/* ============================================================ Gaussathon — styles Base :root is the gold palette: deep ink ground, parchment text, gold + periwinkle. The shipped default is `light`, an override block further down. ============================================================ */ :root { /* Triplets, so both the stylesheet and the canvases in main.js can derive every tint from one place. Swap these and the whole page follows. */ --bg-rgb: 8, 9, 12; --text-rgb: 233, 229, 220; --accent-rgb: 214, 162, 74; --blue-rgb: 138, 169, 230; --violet-rgb: 169, 138, 230; --bg: rgb(var(--bg-rgb)); --bg-alt: #0c0e13; --bg-elev: #111420; --line: rgba(var(--text-rgb), 0.10); --line-soft: rgba(var(--text-rgb), 0.055); --text: rgb(var(--text-rgb)); --text-dim: #a8a498; --text-faint: #6e6b63; --gold: rgb(var(--accent-rgb)); --gold-soft: #e5c07b; --blue: rgb(var(--blue-rgb)); --violet: rgb(var(--violet-rgb)); --title-a: #fbf7ee; --title-b: #cfc9bb; --title-c: #8d8880; /* Foreground for anything sitting ON the accent (primary button, skip link). Must invert with the palette or it goes accent-on-accent. */ --on-accent: #0a0a0c; --selection-fg: #fff; /* Multipliers on canvas opacity, read by main.js. A hue difference carries at low alpha; a pure-luminance one does not, so the neutral palettes need more. */ --contour-gain: 1; --curve-gain: 1; --curve-fill-gain: 1; --serif: "Newsreader", "Iowan Old Style", Georgia, "Times New Roman", serif; --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace; --wrap: 1160px; --ease: cubic-bezier(0.22, 0.61, 0.36, 1); } /* ── monochrome palette ───────────────────────────────── Set data-palette="mono" on (or CONFIG.palette in main.js, or append ?palette=mono to the URL) to strip all hue out. */ :root[data-palette="mono"] { --bg-rgb: 0, 0, 0; /* Body text sits a step below pure white so the (now white) accents still read as accents — in gold that separation came free from the hue. */ --text-rgb: 228, 228, 228; --accent-rgb: 255, 255, 255; --blue-rgb: 176, 176, 176; --violet-rgb: 134, 134, 134; --bg-alt: #070707; --bg-elev: #131313; --text-dim: #a0a0a0; --text-faint: #737373; --gold-soft: #d8d8d8; --title-a: #ffffff; --title-b: #c8c8c8; --title-c: #7c7c7c; --contour-gain: 2.2; } /* ── inverted / light palette ─────────────────────────── data-palette="light" — black on white. Same structure, opposite ends. */ :root[data-palette="light"] { --bg-rgb: 255, 255, 255; --text-rgb: 17, 17, 17; --accent-rgb: 0, 0, 0; --blue-rgb: 122, 122, 122; --violet-rgb: 158, 158, 158; --bg-alt: #f6f6f6; --bg-elev: #ededed; --text-dim: #4f4f4f; /* #6f6f6f keeps small labels at ~5:1 even on the --bg-alt panels; a lighter grey passes on pure white but fails against #f6f6f6. */ --text-faint: #6f6f6f; --gold-soft: #333333; --on-accent: #ffffff; --selection-fg: #000; --title-a: #0a0a0a; --title-b: #2e2e2e; --title-c: #6f6f6f; --contour-gain: 1.5; --curve-gain: 2.1; --curve-fill-gain: 0.4; } /* Light needs more ink: hairline weights that read crisp as white-on-black look anaemic as black-on-white, because the halation that thickens light type on a dark ground works against dark type on a light one. */ :root[data-palette="light"] body { font-weight: 400; } :root[data-palette="light"] .gint, :root[data-palette="light"] .gint__rad text { font-weight: 400; } :root[data-palette="light"] .gint__rad path { stroke-width: 3.15; } :root[data-palette="light"] .gint__sign { font-weight: 300; } :root[data-palette="light"] .btn, :root[data-palette="light"] .eyebrow, :root[data-palette="light"] .hero__stamp, :root[data-palette="light"] .nav__brand, :root[data-palette="light"] .nav__links a, :root[data-palette="light"] .sechead__num, :root[data-palette="light"] .tier__n, :root[data-palette="light"] .tier__note, :root[data-palette="light"] .prob__tag, :root[data-palette="light"] .timeline__when, :root[data-palette="light"] .fact dt, :root[data-palette="light"] .countdown dt, :root[data-palette="light"] .cta__fine, :root[data-palette="light"] .link, :root[data-palette="light"] .foot__brand, :root[data-palette="light"] .foot__meta { font-weight: 500; } /* Target the path: the inline stroke-width presentation attribute lives there, and an inherited value would lose to it. */ :root[data-palette="light"] .nav__mark path { stroke-width: 1.8; } *, *::before, *::after { box-sizing: border-box; } html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; } @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } } body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--serif); font-size: 18px; line-height: 1.62; font-weight: 300; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden; } h1, h2, h3, h4 { font-weight: 400; line-height: 1.14; margin: 0; letter-spacing: -0.015em; } p { margin: 0 0 1em; } em { font-style: italic; } a { color: inherit; text-decoration: none; } ::selection { background: rgba(var(--accent-rgb), 0.28); color: var(--selection-fg); } .skip { position: absolute; left: -9999px; top: 0; z-index: 100; background: var(--gold); color: var(--on-accent); padding: 0.6rem 1rem; font-family: var(--mono); font-size: 0.8rem; } .skip:focus { left: 0; } :focus-visible { outline: 1.5px solid var(--gold); outline-offset: 3px; } .wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(1.25rem, 5vw, 3rem); } .wrap--narrow { max-width: 780px; } .sep { opacity: 0.35; margin-inline: 0.5em; } /* ── buttons ───────────────────────────────────────────── */ .btn { display: inline-flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 0.78rem; font-weight: 400; letter-spacing: 0.09em; text-transform: uppercase; padding: 0.85rem 1.5rem; border: 1px solid var(--line); border-radius: 2px; color: var(--text); background: transparent; transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease); white-space: nowrap; } .btn:hover { transform: translateY(-1px); border-color: rgba(var(--text-rgb),0.28); background: rgba(var(--text-rgb),0.04); } .btn--primary { background: var(--gold); border-color: var(--gold); color: var(--on-accent); font-weight: 500; } .btn--primary:hover { background: var(--gold-soft); border-color: var(--gold-soft); color: var(--on-accent); } .btn--ghost { color: var(--text-dim); } .btn--ghost:hover { color: var(--text); } .btn--sm { padding: 0.55rem 1rem; font-size: 0.7rem; } .btn--lg { padding: 1rem 2rem; font-size: 0.82rem; } .link { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.05em; color: var(--gold); border-bottom: 1px solid rgba(var(--accent-rgb),0.3); padding-bottom: 2px; transition: border-color 0.25s var(--ease); } .link:hover { border-color: var(--gold); } /* ── nav ───────────────────────────────────────────────── */ .nav { position: fixed; inset: 0 0 auto 0; z-index: 50; transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s; border-bottom: 1px solid transparent; } .nav.is-stuck { background: rgba(var(--bg-rgb), 0.82); backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%); border-bottom-color: var(--line-soft); } .nav__inner { max-width: var(--wrap); margin-inline: auto; padding: 0.9rem clamp(1.25rem, 5vw, 3rem); display: flex; align-items: center; gap: 2rem; } .nav__brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.04em; } .nav__mark { width: 28px; height: 18px; color: var(--gold); flex: none; } .nav__links { display: flex; gap: 1.75rem; margin-left: auto; } .nav__links a { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.06em; color: var(--text-faint); transition: color 0.2s var(--ease); } .nav__links a:hover { color: var(--text); } @media (max-width: 860px) { .nav__links { display: none; } .nav .btn { margin-left: auto; } } /* ── hero ──────────────────────────────────────────────── */ .hero { position: relative; isolation: isolate; min-height: 100svh; display: flex; align-items: center; padding: 8rem 0 5rem; border-bottom: 1px solid var(--line-soft); } .hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; display: block; } .hero__veil { position: absolute; inset: 0; z-index: -1; pointer-events: none; background: radial-gradient(120% 90% at 50% 105%, rgba(var(--bg-rgb),0) 30%, rgba(var(--bg-rgb),0.85) 78%, var(--bg) 100%), linear-gradient(180deg, rgba(var(--bg-rgb),0.72) 0%, rgba(var(--bg-rgb),0.25) 32%, rgba(var(--bg-rgb),0.55) 100%); } .hero__inner { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(1.25rem, 5vw, 3rem); } .eyebrow { display: inline-flex; align-items: center; gap: 0.55rem; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 2rem; } .eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 0 rgba(var(--accent-rgb),0.6); animation: pulse 2.8s infinite; } @keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb),0.5); } 70% { box-shadow: 0 0 0 9px rgba(var(--accent-rgb),0); } 100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb),0); } } .hero__title { font-size: clamp(3.4rem, 13vw, 9.5rem); line-height: 0.92; letter-spacing: -0.045em; font-weight: 300; margin-bottom: 1.4rem; background: linear-gradient(175deg, var(--title-a) 8%, var(--title-b) 62%, var(--title-c) 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; } .hero__formula { margin-bottom: 2.4rem; } /* The Gaussian integral, hand-set in the page's own serif so it sits with the wordmark instead of importing a separate math face. */ .gint { display: inline-flex; align-items: center; font-family: var(--serif); font-weight: 300; font-size: clamp(1.1rem, 2.6vw, 1.75rem); line-height: 1; letter-spacing: 0; color: var(--gold); opacity: 0.92; font-variant-ligatures: none; } .gint i { font-style: italic; } .gint sup { font-size: 0.62em; line-height: 0; vertical-align: 0.72em; } .gint sup sup { font-size: 0.68em; vertical-align: 0.55em; } .gint__rel { margin-inline: 0.44em; opacity: 0.7; } /* integral sign with its limits stacked at the extremities */ .gint__op { display: inline-flex; align-items: stretch; height: 1.85em; margin-right: 0.12em; } .gint__sign { display: flex; align-items: center; font-size: 2.35em; line-height: 0.78; font-style: italic; font-weight: 200; transform: translateY(-0.02em); } .gint__lim { display: flex; flex-direction: column; justify-content: space-between; font-size: 0.44em; line-height: 1; padding: 0.25em 0 0.15em; margin-left: -0.15em; opacity: 0.78; } .gint__up { align-self: flex-start; } .gint__lo { align-self: flex-start; margin-left: -0.42em; } .gint__body { margin-right: 0.06em; } .gint__diff { margin-left: 0.3em; } .gint__diff i { margin-left: 0.04em; } /* radical — one SVG path for surd + vinculum, radicand set as SVG text so the bar lands exactly on the apex at every size */ .gint__rad { height: 1.24em; flex: none; overflow: visible; position: relative; top: 0.04em; margin-left: 0.02em; } .gint__rad path { stroke-width: 2.85; } .gint__rad text { font-family: var(--serif); font-weight: 300; font-style: normal; } @media (max-width: 520px) { .gint { font-size: 1.05rem; } } .hero__lede { max-width: 58ch; font-size: clamp(1.05rem, 1.9vw, 1.32rem); color: var(--text-dim); line-height: 1.62; margin-bottom: 1.6rem; } .hero__lede em { color: var(--text); font-style: italic; } .hero__stamp { display: inline-block; font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.13em; text-transform: uppercase; color: var(--text); border: 1px solid var(--line); border-left: 2px solid var(--gold); padding: 0.7rem 1.1rem; margin-bottom: 2.6rem; background: rgba(var(--text-rgb),0.02); } .hero__actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-bottom: 3.5rem; } .countdown { display: flex; gap: clamp(1.5rem, 4vw, 3rem); margin: 0; } .countdown div { display: flex; flex-direction: column; gap: 0.35rem; } .countdown dt { order: 2; font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-faint); } .countdown dd { order: 1; margin: 0; font-size: clamp(1.6rem, 4vw, 2.4rem); line-height: 1; font-variant-numeric: tabular-nums; color: var(--text); } .hero__scroll { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); width: 1px; height: 46px; background: linear-gradient(var(--line), transparent); overflow: hidden; } .hero__scroll span { display: block; width: 100%; height: 40%; background: var(--gold); animation: trickle 2.6s var(--ease) infinite; } @keyframes trickle { 0% { transform: translateY(-100%); } 100% { transform: translateY(250%); } } @media (max-width: 700px) { .hero__scroll { display: none; } } /* ── sections ──────────────────────────────────────────── */ .section { padding: clamp(5rem, 11vw, 9rem) 0; position: relative; } .section--alt { background: var(--bg-alt); border-block: 1px solid var(--line-soft); } .sechead { margin-bottom: clamp(3rem, 6vw, 4.5rem); max-width: 62ch; } .sechead__num { display: block; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.2em; color: var(--gold); margin-bottom: 1rem; } .sechead h2 { font-size: clamp(2rem, 5vw, 3.4rem); letter-spacing: -0.03em; margin-bottom: 1rem; } .sechead__sub { color: var(--text-dim); font-size: clamp(1rem, 1.6vw, 1.15rem); margin: 0; } /* ── charter ───────────────────────────────────────────── */ .charter { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: clamp(2.5rem, 6vw, 5rem); } @media (max-width: 900px) { .charter { grid-template-columns: 1fr; } } .charter__lead { position: sticky; top: 6rem; align-self: start; } .charter__lead p { color: var(--text-dim); font-size: 1.08rem; } .charter__lead p:first-child { color: var(--text); font-size: clamp(1.15rem, 2.2vw, 1.45rem); line-height: 1.5; } .charter__lead em { color: var(--gold-soft); } @media (max-width: 900px) { .charter__lead { position: static; } } .charter__list { list-style: none; counter-reset: c; margin: 0; padding: 0; } .charter__list li { counter-increment: c; padding: 1.9rem 0 1.9rem 4rem; border-top: 1px solid var(--line-soft); position: relative; } .charter__list li:last-child { border-bottom: 1px solid var(--line-soft); } .charter__list li::before { content: counter(c, decimal-leading-zero); position: absolute; left: 0; top: 2rem; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--text-faint); } .charter__list h3 { font-size: 1.35rem; margin-bottom: 0.55rem; } .charter__list p { color: var(--text-dim); font-size: 1rem; margin: 0; } /* ── judging tiers ─────────────────────────────────────── */ .tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); } @media (max-width: 940px) { .tiers { grid-template-columns: 1fr; } } .tier { background: var(--bg-alt); padding: clamp(1.8rem, 3vw, 2.6rem); display: flex; flex-direction: column; transition: background 0.35s var(--ease); } .tier:hover { background: var(--bg-elev); } .tier header { display: flex; align-items: baseline; gap: 0.9rem; margin-bottom: 1.4rem; } .tier__n { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; color: var(--gold); } .tier h3 { font-size: clamp(1.5rem, 2.6vw, 1.95rem); } .tier__def { color: var(--text); font-size: 1.02rem; margin-bottom: 1.5rem; } .tier__pts { list-style: none; margin: 0 0 1.75rem; padding: 0; display: grid; gap: 0.8rem; } .tier__pts li { position: relative; padding-left: 1.4rem; color: var(--text-dim); font-size: 0.95rem; line-height: 1.55; } .tier__pts li::before { content: "—"; position: absolute; left: 0; color: var(--text-faint); } .tier__note { margin: auto 0 0; padding-top: 1.25rem; border-top: 1px solid var(--line-soft); font-family: var(--mono); font-size: 0.74rem; line-height: 1.6; letter-spacing: 0.02em; color: var(--text-faint); } .tiers__foot { margin: 2rem 0 0; color: var(--text-faint); font-size: 0.95rem; max-width: 70ch; } /* ── problems ──────────────────────────────────────────── */ .probs { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; } .prob { border: 1px solid var(--line-soft); border-radius: 3px; padding: 1.9rem 1.7rem; background: linear-gradient(180deg, rgba(var(--text-rgb),0.022), transparent); transition: border-color 0.3s var(--ease), transform 0.3s var(--ease); } .prob:hover { border-color: var(--line); transform: translateY(-3px); } .prob__tag { display: inline-block; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold); margin-bottom: 1.1rem; } .prob h3 { font-size: 1.28rem; margin-bottom: 0.7rem; } .prob p { color: var(--text-dim); font-size: 0.97rem; margin: 0; } .probs__note { margin: 2rem 0 0; max-width: 72ch; color: var(--text-faint); font-size: 0.95rem; } .probs__note a { color: var(--text-dim); border-bottom: 1px solid var(--line); transition: color 0.2s var(--ease), border-color 0.2s var(--ease); } .probs__note a:hover { color: var(--text); border-bottom-color: var(--text-faint); } .callout { margin-top: 3rem; padding: clamp(1.8rem, 3vw, 2.5rem); border: 1px solid var(--line-soft); border-left: 2px solid var(--gold); background: var(--bg-alt); border-radius: 3px; max-width: 760px; } .callout h4 { font-size: 1.25rem; margin-bottom: 0.7rem; } .callout p { color: var(--text-dim); font-size: 1rem; } /* ── timeline ──────────────────────────────────────────── */ .timeline { list-style: none; margin: 0 0 3.5rem; padding: 0; } .timeline li { display: grid; grid-template-columns: 190px 1fr; gap: 2rem; padding: 1.7rem 0; border-top: 1px solid var(--line-soft); position: relative; } .timeline li:last-child { border-bottom: 1px solid var(--line-soft); } .timeline__when { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.09em; color: var(--gold); padding-top: 0.35rem; } .timeline h3 { font-size: 1.22rem; margin-bottom: 0.4rem; } .timeline p { color: var(--text-dim); font-size: 0.98rem; margin: 0; } @media (max-width: 700px) { .timeline li { grid-template-columns: 1fr; gap: 0.6rem; } } .facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); } .fact { background: var(--bg-alt); padding: 1.4rem 1.5rem; } .fact dt { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 0.5rem; } .fact dd { margin: 0; font-size: 1.05rem; color: var(--text); } /* ── faq ───────────────────────────────────────────────── */ .faq { border-top: 1px solid var(--line-soft); } .faq details { border-bottom: 1px solid var(--line-soft); } .faq summary { list-style: none; cursor: pointer; padding: 1.4rem 2.5rem 1.4rem 0; font-size: 1.15rem; position: relative; transition: color 0.2s var(--ease); } .faq summary::-webkit-details-marker { display: none; } .faq summary:hover { color: var(--gold-soft); } .faq summary::after { content: ""; position: absolute; right: 0.4rem; top: 50%; width: 11px; height: 11px; margin-top: -6px; border-right: 1px solid var(--text-faint); border-bottom: 1px solid var(--text-faint); transform: rotate(45deg); transition: transform 0.3s var(--ease); } .faq details[open] summary::after { transform: rotate(-135deg); } .faq details p { color: var(--text-dim); font-size: 1rem; max-width: 68ch; padding-bottom: 1.6rem; margin: 0; animation: fadein 0.35s var(--ease); } @keyframes fadein { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } } /* ── cta ───────────────────────────────────────────────── */ .cta { position: relative; isolation: isolate; overflow: hidden; padding: clamp(5rem, 12vw, 9rem) 0; border-top: 1px solid var(--line-soft); text-align: center; } .cta__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; opacity: 0.5; } .cta__inner { position: relative; } .cta h2 { font-size: clamp(2rem, 5.2vw, 3.6rem); letter-spacing: -0.03em; margin-bottom: 1.2rem; } .cta p { color: var(--text-dim); font-size: 1.1rem; max-width: 54ch; margin-inline: auto; margin-bottom: 2.4rem; } .cta__actions { display: flex; flex-wrap: wrap; gap: 0.85rem; justify-content: center; margin-bottom: 2.2rem; } .cta__fine { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.13em; text-transform: uppercase; color: var(--text-faint); margin: 0; } /* ── footer ────────────────────────────────────────────── */ .foot { border-top: 1px solid var(--line-soft); padding: 3rem 0; background: var(--bg); } .foot__inner { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 2rem; } .foot__brand { font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.04em; margin: 0; color: var(--text); } .foot__line { margin: 0; font-size: 0.92rem; color: var(--text-faint); font-style: italic; } .foot__meta { margin: 0 0 0 auto; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--text-faint); } .foot__meta a { border-bottom: 1px solid transparent; transition: border-color 0.2s; } .foot__meta a:hover { border-bottom-color: var(--text-faint); } /* ── reveal ────────────────────────────────────────────── */ [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); transition-delay: var(--d, 0ms); } [data-reveal].is-in { opacity: 1; transform: none; } @media (prefers-reduced-motion: reduce) { [data-reveal] { opacity: 1; transform: none; transition: none; } .eyebrow .dot { animation: none; } .hero__scroll span { animation: none; } .faq details p { animation: none; } }