/* ============ Theme tokens ============ */
:root {
  --grad-1: #7c3aed;
  --grad-2: #06b6d4;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 10px 30px -10px rgba(0,0,0,.25), 0 4px 12px -4px rgba(0,0,0,.15);
  --transition: 200ms cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
  --bg: #0b0b13;
  --bg-soft: #11111c;
  --bg-elev: #161624;
  --border: rgba(255,255,255,.08);
  --border-strong: rgba(255,255,255,.14);
  --text: #ececf1;
  --text-dim: #a1a1aa;
  --text-mute: #6b6b78;
  --accent: #7c3aed;
  --accent-2: #06b6d4;
  --danger: #f43f5e;
  --success: #10b981;
  --input-bg: rgba(255,255,255,.04);
  --input-bg-focus: rgba(255,255,255,.07);
  --orb-opacity: .35;
}

[data-theme="light"] {
  --bg: #f7f7fb;
  --bg-soft: #ffffff;
  --bg-elev: #ffffff;
  --border: rgba(0,0,0,.08);
  --border-strong: rgba(0,0,0,.14);
  --text: #18181b;
  --text-dim: #52525b;
  --text-mute: #a1a1aa;
  --accent: #7c3aed;
  --accent-2: #06b6d4;
  --danger: #e11d48;
  --success: #059669;
  --input-bg: rgba(0,0,0,.03);
  --input-bg-focus: rgba(0,0,0,.05);
  --orb-opacity: .25;
}

/* ============ Base ============ */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }

/* ============ Background orbs ============ */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: var(--orb-opacity);
  will-change: transform;
}
.orb-1 {
  width: 480px; height: 480px;
  background: radial-gradient(circle, #7c3aed 0%, transparent 70%);
  top: -120px; left: -120px;
  animation: float1 20s ease-in-out infinite;
}
.orb-2 {
  width: 380px; height: 380px;
  background: radial-gradient(circle, #06b6d4 0%, transparent 70%);
  top: 30%; right: -100px;
  animation: float2 25s ease-in-out infinite;
}
.orb-3 {
  width: 360px; height: 360px;
  background: radial-gradient(circle, #f43f5e 0%, transparent 70%);
  bottom: -100px; left: 30%;
  animation: float3 22s ease-in-out infinite;
}
@keyframes float1 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(80px, 60px); } }
@keyframes float2 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-60px, 80px); } }
@keyframes float3 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(60px, -60px); } }

/* ============ Header ============ */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  max-width: 1200px;
  margin: 0 auto;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px;
  letter-spacing: -.01em;
}
.brand-mark {
  display: inline-flex;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px -4px rgba(124,58,237,.5);
}
.header-actions { display: flex; align-items: center; gap: 8px; }
.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 14px;
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover { color: var(--text); background: var(--input-bg); }
.icon-btn {
  background: var(--input-bg);
  border: 1px solid var(--border);
  width: 36px; height: 36px;
  border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-dim);
  transition: all var(--transition);
}
.icon-btn:hover { color: var(--text); background: var(--input-bg-focus); border-color: var(--border-strong); }
[data-theme="dark"] .i-sun { display: none; }
[data-theme="light"] .i-moon { display: none; }

/* Language switcher */
.lang-switch { position: relative; }
.lang-btn {
  background: var(--input-bg);
  border: 1px solid var(--border);
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}
.lang-btn:hover { color: var(--text); background: var(--input-bg-focus); border-color: var(--border-strong); }
.lang-btn[aria-expanded="true"] { border-color: var(--accent); color: var(--text); }
.lang-flag { font-size: 14px; line-height: 1; }
.lang-short { letter-spacing: .02em; }
.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 180px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  box-shadow: 0 12px 30px -10px rgba(0,0,0,.45);
  padding: 6px;
  display: none;
  z-index: 100;
}
.lang-menu.open { display: block; animation: menuIn .15s ease-out; }
@keyframes menuIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
.lang-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 8px 10px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 13px;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition);
}
.lang-item:hover { background: var(--input-bg-focus); }
.lang-item.active { color: var(--accent); }
.lang-item.active svg { margin-left: auto; color: var(--accent); }
.lang-name { flex: 1; }

/* ============ Container ============ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 32px 80px;
}

/* ============ Hero ============ */
.hero { text-align: center; padding: 36px 0 28px; }
.hero-title {
  font-size: clamp(28px, 4.5vw, 48px);
  margin: 0 0 12px;
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.15;
}
.grad-text {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 16px;
  color: var(--text-dim);
  margin: 0;
}

/* ============ Card ============ */
.card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.input-card { padding: 18px; }

/* Quick chips */
.quick-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.quick-label {
  font-size: 12px;
  color: var(--text-mute);
  margin-right: 4px;
}
.chip {
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12px;
  transition: all var(--transition);
}
.chip:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--input-bg-focus);
  transform: translateY(-1px);
}

/* ============ Input ============ */
.input-row {
  display: flex; gap: 10px;
  align-items: stretch;
}
.input-wrap {
  flex: 1;
  position: relative;
  display: flex; align-items: center;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.input-wrap:focus-within {
  border-color: var(--accent);
  background: var(--input-bg-focus);
  box-shadow: 0 0 0 4px rgba(124,58,237,.15);
}
.input-icon {
  display: inline-flex; align-items: center; justify-content: center;
  padding-left: 14px;
  color: var(--text-mute);
}
#domainInput {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 14px 12px;
  font-size: 15px;
  color: var(--text);
  min-width: 0;
}
#domainInput::placeholder { color: var(--text-mute); }
.clear-btn {
  background: transparent;
  border: none;
  padding: 0 12px;
  color: var(--text-mute);
  display: inline-flex; align-items: center;
  transition: color var(--transition);
}
.clear-btn:hover { color: var(--text); }
.clear-btn[hidden] { display: none; }

.primary-btn {
  position: relative;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  border: none;
  padding: 0 24px;
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-md);
  min-width: 130px;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  box-shadow: 0 6px 18px -6px rgba(124,58,237,.5);
}
.primary-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px -6px rgba(124,58,237,.6); }
.primary-btn:active { transform: translateY(0); }
.primary-btn:disabled { opacity: .7; cursor: not-allowed; transform: none; }
.btn-spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  display: none;
  animation: spin .8s linear infinite;
}
.primary-btn.loading .btn-spinner { display: inline-block; }
.primary-btn.loading .btn-text { opacity: .6; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ Options ============ */
.opts {
  display: flex; align-items: center; gap: 16px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
  flex-wrap: wrap;
}
.opt-group { display: flex; align-items: center; gap: 8px; }
.opt-label { font-size: 13px; color: var(--text-dim); }
.opt-select {
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color var(--transition);
}
.opt-select:hover { border-color: var(--border-strong); }
.opt-select:focus { outline: none; border-color: var(--accent); }
.opt-spacer { flex: 1; }

/* Switch */
.switch {
  display: inline-flex; align-items: center; gap: 8px;
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  color: var(--text-dim);
}
.switch input { display: none; }
.switch-slider {
  width: 32px; height: 18px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  position: relative;
  transition: background var(--transition);
}
.switch-slider::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 12px; height: 12px;
  background: var(--text-dim);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}
.switch input:checked + .switch-slider {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  border-color: transparent;
}
.switch input:checked + .switch-slider::after {
  transform: translateX(14px);
  background: #fff;
}

/* ============ Result section ============ */
.result-section, .history-section { margin-top: 36px; }
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}
.section-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.section-actions { display: flex; gap: 8px; }
.ghost-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 13px;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all var(--transition);
}
.ghost-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--input-bg); }
.ghost-btn.danger:hover { color: var(--danger); border-color: var(--danger); }

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

/* Result card */
.result-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: all var(--transition);
  position: relative;
  animation: cardIn .35s cubic-bezier(.4,0,.2,1) backwards;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.result-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.result-card.error { border-style: dashed; }
.result-card.error .icon-frame { background: var(--input-bg); }

.icon-frame {
  width: 100%;
  aspect-ratio: 1;
  background:
    linear-gradient(45deg, var(--input-bg) 25%, transparent 25%),
    linear-gradient(-45deg, var(--input-bg) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--input-bg) 75%),
    linear-gradient(-45deg, transparent 75%, var(--input-bg) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
}
.icon-frame img {
  max-width: 70%;
  max-height: 70%;
  object-fit: contain;
  image-rendering: -webkit-optimize-contrast;
}
.icon-frame img.large { max-width: 100%; max-height: 100%; }
.icon-frame .placeholder {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-mute);
  text-transform: uppercase;
}
.icon-frame .error-mark {
  font-size: 13px;
  color: var(--text-mute);
  text-align: center;
  padding: 0 12px;
}
.icon-frame .loading-mark {
  width: 28px; height: 28px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

.card-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
  gap: 8px;
}
.card-domain {
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}
.card-source {
  font-size: 11px;
  color: var(--text-mute);
  background: var(--input-bg);
  padding: 2px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}
.card-meta {
  display: flex; gap: 12px;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.card-meta span { display: inline-flex; align-items: center; gap: 4px; }

.card-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.action-btn {
  flex: 1;
  min-width: 60px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 7px 8px;
  border-radius: 6px;
  font-size: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 4px;
  transition: all var(--transition);
}
.action-btn:hover {
  color: var(--text);
  background: var(--input-bg-focus);
  border-color: var(--border-strong);
}
.action-btn.primary {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  border-color: transparent;
}
.action-btn.primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px -4px rgba(124,58,237,.5); }

/* ============ Features ============ */
.features {
  margin-top: 60px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.feature {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  transition: all var(--transition);
}
.feature:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.feature h3 { margin: 12px 0 6px; font-size: 16px; font-weight: 700; }
.feature p { margin: 0; font-size: 14px; color: var(--text-dim); line-height: 1.6; }
.feature-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--c1, var(--grad-1)), var(--c2, var(--grad-2)));
  box-shadow: 0 6px 18px -6px rgba(124,58,237,.5);
}

/* ============ Footer ============ */
.site-footer {
  text-align: center;
  padding: 32px 16px 40px;
  color: var(--text-mute);
  font-size: 13px;
  border-top: 1px solid var(--border);
  margin-top: 60px;
}
.friend-links {
  max-width: 1000px;
  margin: 0 auto 20px;
  padding: 0 16px;
}
.friend-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
  margin: 0 0 14px;
  letter-spacing: .04em;
  text-transform: uppercase;
  position: relative;
  display: inline-block;
}
.friend-title::before,
.friend-title::after {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--border-strong);
  vertical-align: middle;
  margin: 0 12px;
}
.friend-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 10px;
}
.friend-list li { display: inline-block; }
.friend-list a {
  display: inline-block;
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  background: var(--input-bg);
  transition: all var(--transition);
}
.friend-list a:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--input-bg-focus);
  transform: translateY(-1px);
}
.footer-line { margin: 6px 0; }
.footer-meta a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px dashed var(--border-strong);
  transition: color var(--transition);
}
.footer-meta a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ============ Toast ============ */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  box-shadow: 0 10px 30px -10px rgba(0,0,0,.4);
  opacity: 0;
  pointer-events: none;
  transition: all .3s cubic-bezier(.4,0,.2,1);
  z-index: 1000;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error { border-color: var(--danger); }
.toast.success { border-color: var(--success); }

/* ============ Responsive ============ */
@media (max-width: 640px) {
  .site-header { padding: 16px 18px; }
  .container { padding: 16px 18px 60px; }
  .input-row { flex-direction: column; }
  .primary-btn { min-height: 46px; }
  .opts { gap: 10px; }
  .opt-spacer { display: none; }
  .result-grid { grid-template-columns: 1fr; }
  .hero { padding: 18px 0 22px; }
}