:root {
  --primary-color: #3b82f6;
  --primary-dark: #1d4ed8;

  --bg-color: #f9fcff;
  --bg-image: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0, rgba(118, 75, 162, 0.08) 100%);
  --text-color: #1a202c;
  --text-secondary: #6b7280;

  --glass-bg: rgba(255, 255, 255, 0.5);
  --glass-bg-hover: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-border-bottom: rgba(0, 0, 0, 0.05);
  --glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  --glass-inner-light: inset 0 0 0 1px rgba(0, 0, 0, 0.05);

  --surface-soft: rgba(255, 255, 255, 0.35);
  --surface-strong: rgba(255, 255, 255, 0.6);
  --chip-bg: rgba(0, 0, 0, 0.05);
  --hairline: rgba(0, 0, 0, 0.05);

  --input-bg: #ffffff;
  --input-border: #e5e7eb;
  --blur-amount: 20px;

  --focus-ring: 0 0 0 4px rgba(59, 130, 246, 0.1);

  --color-a: rgba(59, 130, 246, 0.12);
  --color-aaaa: rgba(34, 197, 94, 0.12);
  --color-cname: rgba(168, 85, 247, 0.12);
  --color-ns: rgba(245, 158, 11, 0.14);
  --color-soa: rgba(239, 68, 68, 0.12);
  --color-other: rgba(107, 114, 128, 0.12);

  --type-a: #3b82f6;
  --type-aaaa: #16a34a;
  --type-cname: #9333ea;
  --type-ns: #d97706;
  --type-soa: #dc2626;
  --type-other: #6b7280;
}

.dark-mode {
  --bg-color: #121212;
  --bg-image: linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0, rgba(255, 255, 255, 0.02) 100%);
  --text-color: #f1f5f9;
  --text-secondary: #94a3b8;

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-hover: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-bottom: rgba(0, 0, 0, 0.4);
  --glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  --glass-inner-light: inset 0 0 0 1px rgba(255, 255, 255, 0.06);

  --surface-soft: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --chip-bg: rgba(255, 255, 255, 0.06);
  --hairline: rgba(255, 255, 255, 0.06);

  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.12);

  --focus-ring: 0 0 0 4px rgba(59, 130, 246, 0.2);

  --color-a: rgba(96, 165, 250, 0.2);
  --color-aaaa: rgba(74, 222, 128, 0.2);
  --color-cname: rgba(192, 132, 252, 0.2);
  --color-ns: rgba(251, 191, 36, 0.2);
  --color-soa: rgba(248, 113, 113, 0.2);
  --color-other: rgba(148, 163, 184, 0.2);

  --type-a: #60a5fa;
  --type-aaaa: #4ade80;
  --type-cname: #c084fc;
  --type-ns: #fbbf24;
  --type-soa: #f87171;
  --type-other: #94a3b8;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  line-height: 1.5;
  background-color: var(--bg-color);
  background-image: var(--bg-image);
  background-attachment: fixed;
  color: var(--text-color);
  padding: 40px 20px;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.glass-panel {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--blur-amount)) saturate(180%);
  backdrop-filter: blur(var(--blur-amount)) saturate(180%);
  border-radius: 24px;
  border: 1.5px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-inner-light);
  padding: 40px;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.header-area {
  margin-bottom: 30px;
}

h1 {
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.5px;
  color: var(--text-color);
}

.subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
}

.glass-card {
  background: var(--surface-soft);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: 18px;
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04), inset 0 0 0 1px var(--hairline);
  margin-bottom: 24px;
  transition: all 0.3s ease;
}

.dark-mode .glass-card {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), inset 0 0 0 1px var(--hairline);
}

.card-header {
  background: transparent;
  font-weight: 600;
  font-size: 17px;
  padding: 20px 24px 0;
  border-bottom: none;
  color: var(--text-color);
}

.card-body {
  padding: 20px 24px 24px;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  margin-left: 2px;
  letter-spacing: 0.3px;
}

.glass-input {
  background: var(--input-bg);
  border: 2px solid var(--input-border);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 15px;
  color: var(--text-color);
  transition: all 0.3s ease;
  -webkit-appearance: none;
  appearance: none;
  font-family: inherit;
}

.glass-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.glass-input:focus {
  background: var(--input-bg);
  border-color: var(--primary-color);
  box-shadow: var(--focus-ring);
  outline: none;
}

.dark-mode .glass-input {
  color-scheme: dark;
}

.input-group.glass-input-group {
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid var(--input-border);
  background: var(--input-bg);
  transition: all 0.3s ease;
}

.input-group.glass-input-group:focus-within {
  border-color: var(--primary-color);
  box-shadow: var(--focus-ring);
}

.input-group.glass-input-group .glass-input {
  border: none;
  background: transparent;
  box-shadow: none;
}

.input-group.glass-input-group .glass-input:focus {
  border: none;
  box-shadow: none;
}

.btn {
  border-radius: 12px;
  padding: 15px 20px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: all 0.3s ease;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-glass-primary {
  background: linear-gradient(135deg, #3b82f6 0, #1d4ed8 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-glass-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(59, 130, 246, 0.4);
}

.btn-glass-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(59, 130, 246, 0.3);
}

.btn-glass-secondary {
  background: var(--glass-bg);
  color: var(--primary-color);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1.5px solid var(--glass-border);
  box-shadow: var(--glass-inner-light);
}

.btn-glass-secondary:hover {
  background: var(--glass-bg-hover);
}

.btn-glass-outline {
  background: transparent;
  color: var(--primary-color);
  border-radius: 0 12px 12px 0;
  padding: 14px 20px;
}

.btn-glass-outline:hover {
  background: rgba(59, 130, 246, 0.08);
}

.btn-glass-icon {
  background: var(--glass-bg);
  border: 1.5px solid var(--glass-border);
  box-shadow: var(--glass-inner-light);
  padding: 14px;
  width: 52px;
  color: var(--text-color);
  font-size: 18px;
}

.btn-glass-icon:hover {
  background: var(--glass-bg-hover);
}

.segmented-control {
  display: flex;
  background: var(--chip-bg);
  padding: 4px;
  border-radius: 12px;
  position: relative;
}

.segmented-item {
  flex: 1;
  background: transparent;
  border: none;
  padding: 10px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
  font-family: inherit;
}

.segmented-item.active {
  background: var(--input-bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  color: var(--text-color);
  font-weight: 600;
}

.dark-mode .segmented-item.active {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.segmented-item:not(.active):hover {
  color: var(--primary-color);
}

.glass-tab-content {
  background: transparent;
  padding: 20px 0 0;
  border: none;
}

.result-summary {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-left: 2px;
}

.ip-record {
  display: table;
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: 12px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface-strong);
  border: 1px solid var(--glass-border);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04), inset 0 0 0 1px var(--hairline);
  contain: layout style;
  transition: all 0.3s ease;
}

.dark-mode .ip-record {
  background: var(--surface-soft);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3), inset 0 0 0 1px var(--hairline);
}

.ip-record-row { display: table-row; }

.ip-record-cell {
  display: table-cell;
  padding: 12px 16px;
  vertical-align: middle;
  border-bottom: 1px solid var(--hairline);
  color: var(--text-color);
  font-size: 14px;
}

.ip-record-cell:first-child {
  width: 30%;
  font-weight: 500;
  color: var(--text-secondary);
}

.ip-record-cell:last-child { width: 70%; }

.ip-record-row:last-child .ip-record-cell { border-bottom: none; }

.ip-address {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, monospace;
  font-weight: 500;
  color: var(--primary-color);
  cursor: pointer;
  position: relative;
  display: inline-block;
  transition: opacity 0.2s ease;
}

.ip-address:hover { opacity: 0.7; }

.ip-address:after {
  content: '';
  position: absolute;
  left: 100%;
  top: 0;
  margin-left: 8px;
  opacity: 0;
  white-space: nowrap;
  font-size: 12px;
  color: var(--text-secondary);
  transition: opacity 0.2s ease;
  font-family: -apple-system, sans-serif;
}

.ip-address.copied:after { content: '已复制'; opacity: 1; }

.geo-country {
  display: inline-block;
  padding: 2px 8px;
  background: var(--chip-bg);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
}

.geo-as {
  color: var(--text-secondary);
  font-size: 13px;
}

.geo-loading {
  color: var(--text-secondary);
  font-style: italic;
  font-size: 13px;
}

.geo-blocked {
  background: var(--type-soa);
  color: white;
  padding: 2px 8px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 12px;
  display: inline-block;
}

.record-type {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 6px;
  display: inline-block;
}

.type-a { color: var(--type-a); background: var(--color-a); }
.type-aaaa { color: var(--type-aaaa); background: var(--color-aaaa); }
.type-cname { color: var(--type-cname); background: var(--color-cname); }
.type-ns { color: var(--type-ns); background: var(--color-ns); }
.type-soa { color: var(--type-soa); background: var(--color-soa); }
.type-other { color: var(--type-other); background: var(--color-other); }

.ttl-info {
  font-size: 13px;
  color: var(--text-secondary);
}

.glass-pre {
  background: rgba(15, 23, 42, 0.85);
  color: #e2e8f0;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  font-family: "SF Mono", ui-monospace, monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 400px;
  overflow: auto;
}

.dark-mode .glass-pre {
  background: rgba(0, 0, 0, 0.5);
  border-color: rgba(255, 255, 255, 0.08);
}

.glass-error {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 12px;
  padding: 14px 18px;
  color: #c53030;
  font-size: 14px;
  font-weight: 500;
  word-break: break-all;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  animation: fadeInError 0.3s ease-out;
}

.dark-mode .glass-error {
  color: #f87171;
}

.error-message {
  margin: 0;
  white-space: pre-wrap;
  font-family: inherit;
}

.loading {
  display: none;
  text-align: center;
  padding: 40px 0;
}

.loading-spinner {
  border: 3px solid rgba(59, 130, 246, 0.15);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

.loading-text {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

.glass-footer {
  text-align: center;
  padding: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  border-radius: 18px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inner-light);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.glass-footer p {
  margin: 0 0 4px;
}

.small-text {
  font-size: 12px;
  opacity: 0.8;
}

.copy-link {
  color: var(--primary-color);
  cursor: pointer;
  font-family: "SF Mono", monospace;
  position: relative;
  display: inline-block;
  padding: 2px 6px;
  border-radius: 6px;
  transition: background 0.2s ease;
}

.copy-link:hover {
  background: var(--chip-bg);
}

.copy-link:after {
  content: '已复制';
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-color);
  color: var(--bg-color);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.2s;
  font-family: -apple-system, sans-serif;
  pointer-events: none;
}

.copy-link.copied:after {
  opacity: 1;
}

@media (max-width: 576px) {
  body {
    padding: 20px 12px;
  }
  .glass-panel {
    padding: 28px 20px;
    border-radius: 20px;
  }
  h1 {
    font-size: 26px;
  }
  .card-body {
    padding: 16px;
  }
  .ip-record-cell {
    padding: 10px 12px;
  }
  .ip-record-cell:first-child {
    width: 35%;
  }
  .ip-record-cell:last-child {
    width: 65%;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}