/* ===========================================================================
   tools.ipcloak.ai - 页面专属样式（Cyber Shield 子集）
   全局视觉走 cdn.ipcloak.ai/brand/cyber-shield.css
   =========================================================================== */

/* ----- 站内 Nav ----- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 0.85rem 0;
  background: rgba(6, 8, 13, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--ipcloak-border);
}
.site-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-nav-brand {
  display: flex; align-items: center; gap: 0.6rem;
  text-decoration: none; color: var(--ipcloak-text);
  font-family: var(--ipcloak-font-display);
  font-weight: 700; font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.site-nav-icon {
  width: 32px; height: 32px;
  border-radius: var(--ipcloak-radius-sm);
  background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 14px;
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.4);
}
.site-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 1.75rem; align-items: center;
}
.site-nav ul a {
  color: var(--ipcloak-text-muted);
  font-size: 0.95rem; font-weight: 500;
  text-decoration: none; transition: color 0.2s;
}
.site-nav ul a:hover { color: var(--ipcloak-cyan); }
@media (max-width: 768px) {
  .site-nav ul li:not(.always-show) { display: none; }
}

/* ----- 工具卡片 ----- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 900px) { .tool-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .tool-grid { grid-template-columns: 1fr; } }

.tool-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  backdrop-filter: blur(24px);
  border: 1px solid var(--ipcloak-border);
  border-radius: var(--ipcloak-radius-lg);
  padding: 1.5rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--ipcloak-cyan), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.tool-card:hover {
  transform: translateY(-3px);
  border-color: rgba(34, 211, 238, 0.3);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.04), rgba(255,255,255,0.02));
  box-shadow: 0 12px 30px -8px rgba(0, 0, 0, 0.5), 0 0 30px rgba(34, 211, 238, 0.1);
  color: inherit;
}
.tool-card:hover::before { opacity: 1; }

.tool-card.disabled {
  opacity: 0.5;
  pointer-events: none;
}
.tool-icon {
  width: 44px; height: 44px;
  border-radius: var(--ipcloak-radius-sm);
  background: linear-gradient(135deg, rgba(34,211,238,0.15), rgba(99,102,241,0.15));
  display: grid; place-items: center;
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  border: 1px solid rgba(34, 211, 238, 0.15);
}
.tool-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  font-family: var(--ipcloak-font-display);
  color: var(--ipcloak-text);
}
.tool-card p {
  color: var(--ipcloak-text-muted);
  font-size: 0.92rem;
  margin: 0 0 0.75rem;
  line-height: 1.6;
}
.tool-card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--ipcloak-cyan);
  font-weight: 600;
  font-size: 0.9rem;
  font-family: var(--ipcloak-font-mono);
}
.tool-card.disabled .tool-card-arrow { color: var(--ipcloak-text-subtle); }

/* ----- 类目标题 ----- */
.category-title {
  font-family: var(--ipcloak-font-display);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ipcloak-text-muted);
  margin: 3rem 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.category-title::before {
  content: '';
  width: 4px;
  height: 16px;
  background: linear-gradient(180deg, var(--ipcloak-cyan), var(--ipcloak-purple));
  border-radius: 2px;
}

/* ----- 工具页 hero ----- */
.tool-page-hero {
  padding: 3rem 0 1.5rem;
  position: relative;
}
.tool-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 30% 0%, rgba(34, 211, 238, 0.08), transparent 60%);
  pointer-events: none;
}
.tool-page-hero .breadcrumb {
  font-size: 0.9rem;
  color: var(--ipcloak-text-muted);
  margin-bottom: 1rem;
  font-family: var(--ipcloak-font-mono);
}
.tool-page-hero .breadcrumb a {
  color: var(--ipcloak-text-muted);
  text-decoration: none;
}
.tool-page-hero .breadcrumb a:hover { color: var(--ipcloak-cyan); }
.tool-page-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}
.tool-page-hero p.lead {
  color: var(--ipcloak-text-muted);
  font-size: 1.05rem;
  max-width: 720px;
}

/* ----- 工具结果卡 ----- */
.tool-result {
  background: linear-gradient(135deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  backdrop-filter: blur(24px);
  border: 1px solid var(--ipcloak-border);
  border-radius: var(--ipcloak-radius-lg);
  padding: 2rem;
  margin: 2rem 0;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
@media (max-width: 700px) { .result-grid { grid-template-columns: 1fr; } }

.result-item {
  padding: 1rem 1.25rem;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--ipcloak-border);
  border-radius: var(--ipcloak-radius);
}
.result-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ipcloak-text-muted);
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-family: var(--ipcloak-font-display);
}
.result-value {
  font-family: var(--ipcloak-font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ipcloak-text);
  word-break: break-all;
}
.result-value.large {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ipcloak-cyan);
  letter-spacing: -0.02em;
}

/* 状态药丸 */
.result-pill {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  border-radius: var(--ipcloak-radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--ipcloak-font-mono);
  border: 1px solid;
}
.result-pill.ok    { background: rgba(22,163,74,0.1);  color: #4ade80; border-color: rgba(22,163,74,0.3); }
.result-pill.warn  { background: rgba(245,158,11,0.1); color: #fbbf24; border-color: rgba(245,158,11,0.3); }
.result-pill.bad   { background: rgba(239,68,68,0.1);  color: #f87171; border-color: rgba(239,68,68,0.3); }

/* 输入区 */
.input-row {
  display: flex;
  gap: 0.75rem;
  margin: 1rem 0;
}
.input-row input, .input-row textarea {
  flex: 1;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--ipcloak-border-strong);
  border-radius: var(--ipcloak-radius);
  font-family: var(--ipcloak-font-mono);
  font-size: 0.92rem;
  color: var(--ipcloak-text);
}
.input-row input::placeholder { color: var(--ipcloak-text-subtle); }
.input-row input:focus, .input-row textarea:focus {
  outline: none;
  border-color: var(--ipcloak-cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

/* 代码块 */
.code-block {
  background: rgba(0,0,0,0.5);
  color: #e2e8f0;
  border: 1px solid var(--ipcloak-border);
  border-radius: var(--ipcloak-radius);
  padding: 1.25rem;
  font-family: var(--ipcloak-font-mono);
  font-size: 0.85rem;
  overflow-x: auto;
  line-height: 1.7;
  margin: 1.5rem 0;
}
.code-block .key { color: #60a5fa; }
.code-block .str { color: #86efac; }
.code-block .num { color: #fbbf24; }
.code-block .com { color: #64748b; font-style: italic; }

/* 工具介绍正文 */
.tool-article {
  max-width: 820px;
  margin: 0 auto;
  padding: 3rem 0;
}
.tool-article h2 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--ipcloak-border);
}
.tool-article p { margin: 1rem 0; line-height: 1.7; }
.tool-article ul { margin: 1rem 0 1rem 1.5rem; }
.tool-article li { margin: 0.4rem 0; }
.tool-article code {
  font-family: var(--ipcloak-font-mono);
  background: rgba(255,255,255,0.05);
  padding: 2px 6px;
  border-radius: var(--ipcloak-radius-sm);
  font-size: 0.9em;
}