/* ============================================================
   IPINFO — Style
   Design: Technical / Developer / Data → Cabinet Grotesk + Satoshi
   Palette: Deep teal accent on near-black / off-white surfaces
   ============================================================ */

/* --- Design Tokens --- */
:root,
[data-theme='light'] {
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --text-xs:   clamp(0.75rem,  0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw,   1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem + 2.5vw,  3.5rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-default: 960px;
  --content-wide:    1160px;

  /* Light mode surfaces */
  --color-bg:              #f5f5f4;
  --color-surface:         #ffffff;
  --color-surface-2:       #fafaf9;
  --color-surface-offset:  #eeecea;
  --color-border:          #d6d4cf;
  --color-divider:         #e2e0db;

  /* Light mode text */
  --color-text:        #1a1a18;
  --color-text-muted:  #6b6a66;
  --color-text-faint:  #b0afaa;
  --color-text-inverse:#f8f8f6;

  /* Teal accent */
  --color-primary:          #01696f;
  --color-primary-hover:    #0c4e54;
  --color-primary-highlight:#d0dcda;
  --color-primary-subtle:   #e8f0ef;

  /* Version badge colors */
  --color-v4-bg:    #e8f0ef;
  --color-v4-text:  #015a60;
  --color-v6-bg:    #eeeaf6;
  --color-v6-text:  #5a2fb0;
  --color-v6-accent:#7a4fd6;

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 14px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

[data-theme='dark'] {
  --color-bg:              #121210;
  --color-surface:         #1b1b18;
  --color-surface-2:       #202020;
  --color-surface-offset:  #252520;
  --color-border:          #333330;
  --color-divider:         #2a2a27;

  --color-text:        #d8d8d4;
  --color-text-muted:  #7a7976;
  --color-text-faint:  #4e4e4b;
  --color-text-inverse:#1a1a18;

  --color-primary:          #4fa8b0;
  --color-primary-hover:    #3a8f97;
  --color-primary-highlight:#293535;
  --color-primary-subtle:   #1e2d2e;

  --color-v4-bg:    #1e2d2e;
  --color-v4-text:  #6ec9d0;
  --color-v6-bg:    #251e38;
  --color-v6-text:  #a68de8;
  --color-v6-accent:#a68de8;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
  --shadow-md: 0 4px 14px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #121210;
    --color-surface:         #1b1b18;
    --color-surface-2:       #202020;
    --color-surface-offset:  #252520;
    --color-border:          #333330;
    --color-divider:         #2a2a27;
    --color-text:        #d8d8d4;
    --color-text-muted:  #7a7976;
    --color-text-faint:  #4e4e4b;
    --color-text-inverse:#1a1a18;
    --color-primary:          #4fa8b0;
    --color-primary-hover:    #3a8f97;
    --color-primary-highlight:#293535;
    --color-primary-subtle:   #1e2d2e;
    --color-v4-bg:    #1e2d2e;
    --color-v4-text:  #6ec9d0;
    --color-v6-bg:    #251e38;
    --color-v6-text:  #a68de8;
    --color-v6-accent:#a68de8;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
    --shadow-md: 0 4px 14px oklch(0 0 0 / 0.35);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);
  }
}

/* --- Base Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 250ms ease, color 250ms ease;
}

img, svg { display: block; max-width: 100%; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a, button, [role='button'] {
  transition: color var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
::selection { background: color-mix(in oklab, var(--color-primary) 25%, transparent); color: var(--color-text); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 5vw, var(--space-8));
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  padding-block: var(--space-4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

/* --- IP Search --- */
.ip-search-form {
  max-width: 280px;
}

.ip-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.ip-search-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--color-text-faint);
  pointer-events: none;
  flex-shrink: 0;
}

.ip-search-input {
  width: 100%;
  height: 36px;
  padding: 0 var(--space-8) 0 calc(var(--space-3) + 15px + var(--space-2));
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.ip-search-input::placeholder { color: var(--color-text-faint); }
.ip-search-input:focus {
  border-color: #2B90CC;
  box-shadow: 0 0 0 3px color-mix(in oklab, #2B90CC 15%, transparent);
}
[data-theme='dark'] .ip-search-input:focus {
  border-color: #5BB0DC;
  box-shadow: 0 0 0 3px color-mix(in oklab, #5BB0DC 15%, transparent);
}

.ip-search-btn {
  position: absolute;
  right: var(--space-1);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: calc(var(--radius-md) - 2px);
  background: transparent;
  color: var(--color-text-muted);
  border: none;
  cursor: pointer;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.ip-search-btn:hover {
  background: var(--color-surface-offset);
  color: #2B90CC;
}
[data-theme='dark'] .ip-search-btn:hover { color: #5BB0DC; }

@media (max-width: 480px) {
  .ip-search-form { max-width: 140px; }
  .logo-sub { display: none; }
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  object-fit: contain;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.logo-sub {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0;
  color: var(--color-text-muted);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.theme-toggle:hover { background: var(--color-surface-offset); color: var(--color-text); }

/* --- Hero --- */
.hero {
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
  background: linear-gradient(
    in oklab 150deg,
    #d6eaf6 0%,
    #eaf4fb 40%,
    var(--color-bg) 70%
  );
  border-bottom: 1px solid var(--color-divider);
}

[data-theme='dark'] .hero {
  background: linear-gradient(
    in oklab 150deg,
    #0e2233 0%,
    #0f1d2a 40%,
    var(--color-bg) 70%
  );
}

.hero-eyebrow {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #2B90CC;
  margin-bottom: var(--space-3);
}

[data-theme='dark'] .hero-eyebrow {
  color: #5BB0DC;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--space-3);
  min-height: 1.1em;
}

.hero-sub {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  min-height: 1.2em;
}

/* --- Skeleton Loaders --- */
@keyframes shimmer {
  0%   { background-position: -600px 0; }
  100% { background-position: 600px 0; }
}

.skeleton {
  display: inline-block;
  background: linear-gradient(
    90deg,
    var(--color-surface-offset) 25%,
    var(--color-divider) 50%,
    var(--color-surface-offset) 75%
  );
  background-size: 600px 100%;
  animation: shimmer 1.4s infinite ease-in-out;
  border-radius: var(--radius-sm);
}

.ip-skeleton  { width: clamp(180px, 40vw, 320px); height: 1em; border-radius: var(--radius-md); }
.skeleton-sm  { width: clamp(120px, 25vw, 220px); height: 0.85em; }
.skeleton-xs  { width: clamp(60px,  12vw, 100px); height: 0.7em;  }
.skeleton-row { padding-block: var(--space-1); }

/* --- Cards Section --- */
.cards-section {
  padding-block: clamp(var(--space-6), 5vw, var(--space-8));
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: var(--space-6);
}

.ip-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-interactive);
}
.ip-card:hover { box-shadow: var(--shadow-md); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.version-badge {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.version-badge.v4 {
  background: var(--color-v4-bg);
  color: var(--color-v4-text);
}

.version-badge.v6 {
  background: var(--color-v6-bg);
  color: var(--color-v6-text);
}

.ip-value {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.2vw + 0.7rem, 1.45rem);
  font-weight: 500;
  color: var(--color-text);
  word-break: break-all;
  margin-bottom: var(--space-5);
  letter-spacing: -0.01em;
  min-height: 1.4em;
}

.copy-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}
.copy-btn:hover { background: var(--color-surface-offset); color: var(--color-primary); }
.copy-btn.copied { color: #437a22; border-color: #c3d9bb; background: #eaf2e6; }

/* Info list inside card */
.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-4);
}

.info-row {
  display: grid;
  grid-template-columns: minmax(90px, 1fr) 2fr;
  gap: var(--space-3);
  padding-block: var(--space-2);
  border-bottom: 1px solid color-mix(in oklab, var(--color-divider) 60%, transparent);
  align-items: baseline;
}
.info-row:last-child { border-bottom: none; }

.info-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.info-value {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-family: var(--font-body);
  word-break: break-all;
}

.unavailable {
  color: var(--color-text-faint);
  font-style: italic;
  font-size: var(--text-xs);
}


.section-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

/* --- Raw JSON wrapper & copy button --- */
.raw-wrapper {
  position: relative;
}

.raw-copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.raw-copy-btn:hover { background: var(--color-surface-dynamic); color: var(--color-text); }
.raw-copy-btn.copied { color: #437a22; border-color: #c3d9bb; background: #eaf2e6; }
[data-theme='dark'] .raw-copy-btn.copied { color: #6daa45; border-color: #3a4435; background: #1e2b1a; }

/* --- Raw JSON Section --- */
.raw-section {
  padding-block: clamp(var(--space-6), 5vw, var(--space-8));
}

.raw-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.raw-header .section-title { margin-bottom: 0; }

.tab-group {
  display: flex;
  gap: var(--space-1);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  padding: var(--space-1);
}

.tab {
  padding: var(--space-2) var(--space-4);
  border-radius: calc(var(--radius-md) - 2px);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}
.tab:hover { color: var(--color-text); }
.tab.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.raw-json {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-height: 400px;
  overflow-y: auto;
}

.raw-json code { font-family: inherit; white-space: pre; }

/* JSON syntax highlight */
.json-key    { color: var(--color-primary); font-weight: 500; }
.json-string { color: #c07a3b; }
.json-number { color: #7a62bb; }
.json-bool   { color: #5a9e4e; }
.json-null   { color: var(--color-text-faint); }

[data-theme='dark'] .json-string { color: #e8a86e; }
[data-theme='dark'] .json-number { color: #b0a0e8; }
[data-theme='dark'] .json-bool   { color: #8ecf7e; }

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-6);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-inner a {
  color: var(--color-primary);
  text-decoration: none;
}
.footer-inner a:hover { text-decoration: underline; }

/* --- Toast --- */
.toast {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%) translateY(calc(100% + var(--space-6)));
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
  z-index: 1000;
  transition: transform 250ms cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
.toast.visible {
  transform: translateX(-50%) translateY(0);
}

/* --- Dual Stack Note --- */
.dual-stack-note {
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  line-height: 1.5;
}

/* --- Hidden utility --- */
.hidden { display: none !important; }

/* --- Mobile --- */
@media (max-width: 600px) {
  .cards-grid { grid-template-columns: 1fr; }
  .details-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { flex-direction: column; text-align: center; }
}