:root{
  --gray-50:#f6f7f9;
  --gray-100:#eef1f4;
  --gray-200:#e2e7ec;
  --gray-300:#c9d1d9;
  --ink:#2b3440;
  --ink-soft:#5a6472;
  --blue-100:#dbe9fb;
  --blue-300:#a9c9f0;
  --blue-500:#4d7fc0;
  --blue-700:#33608f;
  --green-100:#dcf1e4;
  --green-300:#a9dcbe;
  --green-500:#4f9a6a;
  --green-700:#347650;
  --radius:14px;
  --shadow:0 2px 10px rgba(43,52,64,.06);
  --shadow-lg:0 10px 30px rgba(43,52,64,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--gray-50);
  color:var(--ink);
  line-height:1.6;
}
img{max-width:100%}
a{color:var(--blue-700)}
.container{max-width:1080px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--gray-200);position:sticky;top:0;z-index:10}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--blue-300),var(--green-300));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem}
nav.main-nav{display:flex;gap:28px}
nav.main-nav a{color:var(--ink-soft);text-decoration:none;font-weight:600;font-size:.95rem}
nav.main-nav a:hover{color:var(--blue-700)}
.nav-toggle{display:none}

/* Hero */
.hero{background:linear-gradient(180deg,var(--blue-100) 0%, var(--gray-50) 100%);padding:64px 0 56px;border-bottom:1px solid var(--gray-200)}
.hero h1{font-size:2.4rem;margin:0 0 16px;max-width:760px;line-height:1.15}
.hero p.lead{font-size:1.15rem;color:var(--ink-soft);max-width:620px;margin:0 0 28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}
.badge{background:#fff;border:1px solid var(--gray-200);border-radius:999px;padding:6px 14px;font-size:.82rem;color:var(--ink-soft);font-weight:600}

/* Hero with background photo */
.hero-media{position:relative;padding:110px 0 90px;border-bottom:none;background:var(--ink);overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center 35%}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(120deg, rgba(43,52,64,.88) 0%, rgba(43,60,80,.72) 45%, rgba(79,154,106,.35) 100%)}
.hero-content{position:relative;z-index:1}
.hero-media h1{color:#fff}
.hero-media p.lead{color:#e4e9ef}
.hero-media .badge{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.25);color:#fff;backdrop-filter:blur(2px)}
.hero-media .eyebrow{background:rgba(255,255,255,.18);color:#eafff2}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-weight:700;text-decoration:none;font-size:.95rem;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--blue-500);color:#fff}
.btn-primary:hover{background:var(--blue-700)}
.btn-secondary{background:var(--green-500);color:#fff}
.btn-secondary:hover{background:var(--green-700)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--gray-300)}
.btn-ghost:hover{border-color:var(--blue-500);color:var(--blue-700)}

/* Sections */
section{padding:56px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:28px;gap:16px;flex-wrap:wrap}
.section-head h2{margin:0;font-size:1.6rem}
.section-head p{margin:4px 0 0;color:var(--ink-soft)}
.eyebrow{display:inline-block;color:var(--green-700);background:var(--green-100);border-radius:999px;padding:4px 12px;font-size:.78rem;font-weight:800;letter-spacing:.03em;text-transform:uppercase;margin-bottom:10px}

/* Cards grid */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .15s ease, box-shadow .15s ease;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:10px}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card h3{margin:0;font-size:1.08rem;color:var(--ink)}
.card p{margin:0;color:var(--ink-soft);font-size:.92rem}
.card .tag{font-size:.72rem;font-weight:700;color:var(--blue-700);background:var(--blue-100);border-radius:999px;padding:3px 10px;align-self:flex-start}
.tool-icon{width:44px;height:44px;border-radius:12px;background:var(--green-100);display:flex;align-items:center;justify-content:center;font-size:1.3rem}

/* Cards with photo */
.card.guide-card-img{padding:0;overflow:hidden;gap:0}
.card.guide-card-img .card-media{height:150px;background-size:cover;background-position:center;background-color:var(--gray-200)}
.card.guide-card-img .card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px}

/* Article cover image */
.article-cover{display:block;width:100%;max-height:380px;object-fit:cover;border-bottom:1px solid var(--gray-200)}

/* Tool box */
.tool-panel{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:700;font-size:.88rem;color:var(--ink)}
.field input,.field select{padding:11px 12px;border:1px solid var(--gray-300);border-radius:9px;font-size:.95rem;background:var(--gray-50);color:var(--ink)}
.field input:focus,.field select:focus{outline:2px solid var(--blue-300);background:#fff}
.result-box{margin-top:22px;background:var(--green-100);border:1px solid var(--green-300);border-radius:12px;padding:20px;display:none}
.result-box.visible{display:block}
.result-box .big{font-size:2rem;font-weight:800;color:var(--green-700)}
.result-box .sub{color:var(--ink-soft);font-size:.92rem;margin-top:4px}
.quiz-option{display:block;width:100%;text-align:left;background:var(--gray-50);border:1px solid var(--gray-300);border-radius:10px;padding:14px 16px;margin-bottom:10px;cursor:pointer;font-size:.95rem;color:var(--ink)}
.quiz-option:hover{border-color:var(--blue-500);background:var(--blue-100)}
.quiz-progress{height:6px;background:var(--gray-200);border-radius:999px;overflow:hidden;margin-bottom:22px}
.quiz-progress-bar{height:100%;background:var(--green-500);width:0%;transition:width .3s ease}

/* Article */
.article-hero{background:var(--gray-100);padding:44px 0 32px;border-bottom:1px solid var(--gray-200)}
.article-hero h1{margin:0 0 12px;font-size:2rem;max-width:780px}
.breadcrumb{font-size:.85rem;color:var(--ink-soft);margin-bottom:14px}
.breadcrumb a{color:var(--ink-soft);text-decoration:none}
.tag-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.article-body{max-width:760px;margin:0 auto;padding:40px 20px}
.article-body h2{font-size:1.4rem;margin-top:2.2em}
.article-body h3{font-size:1.15rem;margin-top:1.6em}
.article-body p, .article-body li{color:#3a4351}
.article-body pre{background:var(--gray-100);border:1px solid var(--gray-200);border-radius:10px;padding:14px 16px;overflow-x:auto;font-size:.88rem}
.article-body table{display:block;overflow-x:auto;max-width:100%}
.article-body ul li{margin-bottom:6px}
.article-cta{max-width:760px;margin:0 auto 40px;background:var(--blue-100);border:1px solid var(--blue-300);border-radius:var(--radius);padding:24px;text-align:center}

/* Filters */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.filter-btn{background:#fff;border:1px solid var(--gray-300);border-radius:999px;padding:8px 16px;font-size:.85rem;font-weight:600;color:var(--ink-soft);cursor:pointer}
.filter-btn.active,.filter-btn:hover{border-color:var(--blue-500);color:var(--blue-700);background:var(--blue-100)}

/* Footer */
footer{background:#fff;border-top:1px solid var(--gray-200);padding:40px 0;margin-top:40px}
footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}
footer .cols{display:flex;gap:60px;flex-wrap:wrap}
footer h4{margin:0 0 12px;font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-soft)}
footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
footer a{color:var(--ink);text-decoration:none;font-size:.92rem}
footer a:hover{color:var(--blue-700)}
.foot-bottom{text-align:center;color:var(--ink-soft);font-size:.82rem;margin-top:30px;padding-top:20px;border-top:1px solid var(--gray-200)}

@media (max-width:860px){
  .grid-3{grid-template-columns:1fr 1fr}
  nav.main-nav{display:none}
  .site-header .container{gap:10px}
  .site-header .btn{padding:9px 12px;font-size:.85rem}
  .hero h1{font-size:1.9rem}
}
@media (max-width:600px){
  .grid-3,.grid-2{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  footer .container{flex-direction:column}
}