/* ============================================
   UI 组件库样式表
   ============================================ */

/* ==========================================================
   1. 面板 / 容器（四角分离风格）
   ========================================================== */

.panel {
  position: relative;
  background:
    linear-gradient(135deg, rgba(34, 211, 238, 0.08) 0%, transparent 40%),
    linear-gradient(180deg, rgba(34, 211, 238, 0.04), rgba(12, 29, 46, 0.3));
  border: 1px solid var(--line-soft);
  padding: 18px 16px 16px;
  backdrop-filter: blur(4px);
}
.panel::before, .panel::after,
.panel > .corner-tl, .panel > .corner-tr,
.panel > .corner-bl, .panel > .corner-br {
  transition: box-shadow 200ms;
}
.panel:hover { border-color: var(--line-base); }

.panel::before,
.panel::after,
.panel > .corner-tl,
.panel > .corner-tr,
.panel > .corner-bl,
.panel > .corner-br {
  content: '';
  position: absolute;
  width: 8px; height: 8px;
  background: var(--cyan-500);
  box-shadow: 0 0 6px var(--cyan-glow);
}
.panel::before  { top: -3px; left: -3px; }
.panel::after   { top: -3px; right: -3px; }
.panel .corner-bl { bottom: -3px; left: -3px; }
.panel .corner-br { bottom: -3px; right: -3px; }

/* Variant: hollow corners (outlined squares) */
.panel--outline::before, .panel--outline::after,
.panel--outline > .corner-bl, .panel--outline > .corner-br {
  width: 10px; height: 10px;
  background: var(--bg-base);
  border: 1px solid var(--cyan-500);
  box-shadow: none;
}

/* Variant: beveled corners (clip-path) */
.panel--bevel {
  clip-path: polygon(
    0 8px, 8px 0,
    calc(100% - 8px) 0, 100% 8px,
    100% calc(100% - 8px), calc(100% - 8px) 100%,
    8px 100%, 0 calc(100% - 8px)
  );
  border: none;
  background:
    linear-gradient(135deg, var(--cyan-500), transparent 30%, transparent 70%, var(--cyan-500)) border-box,
    linear-gradient(180deg, rgba(34, 211, 238, 0.08), rgba(34, 211, 238, 0.02)) padding-box;
  padding: 1px;
}
.panel--bevel::before,
.panel--bevel::after,
.panel--bevel > .corner-bl,
.panel--bevel > .corner-br { display: none; }

.panel--bevel > .panel-inner {
  clip-path: polygon(
    0 8px, 8px 0,
    calc(100% - 8px) 0, 100% 8px,
    100% calc(100% - 8px), calc(100% - 8px) 100%,
    8px 100%, 0 calc(100% - 8px)
  );
  background: var(--bg-surface);
  padding: 18px 16px 16px;
}

/* Variant: L-shaped corner brackets */
.panel--brackets { border: none; background: rgba(12, 29, 46, 0.5); }
.panel--brackets::before, .panel--brackets::after,
.panel--brackets > .corner-bl, .panel--brackets > .corner-br {
  width: 14px; height: 14px;
  background: transparent;
  box-shadow: none;
}
.panel--brackets::before { top: 0; left: 0;
  border-top: 2px solid var(--cyan-500);
  border-left: 2px solid var(--cyan-500); }
.panel--brackets::after { top: 0; right: 0;
  border-top: 2px solid var(--cyan-500);
  border-right: 2px solid var(--cyan-500); }
.panel--brackets > .corner-bl { bottom: 0; left: 0;
  border-bottom: 2px solid var(--cyan-500);
  border-left: 2px solid var(--cyan-500); }
.panel--brackets > .corner-br { bottom: 0; right: 0;
  border-bottom: 2px solid var(--cyan-500);
  border-right: 2px solid var(--cyan-500); }

/* ---------- 面板头部 ---------- */
.panel-head {
  display: flex; align-items: center; gap: 8px;
  padding-bottom: 10px; margin-bottom: 12px;
  border-bottom: 1px solid var(--line-hair);
  position: relative;
}
.panel-head::after {
  content: '';
  position: absolute;
  left: 0; bottom: -1px;
  width: 60px; height: 1px;
  background: var(--cyan-500);
  box-shadow: 0 0 4px var(--cyan-glow);
}
.panel-head-icon {
  width: 14px; height: 14px;
  color: var(--cyan-500);
  flex: none;
}
.panel-head-title {
  font-family: var(--f-display);
  font-size: 15px; font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.06em;
}
.panel-head-sub {
  font-family: var(--f-mono);
  font-size: 10px;
  color: var(--text-tertiary);
  margin-left: auto;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 2px 6px;
  border: 1px solid var(--line-hair);
  background: rgba(34, 211, 238, 0.04);
}
.panel-head-accent {
  width: 3px; height: 14px;
  background: var(--cyan-500);
  box-shadow: 0 0 6px var(--cyan-glow);
  position: relative;
}
.panel-head-accent::before {
  content: '';
  position: absolute;
  left: -2px; right: -2px; top: 4px; bottom: 4px;
  background: var(--cyan-500);
  opacity: 0.3;
  filter: blur(3px);
}

/* ==========================================================
   2. 按钮
   ========================================================== */

.btn {
  display: inline-flex;
  align-items: center; justify-content: center;
  gap: 6px;
  padding: 7px 16px;
  font-family: var(--f-sans);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid var(--line-base);
  cursor: pointer;
  position: relative;
  transition: all 180ms;
  text-transform: uppercase;
}
.btn:hover {
  background: rgba(34, 211, 238, 0.18);
  border-color: var(--cyan-500);
  box-shadow: var(--glow-cyan-sm), inset 0 0 12px rgba(34, 211, 238, 0.12);
}
.btn--primary {
  background: linear-gradient(180deg, var(--cyan-500), #0892b0);
  border-color: var(--cyan-500);
  color: #001820;
  font-weight: 600;
}
.btn--primary:hover {
  box-shadow: var(--glow-cyan-md);
  filter: brightness(1.1);
}
.btn--ghost {
  background: transparent;
  border-color: var(--line-soft);
  color: var(--text-secondary);
}
.btn--cut {
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.btn--danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.5);
  color: #ffb3b3;
}
.btn--danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--red-500);
}

/* Icon-only button */
.btn-icon {
  width: 30px; height: 30px;
  padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
}

/* ==========================================================
   3. Tab 切换
   ========================================================== */

.tabs {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--line-soft);
}
.tab {
  position: relative;
  padding: 8px 20px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: color 180ms;
  background: transparent;
  border: none;
  font-family: inherit;
}
.tab:hover { color: var(--text-primary); }
.tab.active {
  color: var(--cyan-400);
}
.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 2px;
  background: var(--cyan-500);
  box-shadow: 0 0 8px var(--cyan-glow);
}
.tab.active::before {
  content: '';
  position: absolute;
  bottom: -5px; left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 6px; height: 6px;
  background: var(--cyan-500);
}

/* Segmented control */
.segmented {
  display: inline-flex;
  border: 1px solid var(--line-base);
  background: var(--bg-surface);
}
.segmented > button {
  padding: 6px 14px;
  font-size: 11px;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.04em;
  position: relative;
}
.segmented > button + button { border-left: 1px solid var(--line-soft); }
.segmented > button.active {
  background: rgba(34, 211, 238, 0.18);
  color: var(--cyan-300);
  box-shadow: inset 0 0 12px rgba(34, 211, 238, 0.2);
}

/* ==========================================================
   4. 数据卡片 / KPI
   ========================================================== */

.kpi {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 16px;
  background:
    linear-gradient(135deg, rgba(34, 211, 238, 0.1) 0%, rgba(34, 211, 238, 0.02) 50%);
  border: 1px solid var(--line-hair);
  border-left: 2px solid var(--cyan-500);
  position: relative;
  overflow: hidden;
}
.kpi::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 24px; height: 24px;
  border-top: 1px solid var(--cyan-500);
  border-right: 1px solid var(--cyan-500);
  opacity: 0.5;
}
.kpi::after {
  content: ''; position: absolute;
  inset: 0 0 0 auto; width: 60%;
  background: radial-gradient(ellipse at right, rgba(34, 211, 238, 0.1), transparent 70%);
  pointer-events: none;
}
.kpi-label {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--f-mono);
}
.kpi-value {
  font-family: var(--f-display);
  font-size: 30px;
  font-weight: 600;
  color: var(--cyan-300);
  line-height: 1.1;
  text-shadow: 0 0 12px var(--cyan-glow);
  letter-spacing: 0.02em;
}
.kpi-value .unit {
  font-size: 12px;
  color: var(--text-secondary);
  margin-left: 4px;
  text-shadow: none;
}
.kpi-delta {
  font-size: 10px;
  font-family: var(--f-mono);
  display: inline-flex; gap: 3px; align-items: center;
}
.kpi-delta.up { color: var(--green-500); }
.kpi-delta.down { color: var(--red-500); }

/* ==========================================================
   5. 状态徽标 / 告警
   ========================================================== */

.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--f-mono);
  position: relative;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}
.badge::before {
  content: ''; width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 6px currentColor;
  animation: pulse-glow 2s ease-in-out infinite;
}
.badge--online { color: var(--green-500); }
.badge--warn { color: var(--amber-500); }
.badge--error { color: var(--red-500); animation: blink 1s ease-in-out infinite; }
.badge--idle { color: var(--text-tertiary); }
.badge--info { color: var(--cyan-400); }

/* ==========================================================
   6. 进度条 / 仪表
   ========================================================== */

.progress {
  position: relative;
  height: 10px;
  background: rgba(34, 211, 238, 0.06);
  border: 1px solid var(--line-soft);
  padding: 1px;
}
.progress-fill {
  height: 100%;
  background:
    repeating-linear-gradient(90deg, var(--cyan-500) 0 4px, rgba(34,211,238,0.4) 4px 6px),
    linear-gradient(90deg, var(--cyan-700), var(--cyan-500));
  box-shadow: 0 0 8px var(--cyan-glow);
  position: relative;
  transition: width 400ms;
}
.progress-fill::after {
  content: ''; position: absolute;
  top: 0; bottom: 0; right: 0;
  width: 3px;
  background: var(--cyan-300);
  box-shadow: 0 0 8px var(--cyan-300);
}
.progress--segmented {
  background: transparent;
  border: none;
  display: flex; gap: 2px;
}
.progress--segmented .seg {
  flex: 1;
  background: rgba(34, 211, 238, 0.12);
  height: 100%;
}
.progress--segmented .seg.on {
  background: var(--cyan-500);
  box-shadow: 0 0 4px var(--cyan-glow);
}

/* ==========================================================
   7. 列表 / 表格
   ========================================================== */

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
table.data-table th {
  text-align: left;
  padding: 8px 10px;
  font-weight: 500;
  color: var(--cyan-300);
  background: rgba(34, 211, 238, 0.08);
  border-bottom: 1px solid var(--line-base);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
table.data-table td {
  padding: 8px 10px;
  border-bottom: 1px dashed var(--line-hair);
  color: var(--text-secondary);
  font-family: var(--f-mono);
}
table.data-table tr:hover td {
  background: rgba(34, 211, 238, 0.05);
  color: var(--text-primary);
}

/* ==========================================================
   8. 装饰元素
   ========================================================== */

.divider-h {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-base) 20%, var(--line-base) 80%, transparent);
  margin: 12px 0;
}
.divider-h.with-dot { position: relative; }
.divider-h.with-dot::after {
  content: ''; position: absolute;
  left: 50%; top: 50%;
  width: 5px; height: 5px;
  transform: translate(-50%, -50%) rotate(45deg);
  background: var(--cyan-500);
  box-shadow: 0 0 6px var(--cyan-glow);
}

.scan-line {
  position: relative;
  overflow: hidden;
}
.scan-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, var(--cyan-glow) 48%, var(--cyan-300) 50%, var(--cyan-glow) 52%, transparent 100%);
  animation: scan-y 3s linear infinite;
  pointer-events: none;
}

/* Header banner (科技感标题条) */
.hero-title {
  position: relative;
  text-align: center;
  padding: 20px 0 24px;
}
.hero-title h1 {
  font-family: var(--f-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  text-shadow: 0 0 16px var(--cyan-glow);
  display: inline-flex; align-items: center; gap: 20px;
}
.hero-title h1::before,
.hero-title h1::after {
  content: '';
  width: 120px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-500));
}
.hero-title h1::after {
  background: linear-gradient(90deg, var(--cyan-500), transparent);
}
.hero-title .sub {
  font-family: var(--f-mono);
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: 0.3em;
  margin-top: 6px;
}

/* 扫描角标 */
.corner-deco {
  position: absolute;
  width: 28px; height: 28px;
  pointer-events: none;
}
.corner-deco svg { width: 100%; height: 100%; }

/* Ring / 光晕装饰 */
.spin-ring {
  animation: rotate-ring 8s linear infinite;
  transform-origin: center;
}

/* ==========================================================
   9. 输入框 / 搜索框
   ========================================================== */

.input {
  width: 100%;
  padding: 7px 12px;
  background: rgba(5, 16, 28, 0.6);
  border: 1px solid var(--line-base);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 12px;
  outline: none;
}
.input:focus {
  border-color: var(--cyan-500);
  box-shadow: var(--glow-cyan-sm);
}
.input-group {
  display: flex; align-items: center;
  border: 1px solid var(--line-base);
  background: rgba(5, 16, 28, 0.6);
}
.input-group .input { border: none; }
.input-group svg {
  width: 14px; height: 14px;
  margin: 0 10px;
  color: var(--cyan-400);
}

/* ==========================================================
   10. 告警/日志条目
   ========================================================== */

.log-item {
  display: grid;
  grid-template-columns: 60px 70px 1fr auto;
  gap: 10px;
  padding: 6px 8px;
  border-bottom: 1px dashed var(--line-hair);
  font-family: var(--f-mono);
  font-size: 11px;
  align-items: center;
}
.log-item:hover { background: rgba(34, 211, 238, 0.04); }
.log-item .time { color: var(--text-tertiary); }
.log-item .level {
  font-size: 10px;
  text-align: center;
  padding: 1px 0;
  letter-spacing: 0.05em;
}
.log-item .level.ERR { color: var(--red-500); border: 1px solid var(--red-500); }
.log-item .level.WRN { color: var(--amber-500); border: 1px solid var(--amber-500); }
.log-item .level.INF { color: var(--cyan-400); border: 1px solid var(--cyan-400); }
.log-item .msg { color: var(--text-secondary); }
.log-item .src { color: var(--text-tertiary); font-size: 10px; }