/* ==========================================================================
   書楽 会員ページ - パスワード入力画面
   和紙のような生成りの背景に、白いカード。墨色と朱色をアクセントに。
   ========================================================================== */

:root {
	--sl-paper: #f3eee5;
	--sl-paper-deep: #e7dfd0;
	--sl-paper-light: #fbf8f2;
	--sl-card: #fffdfa;
	--sl-ink: #1f1d1b;
	--sl-ink-soft: #5d5852;
	--sl-ink-mute: #8b847a;
	--sl-line: #d8d0c2;
	--sl-vermilion: #b5322f;
	--sl-vermilion-soft: #f8e6e4;
	--sl-focus: rgba(181, 50, 47, 0.18);
	--sl-serif: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", serif;
	--sl-sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", "Noto Sans JP", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html, body { height: 100%; margin: 0; padding: 0; }

body.syoraku-login {
	min-height: 100%;
	display: flex;
	flex-direction: column;
	font-family: var(--sl-sans);
	font-size: 15px;
	line-height: 1.6;
	color: var(--sl-ink);
	background: var(--sl-paper);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

/* --- 背景 ------------------------------------------------------------- */

.sl-bg {
	position: fixed;
	top: 0; right: 0; bottom: 0; left: 0;
	z-index: 0;
	overflow: hidden;
	background-color: var(--sl-paper);
	background-image: radial-gradient(120% 90% at 50% -10%, var(--sl-paper-light) 0%, var(--sl-paper) 55%, var(--sl-paper-deep) 100%);
	background-size: cover;
	background-position: center;
}

/* 紙の質感 (SVG ノイズ) */
.sl-bg::before {
	content: "";
	position: absolute;
	top: 0; right: 0; bottom: 0; left: 0;
	opacity: 0.55;
	mix-blend-mode: multiply;
	pointer-events: none;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.20 0 0 0 0 0.15 0 0 0 0 0.10 0 0 0 0.10 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 右下に薄く「書」の透かし */
.sl-mark {
	position: absolute;
	right: -3vw;
	bottom: -5vw;
	width: min(50vw, 540px);
	height: auto;
	opacity: 0.07;
	mix-blend-mode: multiply;
	filter: grayscale(1);
	pointer-events: none;
	user-select: none;
}

/* --- レイアウト --------------------------------------------------------- */

.sl-wrap {
	position: relative;
	z-index: 1;
	flex: 1;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	padding: 48px 16px;
}

.sl-card {
	position: relative;
	width: 100%;
	max-width: 420px;
	padding: 52px 44px 44px;
	background: var(--sl-card);
	border: 1px solid rgba(0, 0, 0, 0.05);
	border-radius: 14px;
	box-shadow:
		0 1px 2px rgba(40, 30, 20, 0.04),
		0 24px 60px -24px rgba(40, 30, 20, 0.28);
	animation: sl-rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

@keyframes sl-rise {
	from { opacity: 0; transform: translateY(14px); }
	to   { opacity: 1; transform: none; }
}

/* 朱の落款 */
.sl-seal {
	position: absolute;
	top: 20px;
	right: 20px;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	font-family: var(--sl-serif);
	font-weight: 600;
	font-size: 14px;
	line-height: 1;
	letter-spacing: 0.06em;
	writing-mode: vertical-rl;
	color: #fff;
	background: var(--sl-vermilion);
	border-radius: 3px;
	transform: rotate(-3deg);
	box-shadow:
		inset 0 0 0 2px rgba(255, 255, 255, 0.35),
		0 2px 6px rgba(181, 50, 47, 0.3);
	opacity: 0.92;
}

/* --- ロゴ・見出し ------------------------------------------------------- */

.sl-logo {
	margin: 0 0 8px;
	padding: 0;
	text-align: center;
	font-size: 0;
	line-height: 0;
}

.sl-logo a {
	display: inline-block;
	border-radius: 8px;
	outline: none;
}

.sl-logo a:focus-visible {
	box-shadow: 0 0 0 4px var(--sl-focus);
}

.sl-logo img {
	width: 160px;
	height: auto;
	mix-blend-mode: multiply;
}

.sl-lead {
	position: relative;
	margin: 0 0 30px;
	padding-top: 14px;
	text-align: center;
	font-family: var(--sl-serif);
	font-size: 13px;
	font-weight: 500;
	letter-spacing: 0.4em;
	text-indent: 0.4em;
	color: var(--sl-ink-soft);
}

.sl-lead::before {
	content: "";
	position: absolute;
	top: 0;
	left: 50%;
	width: 28px;
	height: 2px;
	margin-left: -14px;
	background: var(--sl-vermilion);
	border-radius: 2px;
}

/* --- メッセージ ---------------------------------------------------------- */

.sl-messages:empty { display: none; }

#login_error,
.sl-messages .message {
	margin: 0 0 20px;
	padding: 12px 14px;
	border-radius: 8px;
	font-size: 13.5px;
	line-height: 1.55;
}

#login_error {
	color: #8b2320;
	background: var(--sl-vermilion-soft);
	border: 1px solid rgba(181, 50, 47, 0.25);
}

#login_error strong { font-weight: 700; }
#login_error a { color: inherit; }
#login_error br:last-child { display: none; }

.sl-messages .message {
	color: #2d5a34;
	background: #eef3ee;
	border: 1px solid rgba(45, 90, 52, 0.2);
}

/* --- フォーム ------------------------------------------------------------ */

.sl-form { margin: 0; }

.sl-field { margin: 0 0 18px; }

.sl-label {
	display: block;
	margin: 0 0 8px;
	font-size: 12.5px;
	font-weight: 500;
	letter-spacing: 0.14em;
	color: var(--sl-ink-soft);
}

.sl-input-wrap { position: relative; }

.syoraku-login .sl-input {
	display: block;
	width: 100%;
	height: 54px;
	margin: 0;
	padding: 0 52px 0 16px;
	font: inherit;
	font-size: 18px;
	letter-spacing: 0.08em;
	color: var(--sl-ink);
	background: #fff;
	border: 1.5px solid var(--sl-line);
	border-radius: 10px;
	outline: none;
	-webkit-appearance: none;
	appearance: none;
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.syoraku-login .sl-input:focus {
	border-color: var(--sl-vermilion);
	box-shadow: 0 0 0 4px var(--sl-focus);
}

.syoraku-login .sl-input::-ms-reveal { display: none; }

.sl-toggle {
	position: absolute;
	top: 50%;
	right: 8px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 38px;
	height: 38px;
	margin: 0;
	padding: 0;
	border: 0;
	border-radius: 8px;
	background: transparent;
	color: var(--sl-ink-mute);
	cursor: pointer;
	transform: translateY(-50%);
	transition: background 0.15s ease, color 0.15s ease;
}

.sl-toggle:hover {
	background: var(--sl-paper);
	color: var(--sl-ink);
}

.sl-toggle:focus-visible {
	outline: 2px solid var(--sl-vermilion);
	outline-offset: 2px;
}

.sl-toggle svg { width: 20px; height: 20px; }
.sl-toggle .sl-eye-off { display: none; }
.sl-toggle.is-on .sl-eye { display: none; }
.sl-toggle.is-on .sl-eye-off { display: block; }

.sl-row {
	display: flex;
	align-items: center;
	justify-content: space-between;
	min-height: 22px;
	margin: 0 0 24px;
}

.sl-check {
	position: relative;
	display: inline-flex;
	align-items: center;
	gap: 10px;
	font-size: 13.5px;
	color: var(--sl-ink-soft);
	cursor: pointer;
	user-select: none;
}

.sl-check input {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: 0;
	opacity: 0;
	pointer-events: none;
}

.sl-check-box {
	position: relative;
	flex: none;
	width: 20px;
	height: 20px;
	background: #fff;
	border: 1.5px solid var(--sl-line);
	border-radius: 6px;
	transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.sl-check-box::after {
	content: "";
	position: absolute;
	top: 2.5px;
	left: 6px;
	width: 5px;
	height: 10px;
	border: solid #fff;
	border-width: 0 2px 2px 0;
	transform: rotate(45deg) scale(0);
	transition: transform 0.15s ease;
}

.sl-check:hover .sl-check-box { border-color: var(--sl-ink-mute); }

.sl-check input:checked + .sl-check-box {
	background: var(--sl-ink);
	border-color: var(--sl-ink);
}

.sl-check input:checked + .sl-check-box::after {
	transform: rotate(45deg) scale(1);
}

.sl-check input:focus-visible + .sl-check-box {
	border-color: var(--sl-vermilion);
	box-shadow: 0 0 0 4px var(--sl-focus);
}

.sl-submit { margin: 0; padding: 0; }

.syoraku-login .sl-button {
	display: block;
	width: 100%;
	height: 54px;
	margin: 0;
	padding: 0;
	border: 0;
	border-radius: 10px;
	font: inherit;
	font-size: 15px;
	font-weight: 500;
	letter-spacing: 0.3em;
	text-indent: 0.3em;
	color: #fff;
	background: var(--sl-ink);
	cursor: pointer;
	box-shadow: 0 10px 24px -12px rgba(31, 29, 27, 0.6);
	transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.syoraku-login .sl-button:hover {
	background: #000;
	transform: translateY(-1px);
	box-shadow: 0 14px 28px -12px rgba(31, 29, 27, 0.7);
}

.syoraku-login .sl-button:active {
	transform: translateY(0);
	box-shadow: 0 6px 16px -10px rgba(31, 29, 27, 0.6);
}

.syoraku-login .sl-button:focus-visible {
	outline: 2px solid var(--sl-vermilion);
	outline-offset: 3px;
}

/* カード下の注意書き */
.sl-note {
	position: relative;
	z-index: 1;
	max-width: 420px;
	margin: 24px 0 0;
	padding: 0 8px;
	font-size: 13px;
	line-height: 1.7;
	letter-spacing: 0.05em;
	color: var(--sl-ink-soft);
	text-align: center;
}

/* 文節の途中で折り返さない */
.sl-note span { display: inline-block; }

.sl-footer {
	position: relative;
	z-index: 1;
	margin: 20px 0 0;
	font-size: 11.5px;
	letter-spacing: 0.15em;
	color: var(--sl-ink-mute);
	text-align: center;
}

/* --- エラー時に揺らす ---------------------------------------------------- */

.sl-card.is-shake {
	animation:
		sl-rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both,
		sl-shake 0.5s 0.15s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes sl-shake {
	10%, 90% { transform: translateX(-2px); }
	20%, 80% { transform: translateX(4px); }
	30%, 50%, 70% { transform: translateX(-6px); }
	40%, 60% { transform: translateX(6px); }
}

@media (prefers-reduced-motion: reduce) {
	.sl-card, .sl-card.is-shake { animation: none; }
	.syoraku-login .sl-button:hover { transform: none; }
}

/* --- スマートフォン ------------------------------------------------------ */

@media (max-width: 480px) {
	.sl-wrap { padding: 32px 16px; }
	.sl-card { padding: 40px 24px 32px; border-radius: 12px; }
	.sl-logo img { width: 136px; }
	.sl-lead { margin-bottom: 24px; }
	.sl-seal { top: 14px; right: 14px; width: 34px; height: 34px; font-size: 12px; }
	.sl-mark { width: 70vw; right: -12vw; bottom: -8vw; }
}

@media (max-height: 560px) {
	.sl-wrap { justify-content: flex-start; }
}