/* ==========================================================================
   數位事件調查局 設計系統 (Bold Typography Style Edition)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Colors (Dark Mode Only - Bold Typography) */
  --bg-main: #0A0A0A;        /* Near-black, not pure black */
  --bg-card: #0F0F0F;        /* Slight elevation */
  --bg-muted: #1A1A1A;       /* Subtle surface */
  --text-main: #FAFAFA;      /* Warm white */
  --text-muted: #737373;     /* Muted foreground */
  --border-color: #262626;   /* Barely-there dividers */
  
  /* Accent System - Vermillion */
  --color-primary: #FF3D00;   /* Accent */
  --color-primary-glow: rgba(255, 61, 0, 0.15);
  --color-accent: #FF3D00;    /* Vermillion */
  --color-accent-glow: rgba(255, 61, 0, 0.15);
  --color-success: #10B981;   /* Green success */
  --color-warning: #FF3D00;   /* Same as accent for strictness */
  
  /* Typography */
  --font-title: 'Inter Tight', system-ui, sans-serif;
  --font-body: 'Inter', "Microsoft JhengHei", sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Boundaries & Radii (Strictly 0px rounded corners) */
  --radius-lg: 0px;
  --radius-md: 0px;
  --radius-sm: 0px;
  --transition: all 150ms cubic-bezier(0.25, 0, 0, 1);
}

/* ==========================================================================
   全域基本設定 & Noise Texture
   ========================================================================== */

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Subtle Noise Grain Texture */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  opacity: 0.015;
  z-index: 9999;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

header.app-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-main);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-title);
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-decoration: none;
  color: var(--text-main);
  text-transform: uppercase;
}

.logo span {
  color: var(--text-main);
}

.logo b {
  color: var(--color-accent);
  margin-left: 0.25rem;
}

.header-status {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.badge {
  background-color: transparent;
  padding: 0.35rem 0.85rem;
  border-radius: 0px; /* Sharp corners */
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.badge.primary {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.badge.accent {
  color: var(--text-main);
  border-color: var(--text-main);
}

/* ==========================================================================
   通用版面
   ========================================================================== */

main.app-content {
  flex: 1;
  padding: 3rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.container-sm {
  max-width: 500px;
  margin: 4rem auto;
  width: 100%;
}

/* ==========================================================================
   卡片與面板 (Strict Minimal Borders)
   ========================================================================== */

.card {
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: 0px; /* No rounded corners */
  padding: 2.5rem;
  margin-bottom: 2rem;
  transition: var(--transition);
  position: relative;
}

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

.card-title {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-main);
  text-transform: uppercase;
}

/* ==========================================================================
   按鈕與輸入框
   ========================================================================== */

.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Minimal Box Input */
.form-control {
  width: 100%;
  height: 3.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  border-radius: 0px;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
}

textarea.form-control {
  height: auto;
  resize: vertical;
}

/* Bold Typography Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-title);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 0px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  gap: 0.5rem;
  width: 100%;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  padding: 1rem 0;
  background: transparent;
  color: var(--color-accent);
}

/* Primary Button: Text-only with animated underline */
.btn-primary, .btn-accent {
  background: transparent !important;
  color: var(--color-accent) !important;
}

.btn-primary::after, .btn-accent::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(1);
  transform-origin: bottom left;
  transition: transform 150ms cubic-bezier(0.25, 0, 0, 1);
}

.btn-primary:hover::after, .btn-accent:hover::after {
  transform: scaleX(1.1);
}

.btn-primary:active, .btn-accent:active {
  transform: translateY(1px);
}

/* Secondary Button: Outline Inversion */
.btn-secondary {
  border: 1px solid var(--text-main) !important;
  color: var(--text-main) !important;
  padding: 1rem 1.5rem !important;
}

.btn-secondary:hover {
  background-color: var(--text-main) !important;
  color: var(--bg-main) !important;
}

.btn-secondary:active {
  transform: translateY(1px);
}

/* Danger Button: Red Outline Inversion */
.btn-danger {
  border: 1px solid var(--color-accent) !important;
  color: var(--color-accent) !important;
  padding: 1rem 1.5rem !important;
}

.btn-danger:hover {
  background-color: var(--color-accent) !important;
  color: var(--bg-main) !important;
}

.btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

/* ==========================================================================
   選項框與複選單 (Option Grids)
   ========================================================================== */

.option-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.option-card {
  border: 1px solid var(--border-color);
  background-color: transparent;
  border-radius: 0px;
  padding: 1rem 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

.option-card:hover {
  border-color: var(--color-accent);
}

.option-card.selected, .option-card.accent-selected {
  border-color: var(--color-accent);
  background-color: var(--bg-muted);
}

.option-card input[type="radio"],
.option-card input[type="checkbox"] {
  accent-color: var(--color-accent);
  width: 18px;
  height: 18px;
}

.option-text {
  font-size: 1rem;
  font-weight: 500;
}

/* ==========================================================================
   頁面專屬元件
   ========================================================================== */

.stage-panel {
  display: none;
}

.stage-panel.active {
  display: block;
}

/* 進度條 (Flat Solid Accent) */
.progress-bar-container {
  width: 100%;
  height: 3px;
  background-color: var(--border-color);
  border-radius: 0px;
  overflow: hidden;
  margin-bottom: 2rem;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-accent);
  width: 0%;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 情境方塊 */
.scenario-box {
  background: var(--bg-muted);
  border-left: 2px solid var(--color-accent);
  padding: 1.75rem;
  border-radius: 0px;
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 2rem;
}

/* 作答狀態表格 (座號顯示) */
.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
  gap: 0.5rem;
  margin-top: 1rem;
}

.student-dot {
  background-color: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  height: 36px;
  border-radius: 0px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.student-dot.joined {
  border-color: var(--text-main);
  color: var(--text-main);
}

.student-dot.submitted {
  background-color: var(--bg-muted);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* 雙次投票統計長條圖 */
.chart-container {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.chart-bar-label {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.chart-bar-track {
  width: 100%;
  height: 32px;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  border-radius: 0px;
  overflow: hidden;
  position: relative;
}

.chart-bar-fill {
  height: 100%;
  background-color: var(--color-accent);
  width: 0%;
  transition: width 0.6s cubic-bezier(0.25, 0, 0, 1);
}

.chart-bar-fill.second {
  background-color: var(--text-main);
  opacity: 0.85;
}

.chart-bar-value {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-main);
  mix-blend-mode: difference;
}

/* 審核理由區 */
.reason-card {
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: 0px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.reason-card.approved {
  border-color: var(--color-success);
}

.reason-card.rejected {
  border-color: var(--color-accent);
  opacity: 0.35;
}

.reason-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-icon {
  width: 32px;
  height: 32px;
  border-radius: 0px;
  border: 1px solid var(--border-color);
  background-color: transparent;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition);
}

.btn-icon:hover {
  border-color: var(--text-main);
}

.btn-icon.approve:hover {
  border-color: var(--color-success);
  color: var(--color-success);
}

.btn-icon.reject:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ==========================================================================
   定錨彈跳視窗 (Bold Structural Dialog)
   ========================================================================== */

dialog.modal {
  background-color: var(--bg-main);
  border: 2px solid var(--color-accent);
  border-radius: 0px;
  padding: 2.5rem;
  color: var(--text-main);
  max-width: 650px;
  width: 90%;
  margin: auto;
  outline: none;
  box-shadow: none;
}

dialog.modal::backdrop {
  background-color: rgba(10, 10, 10, 0.95);
}

.modal-header {
  font-family: var(--font-title);
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-transform: uppercase;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.75rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--color-accent);
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.modal-section h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.modal-section p {
  font-size: 1.05rem;
  color: var(--text-main);
}

/* 滾動彈出氣泡理由 (用於投影端) */
.projector-reasons-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.projector-reason-bubble {
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: 0px;
  padding: 1.25rem 1.5rem;
  font-size: 1.2rem;
  font-weight: 600;
  animation: slideInUp 0.4s cubic-bezier(0.25, 0, 0, 1) forwards;
}

@keyframes slideInUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ==========================================================================
   課本漫畫情境樣式
   ========================================================================== */
.comic-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 23%;
  max-width: 185px;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  border-radius: 0px;
  padding: 0.75rem;
  transition: var(--transition);
}

.comic-card:hover {
  border-color: var(--color-accent);
}

.comic-card img {
  width: 100%;
  height: auto;
  border-radius: 0px;
  border: 1px solid var(--border-color);
}

.comic-caption {
  font-size: 0.8rem;
  color: var(--text-main);
  text-align: center;
  margin-top: 0.75rem;
  line-height: 1.5;
  white-space: pre-line;
  font-weight: 600;
  width: 100%;
}

#caseIllustrationImg {
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

#caseIllustrationImg:hover {
  border-color: var(--color-accent);
}

/* Helper Utilities for Bold Style */
.text-gradient {
  color: var(--color-accent);
}

.font-mono {
  font-family: var(--font-mono) !important;
}

/* ==========================================================================
   投影端特有排版
   ========================================================================== */

.projector-layout {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 3rem;
  margin-top: 2rem;
}

/* 教師端歷次歸檔表格 */
.history-section {
  margin-top: 3rem;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.history-table th,
.history-table td {
  padding: 1rem 0.75rem;
  text-align: left;
}

.history-table th {
  border-bottom: 2px solid var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.history-table tr {
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.history-table tr:hover {
  background-color: var(--bg-muted);
}

/* ==========================================================================
   教師端導覽欄按鈕對齊
   ========================================================================== */

.teacher-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
}

.stage-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stage-btn {
  text-align: left;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: 0px;
  background-color: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stage-btn:hover {
  border-color: var(--text-main);
  color: var(--text-main);
}

.stage-btn.active {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--bg-muted);
}

.stage-btn b {
  font-size: 0.85rem;
}

/* ==========================================================================
   掃描動畫元件 & Unified Footer
   ========================================================================== */

/* Cyber Grid Scanner Waiting Animation */
.scanner-container {
  position: relative;
  width: 160px;
  height: 160px;
  margin: 2.5rem auto;
  border: 1px solid var(--border-color);
  background: var(--bg-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.scanner-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
  animation: scan 2.5s cubic-bezier(0.25, 0, 0, 1) infinite;
}

.scanner-grid {
  width: 85%;
  height: 85%;
  border: 1px dashed var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  animation: pulse-glow 1.5s ease-in-out infinite alternate;
}

.scanner-status {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

@keyframes scan {
  0% { transform: translateY(0); }
  50% { transform: translateY(158px); }
  100% { transform: translateY(0); }
}

@keyframes pulse-glow {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

/* Unified Navigation Footer */
.app-footer {
  margin-top: auto;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  background-color: var(--bg-main);
  z-index: 10;
}

.footer-links {
  display: inline-flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: var(--transition);
  position: relative;
  padding-bottom: 4px;
}

.footer-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: bottom left;
  transition: transform 150ms cubic-bezier(0.25, 0, 0, 1);
}

.footer-link:hover {
  color: var(--text-main);
}

.footer-link:hover::after {
  transform: scaleX(1);
}

.footer-sep {
  font-family: var(--font-mono);
  color: var(--border-color);
  font-size: 0.85rem;
  user-select: none;
}