/* 紙芝居の舞台・字幕・操作（p261004-02） */
:root {
	--ks-ink: #1c2330;
	--ks-paper: #fbf6ea;
	--ks-navy1: #12224d;
	--ks-navy2: #2f5fbf;
	--ks-wood1: #7a4a22;
	--ks-wood2: #a8713b;
	--ks-pull: 700ms;	/* 紙を引き抜く時間。player.js の PULL_MS と揃える */
}
* { box-sizing: border-box; }
body {
	margin: 0;
	background: var(--ks-paper, #fbf6ea);
	color: var(--ks-ink, #1c2330);
	font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}
.ks-header {
	display: flex;
	align-items: center;
	gap: 14px;
	padding: 12px 20px;
	background: linear-gradient(135deg, var(--ks-navy1, #12224d), var(--ks-navy2, #2f5fbf));
	color: #fff;
}
.ks-title {
	margin: 0;
	font-size: 1.4em;
	background: transparent;
	color: #fff;
}
.ks-back {
	display: inline-block;
	padding: 2px 12px;
	border-radius: 6px;
	background: rgba(255, 255, 255, 0.18);
	color: #fff;
	text-decoration: none;
	font-weight: 700;
}
/* 舞台・字幕・送りのボタンが 1 画面に収まるよう、幅を画面の高さからも抑える */
.ks-main {
	max-width: min(1240px, max(480px, calc((100vh - 340px) * 16 / 9 + 68px)));
	margin: 0 auto;
	padding: 20px 16px 30px;
}

/* 舞台: 木の枠の中に 16:9 の絵を重ねる */
.ks-frame {
	padding: 18px;
	border-radius: 12px;
	background: linear-gradient(180deg, var(--ks-wood2, #a8713b), var(--ks-wood1, #7a4a22));
	box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}
.ks-stage {
	position: relative;
	aspect-ratio: 16 / 9;
	overflow: hidden;
	border-radius: 4px;
	background: #fff;
	cursor: pointer;
}
.ks-card {
	position: absolute;
	inset: 0;
	background: #fff;
}
.ks-card svg {
	display: block;
	width: 100%;
	height: 100%;
}

/* 次へ: 今の絵を右へ引き抜く。前へ: 前の絵を右から差し込む */
.ks-card.is-pull {
	z-index: 2;
	box-shadow: -10px 0 16px rgba(0, 0, 0, 0.25);
	animation: ks-pull var(--ks-pull, 700ms) ease-in forwards;
}
.ks-card.is-insert {
	z-index: 2;
	box-shadow: -10px 0 16px rgba(0, 0, 0, 0.25);
	animation: ks-insert var(--ks-pull, 700ms) ease-out forwards;
}
@keyframes ks-pull {
	to { transform: translateX(105%); }
}
@keyframes ks-insert {
	from { transform: translateX(105%); }
	to { transform: translateX(0); }
}
@media (prefers-reduced-motion: reduce) {
	.ks-card.is-pull, .ks-card.is-insert { animation-duration: 1ms; }
}

.ks-start {
	position: absolute;
	left: 50%;
	bottom: 6%;
	z-index: 5;
	transform: translateX(-50%);
	padding: 0.35em 1.6em;
	border: 3px solid #fff;
	border-radius: 999px;
	background: linear-gradient(100deg, #a8284e, #d9607f);
	color: #fff;
	font: inherit;
	font-size: clamp(18px, 2.4vw, 30px);
	font-weight: 700;
	cursor: pointer;
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.ks-start[hidden] { display: none; }

/* 字幕と操作 */
.ks-caption {
	min-height: 3.8em;
	margin: 18px 0 0;
	padding: 14px 20px;
	border: 2px solid #e2d6bc;
	border-radius: 10px;
	background: #fff;
	color: var(--ks-ink, #1c2330);
	font-size: clamp(17px, 2vw, 24px);
	line-height: 1.7;
}
/* 読んでいる句は、青の太字に薄い青の背景で強調する。読み終えた部分は薄くする */
.ks-caption .ks-now {
	background: #dcebff;
	color: #0b4a9e;
	font-weight: 700;
	border-radius: 4px;
	-webkit-box-decoration-break: clone;
	box-decoration-break: clone;
}
.ks-caption .ks-said {
	background: transparent;
	color: #4a5568;
}
/* 「音」「読み上げ」のスイッチ形のボタンと、読み上げの声。操作は 1 列に並べ、狭い画面では折り返す */
.ks-toggle {
	position: relative;
	display: inline-flex;
	align-items: center;
	height: 2.2em;
	padding: 0 3em 0 10px;	/* 右にスイッチ。「音: (  ●)」の形 */
	border: 1px solid transparent;
	border-radius: 999px;
	background: linear-gradient(100deg, var(--ks-navy1, #12224d), var(--ks-navy2, #2f5fbf));
	color: #fff;
	font: inherit;
	font-size: 0.85em;
	font-weight: 700;
	white-space: nowrap;
	cursor: pointer;
	box-shadow: 0 1px 3px rgba(18, 34, 77, 0.3);
}
/* スイッチの溝と、動く丸 */
.ks-toggle::before {
	content: "";
	position: absolute;
	right: 8px;
	top: 50%;
	width: 1.8em;
	height: 1.1em;
	transform: translateY(-50%);
	border-radius: 999px;
	background: rgba(255, 255, 255, 0.35);
}
.ks-toggle::after {
	content: "";
	position: absolute;
	right: calc(8px + 2px);
	top: 50%;
	width: 0.9em;
	height: 0.9em;
	transform: translateY(-50%);
	border-radius: 50%;
	background: #fff;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
	transition: right 0.15s;
}
.ks-toggle[aria-pressed="false"] {
	border-color: #c9ced8;
	background: #fff;
	color: #4a5568;
	box-shadow: none;
}
.ks-toggle[aria-pressed="false"]::before {
	background: #c9ced8;
}
.ks-toggle[aria-pressed="false"]::after {
	right: calc(8px + 1.8em - 0.9em - 2px);
}
.ks-toggle:focus-visible, .ks-nav:focus-visible, .ks-voice select:focus-visible {
	outline: 3px solid #f0a548;
	outline-offset: 2px;
}
.ks-voice {
	background: transparent;
	color: #4a5568;
}
.ks-voice select {
	max-width: 36em;
	height: 2.2em;
	font: inherit;
	font-size: 0.85em;
	padding: 0 8px;
	border: 1px solid #c9ced8;
	border-radius: 999px;
	background: #fff;
	color: var(--ks-ink, #1c2330);
	cursor: pointer;
}
.ks-controls {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	align-items: center;
	gap: 8px 10px;
	margin-top: 14px;
	/* 絵の幅（高さに合わせて決まる）より広く取り、広い画面では 1 行に収める。狭い画面では折り返す */
	position: relative;
	left: 50%;
	width: min(1500px, calc(100vw - 32px));
	transform: translateX(-50%);
}
.ks-nav {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0;
	width: 1.9em;
	height: 1.5em;
	border: none;
	border-radius: 8px;
	background: linear-gradient(100deg, var(--ks-navy1, #12224d), var(--ks-navy2, #2f5fbf));
	color: #fff;
	font: inherit;
	font-size: 1.6em;
	font-weight: 700;
	line-height: 1;
	cursor: pointer;
}
.ks-nav:disabled {
	background: #c9ced8;
	color: #4a5568;
	cursor: default;
}
.ks-page {
	min-width: 4em;
	text-align: center;
	font-weight: 700;
	background: transparent;
	color: var(--ks-ink, #1c2330);
}