/* ============================================================
   CURIOUS ASSISTANT — DESIGN SYSTEM
   Concept: a working index / catalog of tools.
   Every tool has a category code (STU, DEV, FIN...) the way a
   library catalog or hardware catalog assigns a shelf code —
   that code is used for real navigation, not decoration.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,500;8..60,600;8..60,700&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  /* --- color: paper + ink, teal as the working accent, amber as the flag --- */
  --paper:      #F1F0EA;
  --paper-raised:#FBFAF6;
  --ink:        #1C2321;
  --ink-soft:   #4C544F;
  --ink-faint:  #848C86;
  --line:       #D8D5C8;
  --line-strong:#B9B6A6;
  --accent:     #14966F;   /* workshop teal, brightened — links, focus, primary actions */
  --accent-ink: #0C6B4E;
  --flag:       #E08A1E;   /* amber flag, brightened — highlights, counters */
  --white:      #FFFFFF;

  /* category codes: functional color-coding, used as small chips/rules only */
  --cat-student:  #14966F;
  --cat-developer:#2E72B8;
  --cat-finance:  #D6821C;
  --cat-health:   #DB4B4B;
  --cat-utility:  #7C8F3E;
  --cat-design:   #A24DC2;
  --cat-email:    #0F8FA5;
  --cat-seo:      #CC4F8B;

  /* type */
  --font-head: "Source Serif 4", Georgia, serif;
  --font-body: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --font-code: "IBM Plex Mono", ui-monospace, monospace;

  /* scale */
  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.4vw, 1.35rem);
  --step-2:  clamp(1.5rem, 1.3rem + 0.8vw, 1.9rem);
  --step-3:  clamp(2rem, 1.6rem + 1.6vw, 2.9rem);
  --step-4:  clamp(2.6rem, 2rem + 2.6vw, 4rem);

  --maxw: 1180px;
  --radius-sm: 7px;
  --radius: 12px;
  --radius-lg: 18px;

  /* depth */
  --shadow-sm: 0 1px 2px rgba(28,35,33,0.05), 0 1px 3px rgba(28,35,33,0.06);
  --shadow-md: 0 3px 8px rgba(28,35,33,0.06), 0 8px 20px rgba(28,35,33,0.08);
  --shadow-lg: 0 10px 24px rgba(28,35,33,0.10), 0 4px 10px rgba(28,35,33,0.06);
}

@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:      #171A17;
    --paper-raised:#1E211D;
    --ink:        #EDEBE3;
    --ink-soft:   #B8BDB4;
    --ink-faint:  #7C837B;
    --line:       #33362F;
    --line-strong:#464a40;
    --accent:     #34D6A4;
    --accent-ink: #DCF3E9;
    --flag:       #F0A83E;
    --white:      #202420;
  }
}
:root[data-theme="dark"]{
  --paper:      #171A17;
  --paper-raised:#1E211D;
  --ink:        #EDEBE3;
  --ink-soft:   #B8BDB4;
  --ink-faint:  #7C837B;
  --line:       #33362F;
  --line-strong:#464a40;
  --accent:     #34D6A4;
  --accent-ink: #DCF3E9;
  --flag:       #F0A83E;
  --white:      #202420;
}

/* --- reset / base --- */
*,*::before,*::after{ box-sizing:border-box; }
html{
  scroll-behavior:smooth;
  scroll-padding-top: calc(72px + env(safe-area-inset-top,0px));
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; }
}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:var(--step-0);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  padding-top: env(safe-area-inset-top,0px);
  padding-bottom: env(safe-area-inset-bottom,0px);
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:600;
  line-height:1.15;
  margin:0 0 0.5em;
  letter-spacing:-0.01em;
}
p{ margin:0 0 1em; color:var(--ink-soft); max-width:62ch; }
.wrap{ max-width:var(--maxw); margin-inline:auto; padding-inline:clamp(1.1rem, 3vw, 2.5rem); }
:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; }
.visually-hidden{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap; border:0; padding:0; margin:-1px;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:sticky; top:0; z-index:40;
  background:color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter:blur(10px);
  box-shadow:0 1px 0 var(--line), var(--shadow-sm);
  padding-top: env(safe-area-inset-top,0px);
}
.site-header .wrap{
  height:68px;
  display:flex; align-items:center; gap:clamp(1rem,3vw,2.2rem);
}
.brand{
  display:flex; align-items:baseline; gap:0.5rem;
  text-decoration:none; flex-shrink:0;
}
.brand-mark{
  font-family:var(--font-code); font-weight:600; font-size:0.72rem;
  border:1px solid var(--ink); color:var(--ink); border-radius:var(--radius-sm);
  padding:0.2em 0.4em; letter-spacing:0.02em;
}
.brand-name{
  font-family:var(--font-head); font-weight:600; font-size:1.15rem; color:var(--ink);
}
.primary-nav{ display:flex; gap:clamp(1rem,2.4vw,1.9rem); flex:1; }
.primary-nav a{
  text-decoration:none; font-size:0.95rem; color:var(--ink-soft);
  padding:0.35em 0; border-bottom:2px solid transparent;
}
.primary-nav a:hover, .primary-nav a[aria-current="page"]{
  color:var(--ink); border-bottom-color:var(--accent);
}
.header-tools{ display:flex; align-items:center; gap:0.7rem; margin-left:auto; }
.site-search{
  display:flex; align-items:center; gap:0.4rem;
  border:1px solid var(--line-strong); border-radius:999px;
  padding:0.5em 0.9em; background:var(--paper-raised);
  width:220px;
}
.site-search input{
  border:0; background:transparent; outline:0; width:100%;
  font-family:var(--font-body); font-size:0.88rem; color:var(--ink);
}
.site-search input::placeholder{ color:var(--ink-faint); }
.site-search svg{ flex-shrink:0; color:var(--ink-faint); width:15px; height:15px; }
.nav-toggle{
  display:none; background:none; border:1px solid var(--line-strong);
  border-radius:var(--radius); width:38px; height:38px;
  align-items:center; justify-content:center; cursor:pointer; color:var(--ink);
}
@media (max-width: 860px){
  .site-search{ display:none; }
}
@media (max-width: 760px){
  .primary-nav{
    position:fixed; inset:68px 0 auto 0; z-index:39;
    background:var(--paper); border-bottom:1px solid var(--line);
    flex-direction:column; gap:0; padding:0.5rem clamp(1.1rem,3vw,2.5rem) 1rem;
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:opacity .18s ease, transform .18s ease;
  }
  .primary-nav[data-open="true"]{
    opacity:1; transform:translateY(0); pointer-events:auto;
  }
  .primary-nav a{ padding:0.75em 0; border-bottom:1px solid var(--line); width:100%; }
  .nav-toggle{ display:inline-flex; }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn{
  display:inline-flex; align-items:center; gap:0.5em;
  font-family:var(--font-body); font-weight:600; font-size:0.95rem;
  padding:0.75em 1.4em; border-radius:999px;
  text-decoration:none; border:1px solid transparent; cursor:pointer;
  box-shadow:var(--shadow-sm);
  transition:transform .14s ease, box-shadow .14s ease, background .14s ease, border-color .14s ease;
}
.btn:hover{ transform:translateY(-1px); box-shadow:var(--shadow-md); }
.btn:active{ transform:translateY(0); box-shadow:var(--shadow-sm); }
.btn-primary{ background:var(--ink); color:var(--paper); }
.btn-primary:hover{ background:var(--accent-ink); }
.btn-ghost{ border-color:var(--line-strong); color:var(--ink); background:var(--paper-raised); }
.btn-ghost:hover{ border-color:var(--accent); color:var(--accent); }

/* ============================================================
   HERO
   ============================================================ */
.hero{ padding-block: clamp(2.5rem, 6vw, 5rem) clamp(2.5rem, 5vw, 4rem); }
.hero .wrap{
  display:grid; grid-template-columns: 1.55fr 1fr; gap:clamp(2rem,5vw,4rem);
  align-items:end;
}
.hero h1{ font-size:var(--step-4); max-width:14ch; }
.hero-lede{ font-size:var(--step-1); max-width:46ch; }
.hero-actions{ display:flex; gap:0.9rem; flex-wrap:wrap; margin-top:1.4rem; }
.ledger{
  border:1px solid var(--line); border-radius:var(--radius-lg); background:var(--paper-raised);
  padding:1.4rem 1.5rem; box-shadow:var(--shadow-md);
}
.ledger-title{
  font-family:var(--font-code); font-size:0.72rem; letter-spacing:0.03em;
  color:var(--ink-faint); border-bottom:1px solid var(--line); padding-bottom:0.6rem; margin-bottom:0.7rem;
}
.ledger-row{
  display:flex; justify-content:space-between; align-items:baseline;
  padding:0.5rem 0; border-bottom:1px dashed var(--line);
  font-size:0.92rem; color:var(--ink-soft);
}
.ledger-row:last-child{ border-bottom:0; }
.ledger-row strong{
  font-family:var(--font-code); font-size:1.15rem; color:var(--accent); font-weight:600;
}
@media (max-width: 820px){
  .hero .wrap{ grid-template-columns:1fr; align-items:start; }
}

/* ============================================================
   CATEGORY INDEX (catalog rows, not uniform cards)
   ============================================================ */
.section{ padding-block: clamp(2.4rem,5vw,4rem); border-bottom:1px solid var(--line); }
.section-head{ display:flex; justify-content:space-between; align-items:end; gap:1.5rem; margin-bottom:1.6rem; flex-wrap:wrap; }
.section-head h2{ font-size:var(--step-3); margin-bottom:0.2em; }
.section-head p{ margin:0; }

.cat-list{ display:flex; flex-direction:column; gap:0.7rem; }
.cat-row{
  display:grid; grid-template-columns: 64px 1fr 1fr auto; gap:1.4rem;
  align-items:center; padding:1.15rem 1.3rem;
  text-decoration:none; color:inherit;
  border:1px solid var(--line); border-radius:var(--radius);
  background:var(--paper-raised);
  transition:border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.cat-row:hover{ border-color:var(--cat-color, var(--accent)); box-shadow:var(--shadow-md); transform:translateY(-2px); }
.cat-code{
  font-family:var(--font-code); font-weight:600; font-size:0.85rem;
  color:var(--cat-color, var(--accent));
  border:1px solid var(--cat-color, var(--accent)); border-radius:var(--radius-sm);
  padding:0.35em 0; text-align:center;
}
.cat-name{ font-family:var(--font-head); font-size:1.15rem; font-weight:600; }
.cat-desc{ color:var(--ink-soft); font-size:0.92rem; margin:0; }
.cat-count{ font-family:var(--font-code); font-size:0.82rem; color:var(--ink-faint); white-space:nowrap; }
@media (max-width:700px){
  .cat-row{ grid-template-columns: 48px 1fr; row-gap:0.3rem; }
  .cat-desc, .cat-count{ grid-column: 2; }
}

/* ============================================================
   TOOL GRID (flat, bordered — no shadows, no uniform radius kit)
   ============================================================ */
.tool-controls{ display:flex; gap:0.7rem; flex-wrap:wrap; margin-bottom:1.4rem; }
.chip{
  font-family:var(--font-code); font-size:0.8rem; padding:0.4em 0.9em;
  border:1px solid var(--line-strong); border-radius:999px; background:var(--paper-raised);
  color:var(--ink-soft); cursor:pointer; box-shadow:var(--shadow-sm);
  transition:box-shadow .14s ease, transform .14s ease;
}
.chip:hover{ box-shadow:var(--shadow-md); transform:translateY(-1px); }
.chip[aria-pressed="true"]{ background:var(--ink); color:var(--paper); border-color:var(--ink); }

.tool-grid{
  display:grid; grid-template-columns:repeat(auto-fill, minmax(230px,1fr)); gap:1rem;
}
.tool-card{
  background:var(--paper-raised); padding:1.2rem 1.3rem; text-decoration:none; color:inherit;
  display:flex; flex-direction:column; gap:0.5rem; min-height:132px;
  border:1px solid var(--line); border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  transition:box-shadow .15s ease, transform .15s ease, border-color .15s ease;
}
.tool-card:hover{ box-shadow:var(--shadow-md); transform:translateY(-2px); border-color:var(--cat-color, var(--accent)); }
.tool-card .tag{
  font-family:var(--font-code); font-size:0.7rem; color:var(--cat-color, var(--accent));
  letter-spacing:0.02em;
}
.tool-card h3{ font-family:var(--font-body); font-size:1rem; font-weight:600; margin:0; }
.tool-card .use{ font-size:0.85rem; color:var(--ink-soft); margin:0; }

/* ============================================================
   PRINCIPLES
   ============================================================ */
.principles{ display:grid; grid-template-columns:repeat(4,1fr); gap:1.4rem; }
.principle{
  border-top:3px solid var(--accent); padding:1rem 1.1rem 1.1rem;
  background:var(--paper-raised); border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
}
.principle h3{ font-size:1.05rem; font-family:var(--font-body); font-weight:600; }
.principle p{ font-size:0.92rem; }
@media (max-width:900px){ .principles{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:560px){ .principles{ grid-template-columns:1fr; } }

/* ============================================================
   CTA BAND
   ============================================================ */
.cta-band{
  background:var(--ink); color:var(--paper); padding-block:clamp(2.4rem,5vw,3.6rem);
  border-radius:var(--radius-lg); margin-block:clamp(2rem,4vw,3rem);
  max-width:calc(var(--maxw) - clamp(2.2rem,6vw,5rem)); margin-inline:auto;
}
.cta-band .wrap{ display:flex; justify-content:space-between; align-items:center; gap:2rem; flex-wrap:wrap; max-width:none; padding-inline:clamp(1.6rem,4vw,3rem); }
.cta-band h2{ color:var(--paper); font-size:var(--step-2); margin:0; max-width:24ch; }
.cta-band p{ color:#c7cbc5; margin:0.3em 0 0; }
.cta-band .btn-primary{ background:var(--flag); color:#241804; }
.cta-band .btn-primary:hover{ background:#f0a13a; }

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb{
  padding-block:0.9rem; border-bottom:1px solid var(--line);
  font-family:var(--font-code); font-size:0.78rem; color:var(--ink-faint);
}
.breadcrumb a{ text-decoration:none; color:var(--ink-faint); }
.breadcrumb a:hover{ color:var(--accent); }
.breadcrumb .sep{ margin:0 0.5em; }
.breadcrumb .current{ color:var(--ink-soft); }

/* ============================================================
   TOOL PAGE HEAD
   ============================================================ */
.tool-head{ padding-block: clamp(2rem,4vw,3rem) clamp(1.6rem,3vw,2.2rem); border-bottom:1px solid var(--line); }
.tool-head .cat-code{ display:inline-block; margin-bottom:0.9rem; }
.tool-head h1{ font-size:var(--step-3); max-width:22ch; }
.tool-head .lede{ font-size:var(--step-1); max-width:56ch; }

/* ============================================================
   CALCULATOR
   ============================================================ */
.calculator{
  border:1px solid var(--line); border-radius:var(--radius-lg); background:var(--paper-raised);
  padding:clamp(1.2rem,3vw,1.8rem); box-shadow:var(--shadow-md);
}
.calc-table-head, .course-row{
  display:grid; grid-template-columns: 1fr 110px 110px 34px; gap:0.8rem; align-items:center;
}
.calc-table-head{
  font-family:var(--font-code); font-size:0.72rem; color:var(--ink-faint);
  padding-bottom:0.5rem; border-bottom:1px solid var(--line); margin-bottom:0.6rem;
}
.course-row{ padding:0.5rem 0; border-bottom:1px dashed var(--line); }
.course-row input, .course-row select{
  width:100%; font-family:var(--font-body); font-size:0.92rem; color:var(--ink);
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  background:var(--paper); padding:0.55em 0.6em;
}
.course-row input:focus, .course-row select:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.row-remove{
  border:1px solid var(--line-strong); background:var(--paper); border-radius:var(--radius-sm);
  width:34px; height:34px; cursor:pointer; color:var(--ink-faint); font-size:1rem; line-height:1;
}
.row-remove:hover{ color:var(--cat-health); border-color:var(--cat-health); }
.calc-actions{ display:flex; justify-content:space-between; align-items:center; margin-top:1rem; flex-wrap:wrap; gap:0.8rem; }
.calc-result{
  margin-top:1.2rem; padding-top:1.1rem; border-top:1px solid var(--line);
  display:flex; align-items:baseline; gap:0.9rem; flex-wrap:wrap;
}
.calc-result .figure{ font-family:var(--font-code); font-size:var(--step-3); font-weight:600; color:var(--accent); }
.calc-result .label{ font-size:0.88rem; color:var(--ink-soft); }
@media (max-width:620px){
  .calc-table-head{ display:none; }
  .course-row{ grid-template-columns:1fr 1fr; row-gap:0.5rem; padding-block:0.8rem; }
  .row-remove{ justify-self:end; }
}

/* ============================================================
   ARTICLE (how it's calculated / worked example)
   ============================================================ */
.tool-article{ max-width:70ch; }
.tool-article h2{ font-size:var(--step-2); margin-top:0.2em; }
.tool-article table{ width:100%; border-collapse:collapse; margin:1rem 0 1.6rem; font-size:0.92rem; }
.tool-article th, .tool-article td{ text-align:left; padding:0.5em 0.8em; border-bottom:1px solid var(--line); }
.tool-article th{ font-family:var(--font-code); font-size:0.75rem; color:var(--ink-faint); font-weight:600; }
.tool-article code{ font-family:var(--font-code); background:var(--paper-raised); padding:0.15em 0.4em; border-radius:var(--radius-sm); border:1px solid var(--line); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-item{ border-bottom:1px solid var(--line); }
.faq-item summary{
  cursor:pointer; list-style:none; padding:1.1rem 0; font-weight:600;
  display:flex; justify-content:space-between; align-items:center; gap:1rem;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{ content:"+"; font-family:var(--font-code); color:var(--ink-faint); font-size:1.2rem; }
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{ padding-bottom:1.1rem; margin:0; max-width:65ch; }

/* ============================================================
   RELATED TOOLS
   ============================================================ */
.related-list{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:0.9rem; }
.related-list a{
  background:var(--paper-raised); padding:1rem 1.2rem; text-decoration:none; color:inherit;
  display:flex; flex-direction:column; gap:0.3rem;
  border:1px solid var(--line); border-radius:var(--radius);
  box-shadow:var(--shadow-sm); transition:box-shadow .15s ease, transform .15s ease;
}
.related-list a:hover{ box-shadow:var(--shadow-md); transform:translateY(-2px); }
.related-list .tag{ font-family:var(--font-code); font-size:0.7rem; color:var(--accent); }
.related-list h3{ font-family:var(--font-body); font-size:0.95rem; font-weight:600; margin:0; }

/* ============================================================
   TOOLS HUB
   ============================================================ */
.hub-search-row{
  display:flex; gap:0.7rem; align-items:center; flex-wrap:wrap;
  border:1px solid var(--line); border-radius:var(--radius-lg); background:var(--paper-raised);
  padding:0.9rem 1.2rem; margin-bottom:1.6rem; box-shadow:var(--shadow-sm);
}
.hub-search-row svg{ flex-shrink:0; color:var(--ink-faint); width:17px; height:17px; }
.hub-search-row input{
  flex:1; min-width:180px; border:0; background:transparent; outline:0;
  font-family:var(--font-body); font-size:1rem; color:var(--ink);
}
.hub-search-row input::placeholder{ color:var(--ink-faint); }
.hub-clear{
  border:1px solid var(--line-strong); background:var(--paper); border-radius:999px;
  font-family:var(--font-code); font-size:0.78rem; padding:0.4em 0.9em; cursor:pointer; color:var(--ink-soft);
}
.hub-clear:hover{ border-color:var(--ink); color:var(--ink); }
.hub-count{ font-family:var(--font-code); font-size:0.78rem; color:var(--ink-faint); white-space:nowrap; }

.jump-nav{ display:flex; gap:0.6rem; flex-wrap:wrap; margin-bottom:2.4rem; }
.jump-nav a{
  font-family:var(--font-code); font-size:0.8rem; text-decoration:none;
  padding:0.45em 0.9em; border-radius:999px; border:1px solid var(--jump-color, var(--line-strong));
  color:var(--jump-color, var(--ink-soft)); background:var(--paper-raised);
  box-shadow:var(--shadow-sm); transition:box-shadow .14s ease, transform .14s ease, background .14s ease, color .14s ease;
}
.jump-nav a:hover{ background:var(--jump-color, var(--ink)); color:var(--white); box-shadow:var(--shadow-md); transform:translateY(-1px); }

.hub-section{ padding-block:clamp(1.8rem,4vw,2.6rem); border-bottom:1px solid var(--line); }
.hub-section-head{ display:flex; align-items:baseline; gap:0.9rem; margin-bottom:1.1rem; flex-wrap:wrap; }
.hub-section-head h2{ font-size:var(--step-2); margin:0; }
.hub-section-head .cat-code{ padding:0.3em 0.6em; font-size:0.78rem; }
.hub-section-head .shown-count{ font-family:var(--font-code); font-size:0.78rem; color:var(--ink-faint); margin-left:auto; }
.hub-section-foot{ margin-top:1rem; }
.hub-section-foot a{ font-size:0.88rem; color:var(--accent); text-decoration:none; }
.hub-section-foot a:hover{ text-decoration:underline; }
.no-results{ display:none; padding:2.5rem 0; text-align:center; color:var(--ink-faint); font-family:var(--font-code); font-size:0.9rem; }
.no-results.show{ display:block; }

/* ============================================================
   CODE EDITOR (for dev tools like JSON Formatter)
   ============================================================ */
.code-toolbar{
  display:flex; align-items:center; gap:0.8rem; flex-wrap:wrap;
  padding-bottom:1rem; margin-bottom:1rem; border-bottom:1px solid var(--line);
}
.code-toolbar label{ font-family:var(--font-code); font-size:0.78rem; color:var(--ink-faint); display:flex; align-items:center; gap:0.4em; }
.code-toolbar select{
  font-family:var(--font-code); font-size:0.82rem; color:var(--ink);
  border:1px solid var(--line-strong); border-radius:var(--radius-sm); background:var(--paper); padding:0.35em 0.5em;
}
.code-toolbar .spacer{ flex:1; }
.code-panes{
  display:grid; grid-template-columns:1fr 1fr; gap:1rem;
}
.code-pane{
  background:var(--paper); display:flex; flex-direction:column;
  border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;
}
.code-pane-label{
  font-family:var(--font-code); font-size:0.72rem; color:var(--ink-faint);
  padding:0.6rem 0.9rem; border-bottom:1px solid var(--line);
}
.code-pane textarea, .code-pane pre{
  flex:1; margin:0; border:0; resize:vertical; min-height:260px;
  font-family:var(--font-code); font-size:0.85rem; line-height:1.6; color:var(--ink);
  background:transparent; padding:0.9rem; outline:0; white-space:pre-wrap; word-break:break-word;
}
.code-pane textarea::placeholder{ color:var(--ink-faint); }
.code-status{
  margin-top:0.9rem; padding:0.7rem 0.95rem; font-family:var(--font-code); font-size:0.82rem;
  border:1px solid var(--line); border-radius:var(--radius-sm); display:none;
}
.code-status.show{ display:block; }
.code-status.ok{ color:var(--accent); border-color:var(--accent); }
.code-status.error{ color:var(--cat-health); border-color:var(--cat-health); }
@media (max-width:760px){
  .code-panes{ grid-template-columns:1fr; }
}

/* ============================================================
   CATEGORY PAGE — tool groups
   ============================================================ */
.tool-group{ margin-bottom:2.6rem; }
.tool-group:last-child{ margin-bottom:0; }
.group-head{
  display:flex; align-items:baseline; gap:0.7rem; margin-bottom:1rem;
  padding-left:0.9rem; border-left:3px solid var(--cat-color, var(--accent));
}
.group-head h3{ font-family:var(--font-body); font-size:1.05rem; font-weight:600; margin:0; }
.group-head .count{ font-family:var(--font-code); font-size:0.75rem; color:var(--ink-faint); }
.category-intro{ max-width:70ch; }

/* large timer/countdown readout */
.big-display{
  font-family:var(--font-code); font-weight:600; text-align:center;
  font-size:clamp(2.2rem, 8vw, 3.8rem); color:var(--ink); letter-spacing:0.02em;
  padding:1rem 0 0.5rem;
}

/* diff viewer lines */
#diff-output{
  font-family:var(--font-code); font-size:0.85rem; line-height:1.6;
  border:1px solid var(--line); border-radius:var(--radius); padding:0.9rem;
  background:var(--paper); overflow-x:auto; white-space:pre;
}
#diff-output .diff-add{ background:color-mix(in srgb, var(--accent) 16%, transparent); }
#diff-output .diff-del{ background:color-mix(in srgb, var(--cat-health) 16%, transparent); text-decoration:line-through; text-decoration-color:color-mix(in srgb, var(--cat-health) 60%, transparent); }
#diff-output .diff-same{ color:var(--ink-soft); }

/* markdown live preview */
.md-preview{
  border:1px solid var(--line); border-radius:var(--radius); background:var(--paper);
  padding:1rem 1.2rem; min-height:260px; overflow:auto;
}
.md-preview h1,.md-preview h2,.md-preview h3{ font-family:var(--font-head); }
.md-preview blockquote{ border-left:3px solid var(--accent); padding-left:1rem; color:var(--ink-soft); margin:1em 0; }
.md-preview pre{ background:var(--paper-raised); padding:0.8em; border-radius:var(--radius-sm); overflow-x:auto; }
.md-preview code{ font-family:var(--font-code); }
.md-preview ul{ padding-left:1.4em; }

/* small inline results table (e.g. heart rate zones) */
.mini-table{ width:100%; border-collapse:collapse; margin-top:1rem; font-size:0.9rem; }
.mini-table td{ padding:0.5em 0.2em; border-bottom:1px solid var(--line); }
.mini-table td:last-child{ text-align:right; font-family:var(--font-code); color:var(--ink); }

/* ============================================================
   ABOUT / CONTACT PAGES
   ============================================================ */
.story{ max-width:70ch; }
.story blockquote{
  margin:1.8rem 0; padding-left:1.2rem; border-left:3px solid var(--accent);
  font-family:var(--font-head); font-size:var(--step-1); color:var(--ink); font-style:italic;
}
.contact-grid{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:clamp(2rem,5vw,3.5rem); align-items:start; }
.contact-form{ display:flex; flex-direction:column; gap:1rem; }
.field{ display:flex; flex-direction:column; gap:0.4rem; }
.field label{ font-family:var(--font-code); font-size:0.75rem; color:var(--ink-faint); }
.field input, .field select, .field textarea{
  font-family:var(--font-body); font-size:0.95rem; color:var(--ink);
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  background:var(--paper-raised); padding:0.7em 0.85em;
}
.field textarea{ resize:vertical; min-height:130px; }
.field input:focus, .field select:focus, .field textarea:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.contact-note{ font-size:0.8rem; color:var(--ink-faint); }
.contact-alt{ border:1px solid var(--line); border-radius:var(--radius-lg); background:var(--paper-raised); padding:1.4rem 1.5rem; box-shadow:var(--shadow-sm); }
.contact-alt h3{ font-size:1.05rem; margin-bottom:0.6em; }
.contact-alt ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:0.7em; }
.contact-alt a{ text-decoration:none; color:var(--accent); font-size:0.92rem; }
.contact-alt a:hover{ text-decoration:underline; }
@media (max-width:800px){ .contact-grid{ grid-template-columns:1fr; } }

/* ============================================================
   CONVERTER (two fields syncing live)
   ============================================================ */
.converter-grid{
  display:grid; grid-template-columns:1fr auto 1fr; gap:1rem; align-items:end;
}
.convert-field{ display:flex; flex-direction:column; gap:0.5rem; }
.convert-field label{ font-family:var(--font-code); font-size:0.75rem; color:var(--ink-faint); }
.convert-field .value-row{ display:flex; gap:0.6rem; }
.convert-field input[type="number"]{
  flex:1.3; min-width:0; font-family:var(--font-code); font-size:1.3rem; color:var(--ink);
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  background:var(--paper); padding:0.6em 0.7em;
}
.convert-field select{
  flex:1; min-width:0; font-family:var(--font-body); font-size:0.92rem; color:var(--ink);
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  background:var(--paper); padding:0.6em 0.5em;
}
.convert-field input:focus, .convert-field select:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.swap-btn{
  width:42px; height:42px; border-radius:50%; border:1px solid var(--line-strong);
  background:var(--paper); color:var(--ink-soft); cursor:pointer; font-size:1.1rem;
  box-shadow:var(--shadow-sm); transition:transform .18s ease, box-shadow .14s ease, color .14s ease, border-color .14s ease;
}
.swap-btn:hover{ color:var(--accent); border-color:var(--accent); box-shadow:var(--shadow-md); }
.swap-btn.spin{ transform:rotate(180deg); }
@media (max-width:640px){
  .converter-grid{ grid-template-columns:1fr; }
  .swap-btn{ justify-self:center; transform:rotate(90deg); }
  .swap-btn.spin{ transform:rotate(270deg); }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{ background:var(--paper-raised); border-top:1px solid var(--line); }
.footer-top{
  padding-block:clamp(2.2rem,5vw,3.2rem);
  display:grid; grid-template-columns: 1.3fr repeat(4, 1fr); gap:2rem;
}
.footer-brand p{ font-size:0.9rem; max-width:32ch; }
.footer-col h4{
  font-family:var(--font-code); font-size:0.75rem; letter-spacing:0.02em;
  color:var(--ink-faint); font-weight:600; margin:0 0 0.9em; text-transform:none;
}
.footer-col ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:0.55em; }
.footer-col a{ text-decoration:none; color:var(--ink-soft); font-size:0.9rem; }
.footer-col a:hover{ color:var(--accent); }
.footer-bottom{
  border-top:1px solid var(--line); padding:1.1rem 0;
  display:flex; justify-content:space-between; align-items:center; gap:1rem; flex-wrap:wrap;
  font-size:0.82rem; color:var(--ink-faint);
}
.footer-bottom .socials{ display:flex; gap:0.9rem; }
.footer-bottom .socials a{ color:var(--ink-faint); text-decoration:none; }
.footer-bottom .socials a:hover{ color:var(--accent); }
@media (max-width:900px){
  .footer-top{ grid-template-columns:1fr 1fr; }
}
@media (max-width:560px){
  .footer-top{ grid-template-columns:1fr; }
}

/* ===== Time Table Maker ===== */
.tt-form{ display:grid; grid-template-columns:2fr 1.2fr 1fr 1fr 1.2fr auto; gap:0.8rem; align-items:end; }
.tt-form .btn{ white-space:nowrap; }
.tt-grid{ display:grid; min-width:640px; border:1px solid var(--line-strong); border-radius:var(--radius-sm); background:var(--paper-raised); position:relative; }
.tt-cell-head{ font-family:var(--font-code); font-size:0.72rem; color:var(--ink-faint); padding:0.5rem; border-bottom:1px solid var(--line-strong); border-left:1px solid var(--line); text-align:center; }
.tt-time{ font-family:var(--font-code); font-size:0.7rem; color:var(--ink-faint); padding:0.2rem 0.4rem; border-top:1px dashed var(--line); }
.tt-slot{ border-top:1px dashed var(--line); border-left:1px solid var(--line); }
.tt-block{ margin:2px; padding:0.3rem 0.45rem; border-radius:4px; background:color-mix(in srgb, var(--accent) 18%, var(--paper-raised)); border-left:3px solid var(--accent); font-size:0.78rem; line-height:1.25; overflow:hidden; z-index:1; }
.tt-block strong{ display:block; font-weight:600; }
.tt-block span{ color:var(--ink-soft); font-size:0.72rem; }
.tt-block.clash{ background:color-mix(in srgb, var(--cat-health) 20%, var(--paper-raised)); border-left-color:var(--cat-health); }
@media (max-width:760px){ .tt-form{ grid-template-columns:1fr 1fr; } }
@media print{
  .site-header, .breadcrumb, .site-footer, .tt-form, .calc-actions, .tool-article, .related-list, .section-head, #tt-msg{ display:none !important; }
  .tt-grid{ min-width:0; }
}

/* ============================================================
   SCIENTIFIC CALCULATOR
   ============================================================ */
.sci-layout{ display:grid; grid-template-columns:minmax(0,1fr) 300px; gap:1.4rem; align-items:start; }
.sci-calc{ max-width:640px; }
.sci-screen{
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:0.8rem 1rem 1rem; margin-bottom:1rem;
}
.sci-top{ display:flex; justify-content:flex-end; margin-bottom:0.3rem; }
.sci-mode{
  font-family:var(--font-code); font-size:0.75rem; font-weight:600; letter-spacing:0.06em;
  padding:0.25em 0.7em; border-radius:99px; border:1px solid var(--flag); color:var(--flag);
  background:transparent; cursor:pointer;
}
.sci-mode:hover{ background:var(--flag); color:#241804; }
.sci-input{
  width:100%; border:0; background:transparent; color:var(--ink); text-align:right;
  font-family:var(--font-code); font-size:var(--step-1); padding:0.3rem 0; outline:none;
  border-bottom:1px dashed var(--line-strong);
}
.sci-input:focus{ border-bottom-color:var(--accent); }
.sci-input::placeholder{ color:var(--ink-faint); }
.sci-result{
  display:block; text-align:right; font-family:var(--font-code); font-weight:600;
  font-size:var(--step-3); color:var(--ink); min-height:1.3em; margin-top:0.4rem;
  overflow-x:auto; white-space:nowrap;
}
.sci-result[data-state="preview"]{ color:var(--ink-faint); }
.sci-result[data-state="final"]{ color:var(--accent); }
.sci-result[data-state="error"]{ color:var(--cat-health); font-size:var(--step-0); white-space:normal; }

.sci-keys{ display:grid; grid-template-columns:repeat(5,1fr); gap:0.5rem; }
.sci-key{
  font-family:var(--font-code); font-size:1rem; font-weight:600; min-height:3rem;
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  background:var(--paper-raised); color:var(--ink); cursor:pointer; padding:0.4rem 0.2rem;
  transition:transform .08s ease, border-color .12s ease, background .12s ease;
}
.sci-key:hover{ border-color:var(--accent); color:var(--accent); }
.sci-key:active{ transform:scale(0.96); }
.sci-key:focus-visible, .sci-mode:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; }
.sci-fn{ background:var(--paper); font-size:0.88rem; color:var(--ink-soft); }
.sci-oper{ color:var(--accent); }
.sci-ctrl{ color:var(--flag); }
.sci-equals{ background:var(--ink); color:var(--paper); border-color:var(--ink); }
.sci-equals:hover{ background:var(--accent-ink); color:var(--paper); border-color:var(--accent-ink); }

.sci-history-box{
  border:1px solid var(--line); border-radius:var(--radius-lg); background:var(--paper-raised);
  padding:1rem 1.1rem; box-shadow:var(--shadow-sm);
}
.sci-hist-head{ display:flex; justify-content:space-between; align-items:center; margin-bottom:0.6rem; }
.sci-hist-head h2{ font-size:var(--step-1); margin:0; }
.sci-small{ padding:0.3em 0.8em; font-size:0.8rem; }
.sci-history{ list-style:none; margin:0; padding:0; max-height:420px; overflow-y:auto; }
.sci-history li{ border-top:1px solid var(--line); }
.sci-history li:first-child{ border-top:0; }
.sci-history button{
  display:flex; flex-direction:column; align-items:flex-end; gap:0.1rem; width:100%;
  background:none; border:0; padding:0.55rem 0.2rem; cursor:pointer; color:var(--ink); font-family:var(--font-code);
}
.sci-history button:hover .sci-h-res{ color:var(--accent); }
.sci-h-expr{ font-size:0.8rem; color:var(--ink-faint); word-break:break-all; }
.sci-h-res{ font-size:1rem; font-weight:600; }
.sci-empty{ color:var(--ink-faint); font-size:0.88rem; padding:0.4rem 0; }

@media (max-width:900px){ .sci-layout{ grid-template-columns:1fr; } .sci-calc{ max-width:none; } }
@media (max-width:420px){ .sci-keys{ gap:0.35rem; } .sci-key{ min-height:2.8rem; font-size:0.95rem; } .sci-fn{ font-size:0.78rem; } }

/* ============================================================
   TYPING SPEED TEST
   ============================================================ */
.ts-passage{
  font-family:var(--font-code); font-size:1.15rem; line-height:1.9; letter-spacing:0.01em;
  padding:1.1rem 1.2rem; background:var(--paper-raised); border:1px solid var(--line);
  border-radius:var(--radius-sm); max-height:11.5em; overflow:hidden; user-select:none; word-break:break-word;
}
.ts-passage .ok{ color:var(--ink); }
.ts-passage .bad{ color:var(--cat-health); background:rgba(200,60,50,0.12); border-radius:2px; }
.ts-passage .todo{ color:var(--ink-faint); }
.ts-passage .cur{ border-left:2px solid var(--accent); margin-left:-2px; animation:ts-blink 1s steps(1) infinite; }
@keyframes ts-blink{ 50%{ border-left-color:transparent; } }
.ts-stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; margin-top:1.2rem; padding-top:1.1rem; border-top:1px solid var(--line); }
.ts-stats div{ display:flex; flex-direction:column; gap:0.2rem; }
.ts-stats .figure{ font-family:var(--font-code); font-size:var(--step-2); font-weight:600; color:var(--accent); }
.ts-stats .label{ font-size:0.82rem; color:var(--ink-soft); }
@media (max-width:620px){ .ts-stats{ grid-template-columns:repeat(2,1fr); } .ts-passage{ font-size:1rem; } }

/* ============================================================
   TRANSCRIPT GENERATOR
   ============================================================ */
.tr-row{ display:grid; grid-template-columns:1fr 1.7fr 90px 90px 34px; gap:0.5rem; margin-bottom:0.5rem; align-items:center; }
.tr-row input, .tr-row select{
  width:100%; padding:0.5rem 0.6rem; border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  background:var(--paper); color:var(--ink); font:inherit; font-size:0.92rem;
}
.tr-row input:focus, .tr-row select:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.tr-head{ font-family:var(--font-code); font-size:0.72rem; color:var(--ink-faint); }
.tr-doc{
  background:#fff; color:#111; border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  padding:2rem 2.2rem; margin-top:1.4rem; font-family:var(--font-body, inherit); line-height:1.45;
}
.tr-doc h2{ font-family:var(--font-serif, serif); text-align:center; font-size:1.5rem; margin:0 0 0.2rem; }
.tr-doc .tr-sub{ text-align:center; margin:0 0 1.2rem; color:#444; }
.tr-doc dl{ display:grid; grid-template-columns:auto 1fr auto 1fr; gap:0.2rem 1rem; margin:0 0 1.2rem; font-size:0.92rem; }
.tr-doc dt{ font-weight:600; }
.tr-doc dd{ margin:0; }
.tr-doc h3{ font-size:1rem; margin:1.2rem 0 0.3rem; border-bottom:1.5px solid #111; padding-bottom:0.2rem; display:flex; justify-content:space-between; }
.tr-doc table{ width:100%; border-collapse:collapse; font-size:0.9rem; }
.tr-doc th, .tr-doc td{ text-align:left; padding:0.28rem 0.4rem; border-bottom:1px solid #ddd; }
.tr-doc th:nth-child(n+2), .tr-doc td:nth-child(n+2){ text-align:right; }
.tr-doc th:first-child, .tr-doc td:first-child{ text-align:left; }
.tr-doc .tr-total{ margin-top:1.4rem; padding-top:0.6rem; border-top:2px solid #111; display:flex; justify-content:space-between; font-weight:600; }
.tr-doc .tr-note{ margin-top:1.2rem; font-size:0.78rem; color:#555; text-align:center; }
@media (max-width:620px){
  .tr-row{ grid-template-columns:1fr 1fr; } .tr-head{ display:none; }
  .tr-doc{ padding:1.2rem; } .tr-doc dl{ grid-template-columns:auto 1fr; }
}
@media print{
  .tool-head, .tr-controls{ display:none !important; }
  .section{ padding:0 !important; } .tr-doc{ border:0; margin:0; padding:0; }
}

/* ============================================================
   KIDS LEARNING ZONE
   ============================================================ */
.kz-tabs{ display:flex; gap:0.5rem; flex-wrap:wrap; margin-bottom:1.2rem; }
.kz-tabs button{
  font:inherit; font-weight:600; padding:0.55rem 1.1rem; border:1px solid var(--line-strong); background:var(--paper);
  color:var(--ink); border-radius:99px; cursor:pointer;
}
.kz-tabs button[aria-selected="true"]{ background:var(--accent); color:#fff; border-color:var(--accent); }
.kz-bar{ display:flex; gap:1.4rem; flex-wrap:wrap; font-family:var(--font-code); font-size:0.9rem; color:var(--ink-soft); margin-bottom:1rem; }
.kz-bar b{ color:var(--accent); }
.kz-big{ font-family:var(--font-code); font-size:clamp(2.2rem,8vw,3.6rem); font-weight:600; text-align:center; margin:0.6rem 0 1.2rem; }
.kz-choices{ display:grid; grid-template-columns:repeat(2,1fr); gap:0.8rem; max-width:420px; margin:0 auto; }
.kz-choices button{
  font:inherit; font-family:var(--font-code); font-size:1.5rem; padding:0.9rem; border:2px solid var(--line-strong);
  background:var(--paper-raised); color:var(--ink); border-radius:var(--radius); cursor:pointer;
}
.kz-choices button:hover:not(:disabled){ border-color:var(--accent); }
.kz-choices button.right{ background:rgba(40,150,90,0.18); border-color:#28965a; }
.kz-choices button.wrong{ background:rgba(200,60,50,0.15); border-color:var(--cat-health); }
.kz-msg{ text-align:center; min-height:1.6em; margin-top:1rem; font-weight:600; }
.kz-opts{ display:flex; gap:1rem; flex-wrap:wrap; align-items:end; margin-bottom:1rem; }
.kz-hint{ text-align:center; color:var(--ink-soft); }
.kz-answer{ display:flex; gap:0.6rem; justify-content:center; flex-wrap:wrap; margin-top:0.4rem; }
.kz-answer input{
  font-family:var(--font-code); font-size:1.4rem; text-align:center; text-transform:uppercase; letter-spacing:0.1em;
  padding:0.6rem; border:2px solid var(--line-strong); border-radius:var(--radius); background:var(--paper); color:var(--ink); max-width:260px;
}
.kz-answer input:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.kz-mem{ display:grid; grid-template-columns:repeat(4,1fr); gap:0.7rem; max-width:420px; margin:0 auto; }
.kz-card{
  aspect-ratio:1; font-size:2rem; border:2px solid var(--line-strong); border-radius:var(--radius); cursor:pointer;
  background:var(--accent); color:transparent; font-family:inherit;
}
.kz-card.up{ background:var(--paper-raised); color:inherit; }
.kz-card.done{ background:rgba(40,150,90,0.18); border-color:#28965a; color:inherit; cursor:default; }

/* ============================================================
   RECEIPT MAKER
   ============================================================ */
.rc-paper{
  width:100%; max-width:340px; margin:1.5rem auto 0; padding:1.4rem 1.2rem;
  background:#fff; color:#111; border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  box-shadow:var(--shadow-md); font-family:var(--font-code); font-size:0.82rem; line-height:1.5;
}
.rc-paper hr{ border:0; border-top:1px dashed #888; margin:0.7rem 0; }
.rc-biz{ text-align:center; font-weight:700; font-size:1rem; margin-bottom:0.2rem; }
.rc-small{ font-size:0.74rem; color:#555; text-align:left; }
.rc-center{ text-align:center; }
.rc-line{ display:flex; justify-content:space-between; gap:0.8rem; }
.rc-line span:last-child{ text-align:right; white-space:nowrap; }
.rc-total{ font-weight:700; font-size:0.95rem; margin-top:0.2rem; }
.rc-note{ text-align:center; margin-top:0.4rem; }
@media print{
  .rc-form, .tool-head, .rc-actions{ display:none !important; }
  .rc-paper{ box-shadow:none; border:0; margin:0 auto; max-width:340px; }
}

/* ---------- Media tools: stat list + canvas plots (QR, Audio Analyser) ---------- */
.stat-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(210px,1fr)); gap:0.6rem; margin:1rem 0 0; }
.stat-grid div{ background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius-sm); padding:0.6rem 0.8rem; }
.stat-grid dt{ font-family:var(--font-code); font-size:0.7rem; color:var(--ink-faint); text-transform:uppercase; letter-spacing:0.03em; }
.stat-grid dd{ margin:0.15rem 0 0; font-weight:600; overflow-wrap:anywhere; }
.plot{ display:block; width:100%; border-radius:var(--radius-sm); border:1px solid var(--line); margin-top:0.4rem; }
.plot-label{ font-family:var(--font-code); font-size:0.75rem; color:var(--ink-faint); margin-top:1rem; }
.meter{ height:10px; background:var(--paper-raised); border:1px solid var(--line); border-radius:99px; overflow:hidden; margin-top:0.5rem; }
.meter span{ display:block; height:100%; width:0; background:var(--accent); transition:width 0.08s linear; }
.tab-row{ display:flex; gap:0.5rem; flex-wrap:wrap; margin-bottom:1rem; }
.qr-preview{ background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius-sm); padding:1rem; text-align:center; }
.qr-preview canvas{ max-width:100%; height:auto; image-rendering:pixelated; }
.qr-form{ display:grid; gap:1rem; }
.field-row{ display:flex; gap:1rem; flex-wrap:wrap; align-items:flex-end; }
.field-row .field{ flex:1; min-width:140px; }
.field input[type=color]{ height:2.4rem; padding:0.15rem; }
.scan-video{ width:100%; max-width:480px; border-radius:var(--radius-sm); background:#000; margin-top:1rem; }

/* ---------- Resume Builder ---------- */
.rb-layout{ display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.05fr); gap:1.5rem; align-items:start; }
.rb-card{ border:1px solid var(--line); border-radius:var(--radius-sm); padding:0.9rem; margin-top:0.8rem; background:var(--paper-raised); }
.rb-group{ margin-top:1.4rem; }
.rb-group > h3{ font-size:1rem; margin:0 0 0.2rem; }
.rb-preview{ position:sticky; top:1rem; }
.rb-sheet{ background:#fff; color:#1b1b1b; border:1px solid var(--line-strong); box-shadow:var(--shadow-md); padding:2.2rem 2.4rem; min-height:520px; font-family:'Source Serif 4',Georgia,serif; --rb-accent:#14966F; }
.rb-sheet *{ box-sizing:border-box; }
.rb-sheet.rb-s-small{ font-size:12px; } .rb-sheet.rb-s-medium{ font-size:13.5px; } .rb-sheet.rb-s-large{ font-size:15px; }
.rb-name{ font-size:2.1em; margin:0; line-height:1.1; font-weight:700; color:#111; }
.rb-title{ font-size:1.15em; margin-top:0.2em; color:var(--rb-accent); font-weight:600; }
.rb-contact{ margin-top:0.5em; font-size:0.9em; color:#444; overflow-wrap:anywhere; }
.rb-sec{ margin-top:1.2em; }
.rb-h{ font-size:0.85em; letter-spacing:0.12em; text-transform:uppercase; margin:0 0 0.5em; color:var(--rb-accent); font-family:'IBM Plex Sans',Arial,sans-serif; font-weight:700; }
.rb-p{ margin:0; line-height:1.45; }
.rb-item{ margin-bottom:0.8em; break-inside:avoid; }
.rb-row{ display:flex; justify-content:space-between; gap:1rem; align-items:baseline; }
.rb-strong{ font-weight:700; }
.rb-dates{ font-size:0.9em; color:#555; white-space:nowrap; }
.rb-ul{ margin:0.3em 0 0; padding-left:1.2em; } .rb-ul li{ margin:0.15em 0; line-height:1.4; }
.rb-classic .rb-head{ text-align:center; border-bottom:2px solid #222; padding-bottom:0.8em; }
.rb-classic .rb-h{ color:#111; border-bottom:1px solid #bbb; padding-bottom:0.25em; }
.rb-classic .rb-title{ color:#333; }
.rb-modern{ font-family:'IBM Plex Sans',Arial,sans-serif; }
.rb-modern .rb-head{ border-left:6px solid var(--rb-accent); padding-left:0.9em; }
.rb-modern .rb-h{ border-bottom:2px solid var(--rb-accent); padding-bottom:0.25em; }
.rb-compact{ font-family:'IBM Plex Sans',Arial,sans-serif; padding:1.6rem 1.8rem; }
.rb-compact .rb-name{ font-size:1.7em; } .rb-compact .rb-sec{ margin-top:0.8em; } .rb-compact .rb-item{ margin-bottom:0.5em; } .rb-compact .rb-ul li{ margin:0; }
@media (max-width:900px){ .rb-layout{ grid-template-columns:1fr; } .rb-preview{ position:static; } .rb-sheet{ padding:1.4rem; } }
@media print{
  body > *:not(main){ display:none !important; }
  main > section:not(:has(.rb-layout)){ display:none !important; }
  .rb-layout{ display:block !important; }
  .rb-form, .rb-preview .calc-actions, .rb-preview > p{ display:none !important; }
  .section{ padding:0 !important; }
  .rb-preview{ position:static; }
  #rb-sheet{ border:0; box-shadow:none; padding:0; min-height:0; }
}
.calculator input[type=range], .calculator input[type=checkbox]{ accent-color:var(--accent); }

/* ---------- Flexbox + Grid generators ---------- */
.fx-box{ display:flex; height:300px; padding:10px; background:var(--paper); border:1px dashed var(--line-strong); border-radius:var(--radius-sm); overflow:auto; }
.fx-item{ appearance:none; border:2px solid transparent; border-radius:6px; background:var(--accent); color:#fff; font:600 1rem var(--font-code); cursor:pointer; min-width:0; flex:none; }
.fx-item.sel{ border-color:var(--ink); box-shadow:0 0 0 2px var(--paper-raised) inset; }
.gen-layout{ display:grid; grid-template-columns:minmax(0,320px) minmax(0,1fr); gap:1.5rem; align-items:start; }
.gen-controls{ display:grid; gap:0.9rem; }
.gen-code{ width:100%; font-family:var(--font-code); font-size:0.82rem; line-height:1.5; margin-top:0.4rem; padding:0.7rem; border:1px solid var(--line-strong); border-radius:var(--radius-sm); background:var(--paper-raised); color:var(--ink); resize:vertical; }
.gl-box{ display:grid; min-height:340px; padding:10px; background:var(--paper); border:1px dashed var(--line-strong); border-radius:var(--radius-sm); position:relative; touch-action:none; user-select:none; -webkit-user-select:none; }
.gl-cell{ border:1px solid var(--line-strong); background:color-mix(in srgb, var(--paper-raised) 80%, transparent); border-radius:4px; cursor:crosshair; min-width:0; min-height:30px; }
.gl-cell.on{ background:color-mix(in srgb, var(--accent) 35%, transparent); border-color:var(--accent); }
.gl-area{ display:flex; align-items:center; justify-content:center; color:#fff; font:700 1.1rem var(--font-code); border-radius:6px; opacity:0.92; pointer-events:none; min-width:0; min-height:0; }
@media (max-width:860px){ .gen-layout{ grid-template-columns:1fr; } }

/* ---------- BIMI Logo Maker ---------- */
.blm-drop{ border:1.5px dashed var(--line-strong); border-radius:var(--radius-sm); padding:0.9rem; background:var(--paper-raised); display:flex; flex-direction:column; gap:0.4rem; font-size:0.85rem; color:var(--ink-faint); }
.blm-drop.drag{ border-color:var(--accent); background:var(--paper); }
.blm-drop input[type=file]{ border:0; padding:0; background:transparent; }
#blm-app .gen-layout, .calculator .gen-layout{ grid-template-columns:minmax(0,340px) minmax(0,1fr); }
#blm-app .gen-controls, #blm-app .field, #blm-app .field-row .field{ min-width:0; }
#blm-app .field input, #blm-app .field select{ max-width:100%; box-sizing:border-box; }
#blm-app .field-row{ flex-wrap:wrap; }
@media (max-width:760px){ #blm-app .gen-layout, .calculator .gen-layout{ grid-template-columns:minmax(0,1fr); } }