/* ============================================================
   tools.chrisbmn.com — Main Stylesheet
   ============================================================ */

/* ─── Variables ──────────────────────────────────────────── */
:root {
  --brand:        #2BA3B2;
  --brand-dark:   #1d7e8a;
  --brand-light:  #e7f6f8;
  --brand-50:     #e7f6f8;
  --bg:           #ffffff;
  --surface:      #ffffff;
  --border:       #e2e8f0;
  --text:         #0f172a;
  --text-muted:   #64748b;
  --text-light:   #94a3b8;
  --success:      #16a34a;
  --warning:      #d97706;
  --danger:       #dc2626;
  --info:         #2563eb;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow:       0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:    0 10px 30px rgba(0,0,0,.12);
  --radius-xs:    6px;
  --radius-sm:    8px;
  --radius:       12px;
  --radius-lg:    16px;
  --dur:          0.2s;
  /* Category colours */
  --c-network:    #2563eb; --cb-network:   #eff6ff;
  --c-domain:     #7c3aed; --cb-domain:    #f5f3ff;
  --c-security:   #dc2626; --cb-security:  #fef2f2;
  --c-developer:  #16a34a; --cb-developer: #f0fdf4;
  --c-utilities:  #d97706; --cb-utilities: #fffbeb;
  --c-reference:  #64748b; --cb-reference: #f8fafc;
}

/* ─── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--brand); text-decoration: none; transition: color var(--dur) ease; }
a:hover { color: var(--brand-dark); }
img { max-width: 100%; display: block; }

/* ─── Layout shell ────────────────────────────────────────── */
.page-wrap { flex: 1; display: flex; flex-direction: column; }

/* ─── Subd template overrides ─────────────────────────────── */
/* Allow tools' full-width sections to break out of subd-content constraints */
.subd-content {
  max-width: none;
  padding: 0;
  width: 100%;
}

/* ─── Header ──────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  height: 64px;
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 100%;
}
.site-logo {
  display: flex; align-items: center; gap: .5rem;
  font-weight: 700; font-size: 1.05rem; color: var(--text);
  text-decoration: none; flex-shrink: 0;
}
.logo-img { height: 28px; width: auto; display: block; }
.logo-dot { color: var(--brand); }
.logo-tld { color: var(--text-muted); font-weight: 400; font-size: .9rem; }
.logo-text { font-weight: 700; font-size: 1rem; color: var(--text); }
.site-nav { display: flex; align-items: center; gap: 1.5rem; flex-shrink: 0; margin-left: auto; }
.site-nav a { font-size: .875rem; font-weight: 500; color: var(--text-muted); }
.site-nav a:hover { color: var(--brand); }

/* Header search */
.header-search {
  flex: 1; max-width: 560px;
  position: relative;
}
.header-search input {
  width: 100%;
  padding: .55rem 2.5rem .55rem 2.75rem;
  border: 1.5px solid var(--border); border-radius: 999px;
  font-size: .9375rem; font-family: inherit;
  background: #fff; outline: none; color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}
.header-search input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(43,163,178,.18);
}
.header-search input::placeholder { color: var(--text-light); }
.header-search .search-icon {
  position: absolute; left: 1rem; top: 50%;
  transform: translateY(-50%); pointer-events: none;
  color: var(--text-light); width: 16px; height: 16px;
}
.header-search .search-clear {
  position: absolute; right: .875rem; top: 50%;
  transform: translateY(-50%);
  background: none; border: none; cursor: pointer;
  color: var(--text-light); font-size: 1.1rem; line-height: 1;
  padding: 0; display: none; transition: color var(--dur);
}
.header-search .search-clear:hover { color: var(--text-muted); }

/* ─── Hero ────────────────────────────────────────────────── */
.hero {
  background: radial-gradient(1200px 500px at 10% -10%, rgba(37,99,235,.15), transparent 60%),
              radial-gradient(1000px 600px at 90% -10%, rgba(124,58,237,.15), transparent 60%),
              radial-gradient(900px 500px at 50% 0%, rgba(22,163,74,.1), transparent 60%);
  padding: 3.5rem 1.5rem 3rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.hero-badge {
  display: inline-flex; align-items: center; gap: .375rem;
  font-size: .75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .07em; color: var(--c-network);
  background: var(--brand-light); border: 1px solid var(--c-network);
  padding: .25rem .75rem; border-radius: 999px;
  margin-bottom: 1.25rem;
}
.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800; letter-spacing: -.025em;
  color: var(--text); margin-bottom: .75rem;
  line-height: 1.15;
}
.hero-title span { color: var(--c-domain); }
.hero-desc {
  font-size: 1.0625rem; color: var(--text-muted);
  max-width: 500px; margin: 0 auto 1.5rem;
}

/* Hero search bar */
.hero-search {
  position: relative;
  max-width: 480px;
  margin: 0 auto 1.75rem;
}
.hero-search input {
  width: 100%;
  padding: .7rem 2.5rem .7rem 2.875rem;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  outline: none;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}
.hero-search input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(43,163,178,.18);
}
.hero-search input::placeholder { color: var(--text-light); }
.hero-search .search-icon {
  position: absolute; left: 1rem; top: 50%;
  transform: translateY(-50%); pointer-events: none;
  color: var(--text-light); font-size: .875rem;
}
.hero-search .search-clear {
  position: absolute; right: 1rem; top: 50%;
  transform: translateY(-50%);
  background: none; border: none; cursor: pointer;
  color: var(--text-light); font-size: 1.15rem; line-height: 1;
  padding: 0; display: none; transition: color var(--dur);
}
.hero-search .search-clear:hover { color: var(--text-muted); }
/* Header Tooltip */
.tooltip {
  position: relative;
  cursor: pointer;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: black;
  color: white;
  padding: 5px 8px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.tooltip:hover::after {
  opacity: 1;
}

/* Category chips */
.category-filters {
  display: flex; align-items: center; justify-content: center;
  gap: .5rem; flex-wrap: wrap;
}
.category-chip {
  padding: .35rem .85rem;
  border-radius: 999px; font-size: .8125rem; font-weight: 500;
  border: 1.5px solid var(--border); background: #fff; color: var(--text-muted);
  cursor: pointer; transition: all var(--dur) ease; user-select: none;
}
.category-chip:hover { border-color: var(--brand); color: var(--brand); }
.category-chip.active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ─── Tools Section ───────────────────────────────────────── */
.tools-section { padding: 2.5rem 1.5rem 3rem; flex: 1; }
.tools-section-inner { max-width: 1280px; margin: 0 auto; }

.section-bar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.25rem;
}
.section-label {
  font-size: .8125rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted);
}
.tools-count { font-size: .8125rem; color: var(--text-light); }

/* ─── Tool Card Grid ──────────────────────────────────────── */
.tools-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}

.t-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.25rem 1.25rem 1rem;
  transition: transform var(--dur) ease, box-shadow var(--dur) ease, border-color var(--dur) ease;
  position: relative; overflow: hidden;
}
.t-card::after {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--cat-accent, var(--brand));
  opacity: 0; transition: opacity var(--dur) ease;
}
.t-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: rgba(43,163,178,.3); color: inherit; }
.t-card:hover::after { opacity: 1; }
.t-card-icon { font-size: 1.75rem; line-height: 1; margin-bottom: .75rem; display: block; }
.t-card-name { font-size: .9375rem; font-weight: 700; color: var(--text); margin-bottom: .375rem; }
.t-card-desc { font-size: .8125rem; color: var(--text-muted); line-height: 1.55; }
.t-card-foot {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: .875rem; padding-top: .875rem; border-top: 1px solid var(--border);
}
.t-card-badge {
  font-size: .6875rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  padding: .2rem .6rem; border-radius: 999px;
  background: var(--cat-bg, var(--brand-light)); color: var(--cat-accent, var(--brand));
}
.t-card-arrow { color: var(--text-light); font-size: .9rem; transition: transform var(--dur) ease, color var(--dur) ease; }
.t-card:hover .t-card-arrow { transform: translateX(3px); color: var(--brand); }

/* Category accent colours */
.cat-network  { --cat-accent: var(--c-network);   --cat-bg: var(--cb-network);   }
.cat-domain   { --cat-accent: var(--c-domain);    --cat-bg: var(--cb-domain);    }
.cat-security { --cat-accent: var(--c-security);  --cat-bg: var(--cb-security);  }
.cat-developer{ --cat-accent: var(--c-developer); --cat-bg: var(--cb-developer); }
.cat-utilities{ --cat-accent: var(--c-utilities); --cat-bg: var(--cb-utilities); }
.cat-reference{ --cat-accent: var(--c-reference); --cat-bg: var(--cb-reference); }

/* No results */
.no-results {
  display: none; grid-column: 1 / -1;
  text-align: center; padding: 3rem 1rem; color: var(--text-muted);
}
.no-results.visible { display: block; }
.no-results-icon { font-size: 3rem; margin-bottom: .75rem; }

/* ─── Tool Page Layout ────────────────────────────────────── */
.tool-layout {
  max-width: 1280px; margin: 0 auto;
  padding: 2rem 1.5rem;
  display: flex; gap: 2rem; align-items: flex-start; flex: 1;
}
.tool-sidebar {
  width: 236px; flex-shrink: 0;
  position: sticky; top: 80px;
}
.tool-main { flex: 1; min-width: 0; }

/* Back link */
.back-link {
  display: inline-flex; align-items: center; gap: .375rem;
  font-size: .875rem; font-weight: 500; color: var(--text-muted);
  margin-bottom: 1.5rem; transition: color var(--dur) ease;
}
.back-link:hover { color: var(--brand); }
.back-link svg { width: 16px; height: 16px; }

/* Tool header */
.tool-header { margin-bottom: 1.5rem; }
.tool-cat-badge {
  display: inline-block; font-size: .6875rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  padding: .25rem .65rem; border-radius: 999px; margin-bottom: .75rem;
  background: var(--cat-bg, var(--brand-light)); color: var(--cat-accent, var(--brand));
}
.tool-title {
  font-size: clamp(1.5rem, 3vw, 2.125rem); font-weight: 800;
  letter-spacing: -.025em; color: var(--text); margin-bottom: .5rem; line-height: 1.2;
}
.tool-desc { font-size: 1rem; color: var(--text-muted); line-height: 1.65; }

/* Form card */
.form-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  margin-bottom: 1.25rem; box-shadow: var(--shadow-sm);
}
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 160px; }
.form-group { margin-bottom: 1rem; }
.form-group:last-child { margin-bottom: 0; }

label {
  display: block; font-size: .875rem; font-weight: 600;
  color: var(--text); margin-bottom: .375rem;
}
.label-hint { font-size: .75rem; font-weight: 400; color: var(--text-muted); margin-left: .25rem; }

input[type="text"],
input[type="number"],
input[type="url"],
input[type="email"],
input[type="password"],
select,
textarea {
  display: block; width: 100%;
  padding: .625rem .875rem;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-size: .9375rem; font-family: inherit;
  color: var(--text); background: #fff; outline: none;
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(43,163,178,.15);
}
textarea { resize: vertical; min-height: 120px; line-height: 1.55; }
select { cursor: pointer; }

/* Checkboxes / radio row */
.check-row { display: flex; align-items: center; gap: .5rem; margin-bottom: .5rem; font-size: .875rem; }
.check-row input[type="checkbox"], .check-row input[type="radio"] {
  width: 16px; height: 16px; accent-color: var(--brand); cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .375rem;
  padding: .625rem 1.25rem; border-radius: var(--radius-sm);
  font-size: .9375rem; font-weight: 600; font-family: inherit;
  cursor: pointer; transition: all var(--dur) ease; border: none;
  white-space: nowrap;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); color: #fff; box-shadow: 0 4px 12px rgba(43,163,178,.35); }
.btn-secondary { background: var(--bg); color: var(--text-muted); border: 1.5px solid var(--border); }
.btn-secondary:hover { background: var(--border); color: var(--text); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1.5px solid var(--border); }
.btn-ghost:hover { background: var(--bg); color: var(--text); }
.btn-sm { padding: .4rem .85rem; font-size: .8125rem; border-radius: var(--radius-xs); }
.btn-group { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: 1rem; }

/* Results */
.result-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  margin-bottom: 1rem; box-shadow: var(--shadow-sm);
}
.result-card-title {
  font-size: .8125rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--text-muted); margin-bottom: 1rem;
  padding-bottom: .625rem; border-bottom: 1px solid var(--border);
}
.result-table { width: 100%; border-collapse: collapse; }
.result-table tr:not(:last-child) td { border-bottom: 1px solid var(--border); }
.result-table td { padding: .625rem .75rem; font-size: .875rem; vertical-align: top; }
.result-table td:first-child { font-weight: 600; color: var(--text-muted); width: 38%; white-space: nowrap; }
.result-table td:last-child { color: var(--text); word-break: break-all; }
.mono { font-family: 'SFMono-Regular', Consolas, 'Courier New', monospace; font-size: .8125rem !important; }

/* Code block */
.code-block {
  background: #0f172a; color: #e2e8f0;
  border-radius: var(--radius-sm); padding: 1rem 1.25rem;
  font-family: 'SFMono-Regular', Consolas, 'Courier New', monospace;
  font-size: .8125rem; line-height: 1.75; overflow-x: auto; white-space: pre;
}
.code-block-wrap { position: relative; }
.copy-btn {
  position: absolute; top: .625rem; right: .625rem;
  background: rgba(255,255,255,.08); color: #94a3b8; border: 1px solid rgba(255,255,255,.12);
  border-radius: 6px; padding: .25rem .6rem; font-size: .75rem; font-family: inherit;
  cursor: pointer; transition: all var(--dur) ease;
}
.copy-btn:hover { background: rgba(255,255,255,.15); color: #fff; }

/* Alerts */
.alert {
  padding: .875rem 1rem; border-radius: var(--radius-sm);
  font-size: .875rem; margin-bottom: 1rem;
  display: flex; align-items: flex-start; gap: .5rem; line-height: 1.5;
}
.alert-error   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-info    { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }

/* Tag / pill */
.tag {
  display: inline-block; font-size: .75rem; font-weight: 600;
  padding: .2rem .55rem; border-radius: 999px;
  background: var(--bg); color: var(--text-muted); border: 1px solid var(--border);
}
.tag-green  { background: #f0fdf4; color: #16a34a; border-color: #bbf7d0; }
.tag-red    { background: #fef2f2; color: #dc2626; border-color: #fecaca; }
.tag-blue   { background: #eff6ff; color: #2563eb; border-color: #bfdbfe; }
.tag-yellow { background: #fffbeb; color: #d97706; border-color: #fde68a; }

/* ─── Sidebar ──────────────────────────────────────────────── */
.sidebar-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem; margin-bottom: 1rem;
}
.sidebar-box-title {
  font-size: .75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-muted); margin-bottom: .75rem;
}
.sidebar-tool-link {
  display: flex; align-items: center; gap: .5rem;
  padding: .4rem .5rem; border-radius: var(--radius-sm);
  font-size: .8125rem; color: var(--text-muted); text-decoration: none;
  transition: all var(--dur) ease;
}
.sidebar-tool-link:hover { background: var(--bg); color: var(--brand); }
.sidebar-tool-link.active { background: var(--brand-light); color: var(--brand); font-weight: 600; }
.sidebar-tool-icon { font-size: .875rem; }

/* ─── Reference tables (HTTP codes) ──────────────────────── */
.ref-section { margin-bottom: 2rem; }
.ref-section-title {
  font-size: 1.0625rem; font-weight: 700; color: var(--text);
  margin-bottom: .75rem; display: flex; align-items: center; gap: .5rem;
}
.ref-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.ref-table th {
  background: var(--bg); padding: .5rem .75rem; text-align: left;
  font-size: .75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .05em; color: var(--text-muted);
  border-bottom: 2px solid var(--border);
}
.ref-table td { padding: .625rem .75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.ref-table tr:last-child td { border-bottom: none; }
.ref-table tr:hover td { background: var(--bg); }
.code-badge {
  display: inline-block; font-family: monospace; font-size: .875rem; font-weight: 700;
  padding: .15rem .5rem; border-radius: 4px; margin-right: .25rem;
}

/* ─── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: var(--surface); border-top: 1px solid var(--border);
  padding: 1.25rem 1.5rem; margin-top: auto;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .75rem;
}
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { font-size: .8125rem; color: var(--text-muted); }
.footer-links a:hover { color: var(--brand); }
.footer-copy { font-size: .8125rem; color: var(--text-light); }

/* ─── Divider ──────────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--border); margin: 1.25rem 0; }

/* ─── Utility ──────────────────────────────────────────────── */
.text-muted { color: var(--text-muted); }
.text-mono  { font-family: 'SFMono-Regular', Consolas, monospace; font-size: .85em; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.w-full { width: 100%; }

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .tool-layout { flex-direction: column; padding: 1.5rem 1rem; }
  .tool-sidebar { width: 100%; position: static; }
}
@media (max-width: 640px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
  .site-nav a:nth-child(n+2) { display: none; }
  .hero { padding: 2.5rem 1rem 2rem; }
  .tools-section { padding: 1.5rem 1rem 2rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 420px) {
  .tools-grid { grid-template-columns: 1fr; }
}