/* NEONCORE gamer sign-up form. Frontend Mentor challenge.
   Colors come from tokens defined per theme in themes.css.
   Effects are switched on by <html data-fx="..."> (see themes.js). */

@font-face {
	font-family: "Orbitron";
	src: url("assets/fonts/orbitron/static/orbitron-800.ttf") format("truetype");
	font-weight: 800;
	font-display: swap;
}
@font-face {
	font-family: "JetBrains Mono";
	src: url("assets/fonts/jetbrains-mono/static/jetbrains-mono-400.ttf") format("truetype");
	font-weight: 400;
	font-display: swap;
}
@font-face {
	font-family: "JetBrains Mono";
	src: url("assets/fonts/jetbrains-mono/static/jetbrains-mono-700.ttf") format("truetype");
	font-weight: 700;
	font-display: swap;
}

/* Registered so the holo border can animate its angle. */
@property --ang {
	syntax: "<angle>";
	inherits: false;
	initial-value: 0deg;
}
@property --iris {
	syntax: "<percentage>";
	inherits: false;
	initial-value: 0%;
}

:root {
	--font-display: "Orbitron", system-ui, sans-serif;
	--font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	border-radius: 0;
}

html {
	color-scheme: dark;
	-webkit-text-size-adjust: 100%;
	scrollbar-color: var(--line) var(--bg);
}

body {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
	background:
		radial-gradient(60% 55% at 78% 42%, var(--bg-glow-1), transparent 70%),
		radial-gradient(45% 40% at 5% 100%, var(--bg-glow-2), transparent 70%),
		var(--bg);
	color: var(--text);
	font-family: var(--font-mono);
	font-size: 0.875rem;
	line-height: 1.7143;
	overflow-x: hidden;
}

img {
	display: block;
	max-width: 100%;
}

[hidden] {
	display: none !important;
}

::selection {
	background: var(--accent);
	color: var(--accent-ink);
}

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0 0 0 0);
	white-space: nowrap;
	border: 0;
}

.skip-link {
	position: absolute;
	left: 16px;
	top: -100px;
	z-index: 60;
	padding: 8px 16px;
	background: var(--accent);
	color: var(--accent-ink);
	font-weight: 700;
	text-decoration: none;
}
.skip-link:focus {
	top: 16px;
}

/* One focus style for everything interactive */
:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 2px;
}

.mobile-only {
	display: inline;
}
.desktop-only {
	display: none;
}

/* Things that sit on the PAGE background (not the panel) use the on-bg colors.
   On a dark page these equal the normal colors; on a light page (Yellow) they differ. */
.brand,
.attribution,
.dock {
	--text: var(--on-bg);
	--text-hi: var(--on-bg);
	--text-2: var(--on-bg-2);
	--text-3: var(--on-bg-3);
	--text-4: var(--on-bg-4);
	--accent: var(--on-bg-accent);
	--success: var(--on-bg-success);
	--error: var(--on-bg-error);
	--line: var(--on-bg-line);
	--line-strong: var(--on-bg-line-strong);
}

/* ---------- Icons: one color from a token, shape from an SVG mask ---------- */

.tick,
.ico-alert,
.eye i {
	display: block;
	flex: none;
	-webkit-mask-repeat: no-repeat;
	mask-repeat: no-repeat;
	-webkit-mask-position: center;
	mask-position: center;
	-webkit-mask-size: contain;
	mask-size: contain;
}
.tick {
	position: absolute;
	top: 14px;
	right: 16px;
	width: 20px;
	height: 20px;
	background: var(--success);
	-webkit-mask-image: url("assets/images/icon-tick-20.svg");
	mask-image: url("assets/images/icon-tick-20.svg");
	pointer-events: none;
}
.ico-alert {
	width: 16px;
	height: 16px;
	background: var(--error);
	-webkit-mask-image: url("assets/images/icon-alert.svg");
	mask-image: url("assets/images/icon-alert.svg");
}
.eye i {
	width: 20px;
	height: 20px;
	background: var(--text-2);
	-webkit-mask-image: url("assets/images/icon-eye.svg");
	mask-image: url("assets/images/icon-eye.svg");
}
.eye[aria-pressed="true"] i {
	background: var(--accent);
	-webkit-mask-image: url("assets/images/icon-eye-off.svg");
	mask-image: url("assets/images/icon-eye-off.svg");
}

/* ---------- Layout ---------- */

/* Clips the oversized backdrop and effect layers sideways so they never add scroll. */
.clip {
	position: relative;
	flex: 1;
	display: flex;
	overflow: clip;
}

.page {
	position: relative;
	z-index: 1;
	flex: 1;
	display: grid;
	gap: 32px;
	align-content: start;
	width: 100%;
	max-width: 640px;
	margin: 0 auto;
	padding: 24px 16px 48px;
}

.brand {
	position: relative;
}

.brand__top {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
}

.brand__logo {
	height: 32px;
	width: auto;
}
.logo-ring {
	stroke: var(--accent);
	fill: none;
}
.logo-dot {
	fill: var(--accent);
}
.logo-text {
	fill: var(--text);
}

.brand__ready,
.readout__ready {
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text-4);
	transition: color 0.2s;
}
.brand__ready.is-complete,
.readout__ready.is-complete {
	color: var(--success);
	text-shadow: var(--tshadow-success);
}

.brand__title {
	margin-top: 32px;
	font-family: var(--font-display);
	font-weight: 800;
	font-size: 2.25rem;
	line-height: 1.1111;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--text);
	text-shadow: var(--tshadow-title);
}
.brand__slashes {
	margin-right: 0.12em;
	color: var(--accent);
	text-shadow: var(--tshadow-accent);
}

.brand__tagline {
	margin-top: 16px;
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text-2);
}

/* Operator ID readout. Mobile/tablet: a one-line strip. */
.readout {
	display: grid;
	grid-template-columns: 1fr auto;
	grid-template-areas: "label name";
	align-items: baseline;
	gap: 8px 16px;
	margin-top: 24px;
	padding-top: 16px;
	border-top: 1px solid var(--line);
}
.readout__label {
	grid-area: label;
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text-4);
}
.readout__ready {
	display: none;
	grid-area: ready;
	text-align: right;
}
.readout__name {
	grid-area: name;
	max-width: 100%;
	overflow-wrap: anywhere;
	text-align: right;
	font-family: var(--font-mono);
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	color: var(--text-4);
}
.readout__name.is-unassigned {
	text-transform: uppercase;
}
.readout__name:not(.is-unassigned) {
	color: var(--text);
}
.readout__rows {
	display: none;
	grid-area: rows;
	list-style: none;
	padding: 0;
}

.readout__rows li {
	display: flex;
	align-items: center;
	gap: 12px;
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text-2);
	padding-block: 4px;
}
.readout__rows i {
	flex: 1;
	min-width: 16px;
	border-bottom: 1px dotted var(--line-strong);
}
.readout__rows b {
	font-weight: 400;
	color: var(--text-4);
}
.readout__rows b.is-ok {
	color: var(--success);
}
.readout__rows b.is-error {
	color: var(--error);
}
.readout__rows b.is-locked {
	color: var(--text-2);
}

/* ---------- Backdrop shapes (one shows per theme, wide screens only) ---------- */

.panel-wrap {
	position: relative;
}
.backdrop {
	display: none;
	position: absolute;
	left: 100%;
	top: 50%;
	z-index: 0;
	width: 960px;
	height: 960px;
	transform: translate(-50%, -50%);
	pointer-events: none;
}
.bd-line {
	stroke: var(--backdrop-line);
}
.bd-accent {
	stroke: var(--accent);
}

/* ---------- Panel ---------- */

.panel {
	position: relative;
	z-index: 1;
	min-height: 0;
	padding: 20px;
	background: var(--surface);
	border: 1px solid var(--panel-border);
	box-shadow: var(--shadow-panel);
}

/* Corner brackets */
.panel::before,
.panel::after {
	content: "";
	position: absolute;
	width: 24px;
	height: 24px;
	pointer-events: none;
	filter: var(--bracket-filter);
}
.panel::before {
	top: -1px;
	left: -1px;
	border-top: 2px solid var(--accent);
	border-left: 2px solid var(--accent);
}
.panel::after {
	right: -1px;
	bottom: -1px;
	border-right: 2px solid var(--accent);
	border-bottom: 2px solid var(--accent);
}

.form__head {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 16px;
	margin-bottom: 24px;
	padding-bottom: 16px;
	border-bottom: 1px solid var(--line);
}
.form__title {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	font-weight: 700;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text);
}
.form__note {
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text-4);
}

/* ---------- Fields ---------- */

.field {
	margin-bottom: 24px;
}

.label {
	display: block;
	margin-bottom: 8px;
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text-2);
}
.label span {
	color: var(--accent);
}

.control {
	position: relative;
}

.control input {
	display: block;
	width: 100%;
	height: 48px;
	padding: 0 16px;
	background: var(--field);
	border: 1px solid var(--text-3);
	color: var(--text);
	font-family: var(--font-mono);
	font-size: 1rem;
	line-height: 1.5;
	caret-color: var(--accent);
	transition: border-color 0.15s;
}
.control input::placeholder {
	color: var(--text-4);
	opacity: 1;
}
.control input:hover {
	border-color: var(--text-2);
}
.control input:focus-visible,
.control input:focus {
	outline: 2px solid var(--accent);
	outline-offset: 2px;
	border-color: var(--accent);
	box-shadow: var(--shadow-focus);
}
.control input[type="password"] {
	letter-spacing: 0.16em;
}
.control input[readonly] {
	color: var(--text-2);
	cursor: not-allowed;
}

/* Autofill: keep the theme */
.control input:-webkit-autofill,
.control input:-webkit-autofill:hover,
.control input:-webkit-autofill:focus {
	-webkit-text-fill-color: var(--text);
	box-shadow: 0 0 0 1000px var(--field) inset;
	caret-color: var(--accent);
}

.field[data-state="error"] .control input {
	border-color: var(--error);
}
.field[data-state="error"] .control input:focus {
	border-color: var(--error);
}

.control--password input {
	padding-right: 48px;
}
.control--password .tick {
	right: 52px;
}
.field[data-state="valid"] .control--password input {
	padding-right: 80px;
}
.field[data-state="valid"] .control:not(.control--password) input {
	padding-right: 48px;
}

.eye {
	position: absolute;
	top: 4px;
	right: 4px;
	display: grid;
	place-items: center;
	width: 40px;
	height: 40px;
	padding: 0;
	background: transparent;
	border: 1px solid transparent;
	cursor: pointer;
	transition: background-color 0.15s, border-color 0.15s;
}
.eye:hover {
	background: var(--surface-2);
}
.eye:disabled {
	cursor: not-allowed;
	opacity: 0.5;
}

.hint,
.error {
	margin-top: 8px;
	font-size: 0.75rem;
	line-height: 1.3333;
	min-height: 16px;
}
.hint {
	color: var(--text-3);
}
.error {
	display: flex;
	align-items: flex-start;
	gap: 8px;
	color: var(--error);
}

/* Password strength */
.meter {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 4px;
	margin-top: 8px;
	--meter-color: var(--line);
}
.meter span {
	height: 4px;
	background: var(--line);
	transition: background-color 0.2s;
}
.meter[data-level="1"] span:nth-child(-n + 1),
.meter[data-level="2"] span:nth-child(-n + 2),
.meter[data-level="3"] span:nth-child(-n + 3),
.meter[data-level="4"] span:nth-child(-n + 4) {
	background: var(--meter-color);
}
.meter[data-level="1"] {
	--meter-color: var(--error);
}
.meter[data-level="2"] {
	--meter-color: var(--warn);
}
.meter[data-level="3"] {
	--meter-color: var(--accent);
}
.meter[data-level="4"] {
	--meter-color: var(--success);
}

.meta {
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 16px;
}
.meta__msg {
	flex: 1;
	min-width: 0;
}
.strength {
	margin-top: 8px;
	font-size: 0.75rem;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	text-align: right;
	color: var(--text-3);
}
.strength[data-level="1"] {
	color: var(--error);
}
.strength[data-level="2"] {
	color: var(--warn);
}
.strength[data-level="3"] {
	color: var(--accent);
}
.strength[data-level="4"] {
	color: var(--success);
}

/* Terms checkbox */
.field--terms {
	margin-bottom: 24px;
}
.terms {
	display: flex;
	align-items: flex-start;
	gap: 12px;
}
.terms input {
	flex: none;
	appearance: none;
	-webkit-appearance: none;
	width: 24px;
	height: 24px;
	margin: 0;
	background: var(--field) center / 16px 16px no-repeat;
	border: 1px solid var(--text-2);
	cursor: pointer;
	transition: border-color 0.15s, background-color 0.15s;
}
.terms input:hover {
	border-color: var(--accent);
}
.terms input:checked {
	background-color: var(--accent);
	background-image: url("assets/images/icon-tick-16.svg");
	border-color: var(--accent);
}
.terms input[aria-invalid="true"] {
	border-color: var(--error);
}
.terms input:disabled {
	cursor: not-allowed;
	opacity: 0.6;
}
.terms label {
	font-size: 0.875rem;
	line-height: 1.7143;
	color: var(--text-2);
	cursor: pointer;
}

a {
	color: var(--accent);
	text-decoration: none;
	border-bottom: 1px dotted var(--accent);
	transition: color 0.15s;
}
a:hover {
	color: var(--text-hi);
	border-bottom-style: solid;
	border-bottom-color: var(--text-hi);
}

/* ---------- Buttons ---------- */

.btn {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 48px;
	padding: 0 16px;
	background: var(--accent);
	border: 1px solid var(--accent);
	color: var(--accent-ink);
	font-family: var(--font-mono);
	font-size: 0.875rem;
	font-weight: 700;
	line-height: 1.7143;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	cursor: pointer;
	box-shadow: var(--shadow-btn);
	transition: background-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.btn:hover {
	background: var(--btn-hover-bg);
	border-color: var(--btn-hover-bg);
	color: var(--accent-ink);
	box-shadow: var(--shadow-btn-hover);
}
.btn:active {
	transform: translateY(1px);
	box-shadow: var(--shadow-btn-active);
}
.btn.is-loading,
.btn.is-loading:hover {
	background: transparent;
	border-color: var(--accent);
	color: var(--accent);
	box-shadow: none;
	transform: none;
	cursor: progress;
}
.btn--link {
	text-decoration: none;
	margin-top: 24px;
}
.btn--link:hover {
	border-bottom: 1px solid var(--btn-hover-bg);
}

.form__foot {
	margin-top: 24px;
	text-align: center;
	color: var(--text-2);
}

/* ---------- Success ---------- */

.success {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	justify-content: center;
	min-height: inherit;
	padding-block: 24px;
}
.success__icon {
	/* The SVG has built-in padding; pull the hex flush with the text edge. */
	margin: 0 0 16px -16px;
	filter: drop-shadow(0 0 16px var(--success-a60));
}
.success__icon path {
	stroke: var(--success);
}
.success__stamp {
	display: inline-block;
	margin-bottom: 12px;
	padding: 2px 10px;
	border: 1px solid var(--success);
	color: var(--success);
	font-size: 0.75rem;
	font-weight: 700;
	line-height: 1.3333;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	text-shadow: var(--tshadow-stamp);
	box-shadow: var(--shadow-stamp);
	transform: rotate(-2deg);
}
.success__title {
	font-family: var(--font-display);
	font-weight: 800;
	font-size: 1.5rem;
	line-height: 1.3333;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--text);
}
.success__title span {
	color: var(--accent);
}
.success__title:focus {
	outline: none;
}
.success__title:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 4px;
}
.success__text {
	margin-top: 16px;
	color: var(--text-2);
	overflow-wrap: anywhere;
}
.success__text strong {
	font-weight: 400;
	color: var(--accent);
}
.success__log {
	list-style: none;
	margin-top: 16px;
	padding: 0;
	font-size: 0.75rem;
	line-height: 1.8;
	color: var(--text-3);
}
.success__log .gt {
	color: var(--accent);
}
.success__log .ok {
	color: var(--success);
}
.success .btn {
	width: 100%;
}

/* ---------- Footer ---------- */

.attribution {
	padding: 24px 16px 32px;
	text-align: center;
	font-size: 0.75rem;
	line-height: 1.6;
	color: var(--text-3);
}
.attribution a {
	margin-left: 4px;
}

/* ---------- Back to main site ---------- */

.back {
	--text: var(--on-bg);
	--accent: var(--on-bg-accent);
	justify-self: start;
	padding: 8px 14px;
	border: 1px solid var(--on-bg-line-strong);
	background: color-mix(in srgb, var(--bg) 75%, transparent);
	color: var(--on-bg);
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	text-decoration: none;
}
.back:hover {
	border-color: var(--on-bg-accent);
	color: var(--on-bg-accent);
}

/* ---------- Theme dock ---------- */

.dock {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 8px 12px;
	margin: 0 16px;
	padding: 8px 12px;
	border: 0;
	font-size: 0.75rem;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--text-3);
}
.dock__chips {
	display: flex;
	gap: 8px;
}
.chip {
	position: relative;
	cursor: pointer;
}
.chip input {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	margin: 0;
	opacity: 0;
	cursor: pointer;
}
.chip__sw {
	display: grid;
	grid-template-columns: 1fr 1fr 1fr;
	width: 44px;
	height: 28px;
	border: 2px solid var(--text-2);
	overflow: hidden;
	transition: transform 0.15s;
}
.chip__sw i {
	display: block;
}
.chip:hover .chip__sw {
	transform: translateY(-2px);
}
.chip input:checked + .chip__sw {
	outline: 2px solid var(--accent);
	outline-offset: 2px;
	border-color: var(--accent);
}
.chip input:focus-visible + .chip__sw {
	outline: 3px solid var(--accent);
	outline-offset: 3px;
}
.dock__name {
	min-width: 9ch;
}

/* ================= Effects (all gated by data-fx) ================= */

.fx {
	display: none;
	pointer-events: none;
}

/* grid: perspective floor */
html[data-fx~="grid"] .fx-grid {
	display: block;
	position: absolute;
	left: -50%;
	bottom: 0;
	z-index: 0;
	width: 200%;
	height: 55%;
	background:
		linear-gradient(var(--accent-a40) 1px, transparent 1px) 0 0 / 64px 64px,
		linear-gradient(90deg, var(--accent-a40) 1px, transparent 1px) 0 0 / 64px 64px;
	transform: perspective(420px) rotateX(62deg);
	transform-origin: center bottom;
	opacity: 0.65;
	-webkit-mask-image: linear-gradient(to top, #000 10%, transparent 90%);
	mask-image: linear-gradient(to top, #000 10%, transparent 90%);
}

/* scanlines + vignette share one overlay so they composite together */
html[data-fx~="scanlines"] .fx-scan,
html[data-fx~="vignette"] .fx-scan {
	display: block;
	position: fixed;
	inset: 0;
	z-index: 50;
	opacity: var(--scan-opacity);
	background: var(--fx-lines, none), var(--fx-vig, none);
}
html[data-fx~="scanlines"] {
	--fx-lines: repeating-linear-gradient(to bottom, hsl(0 0% 0% / 0.16) 0 1px, transparent 1px 3px);
}
html[data-fx~="vignette"] {
	--fx-vig: radial-gradient(ellipse at center, transparent 55%, var(--vignette) 100%);
}

/* grain: animated film grain */
html[data-fx~="grain"] .fx-grain {
	display: block;
	position: fixed;
	inset: -50%;
	z-index: 51;
	opacity: 0.09;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* flicker: faint CRT pulse */
html[data-fx~="flicker"] .fx-flicker {
	display: block;
	position: fixed;
	inset: 0;
	z-index: 52;
	background: hsl(210 100% 80% / 0.035);
	opacity: 0;
}

/* spotlight: light cone onto the panel */
html[data-fx~="spotlight"] .fx-spot {
	display: block;
	position: absolute;
	top: -10%;
	left: 55%;
	z-index: 0;
	width: 120%;
	height: 130%;
	transform: translateX(-50%);
	background:
		radial-gradient(ellipse 38% 34% at 50% 52%, hsl(40 40% 92% / 0.1), transparent 70%),
		conic-gradient(from 180deg at 50% 0%, transparent 156deg, hsl(40 40% 92% / 0.1) 172deg, hsl(40 40% 92% / 0.1) 188deg, transparent 204deg);
	-webkit-mask-image: linear-gradient(to bottom, #000 40%, transparent 95%);
	mask-image: linear-gradient(to bottom, #000 40%, transparent 95%);
}

/* rain: falling binary, behind the brand column (wide screens) */
.fx-rain {
	position: absolute;
	left: 0;
	top: 0;
	bottom: 0;
	width: 46%;
	overflow: hidden;
	-webkit-mask-image: linear-gradient(to bottom, transparent, #000 25%, #000 70%, transparent);
	mask-image: linear-gradient(to bottom, transparent, #000 25%, #000 70%, transparent);
}
.fx-rain span {
	position: absolute;
	top: 0;
	writing-mode: vertical-rl;
	text-orientation: upright;
	font-size: 13px;
	line-height: 1.2;
	letter-spacing: 0.1em;
	color: var(--accent);
	opacity: 0.15;
}

/* hazard stripes on the panel's top edge */
html[data-fx~="hazard"] .panel {
	background-image: repeating-linear-gradient(-45deg, var(--accent) 0 8px, var(--surface) 8px 16px);
	background-size: 100% 8px;
	background-repeat: no-repeat;
	background-position: top;
	background-color: var(--surface);
}

/* tape: caution ticker above the page */
html[data-fx~="tape"] .fx-tape {
	display: block;
	position: relative;
	z-index: 2;
	overflow: hidden;
	background: hsl(0 0% 4%);
}
.tape__stripe {
	height: 8px;
	background: repeating-linear-gradient(-45deg, var(--accent) 0 8px, hsl(0 0% 4%) 8px 16px);
}
.tape__text {
	display: flex;
	width: max-content;
	padding: 4px 0;
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: var(--accent);
	white-space: nowrap;
}

/* holo: iridescent animated panel border */
html[data-fx~="holo"] .panel {
	border-color: transparent;
	background:
		linear-gradient(var(--surface), var(--surface)) padding-box,
		conic-gradient(from var(--ang), var(--accent), var(--success), hsl(265 100% 70%), var(--accent)) border-box;
}

/* kana: vertical katakana beside the brand column */
.brand__kana {
	display: none;
}
@media (min-width: 1280px) {
	html[data-fx~="kana"] .brand__kana {
		display: block;
		position: absolute;
		top: 50%;
		left: -56px;
		transform: translateY(-50%);
		writing-mode: vertical-rl;
		white-space: nowrap;
		font-family: var(--font-mono), "Hiragino Sans", "Noto Sans JP", sans-serif;
		font-size: 0.875rem;
		letter-spacing: 0.5em;
		color: var(--accent-a60);
		text-shadow: var(--tshadow-kana);
		user-select: none;
	}
}

/* ---------- Theme switch transition overlay ---------- */

.wipe {
	position: fixed;
	inset: 0;
	z-index: 100;
	overflow: hidden;
	pointer-events: none;
}
.wipe::before,
.wipe::after {
	content: "";
	position: absolute;
	inset: 0;
}

/* glitch: RGB-split slab sweeps across */
.wipe[data-type="glitch"]::before {
	background: var(--wipe-a);
	clip-path: inset(0 100% 0 0);
	animation: wipe-slab 0.7s cubic-bezier(0.7, 0, 0.3, 1) both;
}
.wipe[data-type="glitch"]::after {
	background: var(--wipe-b);
	clip-path: inset(0 100% 0 0);
	transform: translateX(14px);
	mix-blend-mode: screen;
	animation: wipe-slab 0.7s 0.06s cubic-bezier(0.7, 0, 0.3, 1) both;
}

/* hazard: diagonal stripes slide through */
.wipe[data-type="hazard"]::before {
	left: -30%;
	right: -30%;
	background: repeating-linear-gradient(-45deg, var(--wipe-bg) 0 36px, #0d0d0d 36px 72px);
	transform: translateX(-100%);
	animation: wipe-slide 0.7s cubic-bezier(0.7, 0, 0.3, 1) both;
}

/* scan: a bright line sweeps down, leaving cover behind it */
.wipe[data-type="scan"]::before {
	background: linear-gradient(to bottom, var(--wipe-bg) 96%, var(--wipe-a) 98%, var(--wipe-b) 100%);
	clip-path: inset(0 0 100% 0);
	animation: wipe-down 0.7s cubic-bezier(0.7, 0, 0.3, 1) both;
}

/* iris: a gun-barrel circle closes, then reopens */
.wipe[data-type="iris"]::before {
	background:
		radial-gradient(circle at 50% 50%, transparent calc(var(--iris) - 0.4%), var(--wipe-a) calc(var(--iris) - 0.4%), var(--wipe-a) var(--iris), #000 var(--iris));
	animation: wipe-iris 0.7s cubic-bezier(0.7, 0, 0.3, 1) both;
}

@keyframes wipe-slab {
	0% { clip-path: inset(0 100% 0 0); }
	50% { clip-path: inset(0 0 0 0); }
	100% { clip-path: inset(0 0 0 100%); }
}
@keyframes wipe-slide {
	0% { transform: translateX(-100%); }
	50% { transform: translateX(0); }
	100% { transform: translateX(100%); }
}
@keyframes wipe-down {
	0% { clip-path: inset(0 0 100% 0); }
	50% { clip-path: inset(0 0 0 0); }
	100% { clip-path: inset(100% 0 0 0); }
}
@keyframes wipe-iris {
	0% { --iris: 150%; }
	50% { --iris: 0%; }
	100% { --iris: 150%; }
}

/* ---------- Motion ---------- */

@keyframes shake {
	0%, 100% { transform: translateX(0); }
	20% { transform: translateX(-8px); }
	40% { transform: translateX(8px); }
	60% { transform: translateX(-6px); }
	80% { transform: translateX(6px); }
}
@keyframes glitch {
	0%, 100% {
		text-shadow: var(--tshadow-title);
		transform: none;
	}
	10% {
		text-shadow: -3px 0 var(--glitch-a), 3px 0 var(--glitch-b);
		transform: translateX(-2px) skewX(-4deg);
	}
	22% {
		text-shadow: 3px 0 var(--glitch-a), -3px 0 var(--glitch-b);
		transform: translateX(3px);
	}
	34% {
		text-shadow: -2px 0 var(--glitch-b), 2px 0 var(--glitch-a);
		transform: translateX(-1px) skewX(3deg);
	}
	46% {
		text-shadow: var(--tshadow-title);
		transform: none;
	}
}
@keyframes glitch-b {
	0%, 100% {
		text-shadow: var(--tshadow-title);
		transform: none;
	}
	10% {
		text-shadow: -3px 0 var(--glitch-a), 3px 0 var(--glitch-b);
		transform: translateX(-2px) skewX(-4deg);
	}
	22% {
		text-shadow: 3px 0 var(--glitch-a), -3px 0 var(--glitch-b);
		transform: translateX(3px);
	}
	34% {
		text-shadow: -2px 0 var(--glitch-b), 2px 0 var(--glitch-a);
		transform: translateX(-1px) skewX(3deg);
	}
	46% {
		text-shadow: var(--tshadow-title);
		transform: none;
	}
}
@keyframes log-in {
	to {
		opacity: 1;
	}
}
@keyframes rgb-flash {
	0%, 100% {
		box-shadow: var(--shadow-panel);
	}
	30% {
		box-shadow: -6px 0 0 var(--glitch-a), 6px 0 0 var(--glitch-b);
	}
	60% {
		box-shadow: 6px 0 0 var(--glitch-a), -6px 0 0 var(--glitch-b);
	}
}
@keyframes rain-fall {
	from { transform: translateY(-50%); }
	to { transform: translateY(0); }
}
@keyframes tape-scroll {
	from { transform: translateX(0); }
	to { transform: translateX(-50%); }
}
@keyframes grain-shift {
	0% { transform: translate(0, 0); }
	20% { transform: translate(-3%, 2%); }
	40% { transform: translate(2%, -3%); }
	60% { transform: translate(-2%, -1%); }
	80% { transform: translate(3%, 3%); }
	100% { transform: translate(0, 0); }
}
@keyframes flicker {
	0%, 100% { opacity: 0; }
	8% { opacity: 1; }
	10% { opacity: 0.2; }
	44% { opacity: 0; }
	46% { opacity: 0.8; }
	48% { opacity: 0; }
	78% { opacity: 0.5; }
	80% { opacity: 0; }
}
@keyframes holo-spin {
	to { --ang: 360deg; }
}

@media (prefers-reduced-motion: no-preference) {
	.panel.is-shaking {
		animation: shake 0.4s ease-in-out;
	}
	html[data-fx~="glitch"] .panel.is-shaking {
		animation: shake 0.4s ease-in-out, rgb-flash 0.4s linear;
	}
	html[data-fx~="glitch"] .brand__title {
		animation: glitch 0.9s 0.5s 1 both;
	}
	html[data-fx~="glitch"] .brand__title:hover {
		animation: glitch-b 0.6s 1;
	}
	html[data-fx~="glitch"] .success__title {
		animation: glitch-b 0.9s 0.2s 1 both;
	}
	.success__log li {
		opacity: 0;
		animation: log-in 0.01s forwards;
		animation-delay: calc(0.7s + var(--i, 0) * 0.45s);
	}
	.fx-rain span {
		height: 200%;
		animation: rain-fall var(--dur, 18s) linear infinite;
	}
	html[data-fx~="tape"] .tape__text {
		animation: tape-scroll 28s linear infinite;
	}
	html[data-fx~="grain"] .fx-grain {
		animation: grain-shift 0.9s steps(5) infinite;
	}
	html[data-fx~="flicker"] .fx-flicker {
		animation: flicker 5s linear infinite;
	}
	html[data-fx~="holo"] .panel {
		animation: holo-spin 7s linear infinite;
	}
	html[data-fx~="holo"] .panel.is-shaking {
		animation: holo-spin 7s linear infinite, shake 0.4s ease-in-out;
	}
}
@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		transition-duration: 0.01ms !important;
		animation-duration: 0.01ms !important;
	}
	.btn:active {
		transform: none;
	}
	.chip:hover .chip__sw {
		transform: none;
	}
}

/* ---------- Tablet ---------- */

@media (min-width: 768px) {
	.page {
		padding: 48px 32px 64px;
		gap: 40px;
	}
	.brand__title {
		font-size: 2.5rem;
		line-height: 1.2;
	}
	.panel {
		padding: 40px;
	}
}

/* ---------- Desktop ---------- */

@media (min-width: 1100px) {
	.mobile-only {
		display: none;
	}
	.desktop-only {
		display: inline;
	}

	.page {
		grid-template-columns: minmax(0, 1fr) 480px;
		align-items: center;
		column-gap: 80px;
		max-width: 1120px;
		min-height: calc(100vh - 80px);
		padding: 88px 0;
	}

	.brand__ready {
		display: none;
	}
	.brand__logo {
		height: 32px;
	}
	.brand__title {
		margin-top: 80px;
		font-size: clamp(2.75rem, 5vw, 4.5rem);
		line-height: 1.1111;
	}
	.brand__tagline {
		margin-top: 32px;
	}

	.readout {
		grid-template-columns: 1fr auto;
		grid-template-areas:
			"label ready"
			"name name"
			"rows rows";
		max-width: 560px;
		margin-top: 72px;
		padding-top: 24px;
		gap: 8px 16px;
	}
	.readout__ready {
		display: block;
	}
	.readout__name {
		text-align: left;
		font-family: var(--font-display);
		font-weight: 800;
		font-size: 1.5rem;
		line-height: 1.3333;
		letter-spacing: 0.04em;
	}
	.readout__rows {
		display: block;
		margin-top: 8px;
	}

	/* Backdrop shapes: the data-backdrop attribute picks which one shows */
	html[data-backdrop="hex"] .backdrop--hex,
	html[data-backdrop="barrel"] .backdrop--barrel {
		display: block;
	}

	html[data-fx~="rain"] .fx-rain {
		display: block;
	}

	/* Theme dock floats above the panel (below the caution tape when it is showing) */
	html[data-fx~="tape"] .dock {
		top: 52px;
	}
	html[data-fx~="tape"] .back {
		top: 52px;
	}
	.back {
		position: fixed;
		top: 16px;
		left: 16px;
		z-index: 55;
	}
	.dock {
		position: fixed;
		top: 16px;
		right: 16px;
		z-index: 55;
		flex-wrap: nowrap;
		margin: 0;
		background: color-mix(in srgb, var(--bg) 75%, transparent);
	}
}