/* ============================================================
   KodSanat Tools — tools.css
   Premium monochrome technical utility design
   Aligned with kodsanat.com design language
   ============================================================ */


/* ── 1. TOKENS ── */
:root {
  /* Light palette */
  --l-bg:       #F2F3F7;
  --l-bg-2:     #ECEDF3;
  --l-surface:  #FFFFFF;
  --l-border:   rgba(0,0,0,0.08);
  --l-border-2: rgba(0,0,0,0.13);
  --l-text:     #0C0C14;
  --l-text-2:   #6B7280;
  --l-text-3:   #9CA3AF;

  /* Dark palette */
  --d-bg:        #080810;
  --d-bg-2:      #0E0F1A;
  --d-surface:   rgba(255,255,255,0.04);
  --d-surface-2: rgba(255,255,255,0.08);
  --d-border:    rgba(255,255,255,0.08);
  --d-border-2:  rgba(255,255,255,0.14);
  --d-text:      #EEEEF6;
  --d-text-2:    rgba(238,238,246,0.55);
  --d-text-3:    rgba(238,238,246,0.28);

  /* Typography */
  --font:      'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SFMono-Regular', 'Cascadia Code', monospace;

  /* Layout */
  --container: 1100px;

  /* Radii */
  --r-xl: 22px;
  --r-lg: 16px;
  --r-md: 11px;
  --r-sm:  7px;
  --r-xs:  4px;

  /* Transitions */
  --t:      0.18s ease;
  --t-slow: 0.36s ease;

  /* Status */
  --c-ok:    #16a34a;
  --c-warn:  #d97706;
  --c-error: #dc2626;
  --c-info:  #4f46e5;
}

/* ── Active theme aliases ── */
html:not([data-theme="dark"]) {
  --bg:      var(--l-bg);
  --bg-2:    var(--l-bg-2);
  --surface: var(--l-surface);
  --border:  var(--l-border);
  --border-2:var(--l-border-2);
  --text:    var(--l-text);
  --text-2:  var(--l-text-2);
  --text-3:  var(--l-text-3);
  --sh:      0 2px 20px rgba(0,0,0,0.06), 0 0 0 1px rgba(0,0,0,0.04);
  --sh-h:    0 8px 40px rgba(0,0,0,0.10), 0 0 0 1px rgba(0,0,0,0.06);
}
html[data-theme="dark"] {
  --bg:      var(--d-bg);
  --bg-2:    var(--d-bg-2);
  --surface: var(--d-surface);
  --border:  var(--d-border);
  --border-2:var(--d-border-2);
  --text:    var(--d-text);
  --text-2:  var(--d-text-2);
  --text-3:  var(--d-text-3);
  --sh:      0 4px 32px rgba(0,0,0,0.5);
  --sh-h:    0 12px 60px rgba(0,0,0,0.6);
}


/* ── 2. RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background var(--t), color var(--t);
}
img, svg { display: block; max-width: 100%; }
ul  { list-style: none; }
a   { color: inherit; text-decoration: none; transition: color var(--t); }
button { cursor: pointer; background: none; border: none; font: inherit; }


/* ── 3. LAYOUT ── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
}
.page-wrap  { min-height: 100vh; display: flex; flex-direction: column; }
.page-main  { flex: 1; }


/* ── 4. NAV ── */
.t-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background var(--t), border-color var(--t);
}
.t-nav__inner {
  display: flex;
  align-items: center;
  height: 58px;
  gap: 1rem;
}

/* Logo */
.t-nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  margin-right: 0.5rem;
}
.t-logo-sq {
  width: 20px; height: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  flex-shrink: 0;
}
.t-logo-sq span {
  border-radius: 2px;
  background: var(--text);
  transition: background var(--t);
}
.t-logo-sq span:nth-child(2),
.t-logo-sq span:nth-child(3) { opacity: 0.28; }
.t-nav__wordmark {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  white-space: nowrap;
}
.t-nav__wordmark em {
  font-style: normal;
  font-weight: 400;
  opacity: 0.45;
  margin-left: 0.2em;
}

/* Desktop links */
.t-nav__links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  flex: 1;
}
.t-nav__link {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  padding: 0.3rem 0.6rem;
  border-radius: var(--r-sm);
  white-space: nowrap;
  transition: color var(--t), background var(--t);
}
.t-nav__link:hover,
.t-nav__link.active {
  color: var(--text);
  background: var(--bg-2);
}

/* Right side controls */
.t-nav__right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

/* Theme button */
.t-theme-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--r-sm);
  color: var(--text-2);
  transition: color var(--t), background var(--t);
}
.t-theme-btn:hover { color: var(--text); background: var(--bg-2); }
html:not([data-theme="dark"]) .icon-moon { display: none; }
html[data-theme="dark"]       .icon-sun  { display: none; }

/* Language */
.t-lang {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  color: var(--text-3);
}
.t-lang__btn {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-3);
  padding: 0.2rem 0.3rem;
  border-radius: var(--r-xs);
  transition: color var(--t);
}
.t-lang__btn:hover,
.t-lang__btn.active { color: var(--text); }

/* Back link */
.t-nav__back {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-3);
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  white-space: nowrap;
  transition: color var(--t), border-color var(--t);
}
.t-nav__back:hover { color: var(--text-2); border-color: var(--border-2); }

/* Hamburger */
.t-nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px; height: 32px;
  align-items: center; justify-content: center;
  border-radius: var(--r-sm);
  color: var(--text-2);
}
.t-nav__burger span {
  display: block;
  width: 18px; height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: var(--t);
}

/* Mobile menu */
.t-nav__mobile {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.5rem 0 0.75rem;
  border-top: 1px solid var(--border);
}
.t-nav__mobile[hidden] { display: none; }
.t-nav__mobile .t-nav__link { padding: 0.55rem 0.5rem; }
.t-nav__mobile-foot {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.5rem 0.25rem;
  border-top: 1px solid var(--border);
  margin-top: 0.25rem;
  font-size: 0.72rem;
  color: var(--text-3);
}
.t-nav__mobile-cta {
  margin-left: auto;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border-2);
  border-radius: var(--r-sm);
  transition: border-color var(--t);
}
.t-nav__mobile-cta:hover { border-color: var(--text-2); }


/* ── 5. PAGE HEADER ── */
.t-page-header {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}
.t-page-header .overline {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  font-family: var(--font-mono);
  margin-bottom: 0.75rem;
}
.t-page-header h1 {
  font-size: clamp(1.65rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--text);
  line-height: 1.15;
  margin-bottom: 0.75rem;
}
.t-page-header .lead {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 600px;
  line-height: 1.7;
}


/* ── 6. TOOL FORM ── */
.t-tool-section {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
}
.t-form {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: flex-end;
}
.t-form__group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  min-width: 200px;
  max-width: 360px;
}
.t-form__group label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.02em;
}
.t-input {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 0.6rem 0.9rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  outline: none;
  min-width: 0;
  transition: border-color var(--t), box-shadow var(--t);
}
.t-input:focus {
  border-color: rgba(100,100,130,0.4);
  box-shadow: 0 0 0 3px rgba(100,100,130,0.07);
}
.t-input::placeholder { color: var(--text-3); }

.t-btn-check {
  padding: 0.62rem 1.6rem;
  background: var(--text);
  color: var(--bg);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--r-md);
  white-space: nowrap;
  align-self: flex-end;
  transition: opacity var(--t);
}
.t-btn-check:hover { opacity: 0.82; }


/* ── 7. RESULT DISPLAY ── */
.t-results {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}
.t-results__label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
}
.t-results__domain {
  color: var(--text-2);
  font-weight: 500;
  font-size: 0.88rem;
}
.t-result-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.t-result-empty {
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-3);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}
.t-result-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem 1.25rem;
  align-items: start;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.t-result-row:last-child { border-bottom: none; }

.t-result-key {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
  font-family: var(--font-mono);
  white-space: nowrap;
  padding-top: 0.1rem;
}
.t-result-val {
  font-family: var(--font-mono);
  font-size: 0.83rem;
  color: var(--text);
  word-break: break-all;
  cursor: pointer;
}
.t-result-val:active { opacity: 0.5; }
.t-result-badge { align-self: center; }

/* Priority badge (MX) */
.t-pri {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 22px;
  padding: 0 7px;
  border-radius: var(--r-xs);
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--font-mono);
  background: var(--bg-2);
  color: var(--text-2);
  border: 1px solid var(--border);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  white-space: nowrap;
}
.badge::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
}
.badge-ok    { color: var(--c-ok);    background: rgba(22,163,74,0.08);  border: 1px solid rgba(22,163,74,0.2);  }
.badge-ok::before    { background: var(--c-ok);    }
.badge-warn  { color: var(--c-warn);  background: rgba(217,119,6,0.08);  border: 1px solid rgba(217,119,6,0.2);  }
.badge-warn::before  { background: var(--c-warn);  }
.badge-error { color: var(--c-error); background: rgba(220,38,38,0.08);  border: 1px solid rgba(220,38,38,0.18); }
.badge-error::before { background: var(--c-error); }
.badge-info  { color: var(--c-info);  background: rgba(79,70,229,0.08);  border: 1px solid rgba(79,70,229,0.2);  }
.badge-info::before  { background: var(--c-info);  }

/* Interpretation strip below result box */
.t-interp {
  padding: 0.9rem 1.25rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  font-size: 0.83rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* Alert */
.t-alert {
  padding: 0.875rem 1.1rem;
  border-radius: var(--r-md);
  font-size: 0.875rem;
  line-height: 1.55;
  margin-bottom: 1rem;
}
.t-alert-error { background: rgba(220,38,38,0.07);  border: 1px solid rgba(220,38,38,0.18); }
.t-alert-warn  { background: rgba(217,119,6,0.07);  border: 1px solid rgba(217,119,6,0.18);  }


/* ── 8. SEO CONTENT ── */
.t-content {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}
.t-content:last-of-type { border-bottom: none; }

.t-content .sec-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  font-family: var(--font-mono);
  margin-bottom: 0.5rem;
}
.t-content h2 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 0.85rem;
  line-height: 1.3;
}
.t-content h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.4rem 0 0.4rem;
}
.t-content p {
  font-size: 0.9rem;
  color: var(--text-2);
  max-width: 720px;
  line-height: 1.75;
  margin-bottom: 0.5rem;
}
.t-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-width: 680px;
  margin-top: 0.5rem;
}
.t-content ul li {
  font-size: 0.88rem;
  color: var(--text-2);
  padding-left: 1.1rem;
  position: relative;
  line-height: 1.65;
}
.t-content ul li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--text-3);
}

/* FAQ grid */
.t-faq {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.875rem;
  margin-top: 1rem;
}
.t-faq__item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1rem 1.1rem;
}
.t-faq__item h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
  line-height: 1.4;
}
.t-faq__item p {
  font-size: 0.82rem;
  color: var(--text-2);
  max-width: none;
  margin: 0;
  line-height: 1.6;
}

/* Related tool links */
.t-related {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}
.t-related a {
  font-size: 0.78rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--text-2);
  padding: 0.28rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: color var(--t), border-color var(--t);
}
.t-related a:hover { color: var(--text); border-color: var(--border-2); }


/* ── 9. CTA BOX ── */
.t-cta-section { padding: 3rem 0; }
.t-cta-box {
  background: var(--text);
  border-radius: var(--r-xl);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.t-cta-box h2 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--bg);
  margin-bottom: 0.4rem;
}
.t-cta-box p {
  font-size: 0.875rem;
  color: var(--bg);
  opacity: 0.6;
  max-width: 420px;
  line-height: 1.65;
}
.t-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.7rem 1.6rem;
  background: var(--bg);
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--r-md);
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity var(--t);
}
.t-cta-btn:hover { opacity: 0.85; }


/* ── 10. HOMEPAGE ── */
.t-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.t-tool-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  transition: border-color var(--t), box-shadow var(--t);
  text-decoration: none;
  color: inherit;
}
.t-tool-card:hover {
  border-color: var(--border-2);
  box-shadow: var(--sh);
}
.t-tool-card__icon {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  background: var(--bg-2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-2);
  margin-bottom: 0.25rem;
}
.t-tool-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.t-tool-card p {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.6;
  flex: 1;
}
.t-tool-card__arrow {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-3);
  margin-top: 0.25rem;
  transition: color var(--t);
}
.t-tool-card:hover .t-tool-card__arrow { color: var(--text-2); }

/* Services row */
.t-services-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
.t-service-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.15rem 1.25rem;
}
.t-service-item h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}
.t-service-item p {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.6;
}


/* ── 11. FOOTER ── */
.t-footer {
  background: var(--d-bg);
  color: var(--d-text);
  padding: 2.5rem 0 1.5rem;
  margin-top: auto;
}
.t-footer__top {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 3.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--d-border);
  margin-bottom: 1.25rem;
}
.t-footer__brand span.t-footer__name {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--d-text);
  margin-bottom: 0.35rem;
}
.t-footer__brand p {
  font-size: 0.8rem;
  color: var(--d-text-2);
  max-width: 240px;
  line-height: 1.6;
}
.t-footer__col { }
.t-footer__label {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--d-text-3);
  font-family: var(--font-mono);
  margin-bottom: 0.65rem;
}
.t-footer__col ul { display: flex; flex-direction: column; gap: 0.3rem; }
.t-footer__col a {
  font-size: 0.82rem;
  color: var(--d-text-2);
  transition: color var(--t);
}
.t-footer__col a:hover { color: var(--d-text); }
.t-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--d-text-3);
}
.t-footer__bottom a {
  color: var(--d-text-3);
  transition: color var(--t);
}
.t-footer__bottom a:hover { color: var(--d-text-2); }


/* ── 12. UTILITIES ── */
.mono { font-family: var(--font-mono); }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }


/* ── 13. RESPONSIVE ── */
@media (max-width: 900px) {
  .t-nav__links { display: none; }
  .t-nav__back  { display: none; }
  .t-nav__burger { display: flex; }
}
@media (max-width: 720px) {
  .container { padding: 0 1.25rem; }
  .t-tools-grid { grid-template-columns: 1fr 1fr; }
  .t-services-row { grid-template-columns: 1fr; }
  .t-faq { grid-template-columns: 1fr; }
  .t-cta-box { flex-direction: column; align-items: flex-start; padding: 1.75rem; }
}
@media (max-width: 520px) {
  .t-tools-grid { grid-template-columns: 1fr; }
  .t-form { flex-direction: column; }
  .t-form__group { max-width: none; }
  .t-page-header { padding: 2rem 0 1.5rem; }
  .t-result-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .t-result-badge { justify-self: start; }
}