/* =====================================================================
   6 in 6 — Learning Portal · by Sigmaschool
   A focused course player: sidebar of lessons + an inline lesson pane
   that serves the slides and video walkthroughs. No popups.
   Clean blue/navy, inspired by sigmaschool.co.
   ===================================================================== */
:root{
  --white:#FFFFFF; --bg:#FFFFFF; --bg-soft:#F4F7FE; --bg-tint:#EEF3FD;
  --navy:#0B1B3B; --navy-2:#102A56; --ink:#18233B; --text:#36425A;
  --muted:#647088; --muted-2:#94A0B8;
  --blue:#3435FF; --blue-bright:#5B5CFF; --blue-deep:#2426D6; --blue-soft:#DEDEFF; --sky:#EFEFFF;
  --green:#16A34A; --green-soft:#DCFCE7; --amber:#F59E0B;
  --line:#E6E6F5; --line-2:#D6D6EC;
  --grad:linear-gradient(135deg,#5B5CFF 0%,#2426D6 100%);
  --grad-navy:linear-gradient(160deg,#102A56 0%,#0B1B3B 100%);
  --radius:18px; --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(11,27,59,.22);
  --shadow-sm:0 6px 18px -8px rgba(11,27,59,.16);
  --shadow-lg:0 30px 70px -30px rgba(11,27,59,.30);
  --topbar-h:62px; --sidebar-w:300px; --sidebar-rail:66px;
  --promo-h:36px; --header-h:calc(var(--promo-h) + var(--topbar-h));
  --font-display:"Plus Jakarta Sans",system-ui,sans-serif;
  --font-body:"Inter",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);background:var(--bg);color:var(--text);
  line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.12;margin:0;color:var(--navy);letter-spacing:-.02em}
::selection{background:var(--blue);color:#fff}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-display);font-weight:700;
  font-size:.95rem;padding:.8rem 1.4rem;border-radius:11px;cursor:pointer;border:1px solid transparent;
  transition:transform .16s,box-shadow .16s,background .16s,color .16s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 26px -10px rgba(37,99,235,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px -10px rgba(37,99,235,.65)}
.btn-ghost{background:var(--white);border-color:var(--line-2);color:var(--navy)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--blue);color:var(--blue)}
.btn-light{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.3)}
.btn-light:hover{background:rgba(255,255,255,.26)}
.btn:disabled{opacity:.4;cursor:not-allowed;pointer-events:none}

/* ===================== TOPBAR ===================== */
html.promo-dismissed{--promo-h:0px}
/* subtle announcement bar → main Sigmaschool site */
.promo-bar{position:sticky;top:0;z-index:45;height:var(--promo-h);display:flex;align-items:center;justify-content:center;
  gap:.5rem;padding:0 2.4rem 0 1rem;background:var(--bg-soft);color:var(--muted);border-bottom:1px solid var(--line);overflow:hidden}
html.promo-dismissed .promo-bar{display:none}
.promo-link{display:inline-flex;align-items:center;gap:.5rem;min-width:0;color:var(--muted);font-size:.8rem;font-weight:500}
.promo-link:hover{color:var(--navy)}
.promo-link .promo-txt{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.promo-arrow{color:var(--blue);font-weight:700;flex-shrink:0}
.promo-dot{width:6px;height:6px;border-radius:50%;background:var(--blue);flex-shrink:0}
.promo-close{position:absolute;right:.5rem;top:50%;transform:translateY(-50%);background:none;border:0;
  color:var(--muted-2);cursor:pointer;font-size:.8rem;line-height:1;padding:.2rem}
.promo-close:hover{color:var(--navy)}
.topbar{position:sticky;top:var(--promo-h);z-index:40;height:var(--topbar-h);display:flex;align-items:center;gap:1rem;
  padding:0 1.2rem;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
/* hamburger only opens the drawer on mobile; desktop uses the in-sidebar collapse button */
.menu-btn{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--white);
  color:var(--navy);cursor:pointer;align-items:center;justify-content:center}
.menu-btn:hover{background:var(--bg-soft);border-color:var(--blue);color:var(--blue)}
.menu-btn svg{width:20px;height:20px}
.brand{display:flex;align-items:center;gap:.55rem;font-family:var(--font-display);font-weight:800;font-size:1.22rem;color:var(--navy)}
.brand-mark{width:34px;height:34px}
.brand-text{letter-spacing:-.03em}
.brand-by{font-family:var(--font-body);font-weight:500;font-size:.72rem;color:var(--muted-2);margin-left:.1rem}
.topbar-spacer{flex:1}
.topbar-link{font-family:var(--font-display);font-weight:700;font-size:.9rem;color:var(--blue);display:inline-flex;gap:.3rem;align-items:center}
.topbar-link:hover{color:var(--blue-deep)}

/* ===================== LAYOUT ===================== */
.layout{display:grid;grid-template-columns:var(--sidebar-w) 1fr;align-items:start}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:var(--header-h);height:calc(100vh - var(--header-h));overflow-y:auto;
  background:var(--bg-soft);border-right:1px solid var(--line);padding:1.4rem 1rem;display:flex;flex-direction:column;gap:1.2rem}
/* in-sidebar collapse toggle (desktop) */
.side-collapse{align-self:flex-end;width:30px;height:30px;border-radius:8px;border:1px solid var(--line);background:var(--white);
  color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:.15s;flex-shrink:0;margin-bottom:-.4rem}
.side-collapse:hover{color:var(--blue);border-color:var(--blue)}
.side-collapse svg{width:16px;height:16px;transition:transform .2s}
.layout.nav-collapsed .side-collapse{align-self:center}
.layout.nav-collapsed .side-collapse svg{transform:rotate(180deg)}
.side-title{font-family:var(--font-display);font-weight:800;font-size:.78rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted-2);padding:0 .4rem}
.side-progress{padding:0 .4rem}
.side-progress .pmeta{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:.45rem}
.side-progress .plabel{font-family:var(--font-display);font-weight:700;font-size:.9rem;color:var(--navy)}
.side-progress .pcount{font-size:.84rem;color:var(--muted)}
.side-progress .pcount b{color:var(--green);font-family:var(--font-display)}
.ptrack{height:9px;border-radius:999px;background:var(--bg-tint);border:1px solid var(--line);overflow:hidden}
.pfill{height:100%;width:0;border-radius:999px;background:var(--grad);transition:width .5s cubic-bezier(.2,.8,.2,1)}
.reset-link{margin-top:.55rem;background:none;border:none;color:var(--muted-2);font-size:.78rem;cursor:pointer;
  text-decoration:underline;font-family:var(--font-body);padding:0 .4rem}
.reset-link:hover{color:var(--blue)}

.side-nav{display:flex;flex-direction:column;gap:.3rem;flex:1}
.nav-item{display:flex;align-items:center;gap:.7rem;padding:.7rem .75rem;border-radius:11px;cursor:pointer;
  border:1px solid transparent;background:none;width:100%;text-align:left;font-family:inherit;color:var(--text);transition:.15s}
.nav-item:hover{background:var(--white);border-color:var(--line)}
.nav-item.active{background:var(--white);border-color:var(--blue-soft);box-shadow:var(--shadow-sm)}
.nav-item.active .ni-title{color:var(--blue-deep)}
.ni-badge{width:30px;height:30px;border-radius:9px;flex-shrink:0;display:grid;place-items:center;
  font-family:var(--font-display);font-weight:800;font-size:.78rem;background:var(--white);border:1px solid var(--line-2);color:var(--muted)}
.nav-item.active .ni-badge{background:var(--grad);color:#fff;border-color:transparent}
.nav-item.done .ni-badge{background:var(--green);color:#fff;border-color:transparent}
.nav-item.welcome .ni-badge{font-size:1rem}
.ni-main{min-width:0;flex:1}
.ni-kicker{display:block;font-size:.68rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2)}
.ni-title{display:block;font-family:var(--font-display);font-weight:700;font-size:.95rem;color:var(--navy);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ni-check{width:18px;height:18px;flex-shrink:0;color:var(--green);opacity:0}
.nav-item.done .ni-check{opacity:1}

/* Locked (not-yet-unlocked) days in the sidebar */
.ni-lock{width:16px;height:16px;flex-shrink:0;color:var(--muted-2);display:none}
.nav-item.locked{opacity:.6}
.nav-item.locked .ni-badge{background:var(--bg-tint);color:var(--muted-2);border-color:var(--line)}
.nav-item.locked .ni-check{display:none}
.nav-item.locked .ni-lock{display:inline-flex}

.side-foot{border-top:1px solid var(--line);padding:1rem .4rem 0;display:flex;flex-direction:column;gap:.6rem}
.side-foot a{font-size:.86rem;color:var(--muted);font-weight:600;display:inline-flex;align-items:center;gap:.4rem}
.side-foot a:hover{color:var(--blue)}
.side-foot .sf-brand{font-size:.78rem;color:var(--muted-2);margin-top:.3rem}
.side-foot .sf-brand a{color:var(--blue);display:inline}

/* ---------- sidebar drawer (mobile) ---------- */
.backdrop{display:none;position:fixed;inset:0;background:rgba(11,27,59,.45);z-index:55}
.backdrop.show{display:block}

/* ===================== LESSON PANE ===================== */
.lesson{min-width:0}
/* centered column for Welcome + no-editor days (e.g. Day 0) */
.lesson-inner{max-width:1080px;margin:0 auto;padding:2.2rem 2rem 4rem}
.lesson-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1rem}
.crumb{font-family:var(--font-display);font-weight:700;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--blue)}
.lesson-actions{display:flex;gap:.5rem}
.icon-btn{height:40px;padding:0 .95rem;border-radius:11px;background:var(--bg-soft);border:1px solid var(--line);
  color:var(--navy);cursor:pointer;display:inline-flex;align-items:center;gap:.4rem;
  font-family:var(--font-display);font-weight:700;font-size:.86rem;transition:.16s}
.icon-btn:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
.icon-btn svg{width:18px;height:18px}
.lesson-title{font-size:clamp(1.7rem,3.4vw,2.4rem);font-weight:800;margin:.2rem 0 .5rem}
.lesson-kicker{color:var(--muted);font-size:1.08rem;margin:0 0 1.1rem;max-width:64ch}
.m-build{display:inline-flex;align-items:center;gap:.5rem;padding:.45rem .9rem;border-radius:999px;
  background:var(--green-soft);color:#0F7A37;font-weight:700;font-size:.88rem;margin-bottom:1.4rem}

/* media: slides + video stacked in the content column */
.media{display:flex;flex-direction:column;gap:1rem}
.frame{margin:0;position:relative;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line);
  background:#0B1B3B;box-shadow:var(--shadow-sm)}
.frame .frame-cap{position:absolute;top:0;left:0;z-index:2;font-family:var(--font-display);font-weight:700;
  font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:#fff;background:rgba(11,27,59,.74);padding:.3rem .7rem;border-radius:0 0 9px 0}
.frame .ratio{position:relative;width:100%;aspect-ratio:16/9}
.frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.frame-skeleton{position:absolute;inset:0;background:
  linear-gradient(110deg,var(--bg-soft) 30%,var(--bg-tint) 50%,var(--bg-soft) 70%)}

/* ===== Locked day: blurred preview + tinted lock overlay ===== */
.locked-wrap{position:relative;min-height:calc(100vh - var(--header-h))}
.locked-bg{filter:blur(4px) saturate(.55);opacity:.55;pointer-events:none;user-select:none}
.lock-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  padding:1.5rem;background:rgba(238,243,253,.62);backdrop-filter:blur(2px)}
.lock-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:2.2rem 2rem;max-width:420px;text-align:center}
.lock-emoji{display:inline-flex;width:46px;height:46px;align-items:center;justify-content:center;
  margin-bottom:.9rem;border-radius:50%;background:var(--bg-tint);color:var(--blue)}
.lock-emoji svg{width:24px;height:24px}
.lock-card h2{font-family:var(--font-display);font-weight:800;font-size:1.35rem;color:var(--navy)}
.lock-card p{color:var(--muted);margin:.6rem 0 1.3rem;line-height:1.5}
.lock-card .lock-go{background:var(--grad);color:#fff}
.lock-card .lock-go svg{width:18px;height:18px}

/* ===== Codecademy-style workspace: lesson content LEFT, editor RIGHT (full height) ===== */
.lesson-split{display:grid;grid-template-columns:minmax(280px,35%) 10px 1fr;height:calc(100vh - var(--header-h))}
.lesson-content{overflow-y:auto;min-width:0}
.lesson-content .lesson-inner{max-width:none;margin:0;padding:1.7rem 1.6rem 3rem}
/* draggable divider between content and editor, with a dotted grip */
.gutter{cursor:col-resize;background:var(--line);position:relative;transition:background .15s;color:var(--muted-2)}
.gutter:hover,.gutter:active{background:var(--blue-soft);color:var(--blue)}
.gutter::after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:6px;height:30px;background-image:radial-gradient(currentColor 1.1px,transparent 1.6px);
  background-size:4px 6px;background-position:center;transition:color .15s}
body.col-resizing{cursor:col-resize;user-select:none}
body.col-resizing iframe{pointer-events:none}
.editor-pane{display:flex;flex-direction:column;min-width:0;border-left:1px solid var(--line);background:#0B1B3B}
.editor-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-shrink:0;
  padding:.5rem .9rem;background:var(--bg-soft);border-bottom:1px solid var(--line)}
.editor-headinfo{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.editor-title{font-family:var(--font-display);font-weight:800;font-size:.88rem;color:var(--navy);display:flex;align-items:center;gap:.45rem}
.editor-title svg{width:18px;height:18px;color:var(--blue)}
.editor-hint{font-size:.74rem;color:var(--muted)}
.editor-save{flex-shrink:0;display:inline-flex;align-items:center;gap:.4rem;font-family:var(--font-display);font-weight:700;
  font-size:.82rem;padding:.5rem .85rem;border-radius:10px;background:var(--grad);color:#fff;white-space:nowrap;
  box-shadow:0 8px 18px -10px rgba(52,53,255,.55);transition:transform .15s,box-shadow .15s}
.editor-save:hover{transform:translateY(-1px);box-shadow:0 12px 24px -10px rgba(52,53,255,.7)}
.editor-toggle{font-family:var(--font-body);font-size:.82rem;color:var(--muted);background:none;border:0;cursor:pointer;text-decoration:underline}
.editor-toggle:hover{color:var(--blue)}
.ws-embed{flex:1;min-height:0}
.ws-embed[hidden]{display:none}
.ws-embed iframe{width:100%;height:100%;border:0;display:block}
/* minimize the left nav to a navigable icon rail on desktop */
@media (min-width:981px){
  .layout.nav-collapsed{grid-template-columns:var(--sidebar-rail) 1fr}
  .layout.nav-collapsed .sidebar{padding:1rem .5rem}
  .layout.nav-collapsed .nav-item{justify-content:center;padding:.5rem;gap:0}
  .layout.nav-collapsed .ni-main,
  .layout.nav-collapsed .ni-check,
  .layout.nav-collapsed .pmeta,
  .layout.nav-collapsed .reset-link,
  .layout.nav-collapsed .side-foot{display:none}
  .layout.nav-collapsed .side-progress{padding:0}
}

/* checklist */
.lesson-section{margin-top:1.8rem}
.lesson-section h3{font-family:var(--font-display);font-weight:800;font-size:1.12rem;margin-bottom:.85rem;
  display:flex;align-items:center;gap:.5rem;color:var(--navy)}
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:.55rem;max-width:680px}
.check-item{display:flex;gap:.7rem;align-items:flex-start;padding:.8rem 1rem;border-radius:11px;cursor:pointer;
  background:var(--bg-soft);border:1px solid var(--line);font-size:.95rem;color:var(--text);transition:border-color .15s,background .15s}
.check-item:hover{border-color:var(--blue-soft)}
.check-item:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.check-box{width:20px;height:20px;border-radius:6px;border:2px solid var(--blue);flex-shrink:0;margin-top:1px;
  display:grid;place-items:center;color:transparent;transition:.15s}
.check-box::after{content:"✓";font-size:.78rem;font-weight:800;line-height:1}
.check-item.checked .check-box{background:var(--green);border-color:var(--green);color:#fff}
.check-item.checked .check-label{color:var(--muted);text-decoration:line-through}

/* lesson footer: complete + pager */
.lesson-foot{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;margin-top:2rem;padding-top:1.6rem;border-top:1px solid var(--line)}
.done-btn{background:var(--green);color:#fff;border:none}
.done-btn:hover{transform:translateY(-2px);box-shadow:0 12px 24px -10px rgba(22,163,74,.5)}
.done-btn.is-done{background:var(--white);color:var(--green);border:1px solid var(--green)}
.lesson-feedback{color:var(--muted);font-size:.9rem}
.lesson-feedback a{color:var(--blue);font-weight:700}
.pager{margin-left:auto;display:flex;gap:.6rem}
.pager a{display:inline-flex;align-items:center;gap:.4rem;padding:.65rem 1rem;border-radius:11px;border:1px solid var(--line);
  background:var(--white);font-family:var(--font-display);font-weight:700;font-size:.88rem;color:var(--navy);transition:.16s}
.pager a:hover{border-color:var(--blue);color:var(--blue)}
.pager a.disabled{opacity:.4;pointer-events:none}

/* next steps (end of bonus) */
.next-steps{margin-top:2.4rem;display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.next-steps.single{grid-template-columns:1fr}
.ns-card{padding:1.5rem;border-radius:var(--radius);border:1px solid var(--line);background:var(--white);box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;gap:.5rem;transition:transform .2s,box-shadow .2s,border-color .2s}
.ns-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--blue-soft)}
.ns-card.dark{background:var(--grad-navy);border-color:transparent}
.ns-card.dark h3{color:#fff}.ns-card.dark p{color:#C3CFE6}.ns-card.dark .ns-go{color:#7FB0FF}
.ns-tag{align-self:flex-start;font-family:var(--font-display);font-weight:800;font-size:.68rem;text-transform:uppercase;
  letter-spacing:.1em;padding:.3rem .65rem;border-radius:999px;background:var(--sky);color:var(--blue-deep)}
.ns-card.dark .ns-tag{background:rgba(255,255,255,.16);color:#fff}
.ns-card h3{font-size:1.25rem}.ns-card p{color:var(--muted);font-size:.94rem;margin:0;flex-grow:1}
.ns-go{font-family:var(--font-display);font-weight:700;color:var(--blue);font-size:.9rem}

/* ===================== WELCOME VIEW ===================== */
.welcome .eyebrow{display:inline-block;font-family:var(--font-display);font-weight:800;font-size:.8rem;
  text-transform:uppercase;letter-spacing:.14em;color:var(--blue);margin-bottom:.7rem}
.welcome h1{font-size:clamp(2rem,4.4vw,3.1rem);font-weight:800;margin-bottom:.8rem}
.welcome .lede{color:var(--muted);font-size:1.15rem;max-width:54ch;margin:0 0 1.4rem}
.welcome .lede strong{color:var(--navy)}
.stack-chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.6rem}
.stack-chips span{font-family:var(--font-display);font-weight:700;font-size:.84rem;padding:.4rem .85rem;border-radius:9px;
  background:var(--bg-soft);border:1px solid var(--line);color:var(--text)}
.stack-chips span.ai{background:var(--grad);color:#fff;border-color:transparent}
.welcome-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-top:2.6rem}
.welcome-cols h3{font-family:var(--font-display);font-weight:800;font-size:1.05rem;margin-bottom:.9rem}
.welcome-cols ul{list-style:none;padding:0;margin:0;display:grid;gap:.6rem}
.welcome-cols li{display:flex;gap:.6rem;align-items:flex-start;font-size:.94rem;color:var(--text)}
.welcome-cols li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue);margin-top:.5rem;flex-shrink:0}
.welcome-cols .ico-li::before{display:none}
.mantra{margin:2.6rem 0 0;padding:1.1rem 1.4rem;border-left:4px solid var(--blue);font-family:var(--font-display);
  font-weight:800;font-size:1.3rem;color:var(--navy);background:var(--sky);border-radius:0 12px 12px 0}
.mantra span{display:block;font-size:.92rem;font-weight:500;color:var(--muted);font-family:var(--font-body);margin-top:.35rem}
.welcome .remark-note{margin-top:1.8rem;font-size:.95rem;color:var(--muted);max-width:60ch}
.welcome .remark-note strong{color:var(--navy)}

/* confetti */
.confetti{position:fixed;inset:0;pointer-events:none;z-index:400;display:none}
.confetti.live{display:block}

/* ===================== TRUST · CAPTURE · CERTIFICATE ===================== */
.welcome-greet{font-family:var(--font-display);font-weight:700;color:var(--blue);margin:0 0 .4rem;font-size:1rem}
.proof-strip{display:flex;flex-wrap:wrap;gap:.7rem 1.5rem;align-items:center;margin:1.6rem 0 .4rem;
  padding:.85rem 1.1rem;background:var(--bg-soft);border:1px solid var(--line);border-radius:14px}
.proof-item{display:inline-flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--muted);font-weight:500}
.proof-item b{color:var(--navy);font-family:var(--font-display);font-weight:800}
.proof-stars{color:#F5A623;letter-spacing:1px}
.proof-ico{font-size:1.05rem}
.proof-press{color:var(--muted-2);font-style:italic}

.capture{margin:2rem 0;padding:1.5rem 1.6rem;border-radius:var(--radius);
  background:linear-gradient(160deg,var(--sky),#fff);border:1px solid var(--blue-soft)}
.capture-head h3{font-family:var(--font-display);font-weight:800;font-size:1.15rem;color:var(--navy)}
.capture-head p{color:var(--muted);font-size:.94rem;margin:.35rem 0 1rem;max-width:62ch}
.capture-fields{display:flex;flex-wrap:wrap;gap:.6rem}
.capture-input{flex:1;min-width:160px;padding:.7rem .9rem;border-radius:10px;border:1px solid var(--line-2);
  background:#fff;font-family:var(--font-body);font-size:.95rem;color:var(--ink)}
.capture-input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.capture-input.err{border-color:#E5484D;box-shadow:0 0 0 3px #FBE7E7}
.capture-fields .btn{flex-shrink:0}
.capture-msg{display:none;color:var(--green);font-weight:700;font-size:.92rem;margin:.85rem 0 0}
.capture-tip{color:var(--muted);font-size:.83rem;margin:.7rem 0 0}
.capture-tip strong{color:var(--navy)}
.capture.is-saved .capture-msg{display:block}

.finish{margin:2.4rem 0 1rem;padding:1.9rem 1.6rem;border-radius:var(--radius);background:var(--grad-navy);color:#fff;text-align:center}
.finish-kicker{font-family:var(--font-display);font-weight:800;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:#9CC0FF}
.finish-title{color:#fff;font-size:clamp(1.5rem,3vw,2.1rem);margin:.5rem 0 .5rem}
.finish-sub{color:#C3CFE6;max-width:60ch;margin:0 auto 1.5rem;font-size:.98rem}
.certificate{max-width:620px;margin:0 auto;background:#fff;color:var(--navy);border-radius:14px;padding:2rem 2.2rem;
  box-shadow:var(--shadow-lg);border:1px solid var(--line);text-align:center}
.cert-top{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:1rem}
.cert-logo{width:32px;height:32px}
.cert-brand{font-family:var(--font-display);font-weight:800;color:var(--navy)}
.cert-label{font-family:var(--font-display);font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-size:.72rem;margin:0}
.cert-name{font-family:var(--font-display);font-weight:800;font-size:clamp(1.6rem,4vw,2.4rem);color:var(--blue-deep);
  margin:.5rem auto;border-bottom:2px dashed var(--line-2);padding:0 1rem .3rem;display:inline-block;min-width:240px}
.cert-body{color:var(--text);max-width:46ch;margin:.8rem auto 1.2rem}
.cert-foot{display:flex;justify-content:space-between;color:var(--muted-2);font-size:.8rem;border-top:1px solid var(--line);padding-top:.9rem}
.finish-actions{display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;align-items:center;margin-top:1.4rem}
.finish-actions .capture-input{flex:0 1 280px}

/* instructors */
.meet{margin:2rem 0}
.meet h3,.stories-head h3{font-family:var(--font-display);font-weight:800;font-size:1.15rem;color:var(--navy);margin:0 0 .9rem}
.meet-row{display:flex;flex-wrap:wrap;gap:1rem}
.person{display:inline-flex;align-items:center;gap:.7rem;padding:.7rem .9rem;border:1px solid var(--line);border-radius:14px;background:var(--white);box-shadow:var(--shadow-sm)}
.person-avatar{width:42px;height:42px;border-radius:50%;flex-shrink:0;object-fit:cover}
.person-initials{display:grid;place-items:center;background:var(--grad);color:#fff;font-family:var(--font-display);font-weight:800;font-size:.95rem}
.person-main{display:flex;flex-direction:column;line-height:1.25}
.person-main b{color:var(--navy);font-family:var(--font-display)}
.person-main span{color:var(--muted);font-size:.86rem}
.person-main small{color:var(--muted-2);font-size:.78rem}

/* student stories */
.stories{margin:2rem 0}
.stories-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:.9rem}
.stories-link{font-family:var(--font-display);font-weight:700;font-size:.86rem;color:var(--blue);white-space:nowrap}
.stories-link:hover{color:var(--blue-deep)}
.stories-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:.9rem}
.story-card{display:flex;gap:.7rem;padding:1rem;border:1px solid var(--line);border-radius:14px;background:var(--white);box-shadow:var(--shadow-sm);color:inherit;transition:transform .18s,box-shadow .18s,border-color .18s}
.story-card:not(.no-link):hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--blue-soft)}
.story-card.no-link{cursor:default}
.story-avatar{width:38px;height:38px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;background:var(--sky);color:var(--blue-deep);font-family:var(--font-display);font-weight:800;font-size:.85rem}
.story-photo{object-fit:cover}
.story-main b{color:var(--navy);font-family:var(--font-display);display:block}
.story-switch{font-size:.78rem;color:var(--muted-2);font-weight:600}
.story-switch em{color:var(--blue);font-style:normal}
.story-main p{color:var(--text);font-size:.88rem;margin:.35rem 0 0}

/* reviews section — graduate outcomes, Course Report, YouTube (mirrors the sigmaschool.co popup) */
.reviews{margin:2rem 0}
.rev-group{margin-top:1.2rem}
.rev-grouphead{font-family:var(--font-display);font-weight:700;font-size:.8rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted-2);margin:0 0 .6rem}
/* graduate outcome cards */
.grad-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.9rem}
.grad-card{display:flex;gap:.7rem;align-items:center;padding:.85rem 1rem;border:1px solid var(--line);border-radius:14px;background:var(--white);box-shadow:var(--shadow-sm)}
.grad-photo{width:46px;height:46px;border-radius:50%;flex-shrink:0;object-fit:cover}
.grad-initials{display:grid;place-items:center;background:var(--sky);color:var(--blue-deep);font-family:var(--font-display);font-weight:800;font-size:.9rem}
.grad-main{display:flex;flex-direction:column;line-height:1.25}
.grad-main b{color:var(--navy);font-family:var(--font-display)}
.grad-before{font-size:.74rem;color:var(--muted-2);text-decoration:line-through}
.grad-now{font-size:.82rem;color:var(--text);font-weight:600}
.grad-now em{color:var(--blue);font-style:normal}
/* course report review cards */
.rev-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:.9rem}
.rev-card{margin:0;padding:1rem 1.1rem;border:1px solid var(--line);border-radius:14px;background:var(--white);box-shadow:var(--shadow-sm)}
.rev-top{display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-bottom:.45rem}
.rev-stars{color:#F5A623;letter-spacing:.06em;font-size:.9rem}
.rev-src{font-size:.7rem;font-weight:700;color:var(--muted-2);background:var(--sky);border-radius:999px;padding:.18rem .55rem;white-space:nowrap}
.rev-title{display:block;color:var(--navy);font-family:var(--font-display);font-size:.92rem;margin-bottom:.2rem}
.rev-card blockquote{margin:0;color:var(--text);font-size:.86rem;line-height:1.5}
.rev-card figcaption{margin-top:.55rem;font-size:.8rem;color:var(--muted-2);font-weight:600}
/* youtube story cards */
.yt-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.9rem}
.yt-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--white);box-shadow:var(--shadow-sm);color:inherit;transition:transform .18s,box-shadow .18s,border-color .18s}
.yt-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--blue-soft)}
.yt-thumb{position:relative;display:block;aspect-ratio:16/9;background:#000}
.yt-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.yt-play{position:absolute;inset:0;margin:auto;width:44px;height:44px;display:grid;place-items:center;border-radius:50%;
  background:rgba(52,53,255,.92);color:#fff;font-size:.95rem;padding-left:3px;box-shadow:0 4px 14px rgba(0,0,0,.3)}
.yt-meta{padding:.7rem .85rem;display:flex;flex-direction:column;gap:.15rem}
.yt-meta b{color:var(--navy);font-family:var(--font-display);font-size:.9rem;line-height:1.25}
.yt-meta small{color:var(--muted-2);font-size:.78rem}

/* founder note (on the navy finish screen) */
.founder{display:flex;gap:1rem;align-items:flex-start;max-width:620px;margin:1.4rem auto 0;padding:1.2rem 1.3rem;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:14px;text-align:left}
.founder-avatar{width:44px;height:44px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;background:#fff;color:var(--navy);font-family:var(--font-display);font-weight:800}
.founder-photo{object-fit:cover}
.founder-note{color:#fff;font-size:.96rem;margin:0;line-height:1.55}
.founder-by{color:#9CC0FF;font-size:.84rem;margin:.5rem 0 0}
.founder-by b{color:#fff}

/* certificate claim modal */
.cert-modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:1.2rem}
.cert-modal[hidden]{display:none}
.cert-modal-backdrop{position:absolute;inset:0;background:rgba(11,27,59,.55);backdrop-filter:blur(4px)}
.cert-modal-card{position:relative;width:min(540px,100%);max-height:90vh;overflow-y:auto;background:#fff;border-radius:var(--radius);padding:1.8rem;
  box-shadow:var(--shadow-lg);display:flex;flex-direction:column;gap:.7rem}
.cert-modal-x{position:absolute;top:.6rem;right:.8rem;background:none;border:0;font-size:1rem;color:var(--muted-2);cursor:pointer;line-height:1}
.cert-modal-x:hover{color:var(--navy)}
.cert-modal-card h3{font-family:var(--font-display);font-weight:800;color:var(--navy)}
.cert-modal-card p{color:var(--muted);font-size:.92rem;margin:0 0 .3rem}
.cert-modal-card .capture-input{width:100%}
.cert-modal-err{color:#E5484D;font-size:.85rem;margin:0}
.cert-modal-card .btn{margin-top:.3rem}
.cert-projs{display:flex;flex-direction:column;gap:.55rem;margin-top:.2rem}
.cert-projs-head{font-weight:700;color:var(--navy);font-size:.9rem;margin:0}
.cert-projs-head span{display:block;font-weight:400;color:var(--muted-2);font-size:.78rem}
.cert-proj{display:flex;flex-direction:column;gap:.25rem}
.cert-proj-name{font-size:.82rem;font-weight:600;color:var(--navy)}
.cert-proj-name b{color:#E5484D}
.cert-proj-name em{font-weight:400;font-style:normal;color:var(--muted-2)}
.capture-input.input-bad{border-color:#E5484D;box-shadow:0 0 0 3px #FBE7E7}

@media print{
  body *{visibility:hidden!important}
  #certificate, #certificate *{visibility:visible!important}
  #certificate{position:absolute;left:0;top:0;width:100%;margin:0;box-shadow:none;border:2px solid var(--blue)}
  .promo-bar,.topbar,.sidebar,.gutter,.editor-pane{display:none!important}
}

/* reveal */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}

/* ===================== RESPONSIVE ===================== */
@media (max-width:980px){
  .layout{grid-template-columns:1fr}
  .menu-btn{display:inline-flex}
  .sidebar{position:fixed;top:0;left:0;height:100vh;width:300px;z-index:60;transform:translateX(-100%);
    transition:transform .25s ease;border-right:1px solid var(--line)}
  .sidebar.open{transform:none;box-shadow:var(--shadow-lg)}
  .side-collapse{display:none}
  /* stack the workspace: content, then editor below */
  .lesson-split{display:block;height:auto}
  .gutter{display:none}
  .lesson-content{overflow:visible}
  .lesson-content .lesson-inner{padding:1.6rem 1.2rem 2rem}
  .editor-pane{height:72vh;min-height:420px;border-left:none;border-top:1px solid var(--line)}
  .welcome-cols{grid-template-columns:1fr;gap:1.8rem}
  .next-steps{grid-template-columns:1fr}
}
@media (max-width:560px){
  .lesson-inner{padding:1.6rem 1.2rem 3rem}
  .lesson-foot{gap:.8rem}
  .pager{margin-left:0;width:100%}
  .pager a{flex:1;justify-content:center}
  .topbar{gap:.6rem;padding:0 .9rem}
  .brand-by{display:none}
  .brand{font-size:1.1rem}
  .editor-pane{height:68vh;min-height:380px}
  .editor-hint{display:none}
  .editor-save{font-size:.76rem;padding:.45rem .6rem}
  .editor-head{padding:.5rem .7rem}
  .editor-actions{gap:.7rem}
  .lesson-title{font-size:1.55rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}