/* VIIT Typing Master V174: fixed two-row header, responsive viewport and finger guide */
:root{--v174-header-h:146px;--lp:#ef6f91;--lr:#f4a261;--lm:#e9c46a;--li:#55b9a8;--ri:#4f91dc;--rm:#7f78d2;--rr:#b56cc5;--rp:#dc6b9d}
html{width:100%;max-width:100%;overflow-x:hidden;scroll-padding-top:calc(var(--v174-header-h) + 18px)}
body{width:100%;max-width:100%;min-height:100dvh;overflow-x:hidden}
img,svg,canvas,video{max-width:100%}

.topbar.v174-header{position:sticky;top:0;z-index:1000;width:100%;min-height:0;height:auto;padding:0;display:block;background:rgba(255,255,255,.97);border-bottom:3px solid var(--gold);box-shadow:0 8px 28px #4d07151c;backdrop-filter:blur(12px)}
.v174-header .header-brand-row{min-height:91px;display:flex;align-items:center;justify-content:center;padding:9px 20px;border-bottom:1px solid #eee2e5}
.v174-header .brand{display:flex;flex-direction:row;align-items:center;justify-content:center;gap:15px;text-align:left;color:var(--maroon);text-decoration:none;margin:0;max-width:min(100%,900px)}
.v174-header .brand img{width:72px;height:72px;flex:0 0 72px;object-fit:contain}
.v174-header .brand div{min-width:0}
.v174-header .brand b{display:block;font-size:clamp(22px,2.1vw,34px);line-height:1.05;letter-spacing:1.4px;white-space:nowrap}
.v174-header .brand small{display:block;margin-top:6px;font-size:clamp(10px,1vw,14px);line-height:1.2;letter-spacing:1.1px;color:#70525b;white-space:nowrap}
.v174-header .header-nav-row{height:52px;display:flex;align-items:center;justify-content:center;padding:0 16px;background:#fff}
.v174-header .header-nav-row nav{display:flex;align-items:center;justify-content:center;gap:4px;max-width:100%;margin:0}
.v174-header .header-nav-row nav a{display:flex;align-items:center;min-height:38px;padding:8px 15px;border-radius:9px;color:#352128;text-decoration:none;font-size:14px;font-weight:750;white-space:nowrap}
.v174-header .header-nav-row nav a:hover{background:var(--maroon-soft);color:var(--maroon)}
.v174-header .header-nav-row .nav-cta{background:var(--maroon);color:#fff}
.v174-header .header-nav-row .logout-link{color:#a31531;border:1px solid #eccbd3}
.v174-header .header-nav-row .logout-link:hover{background:#fff0f3;color:#8b0c27}

.container{width:min(100% - 32px,1500px);padding:clamp(22px,3vw,42px) 0 90px;min-width:0}
.container>*{min-width:0}.panel,.auth-card,.score-card,.test-shell,.result-page,.lesson-stage{max-width:100%}
.table-wrap{width:100%;max-width:100%;-webkit-overflow-scrolling:touch}
.hero{min-height:min(520px,calc(100dvh - var(--v174-header-h) - 80px))}
.test-shell{width:min(100%,1320px);margin-inline:auto}

.finger-guide{margin:18px 0 20px;padding:22px;border:1px solid #e7d8dd;border-radius:19px;background:linear-gradient(145deg,#fff,#fbf5f7);box-shadow:0 12px 32px #4d07150d}
.finger-guide-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:17px}
.finger-guide-head h2{margin:3px 0 2px;font-size:24px;color:var(--maroon-dark)}
.finger-guide-head p{margin:0;color:var(--muted);font-size:13px}
.level-focus{flex:0 0 auto;padding:7px 11px;border-radius:999px;background:var(--maroon);color:#fff;font-size:12px;font-weight:850}
.finger-layout{display:grid;grid-template-columns:minmax(145px,190px) minmax(510px,1fr) minmax(145px,190px);gap:16px;align-items:center}
.keyboard-guide{min-width:0;background:#352b2e;border:7px solid #514347;border-radius:15px;padding:12px;box-shadow:inset 0 2px 8px #0007,0 8px 18px #352b2e2b}
.key-row{display:grid;grid-template-columns:repeat(10,minmax(29px,1fr));gap:6px;margin-bottom:6px}
.key-row:nth-child(2){padding-inline:2.5%}.key-row:nth-child(3){padding-inline:5%}
.key{position:relative;display:grid;place-items:center;aspect-ratio:1.12/1;border-radius:7px;border:1px solid #ffffff85;border-bottom-width:4px;color:#21171a;font-size:clamp(12px,1.2vw,18px);font-weight:900;box-shadow:0 2px 3px #0005;opacity:.67}
.key.focus{opacity:1;outline:3px solid #fff;outline-offset:1px;transform:translateY(-1px)}
.key i{position:absolute;width:8px;height:2px;border-radius:5px;background:#4a3037;bottom:5px}
.lp{background:var(--lp)}.lr{background:var(--lr)}.lm{background:var(--lm)}.li{background:var(--li)}.ri{background:var(--ri)}.rm{background:var(--rm)}.rr{background:var(--rr)}.rp{background:var(--rp)}
.space-row{display:flex;justify-content:center;padding-top:2px}.thumb-key{width:54%;min-height:27px;display:grid;place-items:center;border-radius:7px;border-bottom:4px solid #a68c51;background:#f0cf78;color:#47360a;font-size:10px;font-weight:900;letter-spacing:.7px}
.hand-map{min-width:0;text-align:center}.hand-map>b{display:block;margin-bottom:9px;color:var(--maroon);font-size:12px;letter-spacing:1px}
.hand-map>div{display:grid;grid-template-columns:repeat(2,1fr);gap:7px}.finger{min-height:58px;display:grid;place-items:center;padding:7px 3px;border:1px solid #ffffffaa;border-radius:12px;color:#2d1e23;font-size:10px;font-weight:850;box-shadow:0 5px 13px #4d071515}.finger small{display:block;font-size:13px;font-weight:950}
.home-row-note{margin-top:14px;padding:10px 13px;border-radius:10px;background:#f5e8ec;color:#5d2a39;text-align:center;font-size:13px}

@media(max-width:1100px){
  :root{--v174-header-h:138px}.v174-header .header-brand-row{min-height:85px}.v174-header .brand img{width:64px;height:64px;flex-basis:64px}
  .v174-header .header-nav-row nav a{padding-inline:10px;font-size:13px}
  .finger-layout{grid-template-columns:1fr}.hand-map{display:none}.keyboard-guide{width:min(100%,760px);margin:auto}
  .course-workspace{grid-template-columns:245px minmax(0,1fr)}
}
@media(max-width:900px){
  .topbar.v174-header{display:block;min-height:0}.v174-header .header-nav-row{display:flex;height:49px;justify-content:flex-start;padding:0;overflow-x:auto;scrollbar-width:none}.v174-header .header-nav-row::-webkit-scrollbar{display:none}.v174-header .header-nav-row nav{display:flex;justify-content:flex-start;min-width:100%;padding:5px 10px}
  .v174-header .header-nav-row nav a{padding:7px 11px;min-height:36px}
  .container{width:min(100% - 24px,1500px);padding-top:22px;padding-bottom:100px}
  .course-workspace{grid-template-columns:1fr}.stats{grid-template-columns:repeat(3,minmax(0,1fr))}.admin-grid{grid-template-columns:1fr}
  .hero{min-height:auto;padding:40px 30px}.hero h1{font-size:clamp(38px,7vw,52px)}
}
@media(max-width:600px){
  :root{--v174-header-h:126px}.v174-header .header-brand-row{min-height:78px;padding:7px 10px}.v174-header .brand{gap:9px;max-width:100%}.v174-header .brand img{width:55px;height:55px;flex-basis:55px}.v174-header .brand b{font-size:clamp(17px,5.2vw,23px);letter-spacing:.5px}.v174-header .brand small{font-size:clamp(7px,2.25vw,10px);letter-spacing:.25px;margin-top:4px}
  .v174-header .header-nav-row{height:46px}.v174-header .header-nav-row nav{justify-content:center}.v174-header .header-nav-row nav a{font-size:12px;padding:6px 10px}
  .container{width:min(100% - 18px,1500px);padding-top:14px}.hero{padding:30px 20px;border-radius:20px}.hero h1{font-size:36px}.actions{flex-direction:column}.actions .btn{width:100%}
  .stats,.features,.score-grid{grid-template-columns:1fr}.stats article{padding:18px}.page-head h1{font-size:30px}.panel,.auth-card,.score-card{padding:18px}
  .finger-guide{padding:14px 9px;border-radius:14px}.finger-guide-head{display:block;padding-inline:5px}.level-focus{display:inline-block;margin-top:9px}.finger-guide-head h2{font-size:20px}.keyboard-guide{padding:7px;border-width:4px;border-radius:11px}.key-row{gap:3px;margin-bottom:3px}.key-row:nth-child(2){padding-inline:2%}.key-row:nth-child(3){padding-inline:4%}.key{border-radius:4px;border-bottom-width:3px;font-size:11px}.key.focus{outline-width:2px}.key i{width:5px;bottom:3px}.thumb-key{width:62%;min-height:22px;font-size:8px}.home-row-note{font-size:11px;text-align:left}
  .test-shell{padding:16px 10px}.test-head h1{font-size:27px}.passage{min-height:190px;padding:14px;font-size:17px}#typingInput{height:120px;padding:12px;font-size:17px}.live-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lesson-stage{padding:15px}.level-sidebar{margin-inline:0}.exercise-row{width:100%}.result-page{border-radius:16px}
}
@media(max-width:390px){.v174-header .brand b{font-size:16px}.v174-header .brand small{font-size:7px}.v174-header .brand img{width:49px;height:49px;flex-basis:49px}.v174-header .header-nav-row nav a{padding-inline:8px}.key{font-size:9px}.finger-guide{margin-inline:-3px}}
@media print{.topbar.v174-header,.finger-guide,.mobile-app-nav{display:none!important}.container{width:100%;padding:0}}