/*
 * base.css — reset, typography, layout primitives, grid, brass-sheen text.
 */

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

html {
	/* Ensure consistent text-size adjustment across browsers */
	-webkit-text-size-adjust: 100%; /* Safari, Chrome, iOS */
	-moz-text-size-adjust: 100%;    /* Firefox */
	-ms-text-size-adjust: 100%;     /* IE/Edge */
	text-size-adjust: 100%;        /* Unprefixed standard */
	scroll-behavior: smooth;
}

body {
	margin: 0;
	background: var(--sk-bg);
	color: var(--sk-text);
	font-family: var(--sk-font-sans);
	font-size: var(--sk-step-0);
	line-height: var(--sk-leading-body);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
	overflow-x: hidden;
}

img, svg, video, iframe { max-width: 100%; height: auto; display: block; }
img { font-style: italic; } /* show alt text gracefully while loading */

a { color: var(--sk-brass-mid); text-decoration: none; transition: color var(--sk-dur-fast) var(--sk-ease); }
a:hover { color: var(--sk-brass-high); }

h1, h2, h3, h4 {
	font-family: var(--sk-font-serif);
	font-weight: 600;
	line-height: var(--sk-leading-tight);
	letter-spacing: -0.01em;
	margin: 0 0 0.6em;
}

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 1.1em; padding-left: 1.2em; }

strong { color: var(--sk-text); font-weight: 600; }

::selection { background: var(--sk-brass-mid); color: var(--sk-text-on-brass); }

:focus-visible {
	outline: 2px solid var(--sk-brass-mid);
	outline-offset: 3px;
	border-radius: 4px;
}

/* --- Accessibility helpers ------------------------------------------------- */
.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	padding: 0; margin: -1px;
	overflow: hidden; clip: rect(0,0,0,0);
	white-space: nowrap; border: 0;
}

/* --- Layout primitives ----------------------------------------------------- */
.sk-container {
	width: 100%;
	max-width: var(--sk-maxw);
	margin-inline: auto;
	padding-inline: var(--sk-gutter);
}
.sk-container--narrow { max-width: var(--sk-maxw-narrow); }

.sk-main { display: block; }

.sk-section {
	padding-block: var(--sk-section);
	position: relative;
}

.sk-section__head { margin-bottom: var(--sk-space-5); max-width: 60ch; }
.sk-section__head--center { margin-inline: auto; text-align: center; }

.sk-eyebrow {
	font-family: var(--sk-font-sans);
	text-transform: uppercase;
	letter-spacing: 0.22em;
	font-size: var(--sk-step--1);
	color: var(--sk-brass-mid);
	margin-bottom: 0.9em;
}

.sk-muted { color: var(--sk-muted); }

.sk-h3 { font-size: var(--sk-step-1); margin-bottom: var(--sk-space-3); }

/* --- Grid ------------------------------------------------------------------ */
.sk-grid { display: grid; gap: clamp(1rem, 2.5vw, 1.75rem); }
.sk-grid--cards { grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.sk-grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.sk-grid--certs { grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); }

/* --- Brass sheen text ------------------------------------------------------ */
/* Progressive enhancement: solid brass fallback first, gradient clip on top.  */
.sk-sheen-text {
	color: var(--sk-brass-mid);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
	.sk-sheen-text {
		background: var(--sk-sheen);
		-webkit-background-clip: text;
		background-clip: text;
		-webkit-text-fill-color: transparent;
		color: transparent;
	}
}

/* --- Prose (page/post content) -------------------------------------------- */
.sk-prose { font-size: var(--sk-step-0); }
.sk-prose h2 { font-size: var(--sk-step-2); margin-top: 1.6em; }
.sk-prose h3 { font-size: var(--sk-step-1); margin-top: 1.4em; }
.sk-prose img { border-radius: var(--sk-radius); margin-block: 1.5em; }
.sk-prose a { text-decoration: underline; text-underline-offset: 3px; }
.sk-prose__figure { margin: 0 0 2rem; }
.sk-prose__figure img { border-radius: var(--sk-radius); box-shadow: var(--sk-shadow-soft); }

/* --- iOS / mobile viewport + safe areas ----------------------------------- */
@supports (height: 100svh) {
	.sk-hero { min-height: 100svh; }
}
.sk-header { padding-top: env(safe-area-inset-top, 0); }
.sk-footer__legal { padding-bottom: env(safe-area-inset-bottom, 0); }