/**
 * Page styles for /start/ (the project brief wizard — plans/09).
 *
 * Ink header band, then a paper body holding one undecorated form + a quiet
 * "what happens next" aside. The step-through is progressive enhancement, so the
 * layout is complete with every fieldset stacked (no JS) and simply shows one at
 * a time once start-wizard.js runs. Forms carry NO decoration (Direction §4).
 *
 * The scoped `[hidden] { display:none !important }` guarantees the hidden
 * attribute always beats the layout display rules below when the wizard hides a
 * step, a nav button, or the whole form on success.
 *
 * Built by Zinuxtech (ZX · Zinux) to the ZinuxTech Development Guide.
 */

.start [hidden] {
	display: none !important;
}

/* --- Header (ink) --------------------------------------------------------- */

.start-hero {
	position: relative;
	overflow: hidden;
	padding-block: calc(var(--inv-header-height) + var(--inv-space-xl)) var(--inv-space-2xl);
	background: var(--inv-ink) var(--inv-backdrop) center / cover no-repeat;
	color: var(--inv-text-inv);
}

.start-hero__inner {
	position: relative;
	z-index: 1;
	display: grid;
	gap: var(--inv-space-md);
}

.start-hero__title {
	max-width: 20ch;
	font-size: clamp(2.75rem, 1.8rem + 4.5vw, 5rem);
	line-height: 1;
}

.start-hero__title::after {
	display: inline-block;
	width: 0.12em;
	height: 0.12em;
	margin-left: 0.06em;
	border-radius: 50%;
	background: var(--inv-signal);
	content: "";
}

/* --- Body (paper) --------------------------------------------------------- */

.start-body {
	padding-block: var(--inv-sect);
	background: var(--inv-paper);
}

.start-body__inner {
	display: grid;
	gap: var(--inv-space-2xl);
}

@media (min-width: 60rem) {
	.start-body__inner {
		grid-template-columns: minmax(0, 1.55fr) minmax(15rem, 0.75fr);
		gap: var(--inv-space-2xl);
		align-items: start;
	}

	/* The aside precedes the form in source for a sensible no-JS reading order
	   on narrow screens, but sits to the right on desktop. */
	.start-aside {
		order: 2;
	}
}

/* --- The form ------------------------------------------------------------- */

.start-form {
	display: grid;
	gap: var(--inv-space-xl);
}

.start-form__progress {
	color: var(--inv-muted);
	font-family: var(--inv-font-mono);
	font-size: 0.6875rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}

.start-step {
	display: grid;
	gap: var(--inv-space-lg);
	margin: 0;
	padding: 0;
	border: 0;
}

.start-step__legend {
	display: flex;
	align-items: baseline;
	gap: var(--inv-space-sm);
	padding: 0;
	font-family: var(--inv-font-display);
	font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem);
	font-weight: 800;
	letter-spacing: -0.02em;
	line-height: 1.1;
}

.start-step__num {
	color: var(--inv-signal-deep);
	font-family: var(--inv-font-mono);
	font-size: 0.8rem;
	font-weight: 700;
	letter-spacing: 0.1em;
}

/* Fields */

.start-field {
	display: grid;
	gap: var(--inv-space-2xs);
}

.start-field > label,
.start-field__label {
	font-family: var(--inv-font-mono);
	font-size: 0.625rem;
	font-weight: 700;
	letter-spacing: 0.07em;
	text-transform: uppercase;
	color: var(--inv-muted);
}

.start-field input,
.start-field textarea {
	width: 100%;
	padding: 0.65rem 0;
	border: 0;
	border-bottom: 1px solid var(--inv-line);
	border-radius: 0;
	background: transparent;
	color: var(--inv-text);
	font-size: 1.05rem;
	outline: none;
	transition: border-color var(--inv-duration-fast) var(--inv-ease);
}

.start-field input {
	min-height: 2.75rem;
}

.start-field textarea {
	min-height: 5rem;
	padding-top: var(--inv-space-xs);
	resize: vertical;
}

.start-field input::placeholder,
.start-field textarea::placeholder {
	color: var(--inv-muted);
	opacity: 0.6;
}

.start-field input:focus,
.start-field textarea:focus {
	border-color: var(--inv-signal-deep);
}

.start-field [aria-invalid="true"] {
	border-color: var(--inv-signal-deep);
	box-shadow: 0 0.25rem 0 -0.13rem var(--inv-signal-deep);
}

/* Choice cards (radio slate-cards) */

.start-choice {
	display: grid;
	gap: var(--inv-space-xs);
}

.start-choice--inline {
	grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
}

.start-choice__card {
	position: relative;
	display: block;
	cursor: pointer;
}

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

.start-choice__label {
	display: block;
	padding: 0.9rem 1.1rem;
	border: 1px solid var(--inv-line);
	border-radius: var(--inv-radius-md);
	background: var(--inv-white);
	color: var(--inv-text);
	font-size: 1rem;
	transition: border-color var(--inv-duration-fast) var(--inv-ease), box-shadow var(--inv-duration-fast) var(--inv-ease);
}

.start-choice__card--pill .start-choice__label {
	padding: 0.7rem 0.9rem;
	text-align: center;
	font-family: var(--inv-font-mono);
	font-size: 0.8rem;
	font-weight: 700;
}

.start-choice__card:hover .start-choice__label {
	border-color: var(--inv-ink);
}

.start-choice__card input:checked + .start-choice__label {
	border-color: var(--inv-ink);
	box-shadow: inset 0 0 0 1px var(--inv-ink), -0.4rem 0 0 0 var(--inv-signal);
}

.start-choice__card input:focus-visible + .start-choice__label {
	outline: 2px solid var(--inv-signal-deep);
	outline-offset: 2px;
}

/* Nav */

.start-form__nav {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--inv-space-sm);
}

.start-form__nav [data-start-next],
.start-form__nav [data-start-submit] {
	margin-left: auto;
}

.start-form__nav [data-start-back] ~ [data-start-next],
.start-form__nav [data-start-back] ~ [data-start-submit] {
	margin-left: 0;
}

.start-form__nav .button--text {
	color: var(--inv-ink);
}

.start-form__nav .button--text:hover {
	color: var(--inv-signal-deep);
}

.start-form__nav button:disabled {
	cursor: wait;
	opacity: 0.72;
}

.start-form__status {
	color: var(--inv-muted);
	font-size: 0.85rem;
}

.start-form__honeypot {
	position: absolute;
	left: -10000px;
	width: 1px;
	height: 1px;
	overflow: hidden;
}

/* Success confirmation (JS replaces the form with this) */

.start-confirm {
	display: grid;
	gap: var(--inv-space-sm);
	padding: clamp(1.5rem, 4vw, 2.75rem);
	border: 1px solid var(--inv-ink);
	border-radius: var(--inv-radius-lg);
	background: var(--inv-ink);
	color: var(--inv-text-inv);
}

.start-confirm__slate {
	color: var(--inv-signal);
	font-family: var(--inv-font-mono);
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}

.start-confirm__line {
	max-width: 34ch;
	font-family: var(--inv-font-display);
	font-size: clamp(1.4rem, 1rem + 1.6vw, 2rem);
	font-weight: 500;
	letter-spacing: -0.02em;
	line-height: 1.2;
}

/* Aside — what happens next */

.start-aside {
	display: grid;
	gap: var(--inv-space-md);
	padding: var(--inv-space-lg);
	border-left: 2px solid var(--inv-signal);
	background: var(--inv-paper-deep);
	border-radius: 0 var(--inv-radius-md) var(--inv-radius-md) 0;
}

.start-aside__slate {
	/* Ink, not muted: at 0.625rem the muted grey dips under WCAG AA on the aside
	   ground. This is the "What happens next" label — keep it legible (plans/12). */
	color: var(--inv-text);
	font-family: var(--inv-font-mono);
	font-size: 0.625rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}

.start-aside__list {
	display: grid;
	gap: var(--inv-space-md);
	margin: 0;
	padding: 0;
	list-style: none;
	counter-reset: start-aside;
}

.start-aside__list li {
	position: relative;
	padding-left: var(--inv-space-lg);
	color: var(--inv-text);
	font-size: 0.95rem;
	line-height: 1.5;
	counter-increment: start-aside;
}

.start-aside__list li::before {
	position: absolute;
	left: 0;
	top: 0;
	content: counter(start-aside, decimal-leading-zero);
	color: var(--inv-signal-deep);
	font-family: var(--inv-font-mono);
	font-size: 0.7rem;
	font-weight: 700;
}