/* ==========================================================================
   03 PROOF
   ========================================================================== */

.chapter-proof {
	z-index: 300;
	background: var(--color-bg);
}

.proof {
	background: none;
	color: #101820;

	height: 100%;
	overflow-y: auto;
	overflow-x: hidden;
}

.proof-stage {
	position: relative;
	top: auto;

	height: auto;
	min-height: 100svh;

	overflow: visible;

	background-color: var(--color-bg);
}

.proof-container {
	grid-column: 2;
	grid-row: 1;

	width: 100%;
	max-width: 1180px;

	margin: 0 auto;
}

.proof-header {
	position: relative;
	margin: 0 0 100px;
	overflow: hidden;
}

.proof-title {
	margin: 0 0 70px;
	font-family: var(--font-condensed);
	font-size: clamp(4rem, 8vw, 7.5rem);
	font-weight: 600;
	line-height: 0.9;
	letter-spacing: -0.03em;
}

.proof-title span {
	color: var(--color-accent);
}

/* PROOF QUOTE */

.proof-quote {
	max-width: 860px;
	font-family: var(--font-serif);
	margin: 0 auto;
	font-size: clamp(2.4rem, 5vw, 5rem);
	line-height: 1.05;
	font-weight: 600;
	font-style: italic;
	text-align: center;
	letter-spacing: -0.04em;
}

.proof-quote-line {
	position: relative;
	display: block;
	width: fit-content;
	margin-inline: auto;
	z-index: 1;
}

.proof-quote-line::before {
	content: "";
	position: absolute;
	z-index: -1;

	height: 0.38em;
	bottom: 0.08em;

	background: var(--color-disrupt);
}

.proof-quote-line--one::before {
	left: -1.5em;
	right: -2.8em;

	transform: rotate(-0.35deg);
}

.proof-quote-line--two::before {
	left: -0.8em;
	right: -1.3em;
}

.proof-credit {
	margin-top: 20px;
	font-family: var(--font-condensed);
	text-align: right;
	font-size: 0.75rem;
	font-weight: 400;
	text-transform: uppercase;
}

.proof-credit span {
	color: var(--color-accent);
}

.proof-intro {
	margin-bottom: 70px;
	font-family: var(--font-primary);
	font-size: 0.95rem;
	font-weight: 700;
	letter-spacing: 0.04em;
}

.proof-rule {
	display: block;
	width: 60px;
	height: 3px;
	margin-top: 18px;
	background: var(--color-accent);
}


/* LESSONS */

.proof-lesson {
	display: grid;
	grid-template-columns: minmax(280px, 0.8fr) minmax(420px, 1.2fr);
	gap: 0 90px;
	position: relative;
	padding: 40px 0;
	border-bottom: 1px solid var(--color-accent);
}

.proof-copy {
	align-self: center;
	width: 100%;
	max-width: 430px;
}

.proof-number {
	margin: 0 0 25px;
	font-family: var(--font-condensed);
	color: var(--color-accent);
	font-size: 3.25em;
	font-weight: 400;
}

.proof-copy h3 {
	margin: 0 0 32px;
	font-family: var(--font-primary);
	font-size: clamp(2.4rem, 4vw, 3.25rem);
	line-height: 0.92;
	letter-spacing: -0.05em;
}

.proof-copy h3 span {
	color: var(--color-accent);
}

.proof-copy h4 {
	margin: 0 0 18px;
	font-family: var(--font-primary);
	font-size: 1.15rem;
}

.proof-copy > p {
	/*max-width: 430px;*/
	font-family: var(--font-primary);
	margin: 0 0 30px 0;
	font-size: 0.875em;
	line-height: 1.25em;
}

.proof-description {
	margin: 0;

	font-family: var(--font-primary);
	font-size: 0.875em;
	line-height: 1.25em;
}

.proof-visual {
	position: relative;
	align-self: center;

	width: min(100%, 27.25rem);
	aspect-ratio: 1 / 1;

	margin-inline: auto;
}

.proof-image {
	position: absolute;
	inset: 0;

	display: block;

	width: 100%;
	height: 100%;

	object-fit: contain;
	object-position: center;
}

.proof-object {
	position: absolute;
	z-index: 2;
	pointer-events: none;
}

.proof-object-sticky {
	width: 80%;
    left: 32%;
    bottom: -16%;
}

.proof-object-marker {
	width: 100%;
    left: -31%;
    bottom: 40%;
}

.proof-object-paper {
	width: 100%;
    left: 50%;
    bottom: 59%;
}

.proof-object-coffee {
	width: 100%;
    left: 40%;
    bottom: 45%;
    opacity: 90%;
    mix-blend-mode: multiply;
}

.proof-tags {
	grid-column: 1 / -1;
	grid-row: 2;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.5em 0.75em;
	margin: 32px 0 12px;
	padding: 0;
	font-family: var(--font-condensed);
	text-transform: uppercase;
	list-style: none;
}

.proof-tags li {
	display: flex;
	align-items: center;
	font-size: 0.75em;
	font-weight: 400;
	letter-spacing: 0.03em;
	gap: 0.75em;
}

.proof-tags li:not(:last-child)::after {
	content: "/";
	color: var(--color-accent);
	font-size: 1.25em;
    font-weight: 900;
}

/* CASE STUDY LINK */

.proof-case-study-link {
	grid-column: 1 / -1;
	grid-row: 3;

	justify-self: end;
	align-self: center;

	display: inline-flex;
	align-items: center;
	gap: 0.25em;

	color: var(--color-disrupt);

	font-family: var(--font-condensed);
	font-size: 1rem;
	font-weight: 400;
	letter-spacing: 0.03em;
	text-transform: uppercase;
	text-decoration: none;
}

.proof-case-study-icon {
	display: block;

	width: 24px;
	height: 24px;

	transition: transform 180ms ease;
}

.proof-case-study-link:hover .proof-case-study-icon,
.proof-case-study-link:focus-visible .proof-case-study-icon {
	transform: translate(3px, 0);
}

.proof-case-study-link:focus-visible {
	outline: 2px solid var(--color-disrupt);
	outline-offset: 6px;
}

/* ----------------------- */

.slang-term {
	color: inherit;
	cursor: help;
	text-decoration-line: underline;
	text-decoration-style: dotted;
	text-decoration-thickness: 1px;
	text-underline-offset: 0.18em;
}

.slang-term--slaps {
	text-decoration-color: var(--color-disrupt);
	text-decoration-thickness: 2px;
}

.slang-toast {
	position: fixed;
	z-index: 1000;

	padding: 0.65em 0.85em;

	background: var(--color-text);
	color: var(--color-bg);

	font-family: var(--font-primary);
	font-size: 0.75rem;
	line-height: 1.3;

	border-radius: 0.4em;

	opacity: 0;
	pointer-events: none;

	transform: translateY(4px);

	transition:
		opacity 140ms ease,
		transform 140ms ease;
}

.slang-toast.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* ==========================================================================
   PROOF — CLOSING
   ========================================================================== */

.proof-closing {
	padding-top: 10em;
}

.proof-closing-intro {
	border-left: 6px solid var(--color-accent);
	/*margin-bottom: 10em;*/
	padding-left: 24px;
	max-width: 800px;
}

.proof-closing-intro p {
	margin: 0;

	font-family: var(--font-condensed);
	font-size: 24px;
	letter-spacing: -0.02em;
}

.proof-closing-intro strong {
	font-weight: 700;
}


/* FULL WIDTH STATEMENT */

.proof-closing-statement {
	position: relative;
	width: 100%;
	height: clamp(900px, 75cqw, 1400px);

	container-type: inline-size;

	overflow: hidden;
}


/* Shared layers */

.proof-layer {
	position: absolute;

	left: 0;
	width: 100%;

	will-change: transform;
}

.proof-layer img {
	display: block;

	width: 100%;
	height: auto;
}


/* Individual positioning */

.proof-layer--design {
	top: 0;
}

.proof-layer--is-the {
	top: 22cqw;
}

.proof-layer--output {
	top: 44cqw;
}


/* Legacy statement */

.proof-layer--legacy {
	top: 39%;
    left: 8%;
    width: auto;
    z-index: 10;
    padding-left: 56px;
    border-left: 12px solid var(--color-accent);
}

.proof-layer--legacy h2 {
	margin: 0;

	font-family: var(--font-primary);
	font-size: clamp(3rem, 6vw, 6rem);
	font-weight: 700;
	line-height: 0.95;
	letter-spacing: -0.04em;

	color: var(--color-text);
}

.proof-layer--design,
.proof-layer--is-the,
.proof-layer--output {
	mix-blend-mode: multiply;
}

/* RESPONSIVE */

@media (max-width: 900px) {

	.proof {
		padding: 90px 0 110px;
	}

	.proof-container {
		width: min(100% - 40px, 720px);
		padding: 0 52px 0 36px;
	}

	.proof-header {
		margin-bottom: 70px;
	}

	.proof-title {
		margin-bottom: 50px;
	}

	.proof-lesson {
		grid-template-columns: 1fr;
		gap: 0 42px;
		/*/padding-bottom: 70px;/*/
	}

	.proof-copy {
		max-width: 100%;
	}

	.proof-intro {
		margin-bottom: 36px;
	}

	.proof-visual {
		width: min(100%, 24rem);
	}

	.proof-object-sticky {
		width: 77%;
        left: 41%;
        bottom: -10%;
	}

	.proof-object-marker {
		width: 100%;
        left: -52%;
        bottom: -15%;
	}

	.proof-object-paper {
		width: 100%;
        left: 78%;
        bottom: 14%;
	}

	.proof-object-coffee {
    	width: 100%;
        left: 57%;
        bottom: 122%;
	}

	.proof-closing-statement {
    height: 700px;
	}

	.proof-closing-intro {
		margin-bottom: 0;
	}

	.proof-tags {
		grid-column: 1;
		grid-row: auto;

		padding-right: 0;
	}

	.proof-case-study-link {
		grid-column: 1;
        grid-row: 4;
        justify-self: end;
        margin-top: 18px;
	}
}


@media (max-width: 600px) {

	.proof {
		padding: 70px 0 90px;
	}

	.proof-container {
		width: calc(100% - 32px);
		padding: 0;
	}

	.proof-title {
		font-size: 3.5rem;
		margin-bottom: 44px;
	}

	.proof-quote {
		font-size: 2rem;
	}
	.proof-quote-line {
		width: auto;
	}

	.proof-quote-line--one::before {
		left: -0.35em;
		right: -0.5em;
	}

	.proof-quote-line--two::before {
		left: -0.15em;
		right: -0.35em;
	}

	.proof-credit {
    	font-size: 0.65rem;
	}

	.proof-intro {
    	font-size: 0.87rem;
		margin-bottom: 0;
	}

	.proof-lesson {
		gap: 0 32px;
	}

	.proof-copy h3 {
		font-size: 42px;
	}

	.proof-visual {
		width: min(100%, 21rem);
	}

	.proof-object-sticky {
		width: 89%;
        left: 30%;
		bottom: 7%;
	}

	.proof-object-paper {
		display: none;
	}

	.proof-object-marker {
		width: 100%;
        left: 39%;
        top: 15%;
	}

	.proof-object-coffee {
    	width: 100%;
    	left: 60%;
    	bottom: 23%;
	}

	.proof-tags {
		font-size: 14px;
		line-height: 1.2;
	}

	.proof-closing {
		padding: 7em 0 5em;
	}

	.proof-closing-intro p {
		font-size: 1.25rem;
	}

	.proof-closing-statement {
        height: 500px;
    }

	.proof-closing-statement h2 {
		font-size: 8vw;
	}

	.proof-layer--legacy {
	top: 21%;
    padding-left: 40px;
    border-left: 6px solid var(--color-accent);
	}

}