/* YogiCalc shared stylesheet */
:root{
  --bg:#f7f8fb; --card:#ffffff; --text:#1a1d29; --muted:#666b7a;
  --brand:#2554ff; --brand-dark:#1a3fcc; --accent:#00b894;
  --border:#e6e8ef; --radius:12px; --shadow:0 2px 10px rgba(20,20,40,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html,body{overflow-x:hidden;max-width:100%}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
header.site-header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}
.nav-wrap{max-width:1100px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 20px;gap:16px}
.logo{font-weight:800;font-size:1.3rem;color:var(--brand)}
.logo span{color:var(--accent)}
nav.main-nav{display:flex;gap:18px;flex-wrap:wrap}
nav.main-nav a{color:var(--text);font-weight:500;font-size:.95rem}
.header-actions{display:flex;gap:10px;align-items:center}
select#langSwitch{border:1px solid var(--border);border-radius:8px;padding:6px 8px;background:#fff}
.container{max-width:1100px;margin:0 auto;padding:24px 20px 60px}
.hero{padding:40px 20px;text-align:center}
.hero h1{font-size:2.1rem;margin-bottom:10px}
.hero p{color:var(--muted);max-width:640px;margin:0 auto 20px}
.search-box{max-width:520px;margin:0 auto;display:flex;gap:8px}
.search-box input{flex:1;padding:12px 14px;border:1px solid var(--border);border-radius:10px;font-size:1rem}
.search-box button{padding:12px 18px;border:none;border-radius:10px;background:var(--brand);color:#fff;font-weight:600;cursor:pointer}
.category-grid,.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-top:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:transform .15s}
.card:hover{transform:translateY(-2px)}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.88rem}
.badge{display:inline-block;background:#eef1ff;color:var(--brand);border-radius:999px;padding:2px 10px;font-size:.72rem;font-weight:600;margin-bottom:8px}
.badge.planned{background:#fff3e0;color:#b8620a}
.calc-page{display:grid;grid-template-columns:1.1fr .9fr;gap:28px}
@media (max-width:820px){.calc-page{grid-template-columns:1fr}}
.calc-form{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;font-size:.88rem;margin-bottom:6px}
.field input,.field select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:.95rem}
.btn{background:var(--brand);color:#fff;border:none;border-radius:8px;padding:11px 18px;font-weight:600;cursor:pointer;font-size:.95rem}
.btn:hover{background:var(--brand-dark)}
.btn-outline{background:#fff;border:1px solid var(--border);color:var(--text)}
.result-box{margin-top:16px;padding:16px;background:#f1f6ff;border:1px solid #d8e4ff;border-radius:10px;display:none}
.result-box.show{display:block}
.result-box .big-result{font-size:1.6rem;font-weight:800;color:var(--brand-dark)}
.steps{margin-top:10px;font-size:.9rem;color:#333}
.steps ol{padding-left:18px;margin:6px 0}
.explain-article{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.explain-article h2{font-size:1.15rem;margin-top:0}
.actions-row{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.icon-btn{border:1px solid var(--border);background:#fff;border-radius:8px;padding:8px 12px;cursor:pointer;font-size:.85rem}
.icon-btn.active{background:#fff4e0;border-color:#f2c14e}
footer.site-footer{border-top:1px solid var(--border);margin-top:40px;padding:26px 20px;color:var(--muted);font-size:.85rem;text-align:center}
.breadcrumbs{font-size:.82rem;color:var(--muted);margin-bottom:14px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#222;color:#fff;padding:10px 18px;border-radius:8px;font-size:.85rem;opacity:0;pointer-events:none;transition:opacity .2s}
.toast.show{opacity:1}
.ad-slot{background:repeating-linear-gradient(45deg,#f0f1f5,#f0f1f5 10px,#e9eaf0 10px,#e9eaf0 20px);border:1px dashed var(--border);border-radius:10px;text-align:center;color:var(--muted);font-size:.8rem;padding:14px;margin:18px 0}
.ad-slot:empty{display:none}
.chain-step{border-left:3px solid var(--brand);padding-left:16px;margin-bottom:20px}
.region-note{font-size:.8rem;color:var(--muted);margin-top:6px}

/* ---- Category showcase pages (v2 layout) ---- */
.cat-hero{border-radius:16px;padding:36px 32px;margin-bottom:32px;color:#fff;background:linear-gradient(135deg,var(--cat-color,#2554ff),var(--cat-color-dark,#1a3fcc))}
.cat-hero .cat-icon{font-size:2.2rem;display:inline-block;margin-bottom:10px}
.cat-hero h1{margin:0 0 10px;font-size:2rem;color:#fff}
.cat-hero p{margin:0;max-width:680px;opacity:.94;line-height:1.6}
.cat-stats{display:flex;gap:22px;margin-top:18px;flex-wrap:wrap}
.cat-stats div{font-size:.85rem;opacity:.9}
.cat-stats strong{display:block;font-size:1.3rem}
.featured-card{display:flex;gap:20px;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;margin-bottom:34px;box-shadow:var(--shadow)}
.featured-card .featured-icon{font-size:2.4rem;flex-shrink:0;width:64px;height:64px;border-radius:14px;background:#eef1ff;display:flex;align-items:center;justify-content:center}
.featured-card h3{margin:0 0 4px;font-size:1.25rem}
.featured-card p{margin:0 0 10px;color:var(--muted)}
.section-group{margin-bottom:38px}
.section-group h2{font-size:1.25rem;border-left:4px solid var(--cat-color,#2554ff);padding-left:12px;margin-bottom:16px}
.calc-card-icon{width:38px;height:38px;border-radius:10px;background:#eef1ff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;margin-bottom:10px}
.faq-block{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px 26px;margin-top:10px}
.faq-block h2{margin-top:0;font-size:1.2rem}
.faq-item{margin-bottom:16px}
.faq-item h3{font-size:.98rem;margin:0 0 4px}
.faq-item p{margin:0;color:var(--muted);font-size:.92rem}

/* ---- Homepage flagship calculator widget ---- */
.flagship-widget{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);max-width:520px;margin:0 auto 30px;overflow:hidden}
.flagship-tabs{display:flex;border-bottom:1px solid var(--border)}
.flagship-tabs button{flex:1;padding:12px 8px;border:none;background:#fafbff;cursor:pointer;font-weight:600;font-size:.85rem;color:var(--muted)}
.flagship-tabs button.active{background:#fff;color:var(--brand);box-shadow:inset 0 -3px 0 var(--brand)}
.flagship-body{padding:16px}
.flagship-display{background:#1a1d29;color:#fff;border-radius:10px;padding:16px;margin-bottom:12px;text-align:right;min-height:64px}
.flagship-display .expr{font-size:.8rem;color:#9aa0b4;min-height:16px;word-break:break-all}
.flagship-display .val{font-size:1.7rem;font-weight:700;word-break:break-all}
.flagship-keys{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.flagship-keys button{padding:12px 4px;border:1px solid var(--border);background:#fff;border-radius:8px;cursor:pointer;font-size:.9rem;font-weight:600}
.flagship-keys button:hover{background:#f1f3fa}
.flagship-keys button.op{background:#eef1ff;color:var(--brand)}
.flagship-keys button.eq{background:var(--brand);color:#fff}
.flagship-keys button.wide{grid-column:span 2}
.flagship-panel{display:none}
.flagship-panel.active{display:block}
.flagship-conv-row{display:flex;gap:8px;margin-bottom:10px}
.flagship-conv-row select,.flagship-conv-row input{flex:1;padding:8px;border:1px solid var(--border);border-radius:8px}

/* ---- Global search & browse drawer ---- */
.search-drawer-overlay{position:fixed;inset:0;background:rgba(20,20,35,.45);z-index:100;display:none;justify-content:flex-end}
.search-drawer-overlay.open{display:flex}
.search-drawer{width:min(380px,92vw);height:100%;background:#fff;box-shadow:-8px 0 30px rgba(0,0,0,.15);display:flex;flex-direction:column;padding:20px;overflow-y:auto;animation:drawerIn .18s ease-out}
@keyframes drawerIn{from{transform:translateX(24px);opacity:.4}to{transform:translateX(0);opacity:1}}
.search-drawer-head{display:flex;gap:10px;align-items:center;margin-bottom:14px}
.search-drawer-head input{flex:1;padding:11px 14px;border:1px solid var(--border);border-radius:10px;font-size:.95rem}
.drawer-search-results{display:flex;flex-direction:column;gap:6px;margin-bottom:10px}
.drawer-result{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;background:#fafbff}
.drawer-result:hover{background:#eef1ff}
.drawer-no-results{color:var(--muted);font-size:.88rem}
.search-drawer-cats h4{margin:10px 0 10px;font-size:.85rem;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.drawer-cat-list{display:flex;flex-direction:column;gap:4px}
.drawer-cat-row{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:8px;font-size:.9rem;color:var(--text)}
.drawer-cat-row:hover{background:#f1f3fa;text-decoration:none}
.drawer-cat-count{color:var(--muted);font-size:.8rem;background:#eef1ff;border-radius:999px;padding:1px 9px}

/* ---- Sidebar layout (Tools hub & similar pages) ---- */
.layout-sidebar{display:grid;grid-template-columns:240px 1fr;gap:30px;align-items:start}
@media (max-width:860px){.layout-sidebar{grid-template-columns:1fr}}
.tools-sidebar{position:sticky;top:84px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;box-shadow:var(--shadow)}
.tools-sidebar h4{margin:0 0 10px;font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.tools-sidebar a{display:flex;justify-content:space-between;padding:9px 10px;border-radius:8px;font-size:.9rem;color:var(--text)}
.tools-sidebar a:hover,.tools-sidebar a.active{background:#eef1ff;color:var(--brand);text-decoration:none}
.tools-sidebar .count{color:var(--muted);font-size:.78rem}

/* ---- Tool pages (text/dev/design tools) ---- */
.tool-textarea{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;font-size:.95rem;font-family:inherit;min-height:160px;resize:vertical}
.tool-textarea.mono{font-family:'SFMono-Regular',Consolas,Monaco,monospace;font-size:.85rem}
.tool-btn-row{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.tool-stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;margin-top:14px}
.tool-stat{background:#f1f6ff;border:1px solid #d8e4ff;border-radius:10px;padding:12px;text-align:center}
.tool-stat strong{display:block;font-size:1.4rem;color:var(--brand-dark)}
.tool-stat span{font-size:.78rem;color:var(--muted)}
.tool-error{color:#c0392b;background:#fdecea;border:1px solid #f5c2bc;border-radius:8px;padding:10px 12px;margin-top:10px;font-size:.88rem;display:none}
.tool-error.show{display:block}
.tool-copy-row{display:flex;gap:8px;align-items:center;margin-top:8px}
.tool-field-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.tool-field-row label{font-size:.85rem;font-weight:600;display:flex;flex-direction:column;gap:6px}
.tool-field-row input,.tool-field-row select{padding:8px 10px;border:1px solid var(--border);border-radius:8px}

/* ---- Mobile hamburger nav (injected by main.js, all pages) ---- */
.nav-hamburger{display:none;flex-direction:column;justify-content:center;gap:4px;width:36px;height:36px;border:none;background:none;cursor:pointer;padding:6px;order:-1}
.nav-hamburger span{display:block;width:100%;height:2px;background:var(--text);border-radius:2px;transition:transform .2s,opacity .2s}
.nav-hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-hamburger.active span:nth-child(2){opacity:0}
.nav-hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---- Mobile breakpoint: header, hero, widgets, category pages ---- */
@media (max-width:720px){
  .nav-wrap{flex-wrap:wrap;padding:12px 16px;position:relative}
  .nav-hamburger{display:flex}
  nav.main-nav{display:none;flex-direction:column;gap:2px;position:absolute;top:100%;left:0;right:0;background:var(--card);border-bottom:1px solid var(--border);box-shadow:var(--shadow);padding:10px 16px 16px;z-index:30}
  nav.main-nav.nav-open{display:flex}
  nav.main-nav a{padding:10px 4px;border-bottom:1px solid var(--border)}
  nav.main-nav a:last-child{border-bottom:none}
  .header-actions{gap:8px}
  .header-actions .icon-btn{padding:8px 10px;font-size:.82rem}
  select#langSwitch{padding:8px 6px;font-size:.85rem}

  .container{padding:16px 14px 40px}
  .hero{padding:24px 8px}
  .hero h1{font-size:1.5rem;line-height:1.3}
  .hero p{font-size:.92rem}
  .search-box{flex-direction:column}
  .search-box input{width:100%}

  .flagship-widget{max-width:100%;margin-left:0;margin-right:0;border-radius:14px}
  .flagship-tabs button{font-size:.78rem;padding:11px 4px}
  .flagship-keys button{padding:14px 4px;font-size:.95rem}
  .flagship-display .val{font-size:1.4rem}

  .category-grid,.calc-grid{grid-template-columns:1fr;gap:12px}
  .card{padding:16px}

  .cat-hero{padding:24px 18px;border-radius:14px}
  .cat-hero h1{font-size:1.5rem}
  .cat-hero p{font-size:.92rem}
  .cat-stats{gap:14px}
  .cat-stats strong{font-size:1.1rem}

  .featured-card{flex-direction:column;align-items:flex-start;text-align:left;padding:18px}
  .featured-card .featured-icon{width:52px;height:52px;font-size:2rem}

  .faq-block{padding:18px}
  .explain-article{padding:16px}
  .calc-form{padding:16px}

  .layout-sidebar{gap:16px}
  .tools-sidebar{position:static}

  .search-drawer{width:100vw}
}