/* ============================================================
   The Perfect Focus Challenge — re-skinned to match Sherry's Challenge
   Calm greige + sage, serif display + system sans, light/dark.
   ============================================================ */

:root{
  --bg:#f2f0ea; --panel:#fbfaf6; --ink:#2b2924; --text:#2b2924; --muted:#8c877d; --faint:#b6b1a6;
  --line:#e7e3d9; --line2:#dcd7ca;
  --accent:#6f8e69; --accent-ink:#4f6b4a; --accent-soft:#e5ebe0; --accent-dim:#5c7a56;
  --clay:#b08a52; --slate:#6f8aa3;
  --surface:#fbfaf6; --surface-2:#f4f1ea; --bg-2:#efece4;
  --shadow:0 1px 2px rgba(43,41,36,.03);
  --radius:16px; --radius-sm:12px; --maxw:1080px;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,ui-serif,serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#1a1917; --panel:#232019; --ink:#ece7dd; --text:#ece7dd; --muted:#9b968b; --faint:#6a655c;
    --line:#312d26; --line2:#3b362d;
    --accent:#8db187; --accent-ink:#aecaa8; --accent-soft:#2a3327; --accent-dim:#7c9b76;
    --clay:#c8a06a; --slate:#8aa4bb;
    --surface:#232019; --surface-2:#2b2721; --bg-2:#201d18;
    --shadow:0 1px 2px rgba(0,0,0,.25);
  }
}
:root[data-theme="light"]{
  --bg:#f2f0ea; --panel:#fbfaf6; --ink:#2b2924; --text:#2b2924; --muted:#8c877d; --faint:#b6b1a6;
  --line:#e7e3d9; --line2:#dcd7ca; --accent:#6f8e69; --accent-ink:#4f6b4a; --accent-soft:#e5ebe0;
  --accent-dim:#5c7a56; --clay:#b08a52; --slate:#6f8aa3;
  --surface:#fbfaf6; --surface-2:#f4f1ea; --bg-2:#efece4; --shadow:0 1px 2px rgba(43,41,36,.03);
}
:root[data-theme="dark"]{
  --bg:#1a1917; --panel:#232019; --ink:#ece7dd; --text:#ece7dd; --muted:#9b968b; --faint:#6a655c;
  --line:#312d26; --line2:#3b362d; --accent:#8db187; --accent-ink:#aecaa8; --accent-soft:#2a3327;
  --accent-dim:#7c9b76; --clay:#c8a06a; --slate:#8aa4bb;
  --surface:#232019; --surface-2:#2b2721; --bg-2:#201d18; --shadow:0 1px 2px rgba(0,0,0,.25);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans); background:var(--bg); color:var(--ink);
  line-height:1.6; -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.12;letter-spacing:-.01em}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent-soft)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.eyebrow{display:inline-block;font-family:var(--sans);font-weight:600;letter-spacing:.16em;text-transform:uppercase;font-size:.72rem;color:var(--accent-ink);margin-bottom:12px}
.section-title{font-size:clamp(1.5rem,3.2vw,2.1rem);margin-bottom:8px}
.section-sub{color:var(--muted);max-width:640px;margin-bottom:32px;font-size:1rem}
section{padding:64px 0}

/* ---------- shared header ---------- */
.topbar{position:sticky;top:0;z-index:60;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:62px;gap:14px}
.brand{display:flex;align-items:center;gap:8px;font-family:var(--serif);font-size:17px;font-weight:600;letter-spacing:.01em}
.brand .leaf{font-size:16px}
.topbar-right{display:flex;align-items:center;gap:18px}
.topnav{display:flex;gap:20px;font-size:.9rem;color:var(--muted)}
.topnav a{transition:color .15s}
.topnav a:hover{color:var(--ink)}
.theme-btn{cursor:pointer;border:1px solid var(--line2);background:var(--panel);color:var(--muted);font:inherit;font-size:12.5px;padding:6px 12px;border-radius:999px;display:inline-flex;gap:6px;align-items:center}
.theme-btn:hover{color:var(--ink);border-color:var(--muted)}
@media (max-width:640px){ .topnav{display:none} }

/* ---------- buttons ---------- */
.btn{font-family:var(--sans);font-weight:600;font-size:.95rem;padding:12px 22px;border-radius:11px;cursor:pointer;border:1px solid transparent;transition:filter .15s,transform .05s,border-color .15s,background .15s;display:inline-flex;align-items:center;gap:8px}
.btn-primary{background:var(--accent);color:#fff}
:root[data-theme="dark"] .btn-primary{color:#141a0f}
@media (prefers-color-scheme:dark){.btn-primary{color:#141a0f}}
:root[data-theme="light"] .btn-primary{color:#fff}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-ghost{background:var(--panel);color:var(--ink);border-color:var(--line2)}
.btn-ghost:hover{border-color:var(--muted);transform:translateY(-1px)}

/* ---------- hero ---------- */
.hero{padding:52px 0 30px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem)}
.hero h1 .glow{color:var(--accent-ink)}
.hero p.lead{color:var(--muted);font-size:1.08rem;margin:16px 0 26px;max-width:520px}
.hero p.lead em{color:var(--ink);font-style:italic}
.meta-chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 15px;min-width:128px}
.chip span{display:block;font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600}
.chip strong{font-family:var(--sans);font-size:.98rem;font-weight:600}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}

.hero-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero-card .lamp{font-size:2.4rem}
.hero-card h3{font-family:var(--serif);font-size:1.3rem;margin:12px 0 6px}
.hero-card p{color:var(--muted);font-size:.95rem}
.hero-card a{color:var(--accent-ink);text-decoration:underline;text-underline-offset:2px}
.mini-stats{display:flex;gap:10px;margin-top:24px}
.mini-stat{flex:1;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.mini-stat b{font-family:var(--serif);font-size:1.5rem;color:var(--accent-ink);display:block;font-variant-numeric:tabular-nums}
.mini-stat small{color:var(--muted);font-size:.72rem;letter-spacing:.04em}

/* ---------- study-along ---------- */
.watch-section{background:var(--surface-2)}
.watch-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:24px;align-items:start}
.player-frame{position:relative;width:100%;aspect-ratio:16/9;border-radius:14px;overflow:hidden;border:1px solid var(--line2);background:#000;box-shadow:var(--shadow)}
.player-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.player-poster{position:absolute;inset:0;background-size:cover;background-position:center;cursor:pointer;display:grid;place-items:center}
.player-poster::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.1),rgba(0,0,0,.5));transition:background .2s}
.player-poster:hover::after{background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.4))}
.play-btn{position:relative;z-index:2;width:68px;height:68px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:1.5rem;padding-left:4px;border:none;cursor:pointer;box-shadow:0 8px 26px rgba(0,0,0,.35);transition:transform .16s}
.player-poster:hover .play-btn{transform:scale(1.08)}
.player-caption{margin-top:12px;color:var(--muted);font-size:.9rem}
.player-caption b{color:var(--accent-ink)}
.player-yt-link{display:inline-block;margin-top:4px;color:var(--accent-ink);font-size:.85rem;text-decoration:underline;text-underline-offset:2px}
.session-list{display:flex;flex-direction:column;gap:10px;max-height:470px;overflow-y:auto;padding-right:4px}
.session-item{text-align:left;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;cursor:pointer;font-family:var(--sans);color:var(--ink);transition:border-color .16s,transform .16s}
.session-item:hover{border-color:var(--accent);transform:translateY(-2px)}
.session-item.active{border-color:var(--accent);background:var(--accent-soft)}
.si-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:5px}
.si-title{font-weight:600;font-size:.95rem}
.si-tag{font-size:.6rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-ink);border:1px solid var(--accent);border-radius:20px;padding:3px 9px;white-space:nowrap}
.si-desc{color:var(--muted);font-size:.83rem;line-height:1.5}
.watch-foot{margin-top:24px}

/* ---------- tracker ---------- */
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:30px}
.stat-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px}
.stat-card b{font-family:var(--serif);font-size:2rem;color:var(--ink);display:block;line-height:1;font-variant-numeric:tabular-nums}
.stat-card span{color:var(--muted);font-size:.85rem}
.progressbar{height:8px;background:var(--line);border-radius:20px;overflow:hidden;margin-top:14px}
.progressbar>i{display:block;height:100%;width:0;background:var(--accent);transition:width .5s ease;border-radius:20px}
.day-strip{display:grid;grid-template-columns:repeat(15,1fr);gap:8px}
.day-dot{aspect-ratio:1;border-radius:9px;border:1.5px solid var(--line2);background:var(--panel);color:var(--muted);font-family:var(--sans);font-weight:600;font-size:.8rem;cursor:pointer;display:grid;place-items:center;transition:transform .12s,border-color .12s,background .12s;user-select:none;font-variant-numeric:tabular-nums}
.day-dot:hover{border-color:var(--accent);color:var(--ink);transform:translateY(-2px)}
.day-dot.done{background:var(--accent);border-color:var(--accent);color:#fff}
:root[data-theme="dark"] .day-dot.done{color:#141a0f}
@media (prefers-color-scheme:dark){.day-dot.done{color:#141a0f}}
:root[data-theme="light"] .day-dot.done{color:#fff}
.day-dot.today{box-shadow:0 0 0 2px var(--accent-soft);border-color:var(--accent);color:var(--accent-ink)}

/* ---------- plan ---------- */
.week-label{display:flex;align-items:center;gap:14px;margin:36px 0 16px}
.week-label h3{font-size:1.1rem;white-space:nowrap}
.week-label .bar{flex:1;height:1px;background:var(--line2)}
.week-label .theme{color:var(--faint);font-size:.8rem;letter-spacing:.04em}
.plan-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.day-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);padding:17px;cursor:pointer;transition:transform .16s,border-color .16s;position:relative;overflow:hidden}
.day-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.day-card.done{border-color:var(--accent);background:var(--accent-soft)}
.day-card.rest{border-style:dashed}
.day-card .dhead{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:8px}
.day-card .dnum{font-family:var(--serif);font-weight:600;font-size:1.05rem}
.day-card .dnum small{color:var(--faint);font-weight:500;font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;font-family:var(--sans)}
.day-card .sessions{color:var(--accent-ink);font-weight:600;font-size:.88rem}
.day-card .tech{color:var(--ink);font-weight:600;font-size:.95rem;margin-bottom:4px}
.day-card .tdesc{color:var(--muted);font-size:.82rem}
.day-card .check{position:absolute;top:14px;right:14px;width:22px;height:22px;border-radius:7px;border:1.5px solid var(--line2);display:grid;place-items:center;font-size:.8rem;color:transparent;transition:all .16s}
.day-card.done .check{background:var(--accent);border-color:var(--accent);color:#fff}
:root[data-theme="dark"] .day-card.done .check{color:#141a0f}
@media (prefers-color-scheme:dark){.day-card.done .check{color:#141a0f}}
:root[data-theme="light"] .day-card.done .check{color:#fff}
.day-card.rest .sessions{color:var(--faint)}

/* ---------- tips ---------- */
.tips-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.tip-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.tip-card h3{display:flex;align-items:center;gap:10px;font-size:1.2rem;margin-bottom:14px}
.tip-card ul{list-style:none;display:grid;gap:11px}
.tip-card li{color:var(--muted);font-size:.92rem;padding-left:24px;position:relative}
.tip-card li::before{content:"→";position:absolute;left:0;color:var(--accent-ink)}
.tip-card.easier{border-top:3px solid var(--accent)}
.tip-card.harder{border-top:3px solid var(--clay)}

/* ---------- CTA ---------- */
.stream-cta{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:44px;text-align:center;box-shadow:var(--shadow)}
.stream-cta h2{font-size:clamp(1.5rem,3.5vw,2.1rem);margin-bottom:10px}
.stream-cta p{color:var(--muted);max-width:560px;margin:0 auto 24px}
.stream-links{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:34px 0;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;font-size:.85rem}
footer strong{color:var(--ink);font-weight:600}
footer a{color:var(--muted);text-decoration:underline;text-underline-offset:2px}
footer a:hover{color:var(--accent-ink)}

/* ---------- toast ---------- */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(120px);background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:11px;box-shadow:0 8px 30px rgba(0,0,0,.18);z-index:90;transition:transform .3s cubic-bezier(.2,.9,.3,1.2);font-size:.92rem;font-weight:500}
.toast.show{transform:translateX(-50%) translateY(0)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .watch-grid{grid-template-columns:1fr;gap:20px}
  .session-list{max-height:none}
  .tips-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:1fr}
  .day-strip{grid-template-columns:repeat(10,1fr)}
}
@media (max-width:520px){
  section{padding:48px 0}
  .stream-cta{padding:28px}
  .day-strip{grid-template-columns:repeat(6,1fr)}
  .meta-chips .chip{min-width:calc(50% - 5px);flex:1}
}