:root {
  color-scheme: light;
  --ink: #18211b;
  --muted: #5e6b62;
  --paper: #f7f5ef;
  --panel: #ffffff;
  --line: #d9ddd7;
  --accent: #1f5a3e;
  --accent-strong: #16452f;
  --soft: #e9f0eb;
  --warning: #725315;
  --warning-bg: #fff6db;
  --shadow: 0 18px 48px rgba(24, 33, 27, 0.09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
a { color: var(--accent-strong); }
a:hover { text-decoration-thickness: 2px; }
button, input, textarea, select { font: inherit; }
button, input, textarea, select, a { outline-offset: 3px; }
:focus-visible { outline: 3px solid #6d8f79; }

.tool-header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 245, 239, 0.96);
}
.tool-header__inner,
.tool-footer__inner,
.tool-main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}
.tool-header__inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.tool-brand {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.tool-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.tool-nav a { color: var(--muted); text-decoration: none; font-weight: 650; }
.tool-nav a:hover { color: var(--ink); }

.tool-main { padding: 64px 0 80px; }
.tool-hero { max-width: 820px; margin-bottom: 38px; }
.tool-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.025em; }
h1 { font-size: clamp(2.35rem, 7vw, 4.6rem); margin: 0 0 18px; }
h2 { font-size: clamp(1.55rem, 4vw, 2.2rem); margin: 0 0 14px; }
h3 { margin: 0 0 8px; }
.tool-lead { color: var(--muted); font-size: clamp(1.05rem, 2.2vw, 1.28rem); max-width: 760px; }
.tool-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.tool-pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  padding: 7px 11px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
}

.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.tool-card, .tool-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.tool-card { padding: 26px; color: inherit; text-decoration: none; }
.tool-card:hover { transform: translateY(-2px); border-color: #b8c4bc; }
.tool-card p { color: var(--muted); margin-bottom: 0; }
.tool-panel { padding: clamp(20px, 4vw, 34px); margin: 24px 0; }
.tool-panel--soft { background: var(--soft); box-shadow: none; }

.tool-form { display: grid; gap: 18px; }
.tool-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.tool-field { display: grid; gap: 7px; }
.tool-field label, .tool-field legend { font-weight: 750; }
.tool-help { margin: 0; color: var(--muted); font-size: 0.9rem; }
.tool-field input,
.tool-field textarea,
.tool-field select {
  width: 100%;
  border: 1px solid #bcc6be;
  border-radius: 11px;
  background: #fff;
  color: var(--ink);
  padding: 11px 12px;
}
.tool-field textarea { min-height: 150px; resize: vertical; }
.tool-field input:invalid { border-color: #9c5b4d; }
.tool-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.tool-button {
  border: 1px solid var(--accent);
  border-radius: 11px;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  font-weight: 800;
  cursor: pointer;
}
.tool-button:hover { background: var(--accent-strong); }
.tool-button:disabled { opacity: 0.48; cursor: not-allowed; }
.tool-button--secondary { background: #fff; color: var(--accent-strong); }
.tool-button--secondary:hover { background: var(--soft); }
.tool-button--quiet { border-color: var(--line); background: transparent; color: var(--ink); }

.tool-notice {
  border-left: 4px solid var(--accent);
  background: var(--soft);
  padding: 14px 16px;
  border-radius: 10px;
  color: #34453a;
}
.tool-notice--warning { border-left-color: #a47616; background: var(--warning-bg); color: var(--warning); }
.tool-notice p { margin: 0; }

.tool-passage {
  white-space: pre-wrap;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbfcfa;
  padding: 18px;
  font-size: 1.02rem;
}
.tool-results {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}
.tool-metric {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 18px;
}
.tool-metric__value { display: block; font-size: clamp(1.55rem, 4vw, 2.4rem); font-weight: 850; letter-spacing: -0.03em; }
.tool-metric__label { color: var(--muted); font-size: 0.9rem; }
.tool-output {
  min-height: 170px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8faf8;
  padding: 14px;
  white-space: pre-wrap;
}
.tool-section-row { border: 1px solid var(--line); border-radius: 14px; padding: 16px; background: #fbfcfa; }
.tool-section-row + .tool-section-row { margin-top: 12px; }
.tool-section-row__head { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-bottom: 12px; }
.tool-section-row__head strong { font-size: 0.95rem; }

.tool-method { margin-top: 46px; max-width: 800px; }
.tool-method p, .tool-method li { color: var(--muted); }
.tool-related { margin-top: 42px; padding-top: 28px; border-top: 1px solid var(--line); }
.tool-related ul { padding-left: 20px; }
.tool-footer { border-top: 1px solid var(--line); padding: 30px 0 44px; color: var(--muted); }
.tool-footer__inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

@media (max-width: 760px) {
  .tool-header__inner { align-items: flex-start; flex-direction: column; padding: 16px 0; }
  .tool-main { padding-top: 42px; }
  .tool-grid, .tool-form-grid, .tool-results { grid-template-columns: 1fr; }
  .tool-card { padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}