/* ==========================================================================
   DriveRight Institute — Traffic Signs & Rules
   Light theme, self-contained, no external dependencies.
   ========================================================================== */

:root{
  --blue:#0F52A8;
  --blue-dark:#0A3B7A;
  --blue-soft:#E9F0FB;
  --red:#D62828;
  --red-soft:#FDECEC;
  --amber:#C97A08;
  --amber-soft:#FFF6E6;
  --green:#0B6B3A;
  --green-soft:#E7F5EE;
  --ink:#14213D;
  --muted:#5A6B85;
  --bg:#F4F7FC;
  --card:#FFFFFF;
  --border:#E1E8F3;
  --shadow:0 1px 2px rgba(20,33,61,.05), 0 8px 24px rgba(20,33,61,.06);
  --shadow-lg:0 12px 40px rgba(20,33,61,.14);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1200px;
}

*{box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  margin:0;
  font-family:"Segoe UI",Roboto,-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

img,svg{display:block;max-width:100%}

a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}

h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em;font-weight:800;letter-spacing:-.015em}
h1{font-size:clamp(1.9rem,4vw,3rem)}
h2{font-size:clamp(1.4rem,2.6vw,2.1rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ------------------------------- HEADER -------------------------------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;gap:18px;height:68px;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.06rem;color:var(--ink);text-decoration:none;flex-shrink:0}
.brand:hover{text-decoration:none}
.brand-mark{width:38px;height:38px;flex-shrink:0}
.brand small{display:block;font-size:.68rem;font-weight:600;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;line-height:1}
.brand span{line-height:1.15}

.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav a{
  padding:9px 15px;border-radius:999px;font-weight:600;font-size:.92rem;color:var(--muted);
  text-decoration:none;transition:.18s;white-space:nowrap;
}
.nav a:hover{background:var(--blue-soft);color:var(--blue);text-decoration:none}
.nav a.active{background:var(--blue);color:#fff}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--border);border-radius:10px;padding:8px 11px;font-size:1.1rem;cursor:pointer;color:var(--ink)}

@media(max-width:860px){
  .nav{
    position:fixed;inset:68px 0 auto 0;background:#fff;flex-direction:column;align-items:stretch;
    padding:12px;gap:2px;border-bottom:1px solid var(--border);box-shadow:var(--shadow);
    transform:translateY(-130%);transition:transform .25s;
  }
  .nav.open{transform:translateY(0)}
  .nav a{padding:13px 16px;border-radius:10px}
  .nav-toggle{display:block}
}

/* -------------------------------- HERO --------------------------------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(140deg,#0A3B7A 0%,#0F52A8 45%,#1667C9 100%);
  color:#fff;padding:72px 0 84px;
}
.hero::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.14),transparent 68%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
@media(max-width:900px){.hero-inner{grid-template-columns:1fr;gap:32px}.hero{padding:52px 0 62px}}
.hero h1{color:#fff;margin-bottom:.4em}
.hero p.lead{font-size:1.09rem;color:rgba(255,255,255,.9);max-width:56ch;margin-bottom:1.6em}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.26);padding:6px 14px;border-radius:999px;
  font-size:.78rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;margin-bottom:20px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.hero-stats b{display:block;font-size:1.75rem;font-weight:800;line-height:1.1}
.hero-stats span{font-size:.82rem;color:rgba(255,255,255,.75);font-weight:600}
.hero-art{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;justify-items:center}
.hero-art .sign-svg{filter:drop-shadow(0 8px 20px rgba(0,0,0,.28))}

/* ------------------------------- BUTTONS -------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;font-weight:700;font-size:.95rem;
  border:1.5px solid transparent;cursor:pointer;transition:.18s;text-decoration:none;font-family:inherit;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:#fff;color:var(--blue-dark)}
.btn-primary:hover{box-shadow:0 10px 24px rgba(0,0,0,.22)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-dark)}
.btn-outline{background:#fff;color:var(--ink);border-color:var(--border)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-lg{padding:15px 30px;font-size:1.02rem}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

/* -------------------------------- CARDS -------------------------------- */
.section{padding:64px 0}
.section.tight{padding:44px 0}
.section-head{max-width:70ch;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head p{color:var(--muted);font-size:1.02rem;margin:0}

.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);
}
.card.accent{border-top:4px solid var(--blue)}
.card h3{margin-bottom:.4em}
.card p{color:var(--muted);font-size:.94rem;margin-bottom:0}

.cat-card{display:flex;flex-direction:column;gap:14px;transition:.2s}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.cat-badge{
  display:inline-block;padding:5px 13px;border-radius:999px;font-size:.72rem;font-weight:800;
  letter-spacing:.08em;text-transform:uppercase;width:fit-content;
}
.cat-mandatory .cat-badge{background:var(--red-soft);color:var(--red)}
.cat-cautionary .cat-badge{background:var(--amber-soft);color:var(--amber)}
.cat-informatory .cat-badge{background:var(--blue-soft);color:var(--blue)}
.cat-card ul{margin:0;padding-left:18px;color:var(--muted);font-size:.9rem}
.cat-card li{margin-bottom:4px}
.cat-icons{display:flex;gap:10px;flex-wrap:wrap}

/* ------------------------------ SIGN GRID ------------------------------- */
.toolbar{
  display:flex;gap:14px;flex-wrap:wrap;align-items:center;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:16px 18px;box-shadow:var(--shadow);margin-bottom:26px;position:sticky;top:68px;z-index:40;
}
.pills{display:flex;gap:8px;flex-wrap:wrap}
.pill{
  padding:8px 16px;border-radius:999px;border:1.5px solid var(--border);background:#fff;
  font-weight:700;font-size:.85rem;cursor:pointer;color:var(--muted);transition:.16s;font-family:inherit;
}
.pill:hover{border-color:var(--blue);color:var(--blue)}
.pill.active{background:var(--blue);border-color:var(--blue);color:#fff}
.pill .count{opacity:.7;font-weight:600;margin-left:5px;font-size:.78rem}
.search{
  flex:1;min-width:190px;padding:10px 16px;border-radius:999px;border:1.5px solid var(--border);
  font-size:.92rem;font-family:inherit;color:var(--ink);background:#fff;outline:none;
}
.search:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.result-count{font-size:.85rem;color:var(--muted);font-weight:600;margin-bottom:16px}

.sign-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:16px}
.sign-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:16px 12px 14px;text-align:center;cursor:pointer;transition:.18s;
  display:flex;flex-direction:column;align-items:center;gap:10px;
}
.sign-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfdcf0}
.sign-card .sign-svg{height:86px;width:86px}
.sign-card .sname{font-size:.83rem;font-weight:700;line-height:1.3;color:var(--ink)}
.sign-card .stag{font-size:.66rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase}
.tag-mandatory{color:var(--red)}
.tag-cautionary{color:var(--amber)}
.tag-informatory{color:var(--blue)}
.empty{padding:60px 20px;text-align:center;color:var(--muted)}

/* -------------------------------- MODAL -------------------------------- */
.modal-back{
  position:fixed;inset:0;background:rgba(11,24,45,.6);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;backdrop-filter:blur(3px);
}
.modal-back.open{display:flex}
.modal{
  background:#fff;border-radius:20px;max-width:620px;width:100%;max-height:88vh;overflow:auto;
  box-shadow:var(--shadow-lg);animation:pop .2s ease-out;
}
@keyframes pop{from{opacity:0;transform:scale(.96) translateY(8px)}to{opacity:1;transform:none}}
.modal-head{display:flex;gap:22px;padding:26px 26px 20px;align-items:center;border-bottom:1px solid var(--border)}
.modal-head .sign-svg{height:120px;width:120px;flex-shrink:0}
.modal-head h3{margin:0 0 6px;font-size:1.35rem}
.modal-body{padding:22px 26px 26px}
.modal-close{
  position:absolute;top:14px;right:16px;background:var(--bg);border:none;border-radius:50%;
  width:34px;height:34px;font-size:1.2rem;cursor:pointer;color:var(--muted);line-height:1;
}
.modal-close:hover{background:#e6ecf7;color:var(--ink)}
.modal-wrap{position:relative;display:inline-block;width:100%;max-width:620px}
.field{margin-bottom:18px}
.field:last-child{margin-bottom:0}
.field .lbl{font-size:.7rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.field .val{font-size:.97rem}
.callout{
  border-left:4px solid var(--blue);background:var(--blue-soft);padding:13px 16px;
  border-radius:0 10px 10px 0;font-size:.9rem;color:#123a6e;
}
.callout.warn{border-color:var(--red);background:var(--red-soft);color:#8f1c1c}
.callout.tip{border-color:var(--green);background:var(--green-soft);color:#0a5530}

/* -------------------------------- RULES -------------------------------- */
.rule-block{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);margin-bottom:20px}
.rule-block h3{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.rule-ico{
  width:40px;height:40px;border-radius:11px;background:var(--blue-soft);color:var(--blue);
  display:grid;place-items:center;font-size:1.15rem;flex-shrink:0;font-weight:800;
}
.rule-block ul{margin:0;padding-left:0;list-style:none}
.rule-block li{position:relative;padding-left:28px;margin-bottom:11px;font-size:.95rem;color:#31415c}
.rule-block li::before{
  content:"";position:absolute;left:6px;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--blue);
}
.rule-block li:last-child{margin-bottom:0}

table{width:100%;border-collapse:collapse;font-size:.9rem;background:#fff;border-radius:var(--radius);overflow:hidden}
thead th{
  background:var(--blue);color:#fff;text-align:left;padding:12px 14px;font-size:.78rem;
  letter-spacing:.06em;text-transform:uppercase;font-weight:800;
}
tbody td{padding:11px 14px;border-bottom:1px solid var(--border);vertical-align:top}
tbody tr:nth-child(even){background:#fafcff}
tbody tr:last-child td{border-bottom:none}
td.sec{font-weight:800;color:var(--blue);white-space:nowrap}
td.money{font-weight:700;color:var(--red)}
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow)}
.table-scroll table{border-radius:0;min-width:640px}

.mark-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.mark-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow)}
.mark-card svg{width:100%;height:auto;display:block}
.mark-card .mb{padding:14px 16px 16px}
.mark-card h4{margin:0 0 6px;font-size:.95rem}
.mark-card p{font-size:.85rem;color:var(--muted);margin:0 0 8px}
.mark-card .note{font-size:.78rem;color:var(--blue);background:var(--blue-soft);padding:8px 10px;border-radius:8px;margin:0}

.signal-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px}
.signal-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px;box-shadow:var(--shadow)}
.lamp{width:52px;height:52px;border-radius:50%;margin-bottom:12px;box-shadow:inset 0 -3px 8px rgba(0,0,0,.2)}
.signal-card h4{margin:0 0 6px;font-size:.95rem}
.signal-card p{font-size:.85rem;color:var(--muted);margin:0 0 8px}
.signal-card .note{font-size:.78rem;color:var(--blue);background:var(--blue-soft);padding:8px 10px;border-radius:8px;margin:0}

.hand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:18px}
.hand-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px;text-align:center;box-shadow:var(--shadow)}
.hand-svg{height:92px;width:auto;margin:0 auto 10px}
.hand-card h4{margin:0 0 6px;font-size:.9rem}
.hand-card p{font-size:.82rem;color:var(--muted);margin:0 0 8px}
.hand-card .note{font-size:.76rem;color:var(--blue);background:var(--blue-soft);padding:7px 9px;border-radius:8px;margin:0;text-align:left}

.facts{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.fact{background:#fff;border:1px solid var(--border);border-left:4px solid var(--red);border-radius:var(--radius-sm);padding:14px 16px}
.fact b{display:block;font-size:.72rem;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-bottom:3px}
.fact span{font-weight:700;font-size:.92rem}

.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.tab{
  padding:10px 20px;border-radius:999px;border:1.5px solid var(--border);background:#fff;
  font-weight:700;font-size:.88rem;cursor:pointer;color:var(--muted);font-family:inherit;transition:.16s;
}
.tab.active{background:var(--blue);border-color:var(--blue);color:#fff}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* -------------------------------- QUIZ --------------------------------- */
.quiz-shell{max-width:840px;margin:0 auto}
.quiz-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}
.setup-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:20px}
@media(max-width:640px){.setup-row{grid-template-columns:1fr}}
label.sel{display:block;font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:7px}
select,input[type=text]{
  width:100%;padding:12px 15px;border-radius:var(--radius-sm);border:1.5px solid var(--border);
  font-size:.95rem;font-family:inherit;color:var(--ink);background:#fff;outline:none;
}
select:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}

.quiz-top{display:flex;align-items:center;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.quiz-top .meta{font-size:.83rem;font-weight:700;color:var(--muted)}
.progress{flex:1;height:9px;background:#e8eef8;border-radius:999px;overflow:hidden;min-width:140px}
.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),#1667C9);border-radius:999px;transition:width .3s}
.timer{font-variant-numeric:tabular-nums;font-weight:800;color:var(--ink);font-size:.92rem}

.q-text{font-size:1.18rem;font-weight:700;margin:0 0 20px;line-height:1.45}
.q-sign{display:flex;justify-content:center;margin:0 0 20px}
.q-sign .sign-svg{height:150px;width:150px;filter:drop-shadow(0 6px 16px rgba(20,33,61,.16))}

.opts{display:grid;gap:11px}
.opt{
  display:flex;align-items:center;gap:14px;padding:14px 17px;border-radius:12px;
  border:1.5px solid var(--border);background:#fff;cursor:pointer;text-align:left;
  font-family:inherit;font-size:.96rem;font-weight:600;color:var(--ink);transition:.15s;width:100%;
}
.opt:hover:not(:disabled){border-color:var(--blue);background:var(--blue-soft)}
.opt .key{
  width:28px;height:28px;border-radius:8px;background:var(--bg);display:grid;place-items:center;
  font-weight:800;font-size:.82rem;color:var(--muted);flex-shrink:0;
}
.opt .opt-sign{height:64px;width:64px;flex-shrink:0}
.opt.correct{border-color:#1E9E4A;background:var(--green-soft)}
.opt.correct .key{background:#1E9E4A;color:#fff}
.opt.wrong{border-color:var(--red);background:var(--red-soft)}
.opt.wrong .key{background:var(--red);color:#fff}
.opt:disabled{cursor:default}
.opt.picked{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}

.explain{margin-top:18px;padding:15px 18px;border-radius:12px;font-size:.92rem;display:none}
.explain.show{display:block}
.explain.ok{background:var(--green-soft);border-left:4px solid #1E9E4A;color:#0a5530}
.explain.no{background:var(--red-soft);border-left:4px solid var(--red);color:#8f1c1c}
.explain b{display:block;margin-bottom:3px}

.quiz-foot{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:24px;flex-wrap:wrap}

.score-ring{width:180px;height:180px;margin:0 auto 18px;position:relative}
.score-ring svg{transform:rotate(-90deg)}
.score-ring .num{
  position:absolute;inset:0;display:grid;place-items:center;flex-direction:column;text-align:center;
}
.score-ring .num b{font-size:2.4rem;font-weight:800;line-height:1;display:block}
.score-ring .num span{font-size:.8rem;color:var(--muted);font-weight:700}

.result-head{text-align:center;margin-bottom:26px}
.grade{
  display:inline-block;padding:7px 20px;border-radius:999px;font-weight:800;font-size:.82rem;
  letter-spacing:.08em;text-transform:uppercase;
}
.grade.pass{background:var(--green-soft);color:var(--green)}
.grade.fail{background:var(--red-soft);color:var(--red)}

.review-item{border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:12px;background:#fff}
.review-item.right{border-left:4px solid #1E9E4A}
.review-item.bad{border-left:4px solid var(--red)}
.review-item .rq{font-weight:700;font-size:.95rem;margin-bottom:9px}
.review-item .ra{font-size:.87rem;color:var(--muted);margin-bottom:5px}
.review-item .ra b{color:var(--ink)}
.review-item .rx{font-size:.85rem;color:#31415c;background:var(--bg);padding:10px 12px;border-radius:8px;margin-top:8px}
.review-item .sign-svg{height:56px;width:56px;float:right;margin:0 0 8px 12px}

/* ------------------------- BACK TO HOME (pill) -------------------------- */
/* Route back to the Agswamy portal. Same fixed bottom-left pill the other tool
   pages use, tinted white for this page's light surfaces. */
.home-link{
  position:fixed;left:20px;bottom:16px;z-index:65;
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 15px;border-radius:999px;
  border:1px solid var(--border);
  background:#fff;color:var(--ink);
  font-size:.87rem;font-weight:700;text-decoration:none;
  box-shadow:0 8px 22px rgba(20,33,61,.18);
}
.home-link:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue);text-decoration:none}
@media(max-width:520px){.home-link{left:14px;bottom:12px;padding:9px 13px;font-size:.82rem}}

/* ------------------------------- FOOTER -------------------------------- */
.site-footer{background:#0A1F3C;color:#c6d3e8;padding:52px 0 26px;margin-top:40px;font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:34px}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr;gap:26px}}
.site-footer h4{color:#fff;font-size:.82rem;letter-spacing:.09em;text-transform:uppercase;margin-bottom:14px}
.site-footer a{color:#c6d3e8;display:block;padding:4px 0}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.13);padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.82rem;color:#8fa3c0}

.disclaimer{
  background:var(--amber-soft);border:1px solid #f2dcb4;border-radius:var(--radius-sm);
  padding:14px 18px;font-size:.85rem;color:#7a4d06;margin-top:26px;
}
.disclaimer b{color:#5c3a04}

.breadcrumb{font-size:.85rem;color:var(--muted);padding:22px 0 0}
.breadcrumb a{color:var(--muted)}

.page-head{background:linear-gradient(135deg,#0A3B7A,#0F52A8);color:#fff;padding:44px 0 50px}
.page-head h1{color:#fff;margin-bottom:.25em}
.page-head p{color:rgba(255,255,255,.85);max-width:70ch;margin:0}

.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}