/* ============================================================ CSS Custom Properties — single source of truth for all theme values. Change here to restyle the whole app. ============================================================ */ :root { /* Brand — teal/cyan */ --color-bg: #0f1923; --color-surface: #172130; --color-border: #243347; --color-header-from: #006d77; --color-header-to: #004e57; --color-primary: #00b4d8; --color-primary-dark: #0096b4; --color-text: #dce8f0; --color-text-muted: #6b8a9e; --color-placeholder: #3a5268; --color-footer-link: #48cae4; /* Diff highlight pairs — kept vivid so they pop on dark bg */ --hl-line-remove-bg: #4d0000; --hl-line-remove-fg: #ffcdd2; --hl-line-add-bg: #003d40; --hl-line-add-fg: #b2ebf2; --hl-word-remove-bg: #4a0030; --hl-word-remove-fg: #f8bbd0; --hl-word-add-bg: #00263a; --hl-word-add-fg: #b2dfdb; --hl-char-remove-bg: #3e2000; --hl-char-remove-fg: #ffe0b2; --hl-char-add-bg: #1a0040; --hl-char-add-fg: #e1bee7; /* Spacing & shape */ --radius: 6px; --gap: 12px; --font-mono: 'Fira Mono', 'Consolas', 'Menlo', monospace; } /* ============================================================ Light theme — overrides every color token when .light is on ============================================================ */ body.light { --color-bg: #f0f7fa; --color-surface: #ffffff; --color-border: #c5dde8; --color-header-from: #0096b4; --color-header-to: #006d77; --color-primary: #006d77; --color-primary-dark: #004e57; --color-text: #0d2535; --color-text-muted: #4a7a8e; --color-placeholder: #8ab4c2; --color-footer-link: #0077a8; --hl-line-remove-bg: #fde8e8; --hl-line-remove-fg: #b71c1c; --hl-line-add-bg: #e0f7fa; --hl-line-add-fg: #004d40; --hl-word-remove-bg: #fce4ec; --hl-word-remove-fg: #880e4f; --hl-word-add-bg: #e0f2f1; --hl-word-add-fg: #004d40; --hl-char-remove-bg: #fff3e0; --hl-char-remove-fg: #e65100; --hl-char-add-bg: #ede7f6; --hl-char-add-fg: #4a148c; } /* ============================================================ Reset / Base ============================================================ */ *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } /* Ensure the HTML `hidden` attribute always wins over display rules */ [hidden] { display: none !important; } html, body { height: 100%; } body { background: var(--color-bg); color: var(--color-text); font-family: var(--font-mono); font-size: 14px; display: flex; flex-direction: column; min-height: 100vh; } /* ============================================================ Header ============================================================ */ .site-header { background: linear-gradient(135deg, var(--color-header-from) 0%, var(--color-header-to) 100%); /* Diagonal stripe texture — distinct from any grid pattern */ background-image: linear-gradient(135deg, var(--color-header-from) 0%, var(--color-header-to) 100%), repeating-linear-gradient( -45deg, transparent, transparent 18px, rgba(255,255,255,.04) 18px, rgba(255,255,255,.04) 19px ); padding: 32px 16px 24px; text-align: center; } /* Icon above the title */ .site-logo { font-size: 2rem; line-height: 1; margin-bottom: 6px; color: rgba(255,255,255,.85); user-select: none; } .site-title { font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 800; color: #fff; letter-spacing: -0.5px; font-family: 'Segoe UI', system-ui, sans-serif; line-height: 1; } /* Subtitle tagline */ .site-tagline { margin-top: 6px; font-size: clamp(0.75rem, 2vw, 0.9rem); color: rgba(255,255,255,.65); font-family: 'Segoe UI', system-ui, sans-serif; letter-spacing: 0.3px; } /* ============================================================ Toolbar ============================================================ */ .toolbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--gap); padding: 12px 16px; background: var(--color-surface); border-bottom: 1px solid var(--color-border); } .toolbar-group { display: flex; align-items: center; gap: 8px; } /* On mobile, center group fills the row and center-aligns */ .toolbar-center { flex: 1; justify-content: center; } /* ============================================================ Buttons ============================================================ */ .btn { padding: 7px 16px; border: 1px solid var(--color-border); border-radius: var(--radius); background: transparent; color: var(--color-text); cursor: pointer; font-size: 13px; font-family: inherit; transition: background 0.15s, border-color 0.15s, color 0.15s; white-space: nowrap; } .btn:hover { background: rgba(255,255,255,.07); border-color: #666; } .btn:active { background: rgba(255,255,255,.12); } /* Theme toggle — icon-only pill */ .btn-theme { padding: 6px 10px; font-size: 16px; line-height: 1; border-radius: var(--radius); } body.light .btn-theme { background: rgba(0,0,0,.06); } body.light .btn:hover { background: rgba(0,0,0,.08); border-color: #bbb; } body.light .btn:active { background: rgba(0,0,0,.14); } /* Primary = green Compare button */ .btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; font-weight: 600; padding: 8px 28px; font-size: 14px; } .btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); } /* ============================================================ Mode Bar (pill toggle) ============================================================ */ .mode-bar { display: flex; align-items: center; justify-content: center; gap: 0; padding: 8px 16px; background: var(--color-surface); border-bottom: 1px solid var(--color-border); } .mode-option { cursor: pointer; user-select: none; } /* Hide the real radio input; style the label span as a pill segment */ .mode-option input[type="radio"] { position: absolute; opacity: 0; width: 0; height: 0; } .mode-option span { display: inline-block; padding: 5px 18px; border: 1px solid var(--color-border); color: var(--color-text-muted); font-size: 13px; transition: background 0.15s, color 0.15s; background: transparent; } /* Join segments into a single pill shape */ .mode-option:first-child span { border-radius: var(--radius) 0 0 var(--radius); } .mode-option:last-child span { border-radius: 0 var(--radius) var(--radius) 0; border-left: none; } .mode-option:not(:first-child):not(:last-child) span { border-left: none; } /* Active / checked state */ .mode-option input[type="radio"]:checked + span { background: var(--color-primary); border-color: var(--color-primary); color: #fff; font-weight: 600; } .mode-option span:hover { background: rgba(255,255,255,.06); } /* ============================================================ Main Area & Panels ============================================================ */ .main-area { flex: 1; display: flex; flex-direction: column; /* Allow mobile panels to expand beyond viewport and scroll naturally */ overflow: visible; } /* Panels wrapper: flex row on desktop, column on mobile (default) */ .panels { display: flex; flex-direction: column; /* mobile-first: stacked */ width: 100%; /* always fill the container width */ } .text-panel { /* Fixed height on mobile so both panels are equally visible */ height: 260px; min-height: 160px; padding: 14px; background: var(--color-bg); color: var(--color-text); border: none; outline: none; resize: vertical; font-family: var(--font-mono); font-size: 13px; line-height: 1.6; overflow-y: auto; word-wrap: break-word; white-space: pre-wrap; } textarea.text-panel::placeholder { color: var(--color-placeholder); } /* Thin divider between panels */ .panel-divider { width: 100%; height: 2px; background: var(--color-border); flex-shrink: 0; } /* Diff output panels are read-only divs */ .diff-output { resize: none; cursor: default; } /* ============================================================ Diff Highlight Classes Each mode gets its own remove/add pair so colors stay distinct. ============================================================ */ /* --- Line mode --- */ .hl-line-remove { background: var(--hl-line-remove-bg); color: var(--hl-line-remove-fg); display: block; } .hl-line-add { background: var(--hl-line-add-bg); color: var(--hl-line-add-fg); display: block; } /* --- Word mode --- */ .hl-word-remove { background: var(--hl-word-remove-bg); color: var(--hl-word-remove-fg); border-radius: 3px; } .hl-word-add { background: var(--hl-word-add-bg); color: var(--hl-word-add-fg); border-radius: 3px; } /* --- Character mode --- */ .hl-char-remove { background: var(--hl-char-remove-bg); color: var(--hl-char-remove-fg); border-radius: 2px; } .hl-char-add { background: var(--hl-char-add-bg); color: var(--hl-char-add-fg); border-radius: 2px; } /* ============================================================ Footer ============================================================ */ .site-footer { padding: 14px 16px; text-align: center; border-top: 1px solid var(--color-border); font-family: sans-serif; } /* Footer links are buttons styled to look like links */ .footer-link { background: none; border: none; cursor: pointer; color: var(--color-footer-link); font-size: 13px; font-family: inherit; padding: 0; text-decoration: none; } .footer-link:hover { text-decoration: underline; } .footer-sep { margin: 0 8px; color: var(--color-text-muted); } .footer-copy { margin-top: 6px; font-size: 11px; color: var(--color-text-muted); } /* GitHub anchor links in footer — same look as the button footer-links */ a.footer-link { display: inline-flex; align-items: center; gap: 4px; text-decoration: none; } a.footer-link:hover { text-decoration: underline; } /* Small inline GitHub mark */ .gh-icon { width: 13px; height: 13px; fill: currentColor; flex-shrink: 0; vertical-align: middle; } /* ============================================================ Modals ============================================================ */ .modal { background: var(--color-surface); color: var(--color-text); border: 1px solid var(--color-border); border-radius: calc(var(--radius) * 2); padding: 0; max-width: 480px; width: calc(100% - 32px); box-shadow: 0 8px 32px rgba(0,0,0,.45); font-family: sans-serif; } /* Native