/* ==========================================================================
   Liquid Glass UI & Modern Clean Design System (方案 B: 清透液态毛玻璃)
   ========================================================================== */

:root {
  /* 基础色彩 */
  --ink: #192823;
  --ink-secondary: #4a5c54;
  --muted: #6b7e75;
  --paper: #f4f7f4;
  --white: #ffffff;

  /* 品牌与主交互色 (Emerald Glass) */
  --brand: #1f7a63;
  --brand-hover: #16634f;
  --brand-light: #e5f3ed;
  --brand-glow: rgba(31, 122, 99, 0.25);

  /* 状态色彩 */
  --status-ok: #15803d;
  --status-ok-bg: #dcfce7;
  --status-ok-border: #86efac;
  --status-warn: #b45309;
  --status-warn-bg: #fef3c7;
  --status-warn-border: #fde68a;
  --status-bad: #b91c1c;
  --status-bad-bg: #fee2e2;
  --status-bad-border: #fca5a5;
  --status-info: #0369a1;
  --status-info-bg: #e0f2fe;

  /* 液态玻璃物理光学 Tokens */
  --glass-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.78) 0%, rgba(255, 255, 255, 0.52) 100%);
  --glass-bg-hover: linear-gradient(135deg, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.65) 100%);
  --glass-card-subtle: rgba(255, 255, 255, 0.45);
  --glass-border: rgba(255, 255, 255, 0.75);
  --glass-border-subtle: rgba(210, 222, 215, 0.55);
  --glass-specular: inset 0 1.5px 0.5px rgba(255, 255, 255, 0.95), inset 0 -1px 0.5px rgba(0, 0, 0, 0.02);
  --glass-shadow: 0 12px 32px -8px rgba(32, 51, 47, 0.07), 0 4px 12px -2px rgba(32, 51, 47, 0.04);
  --glass-shadow-hover: 0 18px 40px -8px rgba(31, 122, 99, 0.14), 0 6px 16px -2px rgba(31, 122, 99, 0.06);

  /* 缓动动效 */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局重置与基础设置 */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--paper);
  color: var(--ink);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

/* 动态背景光晕环境 (Ambient Glow Canvas) */
.ambient-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.65;
  will-change: transform;
  animation: floatOrb 22s infinite alternate ease-in-out;
}

.orb-emerald {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(31, 122, 99, 0.16) 0%, rgba(31, 122, 99, 0) 70%);
  top: -120px;
  left: 10%;
}

.orb-blue {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.14) 0%, rgba(56, 189, 248, 0) 70%);
  bottom: -150px;
  right: 5%;
  animation-duration: 28s;
  animation-delay: -7s;
}

.orb-gold {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.10) 0%, rgba(245, 158, 11, 0) 70%);
  top: 40%;
  right: 25%;
  animation-duration: 24s;
  animation-delay: -12s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, 40px) scale(1.08); }
  100% { transform: translate(-20px, 20px) scale(0.95); }
}

[hidden] {
  display: none !important;
}

/* 排版与公用类 */
h1, h2, h3, h4, p {
  margin-top: 0;
}

h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
  color: var(--ink);
}

h2 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

h3 {
  font-size: 14px;
  font-weight: 600;
}

.muted {
  color: var(--muted);
  font-size: 12px;
}

.eyebrow {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--brand);
  font-weight: 700;
  margin-bottom: 6px;
  display: inline-block;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--glass-border-subtle);
  color: var(--ink-secondary);
}

.chip.ok {
  background: var(--status-ok-bg);
  border-color: var(--status-ok-border);
  color: var(--status-ok);
}

.chip.warn {
  background: var(--status-warn-bg);
  border-color: var(--status-warn-border);
  color: var(--status-warn);
}

.chip.bad {
  background: var(--status-bad-bg);
  border-color: var(--status-bad-border);
  color: var(--status-bad);
}

/* 按钮规范 */
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 10px;
  padding: 9px 18px;
  transition: all 0.2s var(--ease-smooth);
  outline-offset: 2px;
  border: 1px solid transparent;
}

button:active {
  transform: scale(0.98);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  filter: grayscale(40%);
  transform: none !important;
}

.primary {
  background: linear-gradient(135deg, #248d73 0%, var(--brand) 100%);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 14px rgba(31, 122, 99, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #2ba687 0%, var(--brand-hover) 100%);
  box-shadow: 0 6px 18px rgba(31, 122, 99, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
}

.secondary {
  background: rgba(255, 255, 255, 0.75);
  color: var(--brand);
  border-color: var(--glass-border);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04), inset 0 1px 0 #fff;
  backdrop-filter: blur(10px);
}

.secondary:hover:not(:disabled) {
  background: #ffffff;
  color: var(--brand-hover);
  border-color: rgba(31, 122, 99, 0.3);
  box-shadow: 0 4px 12px rgba(31, 122, 99, 0.12), inset 0 1px 0 #fff;
}

.quiet {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  padding: 6px 12px;
  font-size: 12px;
}

.quiet:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.65);
  color: var(--ink);
  border-color: var(--glass-border-subtle);
}

.danger {
  background: rgba(255, 255, 255, 0.85);
  color: var(--status-bad);
  border-color: rgba(220, 38, 38, 0.25);
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.08);
}

.danger:hover:not(:disabled) {
  background: var(--status-bad-bg);
  border-color: var(--status-bad);
  color: #991b1b;
}

.danger-text {
  color: var(--status-bad) !important;
}

.danger-text:hover {
  background: var(--status-bad-bg) !important;
}

button.small {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 8px;
}

/* 输入控件 */
input:not([type=checkbox]), select {
  display: block;
  width: 100%;
  border: 1px solid rgba(195, 209, 202, 0.6);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.75);
  padding: 10px 14px;
  color: var(--ink);
  font-size: 13px;
  margin-top: 6px;
  box-shadow: inset 0 1.5px 3px rgba(0, 0, 0, 0.03);
  backdrop-filter: blur(10px);
  transition: all 0.2s ease;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--brand);
  background: #ffffff;
  box-shadow: 0 0 0 3px var(--brand-glow), inset 0 1px 2px rgba(0, 0, 0, 0.02);
}

label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-secondary);
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  color: var(--ink-secondary);
}

input[type=checkbox] {
  appearance: none;
  -webkit-appearance: none;
  width: 17px;
  height: 17px;
  border: 1.5px solid rgba(150, 168, 160, 0.6);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.85);
  cursor: pointer;
  display: grid;
  place-content: center;
  transition: all 0.15s ease;
  margin: 0;
}

input[type=checkbox]:checked {
  background: var(--brand);
  border-color: var(--brand);
  box-shadow: 0 2px 6px rgba(31, 122, 99, 0.35);
}

input[type=checkbox]:checked::before {
  content: "";
  width: 9px;
  height: 5px;
  border-left: 2px solid white;
  border-bottom: 2px solid white;
  transform: rotate(-45deg) translate(1px, -1px);
}

input[type=checkbox]:focus {
  outline: 2px solid var(--brand-glow);
}

/* 呼吸指示灯 */
.live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
  margin-right: 6px;
  flex-shrink: 0;
  transition: background 0.3s;
}

.live-dot.busy {
  background: #f59e0b;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.25);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2); }
  50% { box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.35); }
}

/* 认证卡片 (Auth Screen) */
.auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  position: relative;
  z-index: 1;
}

.auth-card {
  max-width: 440px;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  border-radius: 24px;
  padding: 42px 36px;
  text-align: left;
}

.auth-card .brand-icon {
  margin-bottom: 20px;
  box-shadow: 0 6px 16px rgba(31, 122, 99, 0.3);
}

.auth-card h1 {
  font-size: 24px;
  margin-bottom: 6px;
}

.auth-card label {
  margin-top: 22px;
}

.auth-card button {
  width: 100%;
  margin-top: 24px;
  padding: 12px;
  font-size: 14px;
}

.auth-card small {
  display: block;
  margin-top: 18px;
  font-size: 11px;
  text-align: center;
  color: var(--muted);
}

.error {
  font-size: 12px;
  color: var(--status-bad);
  margin-top: 10px;
  font-weight: 500;
}

/* 统一玻璃面板 */
.panel {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  border-radius: 18px;
}

/* 工作空间主体架构 */
#workspace {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* 侧边浮岛玻璃导航 (Floating Glass Sidebar) */
aside {
  position: fixed;
  inset: 16px auto 16px 16px;
  width: 230px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  border-radius: 20px;
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  z-index: 20;
}

.brand {
  display: flex;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  align-items: center;
}

.brand small {
  display: block;
  font-size: 9px;
  letter-spacing: 1.5px;
  color: var(--muted);
  margin-top: 2px;
}

.brand-icon {
  background: linear-gradient(135deg, #2bb291 0%, var(--brand) 100%);
  color: #fff;
  border-radius: 12px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(31, 122, 99, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.nav-label {
  margin: 36px 8px 10px;
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  text-decoration: none;
  border-radius: 12px;
  color: var(--ink-secondary);
  margin-bottom: 6px;
  font-weight: 500;
  transition: all 0.2s var(--ease-smooth);
  border: 1px solid transparent;
}

.nav:hover {
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  border-color: var(--glass-border-subtle);
}

.nav.active {
  background: var(--brand-light);
  color: var(--brand);
  font-weight: 600;
  border-color: rgba(31, 122, 99, 0.2);
  box-shadow: 0 2px 8px rgba(31, 122, 99, 0.08);
}

.aside-note {
  margin-top: auto;
  font-size: 12px;
  padding: 16px 10px 0;
  border-top: 1px solid rgba(210, 222, 215, 0.5);
}

.aside-note p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.aside-status {
  display: flex;
  align-items: center;
  margin-bottom: 6px;
}

#asideActive {
  font-weight: 600;
}

/* 主内容区域 */
main {
  margin-left: 262px;
  flex: 1;
  max-width: 1400px;
  padding: 16px 36px 40px;
  min-width: 0;
}

/* 顶部晶莹状态栏 */
header {
  height: 64px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px -2px rgba(32, 51, 47, 0.04), var(--glass-specular);
  border-radius: 16px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.breadcrumb {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb span {
  color: #a4b3ac;
}

/* 通知条 */
#notice {
  background: var(--status-warn-bg);
  border: 1px solid var(--status-warn-border);
  color: var(--status-warn);
  border-radius: 12px;
  padding: 12px 18px;
  margin-bottom: 20px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.1);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideDown 0.3s var(--ease-spring);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 页面头部区 */
.intro {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  gap: 20px;
}

.status-pill {
  font-size: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  border-radius: 999px;
  padding: 8px 16px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
  margin-bottom: 8px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  border: 1px solid var(--glass-border-subtle);
  transition: all 0.2s;
}

.back:hover {
  background: #ffffff;
  color: var(--brand-hover);
  transform: translateX(-2px);
}

.account-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* 账号网格与卡片 (Mac-like Widget Cards) */
.account-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.account-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  border-radius: 20px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 180px;
  color: var(--ink);
  text-decoration: none;
  transition: all 0.25s var(--ease-spring);
  position: relative;
  overflow: hidden;
}

.account-card:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(31, 122, 99, 0.35);
  box-shadow: var(--glass-shadow-hover), var(--glass-specular);
  transform: translateY(-3px);
}

.account-link {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 16px;
  color: inherit;
  text-decoration: none;
}

.card-delete {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 26px;
  height: 26px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  font-size: 15px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0.55;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
}

.card-delete:hover,
.card-delete:focus-visible {
  opacity: 1;
  color: #b23b36;
  background: #fff;
}

.account-head {
  display: flex;
  gap: 14px;
  align-items: center;
}

.avatar {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, #d8eee3 0%, #bde2cf 100%);
  color: var(--brand);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 10px rgba(31, 122, 99, 0.12);
}

.account-head h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.account-head p {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.account-status {
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-secondary);
  background: rgba(255, 255, 255, 0.55);
  padding: 6px 12px;
  border-radius: 10px;
  border: 1px solid var(--glass-border-subtle);
}

.account-status.error {
  color: var(--status-bad);
  background: var(--status-bad-bg);
  border-color: var(--status-bad-border);
}

.account-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.account-add {
  border: 2px dashed rgba(162, 185, 175, 0.5);
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(10px);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--brand);
  font-weight: 600;
  text-align: center;
  gap: 8px;
  padding: 30px;
}

.account-add:hover {
  background: rgba(255, 255, 255, 0.65);
  border-color: var(--brand);
  transform: translateY(-2px);
}

.account-add .plus {
  font-size: 32px;
  line-height: 1;
  font-weight: 300;
}

/* 课程区域与头部 */
.course-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 24px 0 14px;
}

.course-tools {
  display: flex;
  align-items: center;
  gap: 16px;
}

.count {
  font-size: 12px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.7);
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--glass-border-subtle);
  margin-left: 6px;
}

/* 课程卡片列表 (Compact Crystal List) */
.course-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 480px;
  overflow-y: auto;
  padding: 10px;
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.02);
  border-radius: 16px;
  scrollbar-gutter: stable;
}

.course-card {
  display: grid;
  grid-template-columns: 28px minmax(0, 1.2fr) minmax(200px, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  row-gap: 4px;
  align-items: center;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.course-card:hover {
  background: #ffffff;
  border-color: rgba(31, 122, 99, 0.3);
  box-shadow: 0 4px 14px rgba(31, 122, 99, 0.08);
  transform: translateX(2px);
}

.course-card.selected {
  background: #f1f8f4;
  border-color: #83c6b2;
  box-shadow: 0 4px 14px rgba(31, 122, 99, 0.12), inset 3px 0 0 var(--brand);
}

.card-top {
  grid-column: 1;
  grid-row: 1 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
}

.course-card h3 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-meta {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 11px;
  color: var(--muted);
}

.course-progress {
  grid-column: 3;
  grid-row: 1 / 3;
  margin: 0;
  min-width: 0;
}

.progress-text {
  font-size: 11px;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.progress-track {
  height: 6px;
  background: rgba(210, 222, 215, 0.45);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  background: linear-gradient(90deg, #34b393 0%, var(--brand) 100%);
  height: 100%;
  width: 0;
  border-radius: 999px;
  transition: width 0.4s var(--ease-smooth);
}

.chapter {
  font-size: 11px;
  color: var(--ink-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin: 5px 0 0;
}

.message {
  font-size: 11px;
  color: var(--status-warn);
  margin: 3px 0 0;
  font-weight: 500;
}

.state-failed { color: var(--status-bad) !important; font-weight: 600; }
.state-completed { color: var(--status-ok) !important; font-weight: 600; }
.state-running { color: var(--brand) !important; font-weight: 600; }
.state-blocked, .state-needs_input { color: var(--status-warn) !important; font-weight: 600; }

.empty {
  text-align: center;
  padding: 48px 24px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 14px;
  border: 1px dashed var(--glass-border-subtle);
}

.empty-icon {
  font-size: 32px;
  color: #8da68c;
  margin-bottom: 8px;
}

/* 任务栏悬浮控制台 (Floating Taskbar Capsule) */
.taskbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  margin-top: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  border-radius: 18px;
}

.task-options {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.task-options label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  white-space: nowrap;
}

.task-options select {
  margin: 0;
  width: auto;
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 8px;
}

.task-options p {
  font-size: 11px;
  margin: 0 0 0 10px;
  color: var(--ink-secondary);
  line-height: 1.5;
}

.task-options p span {
  color: var(--muted);
}

.task-buttons {
  display: flex;
  gap: 10px;
  white-space: nowrap;
}

/* 运行监控视图 (Run Monitor View) */
.run-hint {
  font-size: 11px;
  color: var(--muted);
}

.run-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.run-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  border-radius: 18px;
  padding: 22px;
  display: flex;
  flex-direction: column;
}

.run-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.run-head h3 {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
}

.run-state {
  flex: none;
  font-size: 11px;
  font-weight: 600;
  border-radius: 999px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--glass-border-subtle);
  color: var(--ink-secondary);
}

.run-state.state-running {
  background: var(--brand-light);
  border-color: rgba(31, 122, 99, 0.3);
  color: var(--brand);
}

.run-state.state-needs_input, .run-state.state-blocked {
  background: var(--status-warn-bg);
  border-color: var(--status-warn-border);
  color: var(--status-warn);
}

.run-state.state-failed {
  background: var(--status-bad-bg);
  border-color: var(--status-bad-border);
  color: var(--status-bad);
}

.run-state.state-completed {
  background: var(--status-ok-bg);
  border-color: var(--status-ok-border);
  color: var(--status-ok);
}

.run-card .course-meta {
  margin: 6px 0 12px;
}

.run-meter {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
}

.run-percent {
  font-size: 32px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--brand);
}

.run-fraction {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.run-card .progress-track {
  height: 8px;
  margin: 10px 0 8px;
}

.run-card .chapter {
  white-space: normal;
  font-size: 12px;
  color: var(--ink-secondary);
  line-height: 1.5;
}

/* 媒体播放卡片 (音视频胶囊) */
.media-progress {
  margin-top: 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.8);
}

.media-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
}

.media-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.media-heading strong {
  flex: none;
  color: var(--brand);
  font-size: 14px;
}

.media-progress .progress-track {
  height: 8px;
  margin: 10px 0 8px;
  background: rgba(210, 222, 215, 0.6);
}

.media-progress .progress-fill {
  transition: width 1s linear;
}

.media-details {
  font-size: 11px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
}

/* 终端深透琉璃运行日志 (Activity & Log Terminal) */
.activity {
  margin-top: 24px;
  padding: 22px;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.section-title > div {
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title > .log-tools {
  gap: 14px;
}

.run-options-message {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
}

.step {
  font-size: 10px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-light);
  padding: 3px 8px;
  border-radius: 6px;
  letter-spacing: 0.5px;
}

/* 日志窗口本体 */
#logs {
  height: 260px;
  overflow-y: auto;
  margin-top: 16px;
  background: rgba(18, 30, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 14px 16px;
  font: 12px/1.8 "JetBrains Mono", Consolas, "Courier New", monospace;
  color: #e5ede8;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4);
}

.log-row {
  display: grid;
  grid-template-columns: 68px 58px 1fr;
  gap: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  padding: 2px 0;
}

.log-time {
  color: #7b8e84;
}

.log-level {
  color: #4ade80;
  font-weight: 600;
}

.log-row.ERROR .log-level {
  color: #f87171;
}

.log-row.WARNING .log-level {
  color: #fbbf24;
}

.log-placeholder {
  color: #748c80;
  text-align: center;
  padding: 40px 0;
}

/* 题库设置视图 (Settings View) */
.tiku-settings {
  padding: 24px;
}

.settings-hint {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.7;
  margin: 6px 0 16px;
}

.submit-hint {
  margin-top: 12px;
  color: var(--brand);
  font-weight: 500;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px 20px;
}

.answer-policy {
  margin: 24px 0;
  padding: 22px;
  border: 1px solid rgba(31, 122, 99, 0.2);
  border-radius: 16px;
  background: rgba(235, 245, 240, 0.65);
}

.policy-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.policy-heading h3 {
  margin: 0;
  font-size: 15px;
}

.policy-note {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.6;
  margin: 10px 0 0;
}

.provider-fields {
  margin: 20px 0;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
}

.provider-fields h3 {
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.provider-fields h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 14px;
  background: var(--brand);
  border-radius: 2px;
}

.settings-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--glass-border-subtle);
}

/* 密钥安全包裹条与清除胶囊 (Secret Wrap UI) */
.secret-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(32, 51, 47, 0.03), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.secret-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-weight: 500;
  color: var(--status-ok);
}

.secret-badge::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 2.5px rgba(16, 185, 129, 0.2);
}

.clear-secret-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  color: #dc2626;
  background: rgba(254, 242, 242, 0.95);
  border: 1px solid rgba(252, 165, 165, 0.65);
  border-radius: 8px;
  padding: 4px 11px;
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
  box-shadow: 0 1px 3px rgba(220, 38, 38, 0.06);
}

.clear-secret-btn::before {
  content: "✕";
  font-size: 10px;
  font-weight: 700;
}

.clear-secret-btn:hover {
  background: #fee2e2;
  border-color: #ef4444;
  color: #b91c1c;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.16);
  transform: translateY(-1px);
}

.clear-secret-btn:active {
  transform: scale(0.97);
}

.clear-secret {
  display: inline-block;
  margin-top: 6px;
  font-size: 11px;
  color: #b91c1c;
  cursor: pointer;
}

/* 模态弹窗 (Dialog & Modals) */
dialog {
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 0;
  width: min(460px, 92vw);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  box-shadow: 0 24px 64px -12px rgba(18, 38, 30, 0.25), var(--glass-specular);
  color: var(--ink);
  animation: modalIn 0.25s var(--ease-spring);
}

dialog::backdrop {
  background: rgba(20, 35, 30, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

#accountForm {
  padding: 32px;
}

#accountForm h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

#qrDialog {
  width: min(380px, 92vw);
}

.qr-panel {
  padding: 28px 28px 24px;
  text-align: center;
}

.qr-panel h2 {
  font-size: 18px;
  margin-bottom: 6px;
}

.qr-panel .muted {
  font-size: 12px;
  line-height: 1.6;
  margin: 0 0 16px;
}

.qr-frame {
  display: flex;
  justify-content: center;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--glass-border);
  border-radius: 16px;
}

#qrImage {
  display: block;
  width: 200px;
  height: 200px;
  object-fit: contain;
}

#qrImage:not([src]) {
  visibility: hidden;
}

.qr-status {
  min-height: 20px;
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--ink-secondary);
}

#qrDialog .dialog-buttons {
  justify-content: center;
}

.dialog-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 26px;
}

/* 自定义确认模态框 (Confirm Dialog) */
#confirmDialog {
  width: min(420px, 92vw);
  border-radius: 22px;
  overflow: hidden;
}

#confirmDialog[open] {
  animation: confirmPop 0.22s var(--ease-spring);
}

@keyframes confirmPop {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.confirm-panel {
  padding: 26px 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.confirm-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.confirm-head h2 {
  font-size: 18px;
  margin: 0;
  color: var(--ink);
  line-height: 1.3;
}

.confirm-head .muted {
  font-size: 12px;
  margin: 3px 0 0;
  color: var(--muted);
}

.confirm-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.confirm-icon.danger {
  background: linear-gradient(135deg, rgba(254, 226, 226, 0.95) 0%, rgba(254, 202, 202, 0.7) 100%);
  color: #b91c1c;
  border: 1px solid rgba(239, 68, 68, 0.25);
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.12);
}

.confirm-target {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid var(--glass-border-subtle);
  border-radius: 14px;
}

.confirm-target .avatar {
  width: 38px;
  height: 38px;
  font-size: 14px;
}

.confirm-target-info h4 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.confirm-target-info p {
  margin: 2px 0 0;
  font-size: 12px;
}

.confirm-message {
  margin: 0;
  font-size: 14px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.5;
}

.confirm-detail {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: #7f1d1d;
  background: rgba(254, 242, 242, 0.85);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 12px;
  padding: 10px 13px;
}

.confirm-buttons {
  margin-top: 8px;
}

.danger-solid {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%) !important;
  color: #ffffff !important;
  border: 1px solid rgba(185, 28, 28, 0.8) !important;
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.3) !important;
  font-weight: 600;
}

.danger-solid:hover:not(:disabled) {
  background: linear-gradient(135deg, #b91c1c 0%, #991b1b 100%) !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(220, 38, 38, 0.4) !important;
}

.danger-solid:active:not(:disabled) {
  transform: translateY(0);
}

/* 页脚 */
footer {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
  padding: 32px 0 16px;
  border-top: 1px solid rgba(210, 222, 215, 0.4);
  margin-top: 40px;
}

/* 响应式断点适配 */
@media (max-width: 1024px) {
  aside {
    width: 200px;
    padding: 20px 14px;
  }
  main {
    margin-left: 232px;
    padding: 16px 20px 32px;
  }
}

@media (max-width: 768px) {
  aside {
    display: none;
  }
  main {
    margin-left: 0;
    padding: 14px 14px 30px;
  }
  header {
    height: 56px;
    padding: 0 16px;
  }
  .intro {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  .taskbar {
    flex-direction: column;
    align-items: stretch;
  }
  .task-buttons {
    width: 100%;
  }
  .task-buttons button {
    flex: 1;
  }
  .course-card {
    grid-template-columns: 24px minmax(0, 1fr);
    grid-template-rows: auto auto auto;
    padding: 12px 14px;
  }
  .card-top {
    grid-row: 1 / 4;
  }
  .course-progress {
    grid-column: 2;
    grid-row: 3;
    margin-top: 8px;
  }
  .run-grid {
    grid-template-columns: 1fr;
  }
  .settings-grid {
    grid-template-columns: 1fr;
  }
}