/* ═══════════════════════════════════════════════════════
   ly的提问箱 — 赛博朋克 / 科技感主题
   ═══════════════════════════════════════════════════════ */

/* 使用系统字体，国内无需加载 Google Fonts */
/* Noto Sans SC → PingFang / Microsoft YaHei 替代 */
/* Share Tech Mono → Consolas / Courier New 替代 */

:root {
  /* 🌃 暗色基底 + 霓虹配色 */
  --bg:            #0a0e17;
  --bg-card:       #111827;
  --bg-card-alt:   #161e2b;
  --bg-input:      #0d1320;

  --cyan:          #00e5ff;
  --cyan-dark:     #009faf;
  --cyan-glow:     0 0 12px rgba(0, 229, 255, 0.4), 0 0 30px rgba(0, 229, 255, 0.15);
  --cyan-glow-sm:  0 0 6px rgba(0, 229, 255, 0.3);

  --purple:        #b347ea;
  --purple-dark:   #7c2bb0;
  --purple-glow:   0 0 12px rgba(179, 71, 234, 0.4), 0 0 30px rgba(179, 71, 234, 0.15);

  --pink:          #ff2d78;
  --green:         #00e676;
  --orange:        #ff9100;
  --yellow:        #ffea00;
  --blue:          #448aff;

  --text:          #e0e6f0;
  --text-light:    #a0b0c8;
  --text-muted:    #5a6880;
  --border:        #1e2d42;
  --border-glow:   #00e5ff33;

  --radius:        8px;
  --radius-sm:     6px;

  --font:          'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', -apple-system, sans-serif;
  --font-mono:     'SF Mono', 'Consolas', 'Courier New', monospace;
}

/* ── Reset ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* 科技网格背景 */
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* 扫描线叠加 */
body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.02) 2px,
    rgba(0, 0, 0, 0.02) 4px
  );
  opacity: 0.3;
}

/* ── Header ───────────────────────────────────────────── */
.header {
  background: linear-gradient(180deg, #0d1b2a 0%, #0a1628 100%);
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* 顶部霓虹发光线 */
.header::before {
  content: '';
  position: absolute;
  bottom: 0; left: 5%; right: 5%;
  height: 1px;
  background: linear-gradient(90deg,
    transparent, var(--cyan), transparent);
  box-shadow: var(--cyan-glow);
}

/* 粒子装饰 */
.header::after {
  content: '';
  position: absolute;
  top: 10px; right: 15%;
  width: 4px; height: 4px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow:
    0 0 8px var(--cyan),
    -20px 15px 0 2px var(--purple),
    -20px 15px 0 2px var(--purple),
    -50px 8px 0 1px var(--cyan),
    -80px 18px 0 1px var(--cyan);
  animation: particles 4s ease-in-out infinite;
}

@keyframes particles {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.header-inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 16px;
}

.header h1 {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--cyan) 0%, #80f0ff 50%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  filter: drop-shadow(0 0 12px rgba(0, 229, 255, 0.3));
}

.header h1 .icon {
  font-size: 1.5rem;
  -webkit-text-fill-color: initial;
}

.header .subtitle {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 6px;
  font-weight: 400;
  font-family: var(--font-mono);
  letter-spacing: 2px;
  opacity: 0.7;
}

/* ── Container ────────────────────────────────────────── */
.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* ── Cards ────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
  transition: border-color 0.3s, box-shadow 0.3s;
  position: relative;
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 30px rgba(0,0,0,0.4), 0 0 15px rgba(0, 229, 255, 0.05);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-family: var(--font-mono);
}

/* ── Form ─────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-light);
  letter-spacing: 1px;
  font-family: var(--font-mono);
}

textarea, input[type="text"], input[type="password"],
.admin-toolbar select, .admin-toolbar input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font);
  background: var(--bg-input);
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
  resize: vertical;
}

textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.1), var(--cyan-glow-sm);
}

textarea { min-height: 100px; }

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: var(--font-mono);
}
.char-count.warn   { color: var(--orange); }
.char-count.danger { color: var(--pink); }

/* ── Category Pills ───────────────────────────────────── */
.category-pills { display: flex; flex-wrap: wrap; gap: 8px; }

.cat-pill {
  padding: 6px 14px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-input);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-mono);
  color: var(--text-light);
  letter-spacing: 1px;
}

.cat-pill:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: var(--cyan-glow-sm);
}

.cat-pill.active {
  color: #000;
  border-color: transparent;
  font-weight: 700;
}

.cat-pill[data-cat="学习"].active { background: var(--cyan); box-shadow: var(--cyan-glow-sm); }
.cat-pill[data-cat="生活"].active { background: var(--green); box-shadow: 0 0 8px rgba(0,230,118,0.4); }
.cat-pill[data-cat="情感"].active { background: var(--pink); box-shadow: 0 0 8px rgba(255,45,120,0.4); }
.cat-pill[data-cat="工作"].active { background: var(--purple); box-shadow: 0 0 8px rgba(179,71,234,0.4); }
.cat-pill[data-cat="游戏"].active { background: var(--orange); box-shadow: 0 0 8px rgba(255,145,0,0.4); }
.cat-pill[data-cat="吐槽"].active { background: var(--yellow); color: #000; box-shadow: 0 0 8px rgba(255,234,0,0.4); }
.cat-pill[data-cat="其他"].active { background: var(--text-light); }

/* ── Password Row ─────────────────────────────────────── */
.password-row { display: flex; gap: 8px; }
.password-row input { flex: 1; }

.password-hint {
  display: flex; align-items: center; gap: 4px;
  font-size: 0.7rem; color: var(--text-muted);
  padding: 0 4px; white-space: nowrap;
  font-family: var(--font-mono);
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center; justify-content: center; gap: 6px;
  padding: 10px 24px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 1px;
  position: relative;
  text-transform: uppercase;
}

.btn-primary {
  background: var(--cyan);
  color: #000;
  box-shadow: var(--cyan-glow);
}
.btn-primary:hover {
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.6), 0 0 40px rgba(0, 229, 255, 0.25);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(1px); }

.btn-block { width: 100%; }

.btn-sm { padding: 6px 14px; font-size: 0.75rem; }

.btn-danger {
  background: transparent;
  border-color: var(--pink);
  color: var(--pink);
}
.btn-danger:hover {
  background: var(--pink);
  color: #fff;
  box-shadow: 0 0 12px rgba(255, 45, 120, 0.4);
}

.btn-success {
  background: transparent;
  border-color: var(--green);
  color: var(--green);
}
.btn-success:hover {
  background: var(--green);
  color: #000;
  box-shadow: 0 0 12px rgba(0, 230, 118, 0.4);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-light);
}
.btn-outline:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: var(--cyan-glow-sm);
}

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

/* ── Question List ────────────────────────────────────── */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px;
}

.filter-bar select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  background: var(--bg-input);
  color: var(--text-light);
  cursor: pointer;
}

.question-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  transition: border-color 0.2s, box-shadow 0.2s;
  animation: slideUp 0.3s ease-out;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.question-item:hover {
  border-color: var(--border-glow);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3), 0 0 12px rgba(0, 229, 255, 0.05);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.q-meta {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 10px; flex-wrap: wrap;
}

.q-cat {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 1px;
  color: #000;
}

.q-cat[data-cat="学习"] { background: var(--cyan); }
.q-cat[data-cat="生活"] { background: var(--green); }
.q-cat[data-cat="情感"] { background: var(--pink); }
.q-cat[data-cat="工作"] { background: var(--purple); }
.q-cat[data-cat="游戏"] { background: var(--orange); }
.q-cat[data-cat="吐槽"] { background: var(--yellow); color: #000; }
.q-cat[data-cat="其他"] { background: var(--text-light); }

.q-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.q-nickname {
  font-size: 0.75rem;
  color: var(--text-light);
  font-weight: 500;
}

.q-content {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── Reply Bubble ─────────────────────────────────────── */
.reply-bubble {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--bg-card-alt);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--green);
  font-size: 0.85rem;
  color: var(--text);
  position: relative;
}

.reply-bubble::before {
  content: '[ REPLY ]';
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 6px;
  font-family: var(--font-mono);
  letter-spacing: 2px;
}

.reply-bubble .reply-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-family: var(--font-mono);
}

/* ── Toast ────────────────────────────────────────────── */
.toast-container {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
  z-index: 9999; pointer-events: none;
}

.toast {
  padding: 12px 24px;
  border-radius: 4px;
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  margin-bottom: 8px;
  animation: toastIn 0.3s ease-out, toastOut 0.3s ease-in forwards;
  text-align: center;
  letter-spacing: 1px;
}

.toast.success { background: #00c853; box-shadow: 0 0 15px rgba(0,200,83,0.4); }
.toast.error   { background: var(--pink); box-shadow: 0 0 15px rgba(255,45,120,0.4); }
.toast.info    { background: var(--cyan); color: #000; box-shadow: var(--cyan-glow); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes toastOut {
  0%, 70% { opacity: 1; }
  100%    { opacity: 0; transform: translateY(-10px); }
}

/* ── Pagination ───────────────────────────────────────── */
.pagination {
  display: flex; justify-content: center; align-items: center;
  gap: 12px; margin-top: 24px;
}
.pagination .page-info {
  font-size: 0.8rem;
  color: var(--text-light);
  font-family: var(--font-mono);
}

/* ── Empty State ──────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 48px 20px; color: var(--text-muted);
}
.empty-state .empty-icon {
  font-size: 3rem; display: block; margin-bottom: 12px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}
.empty-state p {
  font-size: 0.9rem; font-weight: 400;
  font-family: var(--font-mono);
  letter-spacing: 1px;
}

/* ── Admin ────────────────────────────────────────────── */
.admin-toolbar {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px;
}
.admin-toolbar select, .admin-toolbar input {
  width: auto; padding: 8px 12px;
  font-family: var(--font-mono);
}
.admin-toolbar .spacer { flex: 1; }

.q-actions { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }

.reply-form {
  margin-top: 12px; display: flex; gap: 8px;
}
.reply-form input {
  flex: 1; padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: var(--font);
  background: var(--bg-input);
  color: var(--text);
}
.reply-form input:focus {
  border-color: var(--green);
  box-shadow: 0 0 8px rgba(0,230,118,0.2);
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 3px;
  font-size: 0.65rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 1px;
}
.badge-new {
  background: rgba(255,145,0,0.15);
  color: var(--orange);
  border: 1px solid rgba(255,145,0,0.3);
}
.badge-replied {
  background: rgba(0,230,118,0.1);
  color: var(--green);
  border: 1px solid rgba(0,230,118,0.3);
}

.login-card { max-width: 400px; margin: 60px auto 0; }

.nav-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--cyan); text-decoration: none;
  font-size: 0.75rem; font-family: var(--font-mono);
  opacity: 0.7; transition: opacity 0.2s; margin-top: 8px;
  letter-spacing: 1px;
}
.nav-link:hover { opacity: 1; text-shadow: var(--cyan-glow-sm); }

/* ── Footer ───────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-family: var(--font-mono);
  letter-spacing: 1px;
  border-top: 1px solid var(--border);
}
.footer span { color: var(--cyan); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 480px) {
  .header h1 { font-size: 1.3rem; letter-spacing: 2px; }
  .header .subtitle { font-size: 0.7rem; }

  .card { padding: 16px; }
  .card-title { font-size: 0.9rem; }

  .btn { padding: 8px 18px; font-size: 0.8rem; }

  .question-item { padding: 14px; }

  .pagination { gap: 6px; }
  .pagination .btn { padding: 6px 12px; font-size: 0.7rem; }

  .filter-bar { flex-direction: column; }
  .filter-bar select { width: 100%; }

  .password-row { flex-direction: column; }
  .password-hint { justify-content: flex-start; }
}

/* ── Scrollbar ────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan-dark); }