/* =========================================================
   UTM Builder
   By Antonio Luis Pérez Carmona
   Dark mode only. Violet + cyan accent.
   ========================================================= */

:root {
  --bg: #08080c;
  --surface: #12121b;
  --surface-solid: #12121b;
  --surface-2: #1a1a24;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text: #ececf1;
  --text-2: #a8a8b3;
  --text-3: #6f6f7e;

  --violet: #7c5cff;
  --cyan: #00d4ff;
  --gradient: linear-gradient(135deg, #7c5cff, #00d4ff);

  --ok: #1fd48f;
  --warn: #ffb84d;
  --err: #ff5c7a;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 28px;

  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --display: "Space Grotesk", Inter, system-ui, sans-serif;
  --body: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

html { color-scheme: dark; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Static accent glow behind header. Cheap: no animation, no full-screen paint. */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 420px;
  background:
    radial-gradient(600px 320px at 15% 0%, rgba(124, 92, 255, 0.14), transparent 70%),
    radial-gradient(600px 320px at 90% 10%, rgba(0, 212, 255, 0.09), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* Focus */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface-solid);
  color: var(--text);
  padding: 8px 12px;
  border-radius: var(--r-sm);
  z-index: 100;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* =========================
   Header
   ========================= */
.site-header {
  padding: 28px 0 12px;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 10px 30px rgba(124, 92, 255, 0.35);
  flex-shrink: 0;
}
.brand-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 24px;
  margin: 0;
  letter-spacing: -0.01em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-tag {
  margin: 2px 0 0;
  color: var(--text-2);
  font-size: 13px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.ghost-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  transition: border-color .15s, color .15s, transform .15s;
}
.ghost-link:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  background: var(--surface);
}
.lang-btn {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--text-3);
  transition: background .15s, color .15s;
}
.lang-btn.is-active {
  background: var(--gradient);
  color: #0a0a10;
}

/* =========================
   Privacy banner
   ========================= */
.privacy-banner {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #0d0d15;
}
.privacy-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  font-size: 12.5px;
  color: var(--text-2);
}
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(31, 212, 143, 0.6);
  animation: pulse 2s infinite;
  flex-shrink: 0;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(31, 212, 143, 0.55); }
  70% { box-shadow: 0 0 0 10px rgba(31, 212, 143, 0); }
  100% { box-shadow: 0 0 0 0 rgba(31, 212, 143, 0); }
}

/* =========================
   Main + Tabs
   ========================= */
.main {
  padding: 28px 24px 48px;
}

.tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--surface);
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.tabs-spacer { flex: 1; }

.tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.tab:hover { color: var(--text); }
.tab.is-active {
  background: var(--gradient);
  color: #0a0a10;
  font-weight: 600;
}

/* Strict toggle */
.strict-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12.5px;
  cursor: pointer;
  user-select: none;
}
.strict-toggle input { display: none; }
.strict-track {
  position: relative;
  width: 36px;
  height: 20px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  transition: background .2s;
  flex-shrink: 0;
}
.strict-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-2);
  transition: transform .2s, background .2s;
}
.strict-toggle input:checked + .strict-track {
  background: var(--gradient);
}
.strict-toggle input:checked + .strict-track .strict-thumb {
  transform: translateX(16px);
  background: #0a0a10;
}
.strict-toggle:hover { color: var(--text); }

/* =========================
   Panels
   ========================= */
.panel { display: none; animation: fade .2s ease; }
.panel.is-active { display: block; }
.panel[hidden] { display: none; }

@keyframes fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

/* =========================
   Grid
   ========================= */
.grid { display: grid; gap: 18px; }
.grid.two-col { grid-template-columns: 1fr 1fr; }
.grid.gap-sm { gap: 12px; }

/* =========================
   Cards
   ========================= */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--shadow-md);
}
.card-head { margin-bottom: 16px; }
.card-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 18px;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
.card-sub {
  margin: 0;
  color: var(--text-2);
  font-size: 13px;
}

.stack > * + * { margin-top: 14px; }
.mt-md { margin-top: 16px; }

/* =========================
   Fields
   ========================= */
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.01em;
}
.field .req { color: var(--err); margin-left: 2px; }
.field-hint {
  margin: 4px 0 0;
  font-size: 11.5px;
  color: var(--text-3);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  background: rgba(8, 8, 14, 0.6);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 13px;
  border-radius: var(--r-md);
  font-family: var(--mono);
  font-size: 13.5px;
  transition: border-color .15s, background .15s;
}
.field input::placeholder,
.field textarea::placeholder {
  color: var(--text-3);
}
.field input:hover,
.field select:hover,
.field textarea:hover {
  border-color: var(--border-strong);
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: rgba(0, 212, 255, 0.5);
  background: rgba(8, 8, 14, 0.85);
  outline: none;
}
.field select {
  font-family: var(--body);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%23a8a8b3' d='M6 8L0 0h12z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.field textarea {
  resize: vertical;
  line-height: 1.5;
}

/* =========================
   Buttons
   ========================= */
.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  transition: transform .15s, box-shadow .15s, opacity .15s, filter .15s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--gradient);
  color: #0a0a10;
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
}
.btn-primary:hover { filter: brightness(1.08); }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
}
.btn-ghost:hover { color: var(--text); border-color: var(--border-strong); }

/* =========================
   Preview
   ========================= */
.preview-box {
  background: rgba(8, 8, 14, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 16px;
  margin-bottom: 12px;
  word-break: break-all;
  min-height: 80px;
}
.preview-url {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  color: var(--text);
  display: block;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.preview-url.is-empty { color: var(--text-3); }
.preview-url .param-key { color: var(--cyan); }
.preview-url .param-val { color: var(--text); }
.preview-url .amp { color: var(--text-3); }
.preview-url .base { color: var(--text-2); }

.preview-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  min-height: 22px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-2);
}
.chip.ok { color: var(--ok); border-color: rgba(31, 212, 143, 0.3); }
.chip.warn { color: var(--warn); border-color: rgba(255, 184, 77, 0.3); }
.chip.err { color: var(--err); border-color: rgba(255, 92, 122, 0.3); }

.hint-list {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}
.hint-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
}
.hint-bullets {
  margin: 0;
  padding-left: 18px;
  color: var(--text-2);
  font-size: 12.5px;
}
.hint-bullets li { margin-bottom: 4px; }

/* =========================
   Tables
   ========================= */
.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-top: 14px;
}
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.results-table thead th {
  background: rgba(255,255,255,0.03);
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
}
.results-table tbody td {
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  vertical-align: top;
  word-break: break-word;
}
.results-table tbody tr:first-child td { border-top: 0; }
.results-table tbody tr:hover { background: rgba(255,255,255,0.02); }
.results-table .mono, .mono {
  font-family: var(--mono);
  font-size: 12.5px;
}
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  font-family: var(--body);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.status-pill.ok { color: var(--ok); background: rgba(31, 212, 143, 0.12); }
.status-pill.warn { color: var(--warn); background: rgba(255, 184, 77, 0.12); }
.status-pill.err { color: var(--err); background: rgba(255, 92, 122, 0.12); }

.issue-list {
  margin: 4px 0 0;
  padding-left: 16px;
  color: var(--text-3);
  font-size: 11.5px;
}

/* =========================
   Recents
   ========================= */
.recents-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.recent-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: rgba(8, 8, 14, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}
.recent-url {
  flex: 1;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  word-break: break-all;
  min-width: 0;
}
.recent-meta {
  font-size: 11px;
  color: var(--text-3);
  flex-shrink: 0;
}
.recent-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}
.icon-btn {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--text-2);
  border: 1px solid var(--border);
  transition: color .15s, border-color .15s, background .15s;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); background: rgba(255,255,255,0.03); }

/* =========================
   Toast
   ========================= */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface-solid);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast i { color: var(--ok); }

/* =========================
   Footer
   ========================= */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  margin-top: 32px;
  background: rgba(8, 8, 14, 0.4);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}
.footer-main {
  margin: 0;
  font-size: 13px;
  color: var(--text-2);
}
.footer-main strong { color: var(--text); font-weight: 600; }
.footer-main .sep { margin: 0 6px; color: var(--text-3); }
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-2);
  transition: color .15s;
}
.footer-links a:hover { color: var(--text); }
.footer-links .up-right { font-size: 10px; color: var(--text-3); }
.footer-tag {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--text-3);
  font-style: italic;
}

/* =========================
   Responsive
   ========================= */
@media (max-width: 720px) {
  .container { padding: 0 16px; }
  .main { padding: 20px 16px 40px; }

  .brand-title { font-size: 20px; }
  .brand-tag { font-size: 12px; }

  .header-inner { gap: 14px; }
  .header-actions { width: 100%; justify-content: space-between; }

  .grid.two-col { grid-template-columns: 1fr; }

  .tabs { padding: 6px; }
  .tab { padding: 8px 12px; font-size: 12.5px; }
  .strict-toggle { margin-left: auto; }

  .card { padding: 18px; }

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

  .recent-item { flex-wrap: wrap; }
  .recent-url { flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .pulse-dot { animation: none; }
}