/* resguide.sg — layout: wide editorial bands, tools as bordered "worksheets" on a paper ground */
:root{
  --paper:#f2f5f1; --surface:#ffffff; --sunk:#e7ede8;
  --ink:#11211f; --muted:#52635f; --line:#cfd9d3;
  --deed:#0b5d4e; --deed-strong:#084438; --on-deed:#f4fbf7;
  --marker:#e39b0c; --marker-soft:#fbeccb; --on-marker:#2a1c00;
  --good:#1c7c4a; --bad:#b3372b;
  --display:"Bricolage Grotesque","Avenir Next","Segoe UI",system-ui,sans-serif;
  --body:"Public Sans","Segoe UI",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --r:14px; --r-sm:8px; --wrap:1120px;
  --shadow:0 1px 2px rgba(17,33,31,.06),0 8px 24px rgba(17,33,31,.06);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0d1614; --surface:#14211e; --sunk:#0a1210; --ink:#e8f0ec; --muted:#9db0aa; --line:#27403a;
  --deed:#3fbf9f; --deed-strong:#6fd8bc; --on-deed:#04201a; --marker:#f2b33a; --marker-soft:#3a2c0a; --on-marker:#231700;
  --good:#5fd08f; --bad:#ff8a7c; --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.3); color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0d1614; --surface:#14211e; --sunk:#0a1210; --ink:#e8f0ec; --muted:#9db0aa; --line:#27403a;
  --deed:#3fbf9f; --deed-strong:#6fd8bc; --on-deed:#04201a; --marker:#f2b33a; --marker-soft:#3a2c0a; --on-marker:#231700;
  --good:#5fd08f; --bad:#ff8a7c; --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.3); color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1.0625rem/1.6 var(--body)}
img,video{max-width:100%;display:block}
a{color:var(--deed);text-underline-offset:3px}
a:hover{color:var(--deed-strong)}
h1,h2,h3{font-family:var(--display);line-height:1.1;margin:0;text-wrap:balance;letter-spacing:-.02em}
h1{font-size:clamp(2.4rem,6vw,4.4rem);font-weight:700}
h2{font-size:clamp(1.7rem,3.6vw,2.6rem);font-weight:700}
h3{font-size:1.25rem;font-weight:600;letter-spacing:-.01em}
p{margin:0}
:focus-visible{outline:3px solid var(--marker);outline-offset:2px;border-radius:4px}
[hidden]{display:none!important}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:max(18px,env(safe-area-inset-left,0px)) max(18px,env(safe-area-inset-right,0px))}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:99;background:var(--surface);padding:8px 12px}
.eyebrow{font:600 .78rem/1 var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--deed)}
.lede{font-size:1.2rem;color:var(--muted);max-width:60ch}
.muted{color:var(--muted)} .small{font-size:.9rem} .num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.stack{display:flex;flex-direction:column;gap:var(--gap,16px)}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* header */
.site-head{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:700 1.2rem var(--display);letter-spacing:-.02em}
.brand img{width:34px;height:34px}
.brand span b{color:var(--deed);font-weight:700}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{padding:8px 12px;border-radius:999px;text-decoration:none;color:var(--ink);font-weight:500;font-size:.97rem}
.nav a:hover{background:var(--sunk)}
.nav a[aria-current="page"]{background:var(--deed);color:var(--on-deed)}
.icon-btn{width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;display:grid;place-items:center;font-size:1.05rem}
.menu-btn{display:none}
@media (max-width:820px){
  .menu-btn{display:grid;margin-left:auto}
  .nav{position:absolute;left:0;right:0;top:100%;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 18px 16px;margin:0;display:none}
  .nav.open{display:flex}
  .nav a{border-radius:var(--r-sm)}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:999px;border:1px solid transparent;font:600 1rem var(--body);cursor:pointer;text-decoration:none;transition:transform .12s,background .12s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--deed);color:var(--on-deed)} .btn-primary:hover{background:var(--deed-strong);color:var(--on-deed)}
.btn-marker{background:var(--marker);color:var(--on-marker)} .btn-marker:hover{color:var(--on-marker);filter:brightness(1.06)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)} .btn-ghost:hover{background:var(--sunk);color:var(--ink)}
.btn-sm{padding:7px 14px;font-size:.9rem}

/* sections */
.band{padding-block:clamp(48px,8vw,96px)}
.band-sunk{background:var(--sunk);border-block:1px solid var(--line)}
.band-deed{background:var(--deed-strong);color:#f4fbf7}
:root[data-theme="dark"] .band-deed{background:#0f2a25}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .band-deed{background:#0f2a25}}
.band-deed h2,.band-deed h3{color:#fff}.band-deed .muted,.band-deed .lede{color:#bfd8cf}.band-deed .eyebrow{color:#f2b33a}.band-deed a{color:#fff}
.sec-head{display:flex;flex-direction:column;gap:12px;margin-bottom:36px;max-width:720px}

/* hero */
.hero{padding-block:clamp(40px,7vw,88px) clamp(40px,6vw,72px)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(24px,5vw,64px);align-items:center}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 62%,var(--marker) 62% 92%,transparent 92%)}
.hero .stack{--gap:22px}
.hero-facts{display:flex;flex-wrap:wrap;gap:8px 22px;padding:0;margin:0;list-style:none;font-size:.95rem;color:var(--muted)}
.hero-facts b{color:var(--ink);font-family:var(--mono)}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr}}

/* media slots */
.media-slot{position:relative;margin:0;border-radius:var(--r);overflow:hidden;background:var(--sunk);aspect-ratio:var(--ar,4/3);max-width:100%;border:1px solid var(--line)}
.media-slot img,.media-slot video{width:100%;height:100%;object-fit:cover}
.media-slot .ph{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:8px;text-align:center;padding:20px;color:var(--muted);
  background:repeating-linear-gradient(135deg,transparent 0 14px,color-mix(in srgb,var(--line) 55%,transparent) 14px 15px)}
.media-slot .ph code{font:600 .85rem var(--mono);background:var(--surface);padding:4px 10px;border-radius:6px;border:1px solid var(--line);color:var(--ink)}
.media-slot .ph span{font-size:.85rem}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:720px){.gallery{grid-template-columns:1fr}}

/* cards / grids */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px;display:flex;flex-direction:column;gap:10px;min-width:0}
a.card{text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s,border-color .15s}
a.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--deed);color:inherit}
.card .glyph{width:44px;height:44px;border-radius:12px;background:var(--marker-soft);color:var(--deed);display:grid;place-items:center}
.card .glyph svg{width:24px;height:24px}
.card .go{margin-top:auto;padding-top:8px;font-weight:600;color:var(--deed)}

/* roadmap */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;counter-reset:s}
.steps li{counter-increment:s;border-top:3px solid #f2b33a;padding-top:14px;display:flex;flex-direction:column;gap:6px}
.steps li::before{content:"Step " counter(s);font:600 .78rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:#f2b33a}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* worksheet (tool panel) */
.sheet{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;min-width:0}
.sheet-head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}
.sheet-body{padding:22px;display:flex;flex-direction:column;gap:18px}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}
label.f{display:flex;flex-direction:column;gap:6px;font-size:.88rem;font-weight:600;color:var(--muted)}
input,select,textarea{font:500 1rem var(--body);color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:var(--r-sm);padding:10px 12px;width:100%;min-width:0}
input[type=number],input[type=date]{font-family:var(--mono)}
input[type=checkbox]{width:20px;height:20px;accent-color:var(--deed);flex:none;padding:0}
.result{background:var(--sunk);border-radius:var(--r-sm);padding:16px 18px;display:flex;flex-direction:column;gap:8px}
.result .big{font:700 clamp(1.6rem,4vw,2.2rem) var(--mono);font-variant-numeric:tabular-nums;color:var(--deed)}
.kv{display:flex;justify-content:space-between;gap:16px;font-size:.95rem;border-bottom:1px dashed var(--line);padding-bottom:6px}
.kv:last-child{border:0;padding:0}.kv span:last-child{font-family:var(--mono);font-variant-numeric:tabular-nums;text-align:right}
.note{font-size:.88rem;color:var(--muted);border-left:3px solid var(--marker);padding:2px 0 2px 12px}
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;font:600 .78rem var(--mono);background:var(--marker-soft);color:var(--ink)}
.pill.ok{background:color-mix(in srgb,var(--good) 18%,transparent);color:var(--good)}
.pill.no{background:color-mix(in srgb,var(--bad) 18%,transparent);color:var(--bad)}
.tabs{display:flex;flex-wrap:wrap;gap:6px}
.tabs button{padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:600 .92rem var(--body);cursor:pointer}
.tabs button[aria-selected="true"]{background:var(--deed);border-color:var(--deed);color:var(--on-deed)}

/* progress */
.bar{height:10px;border-radius:999px;background:var(--sunk);overflow:hidden;border:1px solid var(--line)}
.bar i{display:block;height:100%;background:var(--deed);width:0;transition:width .3s}
.cu{border:1px solid var(--line);border-radius:var(--r);background:var(--surface);overflow:hidden}
.cu summary{cursor:pointer;list-style:none;padding:18px 22px;display:grid;grid-template-columns:1fr auto;gap:8px 16px;align-items:center}
.cu summary::-webkit-details-marker{display:none}
.cu summary .bar{grid-column:1/-1}
.cu ul{list-style:none;margin:0;padding:0 12px 12px}
.cu li label{display:flex;gap:12px;align-items:center;padding:10px;border-radius:var(--r-sm);cursor:pointer}
.cu li label:hover{background:var(--sunk)}
.cu li .code{font:600 .82rem var(--mono);color:var(--muted);min-width:3.2ch}
.cu li input:checked ~ .t{text-decoration:line-through;color:var(--muted)}

/* flashcards */
.flash{perspective:1200px;min-height:260px;cursor:pointer;border:0;background:none;padding:0;width:100%;font:inherit;color:inherit}
.flash-in{position:relative;min-height:260px;transition:transform .45s;transform-style:preserve-3d}
.flash.flip .flash-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--r);border:1px solid var(--line);display:grid;place-content:center;gap:12px;text-align:center;padding:28px;background:var(--surface)}
.face.back{transform:rotateY(180deg);background:var(--deed-strong);color:#f4fbf7;border-color:transparent}
:root[data-theme="dark"] .face.back{background:#0f2a25}
.face .term{font:700 clamp(1.8rem,5vw,2.8rem) var(--display)}
@media (prefers-reduced-motion:reduce){.flash-in,.btn,a.card,.bar i{transition:none}html{scroll-behavior:auto}}

/* faq + footer */
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font:600 1.1rem var(--display);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--deed)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:10px;color:var(--muted);max-width:68ch}
.site-foot{border-top:1px solid var(--line);padding-block:40px;font-size:.93rem;color:var(--muted)}
.site-foot .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.site-foot h3{font-size:.8rem;font-family:var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--ink);margin-bottom:10px}
.site-foot ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.site-foot .legal{grid-column:1/-1;border-top:1px solid var(--line);padding-top:18px;font-size:.84rem}
@media (max-width:720px){.site-foot .wrap{grid-template-columns:1fr}}
.page-head{padding-block:clamp(36px,6vw,64px) 28px}
.page-head .stack{--gap:14px}
.toast{position:fixed;left:50%;bottom:max(20px,env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 18px;border-radius:999px;font-weight:600;font-size:.92rem;z-index:50}
.plan-week{display:grid;grid-template-columns:110px 1fr;gap:6px 18px;padding:14px 0;border-bottom:1px dashed var(--line)}
.plan-week:last-child{border:0}
.plan-week ul{margin:0;padding-left:18px}
@media (max-width:520px){.plan-week{grid-template-columns:1fr}}
.result>.pill{align-self:flex-start}