/* Educational IT Books — shared styles (matches clickdesignsuae.com tokens) */
:root{
  --paper:#E7F1F1;--paper-2:#D8E9EA;--surface:#FFFFFF;--ink:#0E262B;--ink-soft:#476167;--ink-faint:#5E777C;
  --line:#CCE0E1;--line-strong:#AECBCD;--accent:#0F7A8C;--accent-ink:#FFFFFF;--navy:#1F3352;--gold:#C9A75E;--gold-ink:#7A5A14;
  --ok:#1E7B4A;--bad:#B42318;--shadow:0 1px 2px rgba(14,38,43,.05),0 14px 36px -18px rgba(14,38,43,.30);
  --serif:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif;--sans:"Hanken Grotesk",ui-sans-serif,system-ui,sans-serif;--mono:"JetBrains Mono",ui-monospace,monospace;
}
@media (prefers-color-scheme: dark){:root{
  --paper:#061417;--paper-2:#0A1E22;--surface:#0E262B;--ink:#E9F3F3;--ink-soft:#A0BABF;--ink-faint:#8BA5AA;
  --line:#1B363B;--line-strong:#294A50;--accent:#2AA7BC;--accent-ink:#04191D;--gold-ink:#E3C47E;--ok:#4CC38A;--bad:#FF8A7A;
  --shadow:0 1px 2px rgba(0,0,0,.45),0 18px 44px -20px rgba(0,0,0,.75);
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--serif);line-height:1.1;margin:0;letter-spacing:-.01em}

/* header */
.bar{position:sticky;top:0;z-index:20;background:var(--surface);border-bottom:1px solid var(--line)}
.bar .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:700;font-size:20px;color:var(--ink);text-decoration:none}
.brand img{width:36px;height:36px;border-radius:50%}
.crumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--ink-soft)}
.crumbs a{color:var(--ink-soft);text-decoration:none}
.crumbs a:hover{color:var(--accent)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;border-radius:999px;font:600 15px var(--sans);text-decoration:none;border:1.5px solid var(--line-strong);color:var(--ink);background:var(--surface);cursor:pointer}
.btn:hover{border-color:var(--ink)}
.btn.solid{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.solid:hover{filter:brightness(1.08)}
.btn.gold{background:var(--gold);border-color:var(--gold);color:#1B2436}
.btn.ghost{background:transparent;border-color:rgba(255,255,255,.35);color:#fff}
.btn[disabled]{opacity:.55;cursor:not-allowed}

.eyebrow{display:inline-flex;align-items:center;gap:10px;font:500 12px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint)}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--line-strong)}

/* hero */
.hero{background:var(--navy);color:#fff}
.hero .wrap{padding-top:64px;padding-bottom:64px}
.hero .eyebrow{color:#C7D3E3}.hero .eyebrow::before{background:#4A5F82}
.hero h1{font-size:clamp(38px,6vw,64px);margin-top:16px;max-width:16ch}
.hero p{color:#DCE5F0;max-width:60ch;font-size:clamp(17px,2vw,19px);margin:18px 0 0}
.rule{width:64px;height:4px;background:var(--gold);border:0;margin:24px 0 0}

/* cards / generic */
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
.section{padding-top:56px;padding-bottom:56px}
.muted{color:var(--ink-soft)}

/* text cover for books without artwork */
.tcover{aspect-ratio:600/842;background:var(--navy);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:12%;border-radius:6px;box-shadow:0 18px 36px -18px rgba(14,38,43,.55)}
.tcover small{font:500 10px var(--mono);letter-spacing:.14em;color:var(--gold);text-transform:uppercase}
.tcover strong{font-family:Georgia,serif;font-size:clamp(20px,2.6vw,28px);line-height:1.08;margin:14px 0 4px;letter-spacing:.02em;text-transform:uppercase}
.tcover strong span{display:block;color:var(--gold)}
.tcover em{font-family:Georgia,serif;font-size:13px;margin-top:auto}
.cover-img{display:block;width:100%;height:auto;aspect-ratio:600/842;object-fit:cover;border-radius:6px;box-shadow:0 18px 36px -18px rgba(14,38,43,.55)}

footer.site{background:#0E262B;color:#A0BABF;font-size:14px}
footer.site .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:28px;padding-bottom:28px}
footer.site a{color:#fff;text-decoration:none}

@media (max-width:560px){.crumbs{display:none}body{font-size:16px}}
@media print{.bar,footer.site,.no-print{display:none!important}body{background:#fff}}