:root {
  --bg: #0a0f1f;
  --bg-soft: rgba(255, 255, 255, 0.05);
  --panel: rgba(255, 255, 255, 0.08);
  --text: #edf4ff;
  --muted: #a1b0cf;
  --border: rgba(255, 255, 255, 0.12);
  --accent: #73a9ff;
  --accent-2: #62e8c8;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

body.light {
  --bg: #f4f8ff;
  --bg-soft: rgba(255, 255, 255, 0.88);
  --panel: rgba(255, 255, 255, 0.9);
  --text: #132033;
  --muted: #5c6b83;
  --border: rgba(19, 32, 51, 0.08);
  --accent: #2d6df0;
  --accent-2: #08b894;
  --shadow: 0 12px 32px rgba(30, 50, 80, 0.12);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #111932 0%, var(--bg) 45%);
  min-height: 100vh;
  transition: background .3s ease, color .3s ease;
}

body.light {
  background: linear-gradient(180deg, #edf4ff 0%, #f8fbff 100%);
}

.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 20%, rgba(115, 169, 255, 0.16), transparent 30%),
    radial-gradient(circle at 80% 10%, rgba(98, 232, 200, 0.12), transparent 26%);
}

.hero, .container, .footer, .nav, .hero-content {
  max-width: 1160px;
  margin: 0 auto;
}

.hero {
  padding: 24px 20px 0;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .4px;
}

.theme-btn,
button {
  border: 1px solid var(--border);
  background: linear-gradient(135deg, var(--accent), #4b82ff);
  color: #fff;
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 14px;
}

button {
  transition: transform .2s ease, opacity .2s ease, border-color .2s ease;
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  opacity: .65;
  cursor: not-allowed;
}

button.secondary {
  background: linear-gradient(135deg, #22b8cf, #168aad);
}

button.ghost,
.theme-btn {
  background: var(--panel);
  color: var(--text);
}

.hero-content {
  padding: 54px 0 24px;
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--accent-2);
  font-size: 14px;
}

h1 {
  margin: 18px 0 14px;
  font-size: clamp(34px, 6vw, 58px);
  line-height: 1.08;
}

.subtitle {
  color: var(--muted);
  max-width: 780px;
  line-height: 1.7;
  font-size: 18px;
}

.status-row {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.quick-nav {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.quick-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
}

.quick-nav-link:hover {
  transform: translateY(-1px);
  border-color: rgba(115, 169, 255, 0.34);
}

.quick-nav-link.active {
  background: linear-gradient(135deg, var(--accent), #4b82ff);
  color: #fff;
  border-color: transparent;
}

.status-card,
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.status-card {
  padding: 18px;
}

.label {
  display: block;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 8px;
}

.value {
  font-size: 18px;
  font-weight: 600;
}

.container {
  padding: 20px;
}

.panel {
  padding: 20px;
}

.search-panel {
  margin-top: 12px;
}

.search-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.search-top h2,
.tool-panel h2 {
  margin: 0;
  font-size: 24px;
}

#searchInput,
textarea,
input[type="text"],
input[type="datetime-local"] {
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
  border-radius: 14px;
  padding: 14px 16px;
  outline: none;
  font-size: 15px;
}

input[readonly] {
  margin-top: 12px;
}

.search-top input {
  max-width: 360px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.tool-card {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  transition: transform .2s ease, border-color .2s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: rgba(115, 169, 255, 0.34);
}

.tool-card h3 {
  margin: 0 0 10px;
}

.tool-card p {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.6;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-tags span {
  background: rgba(115, 169, 255, .14);
  color: var(--accent);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
}

.tools-layout {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

textarea {
  min-height: 180px;
  resize: vertical;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 14px;
}

label {
  display: block;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 8px;
}

.result-box {
  min-height: 60px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  white-space: pre-wrap;
  line-height: 1.6;
}

.empty-state,
.footer {
  color: var(--muted);
  text-align: center;
}

.hidden {
  display: none;
}

.footer {
  padding: 40px 20px 50px;
}

.tool-card-link {
  display: inline-flex;
  align-items: center;
  color: var(--accent-2);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.tool-card-link:hover {
  text-decoration: underline;
}

.tool-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.tool-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.copy-btn {
  white-space: nowrap;
}

.input-error {
  border-color: #ff7b7b !important;
  box-shadow: 0 0 0 3px rgba(255, 123, 123, 0.12);
}

.toast {
  position: sticky;
  bottom: 20px;
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(19, 32, 51, 0.9);
  color: #fff;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.12);
}

body.light .toast {
  background: rgba(19, 32, 51, 0.82);
}

html {
  scroll-behavior: smooth;
}

.tool-panel {
  scroll-margin-top: 90px;
}

@media (max-width: 900px) {
  .tool-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .tool-actions {
    width: 100%;
  }
}

@media (max-width: 900px) {
  .status-row,
  .tool-grid,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .search-top {
    flex-direction: column;
    align-items: stretch;
  }

  .search-top input {
    max-width: none;
  }
}