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

:root {
  --bg: #0f1115;
  --card-bg: #1a1d24;
  --border: #2a2e38;
  --accent: #ff9f40;
  --text: #e8e8e8;
  --muted: #9aa0aa;
}

:root[data-theme="light"] {
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --border: #e2e4e9;
  --accent: #d97706;
  --text: #1a1d24;
  --muted: #666b76;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f5f6f8;
    --card-bg: #ffffff;
    --border: #e2e4e9;
    --accent: #d97706;
    --text: #1a1d24;
    --muted: #666b76;
  }
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: background 0.2s, color 0.2s;
}

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-toggle {
  position: fixed;
  top: 1rem;
  left: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  z-index: 40;
}

.menu-toggle .bar {
  width: 1.1rem;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle.open .bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle.open .bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.open .bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 25;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.nav-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.nav-menu {
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 260px;
  max-width: 80vw;
  background: var(--card-bg);
  border-right: 1px solid var(--border);
  padding: 4.5rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 30;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  transform: translateX(-100%);
  transition: transform 0.25s ease;
}

.nav-menu.open {
  transform: translateX(0);
}

.nav-menu a {
  color: var(--text);
  text-decoration: none;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  font-size: 0.95rem;
}

.nav-menu a:hover {
  background: var(--bg);
  color: var(--accent);
}

header {
  text-align: center;
  padding: 3rem 1rem 1.5rem;
}

header h1 {
  font-size: 2.25rem;
}

.tagline {
  color: var(--muted);
  margin-top: 0.5rem;
}

main {
  width: 100%;
  max-width: 480px;
  padding: 0 1rem;
  flex: 1;
}

.ip-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.label {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.ip-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.ip-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  word-break: break-all;
}


.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 6px;
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.copy-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.copy-btn.copied {
  color: #22c55e;
  border-color: #22c55e;
}

.details {
  margin-top: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

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

.key {
  color: var(--muted);
  flex-shrink: 0;
}

.val {
  text-align: right;
  word-break: break-word;
}

main.wide {
  max-width: 640px;
}

.section-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 1.5rem 0 0.5rem;
}

.tool-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tool-form input,
.tool-form select {
  flex: 1;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

.tool-form button {
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
}

.tool-form button:hover {
  opacity: 0.9;
}

.tool-error {
  color: #ef4444;
  font-size: 0.85rem;
  margin: -0.25rem 0 1rem;
}

.tool-note {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 0.5rem;
  text-align: center;
}

.raw-toggle-btn {
  margin-top: 1rem;
  width: 100%;
  padding: 0.5rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
}

.raw-toggle-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.raw-json {
  margin-top: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  font-size: 0.8rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.result-table-wrap {
  overflow-x: auto;
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.result-table th,
.result-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

.result-table th {
  color: var(--muted);
  font-weight: 600;
}

.result-table tr:last-child td {
  border-bottom: none;
}

.conn-info {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 1.5rem;
}

.conn-sep {
  margin: 0 0.4rem;
}

.gauge-wrap {
  position: relative;
  width: 260px;
  height: 260px;
  margin: 0 auto;
}

.gauge-face {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border);
}

.gauge-pivot {
  position: absolute;
  top: 130px;
  left: 130px;
  width: 0;
  height: 0;
}

.gauge-tick-mark {
  position: absolute;
  left: -1px;
  top: -128px;
  width: 2px;
  height: 10px;
  background: var(--muted);
  border-radius: 1px;
}

.gauge-tick-mark.major {
  left: -1.5px;
  width: 3px;
  height: 14px;
  background: var(--text);
}

.gauge-needle-shaft {
  position: absolute;
  left: -2px;
  top: -100px;
  width: 4px;
  height: 100px;
  background: var(--accent);
  border-radius: 2px 2px 0 0;
}

.gauge-hub {
  position: absolute;
  top: 123px;
  left: 123px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  z-index: 2;
}

.gauge-center {
  position: absolute;
  top: 62%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 3;
}

.go-btn {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #14151a;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.go-btn:hover {
  filter: brightness(1.08);
}

.go-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.live-reading {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.live-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}

.live-unit {
  color: var(--muted);
  font-size: 0.8rem;
}

.live-phase {
  margin-top: 0.35rem;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.stat-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.stat-box {
  flex: 1;
  min-width: 120px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.stat-box-label {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-box-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.stat-box-unit {
  color: var(--muted);
  font-size: 0.7rem;
}

footer {
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}