/* ============================================================
   Dev Tools — "Aurora Glass" theme
   ============================================================ */

:root {
  /* base */
  --bg: #070912;
  --bg-2: #0a0e1a;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-2: rgba(255, 255, 255, 0.07);
  --surface-inset: rgba(0, 0, 0, 0.28);
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.18);
  --highlight: rgba(255, 255, 255, 0.06);

  /* text */
  --text: #eaf0fb;
  --text-dim: #9fabc4;
  --text-faint: #6b7793;

  /* accent */
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --grad: linear-gradient(135deg, var(--accent), var(--accent-2));
  --accent-contrast: #07101f;
  --accent-soft: rgba(139, 92, 246, 0.16);

  --ok: #34d399;
  --danger: #fb7185;

  /* shape */
  --r-lg: 18px;
  --r-md: 12px;
  --r-sm: 10px;
  --shadow: 0 18px 50px -18px rgba(0, 0, 0, 0.7), 0 2px 8px rgba(0, 0, 0, 0.3);

  --mono: ui-monospace, "Cascadia Code", "Cascadia Mono", "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* aurora glow colors */
  --glow-1: rgba(139, 92, 246, 0.40);
  --glow-2: rgba(34, 211, 238, 0.30);
  --glow-3: rgba(236, 72, 153, 0.22);
}

:root[data-theme="light"] {
  --bg: #eef1f8;
  --bg-2: #f6f8fc;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-2: rgba(255, 255, 255, 0.9);
  --surface-inset: rgba(255, 255, 255, 0.85);
  --border: rgba(20, 28, 48, 0.10);
  --border-strong: rgba(20, 28, 48, 0.18);
  --highlight: rgba(255, 255, 255, 0.9);

  --text: #131a2b;
  --text-dim: #4f5b73;
  --text-faint: #8893a8;

  --accent: #7c3aed;
  --accent-2: #0e7490;
  --accent-contrast: #ffffff;
  --accent-soft: rgba(124, 58, 237, 0.12);

  --ok: #059669;
  --danger: #e11d48;

  --shadow: 0 18px 44px -20px rgba(30, 41, 82, 0.40), 0 2px 6px rgba(30, 41, 82, 0.08);

  --glow-1: rgba(124, 58, 237, 0.18);
  --glow-2: rgba(8, 145, 178, 0.16);
  --glow-3: rgba(236, 72, 153, 0.12);
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

/* ===== Aurora background ===== */
body::before {
  content: "";
  position: fixed;
  inset: -20%;
  z-index: -2;
  background:
    radial-gradient(38% 42% at 12% 8%, var(--glow-1), transparent 60%),
    radial-gradient(42% 46% at 92% 18%, var(--glow-2), transparent 62%),
    radial-gradient(46% 50% at 78% 96%, var(--glow-3), transparent 60%),
    radial-gradient(40% 44% at 4% 88%, var(--glow-2), transparent 60%);
  filter: saturate(1.1);
  animation: aurora 26s ease-in-out infinite alternate;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: radial-gradient(rgba(127, 140, 175, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
@keyframes aurora {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(2%, -2%, 0) scale(1.08); }
  100% { transform: translate3d(-2%, 1%, 0) scale(1.04); }
}

a { color: var(--accent-2); text-decoration: none; transition: color .15s; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--surface-inset);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 6px;
  color: var(--text);
}

/* ===== Layout ===== */
.container {
  max-width: 940px;
  margin: 0 auto;
  padding: 28px 22px 80px;
}

/* ===== Header ===== */
.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  font-weight: 600;
  font-size: 14px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  white-space: nowrap;
  transition: color .15s, border-color .15s, transform .15s;
}
.site-header .home-link:hover {
  color: var(--text);
  border-color: var(--border-strong);
  text-decoration: none;
  transform: translateX(-2px);
}
.site-header h1 {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 16px;
  margin: 0;
  font-weight: 650;
  letter-spacing: 0.2px;
  flex: 1;
}

/* small gradient brand / page icon */
.page-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 12px -3px var(--accent-soft), inset 0 1px 0 rgba(255,255,255,.25);
  flex: none;
}
.page-icon svg { width: 18px; height: 18px; }
.brand-dot {
  width: 22px; height: 22px; border-radius: 7px;
  background: var(--grad);
  box-shadow: 0 0 16px -2px var(--accent-soft), inset 0 1px 0 rgba(255,255,255,.3);
  flex: none;
}

/* ===== Theme toggle ===== */
.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 17px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .2s, border-color .15s, background .15s;
}
.theme-toggle:hover {
  border-color: var(--border-strong);
  transform: rotate(18deg) scale(1.05);
}

/* ===== Language toggle ===== */
.lang-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  min-width: 40px;
  height: 40px;
  padding: 0 11px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s, border-color .15s, background .15s;
}
.lang-toggle:hover { border-color: var(--border-strong); transform: scale(1.06); }

/* ===== Landing hero ===== */
.hero { padding: 46px 0 30px; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .8px; text-transform: uppercase;
  color: var(--text-dim);
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  margin-bottom: 18px;
}
.hero .eyebrow .brand-dot { width: 14px; height: 14px; border-radius: 5px; }
.hero h1 {
  font-size: clamp(36px, 7vw, 60px);
  line-height: 1.04;
  margin: 0 0 14px;
  font-weight: 760;
  letter-spacing: -1.4px;
  background: linear-gradient(120deg, var(--text) 30%, var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p { color: var(--text-dim); font-size: 17px; max-width: 60ch; margin: 0; }

/* ===== Landing grid ===== */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 18px;
  margin-top: 30px;
}
.tool-card {
  position: relative;
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
  color: inherit;
  overflow: hidden;
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  box-shadow: inset 0 1px 0 var(--highlight);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.tool-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 50% -20%, color-mix(in srgb, var(--t1) 22%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity .18s ease;
  pointer-events: none;
}
.tool-card:hover {
  text-decoration: none;
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--t1) 55%, var(--border));
  box-shadow: var(--shadow), 0 22px 60px -24px color-mix(in srgb, var(--t1) 70%, transparent);
}
.tool-card:hover::after { opacity: 1; }
.tool-card .icon-tile {
  width: 50px; height: 50px;
  border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, var(--t1), var(--t2));
  color: #fff;
  box-shadow: 0 10px 24px -8px color-mix(in srgb, var(--t1) 75%, transparent), inset 0 1px 0 rgba(255,255,255,.28);
}
.tool-card .icon-tile svg { width: 26px; height: 26px; }
.tool-card h3 { margin: 16px 0 5px; font-size: 16.5px; font-weight: 650; letter-spacing: -.2px; }
.tool-card p { margin: 0; color: var(--text-dim); font-size: 13.5px; }

/* per-tool accent hues */
.tool-card:nth-child(1) { --t1: #8b5cf6; --t2: #6d28d9; }
.tool-card:nth-child(2) { --t1: #38bdf8; --t2: #2563eb; }
.tool-card:nth-child(3) { --t1: #fb7185; --t2: #e11d48; }
.tool-card:nth-child(4) { --t1: #f59e0b; --t2: #ec4899; }
.tool-card:nth-child(5) { --t1: #22d3ee; --t2: #14b8a6; }
.tool-card:nth-child(6) { --t1: #a78bfa; --t2: #22d3ee; }

/* ===== Cards / panels ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
  margin-bottom: 20px;
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  box-shadow: var(--shadow), inset 0 1px 0 var(--highlight);
}
.card h2 {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.row { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; }
.row > .field { flex: 1; min-width: 120px; }
.field label {
  display: block;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-faint);
  margin-bottom: 7px;
  font-weight: 600;
}

/* ===== Form controls ===== */
input[type="text"],
input[type="number"],
input[type="datetime-local"],
select,
textarea {
  width: 100%;
  background: var(--surface-inset);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  padding: 11px 13px;
  font-family: var(--mono);
  font-size: 14px;
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
input::placeholder, textarea::placeholder { color: var(--text-faint); }
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 28%, transparent);
}
textarea { resize: vertical; min-height: 116px; line-height: 1.55; }
select { font-family: var(--sans); cursor: pointer; }
input[type="datetime-local"] { color-scheme: dark; }
:root[data-theme="light"] input[type="datetime-local"] { color-scheme: light; }

button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--text);
  padding: 10px 17px;
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: transform .12s, border-color .15s, box-shadow .15s, background .15s, opacity .15s;
}
button:hover, .btn:hover { border-color: var(--accent); transform: translateY(-1px); }
button:active, .btn:active { transform: translateY(0); }
button:focus-visible, .btn:focus-visible,
.tab:focus-visible, .theme-toggle:focus-visible, .home-link:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 45%, transparent);
}
button:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
button.primary, .btn.primary {
  background: var(--grad);
  border-color: transparent;
  color: var(--accent-contrast);
  box-shadow: 0 8px 24px -8px color-mix(in srgb, var(--accent) 80%, transparent);
}
button.primary:hover {
  filter: brightness(1.06);
  box-shadow: 0 12px 30px -8px color-mix(in srgb, var(--accent) 85%, transparent);
}
button.small {
  padding: 5px 11px;
  font-size: 12px;
  background: var(--surface-2);
  border-radius: 8px;
}

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; align-items: center; }

label.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 14px;
  user-select: none;
}
label.check input { width: auto; accent-color: var(--accent); }

/* ===== Tabs / segmented ===== */
.tabs, .seg {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 18px;
  padding: 5px;
  border: 1px solid var(--border);
  background: var(--surface-inset);
  border-radius: var(--r-md);
  width: fit-content;
  max-width: 100%;
}
.seg { border-radius: 999px; }
.tab {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.tab:hover { color: var(--text); transform: none; }
.tab.active {
  background: var(--grad);
  border-color: transparent;
  color: var(--accent-contrast);
  box-shadow: 0 6px 16px -6px color-mix(in srgb, var(--accent) 80%, transparent);
}

/* ===== Output blocks ===== */
.output-wrap { position: relative; }
.output-wrap .copy-btn {
  position: absolute;
  top: 9px;
  right: 9px;
  z-index: 2;
}
.result {
  background: var(--surface-inset);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 13px 15px;
  font-family: var(--mono);
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 26px;
}
.muted { color: var(--text-dim); }
.error { color: var(--danger); }
.mono { font-family: var(--mono); }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 10px 20px; align-items: center; }
.kv .k { color: var(--text-faint); font-size: 13px; font-weight: 600; }
.kv .v { font-family: var(--mono); word-break: break-all; }

.intro { color: var(--text-dim); margin: 4px 0 8px; }
.hint { color: var(--text-faint); font-size: 13px; margin-top: 9px; }
.hint.error { color: var(--danger); }

/* ===== Toast ===== */
#toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: color-mix(in srgb, var(--ok) 88%, transparent);
  color: #04130c;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
  z-index: 100;
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 30px -10px rgba(0,0,0,.5);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Globals ===== */
::selection { background: color-mix(in srgb, var(--accent) 42%, transparent); color: #fff; }
* { scrollbar-width: thin; scrollbar-color: rgba(140,150,180,0.3) transparent; }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-thumb {
  background: rgba(140, 150, 180, 0.26);
  border-radius: 10px;
  border: 3px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: rgba(140, 150, 180, 0.42); background-clip: padding-box; }

@media (max-width: 560px) {
  .tool-grid { grid-template-columns: 1fr; }
  .container { padding: 20px 15px 56px; }
  .site-header { padding: 12px 15px; }
}

@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}