/* ==========================================================================
   ExamzPrep — design tokens & core styles
   ========================================================================== */

:root{
  /* Color */
  --ink:        #14213D;   /* deep navy — headings, nav */
  --ink-2:      #2A3654;   /* softer navy for body copy */
  --paper:      #F7F7F4;   /* page background */
  --surface:    #FFFFFF;   /* card / panel background */
  --line:       #DCDCD3;   /* hairline borders */
  --accent:     #C98A0A;   /* marigold — primary CTA / highlight */
  --accent-ink: #5C3C05;   /* text on marigold */
  --good:       #0F6E5F;   /* teal — positive / eligible / high */
  --warn:       #B4460D;   /* burnt orange — caution / low */
  --muted:      #6B7280;   /* secondary text */

  /* Type */
  --font-display: "Sora", "Segoe UI", sans-serif;
  --font-body:    "Inter", "Segoe UI", sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --radius: 4px;
  --max: 1120px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-2);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:var(--ink); text-decoration:none; }
a:hover{ text-decoration:underline; }
h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--ink);
  line-height:1.2;
  margin:0 0 .5em;
  font-weight:700;
}
h1{ font-size:clamp(1.7rem,4.4vw,2.5rem); }
h2{ font-size:clamp(1.3rem,3vw,1.7rem); }
h3{ font-size:1.15rem; }
p{ margin:0 0 1em; }
.container{ max-width:var(--max); margin:0 auto; padding:0 20px; }
.visually-hidden{ position:absolute; width:1px;height:1px; overflow:hidden; clip:rect(0 0 0 0); }
:focus-visible{ outline:3px solid var(--accent); outline-offset:2px; }

/* ---------- Skip link ---------- */
.skip-link{
  position:absolute; left:-999px; top:0; background:var(--ink); color:#fff;
  padding:10px 16px; z-index:200; border-radius:0 0 var(--radius) 0;
}
.skip-link:focus{ left:0; }

/* ---------- Header / nav ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-row{
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; padding:12px 20px; max-width:var(--max); margin:0 auto;
}
.logo{
  font-family:var(--font-display); font-weight:700; font-size:1.25rem;
  color:#fff; letter-spacing:-0.02em; white-space:nowrap;
}
.logo span{ color:var(--accent); }
.nav-toggle{
  display:none; background:none; border:1px solid rgba(255,255,255,.3);
  color:#fff; padding:8px 12px; border-radius:var(--radius); font-size:1rem;
}
.main-nav{ display:flex; align-items:center; gap:2px; flex-wrap:wrap; }
.main-nav a{
  color:rgba(255,255,255,.85); font-size:.92rem; padding:10px 12px;
  border-radius:var(--radius); white-space:nowrap;
}
.main-nav a:hover{ color:#fff; background:rgba(255,255,255,.08); text-decoration:none; }
.nav-search{
  display:flex; align-items:center; border:1px solid rgba(255,255,255,.25);
  border-radius:var(--radius); overflow:hidden; background:rgba(255,255,255,.06);
}
.nav-search input{
  border:0; background:transparent; color:#fff; padding:8px 10px; font-size:.9rem;
  width:170px; font-family:var(--font-body);
}
.nav-search input::placeholder{ color:rgba(255,255,255,.55); }
.nav-search button{
  border:0; background:var(--accent); color:var(--accent-ink); padding:8px 12px;
  font-weight:700; cursor:pointer;
}
.dropdown{ position:relative; }
.dropdown-panel{
  display:none; position:absolute; top:100%; left:0; background:var(--surface);
  border:1px solid var(--line); border-radius:var(--radius); min-width:230px;
  padding:8px; box-shadow:0 8px 24px rgba(20,33,61,.18); z-index:50;
}
.dropdown:hover .dropdown-panel, .dropdown:focus-within .dropdown-panel{ display:block; }
.dropdown-panel a{
  display:block; color:var(--ink-2); padding:9px 10px; border-radius:var(--radius); font-size:.9rem;
}
.dropdown-panel a:hover{ background:var(--paper); text-decoration:none; color:var(--ink); }

@media (max-width:900px){
  .nav-toggle{ display:inline-block; }
  .main-nav, .nav-search{
    display:none; width:100%; flex-direction:column; align-items:stretch;
  }
  .main-nav.open, .nav-search.open{ display:flex; }
  .nav-row{ flex-wrap:wrap; }
  .dropdown-panel{ position:static; box-shadow:none; border:0; padding:0 0 0 12px; }
  .nav-search input{ width:100%; }
}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(180deg,var(--ink) 0%,#1B2C52 100%);
  color:#fff; padding:56px 0 64px;
}
.hero h1{ color:#fff; max-width:16ch; }
.hero p.lead{ color:rgba(255,255,255,.82); max-width:52ch; font-size:1.05rem; }
.hero-actions{ display:flex; gap:12px; flex-wrap:wrap; margin-top:22px; }
.btn{
  display:inline-block; font-family:var(--font-body); font-weight:600; font-size:.95rem;
  padding:12px 20px; border-radius:var(--radius); border:1px solid transparent; cursor:pointer;
}
.btn-primary{ background:var(--accent); color:var(--accent-ink); }
.btn-primary:hover{ background:#B87E08; text-decoration:none; }
.btn-outline{ background:transparent; color:#fff; border-color:rgba(255,255,255,.4); }
.btn-outline:hover{ background:rgba(255,255,255,.1); text-decoration:none; }
.hero-search{ margin-top:28px; max-width:520px; display:flex; }
.hero-search input{
  flex:1; padding:13px 14px; border:1px solid rgba(255,255,255,.25); border-right:0;
  border-radius:var(--radius) 0 0 var(--radius); font-size:.95rem; background:rgba(255,255,255,.08); color:#fff;
}
.hero-search input::placeholder{ color:rgba(255,255,255,.55); }
.hero-search button{
  border:0; background:var(--accent); color:var(--accent-ink); padding:0 18px; font-weight:700;
  border-radius:0 var(--radius) var(--radius) 0; cursor:pointer;
}

/* ---------- Sections ---------- */
.section{ padding:44px 0; }
.section-head{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:18px; flex-wrap:wrap; }
.section-head a.see-all{ font-size:.9rem; font-weight:600; }
.section-alt{ background:var(--surface); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }

/* ---------- Tool cards ---------- */
.tool-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:14px; }
.tool-card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px; display:flex; flex-direction:column; gap:8px;
}
.tool-card .icon{ font-size:1.4rem; }
.tool-card h3{ font-size:1rem; margin-bottom:2px; }
.tool-card p{ color:var(--muted); font-size:.88rem; margin-bottom:6px; flex:1; }
.tool-card .use{ font-size:.86rem; font-weight:700; color:var(--good); }
.tool-card:hover{ border-color:var(--ink); }

/* ---------- Category filter bar ---------- */
.filter-bar{ display:flex; gap:8px; flex-wrap:wrap; margin-bottom:20px; }
.filter-bar button{
  background:var(--surface); border:1px solid var(--line); border-radius:999px;
  padding:8px 16px; font-size:.86rem; font-weight:600; color:var(--ink-2); cursor:pointer;
}
.filter-bar button.active{ background:var(--ink); border-color:var(--ink); color:#fff; }
#tool-search{
  width:100%; max-width:420px; padding:11px 14px; border:1px solid var(--line);
  border-radius:var(--radius); font-size:.95rem; margin-bottom:18px; font-family:var(--font-body);
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs{ font-size:.82rem; color:var(--muted); padding:14px 0 0; }
.breadcrumbs a{ color:var(--muted); }
.breadcrumbs .sep{ margin:0 6px; }

/* ---------- Tool page layout ---------- */
.tool-page-head{ padding:28px 0 8px; }
.tool-page-head .eyebrow{ color:var(--accent); font-weight:700; font-size:.82rem; }
.tool-layout{
  display:grid; grid-template-columns:1.1fr .9fr; gap:24px; align-items:start;
}
@media (max-width:800px){ .tool-layout{ grid-template-columns:1fr; } }
.panel{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:22px;
}
.panel h2{ font-size:1.05rem; margin-bottom:16px; }
.field{ margin-bottom:14px; }
.field label{ display:block; font-size:.88rem; font-weight:600; color:var(--ink); margin-bottom:5px; }
.field input, .field select{
  width:100%; padding:10px 12px; border:1px solid var(--line); border-radius:var(--radius);
  font-size:.95rem; font-family:var(--font-body); background:var(--paper);
}
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:12px; }
@media (max-width:480px){ .field-row{ grid-template-columns:1fr; } }
.calc-btn{
  background:var(--ink); color:#fff; border:0; padding:12px 22px; border-radius:var(--radius);
  font-weight:700; font-size:.95rem; cursor:pointer; width:100%; margin-top:6px;
}
.calc-btn:hover{ background:#223163; }
.result-panel{ position:sticky; top:90px; }
.result-empty{ color:var(--muted); font-size:.9rem; }
.result-grid{ display:grid; gap:10px; }
.result-row{
  display:flex; justify-content:space-between; align-items:baseline; padding:10px 0;
  border-bottom:1px solid var(--line); font-size:.92rem;
}
.result-row:last-child{ border-bottom:0; }
.result-row .val{ font-family:var(--font-mono); font-weight:700; color:var(--ink); font-size:1.05rem; }
.result-row.headline .val{ font-size:1.5rem; color:var(--good); }
.result-row.headline{ border-bottom:2px solid var(--ink); }
.badge{
  display:inline-block; padding:4px 10px; border-radius:999px; font-size:.78rem; font-weight:700;
  font-family:var(--font-mono);
}
.badge.good{ background:#E4F3EF; color:var(--good); }
.badge.warn{ background:#FBEAE1; color:var(--warn); }
.badge.neutral{ background:#EEF0F5; color:var(--ink-2); }

.note{
  background:#FDF6E6; border:1px solid #EFD79A; border-radius:var(--radius);
  padding:12px 14px; font-size:.86rem; color:var(--accent-ink); margin-top:14px;
}
.formula{
  background:var(--paper); border:1px dashed var(--line); border-radius:var(--radius);
  padding:14px; font-family:var(--font-mono); font-size:.88rem; margin:14px 0; overflow-x:auto;
}
.content h2{ margin-top:1.6em; }
.content ul{ padding-left:1.2em; }
.related{ margin-top:10px; }
.related ul{ list-style:none; margin:0; padding:0; display:grid; gap:8px; }
.related a{
  display:block; padding:10px 12px; background:var(--surface); border:1px solid var(--line);
  border-radius:var(--radius); font-size:.88rem; font-weight:600;
}
.related a:hover{ border-color:var(--ink); text-decoration:none; }

/* ---------- Category strip / about blocks ---------- */
.cat-strip{ display:grid; grid-template-columns:repeat(5,1fr); gap:12px; }
@media (max-width:800px){ .cat-strip{ grid-template-columns:repeat(2,1fr); } }
.cat-strip a{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:16px; text-align:center; font-weight:700; font-size:.88rem; color:var(--ink);
}
.cat-strip a:hover{ border-color:var(--accent); text-decoration:none; }
.cat-strip .n{ display:block; font-size:1.6rem; margin-bottom:4px; }

/* ---------- Footer ---------- */
.site-footer{ background:var(--ink); color:rgba(255,255,255,.75); margin-top:40px; padding:40px 0 20px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:28px; }
@media (max-width:800px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
.footer-grid h4{ color:#fff; font-size:.85rem; text-transform:none; margin-bottom:10px; }
.footer-grid ul{ list-style:none; margin:0; padding:0; }
.footer-grid li{ margin-bottom:8px; }
.footer-grid a{ color:rgba(255,255,255,.68); font-size:.87rem; }
.footer-grid a:hover{ color:#fff; }
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12); margin-top:30px; padding-top:16px;
  font-size:.8rem; display:flex; justify-content:space-between; gap:10px; flex-wrap:wrap;
  color:rgba(255,255,255,.55);
}
.disclaimer-strip{ font-size:.78rem; color:rgba(255,255,255,.5); max-width:70ch; margin-top:10px; }

/* ---------- Guides list ---------- */
.guide-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:14px; }
.guide-card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:18px;
}
.guide-card h3{ font-size:.98rem; }
.guide-card p{ color:var(--muted); font-size:.86rem; }

.page-hero{ padding:38px 0 30px; border-bottom:1px solid var(--line); background:var(--surface); }
.page-hero p{ color:var(--muted); max-width:60ch; }

.static-content{ max-width:76ch; }
.static-content h2{ margin-top:1.6em; }