/* ============================================================ C.I.Tronics website - theme tokens. The token architecture is carried over from the Guardian webui: every color, shadow, and font this stylesheet reads lives as a semantic custom property, so a theme is just a block that redefines tokens. Rule bodies carry no hex literals. :root holds the default LIGHT theme. site.js sets to one of light | dark | contrast (resolving an "auto" choice against prefers-color-scheme), and the [data-theme="dark"] / [data-theme="contrast"] blocks below override only the tokens that change. These three are the site's three visual styles. ============================================================ */ :root { /* Surfaces */ --bg-page: #e8ebf0; /* body */ --bg-surface: #ffffff; /* cards */ --bg-header: #1f2937; /* blue-slate header / footer band */ /* Text */ --text-primary: #1e2632; --text-secondary: #5a6573; --text-on-dark: #ffffff; /* copy on the dark header / footer band */ /* Borders */ --border-default: #dce1e9; --border-overlay: rgba(0, 0, 0, 0.2); /* Header / footer controls (sit on the always-dark band; constant across themes) */ --header-ctrl-bg: rgba(255, 255, 255, 0.12); --header-ctrl-bg-hover: rgba(255, 255, 255, 0.22); --header-ctrl-border: rgba(255, 255, 255, 0.30); /* Accents */ --accent: #2563eb; /* primary brand blue (links + focus + brand mark) */ --success: #198754; --warning: #ffc107; --danger: #dc3545; /* Spacing scale (4px base), radii, shadows */ --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-5: 20px; --space-6: 24px; --space-8: 32px; --radius-sm: 3px; --radius: 4px; --radius-lg: 8px; --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.06); /* Fonts */ --font-body: "Roboto", system-ui, sans-serif; --font-mono: "Roboto Mono", ui-monospace, monospace; } /* DARK theme - low-glare, blue-tinted slate. */ :root[data-theme="dark"] { --bg-page: #0f1722; --bg-surface: #18212e; --bg-header: #0b121b; --text-primary: #e7ebf1; --text-secondary: #9aa6b6; --border-default: #2a3747; --border-overlay: rgba(255, 255, 255, 0.18); --accent: #4d8dff; /* lifted for contrast on dark */ --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.5); } /* HIGH-CONTRAST theme - maximum luminance, hard black edges. */ :root[data-theme="contrast"] { --bg-page: #ffffff; --bg-surface: #ffffff; --bg-header: #000000; --text-primary: #000000; --text-secondary: #161616; --border-default: #000000; --border-overlay: rgba(0, 0, 0, 0.65); --header-ctrl-bg: rgba(255, 255, 255, 0.18); --header-ctrl-bg-hover: rgba(255, 255, 255, 0.30); --header-ctrl-border: rgba(255, 255, 255, 0.60); --accent: #0b3ea8; --success: #0a7d3c; --warning: #8a5a00; --danger: #b00018; --shadow-card: none; } :root[data-theme="contrast"] a { text-decoration: underline; } /* ============================================================ Base ============================================================ */ *, *::before, *::after { box-sizing: border-box; } [hidden] { display: none !important; } html { height: 100%; } body { font-family: var(--font-body); color: var(--text-primary); background-color: var(--bg-page); margin: 0; line-height: 1.5; /* Sticky footer: header / main / footer stacked, main grows. */ min-height: 100%; display: flex; flex-direction: column; } a { color: var(--accent); } /* The brand wordmark and the "C.i." mark are SVG silhouettes pulled in via CSS mask, so a single asset recolors to any theme token (the band is always dark, so the header / footer marks resolve to white). */ .brand-logo { display: block; background-color: currentColor; -webkit-mask: url(../img/logo-citronics.svg) no-repeat center / contain; mask: url(../img/logo-citronics.svg) no-repeat center / contain; aspect-ratio: 13457 / 2115; /* native wordmark viewBox ratio */ } /* ============================================================ Header / footer - the dark brand band. Markup is injected by site.js on every page. The header is a 3-zone grid (brand left, optional page-subtitle centered, controls right) mirroring the Guardian layout; the band stays dark across all three themes, so its copy and marks are always light. ============================================================ */ header { background-color: var(--bg-header); color: var(--text-on-dark); padding: var(--space-3) var(--space-5); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: var(--space-4); } .header-brand { grid-column: 1; justify-self: start; display: inline-flex; align-items: center; color: var(--text-on-dark); } .header-brand .brand-logo { height: 26px; } .page-subtitle { grid-column: 2; justify-self: center; font-size: 1.1em; opacity: 0.7; white-space: nowrap; } .header-right { grid-column: 3; justify-self: end; display: flex; align-items: center; gap: var(--space-3); } /* Language switch: two equal links, the active one filled. Sits on the dark band, so its colors come from the constant --header-ctrl-* tokens. */ .lang-switch { display: inline-flex; border: 1px solid var(--header-ctrl-border); border-radius: var(--radius); overflow: hidden; font-size: 0.85em; } .lang-switch a { padding: 3px 10px; color: var(--text-on-dark); text-decoration: none; line-height: 1.4; } .lang-switch a + a { border-left: 1px solid var(--header-ctrl-border); } .lang-switch a:hover { background: var(--header-ctrl-bg-hover); } .lang-switch a.is-active { background: var(--header-ctrl-bg); font-weight: 700; cursor: default; } /* Theme toggle: cycles Auto / Light / Dark / High Contrast, persisted in localStorage by site.js. */ .theme-toggle { background: var(--header-ctrl-bg); color: var(--text-on-dark); border: 1px solid var(--header-ctrl-border); border-radius: var(--radius); padding: 3px 10px; font-family: var(--font-body); font-size: 0.85em; line-height: 1.4; cursor: pointer; } .theme-toggle:hover { background: var(--header-ctrl-bg-hover); } footer { background-color: var(--bg-header); color: var(--text-on-dark); padding: var(--space-4) var(--space-5); margin-top: auto; /* pin to bottom on short pages */ } .footer-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap; } .footer-inner .brand-logo { height: 18px; opacity: 0.85; } .footer-copy { font-size: 0.85em; opacity: 0.7; } /* ============================================================ Main content ============================================================ */ .container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 var(--space-5); flex: 1 0 auto; /* grow so the footer sits at the bottom */ } /* Under-construction hero: large brand mark, headline, one line of copy, vertically centered in the available space. */ .hero { display: flex; flex-direction: column; align-items: center; text-align: center; gap: var(--space-4); padding: clamp(var(--space-8), 12vh, 120px) var(--space-4); } .hero-mark { width: clamp(120px, 22vw, 200px); aspect-ratio: 1 / 1; background-color: var(--accent); -webkit-mask: url(../img/favicon.svg) no-repeat center / contain; mask: url(../img/favicon.svg) no-repeat center / contain; } .hero-title { margin: 0; font-size: clamp(1.8em, 5vw, 2.8em); font-weight: 700; color: var(--text-primary); } .hero-text { margin: 0; max-width: 38ch; font-size: 1.1em; color: var(--text-secondary); } /* ============================================================ Responsive ============================================================ */ @media (max-width: 560px) { header { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-3); } .header-brand { flex: 1 0 auto; } .page-subtitle { display: none; } .header-right { width: 100%; justify-content: flex-end; } }