/* =========================================================================
   styles.css — shared design system for the whole site.
   Direction: PLAYGROUND — hard shadows, tilted cards, warm cream ground,
   single grotesque typeface. Personality over polish.
   Tokens first; nothing below should hard-code a colour.
   ========================================================================= */

:root{
  /* --- surfaces --- */
  --ground:#FFF6E2;          /* warm cream */
  --surface:#FFFFFF;         /* cards, phone body */
  --surface-2:#FFFDF6;

  /* --- ink --- */
  --ink:#1A1533;             /* deep purple-black, not pure black */
  --ink-2:#4A4463;
  --ink-3:#67607F;           /* 5.5:1 on cream */

  /* --- accents --- */
  --coral:#FF6B4A;           /* fills only — never white text on this */
  --coral-ink:#C6412A;       /* coral as TEXT on cream, 4.7:1 */
  --yellow:#FFD84D;
  --blue:#8FD9FF;
  --pink:#FFB4C8;
  --ink-on-coral:#1A1533;    /* constant across themes */
  --ink-on-yellow:#1A1533;

  /* --- lines & hard shadows --- */
  --line:var(--ink);
  --line-w:3px;
  --shadow-c:var(--ink);
  --shadow-s:3px 3px 0 var(--shadow-c);
  --shadow-m:6px 6px 0 var(--shadow-c);
  --shadow-l:9px 9px 0 var(--shadow-c);

  /* --- geometry --- */
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:100px;

  /* --- motion --- */
  --ease:cubic-bezier(.22,1,.36,1);
  --dur:.26s;

  /* --- layout --- */
  --maxw:1140px;
  --pad:24px;
  --header-h:70px;

  /* --- decoration --- */
  --blob-op:.6;

  /* --- type --- */
  --font:'Space Grotesk','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
}

@media (prefers-color-scheme:dark){
  :root{
    --ground:#141019;
    --surface:#211B29;
    --surface-2:#282032;
    --ink:#FFF6E2;
    --ink-2:#CFC7DE;
    --ink-3:#A79EBF;         /* 7.5:1 on the dark ground */
    --coral:#FF7A5C;
    --coral-ink:#FFA38E;     /* 9.8:1 on the dark ground */
    --line:#FFF6E2;
    --shadow-c:rgba(255,246,226,.25);
    --blob-op:.15;
  }
}

*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font-family:var(--font);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none;margin:0;padding:0}
button{font:inherit;color:inherit}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);position:relative}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid var(--coral-ink);outline-offset:3px;border-radius:6px}

.skip{
  position:absolute;left:var(--pad);top:-60px;z-index:200;
  background:var(--yellow);color:var(--ink-on-yellow);font-weight:700;
  padding:10px 18px;border-radius:var(--r-pill);border:2px solid var(--ink);
  transition:top var(--dur) var(--ease);
}
.skip:focus{top:12px}

/* ============================================================ header ==== */
.site-header{
  position:sticky;top:0;z-index:100;height:var(--header-h);
  background:color-mix(in srgb,var(--ground) 90%,transparent);
  backdrop-filter:saturate(170%) blur(14px);
}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);height:100%;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.logo{font-weight:700;font-size:19px;letter-spacing:-.025em;white-space:nowrap}
.logo span{color:var(--coral-ink)}
.header-right{display:flex;align-items:center;gap:22px}
.nav{display:flex;gap:10px}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:500;color:var(--ink);
  padding:8px 16px;border:2px solid var(--line);border-radius:var(--r-pill);
  background:var(--surface);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.pill:hover{transform:translateY(-2px) rotate(-1.5deg);box-shadow:var(--shadow-s)}
.nav a[aria-current="page"]{background:var(--yellow);color:var(--ink-on-yellow);font-weight:700}
.lang-toggle{display:flex;gap:6px}
.lang-toggle button{
  font-size:12px;font-weight:700;letter-spacing:.04em;color:var(--ink-3);
  background:transparent;border:2px solid transparent;border-radius:var(--r-pill);
  padding:8px 12px;cursor:pointer;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.lang-toggle button[aria-pressed="true"]{background:var(--ink);color:var(--ground)}
.lang-toggle button:hover[aria-pressed="false"]{color:var(--ink);border-color:var(--line)}

/* =============================================================== hero ==== */
.hero{position:relative;padding:clamp(48px,8vw,96px) 0 clamp(40px,6vw,72px);overflow:hidden}
.blob{position:absolute;border-radius:50%;pointer-events:none;opacity:var(--blob-op)}
.blob.b1{width:320px;height:320px;background:var(--yellow);top:-110px;right:96px}
.blob.b2{width:200px;height:200px;background:var(--blue);bottom:24px;left:-70px}
.blob.b3{width:130px;height:130px;background:var(--pink);top:44%;right:-34px}
.blob.b4{width:76px;height:76px;background:var(--coral);bottom:12px;right:26%}

.hero-inner{position:relative;max-width:960px}
.badge{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.01em;
  background:var(--yellow);color:var(--ink-on-yellow);
  padding:8px 16px;border:2px solid var(--line);border-radius:var(--r-pill);
  transform:rotate(-2.2deg);box-shadow:var(--shadow-s);
}
.hero h1{
  font-size:clamp(2.5rem,7.6vw,4.5rem);line-height:1.02;font-weight:700;
  letter-spacing:-.038em;margin:22px 0 0;text-wrap:balance;
}
.hero h1 .u{
  text-decoration:underline;text-decoration-thickness:7px;
  text-decoration-color:var(--yellow);text-underline-offset:7px;
}
.hero h1 .r{
  display:inline-block;background:var(--ink);color:var(--ground);
  padding:0 16px 6px;border-radius:14px;transform:rotate(1.4deg);
}
.hero .lede{font-size:clamp(1.05rem,1.6vw,1.2rem);line-height:1.58;color:var(--ink-2);max-width:46ch;margin:22px 0 0;text-wrap:pretty}
.cta{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14.5px;font-weight:700;padding:12px 24px;
  border-radius:var(--r-pill);border:2px solid var(--line);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn.solid{background:var(--coral);color:var(--ink-on-coral);box-shadow:var(--shadow-s)}
.btn.ghost{background:var(--surface);color:var(--ink)}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-m)}
.btn:active{transform:translateY(0) scale(.98);box-shadow:var(--shadow-s)}

/* =========================================================== sections ==== */
.section{padding:clamp(48px,7vw,88px) 0;position:relative}
.section--tint{background:var(--surface-2)}
.sec-head{margin-bottom:clamp(26px,4vw,42px)}
.kicker{
  display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--coral-ink);
  background:var(--surface);border:2px solid var(--line);border-radius:var(--r-pill);
  padding:6px 14px;transform:rotate(-1.2deg);
}
.sec-head h2{
  font-size:clamp(1.7rem,3.8vw,2.5rem);line-height:1.08;font-weight:700;
  letter-spacing:-.03em;margin:16px 0 0;text-wrap:balance;
}
.sec-head .lede{color:var(--ink-2);max-width:52ch;margin-top:14px;text-wrap:pretty}
.sec-foot{margin-top:clamp(24px,3.5vw,38px)}
.textlink{
  display:inline-flex;align-items:center;gap:9px;font-size:14.5px;font-weight:700;
  border-bottom:3px solid var(--yellow);padding-bottom:3px;
  transition:gap var(--dur) var(--ease),color var(--dur) var(--ease);
}
.textlink:hover{gap:14px;color:var(--coral-ink)}

/* ========================================================= toy cards ==== */
.toys{display:flex;gap:18px;align-items:flex-start;margin-inline:-14px}
.toy{
  flex:1;display:flex;flex-direction:column;
  background:var(--surface);border:var(--line-w) solid var(--line);
  border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow-m);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  overflow:hidden;
}
.toys .toy:nth-child(1){transform:rotate(-1.7deg)}
.toys .toy:nth-child(2){transform:rotate(1.3deg) translateY(14px);flex:1.1}
.toys .toy:nth-child(3){transform:rotate(-.9deg) translateY(5px)}
.toy:hover{transform:rotate(0) translateY(-4px);box-shadow:var(--shadow-l)}
.toy .face{
  width:46px;height:46px;border-radius:14px;margin-bottom:14px;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:20px;color:#fff;background:var(--tint,var(--coral));
}
.toy .shot{
  display:block;aspect-ratio:1024/500;border:0;border-bottom:2px solid var(--line);
  border-radius:0;overflow:hidden;margin:-20px -20px 16px;background:var(--surface-2);
}
.toy .shot img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.toy:hover .shot img{transform:scale(1.04)}
.toy h3{font-size:21px;font-weight:700;letter-spacing:-.025em;line-height:1.15}
.toy .k{font-size:12px;font-weight:500;color:var(--ink-3);margin-top:3px}
.toy .d{font-size:14px;line-height:1.55;color:var(--ink-2);margin-top:11px;flex:1;text-wrap:pretty}
.toy .go{
  display:inline-block;margin-top:13px;font-size:12.5px;font-weight:700;
  border-bottom:3px solid var(--yellow);padding-bottom:2px;
}
.toy:hover .go{color:var(--coral-ink)}

/* =========================================================== marquee ==== */
.marquee{background:var(--ink);color:var(--ground);padding:13px 0;overflow:hidden;white-space:nowrap}
.track{display:inline-flex;animation:slide 28s linear infinite}
.track .seg{display:inline-flex;align-items:center;gap:30px;padding-right:30px;font-weight:700;font-size:14px;letter-spacing:.02em}
.track .seg em{font-style:normal;color:var(--yellow)}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.track{animation:none}}

/* ============================================================= about ==== */
.about{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(32px,5vw,64px);align-items:start}
.about p{color:var(--ink-2);font-size:1.05rem;line-height:1.68;text-wrap:pretty}
.about p+p{margin-top:18px}
.about p strong{color:var(--ink);font-weight:700}
.signature{font-size:1.35rem;font-weight:700;letter-spacing:-.02em;margin-top:26px;display:inline-block;transform:rotate(-1.2deg)}
.skills{display:grid;gap:24px}
.skills dt{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px}
.skills dd{display:flex;flex-wrap:wrap;gap:8px}
.skills dd span{
  font-size:13.5px;font-weight:500;color:var(--ink-on-yellow);
  background:var(--yellow);border:2px solid var(--line);border-radius:var(--r-pill);
  padding:6px 14px;
}
.skills dd span:nth-child(4n+2){background:var(--blue)}
.skills dd span:nth-child(4n+3){background:var(--pink)}
.skills dd span:nth-child(4n){background:var(--coral);color:var(--ink-on-coral)}

/* ========================================================= note cards ==== */
.notecards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.notecard{
  display:flex;flex-direction:column;
  background:var(--surface);border:var(--line-w) solid var(--line);
  border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow-m);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.notecards .notecard:nth-child(odd){transform:rotate(-.9deg)}
.notecards .notecard:nth-child(even){transform:rotate(.8deg)}
.notecard:hover{transform:rotate(0) translateY(-4px);box-shadow:var(--shadow-l)}
.notecard .date{
  font-size:11.5px;font-weight:700;letter-spacing:.06em;
  background:var(--yellow);color:var(--ink-on-yellow);
  border:2px solid var(--line);border-radius:var(--r-pill);
  padding:4px 11px;align-self:flex-start;transform:rotate(-1.6deg);
}
.notecard h3{font-size:1.3rem;font-weight:700;letter-spacing:-.025em;line-height:1.2;margin-top:14px}
.notecard .ex{font-size:14px;line-height:1.55;color:var(--ink-2);margin-top:10px;flex:1;text-wrap:pretty}
.notecard .tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}
.notecard .tags span{
  font-size:11px;font-weight:500;color:var(--ink-3);
  border:2px solid var(--line);border-radius:var(--r-pill);padding:3px 10px;
}
.notecard .rm{font-size:12.5px;font-weight:700;margin-top:14px;color:var(--coral-ink)}

/* ===================================================== app rows (apps) ==== */
.approw{
  display:grid;grid-template-columns:290px 1fr;gap:clamp(30px,5vw,64px);
  align-items:center;padding:clamp(36px,5vw,64px) 0;
}
.approw+.approw{border-top:3px dashed color-mix(in srgb,var(--ink) 22%,transparent)}
/* flip row: phone on the right, text on the left (explicit placement keeps
   the text in the wide 1fr column — order alone would swap the columns) */
.approw.flip{grid-template-columns:1fr 290px}
.approw.flip .appshot{grid-column:2;grid-row:1}
.approw.flip .appinfo{grid-column:1;grid-row:1}
.appshot{position:relative;display:flex;justify-content:center}
.approw:nth-child(odd) .phone{transform:rotate(-2deg)}
.approw:nth-child(even) .phone{transform:rotate(2deg)}
.approw.flip:nth-child(odd) .phone{transform:rotate(2deg)}
.approw.flip:nth-child(even) .phone{transform:rotate(-2deg)}
.phone{
  width:252px;aspect-ratio:9/16;border-radius:30px;padding:8px;position:relative;
  background:var(--surface);border:var(--line-w) solid var(--line);box-shadow:var(--shadow-m);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.approw:hover .phone{transform:rotate(0) translateY(-5px);box-shadow:var(--shadow-l)}
.phone-screen{
  height:100%;border-radius:22px;overflow:hidden;position:relative;
  background:color-mix(in srgb,var(--tint) 22%,var(--surface));
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:22px;
}
.phone-screen img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.phone-screen .initial{font-weight:700;font-size:58px;color:color-mix(in srgb,var(--tint) 80%,var(--ink));line-height:1}
.phone-screen .ph-name{font-size:14px;font-weight:700}
.phone-screen .ph-note{
  font-size:10.5px;font-weight:500;color:var(--ink-3);
  border:2px dashed var(--line);border-radius:var(--r-sm);padding:5px 10px;
}
.app-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase;
  border:2px solid var(--line);border-radius:var(--r-pill);padding:6px 13px;background:var(--surface);
}
.app-tag .dot{width:9px;height:9px;border-radius:50%;background:var(--tint,var(--coral))}
.approw h2{font-size:clamp(1.7rem,3.6vw,2.4rem);font-weight:700;letter-spacing:-.03em;line-height:1.08;margin-top:16px;text-wrap:balance}
.approw .sub{font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--coral-ink);margin-top:10px}
.approw .desc{color:var(--ink-2);font-size:1.05rem;line-height:1.66;max-width:46ch;margin-top:16px;text-wrap:pretty}
.app-feats{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.app-feats span{
  font-size:13px;font-weight:500;color:var(--ink-on-yellow);
  background:var(--yellow);border:2px solid var(--line);border-radius:var(--r-pill);padding:5px 13px;
}
.app-feats span:nth-child(2){background:var(--blue)}
.app-feats span:nth-child(3){background:var(--pink)}
/* feature graphic banner (landscape promo art) at the top of each app row */
.app-feature{
  display:block;max-width:560px;margin:0 0 22px;
  border:var(--line-w) solid var(--line);border-radius:var(--r-md);
  overflow:hidden;background:var(--surface);box-shadow:var(--shadow-m);
  transform:rotate(-1.2deg);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.app-feature img{display:block;width:100%;aspect-ratio:1024/500;object-fit:cover}
.approw:hover .app-feature{transform:rotate(0)}
/* landing page + Google Play buttons */
.app-links{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:22px}

/* ========================================================= page heads ==== */
.page-head{position:relative;padding:clamp(44px,7vw,88px) 0 clamp(26px,4vw,44px);overflow:hidden}
.page-head .blob.b1{top:-130px}
.page-head h1{font-size:clamp(2.2rem,6.4vw,3.8rem);line-height:1.04;font-weight:700;letter-spacing:-.035em;margin-top:20px;text-wrap:balance}
.page-head .lede{font-size:clamp(1.02rem,1.5vw,1.15rem);line-height:1.58;color:var(--ink-2);max-width:50ch;margin-top:18px;text-wrap:pretty}
.page-head .count{display:inline-block;margin-top:20px}

/* ========================================================== post page ==== */
.article{padding:clamp(36px,5.5vw,72px) 0}
.backlink{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  background:var(--surface);border:2px solid var(--line);border-radius:var(--r-pill);
  padding:8px 16px;box-shadow:var(--shadow-s);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.backlink:hover{transform:translateY(-2px);box-shadow:var(--shadow-m)}
.post-meta{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0 0}
.post-meta span{
  font-size:11.5px;font-weight:700;letter-spacing:.04em;
  background:var(--surface);border:2px solid var(--line);border-radius:var(--r-pill);padding:5px 12px;
}
.post-meta span:first-child{background:var(--yellow);color:var(--ink-on-yellow)}
.article h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.06;font-weight:700;letter-spacing:-.035em;margin-top:20px;max-width:22ch;text-wrap:balance}
.article-inner{max-width:720px}
.post-body{margin-top:32px}
.post-body p{color:var(--ink-2);font-size:1.1rem;line-height:1.75;text-wrap:pretty}
.post-body p+p{margin-top:20px}
.post-body h2{font-size:1.5rem;font-weight:700;letter-spacing:-.025em;margin:40px 0 14px}
.post-body blockquote{
  background:var(--yellow);border:var(--line-w) solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-s);padding:20px 22px;margin:30px 0;
  font-size:1.25rem;font-weight:700;line-height:1.4;letter-spacing:-.02em;color:var(--ink-on-yellow);
  transform:rotate(-.6deg);
}
.article-tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:40px}
.article-tags span{
  font-size:12px;font-weight:500;color:var(--ink-3);
  border:2px solid var(--line);border-radius:var(--r-pill);padding:4px 12px;
}
.sample-note{font-size:12px;font-weight:500;color:var(--ink-3);margin-top:26px}
.empty{color:var(--ink-3);font-size:15px;font-weight:500;padding:40px 0}

/* ============================================================ footer ==== */
.site-footer{background:var(--ink);color:var(--ground);padding:clamp(44px,6vw,76px) 0 32px;margin-top:clamp(32px,5vw,64px)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:38px}
.footer-wordmark{font-size:clamp(1.7rem,3.6vw,2.4rem);font-weight:700;letter-spacing:-.03em;line-height:1.12;margin-bottom:14px;text-wrap:balance}
.footer-grid h4{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:color-mix(in srgb,var(--ground) 62%,transparent);margin-bottom:16px}
.footer-grid ul{display:grid;gap:11px}
.footer-grid a,.footer-grid p{font-size:14.5px;color:color-mix(in srgb,var(--ground) 84%,transparent);transition:color var(--dur) var(--ease)}
.footer-grid a:hover{color:var(--yellow)}
.footer-note{
  margin-top:48px;padding-top:20px;
  border-top:2px dashed color-mix(in srgb,var(--ground) 32%,transparent);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;font-weight:500;color:color-mix(in srgb,var(--ground) 62%,transparent);
}

/* ============================================================ reveal ==== */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ======================================================== responsive ==== */
@media (max-width:900px){
  .about{grid-template-columns:1fr;gap:36px}
  .toys{flex-direction:column;align-items:stretch;margin-inline:0}
  .toys .toy:nth-child(n){transform:none}
  .approw{grid-template-columns:1fr;gap:26px;justify-items:start}
  .approw.flip{grid-template-columns:1fr}
  .approw.flip .appshot,.approw.flip .appinfo{grid-column:1;grid-row:auto}
  .approw:nth-child(n) .phone{transform:rotate(-1.5deg)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:640px){
  body{font-size:16px}
  :root{--pad:20px;--header-h:62px;--line-w:2px}
  .header-right{gap:10px}
  .nav{gap:6px}
  .pill{font-size:12px;padding:7px 12px}
  .lang-toggle button{font-size:11px;padding:7px 9px}
  .hero h1 .r{padding:0 10px 4px;border-radius:10px}
  .notecards{grid-template-columns:1fr}
  .notecards .notecard{transform:none}
  .phone{width:min(252px,72vw)}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:380px){
  .nav{gap:4px}
  .pill{font-size:11.5px;padding:6px 10px}
  .logo{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .pill,.toy,.btn,.notecard,.backlink,.phone{text-transform:none;transition:none}
}