/* ==========================================================
   DevToolbox — Global Stylesheet
   A premium, restrained dark theme. One accent color, subtle
   borders, no neon/glow, minimal animation.
   ========================================================== */

:root {
  --bg: #0d0e12;
  --bg-elevated: #16171d;
  --bg-card: #1a1b22;
  --bg-card-hover: #202129;
  --bg-input: #121317;
  --border: #2a2b34;
  --border-strong: #383a46;

  --text-primary: #f1f2f5;
  --text-secondary: #b4b7c2;
  --text-muted: #838794;

  --accent: #4f8cff;
  --accent-hover: #6d9fff;
  --accent-dim: rgba(79, 140, 255, 0.14);
  --accent-text: #9db9ff;

  --success: #34c98e;
  --success-bg: rgba(52, 201, 142, 0.12);
  --danger: #f2545b;
  --danger-bg: rgba(242, 84, 91, 0.12);
  --warning: #e8b339;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);

  --container-width: 1180px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

img, svg {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 650;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.5rem); }
h2 { font-size: clamp(1.35rem, 1.15rem + 0.8vw, 1.75rem); }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1em; color: var(--text-secondary); }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 12px; top: -60px;
  background: var(--accent);
  color: #0a0f1c;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 200;
  transition: top .15s ease;
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.icon--sm { width: 16px; height: 16px; }
.icon--lg { width: 28px; height: 28px; }

/* ---------------- Buttons & form controls ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.94rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  transition: background .12s ease, border-color .12s ease, transform .06s ease;
  line-height: 1.2;
}
.btn:hover { background: var(--bg-card-hover); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0f1c;
}
.btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn--ghost {
  background: transparent;
  border-color: var(--border);
}
.btn--sm { padding: 7px 12px; font-size: 0.85rem; }
.btn--danger { border-color: var(--danger); color: var(--danger); background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.field {
  margin-bottom: 18px;
}
.field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.field-hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 6px;
}
.field-error {
  font-size: 0.82rem;
  color: var(--danger);
  margin-top: 6px;
}

input[type="text"],
input[type="email"],
input[type="search"],
input[type="number"],
input[type="datetime-local"],
input[type="password"],
textarea,
select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  transition: border-color .12s ease;
}
textarea { font-family: var(--font-mono); resize: vertical; }
input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  outline: none;
}
input.has-error, textarea.has-error { border-color: var(--danger); }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.checkbox-row input { width: auto; }

/* ---------------- Header / Nav ---------------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(13, 14, 18, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
}
.brand__mark {
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
}
.main-nav { flex: 1; min-width: 0; }
.main-nav__list {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
}
.main-nav__list a {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}
.main-nav__list a:hover { color: var(--text-primary); background: var(--bg-card); }
.main-nav__list a.is-active { color: var(--accent-text); background: var(--accent-dim); }

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-search {
  position: relative;
  display: flex;
  align-items: center;
}
.nav-search__icon {
  position: absolute;
  left: 11px;
  width: 16px; height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}
.nav-search input {
  width: 200px;
  padding: 8px 12px 8px 34px;
  font-size: 0.87rem;
  background: var(--bg-input);
}
.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 8px;
  cursor: pointer;
}
.mobile-nav-toggle .icon--close { display: none; }
.mobile-nav-toggle[aria-expanded="true"] .icon--menu { display: none; }
.mobile-nav-toggle[aria-expanded="true"] .icon--close { display: block; }

.mobile-nav {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 16px 20px 24px;
}
.mobile-nav.is-open { display: block; }
.mobile-nav__search { position: relative; margin-bottom: 14px; }
.mobile-nav__search input { padding-left: 34px; }
.mobile-nav__search .nav-search__icon { top: 50%; transform: translateY(-50%); }
.mobile-nav__list { list-style: none; margin: 0; padding: 0; }
.mobile-nav__list a {
  display: block;
  padding: 12px 4px;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
  color: var(--text-primary);
}

@media (max-width: 940px) {
  .main-nav, .nav-search { display: none; }
  .mobile-nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* ---------------- Hero ---------------- */
.hero {
  padding: 72px 0 56px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(700px 300px at 50% -10%, var(--accent-dim), transparent 70%);
}
.hero h1 { max-width: 760px; margin-left: auto; margin-right: auto; }
.hero__subtitle {
  max-width: 620px;
  margin: 0 auto 32px;
  font-size: 1.08rem;
  color: var(--text-secondary);
}
.hero-search {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}
.hero-search input {
  padding: 16px 18px 16px 48px;
  font-size: 1rem;
  border-radius: var(--radius-md);
  border-color: var(--border-strong);
}
.hero-search .nav-search__icon {
  left: 17px; top: 50%; transform: translateY(-50%);
  width: 20px; height: 20px;
}

/* ---------------- Sections ---------------- */
.section { padding: 56px 0; }
.section--tight { padding: 40px 0; }
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.section-header p { margin: 4px 0 0; max-width: 620px; }
.section-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-text);
  white-space: nowrap;
}
.section-link:hover { color: var(--accent-hover); }

.divider { border: none; border-top: 1px solid var(--border); margin: 0; }

/* ---------------- Cards / grids ---------------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.tool-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: background .12s ease, border-color .12s ease, transform .1s ease;
}
.tool-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.tool-card__icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim);
  color: var(--accent-text);
  border-radius: var(--radius-sm);
}
.tool-card__body { flex: 1; min-width: 0; }
.tool-card__name {
  display: block;
  font-weight: 600;
  font-size: 0.98rem;
  margin-bottom: 2px;
}
.tool-card__desc {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tool-card__arrow { color: var(--text-muted); flex-shrink: 0; }

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.category-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: background .12s ease, border-color .12s ease;
}
.category-card:hover { background: var(--bg-card-hover); border-color: var(--border-strong); }
.category-card__icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim);
  color: var(--accent-text);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
}
.category-card h3 { margin-bottom: 6px; }
.category-card p { font-size: 0.9rem; margin-bottom: 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.feature-item h3 { display: flex; align-items: center; gap: 10px; font-size: 1.02rem; }
.feature-item .icon { color: var(--accent-text); }
.feature-item p { font-size: 0.92rem; }

/* ---------------- Tool page layout ---------------- */
.tool-page-header {
  padding: 32px 0 8px;
}
.tool-page-header__top {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 10px;
}
.tool-page-header__icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim);
  color: var(--accent-text);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.tool-page-header__icon .icon { width: 26px; height: 26px; }
.tool-intro { max-width: 760px; font-size: 1.02rem; }

.tool-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 20px 0 8px;
  box-shadow: var(--shadow-sm);
}
.tool-panel__toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.tool-panel__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 760px) {
  .tool-panel__grid { grid-template-columns: 1fr; }
}
.tool-panel textarea.code {
  min-height: 220px;
  font-size: 0.88rem;
}
.tool-panel__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.tool-output {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 48px;
}
.tool-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
}
.tool-status--ok { background: var(--success-bg); color: var(--success); }
.tool-status--error { background: var(--danger-bg); color: var(--danger); }
.tool-error-box {
  background: var(--danger-bg);
  border: 1px solid rgba(242, 84, 91, 0.35);
  color: #ffb3b6;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.88rem;
  margin-top: 10px;
}
.privacy-note {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 14px;
}
.privacy-note .icon { color: var(--success); width: 15px; height: 15px; }

.range-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.range-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.range-row output {
  font-family: var(--font-mono);
  font-weight: 600;
  min-width: 2.4ch;
  text-align: right;
}

.options-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 14px 0;
}

.swatch {
  display: inline-block;
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
}

/* ---------------- Tool content sections ---------------- */
.tool-content { max-width: 820px; }
.tool-content h2 { margin-top: 2.2em; }
.tool-content h2:first-child { margin-top: 0; }
.tool-content ol, .tool-content ul { color: var(--text-secondary); padding-left: 1.3em; }
.tool-content li { margin-bottom: 0.5em; }
.example-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin: 16px 0;
}
.example-block__label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 8px;
}
.example-block pre {
  margin: 0 0 10px;
  padding: 10px 12px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.example-block pre:last-child { margin-bottom: 0; }
.tips-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.tips-list li {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}
.tips-list li:last-child { border-bottom: none; }
.tips-list .icon { color: var(--success); flex-shrink: 0; margin-top: 2px; }

.faq-list { border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary {
  padding: 16px 4px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--text-muted);
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p { padding: 0 4px 16px; margin: 0; }

/* ---------------- Related tools ---------------- */
.related-tools { margin-top: 12px; }

/* ---------------- Breadcrumbs ---------------- */
.breadcrumbs { padding: 14px 0 0; }
.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--accent-text); }
.breadcrumbs [aria-current="page"] { color: var(--text-secondary); }
.breadcrumbs__sep { display: flex; color: var(--border-strong); }

/* ---------------- FAQ / Home sections ---------------- */
.faq-home .faq-list { max-width: 820px; }

/* ---------------- Search ---------------- */
.search-hero { padding: 40px 0 24px; }
.search-form { position: relative; max-width: 560px; }
.search-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}
.search-results-count { margin-bottom: 18px; color: var(--text-muted); font-size: 0.9rem; }

/* ---------------- Tables (status codes / mime lookup) ---------------- */
.data-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
table.data-table th, table.data-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
table.data-table td:last-child { white-space: normal; }
table.data-table th {
  background: var(--bg-elevated);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tbody tr:hover { background: var(--bg-card); }
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 0.76rem;
  font-weight: 700;
  background: var(--accent-dim);
  color: var(--accent-text);
}
.badge--2xx { background: var(--success-bg); color: var(--success); }
.badge--4xx, .badge--5xx { background: var(--danger-bg); color: var(--danger); }
.badge--3xx { background: rgba(232,179,57,0.14); color: var(--warning); }

/* ---------------- Legal / static content pages ---------------- */
.prose { max-width: 780px; }
.prose h2 { margin-top: 1.8em; }
.prose ul { color: var(--text-secondary); padding-left: 1.3em; }
.prose li { margin-bottom: 0.4em; }
.placeholder { color: var(--warning); font-family: var(--font-mono); font-size: 0.92em; }

/* ---------------- Contact form ---------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 40px;
  align-items: start;
}
@media (max-width: 820px) {
  .contact-layout { grid-template-columns: 1fr; }
}
.alert {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 0.92rem;
}
.alert--success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(52,201,142,0.3); }
.alert--error { background: var(--danger-bg); color: #ffb3b6; border: 1px solid rgba(242,84,91,0.3); }

/* ---------------- Footer ---------------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  margin-top: 60px;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
  padding: 48px 0 32px;
}
.site-footer__brand { max-width: 280px; }
.site-footer__tagline { font-size: 0.88rem; margin-top: 10px; }
.site-footer__cols {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}
.site-footer__col h3 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.site-footer__col ul { list-style: none; margin: 0; padding: 0; }
.site-footer__col li { margin-bottom: 9px; }
.site-footer__col a { font-size: 0.9rem; color: var(--text-secondary); }
.site-footer__col a:hover { color: var(--accent-text); }
.site-footer__bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}
.site-footer__bottom p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------------- Ads ---------------- */
.ad-slot {
  margin: 32px 0;
  text-align: center;
}
.ad-slot--rectangle { max-width: 336px; margin-left: auto; margin-right: auto; }

/* ---------------- Toast ---------------- */
.dt-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: 100px;
  font-size: 0.86rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease;
  z-index: 300;
}
.dt-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------------- 404 / 500 ---------------- */
.error-page {
  text-align: center;
  padding: 80px 0;
}
.error-page__code {
  font-size: 5rem;
  font-weight: 800;
  color: var(--border-strong);
  font-family: var(--font-mono);
  margin-bottom: 0;
}

/* ---------------- Utility ---------------- */
.mt-0 { margin-top: 0; }
.text-muted { color: var(--text-muted); }
.stack { display: flex; flex-direction: column; gap: 12px; }
.cluster { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

@media (max-width: 600px) {
  .section { padding: 40px 0; }
  .hero { padding: 48px 0 36px; }
  .tool-panel { padding: 16px; }
  .site-header__inner { height: 58px; }
}