/* Flash Free Tools - base styles */
:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-border: #e2e8f0;
  --radius: 10px;
  --max-width: 1100px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
header.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-weight: 900;
  font-size: 1.55rem;
  color: var(--color-text);
  letter-spacing: -0.5px;
}
.logo span { color: var(--color-primary); }

nav.primary-nav ul {
  list-style: none;
  display: flex;
  gap: 0.7rem;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
  align-items: center;
}

nav.primary-nav a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.82rem;
  white-space: nowrap;
}
nav.primary-nav a:hover { color: var(--color-primary); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}

@media (max-width: 820px) {
  .nav-wrap { flex-wrap: wrap; gap: 0.5rem; }
  .nav-toggle { display: block; }
  nav.primary-nav {
    width: 100%;
    display: none;
  }
  nav.primary-nav.open { display: block; }
  nav.primary-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
  }
  nav.primary-nav ul li a {
    display: block;
    padding: 0.5rem 0;
    font-size: 0.95rem;
  }
}

/* Hero */
.hero {
  text-align: center;
  padding: 3rem 1.25rem 2rem;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 0.6rem;
}
.hero p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

/* Tool grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.1rem;
  margin: 2rem 0;
}

.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.4rem;
  display: block;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  text-decoration: none;
}
.tool-card .icon { font-size: 1.8rem; }
.tool-card h3 { margin: 0.5rem 0 0.3rem; color: var(--color-text); }
.tool-card p { margin: 0; color: var(--color-text-muted); font-size: 0.92rem; }

/* Tool widget panel */
.tool-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0 2.5rem;
}

.field-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 0.9rem; }
.field-row label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 0.3rem; }
.field-row .field { flex: 1; min-width: 160px; }

input, select, textarea, button {
  font-family: inherit;
  font-size: 1rem;
}

input[type="text"], input[type="number"], input[type="password"], select, textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #fff;
}

textarea { resize: vertical; min-height: 110px; }

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 0.65rem 1.2rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--color-primary-dark); }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-bg); }

.result-box {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 6px;
  font-weight: 600;
  word-break: break-word;
}

/* Article / content sections */
.content-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.6rem 1.8rem;
  margin: 1.5rem 0;
}
.content-block h2 { margin-top: 0; }
.content-block h2:not(:first-child) { margin-top: 1.6rem; }

.faq dt { font-weight: 700; margin-top: 1rem; }
.faq dd { margin: 0.3rem 0 0; color: var(--color-text-muted); }

/* Ad slots */
.ad-slot {
  margin: 0 auto;
  text-align: center;
  max-width: var(--max-width);
}
.ad-slot:empty,
.ad-slot ins:empty { display: none; }

/* Breadcrumbs */
.breadcrumbs {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 1rem 0;
}
.breadcrumbs a { color: var(--color-text-muted); }

/* Footer */
footer.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  margin-top: 3rem;
  padding: 2.5rem 1.25rem 1.5rem;
}
.footer-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
}
.footer-wrap h4 { color: #fff; margin-bottom: 0.6rem; font-size: 0.95rem; }
.footer-wrap ul { list-style: none; margin: 0; padding: 0; }
.footer-wrap li { margin-bottom: 0.4rem; }
.footer-wrap a { color: #94a3b8; font-size: 0.9rem; }
.footer-wrap a:hover { color: #fff; }
.footer-bottom {
  max-width: var(--max-width);
  margin: 1.8rem auto 0;
  border-top: 1px solid #1e293b;
  padding-top: 1.2rem;
  font-size: 0.82rem;
  color: #64748b;
  text-align: center;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: #fff;
  padding: 0.6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* Tabs */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--color-border); margin-bottom: 1.2rem; }
.tab-btn { padding: 0.6rem 1.1rem; border: none; background: none; cursor: pointer; font-weight: 600; color: var(--color-text-muted); border-bottom: 2px solid transparent; margin-bottom: -2px; font-family: inherit; font-size: 0.95rem; }
.tab-btn.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* Calculator category grid */
.calc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.calc-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.3rem; display: block; text-align: center; transition: transform 0.15s, box-shadow 0.15s; }
.calc-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,23,42,.08); text-decoration: none; }
.calc-card .icon { font-size: 2rem; display: block; margin-bottom: 0.5rem; }
.calc-card h3 { margin: 0 0 0.3rem; font-size: 1rem; color: var(--color-text); }
.calc-card p { margin: 0; font-size: 0.82rem; color: var(--color-text-muted); }

/* Calc sub-page: list of calculators */
.calc-list { display: grid; gap: 1.5rem; }

/* Color swatch */
.color-swatch { width: 80px; height: 80px; border-radius: 10px; border: 1px solid var(--color-border); display: inline-block; vertical-align: middle; margin-right: 1rem; }

/* Char freq table */
.freq-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.freq-table th, .freq-table td { text-align: left; padding: 0.3rem 0.5rem; border-bottom: 1px solid var(--color-border); }
.freq-bar { display: inline-block; background: var(--color-primary); height: 10px; border-radius: 3px; vertical-align: middle; }

/* Range input full-width */
input[type="range"] { width: 100%; cursor: pointer; }

/* Passphrase word pills */
.word-pills { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.8rem; }
.word-pill { background: #eff6ff; color: var(--color-primary); padding: 0.3rem 0.7rem; border-radius: 20px; font-weight: 600; font-size: 0.95rem; }

/* JSON output */
#json-output { font-family: "Fira Mono", "Courier New", monospace; font-size: 0.88rem; white-space: pre; max-height: 340px; overflow: auto; }