/* ==========================================================================
   Idiot Color Tools — main stylesheet
   Design tokens: indigo/slate SaaS palette
   ========================================================================== */

:root {
  --ink-900: #0f172a;
  --ink-700: #334155;
  --ink-500: #64748b;
  --ink-300: #cbd5e1;
  --ink-100: #f1f5f9;
  --paper: #f8fafc;
  --card: #ffffff;
  --line: #e2e8f0;

  --indigo-700: #4338ca;
  --indigo-600: #4f46e5;
  --indigo-500: #6366f1;
  --indigo-100: #e0e7ff;
  --violet-500: #7c3aed;
  --cyan-500: #06b6d4;

  --success: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);

  --font-display: "Sora", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink-900);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}

code, .mono { font-family: var(--font-mono); }

.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

:focus-visible {
  outline: 3px solid var(--indigo-500);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ---------------- Header ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  color: var(--ink-900);
  white-space: nowrap;
}
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--indigo-600), var(--violet-500) 60%, var(--cyan-500));
  flex-shrink: 0;
}
.main-nav { display: flex; gap: 4px; margin-left: 4px; }
.main-nav a {
  text-decoration: none;
  color: var(--ink-700);
  font-size: 14.5px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
}
.main-nav a:hover, .main-nav a.active { background: var(--indigo-100); color: var(--indigo-700); }

.header-search { position: relative; margin-left: auto; width: 280px; }
.header-search input[type="text"] {
  width: 100%;
  padding: 9px 14px 9px 36px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 14px;
  font-family: var(--font-body);
}
.header-search input[type="text"]:focus { border-color: var(--indigo-500); }
.header-search svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--ink-500); pointer-events: none; }
.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 360px;
  overflow-y: auto;
  display: none;
  z-index: 60;
}
.search-dropdown.show { display: block; }
.search-dropdown a {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
.search-dropdown a:last-child { border-bottom: none; }
.search-dropdown a:hover { background: var(--indigo-100); }
.search-dropdown strong { font-size: 14px; color: var(--ink-900); }
.search-dropdown span { font-size: 12.5px; color: var(--ink-500); }
.search-empty { padding: 14px; font-size: 13.5px; color: var(--ink-500); }

.nav-toggle { display: none; background: none; border: 0; padding: 6px; cursor: pointer; }

/* ---------------- Hero ---------------- */
.hero {
  padding: 64px 0 48px;
  background:
    radial-gradient(600px 300px at 15% -10%, rgba(99,102,241,.18), transparent 60%),
    radial-gradient(500px 260px at 90% -10%, rgba(124,58,237,.14), transparent 60%);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--indigo-700);
  background: var(--indigo-100);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  max-width: 820px;
}
.hero .accent { color: var(--indigo-600); }
.hero p.lead {
  font-size: 18px;
  color: var(--ink-700);
  max-width: 640px;
  margin-top: 14px;
}
.hero-search { max-width: 560px; margin-top: 28px; position: relative; }
.hero-search input[type="text"] {
  width: 100%;
  padding: 16px 20px 16px 48px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow-md);
  font-size: 16px;
  font-family: var(--font-body);
}
.hero-search svg { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; color: var(--ink-500); pointer-events: none; }
.hero-stats { display: flex; gap: 28px; margin-top: 30px; flex-wrap: wrap; }
.hero-stats div strong { display: block; font-family: var(--font-display); font-size: 24px; color: var(--ink-900); }
.hero-stats div span { font-size: 13px; color: var(--ink-500); }

/* ---------------- Sections ---------------- */
.section { padding: 56px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.section-head h2 { font-size: clamp(24px, 3vw, 32px); }
.section-head p { color: var(--ink-500); margin: 6px 0 0; max-width: 560px; }

/* ---------------- Tool grid / cards ---------------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.tool-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--indigo-300, #a5b4fc); }
.tool-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--indigo-100);
  color: var(--indigo-700);
}
.tool-icon svg { width: 22px; height: 22px; }
.tool-card h3 { font-size: 17px; margin: 0; }
.tool-card p { font-size: 14px; color: var(--ink-500); margin: 0; }
.tool-card .go { margin-top: auto; font-size: 13px; font-weight: 700; color: var(--indigo-600); display: flex; align-items: center; gap: 6px; }

.category-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--indigo-700);
  background: var(--indigo-100);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}

/* ---------------- Buttons / inputs (tool UI) ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14.5px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-900);
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { border-color: var(--indigo-500); color: var(--indigo-700); }
.btn-primary { background: var(--indigo-600); border-color: var(--indigo-600); color: #fff; }
.btn-primary:hover { background: var(--indigo-700); border-color: var(--indigo-700); color: #fff; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

input[type=text], input[type=number], input[type=search], select, textarea {
  font-family: var(--font-body);
  font-size: 14.5px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-900);
}
input[type=color] { border: 1px solid var(--line); border-radius: 10px; width: 52px; height: 40px; padding: 3px; background: var(--card); cursor: pointer; }
input[type=range] { width: 100%; accent-color: var(--indigo-600); }
label { font-size: 13px; font-weight: 700; color: var(--ink-700); display: block; margin-bottom: 6px; }
.field { margin-bottom: 16px; }
.field-row { display: flex; gap: 12px; flex-wrap: wrap; }
.field-row > * { flex: 1; min-width: 120px; }

/* ---------------- Tool page layout ---------------- */
.tool-hero {
  padding: 36px 0 8px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--indigo-100), transparent);
}
.tool-hero h1 { font-size: clamp(26px, 4vw, 36px); }
.tool-hero .breadcrumbs { font-size: 13px; color: var(--ink-500); margin-bottom: 14px; }
.tool-hero .breadcrumbs a { color: var(--indigo-600); text-decoration: none; }

.tool-app {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 28px;
  margin: 28px 0 8px;
}
.app-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.app-grid.single { grid-template-columns: 1fr; }
@media (max-width: 760px) { .app-grid { grid-template-columns: 1fr; } }

.preview-box {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  min-height: 220px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  background:
    linear-gradient(45deg, #f1f5f9 25%, transparent 25%),
    linear-gradient(-45deg, #f1f5f9 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #f1f5f9 75%),
    linear-gradient(-45deg, transparent 75%, #f1f5f9 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.swatch-row { display: flex; border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--line); }
.swatch { flex: 1; min-height: 110px; display: flex; align-items: flex-end; padding: 10px; cursor: pointer; position: relative; }
.swatch span { font-family: var(--font-mono); font-size: 12px; background: rgba(255,255,255,.85); padding: 3px 7px; border-radius: 6px; }
.swatch .lock { position: absolute; top: 8px; right: 8px; font-size: 15px; }

.code-out {
  background: var(--ink-900);
  color: #e2e8f0;
  border-radius: var(--radius-md);
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  position: relative;
}
.copy-row { display: flex; justify-content: flex-end; margin-top: 10px; }

.result-line { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: 14.5px; }
.result-line:last-child { border-bottom: none; }
.result-line strong { font-family: var(--font-mono); }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--ink-900); color: #fff; padding: 10px 18px; border-radius: 10px;
  font-size: 13.5px; font-weight: 600; opacity: 0; pointer-events: none; transition: all .2s ease; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------------- Article / FAQ ---------------- */
.article {
  max-width: 820px;
  margin: 0 auto;
  padding: 8px 0 8px;
}
.article h2 { font-size: 22px; margin-top: 40px; }
.article h3 { font-size: 17px; margin-top: 26px; }
.article p { color: var(--ink-700); font-size: 15.5px; }
.article ul { color: var(--ink-700); font-size: 15.5px; padding-left: 20px; }

.faq { border-top: 1px solid var(--line); margin-top: 10px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 18px 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--ink-900);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-q .plus { font-size: 20px; color: var(--indigo-600); transition: transform .2s ease; flex-shrink: 0; }
.faq-item.open .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .2s ease; font-size: 14.5px; color: var(--ink-700); }
.faq-a p { margin: 0 4px 18px; }

/* ---------------- Related tools ---------------- */
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 14px; }

/* ---------------- Footer ---------------- */
.site-footer { background: var(--ink-900); color: var(--ink-300); margin-top: 60px; padding: 52px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h4 { color: #fff; font-size: 13.5px; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-grid a { color: var(--ink-300); text-decoration: none; font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 17px; margin-bottom: 10px; }
.footer-tag { font-size: 13.5px; color: var(--ink-500); max-width: 280px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  margin-top: 40px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-500);
}
.footer-bottom a { color: var(--ink-500); text-decoration: none; }
.footer-bottom a:hover { color: #fff; }

/* ---------------- Static pages ---------------- */
.static-page .wrap { max-width: 820px; }
.static-page h1 { margin-top: 30px; }
.static-page p, .static-page li { color: var(--ink-700); font-size: 15.5px; }

/* ---------------- Category badge grid on home ---------------- */
.badge-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.badge {
  font-size: 13px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--ink-700);
}

/* ---------------- Responsive nav ---------------- */
@media (max-width: 880px) {
  .main-nav { display: none; }
  .header-search { width: 200px; }
}
@media (max-width: 600px) {
  .header-search { display: none; }
  .app-grid { gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; }
}