/* ============================================================
   Utilitool — Shared Stylesheet
   utilitool.app
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg:       #F7F6F2;
  --card:     #FFFFFF;
  --subtle:   #F1EFE8;
  --text-1:   #2C2C2A;
  --text-2:   #5F5E5A;
  --text-3:   #888780;
  --border:   #D3D1C7;
  --border-2: #B4B2A9;

  --g1:       #3B6D11;
  --g1-hover: #27500A;
  --g2:       #639922;
  --g3:       #97C459;
  --gtint:    #EAF3DE;
  --gborder:  #C0DD97;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 14px;
  --radius-pill: 99px;
}

[data-theme="dark"] {
  --bg:       #1A1A18;
  --card:     #252523;
  --subtle:   #222220;
  --text-1:   #EEEEE8;
  --text-2:   #AAAAА0;
  --text-3:   #6A6A64;
  --border:   #393936;
  --border-2: #4A4A46;

  --g1:       #4F8F1A;
  --g1-hover: #3A6A10;
  --g2:       #72A82A;
  --g3:       #97C459;
  --gtint:    #1C2E0E;
  --gborder:  #2E4018;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ---------- Base ---------- */
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s, color 0.2s;
}

/* ---------- Logo ---------- */
.logo-wrap { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.logo-icon {
  background: var(--g1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s;
}
[data-theme="dark"] .logo-icon { background: var(--g2); }
.logo-icon svg { display: block; }
.logo-text {
  font-weight: 500;
  color: var(--text-1);
  letter-spacing: -.02em;
  line-height: 1;
}
.logo-text span { color: var(--g1); }
[data-theme="dark"] .logo-text span { color: var(--g3); }

/* ---------- Nav (Home) ---------- */
.nav-home {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 0.5px solid var(--border);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
.nav-home .logo-icon { width: 28px; height: 28px; }
.nav-home .logo-icon svg { width: 15px; height: 15px; }
.nav-home .logo-text { font-size: 16px; }
.nav-tag {
  font-size: 12px; color: var(--text-3);
  background: var(--card);
  border: 0.5px solid var(--border); border-radius: var(--radius-pill);
  padding: 3px 10px;
}

/* ---------- Nav (Tool pages) ---------- */
.nav-tool {
  display: flex; align-items: center; gap: 8px;
  padding: 1rem 0;
  border-bottom: 0.5px solid var(--border);
  margin-bottom: 2rem;
}
.nav-tool .logo-icon { width: 24px; height: 24px; }
.nav-tool .logo-icon svg { width: 13px; height: 13px; }
.nav-tool .logo-text { font-size: 14px; }
.nav-back {
  margin-left: auto; font-size: 12px; color: var(--text-3);
  text-decoration: none; transition: color 0.15s;
}
.nav-back:hover { color: var(--g1); }

/* ---------- Dark mode toggle ---------- */
.theme-toggle {
  background: none; border: none; cursor: pointer;
  padding: 6px; border-radius: var(--radius-md);
  color: var(--text-3);
  display: flex; align-items: center; justify-content: center;
  transition: color 0.15s, background 0.15s;
  margin-left: 8px;
}
.theme-toggle:hover { color: var(--text-2); background: var(--subtle); }
.theme-toggle svg { width: 16px; height: 16px; display: block; }
.icon-moon { display: block; }
.icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun  { display: block; }

/* ---------- Page container ---------- */
.page-home { max-width: 720px; margin: 0 auto; }
.page-tool { max-width: 520px; margin: 0 auto; padding: 0 1.25rem; }

/* ---------- Headings ---------- */
.tool-title {
  font-size: 26px; font-weight: 500;
  color: var(--text-1); letter-spacing: -.02em;
  margin-bottom: .35rem;
}
.tool-subtitle {
  font-size: 14px; color: var(--text-2);
  margin-bottom: 2rem; line-height: 1.5;
}

/* ---------- Form inputs ---------- */
.field { margin-bottom: 1.25rem; }
.field-label {
  font-size: 12px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: .45rem; display: block;
}
input[type=text],
input[type=number],
input[type=date],
input[type=email],
textarea,
select {
  width: 100%;
  border: 1px solid var(--border-2); border-radius: var(--radius-md);
  padding: 10px 14px; font-size: 15px;
  background: var(--card); color: var(--text-1); outline: none;
  font-family: inherit;
  transition: border-color 0.15s, background 0.2s;
}
input[type=number] { font-size: 16px; -moz-appearance: textfield; }
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; }
input[type=date] { font-size: 15px; }
textarea { resize: vertical; min-height: 140px; line-height: 1.6; }
input:focus, textarea:focus, select:focus { border-color: var(--g2); }
input::placeholder, textarea::placeholder { color: var(--text-3); }

input[type=range] { accent-color: var(--g1); }

/* ---------- Buttons ---------- */
.btn-primary {
  background: var(--g1); color: #fff;
  border: none; border-radius: var(--radius-md);
  padding: 10px 22px; font-size: 14px; font-weight: 500;
  cursor: pointer; font-family: inherit;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--g1-hover); }

.btn-full {
  width: 100%; border-radius: 10px;
  padding: 13px; font-size: 15px; font-weight: 500;
}

.btn-ghost {
  background: var(--card); color: var(--text-2);
  border: 1px solid var(--border-2); border-radius: var(--radius-md);
  padding: 9px 18px; font-size: 13px;
  cursor: pointer; font-family: inherit;
  transition: border-color 0.15s, color 0.15s;
}
.btn-ghost:hover { border-color: var(--g2); color: var(--g1); }

.link-subtle {
  font-size: 13px; color: var(--text-3);
  text-align: center; cursor: pointer;
  transition: color 0.15s;
}
.link-subtle:hover { color: var(--text-2); }

/* ---------- Result cards ---------- */
.result-card {
  background: var(--card);
  border: 0.5px solid var(--border);
  border-radius: 10px; padding: 1rem; text-align: center;
  transition: background 0.2s;
}
.result-card.primary { background: var(--gtint); border-color: var(--gborder); }
.result-label {
  font-size: 11px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: .4rem;
}
.result-card.primary .result-label { color: var(--g1); }
.result-value { font-size: 22px; font-weight: 500; color: var(--text-1); }
.result-card.primary .result-value { color: var(--g1); }

/* ---------- Stat cards (smaller) ---------- */
.stat-card {
  background: var(--card);
  border: 0.5px solid var(--border);
  border-radius: 10px; padding: .85rem; text-align: center;
  transition: background 0.2s;
}
.stat-val { font-size: 18px; font-weight: 500; color: var(--text-1); }
.stat-lbl { font-size: 11px; color: var(--text-3); margin-top: 2px; }

/* ---------- Hero result block ---------- */
.result-hero {
  background: var(--gtint); border-radius: var(--radius-xl);
  padding: 2rem 1.5rem; text-align: center;
  margin-bottom: 1.25rem;
  transition: background 0.2s;
}
.result-hero-num {
  font-weight: 500; color: var(--g1);
  letter-spacing: -.04em; line-height: 1;
}
.result-hero-unit { color: var(--g2); margin-top: .25rem; }
.result-hero-sub  { font-size: 14px; color: var(--g1); margin-top: .75rem; opacity: .8; }

/* ---------- Ad slot ---------- */
.ad-slot {
  margin-top: 2rem;
  min-height: 90px;
  background: var(--card);
  border: 0.5px dashed var(--border); border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; color: var(--border-2);
  text-align: center;
  transition: background 0.2s;
}

/* ---------- Trust bar (home) ---------- */
.trust-bar {
  display: flex; justify-content: center; gap: 24px;
  padding: 1.25rem 1.5rem;
  border-top: 0.5px solid var(--border);
  flex-wrap: wrap;
  background: var(--card);
}
.trust-item { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-3); }
.trust-dot { width: 6px; height: 6px; background: var(--g2); border-radius: 50%; flex-shrink: 0; }

/* ---------- Footer ---------- */
.footer {
  text-align: center; padding: 1.5rem;
  font-size: 12px; color: var(--text-3);
  border-top: 0.5px solid var(--border);
  background: var(--card);
  line-height: 1.8;
}
.footer a { color: var(--g1); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* Footer for tool pages (no bg, just spacing) */
.footer-tool {
  text-align: center; padding: 2rem 0 1.5rem;
  font-size: 12px; color: var(--text-3);
  line-height: 2;
}
.footer-tool a { color: var(--g1); text-decoration: none; }
.footer-tool a:hover { text-decoration: underline; }

/* ---------- FAQ section ---------- */
.faq-section {
  margin-top: 3rem; margin-bottom: 1rem;
  background: var(--card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.25rem .35rem;
  transition: background 0.2s;
}
.faq-section h2 {
  font-size: 11px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: .08em;
  margin-bottom: 1rem;
}
.faq-item { border-top: 0.5px solid var(--border); }
.faq-item:first-of-type { border-top: none; }
.faq-item summary {
  list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: .9rem 0;
  cursor: pointer;
  font-size: 14px; font-weight: 500; color: var(--text-2);
  user-select: none;
  transition: color 0.15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '';
  width: 7px; height: 7px; flex-shrink: 0;
  border-right: 1.5px solid var(--text-3);
  border-bottom: 1.5px solid var(--text-3);
  transform: rotate(45deg); margin-top: -3px;
  transition: transform 0.2s, margin-top 0.2s;
}
.faq-item[open] > summary { color: var(--g1); }
.faq-item[open] > summary::after { transform: rotate(-135deg); margin-top: 2px; }
.faq-a {
  padding: 0 0 1rem;
  font-size: 14px; color: var(--text-2); line-height: 1.7;
}

/* ---------- Logo SVG inline ---------- */
.logo-svg-grid { display: block; }