/* StudyBuddy public site — "Cuaderno". Tokens copied from the app (frontend/src/index.css); the design is docs/superpowers/plans/D-11-visual-identity.md. THE RULE: --field is a surface and is never an action. --action is saturated and appears only on what you click or earn. --deep is the same hue for thin marks. --red is deadlines only. Action fills carry ink text; red fills white. */ @font-face { font-family: 'Inter'; font-style: normal; font-weight: 100 900; font-display: swap; src: url('/fonts/inter-latin-wght.woff2') format('woff2'); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; } @font-face { font-family: 'Bricolage Grotesque'; font-style: normal; font-weight: 600 800; font-display: swap; src: url('/fonts/bricolage-grotesque-latin-wght.woff2') format('woff2'); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; } :root { --field: #f2f6de; --action: #d6f24a; --deep: #7a9417; --ink: #12121c; --red: #d92135; --on-action: #12121c; --on-page: #f1f4e3; --paper: #fcfbf8; --sheet: #ffffff; --grid: #dde4f1; --ink-soft: #5a5c6e; --ink-faint: #8b8d9c; --biro: #2340e8; --page: #12121c; --offset: #12121c; --r: 16px; --r-lg: 36px; --border: 2.5px; --content: 1160px; color-scheme: light dark; } /* Dark tokens — "pizarra". The visitor's choice wins (`.dark` / `.light` on , set by the theme script); with no choice, the system decides. The two blocks below declare the same tokens, and site-output.test.ts fails if they ever drift apart. Not an inversion: --ink becomes chalk and keeps its two jobs (text and every border), --deep brightens instead of darkening, and the hard offset becomes true black, because depth still falls away from the light. --action, --on-action, --red and --on-page do not change. */ @media (prefers-color-scheme: dark) { :root:not(.light) { --paper: #13160e; --sheet: #1d2216; --field: #262f19; --page: #0a0b06; --grid: rgba(238, 242, 223, 0.07); --ink: #eef2df; --ink-soft: #b3bba2; --ink-faint: #8b9380; --deep: #b4d63c; --biro: #8fa2ff; --offset: #000000; } } :root.dark { --paper: #13160e; --sheet: #1d2216; --field: #262f19; --page: #0a0b06; --grid: rgba(238, 242, 223, 0.07); --ink: #eef2df; --ink-soft: #b3bba2; --ink-faint: #8b9380; --deep: #b4d63c; --biro: #8fa2ff; --offset: #000000; } *, *::before, *::after { box-sizing: border-box; } html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; /* The header is sticky at 68px; anchors must clear it. */ scroll-padding-top: 84px; } @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } } body { margin: 0; background: var(--page); color: var(--ink); font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; font-size: 16px; line-height: 1.55; -webkit-font-smoothing: antialiased; } img, svg { display: block; max-width: 100%; } h1, h2, h3, p { margin: 0; } ul, ol { margin: 0; padding: 0; list-style: none; } /* Links are the biro — the pen the student writes with. */ a { color: var(--biro); text-underline-offset: 3px; } a:hover { color: var(--biro); } :focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; border-radius: 4px; } /* Display face: headings, numbers and button labels. */ h1, h2, h3, .display { font-family: 'Bricolage Grotesque', 'Inter', sans-serif; font-weight: 800; letter-spacing: -0.035em; line-height: 0.98; } .num { font-family: 'Bricolage Grotesque', 'Inter', sans-serif; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: -0.03em; } .visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; } /* Tactility without WebGL: one grain layer over the colour fields. */ .grain { position: relative; isolation: isolate; } .grain::after { content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 3; opacity: 0.45; mix-blend-mode: multiply; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.2'/%3E%3C/svg%3E"); } .wrap { width: 100%; max-width: var(--content); margin: 0 auto; padding: 0 20px; } @media (min-width: 640px) { .wrap { padding: 0 28px; } } .narrow { max-width: 820px; } .muted { color: var(--ink-faint); font-size: 14px; } .skip { position: absolute; left: 16px; top: -64px; z-index: 40; padding: 10px 18px; background: var(--sheet); color: var(--ink); border: var(--border) solid var(--ink); border-radius: 999px; box-shadow: 0 4px 0 var(--offset); } .skip:focus { top: 12px; } /* ── Buttons: thick ink border, hard offset, pill ─────────── */ .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 56px; padding: 15px 28px; border: var(--border) solid var(--ink); border-radius: 999px; font: 700 17px/1 'Bricolage Grotesque', 'Inter', sans-serif; letter-spacing: -0.02em; text-decoration: none; cursor: pointer; color: var(--ink); background: var(--sheet); box-shadow: 0 5px 0 var(--offset); transition: transform 90ms ease, box-shadow 90ms ease; } .btn:hover { color: var(--ink); } .btn:active { transform: translateY(4px); box-shadow: 0 1px 0 var(--offset); } /* On --field a lime fill would vanish in light mode, hence the ink inversion; on the dark board it reads, so the primary button fills normally. */ .btn-primary { background: var(--ink); color: var(--action); } .btn-primary:hover { color: var(--action); } @media (prefers-color-scheme: dark) { :root:not(.light) .btn-primary, :root:not(.light) .btn-primary:hover { background: var(--action); color: var(--on-action); } } :root.dark .btn-primary, :root.dark .btn-primary:hover { background: var(--action); color: var(--on-action); } /* On a white sheet the fill reads as itself. */ .btn-go { background: var(--action); color: var(--on-action); } .btn-secondary { background: var(--sheet); color: var(--ink); } .btn-quiet { min-height: 42px; padding: 11px 18px; font-size: 14px; box-shadow: 0 3px 0 var(--offset); } /* ── Header ──────────────────────────────────────────────── */ .site-header { position: sticky; top: 0; z-index: 20; background: var(--field); border-bottom: var(--border) solid var(--ink); } .header-inner { display: flex; align-items: center; gap: 26px; min-height: 68px; } .brand { display: flex; align-items: center; gap: 11px; font: 800 20px/1 'Bricolage Grotesque', 'Inter', sans-serif; letter-spacing: -0.04em; color: var(--ink); text-decoration: none; flex: none; } .brand:hover { color: var(--ink); } .brand-mark { flex: none; } .section-nav { display: none; gap: 20px; font-size: 14px; font-weight: 600; } .section-nav a { color: var(--ink); opacity: 0.66; text-decoration: none; } .section-nav a:hover { color: var(--ink); opacity: 1; } @media (min-width: 960px) { .section-nav { display: flex; } } .header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; } /* Language is navigation, not an action: ink, never --action. */ .langs { display: flex; gap: 2px; font-size: 12px; font-weight: 700; } .lang { padding: 6px 10px; border-radius: 999px; color: var(--ink); opacity: 0.45; text-decoration: none; } .lang:hover { color: var(--ink); opacity: 0.8; } .lang[aria-current='true'] { background: var(--ink); color: var(--field); opacity: 1; } @media (max-width: 559px) { .header-actions .btn { display: none; } .brand { font-size: 18px; } } /* ── Theme toggle ────────────────────────────────────────── */ /* On a phone it is a control in the header, next to the language switcher: nothing floats over the page, so it cannot land on a sheet, a demo panel or a link at any scroll position. From 560px there is margin to spare and it lifts out to the bottom right, where PR #142 put it. */ .theme-toggle { display: none; width: 40px; height: 40px; flex: none; align-items: center; justify-content: center; border: var(--border) solid var(--ink); border-radius: 50%; background: var(--sheet); color: var(--ink); cursor: pointer; box-shadow: 0 3px 0 var(--offset); } .has-js .theme-toggle { display: inline-flex; } .theme-toggle .icon { width: 19px; height: 19px; } @media (min-width: 560px) { .theme-toggle { position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); z-index: 30; width: 52px; height: 52px; box-shadow: 0 4px 0 var(--offset); } .theme-toggle .icon { width: 22px; height: 22px; } } .theme-toggle:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--offset); } /* No transition on the swap: the icon is either one or the other, whatever the motion setting. */ .theme-toggle .icon-sun, :root.dark .theme-toggle .icon-moon { display: none; } :root.dark .theme-toggle .icon-sun { display: block; } @media (prefers-color-scheme: dark) { :root:not(.light) .theme-toggle .icon-moon { display: none; } :root:not(.light) .theme-toggle .icon-sun { display: block; } } /* ── Hero ────────────────────────────────────────────────── */ .hero { background: var(--field); padding: 56px 0 0; overflow: hidden; } .hero-grid { display: grid; grid-template-columns: 1fr; gap: 16px; align-items: end; } @media (min-width: 900px) { .hero { padding: 74px 0 0; } .hero-grid { grid-template-columns: 1.28fr 0.72fr; gap: 28px; } } h1 { font-size: clamp(40px, 6.6vw, 96px); line-height: 0.95; max-width: 12.5em; } .lead { margin-top: 24px; font-size: clamp(17px, 1.4vw, 19px); line-height: 1.5; max-width: 27em; font-weight: 500; color: var(--ink-soft); } .actions { margin-top: 32px; display: flex; gap: 13px; flex-wrap: wrap; } .note { margin: 18px 0 40px; font-size: 13px; color: var(--ink-faint); max-width: 28em; } @media (min-width: 900px) { .note { margin-bottom: 60px; } } /* The buddy: the student's own apuntes, awake. */ .buddy { width: 100%; max-width: 220px; margin: 0 auto -6px; } @media (min-width: 900px) { .buddy { max-width: 400px; justify-self: end; margin-right: 0; } } /* ── Trophy strip ────────────────────────────────────────── */ .strip { background: var(--page); color: var(--on-page); } .strip-in { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px 20px; padding: 32px 0 26px; } @media (min-width: 760px) { .strip-in { grid-template-columns: repeat(4, 1fr); } } .trophy-value { font-size: clamp(34px, 3.4vw, 46px); line-height: 1; display: block; color: var(--action); } .trophy-label { font-size: 13px; color: #9b9dad; margin-top: 7px; display: block; } .strip-note { padding: 0 0 30px; font-size: 13px; color: #9b9dad; } /* ── Bands ───────────────────────────────────────────────── */ /* 22px squared paper under the ink outline, with the top corners rolled over. */ .section { background-color: var(--paper); background-image: linear-gradient(to right, var(--grid) 1px, transparent 1px), linear-gradient(to bottom, var(--grid) 1px, transparent 1px); background-size: 22px 22px; border: var(--border) solid var(--ink); border-bottom: none; border-radius: var(--r-lg) var(--r-lg) 0 0; padding: 56px 0 64px; } /* A band of --field between two paper ones; it is a surface, never an action. */ .section-alt { background: var(--field); background-image: none; border: none; border-top: var(--border) solid var(--ink); border-bottom: var(--border) solid var(--ink); border-radius: 0; padding: 56px 0 64px; } @media (min-width: 960px) { .section, .section-alt { padding: 64px 0 76px; } } h2 { font-size: clamp(30px, 4vw, 48px); } .section-lead { margin-top: 12px; font-size: 17px; color: var(--ink-soft); max-width: 34em; } /* Sheets, and the tabs that make them a page in a binder. */ .sheet, .card, .step { background: var(--sheet); border: var(--border) solid var(--ink); border-radius: var(--r); box-shadow: 5px 5px 0 var(--offset); padding: 22px; } .tab { display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px 7px; background: var(--field); border: var(--border) solid var(--ink); border-bottom: none; border-radius: 12px 12px 0 0; font: 700 14px/1 'Bricolage Grotesque', 'Inter', sans-serif; color: var(--ink); } .tabbed > .sheet, .tabbed > .step-sheet { border-radius: 0 var(--r) var(--r) var(--r); } /* ── How it works ────────────────────────────────────────── */ .steps { display: grid; grid-template-columns: 1fr; gap: 22px; margin-top: 40px; } @media (min-width: 860px) { .steps { grid-template-columns: repeat(3, 1fr); } } .step { padding: 0; background: none; border: none; box-shadow: none; border-radius: 0; } .step-sheet { background: var(--sheet); border: var(--border) solid var(--ink); border-radius: 0 var(--r) var(--r) var(--r); box-shadow: 5px 5px 0 var(--offset); padding: 22px; } .step h3 { font-size: 19px; line-height: 1.15; font-weight: 700; letter-spacing: -0.025em; } .step p { margin-top: 9px; font-size: 14.5px; color: var(--ink-soft); } /* ── Feature cards ───────────────────────────────────────── */ .cards { display: grid; grid-template-columns: 1fr; gap: 20px; margin-top: 40px; } @media (min-width: 700px) { .cards { grid-template-columns: repeat(2, 1fr); } } @media (min-width: 1000px) { .cards { grid-template-columns: repeat(3, 1fr); } } .card h3 { font-size: 17.5px; line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; margin-top: 12px; } .card p { margin-top: 8px; font-size: 14px; color: var(--ink-soft); } .card .icon, .promise .icon { width: 38px; height: 38px; padding: 8px; border: 2px solid var(--ink); border-radius: 11px; background: var(--field); color: var(--ink); } /* ── Demo session ────────────────────────────────────────── */ /* The tab has to travel with the sheet, so the frame carries the centring. */ .demo-frame { max-width: 660px; margin: 44px auto 0; } .demo { background: var(--sheet); border: var(--border) solid var(--ink); border-radius: 0 var(--r) var(--r) var(--r); box-shadow: 5px 5px 0 var(--offset); padding: 20px; } .demo-bar { display: none; } .demo-body { display: block; } .bubble { border: 2px solid var(--ink); border-radius: 15px; padding: 13px 16px; font-size: 15px; } /* The student's own voice is the biro. In the dark it lifts, so its text flips to the dark on-fill colour. */ .bubble-student { background: var(--biro); color: #fff; margin-left: 48px; border-bottom-right-radius: 4px; } @media (prefers-color-scheme: dark) { :root:not(.light) .bubble-student { color: var(--on-action); } } :root.dark .bubble-student { color: var(--on-action); } .bubble-tutor { background: var(--sheet); margin: 12px 40px 0 0; border-bottom-left-radius: 4px; } .demo-source { display: flex; width: fit-content; align-items: center; gap: 7px; margin-top: 12px; padding: 5px 11px; border: 2px solid var(--ink); border-radius: 999px; background: var(--field); font-size: 12px; font-weight: 600; } .demo-source .icon { width: 14px; height: 14px; } /* A dashed ink rule: the sheet is torn above the quiz. */ .demo-quiz { margin-top: 18px; border-top: var(--border) dashed var(--ink); padding-top: 16px; } .demo-quiz-label { font: 700 13px 'Bricolage Grotesque', 'Inter', sans-serif; color: var(--ink-soft); } .demo-quiz-question { margin-top: 7px; font-size: 16px; font-weight: 600; } .demo-options { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; } .demo-options li { padding: 10px 17px; border: 2px solid var(--ink); border-radius: 999px; font-size: 14.5px; font-weight: 600; background: var(--sheet); } /* The right answer is earned, so it takes the action colour. */ .demo-options .is-picked { background: var(--action); color: var(--on-action); box-shadow: 0 3px 0 var(--offset); } /* ── Privacy: quiet on purpose, two columns ──────────────── */ .promises { display: grid; grid-template-columns: 1fr; gap: 26px 44px; margin-top: 38px; } @media (min-width: 800px) { .promises { grid-template-columns: 1fr 1fr; } } .promise { display: flex; gap: 14px; align-items: flex-start; } .promise h3 { font-size: 16px; line-height: 1.2; font-weight: 700; } .promise p { margin-top: 7px; font-size: 14.5px; color: var(--ink-soft); } .more { margin-top: 30px; font-weight: 600; } /* ── FAQ ─────────────────────────────────────────────────── */ .faq { margin-top: 34px; border-top: 2px solid var(--ink); } .faq details { border-bottom: 2px solid var(--ink); } .faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 2px; font: 700 17px/1.3 'Bricolage Grotesque', 'Inter', sans-serif; letter-spacing: -0.02em; cursor: pointer; list-style: none; } .faq summary::-webkit-details-marker { display: none; } .faq summary::after { content: '+'; font-size: 24px; line-height: 1; color: var(--deep); } .faq details[open] summary::after { content: '–'; } .faq p { padding: 0 44px 20px 2px; font-size: 15px; color: var(--ink-soft); } /* ── Closing CTA ─────────────────────────────────────────── */ .cta { background: var(--page); background-image: none; border: none; border-radius: 0; color: var(--on-page); text-align: center; padding: 72px 0; } .cta h2 { font-size: clamp(30px, 4.2vw, 50px); } .cta p { margin: 14px auto 0; max-width: 30em; color: #a9abbb; font-size: 17px; } .cta .btn { margin-top: 30px; background: var(--action); color: var(--on-action); box-shadow: 0 5px 0 #6f8814; } /* ── Footer ──────────────────────────────────────────────── */ .site-footer { background: var(--page); color: var(--on-page); /* The bottom padding keeps the floating theme button clear of the last link. */ padding: 48px 0 calc(32px + 56px); overflow: hidden; } .footer-grid { display: flex; gap: 56px; flex-wrap: wrap; font-size: 14px; } .footer-heading { font: 700 14px 'Bricolage Grotesque', 'Inter', sans-serif; letter-spacing: 0; color: var(--action); margin-bottom: 10px; } .site-footer a { color: #9b9dad; text-decoration: none; display: block; padding: 3px 0; } .site-footer a:hover { color: var(--on-page); } .site-footer .brand-footer { color: var(--on-page); margin-bottom: 10px; } .site-footer .muted { color: #6f7183; } .footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-top: 36px; } .footer-bottom .lang { color: #9b9dad; display: inline-block; } .footer-bottom .lang[aria-current='true'] { background: var(--on-page); color: var(--page); } /* The wordmark as the closing graphic. */ .wordmark { font-family: 'Bricolage Grotesque', 'Inter', sans-serif; margin-bottom: calc(-32px - 56px); font-weight: 800; font-size: clamp(64px, 15.4vw, 228px); line-height: 0.8; letter-spacing: -0.05em; color: var(--action); margin: 26px 0 -12px; user-select: none; } /* ── Shared icon box ─────────────────────────────────────── */ .icon { width: 24px; height: 24px; flex: none; } /* ── Closing CTA inner ───────────────────────────────────── */ .cta-inner { display: grid; justify-items: center; } .cta-inner p { color: #a9abbb; } .cta-inner .btn { margin-top: 30px; } /* ── Footer lists ────────────────────────────────────────── */ .site-footer nav a { color: #9b9dad; } .site-footer li + li { margin-top: 2px; } .site-footer .langs a { display: inline-block; padding: 6px 10px; } /* ── 404 ─────────────────────────────────────────────────── */ .not-found { display: grid; gap: 32px; max-width: 560px; margin: 0 auto; background: var(--paper); color: var(--ink); /* The bottom padding keeps the floating theme button clear of the last link. */ padding: 64px 16px calc(64px + 56px); } .not-found-block { display: grid; justify-items: start; gap: 8px; padding-top: 24px; border-top: 2px solid var(--ink); } .not-found-block h1, .not-found-block h2 { font-size: 28px; } .not-found-block p { color: var(--ink-soft); } .not-found-block .btn { margin-top: 8px; }