/*
 * Sakuga — design tokens + component styles.
 * "Exposure sheet" editorial layout: corner-bracket framing marks
 * (borrowed from a real camera viewfinder/storyboard field guide),
 * cut-numbered section rules, warm cel-paper palette.
 */

/* ---------- tokens ---------- */
:root {
	--sk-paper:        #f4ede0;
	--sk-paper-2:      #ece1cb;
	--sk-ink:          #201b16;
	--sk-ink-2:        #56493a;
	--sk-line:         rgba(32, 27, 22, 0.14);
	--sk-line-strong:  rgba(32, 27, 22, 0.28);
	--sk-vermillion:      #c23b2a;
	--sk-vermillion-deep: #9c2e21;
	--sk-pencil:       #4f7ea8;
	--sk-pencil-bright:#7aa8cf;

	--sk-serif: 'Shippori Mincho', Georgia, 'Times New Roman', serif;
	--sk-sans:  'Zen Kaku Gothic New', -apple-system, 'Segoe UI', sans-serif;
	--sk-mono:  'Fragment Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

	/* base 18px, ratio 1.25 */
	--fs--1: 0.8rem;
	--fs-0:  1rem;
	--fs-1:  1.25rem;
	--fs-2:  1.5625rem;
	--fs-3:  1.953rem;
	--fs-4:  2.44rem;
	--fs-5:  3.05rem;
	--fs-6:  3.8rem;

	--sk-unit: 8px;
	--sk-radius: 2px;
	--sk-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
	--sk-shadow: 0 1px 2px rgba(32, 27, 22, 0.08), 0 14px 32px -18px rgba(32, 27, 22, 0.32);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { list-style: none; margin: 0; padding: 0; }
img, picture { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
	*, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------- base ---------- */
html { font-size: 18px; }
body {
	font-family: var(--sk-sans);
	background: var(--sk-paper);
	color: var(--sk-ink);
	line-height: 1.6;
	font-size: var(--fs-0);
}
main:focus { outline: none; }

.wrap {
	max-width: 1240px;
	margin-inline: auto;
	padding-inline: clamp(20px, 4vw, 48px);
}

h1, h2, h3, h4 {
	font-family: var(--sk-serif);
	font-weight: 600;
	line-height: 1.15;
	color: var(--sk-ink);
	text-wrap: balance;
	letter-spacing: -0.005em;
}
h1 { font-size: var(--fs-4); }
h2 { font-size: var(--fs-3); }
h3 { font-size: var(--fs-2); }
h4 { font-size: var(--fs-1); font-family: var(--sk-sans); font-weight: 700; letter-spacing: 0; }
@media (min-width: 900px) { h1 { font-size: var(--fs-5); } }

p { max-width: 62ch; }
.measure-wide { max-width: 74ch; }

.lede { font-size: var(--fs-1); font-family: var(--sk-serif); color: var(--sk-ink-2); }

.kicker {
	font-family: var(--sk-mono);
	font-size: var(--fs--1);
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--sk-vermillion);
}

.btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	font-family: var(--sk-mono);
	font-size: var(--fs--1);
	letter-spacing: 0.06em;
	text-transform: uppercase;
	padding: 14px 22px;
	border: 1px solid var(--sk-ink);
	border-radius: var(--sk-radius);
	background: transparent;
	transition: background-color 220ms var(--sk-ease), color 220ms var(--sk-ease), border-color 220ms var(--sk-ease);
}
.btn:hover, .btn:focus-visible { background: var(--sk-ink); color: var(--sk-paper); }
.btn--solid { background: var(--sk-ink); color: var(--sk-paper); }
.btn--solid:hover, .btn--solid:focus-visible { background: var(--sk-vermillion-deep); border-color: var(--sk-vermillion-deep); }
.btn .icon { width: 14px; height: 14px; }

.icon { width: 20px; height: 20px; flex-shrink: 0; }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 700ms var(--sk-ease), transform 700ms var(--sk-ease); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- corner-bracket framing (viewfinder/storyboard field marks) ---------- */
.framed { position: relative; }
.framed::before, .framed::after,
.framed .fbr-tl, .framed .fbr-tr, .framed .fbr-bl, .framed .fbr-br { display: none; }
.framed {
	--fb: 18px;
}
.framed > .fbrackets { position: absolute; inset: 0; pointer-events: none; }
.framed > .fbrackets span { position: absolute; width: var(--fb); height: var(--fb); border-color: currentColor; opacity: 0.55; }
.framed > .fbrackets span:nth-child(1) { top: -1px; left: -1px; border-top: 2px solid; border-left: 2px solid; }
.framed > .fbrackets span:nth-child(2) { top: -1px; right: -1px; border-top: 2px solid; border-right: 2px solid; }
.framed > .fbrackets span:nth-child(3) { bottom: -1px; left: -1px; border-bottom: 2px solid; border-left: 2px solid; }
.framed > .fbrackets span:nth-child(4) { bottom: -1px; right: -1px; border-bottom: 2px solid; border-right: 2px solid; }

/* ---------- header ---------- */
.site-header {
	position: sticky;
	top: 0;
	z-index: 40;
	background: rgba(244, 237, 224, 0.92);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--sk-line);
}
.site-header__row {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	padding-block: 18px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { color: var(--sk-vermillion-deep); width: 26px; height: 26px; display: flex; }
.brand__mark img { max-height: 30px; width: auto; }
.brand__lock { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-family: var(--sk-serif); font-weight: 600; font-size: var(--fs-1); }
.brand__strap { font-family: var(--sk-mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sk-ink-2); }

.nav-toggle {
	display: none;
	background: none;
	border: 1px solid var(--sk-line-strong);
	border-radius: var(--sk-radius);
	width: 42px;
	height: 42px;
	align-items: center;
	justify-content: center;
}
.nav-toggle__bar, .nav-toggle__bar::before, .nav-toggle__bar::after {
	content: '';
	display: block;
	width: 18px;
	height: 1px;
	background: var(--sk-ink);
	position: relative;
	transition: transform 220ms var(--sk-ease), opacity 220ms var(--sk-ease);
}
.nav-toggle__bar::before { position: absolute; top: -6px; }
.nav-toggle__bar::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after { transform: translateY(-6px) rotate(-45deg); }

.primary-nav ul { display: flex; align-items: center; gap: 32px; }
.primary-nav a {
	font-family: var(--sk-mono);
	font-size: var(--fs--1);
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--sk-ink-2);
	padding-block: 4px;
	border-bottom: 1px solid transparent;
	transition: color 180ms var(--sk-ease), border-color 180ms var(--sk-ease);
}
.primary-nav a:hover, .primary-nav a:focus-visible, .primary-nav .current-menu-item > a { color: var(--sk-ink); border-color: var(--sk-vermillion); }

@media (max-width: 780px) {
	.nav-toggle { display: flex; }
	.primary-nav {
		position: absolute;
		inset: 100% 0 auto 0;
		background: var(--sk-paper);
		border-bottom: 1px solid var(--sk-line);
		max-height: 0;
		overflow: hidden;
		transition: max-height 320ms var(--sk-ease);
	}
	.primary-nav.is-open { max-height: 420px; }
	.primary-nav ul { flex-direction: column; align-items: flex-start; gap: 0; padding: 8px 0 20px; }
	.primary-nav a { display: block; padding: 12px var(--sk-unit); width: 100%; }
}

/* ---------- rule (section heading, "CUT NN" convention) ---------- */
.rule {
	display: grid;
	grid-template-columns: auto 1fr auto;
	align-items: baseline;
	gap: 18px;
	padding-bottom: 18px;
	margin-bottom: 44px;
	border-bottom: 1px solid var(--sk-line);
}
.rule__code { font-family: var(--sk-mono); font-size: var(--fs--1); color: var(--sk-vermillion); letter-spacing: 0.06em; }
.rule__title { margin: 0; }
.rule__aside { font-family: var(--sk-mono); font-size: var(--fs--1); color: var(--sk-ink-2); text-align: right; }

section { padding-block: clamp(56px, 9vw, 128px); }
section + section { border-top: 1px solid var(--sk-line); }

/* ---------- hero ---------- */
.hero { padding-top: clamp(48px, 8vw, 96px); position: relative; }
.hero__grid {
	display: grid;
	grid-template-columns: 1.05fr 0.95fr;
	gap: clamp(28px, 5vw, 64px);
	align-items: center;
}
.hero__title { margin-block: 18px 22px; }
.hero__body { color: var(--sk-ink-2); font-size: var(--fs-1); }
.hero__actions { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }
.hero__stage {
	position: relative;
	aspect-ratio: 16/10;
	border-radius: var(--sk-radius);
	overflow: hidden;
	box-shadow: var(--sk-shadow);
	background: var(--sk-ink);
	color: var(--sk-paper);
}
.hero__stage canvas { width: 100%; height: 100%; display: block; }
.hero__stage-cap {
	position: absolute; left: 0; right: 0; bottom: 0;
	padding: 12px 16px;
	background: linear-gradient(0deg, rgba(0, 0, 0, 0.55), transparent);
	color: #fff;
	font-family: var(--sk-mono);
	font-size: 0.64rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	display: flex;
	justify-content: space-between;
}
@media (max-width: 900px) { .hero__grid { grid-template-columns: 1fr; } .hero__stage { order: -1; } }

/* ---------- stats strip ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--sk-line); border: 1px solid var(--sk-line); border-radius: var(--sk-radius); overflow: hidden; }
.stat { background: var(--sk-paper); padding: 28px 22px; }
.stat__num { font-family: var(--sk-serif); font-size: var(--fs-3); color: var(--sk-vermillion-deep); display: block; }
.stat__label { font-family: var(--sk-mono); font-size: var(--fs--1); color: var(--sk-ink-2); }
@media (max-width: 780px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- work/post card grid ---------- */
.wgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 32px); }
.wgrid--asym { grid-template-columns: repeat(6, 1fr); }
.wgrid--asym .wcard:nth-child(6n+1) { grid-column: span 3; }
.wgrid--asym .wcard:nth-child(6n+2) { grid-column: span 3; }
.wgrid--asym .wcard:nth-child(6n+3),
.wgrid--asym .wcard:nth-child(6n+4),
.wgrid--asym .wcard:nth-child(6n+5) { grid-column: span 2; }
.wgrid--asym .wcard:nth-child(6n) { grid-column: span 6; }
.wgrid--asym .wcard:nth-child(6n) .wcard__media { aspect-ratio: 21/9; }
@media (max-width: 980px) { .wgrid, .wgrid--asym { grid-template-columns: repeat(2, 1fr); } .wgrid--asym .wcard { grid-column: span 1 !important; } }
@media (max-width: 600px) { .wgrid, .wgrid--asym { grid-template-columns: 1fr; } }

.wcard { display: flex; flex-direction: column; }
.wcard__media { display: block; aspect-ratio: 4/5; border-radius: var(--sk-radius); overflow: hidden; background: var(--sk-paper-2); margin-bottom: 16px; position: relative; }
.wcard__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 520ms var(--sk-ease); }
.wcard:hover .wcard__media img { transform: scale(1.035); }
.wcard__body { display: flex; flex-direction: column; gap: 6px; }
.wcard__kicker { font-family: var(--sk-mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--sk-vermillion); }
.wcard__title { font-size: var(--fs-1); }
.wcard__text { color: var(--sk-ink-2); font-size: 0.92rem; }

/* ---------- frame-hold comparator ---------- */
.holds { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--sk-line); border-radius: var(--sk-radius); overflow: hidden; }
.hold-row { display: grid; grid-template-columns: 200px 1fr 150px 168px; gap: 20px; align-items: center; padding: 18px 24px; border-bottom: 1px solid var(--sk-line); background: var(--sk-paper); }
.hold-row:last-child { border-bottom: none; }
.hold-row__label { display: flex; flex-direction: column; gap: 2px; text-align: left; }
.hold-row__name { font-family: var(--sk-serif); font-weight: 600; font-size: var(--fs-1); }
.hold-row__jp { font-family: var(--sk-mono); font-size: 0.68rem; color: var(--sk-ink-2); }
.hold-row__math { font-family: var(--sk-mono); font-size: var(--fs--1); color: var(--sk-vermillion); }
.hold-row__note { font-size: 0.86rem; color: var(--sk-ink-2); }
.hold-row__lane {
	display: block;
	position: relative;
	width: 168px;
	height: 56px;
	background: var(--sk-ink);
	border-radius: var(--sk-radius);
	overflow: hidden;
}
.hold-row__lane canvas { width: 100%; height: 100%; display: block; }
@media (max-width: 900px) { .hold-row { grid-template-columns: 1fr; text-align: left; } .hold-row__lane { width: 100%; } }

/* ---------- pipeline (production stages) ---------- */
.pipeline { display: grid; grid-template-columns: repeat(7, 1fr); gap: 1px; background: var(--sk-line); border: 1px solid var(--sk-line); }
.pstage { background: var(--sk-paper); padding: 22px 16px; display: flex; flex-direction: column; gap: 8px; }
.pstage__num { font-family: var(--sk-mono); font-size: 0.68rem; color: var(--sk-vermillion); }
.pstage__jp { font-family: var(--sk-serif); font-size: 0.82rem; color: var(--sk-ink-2); }
.pstage__name { font-family: var(--sk-sans); font-weight: 700; font-size: 0.94rem; }
.pstage__text { font-size: 0.78rem; color: var(--sk-ink-2); line-height: 1.5; }
@media (max-width: 980px) { .pipeline { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .pipeline { grid-template-columns: 1fr; } }

/* ---------- inbetween demo ---------- */
.inbetween { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 56px); align-items: center; }
.inbetween__stage { position: relative; aspect-ratio: 4/3; background: var(--sk-paper-2); border: 1px solid var(--sk-line); border-radius: var(--sk-radius); }
.inbetween__stage svg { width: 100%; height: 100%; }
.inbetween__controls { display: flex; flex-direction: column; gap: 18px; }
.inbetween__slider-row { display: flex; flex-direction: column; gap: 8px; }
.inbetween__slider-row label { font-family: var(--sk-mono); font-size: var(--fs--1); text-transform: uppercase; letter-spacing: 0.06em; color: var(--sk-ink-2); display: flex; justify-content: space-between; }
.inbetween__slider-row input[type="range"] { width: 100%; accent-color: var(--sk-vermillion); }
@media (max-width: 780px) { .inbetween { grid-template-columns: 1fr; } }

/* ---------- work detail spec table ---------- */
.spec { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px 32px; }
.spec__item { padding-block: 14px; border-bottom: 1px solid var(--sk-line); display: flex; justify-content: space-between; gap: 12px; }
.spec__label { font-family: var(--sk-mono); font-size: var(--fs--1); text-transform: uppercase; letter-spacing: 0.05em; color: var(--sk-ink-2); }
.spec__value { font-family: var(--sk-serif); font-weight: 600; text-align: right; }
@media (max-width: 700px) { .spec { grid-template-columns: 1fr; } }

/* ---------- two-col editorial ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 72px); align-items: center; }
.split--reverse .split__media { order: 2; }
.split__media { aspect-ratio: 5/6; border-radius: var(--sk-radius); overflow: hidden; }
.split__media img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 900px) { .split, .split--reverse .split__media { grid-template-columns: 1fr; order: -1; } }

/* ---------- footer ---------- */
.site-footer { background: var(--sk-ink); color: var(--sk-paper-2); padding-block: 64px 32px; }
.site-footer a { color: var(--sk-paper-2); }
.site-footer .brand__name, .site-footer .brand__strap { color: var(--sk-paper); }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(244, 237, 224, 0.14); }
.footer__col h4 { color: var(--sk-paper); margin-bottom: 14px; }
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col a:hover { color: var(--sk-vermillion); }
.footer__bottom { display: flex; justify-content: space-between; padding-top: 24px; font-family: var(--sk-mono); font-size: 0.68rem; letter-spacing: 0.04em; color: rgba(244, 237, 224, 0.5); flex-wrap: wrap; gap: 10px; }
@media (max-width: 780px) { .footer__grid { grid-template-columns: 1fr; } }

/* ---------- forms ---------- */
.form-row { margin-bottom: 18px; display: flex; flex-direction: column; gap: 6px; }
.form-row label { font-family: var(--sk-mono); font-size: var(--fs--1); text-transform: uppercase; letter-spacing: 0.05em; color: var(--sk-ink-2); }
.form-row input, .form-row textarea, .form-row select {
	background: var(--sk-paper);
	border: 1px solid var(--sk-line-strong);
	border-radius: var(--sk-radius);
	padding: 12px 14px;
	font-size: var(--fs-0);
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus { outline: 2px solid var(--sk-pencil); outline-offset: 1px; }
.form-row--hp { position: absolute; left: -9999px; }
.form-msg { font-family: var(--sk-mono); font-size: var(--fs--1); margin-top: 12px; }
.form-msg--ok { color: var(--sk-vermillion-deep); }
.form-msg--err { color: #a34c3f; }

/* ---------- misc ---------- */
.tag-row { display: flex; gap: 10px; flex-wrap: wrap; }
.tag {
	font-family: var(--sk-mono);
	font-size: 0.64rem;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	border: 1px solid var(--sk-line-strong);
	border-radius: 999px;
	padding: 6px 12px;
	color: var(--sk-ink-2);
}
.tag.is-active, .tag:hover { border-color: var(--sk-vermillion); color: var(--sk-ink); }

.breadcrumb { font-family: var(--sk-mono); font-size: var(--fs--1); color: var(--sk-ink-2); margin-bottom: 24px; }
.breadcrumb a:hover { color: var(--sk-ink); }

.pagination { display: flex; gap: 10px; margin-top: 48px; }

.skip-link { position: absolute; left: -9999px; top: 0; background: var(--sk-ink); color: var(--sk-paper); padding: 12px 18px; z-index: 100; }
.skip-link:focus { left: 12px; top: 12px; }

.screen-reader-text { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }