/* Toolful v5 · Quiet Precision · global foundation */

/* 1. Reset and document */
*, *::before, *::after { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--c-text-1);
  background: var(--c-bg);
  font: 400 var(--fs-base) / var(--lh-base) var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body::before {
  position: fixed;
  inset: 0 0 auto;
  z-index: -1;
  height: 520px;
  content: "";
  pointer-events: none;
  background:
    radial-gradient(circle at 50% -20%, color-mix(in srgb, var(--c-primary) 8%, transparent), transparent 58%);
}
img, svg, canvas, video { display: block; max-width: 100%; }
button, input, select, textarea { color: inherit; font: inherit; }
button, select { cursor: pointer; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: none; }
h1, h2, h3, h4, p, ul, ol, pre { margin: 0; }
h1, h2, h3, h4 {
  color: var(--c-heading);
  font-weight: 680;
  line-height: var(--lh-tight);
  letter-spacing: var(--track-mid);
}
ul, ol { padding: 0; }
::selection { color: var(--c-heading); background: var(--c-primary-soft); }
::placeholder { color: var(--c-placeholder); opacity: 1; }

:focus { outline: none; }
:focus-visible {
  outline: 3px solid var(--c-focus-ring-soft);
  outline-offset: 3px;
}
.hidden { display: none !important; }
.tf-sprite { pointer-events: none; }
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--c-on-primary);
  background: var(--c-btn-fill);
  border-radius: var(--r-sm);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

/* 2. Layout */
.container, .container-tool, .container-narrow {
  width: min(100%, var(--container));
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container-tool { width: min(100%, var(--container-tool)); }
.container-narrow { width: min(100%, var(--container-narrow)); }
.site-body, .site-main { min-width: 0; width: 100%; }
.site-body { display: block; }
.side-dir { display: none !important; }
main { min-height: 60vh; padding-bottom: var(--rhythm-1); }
main > .container,
main > .container-tool,
main > .container-narrow,
main > section.container,
main > section.container-tool,
main > section.container-narrow { margin-top: var(--rhythm-2); }

/* 3. Header and tool switcher */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  height: var(--header-h);
  border-bottom: 1px solid color-mix(in srgb, var(--c-border) 72%, transparent);
  background: color-mix(in srgb, var(--c-bg) 86%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
}
.header-left { display: flex; align-items: center; min-width: 0; }
.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  min-height: 44px;
  color: var(--c-heading);
  font-weight: 700;
  letter-spacing: -.02em;
}
.brand:hover { color: var(--c-heading); }
.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
}
.brand-mark img { width: 32px; height: 32px; object-fit: contain; }
.brand-text { white-space: nowrap; }
.nav { display: flex; justify-content: center; }
.nav-toggle { display: none; }
.dir-wrap, .theme-control, .lang-control { position: relative; }
.dir-trigger,
.lang-btn,
.icon-btn,
.theme-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 14px;
  color: var(--c-text-2);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r);
}
.dir-trigger { gap: 8px; color: var(--c-text-1); font-weight: 600; }
.dir-trigger svg { width: 16px; height: 16px; transition: transform var(--dur-1) var(--ease); }
.dir-wrap.open .dir-trigger svg { transform: rotate(180deg); }
.dir-trigger:hover,
.lang-btn:hover,
.icon-btn:hover,
.theme-btn:hover { color: var(--c-heading); background: var(--c-hover-subtle); }
.dir-menu,
.theme-menu,
.lang-menu {
  position: absolute;
  top: calc(100% + 10px);
  z-index: 90;
  padding: 12px;
  color: var(--c-text-1);
  background: var(--c-surface-elevated);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-3);
}
.dir-menu {
  left: 50%;
  width: min(760px, calc(100vw - 32px));
  visibility: hidden;
  opacity: 0;
  transform: translate(-50%, -8px);
  transition: opacity var(--dur-1) var(--ease), transform var(--dur-1) var(--ease), visibility var(--dur-1);
}
.dir-wrap.open .dir-menu {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, 0);
}
.dir-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.dir-group { padding: 10px; }
.dir-group h4 {
  margin: 0 0 8px 10px;
  color: var(--c-text-3);
  font-size: var(--fs-xs);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
}
.dir-group a {
  display: flex;
  gap: 10px;
  align-items: center;
  min-height: 44px;
  padding: 0 10px;
  color: var(--c-text-1);
  font-size: var(--fs-sm);
  border-radius: var(--r-sm);
}
.dir-group a:hover { background: var(--c-hover-subtle); }
.dir-num { color: var(--c-text-3); font: 500 var(--fs-xs) var(--font-mono); }
.header-actions { display: flex; gap: 2px; justify-content: flex-end; }
.lang-btn { padding-inline: 12px; font-weight: 650; }
.theme-btn svg { width: 20px; height: 20px; }
.theme-btn .ti-light, .theme-btn .ti-dark { display: none; }
html[data-theme-resolved="light"] .theme-btn .ti-system,
html[data-theme-resolved="dark"] .theme-btn .ti-system { display: none; }
html[data-theme-resolved="light"] .theme-btn .ti-light,
html[data-theme-resolved="dark"] .theme-btn .ti-dark { display: block; }
.theme-menu, .lang-menu { right: 0; width: 190px; }
.lang-menu { width: 150px; }
.theme-menu-title {
  padding: 6px 10px 10px;
  color: var(--c-text-3);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--track-wide);
}
.theme-opt, .lang-opt {
  display: flex;
  gap: 10px;
  align-items: center;
  width: 100%;
  min-height: 44px;
  padding: 0 10px;
  color: var(--c-text-1);
  text-align: left;
  background: transparent;
  border: 0;
  border-radius: var(--r-sm);
}
.theme-opt:hover, .lang-opt:hover { background: var(--c-hover-subtle); }
.theme-opt svg { width: 18px; height: 18px; }
.theme-opt .tick { margin-left: auto; visibility: hidden; }
.theme-opt[aria-checked="true"] .tick { visibility: visible; color: var(--c-primary); }

/* 4. Breadcrumb and page introduction */
.breadcrumb {
  display: flex;
  gap: 7px;
  align-items: center;
  min-height: 44px;
  padding-top: 16px;
  overflow-x: auto;
  color: var(--c-text-3);
  font-size: var(--fs-sm);
  white-space: nowrap;
  scrollbar-width: none;
}
.breadcrumb::-webkit-scrollbar { display: none; }
.breadcrumb ol, .breadcrumb ul, .breadcrumb li { display: flex; gap: 7px; align-items: center; list-style: none; }
.breadcrumb a { display: inline-flex; align-items: center; min-height: 44px; color: var(--c-text-3); }
.breadcrumb a:hover { color: var(--c-text-1); }
.hero-tool,
.hero-compact {
  width: min(100%, var(--container-tool));
  margin-inline: auto;
  padding: 64px var(--gutter) 42px;
  text-align: left;
}
.hero-tool .eyebrow,
.hero-compact .eyebrow {
  margin-bottom: 14px;
  color: var(--c-text-3);
  font: 600 var(--fs-xs) var(--font-mono);
  letter-spacing: .16em;
  text-transform: uppercase;
}
.hero-tool h1, .hero-compact h1 {
  max-width: 880px;
  font-size: var(--fs-hero-tool);
  font-weight: 720;
}
.hero-sub {
  max-width: 720px;
  margin-top: 14px;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  line-height: 1.62;
}
.hero-sub b, .hero-sub strong { color: var(--c-text-1); font-weight: 650; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.eyebrow, .hint {
  color: var(--c-text-3);
  font: 600 var(--fs-xs) var(--font-mono);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
}
.section-head { display: flex; gap: 18px; align-items: center; justify-content: space-between; }
.section-title { color: var(--c-heading); font-size: var(--fs-xl); }

/* 5. Surfaces and controls */
.card, .card-focus, .workbench, .form-card, .login-card {
  color: var(--c-text-1);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
}
.card { padding: 24px; }
.card-focus, .workbench { padding: 32px; box-shadow: var(--shadow-2); }
.card-interactive { transition: transform var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease), box-shadow var(--dur-1) var(--ease); }
.card-interactive:hover { border-color: var(--c-border-strong); transform: translateY(-2px); box-shadow: var(--shadow-1); }
.btn {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 17px;
  font-weight: 650;
  line-height: 1;
  white-space: nowrap;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r);
  transition: color var(--dur-1) var(--ease), background var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease), transform var(--dur-1) var(--ease);
}
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn:active:not(:disabled) { transform: translateY(0); }
.btn:disabled { cursor: not-allowed; opacity: .48; }
.btn svg { width: 18px; height: 18px; }
.btn-primary {
  color: var(--c-on-primary);
  background: var(--c-btn-fill);
  border-color: var(--c-btn-fill);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--c-primary) 18%, transparent);
}
.btn-primary:hover:not(:disabled) { background: var(--c-btn-fill-hover); border-color: var(--c-btn-fill-hover); }
.btn-primary:active:not(:disabled) { background: var(--c-btn-fill-active); }
.btn-secondary {
  color: var(--c-text-1);
  background: var(--c-surface);
  border-color: var(--c-border-strong);
}
.btn-secondary:hover:not(:disabled) { background: var(--c-hover-subtle); border-color: var(--c-text-3); }
.btn-ghost { color: var(--c-primary); }
.btn-ghost:hover:not(:disabled) { background: var(--c-primary-soft); }
.input, .textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 13px;
  color: var(--c-text-1);
  background: var(--c-surface);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--r);
  transition: border-color var(--dur-1) var(--ease), box-shadow var(--dur-1) var(--ease);
}
.textarea { min-height: 180px; resize: vertical; line-height: 1.6; }
.input:hover, .textarea:hover { border-color: var(--c-text-3); }
.input:focus, .textarea:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px var(--c-focus-ring-soft);
}
.field, .form-field { display: grid; gap: 8px; }
.form-label, .field > label { color: var(--c-text-1); font-size: var(--fs-sm); font-weight: 650; }
.form-optional { color: var(--c-text-3); font-weight: 400; }
.form-required { color: var(--c-danger); }
.form-actions, .actions, .result-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  color: var(--c-text-2);
  font-size: var(--fs-xs);
  background: var(--c-surface-subtle);
  border: 1px solid var(--c-border);
  border-radius: var(--r-full);
}
.badge-warning { color: var(--c-warning); background: var(--c-warning-soft); border-color: color-mix(in srgb, var(--c-warning) 26%, transparent); }

/* 6. Lists, steps and results */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.step {
  display: flex;
  gap: 16px;
  min-width: 0;
  padding: 20px;
  background: color-mix(in srgb, var(--c-surface) 78%, transparent);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
}
.step-num {
  display: grid;
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  place-items: center;
  color: var(--c-primary);
  font: 650 var(--fs-xs) var(--font-mono);
  background: var(--c-primary-soft);
  border-radius: var(--r-full);
}
.step h3 { margin: 4px 0 6px; font-size: var(--fs-base); }
.step p { color: var(--c-text-2); font-size: var(--fs-sm); line-height: 1.55; }
.features { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.feature { display: flex; gap: 14px; min-width: 0; }
.feature h3 { margin: 2px 0 5px; font-size: var(--fs-base); }
.feature p { color: var(--c-text-2); font-size: var(--fs-sm); line-height: 1.55; }
.tool-icon, .feature .tool-icon {
  display: grid;
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--c-primary);
  background: var(--c-primary-soft);
  border-radius: var(--r);
}
.tool-icon svg { width: 20px; height: 20px; }
.result {
  padding: 18px;
  background: var(--c-surface-subtle);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
}
.result-head { display: flex; gap: 12px; align-items: center; justify-content: space-between; }
.result-body { margin-top: 12px; }
.status-row, .err-msg, .fallback-notice {
  min-height: 44px;
  margin-top: 14px;
  padding: 11px 13px;
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  line-height: 1.5;
  background: var(--c-surface-subtle);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
}
.status-row:empty { display: none; }
.status-ok { color: var(--c-success); background: var(--c-success-soft); border-color: color-mix(in srgb, var(--c-success) 26%, transparent); }
.status-err, .err-msg { color: var(--c-danger); background: var(--c-danger-soft); border-color: color-mix(in srgb, var(--c-danger) 28%, transparent); }
.status-info { color: var(--c-primary); background: var(--c-primary-soft); border-color: var(--c-accent-border); }
.fallback-notice { color: var(--c-warning); background: var(--c-warning-soft); border-color: color-mix(in srgb, var(--c-warning) 28%, transparent); }
.note-row { display: flex; gap: 9px; align-items: flex-start; margin-top: 12px; color: var(--c-text-2); font-size: var(--fs-sm); }
.note-row svg { flex: 0 0 18px; width: 18px; height: 18px; margin-top: 2px; color: var(--c-primary); }
.list { display: grid; gap: 10px; list-style: none; }
.list-item {
  display: flex;
  gap: 16px;
  align-items: center;
  min-height: 64px;
  padding: 12px 14px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
}
.li-actions { display: flex; gap: 8px; margin-left: auto; }

/* 7. Shared tool directory */
.tool-list { overflow: hidden; }
.tool-row {
  display: grid;
  grid-template-columns: 42px 44px minmax(0, 1fr) 32px;
  gap: 16px;
  align-items: center;
  min-height: 82px;
  padding: 12px 16px;
  color: var(--c-text-1);
  border-top: 1px solid var(--c-divider);
  transition: background var(--dur-1) var(--ease);
}
.tool-row:last-child { border-bottom: 1px solid var(--c-divider); }
.tool-row:hover { background: var(--c-hover-subtle); }
.tl-num { color: var(--c-text-3); font: 550 var(--fs-xs) var(--font-mono); letter-spacing: .12em; }
.tl-icon {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--c-primary);
  background: var(--c-primary-soft);
  border-radius: var(--r);
}
.tl-icon svg { width: 20px; height: 20px; }
.tl-body { display: grid; min-width: 0; }
.tl-name { color: var(--c-heading); font-weight: 650; }
.tl-desc { overflow: hidden; color: var(--c-text-2); font-size: var(--fs-sm); text-overflow: ellipsis; white-space: nowrap; }
.tl-go { color: var(--c-text-3); font-size: 20px; transition: transform var(--dur-1) var(--ease); }
.tool-row:hover .tl-go { transform: translateX(3px); }

/* 8. FAQ and editorial content */
.faq { border-top: 1px solid var(--c-divider); }
.faq details { border-bottom: 1px solid var(--c-divider); }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  color: var(--c-heading);
  font-weight: 650;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--c-text-3); font-size: 22px; font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details > p { max-width: 680px; padding: 0 0 20px; color: var(--c-text-2); font-size: var(--fs-sm); }
.faq details p a, .donate-line a { display: inline-flex; align-items: center; min-height: 44px; }
.article { color: var(--c-text-2); }
.article h2 { margin-bottom: 24px; font-size: var(--fs-2xl); }
.article h3 { margin: 30px 0 12px; font-size: var(--fs-lg); }
.article p { margin-top: 16px; }
.article b, .article strong { color: var(--c-text-1); }
.article-kicker { margin-bottom: 10px !important; color: var(--c-text-3); font: 600 var(--fs-xs) var(--font-mono); letter-spacing: var(--track-wide); text-transform: uppercase; }
.donate-line { margin-top: 20px; color: var(--c-text-3); font-size: var(--fs-sm); }

/* 9. Footer and modal */
.site-footer {
  padding: 64px 0 24px;
  color: var(--c-text-2);
  background: var(--c-surface-subtle);
  border-top: 1px solid var(--c-border);
}
.footer-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 32px; }
.footer-col { display: grid; align-content: start; gap: 4px; }
.footer-col h4 { margin-bottom: 10px; color: var(--c-text-3); font-size: var(--fs-xs); letter-spacing: var(--track-wide); text-transform: uppercase; }
.site-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  width: fit-content;
  color: var(--c-text-2);
  font-size: var(--fs-sm);
}
.site-footer a:hover { color: var(--c-heading); }
.footer-bottom {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  margin-top: 44px;
  padding-top: 22px;
  color: var(--c-text-3);
  font-size: var(--fs-xs);
  border-top: 1px solid var(--c-border);
}
.footer-legal { display: flex; gap: 20px; }
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  padding: 20px;
  place-items: center;
  background: var(--c-overlay);
}
.modal-card {
  width: min(100%, 520px);
  padding: 28px;
  background: var(--c-surface-elevated);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-3);
}
.modal-sub { margin-top: 8px; color: var(--c-text-2); }
.donate-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 22px; }
.donate-item { padding: 14px; text-align: center; background: var(--c-surface-subtle); border-radius: var(--r); }
.donate-item img { width: 100%; margin-inline: auto; border-radius: var(--r-sm); }
.donate-item p { margin-top: 8px; color: var(--c-text-2); font-size: var(--fs-sm); }
.modal-close { width: 100%; margin-top: 20px; }

/* 10. Responsive */
@media (max-width: 1023px) {
  .header-inner { grid-template-columns: 1fr auto; }
  .nav { position: static; }
  .nav-toggle { display: none; }
  .dir-trigger span { display: none; }
  .dir-trigger svg { width: 20px; height: 20px; }
  .dir-trigger svg path { d: path("M4 7h16M4 12h16M4 17h16"); }
  .dir-menu { left: auto; right: -92px; transform: translateY(-8px); }
  .dir-wrap.open .dir-menu { transform: translateY(0); }
  .header-actions { grid-column: 2; grid-row: 1; }
  .nav { grid-column: 2; grid-row: 1; margin-right: 92px; }
  .dir-grid { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 767px) {
  body::before { height: 380px; }
  main { padding-bottom: 64px; }
  .header-inner { padding-inline: 14px; }
  .brand-text { font-size: 15px; }
  .brand-mark, .brand-mark img { width: 28px; height: 28px; }
  .nav { margin-right: 88px; }
  .dir-menu { position: fixed; top: calc(var(--header-h) + 8px); right: 12px; left: 12px; width: auto; max-height: calc(100vh - var(--header-h) - 28px); overflow: auto; }
  .dir-grid { grid-template-columns: 1fr 1fr; }
  .dir-group { padding: 6px; }
  .hero-tool, .hero-compact { padding: 42px var(--gutter) 30px; }
  .hero-sub { font-size: var(--fs-base); }
  .card { padding: 18px; }
  .card-focus, .workbench { padding: 20px; border-radius: var(--r); }
  .grid-2, .steps, .features { grid-template-columns: 1fr; }
  .tool-row { grid-template-columns: 34px 40px minmax(0, 1fr) 20px; gap: 10px; min-height: 76px; padding-inline: 4px; }
  .tl-icon { width: 38px; height: 38px; }
  .tl-desc { white-space: normal; line-height: 1.4; }
  .section-head { align-items: flex-end; }
  .section-title { font-size: var(--fs-lg); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 18px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
  .footer-legal { gap: 16px; }
}

@media (max-width: 480px) {
  .dir-grid, .donate-grid { grid-template-columns: 1fr; }
  .brand { gap: 8px; }
  .header-actions { gap: 0; }
  .lang-btn, .icon-btn, .theme-btn, .dir-trigger { padding-inline: 9px; }
  .nav { margin-right: 82px; }
  .btn { padding-inline: 14px; }
  .form-actions .btn, .actions .btn, .result-actions .btn { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}