/* Wisedo.org — Design System v2.0 */
:root{
  --blue:#3b82f6;--blue-d:#1d4ed8;--green:#22c55e;--green-d:#15803d;
  --amber:#f59e0b;--amber-d:#b45309;--rose:#f43f5e;--violet:#8b5cf6;
  --ink:#0f172a;--ink2:#334155;--ink3:#64748b;--ink4:#94a3b8;
  --bg:#f8fafc;--bg2:#f1f5f9;--line:#e2e8f0;--white:#ffffff;
  --bpal:#eff6ff;--bpg:#f0fdf4;--bpa:#fffbeb;--bpr:#fff1f2;--bpv:#f5f3ff;
  --r:12px;--rl:16px;--shadow:0 1px 3px rgba(0,0,0,.08),0 4px 16px rgba(0,0,0,.06);
  --shadow-lg:0 8px 32px rgba(0,0,0,.12);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Inter',system-ui,sans-serif;font-size:1rem;line-height:1.6;color:var(--ink);background:var(--bg);min-height:100vh}

/* ── Typography ── */
h1,h2,h3,h4,h5{font-family:'Outfit',sans-serif;line-height:1.25;font-weight:700;color:var(--ink)}
h1{font-size:clamp(1.75rem,4vw,2.75rem)}
h2{font-size:clamp(1.25rem,3vw,1.875rem);margin:2rem 0 .75rem}
h3{font-size:1.25rem;margin:1.5rem 0 .5rem}
h4{font-size:1rem;margin:1rem 0 .375rem}
p{margin:.75rem 0;color:var(--ink2)}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:'JetBrains Mono',monospace;font-size:.875em;background:var(--bg2);padding:.125rem .375rem;border-radius:4px;color:var(--violet)}
strong{font-weight:600;color:var(--ink)}

/* ── Layout ── */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.page-wrap{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}
@media(max-width:900px){.page-wrap{grid-template-columns:1fr}}
.main-col{}
.side-col{position:sticky;top:88px}

/* ── Nav ── */
.nav{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100;height:64px;display:flex;align-items:center}
.nav-inner{display:flex;align-items:center;gap:24px;width:100%}
.nav-logo{font-family:'Outfit',sans-serif;font-size:1.25rem;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:8px;flex-shrink:0}
.nav-logo span{background:linear-gradient(135deg,var(--blue),var(--violet));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;gap:4px;margin-left:16px}
.nav-links a{font-size:.875rem;font-weight:500;color:var(--ink3);padding:6px 10px;border-radius:8px;transition:.15s}
.nav-links a:hover{color:var(--ink);background:var(--bg2);text-decoration:none}
.nav-search{flex:1;max-width:340px;position:relative;margin-left:auto}
.nav-search input{width:100%;padding:9px 16px 9px 38px;border:1.5px solid var(--line);border-radius:10px;font-size:.875rem;background:var(--bg);outline:none;transition:.15s;font-family:inherit}
.nav-search input:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(59,130,246,.12)}
.nav-search-icon{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--ink4);pointer-events:none;font-size:.875rem}
.nav-cta{padding:9px 18px;background:linear-gradient(135deg,var(--blue),var(--blue-d));color:#fff;border-radius:10px;font-size:.875rem;font-weight:600;font-family:'Outfit',sans-serif;flex-shrink:0}
.nav-cta:hover{text-decoration:none;opacity:.9}
.nav-hamburger{display:none;background:none;border:none;cursor:pointer;padding:4px;color:var(--ink)}
@media(max-width:768px){.nav-links{display:none}.nav-hamburger{display:block}.nav-search{max-width:200px}}
@media(max-width:500px){.nav-search{display:none}}

/* Search Dropdown */
.search-dropdown{position:absolute;top:calc(100% + 6px);left:0;right:0;background:#fff;border:1.5px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);z-index:200;display:none;max-height:360px;overflow-y:auto}
.search-dropdown.show{display:block}
.search-result-item{display:flex;align-items:center;gap:12px;padding:11px 16px;cursor:pointer;border-bottom:1px solid var(--line);transition:.1s}
.search-result-item:last-child{border-bottom:none}
.search-result-item:hover{background:var(--bg2)}
.sri-icon{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0}
.sri-text .sri-name{font-size:.875rem;font-weight:600;color:var(--ink)}
.sri-text .sri-cat{font-size:.75rem;color:var(--ink4)}
.search-empty{padding:20px;text-align:center;color:var(--ink3);font-size:.875rem}

/* ── Hero ── */
.hero{padding:72px 0 56px;text-align:center;background:linear-gradient(180deg,var(--bpal) 0%,var(--bg) 100%)}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1.5px solid var(--line);border-radius:100px;padding:5px 14px;font-size:.8125rem;font-weight:600;color:var(--ink3);margin-bottom:20px}
.hero h1{margin-bottom:16px}
.hero-sub{font-size:1.125rem;color:var(--ink3);max-width:600px;margin:0 auto 32px}
.hero-search{display:flex;gap:0;max-width:520px;margin:0 auto 24px;background:#fff;border:2px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);transition:.2s}
.hero-search:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.hero-search input{flex:1;padding:14px 20px;border:none;outline:none;font-size:1rem;font-family:inherit;background:transparent}
.hero-search button{padding:12px 24px;background:linear-gradient(135deg,var(--blue),var(--blue-d));color:#fff;border:none;font-family:'Outfit',sans-serif;font-size:.9375rem;font-weight:700;cursor:pointer;transition:.15s}
.hero-search button:hover{opacity:.9}
.hero-stats{display:flex;gap:32px;justify-content:center;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat-n{font-family:'Outfit',sans-serif;font-size:1.5rem;font-weight:800;color:var(--ink)}
.hero-stat-l{font-size:.8125rem;color:var(--ink4)}

/* ── Section ── */
.section{padding:56px 0}
.section-alt{background:var(--bg2)}
.section-header{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:28px;flex-wrap:wrap}
.section-title{font-family:'Outfit',sans-serif;font-size:1.5rem;font-weight:800;color:var(--ink)}
.section-link{font-size:.875rem;color:var(--blue);font-weight:600;white-space:nowrap}

/* ── Category Cards ── */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.cat-card{background:#fff;border:1.5px solid var(--line);border-radius:var(--rl);padding:20px;transition:.2s;cursor:pointer;display:flex;flex-direction:column;gap:10px}
.cat-card:hover{border-color:var(--blue);box-shadow:var(--shadow);transform:translateY(-2px);text-decoration:none}
.cat-icon{font-size:1.75rem;line-height:1}
.cat-name{font-family:'Outfit',sans-serif;font-size:1rem;font-weight:700;color:var(--ink)}
.cat-count{font-size:.8125rem;color:var(--ink4)}

/* ── Tool Cards ── */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.tool-card{background:#fff;border:1.5px solid var(--line);border-radius:var(--r);padding:18px;display:flex;flex-direction:column;gap:8px;transition:.2s}
.tool-card:hover{border-color:var(--blue);box-shadow:var(--shadow);transform:translateY(-1px);text-decoration:none}
.tc-top{display:flex;align-items:center;gap:10px}
.tc-icon{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
.tc-name{font-family:'Outfit',sans-serif;font-size:.9375rem;font-weight:700;color:var(--ink)}
.tc-desc{font-size:.8125rem;color:var(--ink3);line-height:1.5}
.tc-tag{display:inline-flex;align-items:center;padding:2px 8px;border-radius:100px;font-size:.6875rem;font-weight:600;background:var(--bg2);color:var(--ink4)}
.tc-tag.new{background:#dcfce7;color:var(--green-d)}
.tc-tag.popular{background:#fef9c3;color:var(--amber-d)}

/* ── Calculator Page ── */
.calc-hero{padding:40px 0 0;background:linear-gradient(135deg,var(--bpal) 0%,#f0f4ff 100%)}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:.8125rem;color:var(--ink4);flex-wrap:wrap;margin-bottom:20px}
.breadcrumb a{color:var(--ink4)}
.breadcrumb a:hover{color:var(--blue);text-decoration:none}
.breadcrumb-sep{color:var(--ink4)}
.calc-hero-inner{display:flex;align-items:flex-start;gap:20px;padding-bottom:32px}
.calc-hero-badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:6px;font-size:.75rem;font-weight:700;font-family:'Outfit',sans-serif;margin-bottom:10px}
.b-blue{background:var(--bpal);color:var(--blue-d)}
.b-green{background:var(--bpg);color:var(--green-d)}
.b-amber{background:var(--bpa);color:var(--amber-d)}
.b-violet{background:var(--bpv);color:#6d28d9}
.b-rose{background:var(--bpr);color:#be123c}
.calc-hero-icon{font-size:2.25rem;flex-shrink:0;margin-top:4px}
.calc-hero-text h1{font-size:clamp(1.5rem,3.5vw,2.25rem);margin-bottom:8px}
.calc-hero-text p{font-size:1rem;color:var(--ink3);max-width:620px;margin:0}

/* ── Calculator Shell ── */
.calc-shell{background:#fff;border:1.5px solid var(--line);border-radius:var(--rl);overflow:hidden;box-shadow:var(--shadow);margin:28px 0}
.calc-top-bar{height:5px;background:linear-gradient(90deg,var(--blue),var(--violet))}
.calc-top-bar.green{background:linear-gradient(90deg,var(--green),#06b6d4)}
.calc-top-bar.amber{background:linear-gradient(90deg,var(--amber),var(--rose))}
.calc-top-bar.violet{background:linear-gradient(90deg,var(--violet),var(--rose))}
.calc-body{padding:24px}
.calc-actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:10px;font-family:'Outfit',sans-serif;font-size:.9375rem;font-weight:700;cursor:pointer;border:none;transition:.15s}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-d));color:#fff}
.btn-primary:hover{opacity:.9}
.btn-secondary{background:var(--bg2);color:var(--ink3);border:1.5px solid var(--line)}
.btn-secondary:hover{border-color:var(--blue);color:var(--blue)}
.btn-green{background:linear-gradient(135deg,var(--green),var(--green-d));color:#fff}

/* ── Form Fields ── */
.fld{display:flex;flex-direction:column;gap:5px;margin-bottom:14px}
.fld-label{font-size:.8125rem;font-weight:600;color:var(--ink);font-family:'Outfit',sans-serif}
.fld-hint{font-size:.75rem;font-weight:400;color:var(--ink4);margin-left:4px}
.fld-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:480px){.fld-row{grid-template-columns:1fr}}
.inp{width:100%;padding:10px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:.9375rem;font-family:inherit;outline:none;background:#fff;transition:.15s;color:var(--ink)}
.inp:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(59,130,246,.1)}
.sel{width:100%;padding:10px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:.875rem;font-family:inherit;outline:none;background:#fff;cursor:pointer;color:var(--ink);transition:.15s}
.sel:focus{border-color:var(--blue)}
.inp-w{position:relative;display:flex;align-items:center}
.inp-w.has-pre .inp{padding-left:32px}
.inp-w.has-suf .inp{padding-right:36px}
.inp-pre,.inp-suf{position:absolute;font-size:.875rem;color:var(--ink3);font-weight:500;pointer-events:none}
.inp-pre{left:12px}
.inp-suf{right:12px}
textarea.inp{resize:vertical;min-height:100px}
input[type=range]{width:100%;accent-color:var(--blue);height:6px}

/* ── Result Panel ── */
.r-panel{background:linear-gradient(135deg,var(--bpal),#f0f4ff);border:1.5px solid #bfdbfe;border-radius:var(--r);padding:20px;margin-top:20px;display:none}
.r-panel.show{display:block}
.r-eyebrow{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--blue);margin-bottom:6px;font-family:'Outfit',sans-serif}
.r-main{font-size:clamp(1.75rem,5vw,2.5rem);font-weight:800;font-family:'Outfit',sans-serif;color:var(--ink);line-height:1.1;margin-bottom:4px}
.r-sub{font-size:.875rem;color:var(--ink3);margin-bottom:14px}
.r-chips{display:flex;flex-wrap:wrap;gap:8px}
.r-chip{background:#fff;border:1px solid #bfdbfe;border-radius:10px;padding:8px 12px;min-width:100px;flex:1}
.r-chip-lbl{font-size:.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--ink4);margin-bottom:3px}
.r-chip-val{font-size:.9375rem;font-weight:700;font-family:'Outfit',sans-serif;color:var(--ink)}

/* ── Content ── */
.content-prose{max-width:100%}
.content-prose h2{font-size:1.375rem;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:8px}
.content-prose ul,.content-prose ol{padding-left:20px;margin:.75rem 0}
.content-prose li{margin:.375rem 0;color:var(--ink2)}
.formula-box{background:var(--bg2);border-left:4px solid var(--blue);border-radius:0 8px 8px 0;padding:16px 20px;font-family:'JetBrains Mono',monospace;font-size:.875rem;color:var(--ink);white-space:pre-wrap;margin:16px 0;line-height:1.7}
table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.875rem}
th{background:var(--bg2);padding:10px 14px;text-align:left;font-family:'Outfit',sans-serif;font-size:.8125rem;font-weight:700;color:var(--ink);border-bottom:2px solid var(--line)}
td{padding:10px 14px;border-bottom:1px solid var(--line);color:var(--ink2)}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--bg2)}
.callout{background:var(--bpal);border:1px solid #bfdbfe;border-radius:10px;padding:12px 16px;color:var(--ink2);font-size:.875rem;margin:12px 0}

/* ── FAQ ── */
.faq-section{margin:40px 0}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;background:none;border:none;text-align:left;padding:16px 0;display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer;font-family:'Outfit',sans-serif;font-size:1rem;font-weight:600;color:var(--ink)}
.faq-q:hover{color:var(--blue)}
.faq-icon{font-size:1.25rem;color:var(--ink4);flex-shrink:0;transition:transform .2s}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{display:none;padding:0 0 16px;color:var(--ink2);font-size:.9375rem;line-height:1.7}
.faq-item.open .faq-a{display:block}

/* ── Sidebar ── */
.sidebar-box{background:#fff;border:1.5px solid var(--line);border-radius:var(--r);padding:18px;margin-bottom:16px}
.sidebar-title{font-family:'Outfit',sans-serif;font-size:.9375rem;font-weight:700;color:var(--ink);margin-bottom:12px;display:flex;align-items:center;gap:6px}
.rel-link{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line);text-decoration:none}
.rel-link:last-child{border-bottom:none;padding-bottom:0}
.rel-link:hover{text-decoration:none}
.rel-link:hover .rl-name{color:var(--blue)}
.rl-icon{width:30px;height:30px;border-radius:8px;background:var(--bg2);display:flex;align-items:center;justify-content:center;font-size:.875rem;flex-shrink:0}
.rl-name{font-size:.875rem;font-weight:600;color:var(--ink)}
.rl-desc{font-size:.75rem;color:var(--ink4)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:6px}
.tag{display:inline-flex;padding:4px 10px;background:var(--bg2);border-radius:100px;font-size:.75rem;font-weight:600;color:var(--ink3);text-decoration:none;transition:.15s}
.tag:hover{background:var(--bpal);color:var(--blue)}
.pro-tip{background:linear-gradient(135deg,#fdf4ff,#f5f3ff);border:1px solid #e9d5ff;border-radius:12px;padding:14px 16px}
.pro-tip-title{font-family:'Outfit',sans-serif;font-size:.875rem;font-weight:700;color:#7c3aed;margin-bottom:6px}
.pro-tip p{font-size:.8125rem;color:#6d28d9;margin:0}

/* ── Bar Chart ── */
.bar-chart{display:flex;flex-direction:column;gap:8px;margin-top:14px}
.bar-row{display:grid;grid-template-columns:80px 1fr 45px;gap:8px;align-items:center}
.bar-row-label{font-size:.75rem;color:var(--ink3);font-weight:500;text-align:right}
.bar-track{background:var(--bg2);border-radius:100px;height:10px;overflow:hidden}
.bar-fill{height:100%;border-radius:100px;background:var(--blue);transition:width .4s ease}
.bar-pct{font-size:.75rem;font-weight:600;color:var(--ink3)}

/* ── TOC ── */
.toc{background:var(--bg2);border-radius:var(--r);padding:16px 20px;margin:24px 0}
.toc-title{font-family:'Outfit',sans-serif;font-size:.875rem;font-weight:700;color:var(--ink);margin-bottom:10px}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:5px}
.toc-list a{font-size:.875rem;color:var(--ink3)}
.toc-list a:hover{color:var(--blue)}

/* ── Tags Page ── */
.tag-page-header{background:linear-gradient(135deg,var(--bpv),var(--bpal));padding:48px 0 32px;border-bottom:1px solid var(--line)}
.tag-pill{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:100px;font-size:.8125rem;font-weight:700;background:rgba(139,92,246,.15);color:#6d28d9;margin-bottom:16px}

/* ── Article ── */
.article-hero{padding:48px 0 32px;background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%)}
.article-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:16px}
.article-meta span{font-size:.8125rem;color:var(--ink4);display:flex;align-items:center;gap:4px}
.article-body h2{margin-top:2.5rem}
.article-body h3{margin-top:1.75rem}

/* ── Footer ── */
.footer{background:var(--ink);color:#94a3b8;padding:56px 0 24px;margin-top:80px}
.footer-grid{display:grid;grid-template-columns:260px repeat(4,1fr);gap:40px;margin-bottom:48px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:500px){.footer-grid{grid-template-columns:1fr}}
.footer-brand .nav-logo{color:#fff;margin-bottom:10px}
.footer-brand p{font-size:.875rem;line-height:1.6}
.footer-col-title{font-family:'Outfit',sans-serif;font-size:.875rem;font-weight:700;color:#fff;margin-bottom:12px}
.footer-col a{display:block;font-size:.8125rem;color:#94a3b8;padding:3px 0;transition:.15s}
.footer-col a:hover{color:#fff;text-decoration:none}
.footer-bottom{border-top:1px solid #1e293b;padding-top:24px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:.8125rem}

/* ── Search Result Page ── */
.search-results-header{padding:32px 0;border-bottom:1px solid var(--line)}
.search-results-count{font-size:.875rem;color:var(--ink3);margin-top:8px}

/* ── New/Popular Badges ── */
.badge-new{display:inline-block;padding:2px 7px;background:#dcfce7;color:var(--green-d);border-radius:4px;font-size:.625rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-left:6px;vertical-align:middle}
.badge-hot{display:inline-block;padding:2px 7px;background:#fef9c3;color:var(--amber-d);border-radius:4px;font-size:.625rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-left:6px;vertical-align:middle}

/* ── Progress Steps ── */
.steps-indicator{display:flex;gap:0;margin-bottom:20px;border-radius:10px;overflow:hidden;border:1.5px solid var(--line)}
.step-seg{flex:1;padding:8px 12px;background:#fff;text-align:center;font-size:.75rem;font-weight:600;color:var(--ink3);font-family:'Outfit',sans-serif;cursor:pointer;transition:.15s;border-right:1px solid var(--line)}
.step-seg:last-child{border-right:none}
.step-seg.active{background:var(--blue);color:#fff}

/* ── Responsive ── */
@media(max-width:640px){
  .section{padding:40px 0}
  .calc-body{padding:16px}
  .r-chips{gap:6px}
  .r-chip{min-width:80px}
  table{font-size:.8125rem}
  th,td{padding:8px 10px}
}