/* ========================================================
   Apple-inspired Design System
   用于 learning / review / 以及后续所有重设计页面
   ======================================================== */

:root {
  /* 色板 · Dark Mode (macOS Sonoma 风) */
  --bg-base: #000000;
  --bg-elev-1: #0a0a0d;
  --bg-elev-2: #14141a;
  --bg-elev-3: #1c1c24;

  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --surface-border: rgba(255, 255, 255, 0.08);
  --surface-border-strong: rgba(255, 255, 255, 0.14);

  --text-primary: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(235, 235, 245, 0.6);
  --text-tertiary: rgba(235, 235, 245, 0.35);

  /* 苹果官方色 */
  --blue: #0a84ff;
  --purple: #bf5af2;
  --pink: #ff375f;
  --red: #ff453a;
  --orange: #ff9f0a;
  --yellow: #ffd60a;
  --green: #30d158;
  --teal: #40c8e0;
  --indigo: #5e5ce6;

  --accent: var(--blue);
  --accent-gradient: linear-gradient(135deg, #0a84ff 0%, #5e5ce6 50%, #bf5af2 100%);
  --success-gradient: linear-gradient(135deg, #30d158, #40c8e0);
  --warn-gradient: linear-gradient(135deg, #ff9f0a, #ff375f);

  /* 圆角 */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35), 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(94, 92, 230, 0.3);

  /* 动效 */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 0.15s;
  --dur-base: 0.25s;
  --dur-slow: 0.4s;
}

/* ========== reset ========== */
* { box-sizing: border-box; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
html, body { margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
               "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  font-size: 14px;
  letter-spacing: -0.01em;
}

/* 背景：静态渐变光晕 */
body::before {
  content: "";
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 15% -10%, rgba(94, 92, 230, 0.15), transparent 60%),
    radial-gradient(ellipse 50% 35% at 85% 110%, rgba(191, 90, 242, 0.08), transparent 60%),
    radial-gradient(ellipse 40% 30% at 50% 50%, rgba(10, 132, 255, 0.04), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ========== 顶栏 —— 玻璃质感 ========== */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 16px;
  padding: 14px 24px;
  background: rgba(10, 10, 13, 0.72);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  border-bottom: 1px solid var(--surface-border);
}
.topbar .back {
  color: var(--text-secondary); text-decoration: none;
  font-size: 13px; font-weight: 500;
  padding: 6px 12px; border-radius: var(--radius-sm);
  transition: all var(--dur-fast) var(--ease-out);
}
.topbar .back:hover { color: var(--text-primary); background: var(--surface); }
.topbar .title { font-size: 15px; font-weight: 600; letter-spacing: -0.02em; flex: 1; }
.topbar .right { display: flex; align-items: center; gap: 8px; }

.topbar .pill {
  padding: 5px 12px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--surface-border);
  font-size: 12px; font-weight: 500; color: var(--text-secondary);
  text-decoration: none; transition: all var(--dur-fast) var(--ease-out);
}
.topbar .pill:hover { background: var(--surface-hover); color: var(--text-primary); }
.topbar .pill.accent {
  background: var(--accent-gradient); color: #fff; border-color: transparent;
  box-shadow: 0 0 20px rgba(94, 92, 230, 0.4);
}
.topbar .pill.accent:hover { transform: translateY(-1px); box-shadow: 0 4px 24px rgba(94, 92, 230, 0.5); }

/* ========== 页面容器 ========== */
.page {
  max-width: 1180px; margin: 0 auto;
  padding: 32px 24px 80px;
  position: relative; z-index: 1;
}

/* ========== Hero 标题区 ========== */
.hero {
  margin: 8px 0 32px;
}
.hero h1 {
  margin: 0 0 10px;
  font-size: 40px; font-weight: 700; letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 0%, #a5a5b8 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h1 .emoji { -webkit-text-fill-color: initial; background: none; }
.hero .sub {
  color: var(--text-secondary); font-size: 15px;
  max-width: 720px; line-height: 1.6;
}

/* ========== 统计卡片 ========== */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 32px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  backdrop-filter: blur(20px);
  transition: all var(--dur-base) var(--ease-out);
  position: relative; overflow: hidden;
}
.stat-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.04), transparent 50%);
  pointer-events: none;
}
.stat-card:hover {
  background: var(--surface-hover);
  border-color: var(--surface-border-strong);
  transform: translateY(-2px);
}
.stat-num {
  font-size: 36px; font-weight: 700;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #ffffff 0%, #8e8ea0 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
  line-height: 1.05;
}
.stat-label {
  margin-top: 6px;
  font-size: 13px; color: var(--text-secondary); font-weight: 500;
}

/* ========== 通用 Card ========== */
.card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  backdrop-filter: blur(20px);
  transition: all var(--dur-base) var(--ease-out);
}
.card:hover { background: var(--surface-hover); border-color: var(--surface-border-strong); }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; min-height: 32px;
  font-family: inherit; font-size: 13px; font-weight: 500;
  border: none; border-radius: var(--radius-sm);
  cursor: pointer; transition: all var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent-gradient); color: #fff;
  box-shadow: 0 2px 10px rgba(94, 92, 230, 0.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(94, 92, 230, 0.5); }

.btn-success { background: linear-gradient(135deg, #30d158, #28b04a); color: #fff; box-shadow: 0 2px 10px rgba(48, 209, 88, 0.25); }
.btn-success:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(48, 209, 88, 0.4); }

.btn-danger { background: linear-gradient(135deg, #ff453a, #d9372e); color: #fff; box-shadow: 0 2px 10px rgba(255, 69, 58, 0.25); }
.btn-danger:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(255, 69, 58, 0.4); }

.btn-ghost {
  background: var(--surface); color: var(--text-secondary);
  border: 1px solid var(--surface-border);
}
.btn-ghost:hover { background: var(--surface-hover); color: var(--text-primary); border-color: var(--surface-border-strong); }

.btn-sm { padding: 5px 12px; min-height: 28px; font-size: 12px; }

/* ========== 输入 ========== */
.input, textarea.input, select.input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 10px 14px;
  font-family: inherit; font-size: 13px;
  transition: all var(--dur-fast) var(--ease-out);
}
.input:focus, textarea.input:focus, select.input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-elev-2);
  box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.2);
}
textarea.input { resize: vertical; min-height: 70px; line-height: 1.5; }

/* ========== 标签/徽章 ========== */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 500; letter-spacing: 0.01em;
  background: var(--surface); color: var(--text-secondary);
  border: 1px solid var(--surface-border);
}
.badge.accent { background: var(--accent-gradient); color: #fff; border-color: transparent; }
.badge.green { background: rgba(48, 209, 88, 0.15); color: #30d158; border-color: rgba(48, 209, 88, 0.25); }
.badge.orange { background: rgba(255, 159, 10, 0.15); color: #ff9f0a; border-color: rgba(255, 159, 10, 0.25); }
.badge.red { background: rgba(255, 69, 58, 0.15); color: #ff453a; border-color: rgba(255, 69, 58, 0.25); }
.badge.blue { background: rgba(10, 132, 255, 0.15); color: #0a84ff; border-color: rgba(10, 132, 255, 0.25); }
.badge.purple { background: rgba(191, 90, 242, 0.15); color: #bf5af2; border-color: rgba(191, 90, 242, 0.25); }

/* ========== Toast 通知 ========== */
#appleToastRoot {
  position: fixed; top: 80px; right: 24px; z-index: 9999;
  display: flex; flex-direction: column; gap: 10px;
  max-width: 380px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  background: rgba(28, 28, 36, 0.92);
  backdrop-filter: saturate(180%) blur(24px);
  border: 1px solid var(--surface-border-strong);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  display: flex; align-items: flex-start; gap: 10px;
  transform: translateX(calc(100% + 30px));
  opacity: 0;
  transition: all var(--dur-base) var(--ease-out);
  max-width: 380px;
}
.toast.show { transform: translateX(0); opacity: 1; }
.toast .icon { font-size: 18px; line-height: 1; flex-shrink: 0; }
.toast.success .icon { color: #30d158; }
.toast.error .icon { color: #ff453a; }
.toast.info .icon { color: #0a84ff; }
.toast .body { flex: 1; line-height: 1.5; }
.toast .body strong { color: var(--text-primary); display: block; margin-bottom: 2px; }
.toast .body span { color: var(--text-secondary); font-size: 12px; }
.toast pre {
  margin: 6px 0 0; font-family: "SF Mono", Menlo, Consolas, monospace;
  background: rgba(0,0,0,0.3); padding: 8px 10px; border-radius: 6px;
  font-size: 11px; max-height: 160px; overflow: auto;
  color: var(--text-secondary); white-space: pre-wrap;
}

/* ========== 模态 Dialog ========== */
.dialog-mask {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn var(--dur-base) var(--ease-out);
}
.dialog {
  background: rgba(20, 20, 26, 0.95);
  backdrop-filter: saturate(180%) blur(30px);
  border: 1px solid var(--surface-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  max-width: 520px; width: 90%;
  animation: dialogIn var(--dur-base) var(--ease-out);
}
.dialog h3 { margin: 0 0 6px; font-size: 17px; font-weight: 600; letter-spacing: -0.02em; }
.dialog .dlg-sub { color: var(--text-secondary); font-size: 13px; margin-bottom: 14px; }
.dialog .dlg-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 18px; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes dialogIn { from { opacity: 0; transform: scale(0.95) translateY(10px); } to { opacity: 1; transform: scale(1) translateY(0); } }

/* ========== Loading Spinner ========== */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== 滚动条 ========== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ========== 响应式 ========== */
@media (max-width: 640px) {
  .page { padding: 20px 16px 60px; }
  .hero h1 { font-size: 30px; }
  .stat-num { font-size: 28px; }
}


@keyframes bgTaskPulse {
  0%   { box-shadow: 0 0 40px rgba(94,92,230,0.4), 0 12px 40px rgba(0,0,0,0.6); }
  50%  { box-shadow: 0 0 80px rgba(94,92,230,0.9), 0 16px 50px rgba(0,0,0,0.7); transform: scale(1.04) translate(0,0); }
  100% { box-shadow: 0 0 40px rgba(94,92,230,0.4), 0 12px 40px rgba(0,0,0,0.6); transform: scale(1) translate(0,0); }
}