/* ===== ML Academy brand layer =====
   Layout: navy masthead hero + white working cards; orange is the single spark (CTA, club items, sparkle). */
:root{
  --fh:"Montserrat","Segoe UI",system-ui,sans-serif;
  --fb:"Manrope","Segoe UI",system-ui,-apple-system,sans-serif;
  --logo-navy:#0E3460; --brand-orange:#FE5D3C; --on-accent:#ffffff;
  --bg:#f5f7fb; --grid:rgba(14,52,96,.045); --surface:#ffffff; --surface2:#edf1f7;
  --ink:#0f2440; --muted:#56677d; --line:#dbe2ec; --accent:#0E3460; --accent-soft:#e3eaf5;
  --amber:#c4401a; --amber-bg:#fff0ea; --good:#1f7247; --good-bg:#e3f4ea; --bad:#b9343a; --bad-bg:#fbe9e9;
  --hero-a:#1d4f8c; --hero-b:#0E3460; --hero-c:#09264a;
  --shadow:0 1px 2px rgba(14,52,96,.06),0 6px 18px rgba(14,52,96,.07);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --logo-navy:#e9eef6; --on-accent:#0b1626;
  --bg:#0b1626; --grid:rgba(143,179,236,.04); --surface:#112136; --surface2:#182c46;
  --ink:#e9eef6; --muted:#9aacc2; --line:#243a56; --accent:#9cbcf0; --accent-soft:#1b3352;
  --amber:#ff8c69; --amber-bg:#3a2119; --good:#5cc08c; --good-bg:#16352a; --bad:#ec8080; --bad-bg:#3b2025;
  --hero-a:#1a4479; --hero-b:#0f2d55; --hero-c:#081d38;
  --shadow:0 1px 2px rgba(0,0,0,.35),0 8px 22px rgba(0,0,0,.3);
  color-scheme:dark;
}}
:root[data-theme="dark"]{
  --logo-navy:#e9eef6; --on-accent:#0b1626;
  --bg:#0b1626; --grid:rgba(143,179,236,.04); --surface:#112136; --surface2:#182c46;
  --ink:#e9eef6; --muted:#9aacc2; --line:#243a56; --accent:#9cbcf0; --accent-soft:#1b3352;
  --amber:#ff8c69; --amber-bg:#3a2119; --good:#5cc08c; --good-bg:#16352a; --bad:#ec8080; --bad-bg:#3b2025;
  --hero-a:#1a4479; --hero-b:#0f2d55; --hero-c:#081d38;
  --shadow:0 1px 2px rgba(0,0,0,.35),0 8px 22px rgba(0,0,0,.3);
  color-scheme:dark;
}
:root[data-theme="light"]{
  --logo-navy:#0E3460; --on-accent:#ffffff;
  --bg:#f5f7fb; --grid:rgba(14,52,96,.045); --surface:#ffffff; --surface2:#edf1f7;
  --ink:#0f2440; --muted:#56677d; --line:#dbe2ec; --accent:#0E3460; --accent-soft:#e3eaf5;
  --amber:#c4401a; --amber-bg:#fff0ea; --good:#1f7247; --good-bg:#e3f4ea; --bad:#b9343a; --bad-bg:#fbe9e9;
  --hero-a:#1d4f8c; --hero-b:#0E3460; --hero-c:#09264a;
  --shadow:0 1px 2px rgba(14,52,96,.06),0 6px 18px rgba(14,52,96,.07);
}
body{background-color:var(--bg);color:var(--ink);font-family:var(--fb)}
h1,h2,h3{font-family:var(--fh);font-weight:800;letter-spacing:-.01em}
.lbl{font-family:var(--fh);letter-spacing:.08em}
input[type=text],input[type=number],textarea,select{font:inherit;color:var(--ink);background:var(--surface);border:1.5px solid var(--line);border-radius:10px;padding:9px 12px;max-width:100%}
textarea{resize:vertical}
input[type=number]{padding:7px 8px}

/* top bar */
.topbar{top:env(safe-area-inset-top,0px);background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(8px);box-shadow:0 1px 0 var(--line)}
.topbar .brand{padding:2px 4px;gap:10px!important}
.logo-mark{width:38px;height:38px;display:inline-flex;flex:0 0 auto}
.logo-mark svg{width:100%;height:100%}
.wordmark{display:flex;flex-direction:column;align-items:flex-start;line-height:1}
.wm-name{font-family:var(--fh);font-weight:800;font-size:19px;color:var(--logo-navy);letter-spacing:-.01em}
.wm-sub{font-family:var(--fh);font-weight:700;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);margin-top:4px}
.nav-link{font-family:var(--fh);font-size:14px}
.nav-link.on{color:var(--accent);background:var(--accent-soft)}
.pill,.user-pill,.bell{border-radius:12px}
.avatar{background:linear-gradient(160deg,#ff7a57,#FE5D3C);color:#fff}
.pts-chip{font-family:var(--fh)}

/* buttons */
.btn{background:var(--accent);color:var(--on-accent);border-radius:11px;font-family:var(--fh);font-weight:700;letter-spacing:.01em}
.btn.ghost{background:var(--surface);color:var(--ink);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent)}
.btn.warn{background:var(--bad-bg);color:var(--bad)}
.grade-tabs button{font-family:var(--fh)}
.grade-tabs button.on{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.grade-tabs button.on::after{background:var(--brand-orange)}
.jam-num.jam-p,.magic-cell.jam-p{color:var(--on-accent)}

/* hero */
.hero{background:radial-gradient(120% 140% at 88% 0%,var(--hero-a) 0%,var(--hero-b) 48%,var(--hero-c) 100%);box-shadow:0 18px 44px rgba(14,52,96,.28);border-radius:24px}
.hero h1{font-family:var(--fh);font-weight:800;letter-spacing:-.02em}
.eyebrow{display:inline-block;font-family:var(--fh);font-weight:800;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:#ff9a7c;margin-bottom:12px}
.hero .sub .kb{color:#a9c7ff}
.hero .sub .kg{color:#ffad93}
.cta{background:linear-gradient(180deg,#ff7957,#FE5D3C 55%,#ec4a27);box-shadow:0 10px 24px rgba(254,93,60,.42);font-family:var(--fh);color:#fff}
.hero-card{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.16)}
.hero-card .pbar.gold>div{background:#FE5D3C}
.hero-card .hc-prog{font-family:var(--fh)}

/* club strip */
.club-strip{margin-top:18px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.4fr);gap:18px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:20px 22px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.club-strip::before{content:'';position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--brand-orange)}
.club-strip h2{font-size:22px;margin:4px 0 6px}
.club-strip p{margin:0;color:var(--muted);font-size:14.5px}
.cs-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.cs-btn{display:flex;align-items:center;gap:10px;text-align:left;background:var(--surface2);border:1.5px solid transparent;border-radius:12px;padding:10px 12px;color:var(--ink);font:inherit;font-weight:600;font-size:14px;cursor:pointer;min-width:0}
.cs-btn b{font-family:var(--fh);font-weight:800;font-size:18px;color:var(--amber);min-width:28px;text-align:center}
.cs-btn:hover{border-color:var(--brand-orange)}
@media (max-width:720px){.club-strip{grid-template-columns:1fr}}
@media (max-width:420px){.cs-links{grid-template-columns:1fr}}

/* cards */
.card{border-radius:16px}
.card-cat.club{color:var(--amber)}
.card-ttl{font-family:var(--fh);font-weight:800;font-size:19px}
.card-arrow{color:var(--accent)}
.sheet-card:hover .card-arrow{background:var(--brand-orange);border-color:var(--brand-orange);color:#fff}
.pbar>div{background:var(--accent)}
.pbar.gold>div{background:var(--brand-orange)}
.badge.clubb{background:var(--amber-bg);color:var(--amber)}
.tech b{color:var(--accent)}
.figure{background:#fbfcfe;max-width:100%}
.pnum{font-family:var(--fh);font-weight:800}
.stars{color:var(--brand-orange)}
.sol-box .lbl,.hint-box .lbl{font-family:var(--fh)}

/* segmented controls (games) */
.seg{display:flex;flex-wrap:wrap;gap:4px;background:var(--surface2);padding:4px;border-radius:12px;width:fit-content;max-width:100%}
.seg button{background:none;color:var(--muted);font-family:var(--fh);font-weight:700;font-size:13px;padding:7px 12px;border-radius:9px}
.seg button.on{background:var(--surface);color:var(--accent);box-shadow:var(--shadow)}
.tabs2{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1.5px solid var(--line)}
.tabs2 button{background:none;color:var(--muted);font-family:var(--fh);font-weight:700;padding:10px 14px;border-radius:10px 10px 0 0;border-bottom:3px solid transparent;margin-bottom:-1.5px}
.tabs2 button.on{color:var(--ink);border-bottom-color:var(--brand-orange)}

/* bulls & cows */
.bc-table{border-collapse:collapse;margin-top:14px;font-size:16px}
.bc-table th{font-family:var(--fh);font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);text-align:left;padding:3px 12px}
.bc-table td{padding:5px 12px;border-top:1px solid var(--line)}
.pad{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.pad button{width:38px;height:38px;border-radius:9px;background:var(--surface);border:1.5px solid var(--line);color:var(--ink);font-family:var(--fh);font-weight:800;font-size:17px}
.pad button.x{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--bad);text-decoration-thickness:2px;background:var(--surface2);opacity:.7}

/* schulte */
.sch-head{display:flex;flex-wrap:wrap;gap:10px 26px;margin:14px 0 12px}
.sch-head>div{min-width:72px}
.sch-target{font-family:var(--fh);font-weight:800;font-size:28px;color:var(--ink);line-height:1.1}
.sch-target.red,.sch-cell.red{color:var(--bad)}
.sch-time{font-family:var(--fh);font-weight:800;font-size:20px;color:var(--accent);line-height:1.4}
.sch-wrap{overflow-x:auto}
.sch-grid{display:grid;gap:5px;max-width:440px;width:100%}
.sch-grid.s7{max-width:470px;gap:4px}
.sch-cell{aspect-ratio:1;max-width:100%;background:var(--surface);border:1.5px solid var(--line);border-radius:10px;font-family:var(--fh);font-weight:800;font-size:clamp(16px,4.6vw,26px);color:var(--ink);padding:0;transition:background .12s}
.sch-grid.s7 .sch-cell{font-size:clamp(14px,3.8vw,21px);border-radius:8px}
.sch-cell:hover{border-color:var(--accent)}
.sch-cell.found{background:var(--surface2);color:var(--muted);opacity:.45}
.sch-cell.bad{background:var(--bad-bg);border-color:var(--bad)}

/* ciphers */
.cipher-card{margin-top:14px;background:var(--surface2);border-radius:14px;padding:14px 16px;border:1px dashed color-mix(in srgb,var(--brand-orange) 45%,transparent)}
.cipher-text{font-family:var(--fh);font-weight:800;font-size:clamp(20px,5vw,28px);letter-spacing:.14em;color:var(--ink);word-break:break-all;margin-top:4px}
.strip-wrap{overflow-x:auto;margin-top:6px;padding-bottom:4px}
.strip{display:inline-flex;flex-direction:column;gap:3px}
.srow{display:flex;gap:2px;align-items:center}
.srow .lbl{min-width:76px;font-size:10px}
.srow b{width:26px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--line);border-radius:5px;font-family:var(--fh);font-size:13px;flex:0 0 auto}
.srow b:nth-of-type(6){font-size:9px}
.srow.sh b{background:var(--amber-bg);color:var(--amber);border-color:transparent}
.cph-stats{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:16px;font-size:14px;color:var(--muted)}
.cph-stats b{color:var(--ink);font-family:var(--fh)}
@media (prefers-reduced-motion:reduce){.sch-cell{transition:none}}

#app{max-width:960px}
.eyebrow svg{vertical-align:-1px;margin-right:4px}

/* v2: plain background, flat brand-navy hero, legible hero card */
body{background-image:none}
.hero{background:var(--logo-hero,#0E3460);box-shadow:0 14px 36px rgba(14,52,96,.22)}

.hero .sub{color:#d5e0f0}
.hero .sub .kb{color:#ffffff}
.hero .sub .kg{color:#ffb39b}
.hero-card{background:#163f70;border:1px solid rgba(255,255,255,.18);color:#ffffff}
.hero-card .hc-sub{color:#d5e0f0}
.hero-card .hc-lbl{color:#c3d2e8}
.hero-card .hc-prog small{color:#c3d2e8}
.hero-card hr{border-top-color:rgba(255,255,255,.2)}
.hero-card .pbar{background:rgba(255,255,255,.22)}
.cta{background:#FE5D3C;box-shadow:0 8px 20px rgba(254,93,60,.35);gap:10px}
.cta:hover{background:#ef4a27;filter:none}
.cta-ico{flex:0 0 auto;color:#ffffff}

/* v3: Math Club */
.home-sec{margin-top:26px}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap}
.sec-head h2{font-size:24px;margin-top:4px}
.club-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-top:14px}
.club-card{display:flex;flex-direction:column;gap:10px;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px 22px;box-shadow:var(--shadow);color:var(--ink);font:inherit;cursor:pointer;transition:transform .12s ease;position:relative;overflow:hidden}
.club-card:not(.soon)::before{content:'';position:absolute;left:0;right:0;top:0;height:4px;background:var(--brand-orange)}
.club-card:not(.soon):hover{transform:translateY(-2px)}
.club-card:not(.soon):hover .card-arrow{background:var(--brand-orange);border-color:var(--brand-orange);color:#fff}
.club-card.soon{cursor:default;background:var(--surface2);box-shadow:none;border-style:dashed}
.club-card.soon .cc-ttl,.club-card.soon .cc-sum{color:var(--muted)}
.cc-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.cc-n{font-family:var(--fh);font-weight:800;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.cc-st{font-family:var(--fh);font-weight:700;font-size:11px;border-radius:99px;padding:3px 10px;background:var(--surface);color:var(--muted);border:1px solid var(--line)}
.cc-st.open{background:var(--amber-bg);color:var(--amber);border-color:transparent}
.cc-ttl{font-family:var(--fh);font-weight:800;font-size:20px;line-height:1.2;display:flex;gap:10px;align-items:center}
.cc-emo{font-size:24px}
.cc-sum{color:var(--muted);font-size:14px;line-height:1.5}
.cc-foot{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:4px}
.cc-foot .prog{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}
.club-hero{background:#0E3460;color:#fff;border-radius:22px;padding:28px 30px}
.club-hero h1{font-size:clamp(26px,4vw,36px);color:#fff}
.club-hero p{color:#d5e0f0;max-width:60ch;margin:10px 0 0;font-size:16px}
.th-prog{display:flex;align-items:center;gap:10px;margin-top:14px;color:#d5e0f0;font-size:14px}
.th-prog .num{font-family:var(--fh);font-weight:800;color:#fff;font-size:18px}
.th-prog .pbar{background:rgba(255,255,255,.22)}
.route{list-style:none;margin:16px 0 0;padding:0;display:flex;flex-direction:column}
.route li{display:flex;gap:14px;position:relative;padding-bottom:18px}
.route li:not(:last-child)::before{content:'';position:absolute;left:15px;top:34px;bottom:0;width:2px;background:var(--line)}
.r-dot{width:32px;height:32px;border-radius:50%;background:var(--accent);color:var(--on-accent);font-family:var(--fh);font-weight:800;display:flex;align-items:center;justify-content:center;flex:0 0 auto;font-size:14px}
.r-body{min-width:0;flex:1}
.r-ttl{font-family:var(--fh);font-weight:800;font-size:17px;margin-top:2px}
.r-body p{margin:4px 0 0;color:var(--muted);font-size:14.5px}
.r-acts{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.act{display:inline-flex;align-items:center;gap:7px;background:var(--surface);border:1.5px solid var(--line);color:var(--ink);border-radius:10px;padding:7px 12px;font-family:var(--fh);font-weight:700;font-size:13px}
.act:hover{border-color:var(--accent)}
.act.pri{background:var(--accent-soft);border-color:transparent;color:var(--accent)}
.act.done{background:var(--good-bg);color:var(--good);border-color:transparent}
.act .ai{font-size:12px}
.hm-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin-top:14px}
.hm{background:var(--surface2);border-radius:14px;padding:14px 16px;display:flex;flex-direction:column;gap:6px;align-items:flex-start}
.hm-ttl{font-family:var(--fh);font-weight:800}
.hm p{margin:0;font-size:14px;color:var(--muted)}
.th-two{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:16px}
@media (max-width:560px){.club-hero{padding:22px 20px}}
@media (prefers-reduced-motion:reduce){.club-card{transition:none}}
.topbar{gap:8px 10px}
.nav-link{padding:7px 9px;gap:5px}
.topbar .pill{padding:6px 10px}
@media (min-width:720px){.uname{max-width:90px}}