/*
 * Footer — Block: ds-footer
 * Full-viewport neural footer for an AI studio.
 *
 * @package Dreamy_Signal
 */

.ds-footer {
	--dsf-fg: var(--ds-text, #fff);
	--dsf-bg: var(--ds-bg, #000);
	--dsf-muted: color-mix(in srgb, var(--dsf-fg) 46%, transparent);
	--dsf-faint: color-mix(in srgb, var(--dsf-fg) 26%, transparent);
	--dsf-line: color-mix(in srgb, var(--dsf-fg) 11%, transparent);
	--dsf-hair: color-mix(in srgb, var(--dsf-fg) 6%, transparent);
	--dsf-surface: color-mix(in srgb, var(--dsf-fg) 4%, transparent);

	background: var(--dsf-bg);
	box-sizing: border-box;
	color: var(--dsf-fg);
	display: flex;
	flex-direction: column;
	font-family: var(--ds-font-en), var(--ds-font-fa);
	height: 100vh;
	height: 100dvh;
	isolation: isolate;
	overflow: hidden;
	padding: clamp(1.1rem, 3vw, 2.2rem);
	position: relative;
	transition:
		background-color var(--ds-transition-duration, 700ms) ease,
		color var(--ds-transition-duration, 700ms) ease;
	width: 100%;
}

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

/* ================================================================== *
 * Atmosphere
 * ================================================================== */
.ds-footer__mesh {
	display: block;
	height: 100%;
	inset: 0;
	-webkit-mask-image: linear-gradient(180deg, transparent 0, #000 22%);
	mask-image: linear-gradient(180deg, transparent 0, #000 22%);
	max-height: 100%;
	max-width: 100%;
	pointer-events: none;
	position: absolute;
	width: 100%;
	z-index: 0;
}

.ds-footer__aurora {
	display: none;
}

.ds-footer__grid {
	background-image:
		linear-gradient(var(--dsf-hair) 1px, transparent 1px),
		linear-gradient(90deg, var(--dsf-hair) 1px, transparent 1px);
	background-size: 5.5vw 5.5vw;
	inset: 0;
	mask-image:
		linear-gradient(180deg, transparent 0, #000 22%),
		radial-gradient(circle at 50% 42%, #000 8%, transparent 76%);
	mask-composite: intersect;
	-webkit-mask-image:
		linear-gradient(180deg, transparent 0, #000 22%),
		radial-gradient(circle at 50% 42%, #000 8%, transparent 76%);
	-webkit-mask-composite: source-in;
	pointer-events: none;
	position: absolute;
	z-index: 0;
}

.ds-footer__frame {
	display: flex;
	flex: 1;
	flex-direction: column;
	min-height: 0;
	position: relative;
	z-index: 2;
}

/* ================================================================== *
 * Rail
 * ================================================================== */
.ds-footer__rail {
	align-items: center;
	border-bottom: 1px solid var(--dsf-hair);
	display: flex;
	gap: 1rem;
	justify-content: space-between;
	padding-bottom: 0.85rem;
}

.ds-footer__status,
.ds-footer__clock,
.ds-footer__chip,
.ds-footer__col-title,
.ds-footer__copyright,
.ds-footer__note,
.ds-footer__link,
.ds-footer__prompt-send {
	font-family: var(--ds-font-mono);
	letter-spacing: 0.16em;
	text-transform: uppercase;
}

.ds-footer__status,
.ds-footer__clock {
	align-items: center;
	color: var(--dsf-muted);
	display: inline-flex;
	font-size: 0.6rem;
	gap: 0.5rem;
	margin: 0;
	white-space: nowrap;
}

.ds-footer__pulse {
	background: var(--dsf-fg);
	border-radius: 50%;
	height: 6px;
	position: relative;
	width: 6px;
}

.ds-footer__pulse::after {
	animation: ds-footer-pulse 2.4s ease-out infinite;
	border: 1px solid var(--dsf-fg);
	border-radius: 50%;
	content: "";
	inset: 0;
	position: absolute;
}

/* ================================================================== *
 * Hero
 * ================================================================== */
.ds-footer__hero {
	display: flex;
	flex: 1;
	flex-direction: column;
	justify-content: center;
	gap: clamp(1.2rem, 3.4vh, 2.2rem);
	min-height: 0;
	padding-block: clamp(1rem, 3vh, 2rem);
}

.ds-footer__headline {
	display: flex;
	flex-direction: column;
	font-size: clamp(2.1rem, 6.2vw, 5.6rem);
	font-weight: 900;
	letter-spacing: -0.045em;
	line-height: 0.98;
	margin: 0;
	max-width: 15ch;
}

.ds-footer__line {
	display: block;
	overflow: hidden;
	padding-bottom: 0.06em;
}

.ds-footer__line-inner {
	display: block;
}

.ds-footer__line-inner--soft {
	color: transparent;
	-webkit-text-stroke: 1px var(--dsf-fg);
}

.ds-footer[dir="rtl"] .ds-footer__headline {
	font-family: var(--ds-font-fa);
	font-size: clamp(1.8rem, 5vw, 4.4rem);
	letter-spacing: -0.02em;
	line-height: 1.24;
	max-width: 17ch;
}

/* ----------------------------- Prompt ----------------------------- */
.ds-footer__prompt {
	align-items: center;
	backdrop-filter: blur(14px);
	-webkit-backdrop-filter: blur(14px);
	background: var(--dsf-surface);
	border: 1px solid var(--dsf-line);
	border-radius: 999px;
	display: flex;
	gap: 0.7rem;
	max-width: 46rem;
	padding: 0.45rem 0.45rem 0.45rem 1.1rem;
	position: relative;
	transition: border-color 0.35s ease, background-color 0.35s ease;
	width: 100%;
}

.ds-footer[dir="rtl"] .ds-footer__prompt {
	padding: 0.45rem 1.1rem 0.45rem 0.45rem;
}

.ds-footer__prompt:focus-within {
	background: color-mix(in srgb, var(--dsf-fg) 7%, transparent);
	border-color: color-mix(in srgb, var(--dsf-fg) 40%, transparent);
}

.ds-footer__prompt-mark {
	align-items: center;
	color: var(--dsf-muted);
	display: inline-flex;
	flex: 0 0 auto;
}

.ds-footer__prompt-mark svg {
	height: 1.05rem;
	width: 1.05rem;
}

.ds-footer__prompt-input {
	background: transparent;
	border: 0;
	color: var(--dsf-fg);
	flex: 1;
	font-family: inherit;
	font-size: clamp(0.82rem, 1.1vw, 0.95rem);
	font-weight: 500;
	min-width: 0;
	padding: 0.6rem 0;
}

.ds-footer__prompt-input::placeholder {
	color: var(--dsf-faint);
}

.ds-footer__prompt-input:focus {
	outline: none;
}

.ds-footer__prompt-send {
	align-items: center;
	background: var(--dsf-fg);
	border: 0;
	border-radius: 999px;
	color: var(--dsf-bg);
	cursor: pointer;
	display: inline-flex;
	flex: 0 0 auto;
	font-size: 0.6rem;
	font-weight: 500;
	gap: 0.6rem;
	padding: 0.7rem 1.15rem;
	transition: transform 0.3s ease;
}

.ds-footer__prompt-send:hover {
	transform: translateX(2px);
}

.ds-footer[dir="rtl"] .ds-footer__prompt-arrow {
	display: inline-block;
	transform: scaleX(-1);
}

/* ---------------------------- Marquee ---------------------------- */
.ds-footer__marquee {
	direction: ltr;
	mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
	-webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
	overflow: hidden;
}

.ds-footer__marquee-track {
	animation: ds-footer-marquee 42s linear infinite;
	display: flex;
	width: max-content;
}

.ds-footer__marquee-set {
	display: flex;
}

.ds-footer__chip {
	border: 1px solid var(--dsf-line);
	border-radius: 999px;
	color: var(--dsf-muted);
	font-size: 0.58rem;
	margin-inline-end: 0.5rem;
	padding: 0.42rem 0.9rem;
	white-space: nowrap;
}

/* ================================================================== *
 * Meta
 * ================================================================== */
.ds-footer__meta {
	border-top: 1px solid var(--dsf-hair);
	display: grid;
	gap: 1.4rem clamp(1.5rem, 4vw, 3.5rem);
	grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
	padding-block: 1.15rem;
}

.ds-footer__col {
	display: flex;
	flex-direction: column;
	gap: 0.45rem;
	min-width: 0;
}

.ds-footer__col-title {
	color: var(--dsf-faint);
	font-size: 0.55rem;
	margin: 0 0 0.3rem;
}

.ds-footer__copyright,
.ds-footer__note {
	color: var(--dsf-muted);
	font-size: 0.58rem;
	margin: 0;
}

.ds-footer__note {
	letter-spacing: 0.1em;
	max-width: 28ch;
}

.ds-footer__link {
	color: var(--dsf-fg);
	font-size: 0.62rem;
	letter-spacing: 0.1em;
	text-decoration: none;
	transition: opacity 0.25s ease;
	width: fit-content;
}

a.ds-footer__link:hover {
	text-decoration: underline;
	text-underline-offset: 0.3em;
}

.ds-footer__link--mute {
	color: var(--dsf-faint);
}

/* ================================================================== *
 * Watermark
 * ================================================================== */
.ds-footer__watermark {
	inset-inline: clamp(1.1rem, 3vw, 2.2rem);
	bottom: clamp(-0.5rem, -1vw, -0.2rem);
	line-height: 0.74;
	pointer-events: none;
	position: absolute;
	z-index: 1;
}

.ds-footer__watermark-text {
	background: linear-gradient(
		100deg,
		color-mix(in srgb, var(--dsf-fg) 12%, transparent) 0%,
		color-mix(in srgb, var(--dsf-fg) 12%, transparent) 38%,
		color-mix(in srgb, var(--dsf-fg) 42%, transparent) 50%,
		color-mix(in srgb, var(--dsf-fg) 12%, transparent) 62%,
		color-mix(in srgb, var(--dsf-fg) 12%, transparent) 100%
	);
	background-clip: text;
	-webkit-background-clip: text;
	background-size: 260% 100%;
	color: transparent;
	display: block;
	font-size: clamp(2.6rem, 15.5vw, 13.5rem);
	font-weight: 900;
	letter-spacing: -0.055em;
	text-align: center;
	text-transform: uppercase;
	white-space: nowrap;
}

.ds-footer__prompt-send:focus-visible,
.ds-footer__link:focus-visible,
.ds-footer__prompt-input:focus-visible {
	outline: 2px solid var(--dsf-fg);
	outline-offset: 3px;
}

/* ================================================================== *
 * Responsive
 * ================================================================== */
@media (max-width: 1080px) {
	.ds-footer__meta {
		grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(0, 1fr));
	}

	.ds-footer__col:last-child {
		grid-column: 2 / -1;
	}
}

@media (max-width: 900px) {
	.ds-footer {
		height: auto;
		min-height: 0;
		overflow: hidden;
		padding:
			clamp(1.1rem, 4vw, 1.8rem)
			clamp(1rem, 4vw, 1.6rem)
			0;
	}

	.ds-footer__frame,
	.ds-footer__hero {
		flex: none;
	}

	.ds-footer__headline,
	.ds-footer[dir="rtl"] .ds-footer__headline {
		font-size: clamp(2rem, 8.4vw, 3.6rem);
		line-height: 1.08;
		max-width: none;
	}

	.ds-footer__hero {
		gap: 1.35rem;
		justify-content: flex-start;
		padding-block: 1.1rem 0.85rem;
	}

	.ds-footer__meta {
		gap: 1.35rem 1.5rem;
		grid-template-columns: repeat(2, minmax(0, 1fr));
		padding-block: 1.25rem 0.4rem;
	}

	.ds-footer__col:last-child {
		grid-column: auto;
	}

	.ds-footer__col--legal {
		grid-column: 1 / -1;
		order: 8;
	}

	.ds-footer__watermark {
		bottom: auto;
		inset-inline: 0;
		line-height: 0.62;
		margin: 0;
		overflow: hidden;
		position: relative;
	}

	.ds-footer__watermark-text {
		display: block;
		font-size: clamp(1.55rem, 8.6vw, 2.8rem);
		line-height: 0.62;
		margin: 0;
	}
}

@media (max-width: 720px) {
	.ds-footer__rail {
		align-items: flex-start;
		flex-wrap: wrap;
		gap: 0.45rem 1rem;
	}

	.ds-footer__status,
	.ds-footer__clock {
		font-size: 0.58rem;
	}

	.ds-footer__prompt {
		max-width: none;
	}

	.ds-footer__prompt-input {
		font-size: 16px;
		min-height: 2.7rem;
	}

	.ds-footer__prompt-send {
		min-height: 2.7rem;
		padding-inline: 1.05rem;
	}

	.ds-footer__link {
		align-items: center;
		display: inline-flex;
		font-size: 0.78rem;
		letter-spacing: 0.06em;
		min-height: 2.65rem;
	}

	.ds-footer__col-title {
		font-size: 0.58rem;
		margin-bottom: 0.15rem;
	}

	.ds-footer__copyright,
	.ds-footer__note {
		font-size: 0.68rem;
		letter-spacing: 0.06em;
		max-width: none;
	}

	.ds-footer__chip {
		font-size: 0.56rem;
		padding: 0.4rem 0.8rem;
	}
}

@media (max-width: 560px) {
	.ds-footer__headline,
	.ds-footer[dir="rtl"] .ds-footer__headline {
		font-size: clamp(1.85rem, 9.2vw, 2.55rem);
		letter-spacing: -0.03em;
	}

	.ds-footer__prompt {
		align-items: stretch;
		border-radius: 20px;
		flex-direction: column;
		gap: 0.7rem;
		padding: 0.85rem;
	}

	.ds-footer[dir="rtl"] .ds-footer__prompt {
		padding: 0.85rem;
	}

	.ds-footer__prompt-mark {
		display: none;
	}

	.ds-footer__prompt-input {
		padding: 0.35rem 0.15rem;
	}

	.ds-footer__prompt-send {
		justify-content: center;
		width: 100%;
	}

	.ds-footer__prompt-send:hover {
		transform: none;
	}

	.ds-footer__meta {
		gap: 0.35rem 1.1rem;
	}

	.ds-footer__col {
		gap: 0;
	}

	.ds-footer__col--legal {
		gap: 0.35rem;
		padding-top: 0.7rem;
	}

	.ds-footer__note {
		text-transform: none;
	}
}

@media (max-width: 400px) {
	.ds-footer__meta {
		grid-template-columns: 1fr;
	}

	.ds-footer__col--legal {
		order: 8;
	}
}

@media (max-height: 700px) and (min-width: 901px) {
	.ds-footer {
		height: auto;
		min-height: 100dvh;
		overflow: visible;
	}

	.ds-footer__headline {
		font-size: clamp(2.2rem, 5vw, 4rem);
	}
}

@media (pointer: coarse) {
	.ds-footer__prompt-send,
	.ds-footer__link {
		min-height: 2.75rem;
	}
}

@keyframes ds-footer-marquee {
	to {
		transform: translateX(-50%);
	}
}

@keyframes ds-footer-pulse {
	0% {
		opacity: 0.8;
		transform: scale(1);
	}
	80%,
	100% {
		opacity: 0;
		transform: scale(4);
	}
}

@media (prefers-reduced-motion: reduce) {
	.ds-footer__marquee-track,
	.ds-footer__pulse::after {
		animation: none;
	}

	.ds-footer__prompt-send,
	.ds-footer__link,
	.ds-footer__prompt {
		transition: none;
	}
}