:root,
[data-theme="light"] {
  --bg: #f6f7f4;
  --surface: rgba(255,255,255,0.72);
  --surface-strong: #ffffff;
  --text: #1a1f1c;
  --muted: #6b756e;
  --border: rgba(26,31,28,0.10);
  --primary: #0f766e;
  --primary-hover: #0b5d57;
  --primary-soft: rgba(15,118,110,0.12);
  --accent: #34d399;
  --shadow: 0 24px 70px rgba(15,40,30,0.10);
  --hero-1: rgba(15,118,110,0.16);
  --hero-2: rgba(52,211,153,0.10);
}

[data-theme="dark"] {
  --bg: #0d1410;
  --surface: rgba(20,28,24,0.74);
  --surface-strong: #141c18;
  --text: #eef2ee;
  --muted: #95a59b;
  --border: rgba(255,255,255,0.09);
  --primary: #34d399;
  --primary-hover: #6ee7b7;
  --primary-soft: rgba(52,211,153,0.14);
  --accent: #4fd1c5;
  --shadow: 0 24px 70px rgba(0,0,0,0.40);
  --hero-1: rgba(52,211,153,0.15);
  --hero-2: rgba(79,209,197,0.10);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0d1410;
    --surface: rgba(20,28,24,0.74);
    --surface-strong: #141c18;
    --text: #eef2ee;
    --muted: #95a59b;
    --border: rgba(255,255,255,0.09);
    --primary: #34d399;
    --primary-hover: #6ee7b7;
    --primary-soft: rgba(52,211,153,0.14);
    --accent: #4fd1c5;
    --shadow: 0 24px 70px rgba(0,0,0,0.40);
    --hero-1: rgba(52,211,153,0.15);
    --hero-2: rgba(79,209,197,0.10);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", sans-serif;
  background:
    radial-gradient(circle at top left, var(--hero-1), transparent 38%),
    radial-gradient(circle at bottom right, var(--hero-2), transparent 32%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a, button {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 10px;
  background: var(--surface-strong);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  z-index: 100;
}

.skip-link:focus {
  left: 10px;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 20px;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 60%, var(--accent)));
  color: white;
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

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

.nav a,
.theme-btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 14px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid transparent;
  transition: 0.2s ease;
  background: transparent;
  cursor: pointer;
  font-weight: 500;
}

.nav a:hover,
.theme-btn:hover {
  background: var(--surface);
  border-color: var(--border);
}

.hero {
  padding: 64px 0 32px;
}

.hero-head {
  text-align: center;
  margin-bottom: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid color-mix(in srgb, var(--primary) 24%, transparent);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
}

.badge svg {
  width: 16px;
  height: 16px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 900;
}

.hero h1 .accent {
  color: var(--primary);
}

.lead {
  margin: 0 auto;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--muted);
  max-width: 60ch;
}

.ip-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 720px;
  margin: 0 auto;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.ip-card {
  padding: clamp(22px, 3vw, 36px);
}

.ip-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.ip-info {
  flex: 1 1 auto;
  min-width: 0;
}

.ip-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 12px;
}

.ip-label svg {
  width: 16px;
  height: 16px;
}

.ip-value {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: clamp(20px, 3.2vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  word-break: break-all;
  overflow-wrap: anywhere;
  line-height: 1.15;
}

.ip-value.loading {
  color: var(--muted);
  font-style: italic;
  font-weight: 500;
  font-family: "Inter", sans-serif;
  font-size: clamp(15px, 2vw, 19px);
}

.ip-value.error {
  color: var(--muted);
  font-style: italic;
  font-weight: 500;
  font-family: "Inter", sans-serif;
  font-size: clamp(15px, 2vw, 19px);
}

.ip-country {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 22px;
}

.ip-country svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.ip-city {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  min-height: 18px;
}

.copy-btn {
  min-height: 40px;
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: 0.2s ease;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

.copy-btn.copied {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.copy-btn svg {
  width: 15px;
  height: 15px;
}

.copy-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}

.btn {
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 16px;
  text-decoration: none;
  border: 1px solid var(--border);
  transition: 0.2s ease;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  background: transparent;
  color: var(--text);
}

.btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-primary {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: white;
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: wait;
}

.conn-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid color-mix(in srgb, var(--primary) 24%, transparent);
  font-size: 15px;
  font-weight: 600;
  margin-top: 24px;
}

.conn-badge svg {
  width: 17px;
  height: 17px;
}

.conn-badge.unknown {
  color: var(--muted);
  background: var(--surface-strong);
  border-color: var(--border);
}

.curl-hint {
  text-align: center;
  margin-top: 36px;
  color: var(--muted);
  font-size: 14px;
}

.curl-hint code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px 8px;
  color: var(--text);
}

.footer {
  padding: 20px 0 44px;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 600;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

@media (max-width: 640px) {
  .hero {
    padding: 40px 0 24px;
  }

  .header-inner {
    min-height: auto;
    padding: 14px 0;
  }

  .ip-card {
    padding: 22px;
  }

  .ip-row {
    flex-direction: column;
    gap: 14px;
  }

  .copy-btn {
    align-self: stretch;
    justify-content: center;
  }

  .ip-value {
    font-size: 22px;
  }

  .actions .btn {
    flex: 1 1 100%;
    justify-content: center;
  }

  .curl-hint {
    font-size: 13px;
  }

  .footer-inner {
    justify-content: center;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}