/*
 * hero.css — section 01, the homepage hero.
 * Contents: 1 shell · 2 photograph and shade · 3 layout · 4 heading ·
 * 5 lead · 6 the animated line · 7 button row · 8 narrow screens.
 *
 * Loaded by inc/assets.php as "synergi-section-hero", only on pages that
 * declare the hero through syn_use_sections(). Markup: sections/hero.php.
 * Behaviour: assets/js/sections/hero.js.
 *
 * main.min.css styles this section across SEVEN passes and the later ones
 * reverse the earlier ones outright — the first pass builds a gradient
 * background with a CSS grid overlay and a huge ringed circle, and a later pass
 * sets `.hero::before,.hero::after{display:none}` and replaces the gradient with
 * a flat colour behind a photograph. None of that first pass renders. What is
 * here is only what survives the cascade, resolved once.
 *
 * Two other rules in the source are dead and are not carried across: an
 * `@media (max-height:40rem) and (orientation:landscape)` block that a later
 * unconditional rule overrides, and a `body.page-id-10479` rule tied to the
 * previous developer's draft page.
 *
 * Class map, design source -> theme:
 *   .hero        -> .syn-hero            .hero-media  -> .syn-hero__media
 *   .hero-shade  -> .syn-hero__shade     .hero-layout -> .syn-hero__layout
 *   .hero-copy   -> .syn-hero__copy      .hero-lead   -> .syn-hero__lead
 *   .hero-motion-line   -> .syn-hero__motion
 *   .hero-motion-visual -> .syn-hero__motion-visual
 *   .hero-motion-slot   -> .syn-hero__motion-slot
 *   .hero-typeword      -> .syn-hero__typeword
 *   .hero-caret         -> .syn-hero__caret
 *   .button-row         -> .syn-button-row   (shared, defined in base.css)
 *
 * The design paints the shade and the copy in ink and white at many opacities.
 * All of them are derived with color-mix() from palette tokens rather than
 * written as rgba() literals (CLAUDE.md §2.7).
 *
 * One deviation from the design source, 1 Sep, asked for and approved: the
 * shade is no longer painted in Ink but in --syn-scrim, a near-neutral charcoal
 * defined in base.css §1. Ink is a strongly blue navy, and at the 86-97% these
 * gradients run it washed the photograph blue instead of letting it read as a
 * photograph. The stop percentages below are untouched, so the shade is exactly
 * as dark as the design made it — only its hue moved. parts/page-header.css §3
 * carries the identical change; the two must stay in step.
 */

.syn-hero {
	/* One source for the highlight blue used by the animated line. The design
	   hard-codes #76d0f1, which is not in the §3 palette; mixing cyan toward
	   white reproduces it to within a shade and keeps the value tokenised. */
	--syn-hero-highlight: color-mix(in srgb, var(--syn-cyan) 62%, var(--syn-white));
	--syn-hero-scrim-90: color-mix(in srgb, var(--syn-scrim) 90%, transparent);
	--syn-hero-copy: color-mix(in srgb, var(--syn-white) 78%, transparent);
}

/* ==========================================================================
   1. Shell
   ========================================================================== */

.syn-hero {
	position: relative;
	display: block;
	block-size: min(49rem, 92svh);
	min-block-size: 41rem;
	overflow: hidden;
	background-color: var(--syn-scrim);
	color: var(--syn-white);
}

/* ==========================================================================
   2. Photograph and shade
   Two stacked gradients: one across the inline axis so the copy always has a
   dark bed to sit on, one down the block axis so the section joins the one
   below it instead of ending on a hard edge.
   ========================================================================== */

.syn-hero__media,
.syn-hero__shade {
	position: absolute;
	inset: 0;
	inline-size: 100%;
	block-size: 100%;
}

.syn-hero__media {
	object-fit: cover;
	object-position: 52% 52%;
}

.syn-hero__shade {
	z-index: 1;
	background-image:
		linear-gradient(
			90deg,
			color-mix(in srgb, var(--syn-scrim) 97%, transparent) 0%,
			color-mix(in srgb, var(--syn-scrim) 86%, transparent) 38%,
			color-mix(in srgb, var(--syn-scrim) 42%, transparent) 68%,
			color-mix(in srgb, var(--syn-scrim) 20%, transparent) 100%
		),
		linear-gradient(
			180deg,
			color-mix(in srgb, var(--syn-scrim) 10%, transparent) 34%,
			var(--syn-hero-scrim-90) 100%
		);
}

/* ==========================================================================
   3. Layout
   The block-start padding clears the fixed site header, which is transparent
   over this section — the hero is the one place on the site that has no
   parts/page-header.php band reserving that space.
   ========================================================================== */

.syn-hero__layout {
	position: relative;
	z-index: 2;
	display: grid;
	block-size: 100%;
	min-block-size: inherit;
	grid-template-columns: minmax(0, 1fr);
	grid-template-rows: 1fr;
	gap: 2.5rem 4rem;
	align-items: center;
	padding-block-start: calc(var(--syn-header-height) + 3.5rem);
	padding-block-end: 3.5rem;
}

.syn-hero__copy {
	inline-size: min(100%, 61rem);
	align-self: center;
}

/* ==========================================================================
   4. Heading
   The one <h1> on the homepage. Sized in rem rather than from the type scale
   because the design tunes it per breakpoint well past step 4.
   ========================================================================== */

.syn-hero__title {
	max-inline-size: none;
	margin-block-end: 1.4rem;
	color: var(--syn-white);
	font-size: 4.15rem;
	font-weight: 700;
	line-height: 1;
	letter-spacing: 0;
	text-wrap: balance;
}

.syn-hero__title span {
	display: block;
	color: var(--syn-cyan);
}

/* ==========================================================================
   5. Lead
   ========================================================================== */

.syn-hero__lead {
	max-inline-size: none;
	margin-block-end: 0;
	color: var(--syn-hero-copy);
	font-size: 1.05rem;
	line-height: 1.62;
}

/* ==========================================================================
   6. The animated line
   A typewriter cycling four words. The slot is a fixed 21ch so the line does
   not reflow on every keystroke and shove the buttons around.
   ========================================================================== */

.syn-hero__motion {
	max-inline-size: 43rem;
	min-block-size: 1.65rem;
	margin-block: 1rem 0;
	color: color-mix(in srgb, var(--syn-white) 82%, transparent);
	font-size: 0.92rem;
	font-weight: 600;
	line-height: 1.5;
}

.syn-hero__motion-visual {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	column-gap: 0.38em;
}

.syn-hero__motion-visual > span:first-child {
	color: var(--syn-hero-copy);
}

.syn-hero__motion-slot {
	display: inline-flex;
	inline-size: 21ch;
	align-items: baseline;
	color: var(--syn-hero-highlight);
}

.syn-hero__typeword {
	display: inline;
	min-inline-size: 0;
	color: var(--syn-hero-highlight);
	white-space: nowrap;
}

.syn-hero__caret {
	display: inline-block;
	inline-size: 0.08em;
	block-size: 0.85em;
	margin-inline-start: 0.08em;
	background-color: var(--syn-cyan);
	transform: translateY(0.08em);
	animation: syn-hero-caret-blink 920ms steps(1) infinite;
}

@keyframes syn-hero-caret-blink {

	0%,
	49% {
		opacity: 1;
	}

	50%,
	100% {
		opacity: 0;
	}
}

/*
 * Reduced motion stops the blink outright. base.css already collapses the
 * duration globally, but an infinite steps() animation still flickers at 0.01ms
 * — it has to be switched off, not shortened. The typewriter itself never
 * starts: hero.js checks the same preference before its first tick, so the line
 * stays on the word the server rendered.
 */
@media (prefers-reduced-motion: reduce) {

	.syn-hero__caret {
		animation: none;
	}
}

/* ==========================================================================
   7. Button row
   Shared with the closing CTA; the buttons themselves live in base.css.
   ========================================================================== */

.syn-button-row {
	display: flex;
	flex-wrap: wrap;
	gap: 0.85rem;
	margin-block-start: 2rem;
}

/* ==========================================================================
   8. Narrow screens
   ========================================================================== */

@media (max-width: 74rem) {

	.syn-hero__layout {
		gap: 2rem 2.5rem;
	}

	.syn-hero__title {
		font-size: 3.9rem;
	}

	.syn-hero__lead {
		max-inline-size: 43rem;
	}

	/* The editor's typed line break (hero.php). Only wide screens honour it —
	   the design source hides .hero-lead-break at this same width, because in
	   a narrower column a forced break leaves a ragged short line. */
	.syn-hero__lead-break {
		display: none;
	}
}

@media (max-width: 61.25rem) {

	.syn-hero {
		block-size: min(46rem, 92svh);
		min-block-size: 39rem;
	}

	.syn-hero__layout {
		grid-template-columns: 1fr;
		grid-template-rows: 1fr;
		gap: 1.5rem;
		align-content: stretch;
		padding-block-start: calc(var(--syn-header-height) + 2.5rem);
		padding-block-end: 2.5rem;
	}

	.syn-hero__title {
		max-inline-size: 17ch;
		font-size: 3.45rem;
	}
}

@media (max-width: 47.99rem) {

	.syn-hero {
		min-block-size: min(43rem, 94svh);
	}

	.syn-hero__media {
		object-position: 61% 50%;
	}

	/* Darker and reaching further across: at this width the copy sits over the
	   middle of the photograph rather than clear of the subject. */
	.syn-hero__shade {
		background-image:
			linear-gradient(
				90deg,
				color-mix(in srgb, var(--syn-scrim) 96%, transparent) 0%,
				color-mix(in srgb, var(--syn-scrim) 80%, transparent) 64%,
				color-mix(in srgb, var(--syn-scrim) 50%, transparent) 100%
			),
			linear-gradient(
				180deg,
				color-mix(in srgb, var(--syn-scrim) 20%, transparent) 18%,
				color-mix(in srgb, var(--syn-scrim) 92%, transparent) 100%
			);
	}

	.syn-hero__layout {
		min-block-size: min(43rem, 94svh);
		inline-size: min(calc(100% - (2 * var(--syn-gutter))), var(--syn-container));
		gap: 1.75rem;
		padding-block-start: calc(var(--syn-header-height) + 2rem);
		padding-block-end: 2rem;
	}

	.syn-hero__copy {
		max-inline-size: 100%;
		align-self: center;
	}

	.syn-hero__title {
		max-inline-size: 100%;
		margin-block-end: 1rem;
		font-size: clamp(2.35rem, 11.4vw, 3.05rem);
	}

	.syn-hero__lead {
		max-inline-size: 34rem;
		font-size: 0.88rem;
		line-height: 1.55;
	}

	.syn-hero__motion {
		max-inline-size: 34rem;
		/* Two lines' worth: the sentence wraps here, and without the reserved
		   height the buttons jump when it does. */
		min-block-size: 2.625rem;
		margin-block-start: 0.8rem;
		font-size: 0.82rem;
	}

	.syn-hero__motion-visual,
	.syn-hero__motion-slot {
		max-inline-size: 100%;
	}

	.syn-button-row {
		display: grid;
		inline-size: 100%;
		grid-template-columns: 1fr 1fr;
		gap: 0.5rem;
		margin-block-start: 1.25rem;
	}

	.syn-button-row .syn-button {
		inline-size: 100%;
		min-block-size: 3.1rem;
		gap: 0.4rem;
		padding-inline: 0.6rem;
		font-size: 0.69rem;
	}
}

@media (max-width: 32rem) {

	.syn-button-row {
		grid-template-columns: 1fr;
	}

	.syn-button-row .syn-button {
		min-block-size: 3rem;
	}
}

@media (max-width: 27rem) {

	.syn-hero__title {
		font-size: clamp(2.05rem, 10.8vw, 2.55rem);
	}

	/* The slot drops onto its own line rather than squeezing 21ch beside the
	   lead-in, which would hyphenate "unnecessary overhead" mid-word. */
	.syn-hero__motion-visual {
		display: block;
	}

	.syn-hero__motion-slot {
		display: flex;
		inline-size: 100%;
		margin-block-start: 0.12rem;
	}
}