/* ========================================================================== AI Engineer Labs — single stylesheet No build step, no dependencies. Light + dark via prefers-color-scheme, overridable by a persisted [data-theme] on . ========================================================================== */ /* --- Tokens --------------------------------------------------------------- */ :root { --bg: #fbfbf9; --bg-elevated: #ffffff; --bg-sunken: #f2f2ee; --text: #16181d; --text-muted: #5b6070; --border: #e2e2dc; --border-strong: #cfcfc7; --accent: #2563eb; --accent-contrast: #ffffff; --accent-soft: rgba(37, 99, 235, 0.08); --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem; --space-5: 1.5rem; --space-6: 2rem; --space-7: 3rem; --space-8: 5rem; --radius: 10px; --maxw: 68rem; --font-sans: ui-sans-serif, -apple-system, "Segoe UI", Inter, Roboto, system-ui, sans-serif; --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace; } @media (prefers-color-scheme: dark) { :root { --bg: #0d0e11; --bg-elevated: #14161a; --bg-sunken: #101216; --text: #e8e9eb; --text-muted: #9aa1af; --border: #24272e; --border-strong: #343841; --accent: #7dd3fc; --accent-contrast: #0d0e11; --accent-soft: rgba(125, 211, 252, 0.10); } } /* Manual toggle must win in both directions. */ :root[data-theme="light"] { --bg: #fbfbf9; --bg-elevated: #ffffff; --bg-sunken: #f2f2ee; --text: #16181d; --text-muted: #5b6070; --border: #e2e2dc; --border-strong: #cfcfc7; --accent: #2563eb; --accent-contrast: #ffffff; --accent-soft: rgba(37, 99, 235, 0.08); } :root[data-theme="dark"] { --bg: #0d0e11; --bg-elevated: #14161a; --bg-sunken: #101216; --text: #e8e9eb; --text-muted: #9aa1af; --border: #24272e; --border-strong: #343841; --accent: #7dd3fc; --accent-contrast: #0d0e11; --accent-soft: rgba(125, 211, 252, 0.10); } /* --- Reset / base ------------------------------------------------------- */ *, *::before, *::after { box-sizing: border-box; } html { scroll-behavior: smooth; /* Keep anchor targets clear of the sticky header. */ scroll-padding-top: 5rem; -webkit-text-size-adjust: 100%; } body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font-sans); font-size: 1rem; line-height: 1.65; -webkit-font-smoothing: antialiased; } h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -0.02em; font-weight: 650; text-wrap: balance; } p { margin: 0; text-wrap: pretty; } ul { margin: 0; padding: 0; list-style: none; } a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; } img { max-width: 100%; height: auto; display: block; } :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; } @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } } /* --- Primitives --------------------------------------------------------- */ .container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--space-5); } .section { padding-block: var(--space-8); border-top: 1px solid var(--border); } .section--flush { border-top: 0; } .section__head { max-width: 46rem; margin-bottom: var(--space-6); } .section__head h2 { font-size: clamp(1.5rem, 3.4vw, 2rem); margin-bottom: var(--space-3); } .section__head p { color: var(--text-muted); font-size: 1.05rem; } .eyebrow { display: block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); margin-bottom: var(--space-3); } .grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); } .card { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--space-5); } .card h3 { font-size: 1.05rem; margin-bottom: var(--space-2); } .card p { color: var(--text-muted); font-size: 0.94rem; } a.card { text-decoration: none; color: inherit; transition: border-color 0.15s ease, transform 0.15s ease; } a.card:hover { border-color: var(--border-strong); transform: translateY(-2px); } a.card .card__more { color: var(--accent); font-size: 0.88rem; font-weight: 550; } .btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); padding: 0.7rem 1.25rem; border: 1px solid var(--border-strong); border-radius: var(--radius); background: transparent; color: var(--text); font: inherit; font-weight: 550; font-size: 0.95rem; text-decoration: none; cursor: pointer; transition: background 0.15s ease, border-color 0.15s ease; } .btn:hover { background: var(--bg-sunken); border-color: var(--text-muted); } .btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); } .btn--primary:hover { background: var(--accent); border-color: var(--accent); opacity: 0.88; } .btn--lg { padding: 0.9rem 1.75rem; font-size: 1.02rem; } /* Checklist used by "What you'll build" */ .checklist { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); } .checklist li { position: relative; padding-left: 1.75rem; line-height: 1.5; } .checklist li::before { content: ""; position: absolute; left: 0; top: 0.45em; width: 0.95rem; height: 0.5rem; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); } /* --- Header ------------------------------------------------------------- */ .site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: saturate(140%) blur(10px); border-bottom: 1px solid var(--border); } .site-header__inner { display: flex; align-items: center; gap: var(--space-4); min-height: 4rem; } .wordmark { display: inline-flex; align-items: baseline; gap: 0.4rem; font-weight: 650; font-size: 1rem; letter-spacing: -0.02em; color: var(--text); text-decoration: none; white-space: nowrap; } .wordmark__dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--accent); flex: none; transform: translateY(-1px); } /* The actions markup sits before the nav in the DOM (so the menu button is reachable early on mobile); order puts it back on the right on desktop. */ .site-nav { margin-left: auto; order: 1; display: flex; align-items: center; gap: var(--space-5); } .site-nav a { color: var(--text-muted); text-decoration: none; font-size: 0.94rem; font-weight: 500; } .site-nav a:hover { color: var(--text); } .site-nav .btn { padding: 0.45rem 1rem; font-size: 0.9rem; } .site-nav .btn--primary { color: var(--accent-contrast); } .header-actions { display: flex; align-items: center; gap: var(--space-2); order: 2; } .icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 2.25rem; height: 2.25rem; padding: 0; border: 1px solid var(--border); border-radius: var(--radius); background: transparent; color: var(--text-muted); cursor: pointer; flex: none; } .icon-btn:hover { color: var(--text); border-color: var(--border-strong); } .icon-btn svg { width: 1.05rem; height: 1.05rem; } /* Show the moon in light mode, the sun in dark mode. */ .icon-sun { display: none; } :root[data-theme="dark"] .icon-sun { display: block; } :root[data-theme="dark"] .icon-moon { display: none; } .nav-toggle { display: none; } @media (max-width: 46rem) { .nav-toggle { display: inline-flex; } .header-actions { margin-left: auto; } .site-nav { position: absolute; top: 100%; left: 0; right: 0; margin: 0; flex-direction: column; align-items: stretch; gap: var(--space-1); padding: var(--space-4) var(--space-5) var(--space-5); background: var(--bg-elevated); border-bottom: 1px solid var(--border); box-shadow: 0 12px 24px -12px rgba(0, 0, 0, 0.35); display: none; } .site-nav.is-open { display: flex; } .site-nav a:not(.btn) { padding-block: var(--space-2); font-size: 1rem; } .site-nav .btn { margin-top: var(--space-2); padding: 0.6rem 1rem; } } /* --- Hero --------------------------------------------------------------- */ .hero { padding-block: clamp(var(--space-7), 9vw, 6.5rem) var(--space-8); } .hero__inner { max-width: 44rem; } .hero h1 { font-size: clamp(2.1rem, 6vw, 3.4rem); margin-bottom: var(--space-5); } .hero__sub { font-size: clamp(1.05rem, 2.2vw, 1.2rem); color: var(--text-muted); margin-bottom: var(--space-6); } .hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-6); } .factstrip { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.02em; color: var(--text-muted); padding-top: var(--space-5); border-top: 1px solid var(--border); } .factstrip li { display: flex; align-items: center; gap: var(--space-3); } .factstrip li:not(:last-child)::after { content: "·"; color: var(--border-strong); } /* --- Prereq note -------------------------------------------------------- */ .note { margin-top: var(--space-5); padding: var(--space-4) var(--space-5); background: var(--accent-soft); border-left: 2px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0; font-size: 0.95rem; color: var(--text); } /* --- Cohort details ----------------------------------------------------- */ .details { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); margin: 0; } .details > div { min-width: 0; } .details dt { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: var(--space-2); } .details dd { margin: 0; font-size: 1.05rem; font-weight: 550; } .details dd small { display: block; font-size: 0.85rem; font-weight: 400; color: var(--text-muted); } .card--highlight { background: var(--bg-sunken); border-color: var(--border-strong); padding: var(--space-6); } /* --- Instructor --------------------------------------------------------- */ .instructor { display: grid; gap: var(--space-6); align-items: start; } @media (min-width: 48rem) { .instructor { grid-template-columns: 13rem 1fr; } } .avatar { position: relative; width: 9rem; aspect-ratio: 1; border-radius: var(--radius); overflow: hidden; background: var(--accent-soft); border: 1px solid var(--border); display: grid; place-items: center; } @media (min-width: 48rem) { .avatar { width: 100%; } } /* Initials sit underneath; the photo covers them when it loads. */ .avatar__initials { font-family: var(--font-mono); font-size: 2.25rem; font-weight: 600; letter-spacing: 0.05em; color: var(--accent); } .avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; /* Portrait source, square frame — bias the crop upward to keep the face centred. */ object-position: 50% 22%; } /* A broken/missing src collapses so the initials show through. */ .avatar img:not([src]), .avatar img[src=""] { display: none; } .instructor__name { font-size: 1.5rem; margin-bottom: var(--space-2); } .instructor__title { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.04em; color: var(--text-muted); margin-bottom: var(--space-5); } .instructor__bio > p + p { margin-top: var(--space-4); } .instructor__bio p { color: var(--text-muted); } .credentials { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); margin-block: var(--space-6); padding-block: var(--space-5); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); } .credentials dt { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 600; color: var(--text); letter-spacing: -0.02em; } .credentials dd { margin: var(--space-1) 0 0; font-size: 0.85rem; color: var(--text-muted); line-height: 1.4; } .companies { font-size: 0.9rem; color: var(--text-muted); } /* Logo strip. Monogram SVGs inherit the theme colour via currentColor; real logo files dropped in as get toned to match by the rules below. */ .logos { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); } .logo { display: flex; align-items: center; justify-content: center; height: 3rem; /* Uniform chips keep the row tidy despite wildly different logo aspect ratios, and all six still fit on one line at desktop width. */ min-width: 6.5rem; padding-inline: var(--space-3); border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-elevated); color: var(--text-muted); transition: color 0.15s ease, border-color 0.15s ease; } .logo:hover { color: var(--text); border-color: var(--border-strong); } .logo svg { height: 1.5rem; width: 4rem; fill: currentColor; } .logo svg text { font-family: var(--font-mono); font-size: 15px; font-weight: 600; letter-spacing: 0.04em; } /* Real logo files. These six marks are inconsistent by nature — some are dark-on-transparent, others bake in their own light background — so no single filter works for all of them. Each one sits on a light chip instead, which renders every logo the way its owner intended in both themes. Grayscale keeps six brand palettes from fighting the page; true colour returns on hover. */ .logo--img { background: #f4f4f2; border-color: rgba(0, 0, 0, 0.08); padding-inline: var(--space-4); } .logo img { height: var(--h, 1.5rem); width: auto; max-width: 6.5rem; object-fit: contain; filter: grayscale(1); opacity: 0.85; transition: opacity 0.15s ease, filter 0.15s ease; } .logo--img:hover img { filter: grayscale(0); opacity: 1; } .companies strong { display: block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 500; margin-bottom: var(--space-2); } .instructor__links { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-5); font-size: 0.94rem; } /* --- Apply band --------------------------------------------------------- */ .apply { text-align: center; padding-block: var(--space-8); border-top: 1px solid var(--border); background: var(--bg-sunken); } .apply h2 { font-size: clamp(1.6rem, 4vw, 2.25rem); margin-bottom: var(--space-4); } .apply p { max-width: 34rem; margin: 0 auto var(--space-6); color: var(--text-muted); } .apply__fine { font-size: 0.85rem; margin-top: var(--space-5); margin-bottom: 0; } /* --- Footer ------------------------------------------------------------- */ .site-footer { border-top: 1px solid var(--border); padding-block: var(--space-6); font-size: 0.88rem; color: var(--text-muted); } .site-footer__inner { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-5); align-items: center; justify-content: space-between; } .site-footer nav { display: flex; flex-wrap: wrap; gap: var(--space-4); } /* --- Curriculum page ---------------------------------------------------- */ .page-head { padding-block: var(--space-7) var(--space-6); } .page-head h1 { font-size: clamp(1.9rem, 5vw, 2.75rem); margin-bottom: var(--space-4); max-width: 40rem; } .page-head p { max-width: 42rem; color: var(--text-muted); font-size: 1.05rem; } .module-nav { position: sticky; top: 4rem; z-index: 40; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: saturate(140%) blur(10px); border-block: 1px solid var(--border); } .module-nav ul { display: flex; gap: var(--space-5); overflow-x: auto; padding-block: var(--space-3); scrollbar-width: thin; -webkit-overflow-scrolling: touch; } .module-nav a { white-space: nowrap; font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.04em; color: var(--text-muted); text-decoration: none; } .module-nav a:hover { color: var(--accent); } .module { padding-block: var(--space-7); border-top: 1px solid var(--border); } .module:first-of-type { border-top: 0; } .module__head { max-width: 44rem; margin-bottom: var(--space-6); } .module__head h2 { font-size: clamp(1.4rem, 3.2vw, 1.85rem); margin-bottom: var(--space-3); } .module__head p { color: var(--text-muted); } .sessions { display: grid; gap: var(--space-4); } @media (min-width: 60rem) { .sessions { grid-template-columns: repeat(2, 1fr); } } .session { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--space-5); display: flex; flex-direction: column; } .session__no { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: var(--space-2); } .session h3 { font-size: 1.1rem; margin-bottom: var(--space-3); } .session__lede { font-size: 0.94rem; color: var(--text-muted); margin-bottom: var(--space-4); } .topics { display: flex; flex-wrap: wrap; gap: var(--space-2); } .topics li { font-size: 0.82rem; line-height: 1.4; padding: 0.25rem 0.6rem; background: var(--bg-sunken); border: 1px solid var(--border); border-radius: 999px; color: var(--text-muted); } .project { margin-top: auto; padding-top: var(--space-4); } .project__box { margin-top: var(--space-4); padding: var(--space-4); border: 1px dashed var(--border-strong); border-radius: var(--radius); background: var(--accent-soft); font-size: 0.92rem; } .project__box strong { display: block; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); font-weight: 500; margin-bottom: var(--space-2); }