/* ToolPitara — shared stylesheet. System fonts only, no external assets. */

:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #eef1f5;
  --text: #17202b;
  --text-soft: #4c5a6a;
  --border: #d8dee6;
  --brand: #0b6e4f;
  --brand-strong: #095c42;
  --brand-soft: #e2f2ec;
  --warn-bg: #fdf3e0;
  --warn-text: #7a5410;
  --error: #b3261e;
  --focus: #1a73e8;
  --shadow: 0 1px 3px rgba(16, 30, 44, 0.10);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #10151c;
  --surface: #182030;
  --surface-2: #202a3d;
  --text: #e8edf3;
  --text-soft: #a9b6c6;
  --border: #2e3a4f;
  --brand: #3ecf9a;
  --brand-strong: #6fe0b4;
  --brand-soft: #143327;
  --warn-bg: #3a2f16;
  --warn-text: #f0cf8a;
  --error: #ff9d97;
  --focus: #8ab4f8;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--brand-strong); }
a:hover { text-decoration-thickness: 2px; }

a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.header-in { display: flex; align-items: center; gap: 16px; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; }
.logo { font-size: 1.35rem; font-weight: 800; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
.logo span { color: var(--brand); }
.main-nav { margin-left: auto; }
.main-nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.main-nav a {
  display: inline-block; padding: 8px 12px; border-radius: 8px;
  color: var(--text); text-decoration: none; font-weight: 600;
}
.main-nav a:hover { background: var(--surface-2); }
.main-nav a[aria-current="page"] { background: var(--brand-soft); color: var(--brand-strong); }
.theme-btn {
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  border-radius: 8px; padding: 8px 12px; font: inherit; font-weight: 600; cursor: pointer;
}
.theme-btn:hover { border-color: var(--brand); }

/* Hero + search */
.hero { padding: 40px 0 8px; text-align: center; }
.hero h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 10px; letter-spacing: -0.02em; }
.hero p { color: var(--text-soft); max-width: 640px; margin: 0 auto 20px; }
.search-box { max-width: 560px; margin: 0 auto; text-align: left; }
.search-box label { font-weight: 700; display: block; margin-bottom: 6px; }
.search-box input {
  width: 100%; padding: 13px 14px; font: inherit; border-radius: 10px;
  border: 1.5px solid var(--border); background: var(--surface); color: var(--text);
}
.no-results { text-align: center; color: var(--text-soft); padding: 18px 0; }

.trust-strip {
  margin: 26px 0 6px; background: var(--brand-soft); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 16px; text-align: center; font-weight: 600;
}

/* Category + cards */
.category { padding: 22px 0 4px; }
.category h2 { font-size: 1.3rem; margin: 0 0 4px; }
.category .cat-sub { color: var(--text-soft); margin: 0 0 14px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.tool-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 6px;
}
.tool-card h3 { margin: 0; font-size: 1.08rem; }
.tool-card p { margin: 0; color: var(--text-soft); flex: 1; }
.tool-card .go { font-weight: 700; text-decoration: none; }
.tool-card .go:hover { text-decoration: underline; }
.badge {
  align-self: flex-start; font-size: 0.78rem; font-weight: 700; padding: 3px 9px;
  border-radius: 999px; background: var(--surface-2); color: var(--text-soft);
  border: 1px solid var(--border);
}
.badge.soon { background: var(--warn-bg); color: var(--warn-text); }

/* Content pages */
main { padding-bottom: 40px; }
.page-head { padding: 30px 0 4px; }
.page-head h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.02em; }
.lede { color: var(--text-soft); max-width: 720px; margin: 0; }
.prose { max-width: 760px; }
.prose h2 { font-size: 1.35rem; margin: 30px 0 8px; }
.prose h3 { font-size: 1.1rem; margin: 22px 0 6px; }
.prose p, .prose li { color: var(--text); }
.prose ul, .prose ol { padding-left: 22px; }
.formula {
  background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--brand);
  border-radius: 8px; padding: 14px 16px; font-size: 1.05rem; overflow-x: auto;
}
.note {
  background: var(--warn-bg); color: var(--warn-text); border-radius: 10px;
  padding: 13px 16px; margin: 20px 0; font-weight: 600; max-width: 760px;
}

/* Tool layout */
.tool-layout { display: grid; grid-template-columns: 1fr; gap: 18px; margin-top: 20px; }
@media (min-width: 860px) { .tool-layout { grid-template-columns: 5fr 6fr; align-items: start; } }
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 20px; box-shadow: var(--shadow);
}
.panel h2 { margin-top: 0; font-size: 1.2rem; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 700; margin-bottom: 6px; }
.field .hint { font-weight: 400; color: var(--text-soft); font-size: 0.9rem; }
.field input, .field select {
  width: 100%; padding: 11px 12px; font: inherit; border-radius: 9px;
  border: 1.5px solid var(--border); background: var(--surface); color: var(--text);
}
.field input[aria-invalid="true"] { border-color: var(--error); }
.error-text { color: var(--error); font-weight: 600; margin: 6px 0 0; min-height: 1.2em; }
.toggle-row { display: flex; gap: 8px; flex-wrap: wrap; }
.toggle-row button {
  flex: 1; padding: 10px; font: inherit; font-weight: 700; cursor: pointer;
  border-radius: 9px; border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text);
}
.toggle-row button[aria-pressed="true"] { background: var(--brand); border-color: var(--brand); color: #ffffff; }
[data-theme="dark"] .toggle-row button[aria-pressed="true"] { color: #0c1a14; }
.btn {
  display: inline-block; padding: 11px 18px; font: inherit; font-weight: 700; cursor: pointer;
  border-radius: 9px; border: 1.5px solid var(--brand); background: var(--brand); color: #ffffff;
}
[data-theme="dark"] .btn { color: #0c1a14; }
.btn.secondary { background: transparent; color: var(--brand-strong); }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }
.copy-msg { font-weight: 700; color: var(--brand-strong); min-height: 1.2em; margin: 8px 0 0; }

.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.result-item { background: var(--surface-2); border-radius: 10px; padding: 12px 14px; }
.result-item .k { font-size: 0.86rem; color: var(--text-soft); font-weight: 600; }
.result-item .v { font-size: 1.25rem; font-weight: 800; }
.result-item.big { grid-column: 1 / -1; }
.result-item.big .v { font-size: 1.7rem; color: var(--brand-strong); }
canvas.chart { width: 100%; height: auto; display: block; }
.chart-cap { font-size: 0.88rem; color: var(--text-soft); text-align: center; margin: 8px 0 0; }
.legend { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; font-size: 0.92rem; margin-top: 6px; }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 6px; }

.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; background: var(--surface); }
caption { text-align: left; font-weight: 700; padding: 8px 0; }
th, td { border: 1px solid var(--border); padding: 9px 11px; text-align: right; }
th:first-child, td:first-child { text-align: left; }
thead th { background: var(--surface-2); }

/* FAQ */
.faq details { border: 1px solid var(--border); border-radius: 10px; background: var(--surface); padding: 4px 16px; margin-bottom: 10px; max-width: 760px; }
.faq summary { font-weight: 700; cursor: pointer; padding: 10px 0; }
.faq details p { margin: 0 0 12px; color: var(--text-soft); }

/* Related tools */
.related { margin-top: 34px; max-width: 760px; }
.related ul { display: flex; gap: 10px; flex-wrap: wrap; list-style: none; padding: 0; }
.related a {
  display: inline-block; padding: 10px 14px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface); font-weight: 700; text-decoration: none;
}
.related a:hover { border-color: var(--brand); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); margin-top: 20px; }
.footer-in { padding-top: 22px; padding-bottom: 26px; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; list-style: none; margin: 0 0 10px; padding: 0; }
.footer-links a { color: var(--text); text-decoration: none; font-weight: 600; }
.footer-links a:hover { text-decoration: underline; }
.site-footer p { color: var(--text-soft); margin: 4px 0; font-size: 0.94rem; }

.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--surface); color: var(--text);
  padding: 10px 14px; z-index: 20; font-weight: 700;
}
.skip-link:focus { left: 8px; top: 8px; }

@media (max-width: 560px) {
  .hero h1 { font-size: 1.6rem; }
  .page-head h1 { font-size: 1.55rem; }
  .result-grid { grid-template-columns: 1fr; }
}

/* ---- Premium finish: brand mark, depth, rhythm ---- */
::selection { background: var(--brand); color: #ffffff; }

.logo { display: inline-flex; align-items: center; gap: 9px; }
.logo-mark { flex: none; display: block; }
.logo-mark .lm-star { fill: #e08a00; }
.logo-mark .lm-lid { fill: var(--brand); }
.logo-mark .lm-box { fill: var(--brand); opacity: 0.78; }

.site-header { box-shadow: 0 1px 0 rgba(16, 30, 44, 0.03), 0 6px 18px -12px rgba(16, 30, 44, 0.25); }

.hero {
  background: linear-gradient(180deg, var(--brand-soft), transparent 78%);
  border-radius: 0 0 22px 22px;
  padding-left: 12px; padding-right: 12px;
}
.hero h1 { font-weight: 800; }

.tool-card { transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease; }
.tool-card:hover { transform: translateY(-3px); border-color: var(--brand); box-shadow: 0 10px 24px -12px rgba(16, 30, 44, 0.28); }

.panel { border-radius: 14px; }
.note { border: 1px solid var(--border); }

.btn { transition: background 0.12s ease, transform 0.12s ease; }
.btn:hover { background: var(--brand-strong); border-color: var(--brand-strong); color: #ffffff; }
[data-theme="dark"] .btn:hover { color: #0c1a14; }
.btn.secondary:hover { background: var(--brand-soft); color: var(--brand-strong); }

.footer-brand { display: flex; align-items: center; gap: 8px; font-size: 1.05rem; margin-bottom: 12px; }
.footer-in { padding-top: 26px; }

.faq details { transition: border-color 0.12s ease; }
.faq details:hover { border-color: var(--brand); }

.prose h2 { letter-spacing: -0.01em; }
input::placeholder { color: var(--text-soft); opacity: 0.75; }