/* ============================================================
   Saxa Advisory — Design System v2
   Direction: diagnostic instrument. Data-forward, precise,
   graph-paper motif, animated score curve, domain-weight viz.
   ============================================================ */

:root {
  --paper:#F6F7F5; --paper-2:#EDEFEA; --ink:#111C33; --ink-soft:#2A3A5C;
  --signal:#2D5BFF; --signal-dk:#1E42C4; --signal-tint:#E7ECFF;
  --correct:#0FA968; --amber:#E8811B; --graphite:#5B6472;
  --line:#DADED6; --white:#FFF;

  --display:"Space Grotesk",system-ui,sans-serif;
  --body:"Source Serif 4",Georgia,serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;

  --s--1:.82rem; --s-0:1rem; --s-1:1.22rem; --s-2:1.55rem;
  --s-3:2.05rem; --s-4:2.85rem; --s-5:3.9rem; --s-6:5rem;

  --maxw:1140px; --radius:10px; --gap:1.4rem;
  --shadow:0 1px 2px rgba(17,28,51,.04),0 12px 32px -20px rgba(17,28,51,.28);
  --shadow-lg:0 2px 4px rgba(17,28,51,.05),0 30px 60px -35px rgba(17,28,51,.45);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

body{
  margin:0;font-family:var(--body);font-size:var(--s-0);line-height:1.6;
  color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;
  background-image:
    linear-gradient(rgba(17,28,51,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(17,28,51,.035) 1px,transparent 1px);
  background-size:30px 30px;
}

h1,h2,h3,h4,.display{font-family:var(--display);font-weight:600;line-height:1.05;letter-spacing:-.02em;color:var(--ink);margin:0 0 .5em}
p{margin:0 0 1em;max-width:64ch}
a{color:var(--signal);text-decoration:none}
a:hover{text-decoration:underline}
.mono{font-family:var(--mono)}
img,svg{max-width:100%}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.5rem}
section{padding:5.5rem 0}
.sep{border-top:1px solid var(--line)}
.center{text-align:center}
.mt1{margin-top:1rem}.mt2{margin-top:2rem}.mt3{margin-top:3rem}
.max52{max-width:52ch}.max60{max-width:60ch}

.eyebrow{
  font-family:var(--mono);font-size:var(--s--1);letter-spacing:.16em;
  text-transform:uppercase;color:var(--signal);display:inline-flex;align-items:center;gap:.5rem;margin-bottom:1rem;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--signal);display:inline-block}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(246,247,245,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:.8rem 1.5rem}
.brand{font-family:var(--display);font-weight:700;font-size:var(--s-1);color:var(--ink);letter-spacing:-.02em;display:flex;align-items:center;gap:.55rem}
.brand:hover{text-decoration:none}
.brand-mark{width:28px;height:28px;flex:none;border-radius:7px;background:var(--ink);position:relative;overflow:hidden}
.brand-mark::before{content:"";position:absolute;left:5px;right:5px;bottom:6px;top:6px;background:
  linear-gradient(to top right,transparent 44%,var(--signal) 44%,var(--signal) 56%,transparent 56%)}
.brand-mark::after{content:"";position:absolute;left:5px;bottom:6px;width:4px;height:4px;border-radius:50%;background:var(--correct)}
.nav-links{display:flex;gap:1.7rem;align-items:center}
.nav-links a{font-family:var(--display);font-size:var(--s--1);color:var(--ink-soft);font-weight:500}
.nav-links a.active{color:var(--signal)}
.nav-links a.nav-cta{background:var(--signal);color:#fff;padding:.45rem .9rem;border-radius:7px}
.nav-links a.nav-cta:hover{background:var(--signal-dk);text-decoration:none}
.nav-toggle{display:none;background:none;border:0;font-size:1.4rem;cursor:pointer;color:var(--ink)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--display);font-weight:600;font-size:var(--s-0);padding:.75rem 1.5rem;border-radius:8px;border:2px solid var(--ink);cursor:pointer;transition:transform .12s,background .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{background:var(--signal);border-color:var(--signal);color:#fff;box-shadow:0 8px 20px -8px rgba(45,91,255,.6)}
.btn-primary:hover{background:var(--signal-dk);border-color:var(--signal-dk)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn svg{width:18px;height:18px}

/* ---------- Hero ---------- */
.hero{padding:5rem 0 6rem;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:3.5rem;align-items:center}
.hero h1{font-size:var(--s-6);letter-spacing:-.03em}
.hero h1 .hl{color:var(--signal);position:relative;white-space:nowrap}
.hero .lead{font-size:var(--s-1);color:var(--ink-soft);max-width:42ch;margin-top:.5rem}
.hero-cta{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.8rem}
.hero-chips{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1.6rem}
.chip{font-family:var(--mono);font-size:var(--s--1);color:var(--ink-soft);background:var(--white);border:1px solid var(--line);border-radius:20px;padding:.3rem .8rem;display:inline-flex;align-items:center;gap:.4rem}
.chip b{color:var(--ink)}

.hero-panel{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:1.4rem;box-shadow:var(--shadow-lg);position:relative}
.hero-panel .panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}
.hero-panel .panel-head span{font-family:var(--mono);font-size:var(--s--1);color:var(--graphite)}
.dot-live{width:8px;height:8px;border-radius:50%;background:var(--correct);display:inline-block;margin-right:.4rem;box-shadow:0 0 0 0 rgba(15,169,104,.5);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(15,169,104,.45)}70%{box-shadow:0 0 0 8px rgba(15,169,104,0)}100%{box-shadow:0 0 0 0 rgba(15,169,104,0)}}

/* animated curve */
.curve-line{stroke-dasharray:600;stroke-dashoffset:600;animation:draw 2s ease-out forwards}
.curve-fill{opacity:0;animation:fade 1.2s ease-out .8s forwards}
.curve-dot{opacity:0;animation:fade .4s ease-out 1.9s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes fade{to{opacity:1}}

/* animated score bars */
.score-bar{transform-origin:bottom;transform:scaleY(0);animation:growY 1s cubic-bezier(.2,.7,.3,1) .1s forwards}
.score-bar.b2{animation-delay:.35s}
@keyframes growY{to{transform:scaleY(1)}}
.score-arrow{stroke-dasharray:260;stroke-dashoffset:260;animation:draw 1s ease-out 1.1s forwards}
.score-badge{opacity:0;transform:translateY(6px) scale(.9);transform-origin:center;animation:badgeIn .5s ease-out 1.5s forwards}
@keyframes badgeIn{to{opacity:1;transform:translateY(0) scale(1)}}
.score-label{opacity:0;animation:fade .5s ease-out 1.4s forwards}

/* ---------- Data strip / stats ---------- */
.datastrip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--white)}
.datastrip .cell{padding:1.5rem;border-right:1px solid var(--line)}
.datastrip .cell:last-child{border-right:0}
.datastrip .num{font-family:var(--mono);font-size:var(--s-3);color:var(--ink);font-weight:600;line-height:1}
.datastrip .num em{color:var(--signal);font-style:normal}
.datastrip .lbl{font-size:var(--s--1);color:var(--graphite);margin-top:.4rem}

/* ---------- Section headers ---------- */
.sec-head{max-width:44ch}
.sec-head h2{font-size:var(--s-4)}
.sec-head p{color:var(--ink-soft);font-size:var(--s-1)}

/* ---------- Cards ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:1.7rem;transition:border-color .18s,transform .14s,box-shadow .18s;position:relative}
.card:hover{border-color:var(--signal);transform:translateY(-3px);box-shadow:var(--shadow)}
.card h3{font-size:var(--s-2)}
.card p{color:var(--graphite);margin-bottom:0}
.card-num{font-family:var(--mono);font-size:var(--s--1);color:var(--signal);letter-spacing:.1em;font-weight:500}

/* ---------- Auth form ---------- */
.role-toggle{display:flex;border:1px solid var(--line);border-radius:8px;padding:.25rem;gap:.25rem;background:var(--paper-2)}
.role-opt{flex:1;font-family:var(--display);font-weight:600;font-size:var(--s--1);padding:.55rem 1rem;border:0;border-radius:6px;background:transparent;color:var(--graphite);cursor:pointer;transition:background .15s,color .15s}
.role-opt.is-active{background:var(--white);color:var(--ink);box-shadow:var(--shadow)}
.field-label{display:block;font-family:var(--display);font-weight:500;font-size:var(--s--1);color:var(--ink-soft);margin-bottom:.4rem}
.field-input{width:100%;font-family:var(--body);font-size:var(--s-0);padding:.7rem .85rem;border:1px solid var(--line);border-radius:8px;background:var(--white);color:var(--ink);transition:border-color .15s,box-shadow .15s}
.field-input:focus{outline:none;border-color:var(--signal);box-shadow:0 0 0 3px var(--signal-tint)}
.field-row{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.check-label{display:flex;align-items:center;gap:.4rem;font-size:var(--s--1);color:var(--graphite)}
.assign-form{display:flex;gap:.6rem;flex-wrap:wrap}
.assign-form .field-input{flex:1;min-width:180px}
.icon-badge{width:44px;height:44px;border-radius:11px;background:var(--signal-tint);display:flex;align-items:center;justify-content:center;margin-bottom:1rem}
.icon-badge svg{width:22px;height:22px;stroke:var(--signal)}
.icon-badge.green{background:#E0F5EC}.icon-badge.green svg{stroke:var(--correct)}
.icon-badge.amber{background:#FBEEDD}.icon-badge.amber svg{stroke:var(--amber)}

/* ---------- Domain weight bars ---------- */
.weights{display:flex;flex-direction:column;gap:1.1rem}
.wbar{display:grid;grid-template-columns:200px 1fr 54px;align-items:center;gap:1rem}
.wbar .name{font-family:var(--display);font-weight:500;font-size:var(--s-0)}
.wbar .track{height:12px;background:var(--paper-2);border-radius:20px;overflow:hidden}
.wbar .fill{height:100%;border-radius:20px;background:var(--signal);transform-origin:left;transform:scaleX(0);animation:grow 1.1s cubic-bezier(.2,.7,.3,1) forwards}
.wbar .fill.c2{background:var(--signal-dk)}.wbar .fill.c3{background:var(--correct)}.wbar .fill.c4{background:var(--amber)}
.wbar .pct{font-family:var(--mono);font-size:var(--s-0);color:var(--ink);text-align:right}
@keyframes grow{to{transform:scaleX(1)}}

/* ---------- Adaptive module diagram ---------- */
.adaptive{display:grid;grid-template-columns:1fr auto 1fr;gap:1rem;align-items:center}
.mod-box{background:var(--white);border:2px solid var(--ink);border-radius:12px;padding:1.3rem 1.5rem}
.mod-box .tag{font-family:var(--mono);font-size:var(--s--1);color:var(--graphite);text-transform:uppercase;letter-spacing:.08em}
.mod-box h4{font-size:var(--s-1);margin:.3rem 0 .3rem}
.mod-box.hard{border-color:var(--signal)}
.mod-box.easy{border-color:var(--correct)}
.branch{display:flex;flex-direction:column;gap:1rem}
.arrow-col{display:flex;flex-direction:column;align-items:center;color:var(--graphite);font-family:var(--mono);font-size:var(--s--1)}
.arrow-col svg{width:40px;height:40px}

/* ---------- Tier pills ---------- */
.tier-pill{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;padding:.14rem .55rem;border-radius:20px;border:1px solid var(--line);text-transform:uppercase;display:inline-flex;align-items:center;gap:.3rem}
.tier-pill::before{content:"";width:6px;height:6px;border-radius:50%;display:inline-block;background:currentColor}
.t1{color:var(--correct);border-color:var(--correct)}
.t2{color:var(--signal);border-color:var(--signal)}
.t3{color:var(--amber);border-color:var(--amber)}
.new-tag{font-family:var(--mono);font-size:.68rem;background:var(--signal);color:#fff;padding:.1rem .45rem;border-radius:4px;letter-spacing:.05em;text-transform:uppercase;vertical-align:middle}

/* domain list inside module cards */
.mlist{list-style:none;padding:0;margin:1rem 0 0}
.mlist li{padding:.55rem 0;border-top:1px dashed var(--line);display:flex;justify-content:space-between;align-items:center;gap:.6rem;font-size:var(--s-0);color:var(--ink)}
.mlist li:first-child{border-top:0}

/* ---------- Pending / slots ---------- */
.pending{display:inline-block;font-family:var(--mono);font-size:.7rem;background:#FEF3C7;color:#8A5A00;border:1px solid #F4CE63;padding:.1rem .5rem;border-radius:4px;letter-spacing:.04em;text-transform:uppercase}
.slot{border:2px dashed var(--signal);background:rgba(45,91,255,.045);border-radius:14px;padding:2.5rem 1.5rem;text-align:center}
.slot .slot-tag{font-family:var(--mono);font-size:var(--s--1);color:var(--signal);letter-spacing:.08em;text-transform:uppercase}
.slot p{margin:.5rem auto;color:var(--ink-soft)}

/* ---------- Pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.price-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:2.2rem;display:flex;flex-direction:column;position:relative}
.price-card.featured{border:2px solid var(--signal);box-shadow:var(--shadow)}
.price-card .flag{position:absolute;top:-12px;left:2.2rem;background:var(--signal);color:#fff;font-family:var(--mono);font-size:var(--s--1);padding:.2rem .7rem;border-radius:6px;text-transform:uppercase;letter-spacing:.06em}
.price-amt{font-family:var(--mono);font-size:var(--s-4);color:var(--ink);font-weight:600}
.price-amt small{font-size:var(--s-0);color:var(--graphite);font-weight:400}
.price-card ul{list-style:none;padding:0;margin:1.4rem 0;flex:1}
.price-card ul li{padding:.5rem 0 .5rem 1.8rem;position:relative;color:var(--ink-soft)}
.price-card ul li::before{content:"";position:absolute;left:0;top:.7rem;width:14px;height:8px;border-left:2px solid var(--correct);border-bottom:2px solid var(--correct);transform:rotate(-45deg)}

/* ---------- Tutors ---------- */
.tutor-photo{width:100%;aspect-ratio:4/5;background:linear-gradient(135deg,var(--paper-2),var(--signal-tint));border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:1.1rem;position:relative;overflow:hidden}
.tutor-photo .ph{font-family:var(--mono);font-size:var(--s--1);color:var(--graphite)}
.tutor-photo::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(17,28,51,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(17,28,51,.05) 1px,transparent 1px);background-size:18px 18px}

/* ---------- Steps (how it works) ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);counter-reset:step}
.step{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:1.7rem;position:relative}
.step .k{font-family:var(--mono);font-size:var(--s--1);color:var(--signal);letter-spacing:.1em;text-transform:uppercase}
.step h3{font-size:var(--s-2);margin:.5rem 0 .4rem}
.step p{color:var(--graphite);margin:0}
.step .line{position:absolute;top:2.4rem;right:-.7rem;width:1.4rem;height:2px;background:var(--line)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink);border-radius:20px;padding:3.5rem;color:var(--paper);position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:30px 30px}
.cta-band h2{color:#fff;font-size:var(--s-4);position:relative}
.cta-band p{color:#B9C2D6;position:relative;max-width:50ch}
.cta-band .hero-cta{position:relative}
.cta-band .btn-ghost{color:#fff;border-color:#3A4B6E}
.cta-band .btn-ghost:hover{background:#fff;color:var(--ink)}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:3rem 0;margin-top:2rem;background:var(--ink);color:var(--paper)}
.footer .wrap{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;align-items:flex-start}
.footer a{color:#C6CFE0}
.footer .brand{color:#fff}
.footer .fcol h5{font-family:var(--display);font-size:var(--s--1);text-transform:uppercase;letter-spacing:.1em;color:#8794AE;margin:0 0 .7rem}
.footer .fcol a{display:block;padding:.2rem 0;font-family:var(--display);font-size:var(--s-0)}
.footer small{font-family:var(--mono);color:#7C89A3;font-size:var(--s--1)}

:focus-visible{outline:3px solid var(--signal);outline-offset:2px}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero-grid,.grid-2,.grid-3,.grid-4,.price-grid,.steps,.adaptive{grid-template-columns:1fr}
  .datastrip{grid-template-columns:repeat(2,1fr)}
  .datastrip .cell:nth-child(2){border-right:0}
  .datastrip .cell:nth-child(1),.datastrip .cell:nth-child(2){border-bottom:1px solid var(--line)}
  .hero h1{font-size:var(--s-4)}
  .wbar{grid-template-columns:130px 1fr 44px;gap:.6rem}
  .wbar .name{font-size:var(--s--1)}
  .arrow-col{transform:rotate(90deg);padding:1rem 0}
  .step .line{display:none}
  .cta-band{padding:2.2rem}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:var(--paper);border-bottom:1px solid var(--line);padding:.5rem 1.5rem 1rem}
  .nav-links.open{display:flex}
  .nav-links a{padding:.7rem 0;border-top:1px solid var(--line)}
  .nav-links a.nav-cta{text-align:center;margin-top:.5rem}
  .nav-toggle{display:block}
}