160 lines
10 KiB
CSS
160 lines
10 KiB
CSS
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/* ─────────────────────────────────────────────────────────────────────────
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* design-systems/superhuman/tokens.css
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*
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* Structured token bindings for "Design System Inspired by Superhuman".
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* Premium keyboard-first email client. Predominantly white canvas with a
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* single dramatic gesture of color (deep purple hero), warm cream CTAs,
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* lavender as the sole accent, and charcoal ink (warmer than #000) for text.
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*
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* Brand identity in three sentences:
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* 1. Maximum confidence through minimum decoration — white dominates,
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* borders define containers, shadows are whispered. Lavender Glow
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* (#cbb7fb) is the only accent that ever leaves the warm-neutral
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* grayscale.
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* 2. Super Sans VF with non-standard weight stops (460 / 540 / 600 / 700).
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* Body weight is 460 — slightly heavier than regular but lighter than
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* medium — the typographic signature that feels confident, never bold.
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* 3. Two-radius binary system (8px / 16px) and ultra-tight 0.96 leading
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* on display sizes — headlines compress into architectural blocks
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* while body text breathes at 1.50 leading.
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*
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* Schema decisions:
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* - --bg: #ffffff (Pure White) — the dominant content canvas.
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* - --surface: #ffffff — cards inherit the canvas; --border defines them.
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* - --surface-warm: #e9e5dd (Warm Cream) — lifted warm tier for CTAs.
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* - --fg: #292827 (Charcoal Ink) — warm near-black, never pure black.
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* - --fg-2 → var(--fg) — DESIGN.md uses one ink color on light surfaces.
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* - --muted: #6f6c69 — warm mid-gray for captions, derived to sit
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* between Charcoal Ink and Parchment Border on the warm hue family.
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* - --border: #dcd7d3 (Parchment Border) — warm light gray, slight pink.
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* - --accent: #cbb7fb (Lavender Glow); --accent-on: #292827 — charcoal
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* on lavender (DESIGN.md "Don't use bright/saturated CTA text").
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* - --leading-tight: 0.96 — the signature display compression.
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* - --tracking-display: -0.0275em ≈ -1.32px / 48px (DESIGN.md §3).
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* - --radius-md: 8px (no mid-tier — DESIGN.md mandates only 8 / 16).
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* - --elev-raised: charcoal-tinted whisper, never gray; matches the
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* warm-neutral palette used everywhere else.
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* ─────────────────────────────────────────────────────────────────── */
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:root {
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/* ─── Surface ─────────────────────────────────────────────────────
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* White canvas dominates. Warm Cream (#e9e5dd) lives in --surface-warm
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* as the lifted warm tier — reserved for CTAs, never used as a card bg. */
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--bg: #ffffff; /* Pure White — primary page background */
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--surface: #ffffff; /* Cards inherit the canvas; --border contains them */
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--surface-warm: #e9e5dd; /* Warm Cream — primary button background only */
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/* ─── Foreground ──────────────────────────────────────────────────
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* Charcoal Ink — warm near-black with faint brown undertone. Body
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* text uses one ink color throughout; --muted is reserved for true
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* subtext like captions and helper labels. */
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--fg: #292827; /* Charcoal Ink — primary text */
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--fg-2: var(--fg); /* alias — DESIGN.md uses one ink for body */
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--muted: #6f6c69; /* Warm mid-gray — captions, helper text */
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--meta: var(--muted); /* alias — same warm gray for metadata */
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/* ─── Border ──────────────────────────────────────────────────────
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* Parchment Border — warm light gray with slight pink undertone.
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* Cards rely on borders for containment, not box shadows. */
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--border: #dcd7d3; /* Parchment Border — card edges, dividers */
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--border-soft: var(--border); /* alias — no separate inner-row tier */
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/* ─── Accent ──────────────────────────────────────────────────────
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* Lavender Glow — soft, approachable purple. The ONLY chromatic
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* departure from the warm-neutral palette. Charcoal sits on it for
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* AA contrast (lavender is too light for white text). */
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--accent: #cbb7fb;
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--accent-on: #292827; /* Charcoal on lavender — DESIGN.md §4 */
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--accent-hover: color-mix(in oklab, var(--accent), black 6%);
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--accent-active: color-mix(in oklab, var(--accent), black 12%);
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/* ─── Semantic ────────────────────────────────────────────────────
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* Superhuman's marketing exercises extreme color restraint, but the
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* schema requires semantic tokens for product-side usage (status pills,
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* inline validation). Defaults from _schema/defaults.css; legible on white. */
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--success: #16a34a;
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--warn: #eab308;
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--danger: #dc2626;
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/* ─── Typography ──────────────────────────────────────────────────
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* Super Sans VF — custom variable font with non-standard weight axis
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* (460, 540, 600, 700). Body weight is 460 — the signature stop that
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* sits between Regular and Medium. Fallback chain mirrors DESIGN.md §3. */
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--font-display: "Super Sans VF", system-ui, -apple-system, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
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--font-body: "Super Sans VF", system-ui, -apple-system, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
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--font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
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/* Type scale — DESIGN.md §3 hierarchy. 64px hero / 48px section /
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* 28px feature title / 22px card heading / 20px body heading.
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* All eight stops appear verbatim in DESIGN.md — no interpolation. */
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--text-xs: 12px; /* Micro Label */
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--text-sm: 14px; /* Caption family */
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--text-base: 16px; /* Body / Button / Nav */
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--text-lg: 20px; /* Body Heading */
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--text-xl: 22px; /* Card Heading */
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--text-2xl: 28px; /* Feature Title */
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--text-3xl: 48px; /* Section Heading */
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--text-4xl: 64px; /* Display Hero */
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/* Leading + tracking.
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* 0.96 — the signature display compression (DESIGN.md §3).
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* 1.50 — body text breathes generously by contrast.
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* -0.0275em ≈ -1.32px / 48px from DESIGN.md §3, applied at display sizes only. */
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--leading-body: 1.5;
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--leading-tight: 0.96;
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--tracking-display: -0.0275em;
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/* ─── Spacing ─────────────────────────────────────────────────────
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* 8px base. Scale per DESIGN.md §5: 4 / 8 / 12 / 16 / 20 / 24 / 32 / 48. */
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--space-1: 4px;
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--space-2: 8px;
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--space-3: 12px;
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--space-4: 16px;
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--space-5: 20px;
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--space-6: 24px;
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--space-8: 32px;
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--space-12: 48px;
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/* Section rhythm — DESIGN.md §5 says 48–80px between major sections.
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* Top of the range on desktop, compresses on smaller breakpoints. */
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--section-y-desktop: 80px;
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--section-y-tablet: 56px;
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--section-y-phone: 40px;
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/* ─── Radius ──────────────────────────────────────────────────────
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* Binary system — DESIGN.md §5: only 8px and 16px exist on the
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* marketing site. No micro-rounding (2px), no pill buttons (50px+).
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* --radius-md collapses to --radius-sm because the brand has no
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* mid-tier; --radius-pill is reserved for status dots only. */
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--radius-sm: 8px; /* Buttons, inputs, inline elements */
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--radius-md: 8px; /* No mid-tier — DESIGN.md mandates only 8/16 */
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--radius-lg: 16px; /* Cards, links, larger containers */
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--radius-pill: 9999px; /* Status dots only — never buttons */
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/* ─── Elevation ───────────────────────────────────────────────────
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* Depth lives in borders and color contrast, not shadow. The raised
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* tier is a charcoal-tinted whisper for product-screenshot frames
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* (DESIGN.md §6 "Subtle shadow … product screenshot containers"). */
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--elev-flat: none;
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--elev-ring: 0 0 0 1px var(--border);
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--elev-raised: 0 2px 12px rgba(41, 40, 39, 0.06);
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/* ─── Focus ring ──────────────────────────────────────────────────
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* Lavender Glow at 45% — Superhuman is keyboard-first, so the focus
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* indicator must read clearly without violating the muted palette. */
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--focus-ring: 0 0 0 3px color-mix(in oklab, var(--accent), transparent 55%);
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/* ─── Motion ──────────────────────────────────────────────────────
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* Restrained — Superhuman's velocity is in the keyboard, not the page.
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* Defaults from _schema/defaults.css. */
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--motion-fast: 150ms;
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--motion-base: 200ms;
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--ease-standard: cubic-bezier(0.2, 0, 0, 1);
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/* ─── Layout ──────────────────────────────────────────────────────
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* 1200px container — DESIGN.md §5 "~1200px content container, centered". */
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--container-max: 1200px;
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--container-gutter-desktop: 24px;
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--container-gutter-tablet: 16px;
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--container-gutter-phone: 12px;
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}
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