/* ============================================================
   calcbasepro.com — /assets/css/main.css
   Brand tokens ported verbatim from the CADBlockHub theme.
   Every color/size in this file derives from these tokens.
   ============================================================ */

:root{
  --bg:#faf9f5;
  --bg-alt:#f2eee6;
  --card:#ffffff;
  --card-soft:#fdf6f3;
  --thumb-bg:#f4f1eb;
  --text:#16130f;
  --text-2:#3d3831;
  --muted:#7b7a72;
  --brand:#d9704f;
  --brand-dark:#bf5738;
  --brand-soft:#fbeee9;
  --border:#e8e1d6;
  --border-strong:#d8cfc1;
  --error:#b3261e;
  --shadow:0 1px 2px rgba(22,19,15,.04), 0 8px 24px -16px rgba(22,19,15,.18);
  --shadow-lg:0 2px 4px rgba(22,19,15,.05), 0 24px 48px -24px rgba(22,19,15,.25);
  --radius:14px;
  --radius-sm:10px;
  --radius-pill:999px;
  --wrap:1180px;
  --font-display:"Playfair Display", Georgia, "Times New Roman", serif;
  --font-body:"DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --step:clamp(1rem, .9rem + .4vw, 1.05rem);
}

html[data-theme="dark"]{
  --bg:#14120f;
  --bg-alt:#1b1815;
  --card:#1f1c18;
  --card-soft:#25201c;
  --thumb-bg:#25211c;
  --text:#f5f1ea;
  --text-2:#ded8ce;
  --muted:#a29b90;
  --brand:#e5825f;
  --brand-dark:#d9704f;
  --brand-soft:#33231d;
  --border:#302b25;
  --border-strong:#3d372f;
  --error:#ff8a80;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px -16px rgba(0,0,0,.6);
  --shadow-lg:0 2px 4px rgba(0,0,0,.35), 0 24px 48px -24px rgba(0,0,0,.7);
}

/* ---------------- Reset & base ---------------- */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:var(--step);
  line-height:1.65;
  color:var(--text);
  background:var(--bg);
}
img,svg{display:block;max-width:100%}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.2;
  color:var(--text);
  margin:0 0 .6em;
  overflow-wrap:break-word;
}
h1{font-size:clamp(1.75rem,1.4rem + 1.8vw,2.5rem)}
h2{font-size:clamp(1.35rem,1.15rem + 1vw,1.75rem)}
h3{font-size:clamp(1.1rem,1rem + .5vw,1.3rem)}
p{margin:0 0 1em;color:var(--text-2)}
a{color:var(--brand-dark);text-decoration:none}
a:hover{text-decoration:underline}
ul,ol{color:var(--text-2)}
hr{border:0;border-top:1px solid var(--border);margin:2rem 0}
.muted{color:var(--muted)}
strong{color:var(--text)}

:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:2px}

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

/* ---------------- Accessibility utilities ---------------- */

.screen-reader-text{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--brand);color:#fff;padding:.6rem 1rem;
  border-radius:0 0 var(--radius-sm) 0;font-weight:700;
}
.skip-link:focus{left:0}

/* ---------------- Layout ---------------- */

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.section{padding:2.5rem 0}
.section-head{margin-bottom:1.25rem}
.section-head h2{margin-bottom:.25rem}
.section-head p{color:var(--muted);margin:0}

/* ---------------- Header ---------------- */

.site-header{
  position:sticky;top:0;z-index:100;height:58px;
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
@supports not (background: color-mix(in srgb, red 50%, blue)){
  .site-header{background:var(--bg)}
}
.site-header-inner{display:flex;align-items:center;gap:1rem;height:58px}
.site-logo{display:flex;align-items:center;gap:.5rem;color:var(--text)}
.site-logo:hover{text-decoration:none}
.site-logo-mark{color:var(--brand);display:flex}
.site-logo-text{font-family:var(--font-display);font-weight:700;font-size:1.2rem;letter-spacing:.01em}
.site-logo-accent{color:var(--brand)}

.site-nav{margin-left:auto}
.site-nav ul{display:flex;gap:.25rem;list-style:none;margin:0;padding:0}
.site-nav a{
  display:block;padding:.45rem .7rem;border-radius:var(--radius-pill);
  color:var(--text-2);font-weight:500;font-size:.925rem;
}
.site-nav a:hover{background:var(--bg-alt);color:var(--text);text-decoration:none}
.site-nav .nav-all{color:var(--brand-dark);font-weight:700}

.site-header-actions{display:flex;align-items:center;gap:.35rem}
.theme-toggle,.nav-toggle{
  display:flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:var(--radius-pill);
  background:none;border:1px solid transparent;color:var(--text-2);cursor:pointer;
}
.theme-toggle:hover,.nav-toggle:hover{background:var(--bg-alt);color:var(--text)}
html[data-theme="light"] .icon-moon{display:none}
html[data-theme="dark"] .icon-sun{display:none}

.nav-toggle{display:none;flex-direction:column;gap:4px}
.nav-toggle-bar{width:18px;height:2px;background:currentColor;border-radius:2px}

/* ---------------- Buttons, chips, pills ---------------- */

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.6rem 1.25rem;border-radius:var(--radius-pill);
  background:var(--brand);color:#fff;font-weight:700;font-size:.95rem;
  border:1px solid var(--brand);cursor:pointer;font-family:var(--font-body);
  transition:background .15s ease;
}
.btn:hover{background:var(--brand-dark);border-color:var(--brand-dark);text-decoration:none;color:#fff}
.btn-ghost{background:transparent;color:var(--brand-dark);border:1px solid var(--border-strong)}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-block{display:flex;width:100%}
.btn-lg{padding:.85rem 1.75rem;font-size:1.05rem}

.chip{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.25rem .75rem;border-radius:var(--radius-pill);
  background:var(--bg-alt);border:1px solid var(--border);
  color:var(--text-2);font-size:.825rem;font-weight:500;
}
.pill{
  display:inline-flex;align-items:center;
  padding:.2rem .7rem;border-radius:var(--radius-pill);
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:.8rem;font-weight:700;letter-spacing:.02em;
}

/* ---------------- Cards ---------------- */

.card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:1.5rem;
}
.card-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;
}
.card-mini{
  display:flex;gap:.85rem;align-items:flex-start;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-sm);box-shadow:var(--shadow);
  padding:1rem;color:var(--text);
  transition:border-color .15s ease, box-shadow .15s ease;
}
.card-mini:hover{border-color:var(--brand);box-shadow:var(--shadow-lg);text-decoration:none}
.card-mini-icon{
  flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--radius-sm);
  background:var(--brand-soft);color:var(--brand-dark);
}
.card-mini-body{display:flex;flex-direction:column;gap:.15rem}
.card-mini-title{font-weight:700;font-size:.975rem;color:var(--text)}
.card-mini-desc{font-size:.85rem;color:var(--muted);line-height:1.45}

/* ---------------- Breadcrumb ---------------- */

.breadcrumb{padding:1rem 0 0;font-size:.85rem}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:.35rem;list-style:none;margin:0;padding:0}
.breadcrumb li{color:var(--muted)}
.breadcrumb li+li::before{content:"/";margin-right:.35rem;color:var(--border-strong)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand-dark)}
.breadcrumb [aria-current="page"]{color:var(--text-2);font-weight:500}

/* ---------------- Calculator card & forms ---------------- */

.calc-card{
  background:var(--card);border:1px solid var(--border-strong);
  border-radius:var(--radius);box-shadow:var(--shadow-lg);
  padding:1.5rem;
  margin-bottom:32px; /* mandatory clearance before the post_result ad slot */
}
.calc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem 1.25rem}
.field{display:flex;flex-direction:column;gap:.35rem}
.field label{font-weight:700;font-size:.875rem;color:var(--text)}
.field .hint{font-size:.8rem;color:var(--muted)}
.field input[type="number"],.field input[type="text"],.field select{
  width:100%;padding:.6rem .8rem;
  border:1px solid var(--border-strong);border-radius:var(--radius-sm);
  background:var(--card);color:var(--text);
  font-family:var(--font-body);font-size:1rem;
}
.field input:focus,.field select:focus{border-color:var(--brand);outline:2px solid var(--brand);outline-offset:1px}
.field input[aria-invalid="true"]{border-color:var(--error)}
.field-error{color:var(--error);font-size:.825rem;margin:.25rem 0 0;font-weight:500}

.calc-actions{display:flex;gap:.75rem;flex-wrap:wrap;margin-top:1.25rem}

/* ---------------- Result box ---------------- */

.result-box{
  background:var(--brand-soft);
  border:1px solid var(--brand);
  border-radius:var(--radius);
  padding:1.25rem 1.5rem;
  margin-top:1.25rem;
}
.result-box .result-label{font-size:.825rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--brand-dark);margin:0 0 .25rem}
.result-box .result-value{font-family:var(--font-display);font-size:clamp(1.5rem,1.3rem + 1vw,2rem);font-weight:700;color:var(--text);margin:0}
.result-box .result-sub{font-size:.9rem;color:var(--text-2);margin:.35rem 0 0}
.medical-disclaimer{
  background:var(--card-soft);border:1px solid var(--border-strong);
  border-radius:var(--radius-sm);padding:.85rem 1rem;
  font-size:.875rem;color:var(--text-2);margin-top:1rem;
}

/* ---------------- Tables ---------------- */

.table-wrap{
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  margin:1.25rem 0;
  background:var(--card);
}
.data-table{
  width:100%;border-collapse:collapse;
  font-size:.925rem;min-width:480px;
}
.data-table.table-fixed{table-layout:fixed} /* wide reference tables: stop post-font reflow */
.data-table caption{
  text-align:left;padding:.75rem 1rem;
  font-weight:700;color:var(--text);border-bottom:1px solid var(--border);
}
.data-table th,.data-table td{
  padding:.6rem 1rem;text-align:left;
  border-bottom:1px solid var(--border);color:var(--text-2);
}
.data-table thead th{
  background:var(--bg-alt);color:var(--text);
  font-weight:700;font-size:.85rem;letter-spacing:.02em;
}
.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td{border-bottom:0}
.data-table tbody tr:hover{background:var(--card-soft)}

/* Sticky first column on wide tables */
.table-sticky-col th:first-child,
.table-sticky-col td:first-child{
  position:sticky;left:0;background:var(--card);z-index:1;
  border-right:1px solid var(--border);
}
.table-sticky-col thead th:first-child{background:var(--bg-alt)}

/* Stacked-card table mode under 640px (opt-in via .table-stack +
   data-label attributes on <td>) */
@media (max-width:640px){
  .table-stack{min-width:0}
  .table-stack thead{display:none}
  .table-stack tbody tr{
    display:block;padding:.5rem 0;
    border-bottom:1px solid var(--border);
  }
  .table-stack tbody tr:last-child{border-bottom:0}
  .table-stack tbody td{
    display:flex;justify-content:space-between;gap:1rem;
    border:0;padding:.35rem 1rem;
  }
  .table-stack tbody td::before{
    content:attr(data-label);
    font-weight:700;color:var(--text);flex:0 0 45%;
  }
}

/* ---------------- Ad slot system ---------------- */
/* Height is reserved BEFORE the ad loads — mandatory for CLS.  */

.ad-slot{
  position:relative;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:var(--bg-alt);
  border-radius:var(--radius-sm);
  margin:2rem 0;
  overflow:hidden;
}
.ad-label{
  position:absolute;top:6px;left:10px;
  font-size:.65rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);
}
.ad-slot--top{min-height:100px}          /* responsive leaderboard */
.ad-slot--post_result,
.ad-slot--mid_content,
.ad-slot--pre_faq,
.ad-slot--footer{min-height:280px}       /* in-content rectangles */
.ad-slot--sidebar{
  min-height:600px;width:300px;
  position:sticky;top:78px;margin:0;
}

/* CSS backstop for the desktop-only slots (PHP already omits them
   from the DOM on mobile UAs; this covers UA edge cases). */
@media (max-width:767px){
  .ad-slot--top,.ad-slot--sidebar{display:none}
}

@media print{
  .ad-slot{display:none}
}

/* Two-column tool layout with sticky sidebar rail (desktop) */
.tool-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:2rem}
@media (min-width:1024px){
  .tool-layout.has-sidebar{grid-template-columns:minmax(0,1fr) 300px}
}

/* ---------------- Tabs ---------------- */

.tabs{margin:1.25rem 0}
.tab-nav{
  display:flex;gap:.25rem;flex-wrap:wrap;
  border-bottom:1px solid var(--border);margin-bottom:1rem;
  padding:0;list-style:none;
}
.tab-nav button{
  padding:.5rem 1rem;border:0;background:none;cursor:pointer;
  font-family:var(--font-body);font-size:.925rem;font-weight:500;
  color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px;
}
.tab-nav button[aria-selected="true"]{
  color:var(--brand-dark);border-bottom-color:var(--brand);font-weight:700;
}
.tab-panel[hidden]{display:none}

/* ---------------- FAQ ---------------- */

.faq details{
  border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--card);margin-bottom:.6rem;
}
.faq summary{
  padding:.85rem 1rem;cursor:pointer;font-weight:700;color:var(--text);
  list-style:none;position:relative;padding-right:2.5rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:1rem;top:50%;transform:translateY(-50%);
  color:var(--brand-dark);font-size:1.2rem;font-weight:400;
}
.faq details[open] summary::after{content:"–"}
.faq details > div{padding:0 1rem .85rem;color:var(--text-2)}
/* No ad slot may ever render inside .faq details — enforced in templates. */

/* ---------------- Footer ---------------- */

.site-footer{
  background:var(--bg-alt);
  border-top:1px solid var(--border);
  margin-top:3rem;padding:2.5rem 0 1.5rem;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem;
  margin-bottom:2rem;
}
.footer-logo{font-family:var(--font-display);font-weight:700;font-size:1.2rem;color:var(--text);margin:0 0 .35rem}
.footer-tagline{color:var(--muted);font-size:.9rem;max-width:32ch}
.footer-head{font-weight:700;font-size:.825rem;letter-spacing:.05em;text-transform:uppercase;color:var(--text);margin:0 0 .6rem}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem}
.footer-col a{color:var(--text-2);font-size:.9rem}
.footer-col a:hover{color:var(--brand-dark)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:1.25rem;
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
}
.footer-bottom p{margin:0;font-size:.825rem;color:var(--muted)}
.footer-note{max-width:52ch}

/* ---------------- Breakpoints: 480 / 768 / 1024 / 1180 ---------------- */

@media (max-width:1180px){
  .wrap{padding:0 24px}
}

@media (max-width:1024px){
  .card-row{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:768px){
  .site-nav{
    display:none;
    position:absolute;top:58px;left:0;right:0;
    background:var(--bg);border-bottom:1px solid var(--border);
    box-shadow:var(--shadow-lg);padding:.75rem 20px 1rem;
    margin-left:0;
  }
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:.15rem}
  .site-nav a{padding:.6rem .7rem;border-radius:var(--radius-sm);font-size:1rem}
  .nav-toggle{display:flex}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .calc-grid{grid-template-columns:1fr}
  .section{padding:2rem 0}
}

@media (max-width:480px){
  .card-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .calc-actions .btn{width:100%}
  .footer-bottom{flex-direction:column}
}

/* ============ Phase 3: homepage, listings, search, 404 ============ */

.hero{padding:3.5rem 0 2.5rem;background:var(--bg-alt);border-bottom:1px solid var(--border)}
.hero h1{font-size:clamp(1.9rem,1.4rem + 2.2vw,2.9rem);margin-bottom:.75rem;max-width:22ch}
.hero-sub{color:var(--text-2);max-width:62ch;font-size:1.05rem;margin-bottom:1.5rem}
.hero-cta{display:flex;gap:.75rem;flex-wrap:wrap;margin:0}

.page-intro{color:var(--text-2);max-width:70ch;margin:.5rem 0 1.5rem}
.home-note{color:var(--text-2);max-width:75ch}

.tool-search{display:flex;gap:.6rem;max-width:520px;margin-bottom:1.5rem}
.tool-search input[type=search]{
  flex:1;padding:.7rem .9rem;font:inherit;color:var(--text);
  background:var(--card);border:1px solid var(--border-strong);border-radius:var(--radius-sm);
}
.tool-search input[type=search]:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.search-status{color:var(--muted);margin-bottom:1.25rem}

.tools-block{margin-bottom:2.25rem}

.chip-row{display:flex;gap:.5rem;flex-wrap:wrap}

/* In-grid ad cell on category listings: spans the full row so the
   rectangle never masquerades as a tool card. */
.grid-ad{grid-column:1 / -1}

@media (max-width:480px){
  .tool-search{flex-direction:column}
  .hero{padding:2.5rem 0 2rem}
}

/* ============ Phase 4: content pages, contact form ============ */

.content-page{max-width:760px}
.content-page h2{margin-top:2rem;margin-bottom:.6rem}
.content-page p{margin-bottom:1rem;color:var(--text-2)}
.content-page p strong{color:var(--text)}
.legal-updated{color:var(--muted);font-size:.9rem;margin-top:-.5rem}

.contact-form{max-width:560px;margin-top:1.5rem}
.contact-form .form-row{margin-bottom:1.1rem}
.contact-form label{display:block;font-weight:700;font-size:.92rem;margin-bottom:.35rem}
.contact-form input[type=text],
.contact-form input[type=email],
.contact-form textarea{
  width:100%;padding:.7rem .9rem;font:inherit;color:var(--text);
  background:var(--card);border:1px solid var(--border-strong);border-radius:var(--radius-sm);
}
.contact-form input:focus-visible,
.contact-form textarea:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.contact-form [aria-invalid="true"]{border-color:var(--error)}
.contact-alt{margin-top:1.5rem;color:var(--muted)}

.form-notice{border-radius:var(--radius-sm);padding:.9rem 1.1rem;margin-bottom:1.25rem;max-width:560px}
.form-notice-ok{background:var(--brand-soft);border:1px solid var(--brand)}
.form-notice-err{background:var(--bg-alt);border:1px solid var(--border-strong)}

/* Honeypot: parked far off-screen — NOT display:none, which
   sophisticated bots detect and skip. */
.hp-field{position:absolute;left:-9999px;top:-9999px;height:1px;overflow:hidden}

/* ============ Phase 5: tool page internals ============ */

.shape-fields{border:0;padding:0;margin:0}
.tool-section{margin:2.25rem 0}
.tool-section h2{margin-bottom:.75rem}
.tool-section h3{margin:1.25rem 0 .5rem}
.tool-section p{color:var(--text-2);margin-bottom:.9rem}
.howto-list{padding-left:1.25rem;color:var(--text-2)}
.howto-list li{margin-bottom:.6rem}
.formula-list{list-style:none;padding:0;color:var(--text-2)}
.formula-list li{padding:.55rem .8rem;background:var(--card-soft);border:1px solid var(--border);
  border-radius:var(--radius-sm);margin-bottom:.5rem}
.notes-list{list-style:none;padding:0;color:var(--text-2)}
.notes-list li{padding-left:1.1rem;position:relative;margin-bottom:.7rem}
.notes-list li::before{content:"";position:absolute;left:0;top:.55em;width:.45em;height:.45em;
  border-radius:50%;background:var(--brand)}
.calc-note,.table-note{font-size:.85rem;color:var(--muted);margin-top:.6rem}
.last-updated{color:var(--muted);font-size:.85rem;margin-top:2rem}

/* ============ Editorial guides ============ */
.guide-article .page-intro{font-size:1.05rem}
.guide-meta{color:var(--muted);font-size:.85rem;margin:-.4rem 0 1rem}
.guide-body h2{margin:1.9rem 0 .7rem;font-family:var(--font-display)}
.guide-body p{color:var(--text-2);margin-bottom:1rem;line-height:1.7}
.guide-body a{color:var(--brand);text-decoration:underline;text-underline-offset:2px}
.guide-body a:hover{color:var(--brand-dark)}
.guide-tools{margin-top:2.5rem}
.guide-tools h2{margin-bottom:1rem}
.guide-grid{margin-top:1.5rem}
.guide-card{flex-direction:column}
.guide-card-meta{display:block;margin-top:.5rem;color:var(--muted);font-size:.8rem}