:root, [data-theme="dark"] {
  --bg: #0a0a0a;
  --panel-bg: #121212;
  --border: #262626;
  --text: #ededed;
  --text-muted: #a3a3a3;
  --btn-bg: #1f1f1f;
  --btn-hover: #2e2e2e;
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 4px;
}

[data-theme="light"] {
  --bg: #ffffff;
  --panel-bg: #f5f5f5;
  --border: #e5e5e5;
  --text: #171717;
  --text-muted: #737373;
  --btn-bg: #e5e5e5;
  --btn-hover: #d4d4d4;
  --success: #16a34a;
  --danger: #dc2626;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

body {
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.5;
  padding: 40px 20px;
  display: flex;
  justify-content: center;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.app-container {
  width: 100%;
  max-width: 620px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Header */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle-btn {
  background: var(--panel-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 10px;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle-btn:hover {
  background: var(--btn-hover);
}

.lang-select {
  background: var(--panel-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 8px;
  font-size: 0.8rem;
  outline: none;
  cursor: pointer;
}

/* Main Box */
.main-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-bg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-header h1 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.hero-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Search Form */
.search-form {
  display: flex;
  gap: 8px;
}

.search-form input {
  flex: 1;
  padding: 10px 12px;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  outline: none;
}

.search-form input:focus {
  border-color: var(--text-muted);
}

.btn {
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
}

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

/* Quick Chips */
.chips-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.chip {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 2px 8px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.78rem;
}

.chip:hover {
  border-color: var(--text-muted);
}

/* Result Card */
.result-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.status-tag {
  font-weight: 700;
  font-size: 0.85rem;
  padding: 2px 8px;
  border-radius: var(--radius);
}

.status-tag.up {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  border: 1px solid var(--success);
}

.status-tag.down {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid var(--danger);
}

.target-url {
  font-weight: 700;
  font-size: 0.95rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.metric-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.metric-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.metric-val {
  font-size: 0.9rem;
  font-weight: 600;
}

/* AdSense */
.ads-container {
  width: 100%;
  min-height: 90px;
  background: var(--panel-bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* History */
.history-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-bg);
  overflow: hidden;
}

.history-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 0.88rem;
}

.history-list {
  display: flex;
  flex-direction: column;
}

.history-row {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  cursor: pointer;
}

.history-row:last-child {
  border-bottom: none;
}

.history-row:hover {
  background: var(--bg);
}

.footer {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 15px 0;
  border-top: 1px solid var(--border);
}