:root { --paper: #f5f1e8; --paper-raised: #fffdf7; --ink: #1c1a15; --ink-soft: #5a5646; --rule: #d8d0bc; --rule-strong: #b9ae8c; --accent: #b5482f; --accent-soft: #f0ded7; --focus: #1c1a15; --radius: 3px; --radius-sm: 3px; --radius-md: 6px; } /* ---------- Dark theme ---------- Toggled via [data-theme="dark"] on (set by the anti-FOUC inline script in index.html). Same token names as the light palette above are redefined here — every rule below already reads var(--paper)/var(--ink)/ etc., so the whole page repaints without touching component styles. */ html[data-theme="dark"] { --paper: #1b1914; --paper-raised: #262319; --ink: #ece6d6; --ink-soft: #b7ae95; --rule: #3a362a; --rule-strong: #55503e; --accent: #e2825f; --accent-soft: #3a2620; --focus: #ece6d6; } * { box-sizing: border-box; } html { color-scheme: light; } html[data-theme="dark"] { color-scheme: dark; } body { margin: 0; background: var(--paper); background-image: linear-gradient(var(--rule) 1px, transparent 1px); background-size: 100% 2.4rem; color: var(--ink); font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif; line-height: 1.5; min-height: 100vh; /* Defense-in-depth for 320-500px viewports (verified via CDP: no overflow found today, but nothing on this page needs horizontal scroll, so guard against future regressions at the document level). */ overflow-x: hidden; } .page { max-width: 1080px; margin: 0 auto; padding: 2.5rem 1.5rem 5rem; } /* ---------- Masthead (standardized 2-line header — same class names as the portal/web-countdown; keep in sync if this pattern changes) ---------- */ .masthead { padding-bottom: 1.15rem; } .masthead-rule { border: none; border-top: 2px solid var(--ink); margin: 0 0 2.5rem; } .masthead-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; } .masthead-brand { display: flex; align-items: center; gap: 0.65rem; min-width: 0; } .home-icon { display: inline-flex; align-items: center; justify-content: center; width: 2.1rem; height: 2.1rem; flex-shrink: 0; border-radius: 50%; color: var(--ink-soft); text-decoration: none; transition: background-color 0.12s ease, color 0.12s ease; } .home-icon:hover { background: var(--accent-soft); color: var(--ink); } .home-icon:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; } @media (prefers-reduced-motion: reduce) { .home-icon { transition: none; } } .brand-tile { display: inline-flex; align-items: center; justify-content: center; width: 2.1rem; height: 2.1rem; flex-shrink: 0; border-radius: var(--radius-md); background: var(--ink); color: var(--paper); font-size: 1.05rem; } .brand-tile img { display: block; width: 1.25rem; height: 1.25rem; /* External SVGs do not inherit currentColor. Brand-tile is ink-on-paper inverted (dark tile / paper glyph). Force monochrome paint to match. */ filter: brightness(0) invert(1); } html[data-theme="dark"] .brand-tile img { /* Dark theme: --ink tile is light; keep icon dark. */ filter: brightness(0); } .brand-title { font-size: clamp(1.3rem, 3.2vw, 1.6rem); margin: 0; min-width: 0; font-weight: 700; letter-spacing: -0.01em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; } .masthead-actions { display: flex; align-items: center; gap: 0.6rem; flex-shrink: 0; } .theme-toggle { position: relative; width: 2.1rem; height: 2.1rem; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--rule-strong); border-radius: 50%; background: var(--paper-raised); color: var(--ink-soft); cursor: pointer; transition: border-color 0.12s ease, color 0.12s ease, transform 0.1s ease; } .theme-toggle:hover { border-color: var(--ink); color: var(--ink); } .theme-toggle:active { transform: scale(0.94); } .theme-toggle:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; } .theme-icon { position: absolute; width: 1.1rem; height: 1.1rem; transition: opacity 0.15s ease, transform 0.15s ease; } .theme-icon--sun { opacity: 1; transform: scale(1) rotate(0deg); } .theme-icon--moon { opacity: 0; transform: scale(0.5) rotate(-40deg); } html[data-theme="dark"] .theme-icon--sun { opacity: 0; transform: scale(0.5) rotate(40deg); } html[data-theme="dark"] .theme-icon--moon { opacity: 1; transform: scale(1) rotate(0deg); } @media (prefers-reduced-motion: reduce) { .theme-toggle, .theme-icon { transition: none; } } .masthead-sub { font-family: "SFMono-Regular", "JetBrains Mono", ui-monospace, monospace; font-size: 0.85rem; color: var(--ink-soft); margin: 0.6rem 0 0; max-width: 46ch; } .converter { max-width: 640px; margin: 2.5rem auto 0; background: var(--paper-raised); border: 1px solid var(--rule); border-radius: 6px; padding: 1.5rem; } .tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--rule); margin-bottom: 1.75rem; } .tab { font-family: "SFMono-Regular", "JetBrains Mono", ui-monospace, monospace; font-size: 0.8rem; letter-spacing: 0.03em; text-transform: uppercase; background: none; border: none; border-bottom: 2px solid transparent; color: var(--ink-soft); padding: 0.6rem 0.9rem; cursor: pointer; } .tab:hover { color: var(--ink); } .tab:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; } .tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); } .panel[hidden] { display: none; } .field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; } .field { display: flex; flex-direction: column; gap: 0.4rem; } .field label { font-family: "SFMono-Regular", "JetBrains Mono", ui-monospace, monospace; font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); } .field input, .field select { font-family: inherit; font-size: 1.05rem; padding: 0.6rem 0.65rem; background: var(--paper); border: 1px solid var(--rule); border-radius: var(--radius); color: var(--ink); } .field input:focus-visible, .field select:focus-visible { outline: 2px solid var(--focus); outline-offset: 1px; } .result-output { font-size: 1.05rem; padding: 0.6rem 0.65rem; background: var(--accent-soft); border: 1px solid var(--rule); border-radius: var(--radius); color: var(--ink); font-variant-numeric: tabular-nums; } .swap-row { display: flex; justify-content: center; color: var(--ink-soft); margin: 0.85rem 0; } .swap-glyph { font-size: 1rem; } .page-footer { margin-top: 2.5rem; text-align: center; font-family: "SFMono-Regular", "JetBrains Mono", ui-monospace, monospace; font-size: 0.75rem; color: var(--ink-soft); } .app-version { margin-top: 0.35rem; opacity: 0.6; } .app-version:empty { display: none; } @media (max-width: 480px) { .field-row { grid-template-columns: 1fr; } } /* Verified via CDP at 320/375/414/500px: no horizontal overflow found on this page. This block only lifts the masthead's two interactive controls to the 44x44px minimum touch target. */ @media (max-width: 500px) { .home-icon, .theme-toggle { width: 2.75rem; height: 2.75rem; } /* When the title wraps and pushes .masthead-actions to its own line, margin-left: auto keeps it pinned to the right instead of collapsing to flex-start (space-between has nothing to distribute for a lone item on a wrapped line). */ .masthead-actions { margin-left: auto; } }