/* Hallmark · theme: Seline (by request) · deal: seline.com study · genre: modern-minimal · surface: absolute · copy: repositioned ambitious-grounded AI studio · hero: stage · nav: brand+studio+contact+say-hi · footer: copyright+4 links+mark · host: BK mini-me olive bomber CSS idle */
/* Hallmark · pre-emit critique: P4 H4 E4 S4 R4 V3 · weakest: V, kept Seline stage+mascot signature from prior mock rather than invent a new shell */
/* Hallmark · waive 7b · paper is absolute white on stone canvas · Seline study uses white cards on stone */
:root {
  --canvas: #fafaf9;
  --paper: #ffffff;
  --ink: #0c0a09;
  --mute: #78716c;
  --border: #d6d3d1;
  --wash: #e7e5e4;
  --chrome: #f5f5f4;
  --on-accent: #fff8f6;
  --accent: #E8442B;
  --accent-dark: #b83420;
  --accent-press: #9a2b1a;
  --shadow-soft: 0 1px 2px rgba(28, 25, 23, 0.06);
  --shadow-card: 0 1px 2px rgba(28, 25, 23, 0.04), 0 12px 32px rgba(28, 25, 23, 0.06);
  --shadow-btn: inset 0 1px 0 rgba(255, 248, 246, 0.28), inset 0 -2px 1px rgba(184, 52, 32, 0.18), 0 1px 2px rgba(28, 25, 23, 0.12);
  --shadow-btn-active: inset 0 1px 2px rgba(28, 25, 23, 0.22);
  --shadow-mascot: drop-shadow(0 10px 18px rgba(28, 25, 23, 0.14));
  --pad: clamp(1.25rem, 4vw, 2.25rem); /* 20px floor on mobile */
  --max: 68rem;
  --measure: 40rem;
  --sans: ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius: 0.75rem;
}
* { box-sizing: border-box; margin: 0; }
html, body { overflow-x: clip; }
html { background: var(--canvas); color: var(--ink); }
body {
  font: 400 1rem/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: max(var(--pad), env(safe-area-inset-left, 0px));
  padding-right: max(var(--pad), env(safe-area-inset-right, 0px));
  width: 100%;
  box-sizing: border-box;
}
main { flex: 1 0 auto; }

.nav {
  display: flex; justify-content: space-between; align-items: center;
  padding-block: 1.1rem; gap: 0.75rem;
  min-width: 0;
}
.brand {
  display: flex; align-items: center; gap: 0.55rem;
  font-weight: 600; letter-spacing: -0.02em;
  min-width: 0; flex: 0 1 auto;
}
.brand span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-mark { width: 1.5rem; height: 1.5rem; flex-shrink: 0; }
.nav-actions {
  display: flex; align-items: center; gap: 0.75rem;
  flex: 0 0 auto; flex-wrap: nowrap; justify-content: flex-end;
}
.nav-link { font-size: 0.9rem; color: var(--mute); }
.nav-link:hover { color: var(--accent); }
.nav-link[aria-current="page"] { color: var(--ink); font-weight: 500; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 2.35rem; padding: 0 1rem; border-radius: 999px;
  font-size: 0.9rem; font-weight: 500;
  background: var(--accent-dark); color: var(--on-accent);
  box-shadow: var(--shadow-btn);
}
.btn:hover { background: var(--accent-press); }
.btn:active { background: var(--accent-press); box-shadow: var(--shadow-btn-active); }
.btn-ghost:active { background: var(--wash); }
.btn-ghost {
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}
.btn-ghost:hover { border-color: var(--ink); }

.hero { padding-block: clamp(2rem, 6vw, 3.5rem) 1.5rem; text-align: center; }
.hero h1,
.page-hero h1 {
  font-weight: 600;
  font-size: clamp(2.1rem, 6.5vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  max-width: 14ch;
  margin: 0 auto;
  overflow-wrap: break-word;
  min-width: 0;
  text-wrap: balance;
}
.page-hero { padding-block: clamp(2rem, 6vw, 3rem) 0.5rem; text-align: left; }
.page-hero h1 { margin: 0; max-width: 18ch; text-align: left; }
.lede { margin: 1.1rem auto 0; max-width: 42ch; color: var(--mute); font-size: clamp(1rem, 1.6vw, 1.125rem); }
.page-hero .lede { margin-left: 0; }
.zh { margin-top: 0.75rem; color: var(--mute); letter-spacing: 0.14em; font-size: 0.95rem; }
.text-action {
  display: inline-flex; align-items: center; height: 2.35rem;
  font-size: 0.95rem; font-weight: 500; color: var(--mute);
}
.text-action:hover { color: var(--accent); }
.actions { margin-top: 1.6rem; display: flex; gap: 0.65rem; justify-content: center; flex-wrap: wrap; align-items: center; }
.page-hero .actions { justify-content: flex-start; }

.stage {
  position: relative;
  margin: clamp(2.75rem, 7vw, 4rem) auto 0;
  max-width: 52rem;
  --mascot-w: clamp(9rem, 24vw, 13rem);
  --mascot-h: calc(var(--mascot-w) * 444 / 399);
  --forearm: 0.78;
  --hang: calc(var(--mascot-h) * (1 - var(--forearm)));
  padding-top: calc(var(--mascot-h) * var(--forearm));
}
.card {
  position: relative; z-index: 1;
  background: var(--paper);
  border: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  border-radius: calc(var(--radius) + 0.15rem);
  box-shadow: var(--shadow-card);
  overflow: visible;
  min-height: 14rem;
}
.card-inner {
  border-radius: inherit;
  overflow: clip;
  background: var(--paper);
}
.card-top {
  height: 2.6rem;
  border-bottom: 1px solid var(--wash);
  background: var(--chrome);
}
.card-body {
  padding: clamp(1.25rem, 3vw, 2rem);
  padding-top: max(clamp(1.5rem, 3vw, 2rem), calc(var(--hang) - 2.4rem + 1.25rem));
  text-align: left;
}
.card-body h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  letter-spacing: -0.03em;
  font-weight: 600;
  overflow-wrap: break-word;
  min-width: 0;
  text-wrap: balance;
}
.card-body p { margin-top: 0.75rem; color: var(--mute); max-width: 48ch; }
.card-body p + p { margin-top: 0.6rem; }
.card-note { margin-top: 1.25rem; font-size: 0.85rem; color: var(--ink); font-weight: 500; }
.card-link {
  color: var(--accent); font-weight: 500; text-decoration: underline;
  text-underline-offset: 0.15em; text-decoration-thickness: 1px;
}
.card-link:hover { color: var(--accent-dark); }
.strong { color: var(--ink); font-weight: 600; }

.mascot {
  position: absolute;
  z-index: 3;
  right: clamp(0.5rem, 4vw, 3rem);
  top: 0;
  width: var(--mascot-w);
  aspect-ratio: 399 / 444;
  filter: var(--shadow-mascot);
  pointer-events: none;
  transform: none;
}
.mascot-layer {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  background-repeat: no-repeat;
  background-size: 100% 100%;
  background-position: center;
}
.mascot-body { background-image: url("assets/mascot-body.webp"); z-index: 1; }
.mascot-arm {
  background-image: url("assets/mascot-arm.webp");
  z-index: 2;
  transform-origin: 35.95% 77.23%;
  animation: arm-sway 3.6s ease-in-out infinite;
}
.mascot-head {
  background-image: url("assets/mascot-head.webp");
  z-index: 3;
  transform-origin: 54.41% 35.52%;
  animation: head-tilt 3.6s ease-in-out infinite;
}
.mascot-blink {
  background-image: url("assets/mascot-head-blink.webp");
  z-index: 4;
  transform-origin: 54.41% 35.52%;
  opacity: 0;
  animation: head-tilt 3.6s ease-in-out infinite, blink 3.6s ease-in-out infinite;
}

@keyframes head-tilt {
  0%, 100% { transform: rotate(-1.2deg); }
  50% { transform: rotate(2.4deg); }
}
@keyframes arm-sway {
  0%, 100% { transform: rotate(0deg) translateY(0); }
  40% { transform: rotate(3.5deg) translateY(1px); }
  70% { transform: rotate(-2deg) translateY(0); }
}
@keyframes blink {
  0%, 38%, 46%, 100% { opacity: 0; }
  40%, 44% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .mascot-arm, .mascot-head, .mascot-blink { animation: none; }
  .mascot-blink { opacity: 0; }
}

@media (max-width: 720px) {
  .nav-actions .btn { display: none; }
}
@media (max-width: 640px) {
  :root { --pad: 1.25rem; } /* solid 20px gutters */
  .stage { --mascot-w: clamp(8rem, 42vw, 10.5rem); }
  .mascot { right: clamp(0.15rem, 2vw, 0.75rem); left: auto; transform: none; }
  .nav { gap: 0.5rem; }
  .nav-actions { gap: 0.85rem; }
  .brand { font-size: 0.95rem; }
  .page-hero h1 { max-width: none; }
}

/* Studio host: smaller peeking mini-me (sits in padding, hangs into panel) */
.studio-host {
  position: relative;
  margin-top: 0.35rem;
  --sm-w: clamp(5.25rem, 26vw, 7.5rem);
  --sm-h: calc(var(--sm-w) * 444 / 399);
  padding-top: calc(var(--sm-h) * 0.72);
}
.studio-host .sec-panel { position: relative; z-index: 1; }
.studio-mascot {
  position: absolute;
  z-index: 2;
  top: 0;
  right: clamp(0.5rem, 4vw, 1.5rem);
  width: var(--sm-w);
  aspect-ratio: 399 / 444;
  pointer-events: none;
  filter: var(--shadow-mascot);
}

.sec { padding-block: clamp(2.5rem, 7vw, 4.5rem); }
.sec-panel {
  background: var(--wash);
  border-radius: calc(var(--radius) + 0.25rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}
.sec h2,
.panel h2 {
  font-weight: 600;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  letter-spacing: -0.03em;
  overflow-wrap: break-word;
  min-width: 0;
  text-wrap: balance;
}
.big { margin-top: 0.9rem; max-width: 48ch; color: var(--mute); font-size: clamp(1.05rem, 2vw, 1.2rem); line-height: 1.45; }
.note { margin-top: 1.1rem; font-size: 0.95rem; font-weight: 500; color: var(--ink); }

.stack { display: grid; gap: 1rem; margin-top: 1.5rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 720px) {
  .stack.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.tile {
  background: var(--paper);
  border: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow-soft);
}
.tile h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.02em; }
.tile p { margin-top: 0.45rem; color: var(--mute); font-size: 0.95rem; max-width: 48ch; }

.mail {
  display: inline-block;
  margin-top: 1.25rem;
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1.5px;
}
.mail:hover { color: var(--accent-dark); }

.legal {
  max-width: var(--measure);
  padding-block: clamp(1.5rem, 5vw, 2.5rem) clamp(3rem, 8vw, 5rem);
}
.legal h1 {
  font-weight: 600;
  font-size: clamp(1.85rem, 5vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  overflow-wrap: break-word;
  min-width: 0;
  text-wrap: balance;
}
.legal .lede { margin: 0.9rem 0 0; max-width: 42ch; }
.legal section { margin-top: 2rem; }
.legal h2 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.45rem;
}
.legal p { color: var(--mute); max-width: 48ch; }
.legal p + p { margin-top: 0.75rem; }
.legal a { color: var(--accent); text-decoration: underline; text-underline-offset: 0.15em; }
.legal a:hover { color: var(--accent-dark); }
.legal .note { margin-top: 2.5rem; color: var(--mute); font-weight: 400; font-size: 0.85rem; }

.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.25rem;
  padding-block: 1.5rem 2rem;
  color: var(--mute);
  font-size: 0.85rem;
  border-top: 1px solid var(--wash);
  margin-top: auto;
}
.foot a:hover { color: var(--accent); }
.foot .brand-mark { width: 1.15rem; height: 1.15rem; margin-left: auto; color: var(--ink); }