/* =====================================================
   tools.nullstack.com — Global Stylesheet
   ===================================================== */

:root {
  /* Light theme (default) */
  --bg:           #f4f6fb;
  --surface:      #ffffff;
  --surface2:     #eef1f8;
  --border:       #d4d9e8;
  --accent:       #1a72c4;
  --accent-hover: #1460a8;
  --accent-glow:  rgba(26,114,196,0.12);
  --text:         #1a1d27;
  --text-muted:   #4a5580;
  --text-dim:     #8892b0;
  --green:        #16a34a;
  --yellow:       #d97706;
  --red:          #dc2626;
  --purple:       #7c3aed;
  --cyan:         #0891b2;
  --orange:       #ea580c;
  --radius:       12px;
  --radius-sm:    8px;
}

/* Dark theme */
body.dark {
  --bg:           #0f1117;
  --surface:      #1a1d27;
  --surface2:     #222536;
  --border:       #2e3148;
  --accent:       #2d8fe0;
  --accent-hover: #4aa5f0;
  --accent-glow:  rgba(45,143,224,0.15);
  --text:         #e8eaf6;
  --text-muted:   #7b82a8;
  --text-dim:     #4a5080;
  --green:        #22c55e;
  --yellow:       #f59e0b;
  --red:          #ef4444;
  --purple:       #a855f7;
  --cyan:         #06b6d4;
  --orange:       #f97316;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background .2s, color .2s;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ── TOP NAV ── */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 24px;
  display: flex; align-items: center; gap: 20px;
  height: 60px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px; color: var(--text);
  text-decoration: none; flex-shrink: 0;
}
.logo-img {
  height: 28px;
  width: auto;
  display: block;
}
.logo em { color: var(--accent); font-style: normal; }

.nav-search {
  flex: 1; max-width: 360px;
  display: flex; align-items: center; gap: 8px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 0 12px 0 10px;
  transition: border-color .2s;
}
.nav-search:focus-within { border-color: var(--accent); }
.nav-search input,
.nav-search input[type="text"] {
  flex: 1; min-width: 0;
  background: transparent; border: none; outline: none;
  box-shadow: none; appearance: none; -webkit-appearance: none;
  padding: 7px 0;
  color: var(--text); font-size: 13px;
}
.nav-search input::placeholder { color: var(--text-dim); }
.search-icon {
  width: 14px; height: 14px; flex-shrink: 0;
  color: var(--text-dim); pointer-events: none; display: block;
}

.nav-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn {
  background: none; border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 12px;
  color: var(--text-muted); cursor: pointer; font-size: 13px;
  transition: all .2s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ── CATEGORY TABS ── */
.tabs-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.tabs-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 24px; display: flex; gap: 2px; overflow-x: auto;
}
.tab-link {
  padding: 11px 18px; font-size: 13px; font-weight: 500;
  color: var(--text-muted); cursor: pointer; white-space: nowrap;
  border-bottom: 2px solid transparent; border-top: none;
  border-left: none; border-right: none;
  background: none; text-decoration: none;
  display: flex; align-items: center; gap: 7px;
  transition: all .2s;
}
.tab-link:hover { color: var(--text); }
.tab-link.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }

/* ── PAGE WRAPPER ── */
.page-wrap {
  max-width: 1280px; margin: 0 auto; padding: 32px 24px;
}

/* ── BREADCRUMB ── */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-dim); margin-bottom: 24px;
}
.breadcrumb a { color: var(--text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text-dim); }

/* ── TOOL HEADER ── */
.tool-hero {
  display: flex; align-items: flex-start; gap: 18px;
  margin-bottom: 32px;
}
.tool-hero-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; flex-shrink: 0;
}
.tool-hero h1 { font-size: 26px; font-weight: 700; margin-bottom: 6px; }
.tool-hero p  { font-size: 14px; color: var(--text-muted); line-height: 1.5; }

/* ── CARDS / PANELS ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.card + .card { margin-top: 16px; }
.card-title {
  font-size: 13px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-dim); margin-bottom: 18px;
}

/* ── FORM ELEMENTS ── */
.field { margin-bottom: 16px; }
.field label {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--text-muted); margin-bottom: 6px;
}
.input-row { display: flex; gap: 8px; }
.input-row input, .input-row select,
input[type="number"], input[type="text"], select {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 12px;
  color: var(--text); font-size: 14px; outline: none;
  transition: border-color .2s; width: 100%;
}
.input-row input:focus, .input-row select:focus,
input[type="number"]:focus, input[type="text"]:focus, select:focus {
  border-color: var(--accent);
}
select { cursor: pointer; }
.input-row input { flex: 1; }
.input-row select { flex: 0 0 auto; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; cursor: pointer;
  border: none; transition: all .2s;
}
.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  background: var(--surface2); color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ── RESULT BOX ── */
.result-box {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 16px 20px;
  margin-top: 8px;
}
.result-value {
  font-size: 32px; font-weight: 800; color: var(--accent);
  line-height: 1.1;
}
.result-label {
  font-size: 12px; color: var(--text-dim); margin-top: 4px;
}

/* ── GRID HELPERS ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
@media (max-width: 700px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ── DIVIDER ── */
.divider { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

/* ── BADGE ── */
.badge {
  display: inline-block; padding: 3px 9px; border-radius: 20px;
  font-size: 11px; font-weight: 600;
}
.badge-blue   { background: var(--accent-glow); color: var(--accent); }
.badge-yellow { background: rgba(245,158,11,.12); color: var(--yellow); }
.badge-green  { background: rgba(34,197,94,.12); color: var(--green); }

/* ── TABLE ── */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th {
  text-align: left; padding: 8px 12px;
  color: var(--text-dim); font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: .5px;
  border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: 10px 12px; border-bottom: 1px solid var(--border);
  color: var(--text);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface2); }

/* ── TOOL GRID (home & category pages) ── */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all .2s;
  position: relative;
  overflow: hidden;
  display: flex; flex-direction: column; gap: 12px;
}
.tool-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--card-accent, var(--accent));
  opacity: 0; transition: opacity .2s;
}
.tool-card:hover {
  border-color: var(--card-accent, var(--accent));
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
}
body.dark .tool-card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,.4);
}
.tool-card:hover::before { opacity: 1; }
.tool-card.coming-soon { opacity: 0.55; cursor: default !important; }
.tool-card.coming-soon:hover { transform: none; box-shadow: none; border-color: var(--border); }
.tool-card.coming-soon::before { display: none; }

.tool-header {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 8px;
}
.tool-icon-wrap {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.tool-status {
  font-size: 11px; font-weight: 600; letter-spacing: .4px;
  padding: 3px 8px; border-radius: 20px;
  background: var(--surface2); color: var(--text-dim);
  white-space: nowrap;
}
.tool-status.soon  { background: rgba(245,158,11,.12); color: var(--yellow); }
.tool-status.live  { background: rgba(34,197,94,.12);  color: var(--green);  }
.tool-status.ai    { background: rgba(168,85,247,.15); color: var(--purple); }

.tool-name { font-size: 16px; font-weight: 600; color: var(--text); }
.tool-desc { font-size: 13px; color: var(--text-muted); line-height: 1.5; }
.tool-footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: auto; padding-top: 8px;
  border-top: 1px solid var(--border);
}
.tool-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.tag {
  font-size: 11px; padding: 2px 8px;
  border-radius: 4px; background: var(--surface2); color: var(--text-dim);
}
.tool-arrow {
  color: var(--text-dim); font-size: 16px;
  transition: transform .2s, color .2s;
}
.tool-card:hover .tool-arrow { color: var(--accent); transform: translateX(4px); }

/* ── CATEGORY SECTIONS ── */
.cat-section { display: none; }
.cat-section.active { display: block; }

.cat-header {
  display: flex; align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px; gap: 16px;
}
.cat-title {
  font-size: 26px; font-weight: 700;
  display: flex; align-items: center; gap: 12px;
}
.cat-badge {
  font-size: 13px; font-weight: 500;
  padding: 3px 10px; border-radius: 20px;
  background: var(--accent-glow); color: var(--accent);
}
.cat-desc { color: var(--text-muted); font-size: 14px; margin-top: 6px; }

.section-label {
  font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--text-dim);
  margin: 28px 0 14px;
}

/* ── HERO ── */
.hero { text-align: center; padding: 48px 24px 40px; }
.hero h1 {
  font-size: 40px; font-weight: 800;
  line-height: 1.2; margin-bottom: 16px;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--accent), #0891b2);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 16px; color: var(--text-muted);
  max-width: 500px; margin: 0 auto 32px;
}
.hero-search { max-width: 540px; margin: 0 auto; display: flex; gap: 8px; }
.hero-search input {
  flex: 1; background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 16px; color: var(--text); font-size: 15px; outline: none;
}
.hero-search input:focus { border-color: var(--accent); }
.hero-search button {
  background: var(--accent); border: none; border-radius: 10px;
  padding: 12px 20px; color: #fff; font-weight: 600;
  cursor: pointer; font-size: 14px;
}

/* ── STATS ROW ── */
.stats-row { display: flex; gap: 12px; margin-bottom: 32px; flex-wrap: wrap; }
.stat-chip {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 16px;
  display: flex; align-items: center; gap: 10px; font-size: 13px;
}
.stat-chip strong { color: var(--accent); font-size: 18px; font-weight: 700; }
.stat-chip span   { color: var(--text-muted); }

/* ── AI BANNER ── */
.ai-banner {
  background: linear-gradient(135deg, rgba(168,85,247,.12), rgba(79,127,255,.1));
  border: 1px solid rgba(168,85,247,.3);
  border-radius: var(--radius); padding: 24px 28px;
  margin-bottom: 28px; display: flex; align-items: center; gap: 20px;
}
.ai-banner-icon { font-size: 36px; flex-shrink: 0; }
.ai-banner h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.ai-banner p  { font-size: 14px; color: var(--text-muted); }
.ai-banner-btn {
  margin-left: auto; flex-shrink: 0;
  border: none; border-radius: 8px; padding: 10px 20px;
  font-size: 14px; font-weight: 600; cursor: default;
}

@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  .ai-banner { flex-direction: column; }
  .ai-banner-btn { margin-left: 0; width: 100%; }
}

/* ── FOOTER ── */
.site-footer {
  text-align: center; padding: 32px 24px;
  color: var(--text-dim); font-size: 12px;
  border-top: 1px solid var(--border); margin-top: 48px;
}
.site-footer a { color: var(--text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }

/* ── PRESET CHIPS ── */
.preset-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.preset-chip {
  padding: 5px 12px; border-radius: 20px; font-size: 12px;
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--text-muted); cursor: pointer; transition: all .15s;
}
.preset-chip:hover { border-color: var(--accent); color: var(--accent); }
.preset-chip.active { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }

/* ── TOOLTIP ── */
[data-tip] { position: relative; cursor: help; }
[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute; bottom: calc(100% + 6px); left: 50%;
  transform: translateX(-50%);
  background: #111; color: #eee; font-size: 11px;
  padding: 5px 10px; border-radius: 6px; white-space: nowrap;
  pointer-events: none; z-index: 10;
}