:root {
	color-scheme: dark;
	font-family:
		Inter, "Helvetica Neue", "Noto Sans JP", "Yu Gothic", YuGothic, Meiryo,
		sans-serif;
	--color-bg: #0b0d0f;
	--color-surface: #121518;
	--color-surface-hover: #171b1e;
	--color-surface-input: #0e1113;
	--color-surface-disabled: #0e1012;
	--color-surface-raised: #131619;
	--color-surface-modal: #111416;
	--color-surface-rgb: 18 21 24;
	--color-line: rgba(238, 243, 236, 0.2);
	--color-line-strong: rgba(238, 243, 236, 0.34);
	--color-text: #eef3ec;
	--color-text-rgb: 238 243 236;
	--color-text-secondary: #c3c9c4;
	--color-text-disabled: #656b67;
	--color-muted: #858c88;
	--color-accent: #d8ff48;
	--color-accent-rgb: 216 255 72;
	--color-accent-hover: #e4ff82;
	--color-on-accent: #12160c;
	--color-danger: #ffb0b0;
	--color-warning: #ffd18a;
	--color-info: #b9e2ff;
	--color-page-glow: rgba(216, 255, 72, 0.075);
	--color-grid-line: rgba(255, 255, 255, 0.022);
	--color-backdrop: rgba(3, 5, 6, 0.79);
	--shadow-modal: 0 1.5rem 5rem rgba(0, 0, 0, 0.74);
	--rarity-ur: linear-gradient(135deg, #f25bd5 0%, #9b7cff 26%, #48bfff 51%, #65e6a5 74%, #ffd85c 100%);
	--rarity-sr: #dc7b32;
	--rarity-r: #367edb;
	--rarity-n: #69716f;
	--radius-small: 0.35rem;
	--radius-medium: 0.65rem;
	--content-width: 52rem;
}

html[data-theme="light"] {
	color-scheme: light;
	--color-bg: #f4f6f1;
	--color-surface: #ffffff;
	--color-surface-hover: #e9eee5;
	--color-surface-input: #ffffff;
	--color-surface-disabled: #e4e8e1;
	--color-surface-raised: #eef1eb;
	--color-surface-modal: #ffffff;
	--color-surface-rgb: 255 255 255;
	--color-line: rgba(24, 32, 25, 0.18);
	--color-line-strong: rgba(24, 32, 25, 0.34);
	--color-text: #182019;
	--color-text-rgb: 24 32 25;
	--color-text-secondary: #465047;
	--color-text-disabled: #8b938c;
	--color-muted: #687169;
	--color-accent: #5b7900;
	--color-accent-rgb: 91 121 0;
	--color-accent-hover: #496200;
	--color-on-accent: #ffffff;
	--color-danger: #a52b2b;
	--color-warning: #725100;
	--color-info: #145d8a;
	--color-page-glow: rgba(91, 121, 0, 0.1);
	--color-grid-line: rgba(24, 32, 25, 0.035);
	--color-backdrop: rgba(20, 27, 21, 0.58);
	--shadow-modal: 0 1.5rem 4rem rgba(24, 32, 25, 0.24);
}

html[data-theme="light"] .attribute-icon--light { color: #617500; }
html[data-theme="light"] .attribute-icon--dark { color: #654095; }
html[data-theme="light"] .attribute-icon--fire { color: #9b341d; }
html[data-theme="light"] .attribute-icon--water { color: #1b609c; }
html[data-theme="light"] .attribute-icon--wind,
html[data-theme="light"] .attribute-icon--spell { color: #176f58; }
html[data-theme="light"] .attribute-icon--earth,
html[data-theme="light"] .attribute-icon--divine { color: #795510; }
html[data-theme="light"] .attribute-icon--trap { color: #913469; }

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

html {
	min-width: 320px;
	background: var(--color-bg);
}

body {
	min-height: 100vh;
	min-height: 100svh;
	margin: 0;
	color: var(--color-text);
	background:
		radial-gradient(circle at 50% 0%, var(--color-page-glow), transparent 31rem),
		var(--color-bg);
}

html.modal-scroll-locked,
body.modal-scroll-locked {
	overflow: hidden;
	overscroll-behavior: none;
}

body::before {
	position: fixed;
	inset: 0;
	z-index: -1;
	background-image:
		linear-gradient(var(--color-grid-line) 1px, transparent 1px),
		linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px);
	background-size: 3.5rem 3.5rem;
	content: "";
	mask-image: radial-gradient(circle at center, black, transparent 78%);
}

.card-detail-modal {
	width: min(70rem, calc(100% - 2.5rem));
	height: min(43rem, calc(100svh - 2.5rem));
	max-width: none;
	max-height: none;
	padding: 0;
	overflow: hidden;
	border: 1px solid var(--color-line-strong);
	border-radius: var(--radius-medium);
	color: var(--color-text);
	background: var(--color-surface-modal);
	box-shadow: var(--shadow-modal);
}

.card-detail-modal::backdrop {
	background: var(--color-backdrop);
	backdrop-filter: blur(2px);
}

.card-detail-modal__content {
	position: relative;
	width: 100%;
	height: 100%;
	min-height: 0;
	padding: clamp(1rem, 2vw, 1.45rem);
	overflow-y: auto;
	overscroll-behavior: contain;
	touch-action: pan-y;
	-webkit-overflow-scrolling: touch;
}

button {
	font: inherit;
}

/* Card rarity is intentionally independent from pool type and card source. */
.rarity-badge[data-rarity] {
	border-color: var(--rarity-border);
	color: #fff;
	background: var(--rarity-color);
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.72);
}

.rarity-badge[data-rarity="UR"] { --rarity-color: var(--rarity-ur); --rarity-border: #f2b6e8; }
.rarity-badge[data-rarity="SR"] { --rarity-color: var(--rarity-sr); --rarity-border: #efa061; }
.rarity-badge[data-rarity="R"] { --rarity-color: var(--rarity-r); --rarity-border: #75adf0; }
.rarity-badge[data-rarity="N"] { --rarity-color: var(--rarity-n); --rarity-border: #a3aaa7; }

.app-shell {
	display: flex;
	flex-direction: column;
	justify-content: center;
	width: min(100%, var(--content-width));
	min-height: 100vh;
	min-height: 100svh;
	margin: 0 auto;
	padding: clamp(2rem, 5vh, 4rem) clamp(1.25rem, 4vw, 2.5rem);
}

/* 独立したタイトル領域。将来ロゴへ置き換える場合はこのブロックを差し替える。 */
.app-title {
	margin-bottom: clamp(2.25rem, 5vh, 3.75rem);
	text-align: center;
}

.app-title__name {
	margin: 0;
	font-size: clamp(2.6rem, 6vw, 4.8rem);
	font-weight: 850;
	letter-spacing: -0.07em;
	line-height: 1.08;
}

.app-title__english {
	margin: 0.75rem 0 0;
	color: var(--color-accent);
	font-size: clamp(0.62rem, 1.1vw, 0.76rem);
	font-weight: 750;
	letter-spacing: 0.28em;
	line-height: 1.5;
}

.menu-panel,
.menu-section {
	min-width: 0;
}

.menu-panel {
	width: 100%;
}

.menu-section + .menu-section {
	margin-top: clamp(1.7rem, 3.7vh, 2.5rem);
}

.section-heading {
	position: relative;
	display: flex;
	align-items: baseline;
	gap: 0.8rem;
	margin-bottom: 0.9rem;
	padding-bottom: 0.65rem;
	border-bottom: 1px solid var(--color-line);
}

.section-heading::after {
	position: absolute;
	bottom: -1px;
	left: 0;
	width: 2.6rem;
	height: 2px;
	background: var(--color-accent);
	content: "";
}

.section-heading h2 {
	margin: 0;
	font-size: clamp(1.28rem, 2.4vw, 1.8rem);
	font-weight: 800;
	letter-spacing: -0.035em;
	line-height: 1.2;
}

.section-heading__english {
	color: rgb(var(--color-text-rgb) / 0.38);
	font-size: clamp(0.6rem, 1vw, 0.7rem);
	font-weight: 800;
	letter-spacing: 0.24em;
	line-height: 1;
	white-space: nowrap;
}

.primary-actions {
	display: grid;
	gap: 0.75rem;
}

.primary-actions--rooms {
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.menu-button,
.secondary-button {
	-webkit-tap-highlight-color: transparent;
	appearance: none;
	color: var(--color-text);
	background: rgb(var(--color-surface-rgb) / 0.9);
	border: 1px solid var(--color-line-strong);
	cursor: pointer;
	text-align: left;
	transition:
		transform 160ms ease,
		border-color 160ms ease,
		background-color 160ms ease,
		color 160ms ease;
}

.menu-button {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: center;
	gap: 1rem;
	min-height: 6.15rem;
	padding: 1rem 1.2rem;
	border-radius: var(--radius-medium);
	text-decoration: none;
}

.menu-button:focus-visible,
.secondary-button:focus-visible {
	outline: 3px solid var(--color-accent);
	outline-offset: 3px;
}

.menu-button__icon,
.secondary-button__icon {
	display: grid;
	place-items: center;
	flex: 0 0 auto;
	border: 1px solid var(--color-line);
	color: var(--color-text-secondary);
	transition:
		border-color 160ms ease,
		color 160ms ease;
}

.menu-button__icon {
	width: 2.8rem;
	height: 2.8rem;
	border-radius: 50%;
}

.menu-button__icon svg,
.secondary-button__icon svg {
	width: 1.45rem;
	height: 1.45rem;
	fill: none;
	stroke: currentColor;
	stroke-width: 1.65;
	stroke-linecap: round;
	stroke-linejoin: round;
}


.menu-button__text,
.secondary-button__text {
	display: flex;
	flex-direction: column;
	min-width: 0;
}

.menu-button__text {
	gap: 0.24rem;
}

.menu-button__text strong {
	font-size: clamp(1rem, 1.8vw, 1.22rem);
	font-weight: 800;
	letter-spacing: 0.01em;
}

.menu-button__text small,
.secondary-button__text small {
	color: var(--color-muted);
	font-size: 0.58rem;
	font-weight: 800;
	letter-spacing: 0.17em;
	line-height: 1.3;
}

.menu-button__arrow {
	color: var(--color-muted);
	font-size: 1.25rem;
	transition:
		color 160ms ease,
		transform 160ms ease;
}

.menu-description {
	display: none;
}

@media (min-width: 74rem) and (hover: hover) and (pointer: fine) {
	.menu-button:hover,
	.secondary-button:hover {
		border-color: var(--color-accent);
		background: var(--color-surface-hover);
		transform: translateY(-2px);
	}

	.menu-button:hover .menu-button__icon,
	.secondary-button:hover .secondary-button__icon {
		border-color: rgb(var(--color-accent-rgb) / 0.54);
		color: var(--color-accent);
	}

	.menu-button:hover .menu-button__arrow {
		color: var(--color-accent);
		transform: translateX(0.22rem);
	}
}

@media (min-width: 88rem) and (hover: hover) and (pointer: fine) {
	.primary-actions,
	.secondary-actions {
		position: relative;
	}

	.menu-description {
		position: absolute;
		top: 50%;
		left: calc(100% + 2rem);
		display: block;
		width: clamp(18rem, calc(50vw - 27rem), 26rem);
		padding: 0.75rem 0 0.75rem 1rem;
		border-left: 2px solid var(--color-accent);
		color: var(--color-text-secondary);
		font-size: 0.78rem;
		font-weight: 600;
		line-height: 1.65;
		word-break: keep-all;
		pointer-events: none;
		opacity: 0;
		visibility: hidden;
		transform: translate(-0.45rem, -50%);
		transition: opacity 180ms ease, transform 180ms ease;
	}

	.secondary-actions .menu-description {
		top: calc(50% + 0.5rem);
	}

	.primary-actions:has([data-menu-description="create"]:is(:hover, :focus-visible)) [data-menu-description-content="create"],
	.primary-actions:has([data-menu-description="join"]:is(:hover, :focus-visible)) [data-menu-description-content="join"],
	.primary-actions:has([data-menu-description="pools"]:is(:hover, :focus-visible)) [data-menu-description-content="pools"],
	.secondary-actions:has([data-menu-description="statistics"]:is(:hover, :focus-visible)) [data-menu-description-content="statistics"],
	.secondary-actions:has([data-menu-description="settings"]:is(:hover, :focus-visible)) [data-menu-description-content="settings"] {
		opacity: 1;
		visibility: visible;
		transform: translate(0, -50%);
	}
}

.secondary-actions {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0.75rem;
	margin-top: clamp(1.7rem, 3.7vh, 2.5rem);
	padding-top: 1rem;
	border-top: 1px solid var(--color-line);
}

.secondary-button {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr);
	align-items: center;
	gap: 0.85rem;
	min-height: 4.2rem;
	padding: 0.7rem 1rem;
	border-color: var(--color-line);
	border-radius: var(--radius-small);
	text-decoration: none;
}

.secondary-button__icon {
	width: 2.3rem;
	height: 2.3rem;
	border: 0;
}

.secondary-button__icon svg {
	width: 1.3rem;
	height: 1.3rem;
}

.secondary-button__text {
	gap: 0.15rem;
}

.secondary-button__text strong {
	font-size: 0.9rem;
	font-weight: 700;
}

@media (max-width: 40rem) and (orientation: portrait) {
	.app-shell {
		justify-content: flex-start;
		padding: 2rem 1.25rem;
	}

	.app-title {
		margin-bottom: 2.5rem;
	}

	.app-title__name {
		font-size: clamp(2.3rem, 11vw, 3.25rem);
	}

	.primary-actions--rooms {
		grid-template-columns: 1fr;
	}

	.menu-button {
		min-height: 5.5rem;
	}

	.menu-section + .menu-section,
	.secondary-actions {
		margin-top: 1.6rem;
	}
}

@media (max-width: 23rem) {
	.secondary-actions {
		grid-template-columns: 1fr;
	}
}

@media (orientation: landscape) and (max-height: 38rem) {
	.app-shell {
		justify-content: center;
		padding: 0.8rem clamp(1rem, 4vw, 2.5rem);
	}

	.app-title {
		margin-bottom: 0.85rem;
	}

	.app-title__name {
		font-size: clamp(1.8rem, 6.5vh, 2.55rem);
	}

	.app-title__english {
		margin-top: 0.28rem;
		font-size: 0.53rem;
	}

	.menu-section + .menu-section {
		margin-top: 0.65rem;
	}

	.section-heading {
		margin-bottom: 0.45rem;
		padding-bottom: 0.35rem;
	}

	.section-heading h2 {
		font-size: clamp(1rem, 4.2vh, 1.35rem);
	}

	.section-heading__english {
		font-size: 0.53rem;
	}

	.menu-button {
		min-height: 3.7rem;
		padding: 0.5rem 0.8rem;
	}

	.menu-button__icon {
		width: 2.35rem;
		height: 2.35rem;
	}

	.menu-button__icon svg {
		width: 1.2rem;
		height: 1.2rem;
	}

	.menu-button__text strong {
		font-size: 0.9rem;
	}

	.secondary-actions {
		margin-top: 0.65rem;
		padding-top: 0.55rem;
	}

	.secondary-actions .menu-description {
		top: calc(50% + 0.275rem);
	}

	.secondary-button {
		min-height: 2.85rem;
		padding: 0.35rem 0.75rem;
	}

	.secondary-button__icon {
		width: 1.9rem;
		height: 1.9rem;
	}
}

@media (orientation: landscape) and (max-height: 29rem) {
	.app-shell {
		padding-top: 0.55rem;
		padding-bottom: 0.55rem;
	}

	.app-title {
		margin-bottom: 0.55rem;
	}

	.app-title__name {
		font-size: 1.65rem;
	}

	.menu-button {
		min-height: 3.3rem;
	}

	.menu-section + .menu-section,
	.secondary-actions {
		margin-top: 0.45rem;
	}

	.secondary-actions {
		padding-top: 0.4rem;
	}

	.secondary-actions .menu-description {
		top: calc(50% + 0.2rem);
	}

	.secondary-button {
		min-height: 2.55rem;
	}
}

@media (prefers-reduced-motion: reduce) {
	.menu-button,
	.secondary-button,
	.menu-button__icon,
	.secondary-button__icon,
	.menu-button__arrow {
		transition: none;
	}

	.menu-description {
		transition: none;
	}

}