/* ============================================================
   CyberSafety Quest — 共享样式
   暗色 / 赛博感 / 渐变 / 微动效 / 卡片化
   ============================================================ */

/* ---------- 主题色 (CSS 自定义属性) ---------- */
:root {
  --color-primary: #22d3ee;   /* 青绿 */
  --color-secondary: #8b5cf6; /* 紫 */
  --color-danger: #ef4444;    /* 危险红 */
  --color-safe: #22c55e;      /* 安全绿 */
  --color-bg: #0b1020;        /* 页面深底 */
  --color-bg-card: #151b30;   /* 卡片底 */
  --color-text: #e6edf7;      /* 主文字 */
  --color-text-dim: #9fb0c8;  /* 次要文字 */
  --color-border: #2a3550;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(160deg, #0b1020 0%, #141a33 55%, #1a1033 100%);
  background-attachment: fixed;
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---------- 布局 ---------- */
.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 28px;
}

.brand {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

nav.site a {
  color: var(--color-text-dim);
  text-decoration: none;
  margin-left: 16px;
  font-size: 0.95rem;
  transition: color 0.2s;
}
nav.site a:hover { color: var(--color-primary); }

main { min-height: 50vh; }

footer.site {
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-dim);
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- 标题渐变 ---------- */
h1.grad {
  font-size: 2.2rem;
  line-height: 1.2;
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sub { color: var(--color-text-dim); margin-bottom: 26px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 16px 40px rgba(34, 211, 238, 0.15);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  color: #04121a;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: transform 0.15s ease, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(34, 211, 238, 0.3); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn.ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn.ghost:hover { background: rgba(34, 211, 238, 0.1); }

/* ---------- 反馈条 ---------- */
.feedback {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  display: none;
}
.feedback.show { display: block; animation: pop 0.3s ease; }
.feedback.good { border-color: var(--color-safe); color: var(--color-safe); }
.feedback.bad  { border-color: var(--color-danger); color: var(--color-danger); }

@keyframes pop {
  from { transform: scale(0.96); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

/* ---------- 真实案例弹层 ---------- */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(5, 8, 18, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}
.modal-mask.show { display: flex; }

.modal {
  background: var(--color-bg-card);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 26px;
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow);
  animation: pop 0.3s ease;
}
.modal h3 { margin-bottom: 10px; color: var(--color-primary); }
.modal p { color: var(--color-text); margin-bottom: 14px; }
.modal .case {
  background: rgba(139, 92, 246, 0.12);
  border-left: 4px solid var(--color-secondary);
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

/* ---------- 进度 / 分数 ---------- */
.hud {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  color: var(--color-text-dim);
  font-size: 0.95rem;
}
.hud b { color: var(--color-primary); }

/* ---------- 选项列表 ---------- */
.option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  margin-bottom: 12px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.15s;
}
.option:hover { border-color: var(--color-primary); transform: translateX(4px); }
.option.picked-good { border-color: var(--color-safe); background: rgba(34, 197, 94, 0.12); }
.option.picked-bad  { border-color: var(--color-danger); background: rgba(239, 68, 68, 0.12); }

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
  h1.grad { font-size: 1.7rem; }
  .wrap { padding: 16px 14px 40px; }
  header.site { flex-direction: column; align-items: flex-start; }
  nav.site a { margin-left: 0; margin-right: 14px; }
}