var(--accent-purple);
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(124, 58, 237, 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-purple-hover);
  box-shadow: 0 10px 24px rgba(124, 58, 237, 0.35);
}

.btn-secondary {
  background-color: var(--accent-purple-light);
  color: var(--accent-purple);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background-color: var(--accent-purple);
  color: #ffffff;
}

.btn-danger {
  background-color: var(--accent-red-light);
  color: var(--accent-red);
}

.btn-danger:hover {
  background-color: var(--accent-red);
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(239, 68, 68, 0.25);
}

.btn-large {
  font-size: 1.2rem;
  padding: 1rem 2rem;
  border-radius: 14px;
}

.btn-giant {
  font-size: 1.8rem;
  padding: 1.4rem 3rem;
  border-radius: 18px;
  box-shadow: 0 12px 30px rgba(124, 58, 237, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent-purple);
  color: var(--accent-purple);
}

.btn-outline:hover {
  background-color: var(--accent-purple);
  color: #ffffff;
}


/* --- TOOL 1: Random Name Picker --- */
.panel-layout {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 1.5rem;
  align-items: stretch;
}

.panel-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.helper-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

textarea {
  width: 100%;
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.05rem;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

textarea:focus {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px var(--accent-purple-light);
}

.option-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.option-label {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

/* Toggle Switch Style */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--text-secondary);
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent-purple);
}

input:focus + .slider {
  box-shadow: 0 0 1px var(--accent-purple);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

.sidebar-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.status-info {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px dashed var(--card-border);
}

.badge {
  background-color: var(--accent-purple-light);
  color: var(--accent-purple);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-family: var(--font-digital);
  font-weight: 700;
}

/* Roulette / Slot Machine Style UI */
.picker-main-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 500px;
  background-image: radial-gradient(circle at center, var(--accent-purple-light) 0%, transparent 70%);
}

.picker-display {
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
}

.slot-container {
  width: 100%;
  position: relative;
}

/* Slot Viewport Window */
.slot-window {
  width: 100%;
  height: 300px;
  border: 4px solid var(--accent-purple);
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(159, 102, 255, 0.2);
}

body.dark-theme .slot-window {
  background-color: rgba(0, 0, 0, 0.4);
}

/* Marker pointers in the center */
.slot-marker {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 100px;
  transform: translateY(-50%);
  border-top: 2px dashed var(--accent-gold);
  border-bottom: 2px dashed var(--accent-gold);
  background-color: rgba(245, 197, 24, 0.05);
  pointer-events: none;
  z-index: 10;
  box-shadow: 0 0 15px rgba(245, 197, 24, 0.1);
}

.slot-marker::before,
.slot-marker::after {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  z-index: 11;
}

.slot-marker::before {
  left: 10px;
  border-left: 16px solid var(--accent-gold);
}

.slot-marker::after {
  right: 10px;
  border-right: 16px solid var(--accent-gold);
}

/* Moving ribbon of names */
.slot-strip {
  display: flex;
  flex-direction: column;
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
  transform: translateY(0);
}

/* Name card in slot machine */
.slot-item {
  height: 100px;
  line-height: 100px;
  text-align: center;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 40px;
  transition: transform var(--transition-fast);
}

.slot-item.initial-text {
  font-size: 2.2rem;
  color: var(--text-secondary);
}

/* --- TOOL 2: Countdown Timer --- */
.timer-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3.5rem;
  min-height: 600px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.timer-display-wrapper {
  position: relative;
  width: 420px;
  height: 420px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.progress-ring {
  transform: rotate(-90deg);
  position: absolute;
  top: 0;
  left: 0;
}

.progress-ring-bar {
  transition: stroke-dashoffset 0.1s linear, stroke var(--transition-normal);
}

.timer-readout {
  font-family: var(--font-digital);
  font-size: 7rem;
  font-weight: 900;
  color: var(--text-primary);
  z-index: 10;
  letter-spacing: -2px;
  transition: color var(--transition-normal), transform var(--transition-fast);
}

/* Giant warning state for timer */
.timer-layout.warning .timer-readout {
  color: var(--accent-red);
  animation: timer-shake 0.5s infinite alternate, timer-glow 1s infinite alternate;
}

.timer-layout.warning .progress-ring-bar {
  stroke: var(--accent-red) !important;
}

.timer-layout.warning {
  box-shadow: 0 0 50px rgba(239, 68, 68, 0.15), var(--card-shadow);
  border-color: rgba(239, 68, 68, 0.3);
  animation: timer-bg-pulse 1s infinite alternate;
}

@keyframes timer-shake {
  0% { transform: scale(1.02) rotate(-0.5deg); }
  100% { transform: scale(1.02) rotate(0.5deg); }
}

@keyframes timer-glow {
  0% { text-shadow: 0 0 15px rgba(239, 68, 68, 0.4); }
  100% { text-shadow: 0 0 35px rgba(239, 68, 68, 0.7); }
}

@keyframes timer-bg-pulse {
  0% { background-color: var(--bg-secondary); }
  100% { background-color: rgba(239, 68, 68, 0.05); }
}

/* Timer Setup Controls */
.timer-controls {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  align-items: center;
}

.control-group h3 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.preset-buttons, .adjust-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn-preset {
  background-color: var(--accent-purple-light);
  color: var(--accent-purple);
  min-width: 110px;
  font-size: 1.1rem;
}

.btn-preset:hover {
  background-color: var(--accent-purple);
  color: #fff;
}

.btn-adjust {
  min-width: 100px;
}

.timer-actions {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 1rem;
}


/* --- TOOL 3: Instant Poll --- */
.poll-layout {
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.8rem;
}

.form-group label {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.form-group input[type="text"] {
  width: 100%;
  padding: 1rem 1.2rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.1rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input[type="text"]:focus {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px var(--accent-purple-light);
}

.options-input-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.option-input-wrapper {
  display: flex;
  align-items: center;
  background-color: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.option-input-wrapper:focus-within {
  border-color: var(--accent-purple);
}

.option-badge {
  padding: 1rem 1.4rem;
  font-weight: 900;
  color: #fff;
  font-size: 1.2rem;
  text-align: center;
  min-width: 60px;
}

.option-badge.opt-a { background: var(--grad-a); }
.option-badge.opt-b { background: var(--grad-b); }
.option-badge.opt-c { background: var(--grad-c); }
.option-badge.opt-d { background: var(--grad-d); }

.option-input-wrapper input {
  border: none;
  background: transparent;
  flex: 1;
  padding: 1rem;
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text-primary);
  outline: none;
}

.poll-setup-buttons {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

/* Active Poll Styling */
.active-poll-card {
  min-height: 550px;
  display: flex;
  flex-direction: column;
}

.poll-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px dashed var(--card-border);
  margin-bottom: 2rem;
}

.poll-live-indicator {
  background-color: var(--accent-red-light);
  color: var(--accent-red);
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.4rem 1rem;
  border-radius: 30px;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: pulse-opacity 1.5s infinite alternate;
}

.poll-live-indicator::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--accent-red);
  border-radius: 50%;
}

@keyframes pulse-opacity {
  0% { opacity: 0.6; }
  100% { opacity: 1; }
}

.poll-actions-top {
  display: flex;
  gap: 0.8rem;
}

.poll-question-display {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.poll-key-tip {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
}

.poll-interactive-area {
  display: grid;
  grid-template-columns: 1.1fr 1.2fr;
  gap: 3rem;
  flex: 1;
}

/* Voting Buttons Layout */
.poll-voting-buttons {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.btn-vote {
  border: 1px solid var(--card-border);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border-radius: 16px;
  padding: 1.2rem 1.8rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  text-align: left;
  transition: transform var(--transition-bounce), box-shadow var(--transition-fast), background-color var(--transition-normal), border-color var(--transition-normal);
  width: 100%;
}

.btn-vote:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

body.dark-theme .btn-vote:hover {
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.vote-key {
  display: inline-block;
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-family: var(--font-digital);
  font-size: 1.1rem;
  font-weight: 700;
  min-width: 50px;
  height: 50px;
  line-height: 48px;
  border-radius: 12px;
  text-align: center;
  transition: background-color var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal);
}

.vote-text {
  font-size: 1.4rem;
  font-weight: 700;
  flex: 1;
}

/* Button Individual Colors Hover and Focus state */
.btn-vote.opt-a-btn:hover { border-color: #3b82f6; background-color: rgba(59, 130, 246, 0.05); }
.btn-vote.opt-b-btn:hover { border-color: #ec4899; background-color: rgba(236, 72, 153, 0.05); }
.btn-vote.opt-c-btn:hover { border-color: #f97316; background-color: rgba(249, 115, 22, 0.05); }
.btn-vote.opt-d-btn:hover { border-color: #10b981; background-color: rgba(16, 185, 129, 0.05); }

.btn-vote.opt-a-btn:hover .vote-key { color: #fff; background: var(--grad-a); border: none; }
.btn-vote.opt-b-btn:hover .vote-key { color: #fff; background: var(--grad-b); border: none; }
.btn-vote.opt-c-btn:hover .vote-key { color: #fff; background: var(--grad-c); border: none; }
.btn-vote.opt-d-btn:hover .vote-key { color: #fff; background: var(--grad-d); border: none; }

/* Vote Button Click Micro-animation */
.btn-vote.clicked {
  animation: button-pop 0.3s var(--transition-bounce);
}

@keyframes button-pop {
  0% { transform: scale(1); }
  50% { transform: scale(0.92); }
  100% { transform: scale(1); }
}

/* Charts Column */
.poll-results-chart {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  justify-content: center;
  border-left: 1px solid var(--card-border);
  padding-left: 2.5rem;
}

.chart-row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.chart-row-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  font-size: 1.15rem;
  font-weight: 700;
}

.chart-label {
  color: var(--text-primary);
  max-width: 70%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chart-value {
  color: var(--text-secondary);
}

.vote-count-num {
  font-family: var(--font-digital);
  font-size: 1.3rem;
  color: var(--text-primary);
}

.progress-bar-bg {
  height: 24px;
  background-color: var(--bg-primary);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--card-border);
}

.progress-bar-fill {
  height: 100%;
  border-radius: 12px;
  width: 0%;
  transition: width 0.6s cubic-bezier(0.1, 0.8, 0.2, 1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.fill-a { background: var(--grad-a); }
.fill-b { background: var(--grad-b); }
.fill-c { background: var(--grad-c); }
.fill-d { background: var(--grad-d); }

.chart-summary {
  font-size: 1.2rem;
  font-weight: 700;
  text-align: right;
  margin-top: 1.5rem;
  color: var(--text-secondary);
  border-top: 1px dashed var(--card-border);
  padding-top: 1.2rem;
}

.chart-summary strong {
  font-family: var(--font-digital);
  font-size: 1.6rem;
  color: var(--accent-purple);
}


/* --- Modal Overlay for Draw Winner --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1100;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal-content {
  width: 90%;
  max-width: 550px;
  text-align: center;
  transform: scale(0.85);
  opacity: 0;
  transition: transform var(--transition-bounce), opacity var(--transition-normal);
  padding: 3rem 2rem;
  border: 4px solid var(--accent-gold);
  background-image: radial-gradient(circle at center, var(--accent-gold-light) 0%, var(--bg-secondary) 80%);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
  opacity: 1;
}

.modal-header {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent-gold);
  letter-spacing: 4px;
  text-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
  animation: pulse-scale 1s infinite alternate;
}

@keyframes pulse-scale {
  0% { transform: scale(1); }
  100% { transform: scale(1.05); }
}

.modal-body {
  margin-bottom: 2.5rem;
}

#winner-name-display {
  font-size: 4.8rem;
  font-weight: 900;
  color: var(--text-primary);
  text-shadow: 0 0 20px rgba(245, 197, 24, 0.4);
  word-break: break-word;
  animation: text-pop 0.5s var(--transition-bounce);
}

@keyframes text-pop {
  0% { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.modal-footer {
  display: flex;
  justify-content: center;
}


/* --- Responsive Adjustments --- */
@media (max-width: 992px) {
  .panel-layout {
    grid-template-columns: 1fr;
  }
  
  .poll-interactive-area {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .poll-results-chart {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--card-border);
    padding-top: 2rem;
  }
}

@media (max-width: 600px) {
  h2 { font-size: 1.5rem; }
  .header-container h1 { font-size: 1.4rem; }
  .tab-btn { padding: 0.8rem 1rem; font-size: 0.95rem; }
  
  .slot-window { height: 240px; }
  .slot-marker { height: 80px; }
  .slot-item { height: 80px; line-height: 80px; font-size: 2rem; }
  
  .timer-display-wrapper {
    width: 320px;
    height: 320px;
  }
  .progress-ring {
    width: 320px;
    height: 320px;
  }
  .progress-ring circle {
    r: 140;
    cx: 160;
    cy: 160;
  }
  .progress-ring-bg { stroke-width: 10; }
  .progress-ring-bar {
    stroke-width: 12;
    stroke-dasharray: 879.6; /* 2 * PI * 140 */
  }
  .timer-readout { font-size: 5rem; }
  
  .options-input-list { grid-template-columns: 1fr; }
  .poll-question-display { font-size: 1.8rem; }
  #winner-name-display { font-size: 3.5rem; }
}

/* --- Poll QR Code section --- */
.poll-qr-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 1.5rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: inset 0 0 15px rgba(255, 255, 255, 0.01);
}

.poll-qr-card {
  width: 140px;
  height: 140px;
  background-color: #fff;
  border-radius: 12px;
  padding: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

.poll-qr-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-placeholder {
  color: #333;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
}

.poll-qr-info {
  text-align: left;
  flex: 1;
}

.poll-qr-info h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-gold);
  margin-bottom: 0.4rem;
}

.qr-subtext {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.8rem;
}

.poll-url-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 0.75rem 1.2rem;
  display: inline-block;
  max-width: 100%;
  word-break: break-all;
}

.poll-url-box a {
  color: var(--accent-purple);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
}

.poll-url-box a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .poll-qr-container {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem;
  }
  .poll-qr-info {
    text-align: center;
  }
}

/* --- Teacher Login Overlay Screen --- */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  padding: 1.5rem;
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 3rem 2.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  animation: login-card-fade-in 0.5s var(--transition-bounce);
  border: 1px solid var(--card-border);
}

@keyframes login-card-fade-in {
  0% { transform: scale(0.9) translateY(20px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}

.login-logo {
  font-size: 3.5rem;
  margin-bottom: 0.5rem;
  animation: logo-bounce 2s ease-in-out infinite alternate;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

.login-form-group {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  text-align: left;
  margin-bottom: 1.2rem;
}

.login-form-group input {
  width: 100%;
  padding: 1rem 1.2rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.1rem;
  outline: none;
  text-align: center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-form-group input:focus {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px var(--accent-purple-light);
}

.login-error {
  color: var(--accent-red);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  padding: 0.5rem;
  background-color: var(--accent-red-light);
  border-radius: 8px;
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.login-submit-btn {
  width: 100%;
}

.login-footer-tip {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.login-footer-tip code {
  background-color: var(--accent-purple-light);
  color: var(--accent-purple);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

/* Logout button specific styling */
#btn-logout {
  padding: 0.6rem 1.2rem;
  font-size: 0.95rem;
  border-radius: 10px;
}