/** * styles.css — ListDiff Design System & Styles * =============================================== * This single CSS file contains the ENTIRE visual design of ListDiff. * * ARCHITECTURE: * 1. CSS Custom Properties (variables) at the top — all colors, spacing, fonts * 2. Reset / base styles * 3. Layout (header, main, footer) * 4. Component styles (panels, toolbars, buttons, results) * 5. Theme toggle component * 6. Split dialog (modal) * 7. Toast notifications * 8. Animations / keyframes * 9. Responsive breakpoints * * THEMING: * All colors use CSS custom properties. A single [data-theme="dark"] * selector on swaps every color on the page instantly. */ /* ============================================================ GOOGLE FONTS IMPORT Using Inter — a clean, modern sans-serif designed for screens. ============================================================ */ @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap'); /* ============================================================ 1. CSS CUSTOM PROPERTIES All design tokens live here. Change a variable, and the entire UI updates. This is the foundation of the design system. ============================================================ */ :root { /* --- Colors: Light Theme (default) --- */ --bg-primary: #F8FAFC; --bg-surface: #FFFFFF; --bg-surface-alt: #F1F5F9; --bg-surface-hover: #E2E8F0; --text-primary: #0F172A; --text-secondary: #475569; --text-muted: #94A3B8; --border: #E2E8F0; --border-focus: #3B82F6; /* Accent */ --accent: #3B82F6; --accent-hover: #2563EB; --accent-light: #DBEAFE; --accent-text: #FFFFFF; /* Result section colors */ --a-only-bg: #EFF6FF; --a-only-border: #BFDBFE; --a-only-header: #1E40AF; --a-only-badge: #3B82F6; --b-only-bg: #FFFBEB; --b-only-border: #FDE68A; --b-only-header: #92400E; --b-only-badge: #D97706; --intersection-bg: #ECFDF5; --intersection-border: #A7F3D0; --intersection-header: #065F46; --intersection-badge: #059669; --union-bg: #F5F3FF; --union-border: #DDD6FE; --union-header: #5B21B6; --union-badge: #7C3AED; /* Shadows */ --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05); --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04); --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04); /* Spacing */ --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-5: 20px; --space-6: 24px; --space-8: 32px; --space-10: 40px; --space-12: 48px; /* Border radius */ --radius-sm: 6px; --radius-md: 8px; --radius-lg: 12px; --radius-full: 9999px; /* Typography */ --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif; --font-size-xs: 0.75rem; --font-size-sm: 0.875rem; --font-size-base: 1rem; --font-size-lg: 1.125rem; --font-size-xl: 1.25rem; --font-size-2xl: 1.5rem; --font-size-3xl: 1.875rem; /* Transitions */ --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1); --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1); --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1); /* Theme toggle specific */ --toggle-bg: #E2E8F0; --toggle-knob: #F59E0B; --toggle-icon-active: #F59E0B; --toggle-icon-inactive: #94A3B8; } /* --- Colors: Dark Theme --- */ [data-theme="dark"] { --bg-primary: #0F172A; --bg-surface: #1E293B; --bg-surface-alt: #334155; --bg-surface-hover: #475569; --text-primary: #F1F5F9; --text-secondary: #CBD5E1; --text-muted: #64748B; --border: #334155; --border-focus: #38BDF8; --accent: #38BDF8; --accent-hover: #22D3EE; --accent-light: #0C4A6E; --accent-text: #0F172A; --a-only-bg: #1E293B; --a-only-border: #1E40AF; --a-only-header: #60A5FA; --a-only-badge: #3B82F6; --b-only-bg: #1E293B; --b-only-border: #92400E; --b-only-header: #FBBF24; --b-only-badge: #D97706; --intersection-bg: #1E293B; --intersection-border: #065F46; --intersection-header: #34D399; --intersection-badge: #059669; --union-bg: #1E293B; --union-border: #5B21B6; --union-header: #A78BFA; --union-badge: #7C3AED; --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3); --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3); --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3); --toggle-bg: #475569; --toggle-knob: #818CF8; --toggle-icon-active: #818CF8; --toggle-icon-inactive: #475569; } /* ============================================================ 2. RESET & BASE STYLES ============================================================ */ *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; } body { font-family: var(--font-family); font-size: var(--font-size-base); line-height: 1.6; color: var(--text-primary); background-color: var(--bg-primary); transition: background-color var(--transition-slow), color var(--transition-slow); min-height: 100vh; display: flex; flex-direction: column; } /* ============================================================ 3. LAYOUT ============================================================ */ /* --- Header --- */ .header { background: var(--bg-surface); border-bottom: 1px solid var(--border); padding: var(--space-4) var(--space-6); display: flex; align-items: center; justify-content: space-between; box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 100; transition: background-color var(--transition-slow), border-color var(--transition-slow); } .header__brand { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--text-primary); } .header__logo { width: 36px; height: 36px; } .header__title { font-size: var(--font-size-xl); font-weight: 700; color: var(--text-primary); letter-spacing: -0.02em; } .header__tagline { font-size: var(--font-size-sm); color: var(--text-muted); margin-left: var(--space-2); padding-left: var(--space-3); border-left: 1px solid var(--border); } /* --- Main Content --- */ .main { flex: 1; max-width: 1200px; width: 100%; margin: 0 auto; padding: var(--space-8) var(--space-6); } /* --- Footer --- */ .footer { background: var(--bg-surface); border-top: 1px solid var(--border); padding: var(--space-4) var(--space-6); text-align: center; color: var(--text-muted); font-size: var(--font-size-sm); transition: background-color var(--transition-slow), border-color var(--transition-slow); } .footer span { margin: 0 var(--space-2); } .footer__heart { color: #ef4444; margin: 0 2px; } /* ============================================================ 4. INPUT PANELS ============================================================ */ .input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); margin-bottom: var(--space-8); } .input-panel { background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); overflow: hidden; transition: border-color var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-slow); } .input-panel:focus-within { border-color: var(--border-focus); box-shadow: var(--shadow-lg), 0 0 0 3px var(--accent-light); } .input-panel__header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-3) var(--space-4); background: var(--bg-surface-alt); border-bottom: 1px solid var(--border); transition: background-color var(--transition-slow); } .input-panel__label { font-weight: 600; font-size: var(--font-size-sm); color: var(--text-primary); text-transform: uppercase; letter-spacing: 0.05em; } .input-panel__stats { display: flex; gap: var(--space-3); font-size: var(--font-size-xs); color: var(--text-secondary); } .input-panel__stat { display: flex; align-items: center; gap: var(--space-1); } .input-panel__stat-value { font-weight: 600; color: var(--accent); min-width: 1.5em; text-align: center; } .input-panel textarea { width: 100%; min-height: 220px; padding: var(--space-4); border: none; outline: none; resize: vertical; font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace; font-size: var(--font-size-sm); line-height: 1.7; color: var(--text-primary); background: var(--bg-surface); transition: background-color var(--transition-slow), color var(--transition-slow); } .input-panel textarea::placeholder { color: var(--text-muted); } /* --- Input Toolbar --- */ .input-toolbar { display: flex; flex-wrap: wrap; gap: var(--space-1); padding: var(--space-2) var(--space-3); background: var(--bg-surface-alt); border-top: 1px solid var(--border); transition: background-color var(--transition-slow); } /* ============================================================ 5. BUTTONS ============================================================ */ /* --- Icon Button (toolbar) --- */ .btn-icon { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-1); padding: var(--space-1) var(--space-2); border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-surface); color: var(--text-secondary); font-size: var(--font-size-xs); font-family: var(--font-family); font-weight: 500; cursor: pointer; transition: all var(--transition-fast); white-space: nowrap; } .btn-icon:hover { background: var(--bg-surface-hover); color: var(--text-primary); border-color: var(--text-muted); } /* Clear button specific "danger" hover state */ .btn-icon[data-action="clear"]:hover { background-color: #fee2e2; color: #b91c1c; border-color: #fca5a5; } [data-theme="dark"] .btn-icon[data-action="clear"]:hover { background-color: #450a0a; color: #f87171; border-color: #991b1b; } .btn-icon:active { transform: scale(0.95); } .btn-icon svg { width: 14px; height: 14px; stroke-width: 2; } /* --- Primary Button (Compare) --- */ .btn-primary { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); padding: var(--space-3) var(--space-8); border: none; border-radius: var(--radius-md); background: linear-gradient(135deg, var(--accent), var(--accent-hover)); color: var(--accent-text); font-family: var(--font-family); font-size: var(--font-size-base); font-weight: 600; cursor: pointer; transition: all var(--transition-normal); box-shadow: var(--shadow-md), 0 0 0 0 rgba(59, 130, 246, 0); position: relative; overflow: hidden; } .btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg), 0 0 20px rgba(59, 130, 246, 0.3); } .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); } /* Subtle pulse glow animation on hover */ .btn-primary::after { content: ''; position: absolute; inset: 0; border-radius: inherit; opacity: 0; transition: opacity var(--transition-normal); background: radial-gradient(circle at center, rgba(255,255,255,0.2) 0%, transparent 70%); } .btn-primary:hover::after { opacity: 1; } .btn-primary .shortcut-hint { font-size: var(--font-size-xs); opacity: 0.7; font-weight: 400; } /* ============================================================ 6. OPTIONS PANEL ============================================================ */ .options-panel { background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-5); margin-bottom: var(--space-6); box-shadow: var(--shadow-sm); transition: background-color var(--transition-slow), border-color var(--transition-slow); } .options-panel__title { font-size: var(--font-size-sm); font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-4); } .options-grid { display: flex; flex-wrap: wrap; gap: var(--space-4) var(--space-8); align-items: center; } /* --- Checkbox --- */ .checkbox-label { display: inline-flex; align-items: center; gap: var(--space-2); cursor: pointer; font-size: var(--font-size-sm); color: var(--text-primary); user-select: none; transition: color var(--transition-slow); } .checkbox-label input[type="checkbox"] { width: 18px; height: 18px; border: 2px solid var(--border); border-radius: 4px; appearance: none; -webkit-appearance: none; cursor: pointer; position: relative; background: var(--bg-surface); transition: all var(--transition-fast); } .checkbox-label input[type="checkbox"]:checked { background: var(--accent); border-color: var(--accent); } .checkbox-label input[type="checkbox"]:checked::after { content: ''; position: absolute; top: 2px; left: 5px; width: 5px; height: 9px; border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg); } .checkbox-label input[type="checkbox"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; } /* --- Select Dropdown --- */ .select-wrapper { display: flex; align-items: center; gap: var(--space-2); } .select-wrapper label { font-size: var(--font-size-sm); color: var(--text-secondary); white-space: nowrap; } .select-wrapper select { padding: var(--space-2) var(--space-3); border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-surface); color: var(--text-primary); font-family: var(--font-family); font-size: var(--font-size-sm); cursor: pointer; appearance: none; -webkit-appearance: none; padding-right: var(--space-8); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 8px center; transition: all var(--transition-fast); } .select-wrapper select:hover { border-color: var(--text-muted); } .select-wrapper select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); } /* ============================================================ 7. COMPARE BUTTON AREA ============================================================ */ .compare-section { display: flex; justify-content: center; margin-bottom: var(--space-10); } /* ============================================================ 8. RESULTS SECTION ============================================================ */ .results-section { display: none; opacity: 0; transform: translateY(20px); transition: opacity var(--transition-slow), transform var(--transition-slow); } .results-section.visible { display: block; opacity: 1; transform: translateY(0); animation: fadeSlideUp 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards; } .results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); } /* --- Result Panel --- */ .result-panel { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); transition: box-shadow var(--transition-normal); } .result-panel:hover { box-shadow: var(--shadow-lg); } .result-panel__header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-3) var(--space-4); font-weight: 600; font-size: var(--font-size-sm); } .result-panel__title { display: flex; align-items: center; gap: var(--space-2); } .result-panel__count { display: inline-flex; align-items: center; justify-content: center; min-width: 28px; height: 28px; padding: 0 var(--space-2); border-radius: var(--radius-full); font-size: var(--font-size-sm); font-weight: 700; color: white; } /* Animation for count badges */ .result-panel__count.pop { animation: popIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; } .result-panel textarea { width: 100%; min-height: 150px; padding: var(--space-3) var(--space-4); border: none; outline: none; resize: vertical; font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace; font-size: var(--font-size-sm); line-height: 1.7; color: var(--text-primary); background: var(--bg-surface); transition: background-color var(--transition-slow), color var(--transition-slow); } .result-toolbar { display: flex; flex-wrap: wrap; gap: var(--space-1); padding: var(--space-2) var(--space-3); border-top: 1px solid var(--border); background: var(--bg-surface-alt); transition: background-color var(--transition-slow); } /* --- Color coding per result type --- */ .result-panel--a-only { border: 1px solid var(--a-only-border); background: var(--a-only-bg); } .result-panel--a-only .result-panel__header { background: var(--a-only-bg); color: var(--a-only-header); } .result-panel--a-only .result-panel__count { background: var(--a-only-badge); } .result-panel--b-only { border: 1px solid var(--b-only-border); background: var(--b-only-bg); } .result-panel--b-only .result-panel__header { background: var(--b-only-bg); color: var(--b-only-header); } .result-panel--b-only .result-panel__count { background: var(--b-only-badge); } .result-panel--intersection { border: 1px solid var(--intersection-border); background: var(--intersection-bg); } .result-panel--intersection .result-panel__header { background: var(--intersection-bg); color: var(--intersection-header); } .result-panel--intersection .result-panel__count { background: var(--intersection-badge); } .result-panel--union { border: 1px solid var(--union-border); background: var(--union-bg); } .result-panel--union .result-panel__header { background: var(--union-bg); color: var(--union-header); } .result-panel--union .result-panel__count { background: var(--union-badge); } /* ============================================================ 9. THEME TOGGLE A pill-shaped toggle with sun/moon icons and slide animation. ============================================================ */ .theme-toggle { display: flex; align-items: center; justify-content: space-between; width: 64px; height: 32px; padding: 3px; border: none; border-radius: var(--radius-full); background: var(--toggle-bg); cursor: pointer; position: relative; transition: background-color var(--transition-normal); } .theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; } .theme-toggle__icon { width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; z-index: 1; transition: color var(--transition-normal), transform var(--transition-normal); font-size: 14px; } .theme-toggle__icon--sun { color: var(--toggle-icon-active); } .theme-toggle__icon--moon { color: var(--toggle-icon-inactive); } .theme-toggle--dark .theme-toggle__icon--sun { color: var(--toggle-icon-inactive); } .theme-toggle--dark .theme-toggle__icon--moon { color: var(--toggle-icon-active); } .theme-toggle__knob { position: absolute; top: 3px; left: 3px; width: 26px; height: 26px; border-radius: 50%; background: white; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); transition: transform var(--transition-normal); } /* When dark mode, slide knob to the right */ .theme-toggle--dark .theme-toggle__knob { transform: translateX(32px); } /* Bounce animation on click */ .theme-toggle__knob.animate { animation: knobBounce 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); } /* Icon rotation on theme change */ .theme-toggle--dark .theme-toggle__icon--moon { animation: iconSpin 0.5s ease; } .theme-toggle:not(.theme-toggle--dark) .theme-toggle__icon--sun { animation: iconSpin 0.5s ease; } /* ============================================================ 10. SPLIT DIALOG (Modal) ============================================================ */ .dialog-overlay { display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(4px); z-index: 200; align-items: center; justify-content: center; opacity: 0; transition: opacity var(--transition-normal); } .dialog-overlay.visible { display: flex; opacity: 1; } .dialog { background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-6); width: 90%; max-width: 400px; box-shadow: var(--shadow-lg); animation: fadeSlideUp 0.3s cubic-bezier(0.22, 1, 0.36, 1) forwards; } .dialog__title { font-size: var(--font-size-lg); font-weight: 600; margin-bottom: var(--space-4); color: var(--text-primary); } .dialog__body { margin-bottom: var(--space-5); } .dialog__body select, .dialog__body input { width: 100%; padding: var(--space-2) var(--space-3); border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-surface); color: var(--text-primary); font-family: var(--font-family); font-size: var(--font-size-sm); margin-top: var(--space-2); } .dialog__body label { font-size: var(--font-size-sm); color: var(--text-secondary); display: block; margin-bottom: var(--space-1); } .dialog__actions { display: flex; gap: var(--space-3); justify-content: flex-end; } .btn-dialog { padding: var(--space-2) var(--space-4); border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-surface); color: var(--text-primary); font-family: var(--font-family); font-size: var(--font-size-sm); font-weight: 500; cursor: pointer; transition: all var(--transition-fast); } .btn-dialog:hover { background: var(--bg-surface-hover); } .btn-dialog--primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); } .btn-dialog--primary:hover { background: var(--accent-hover); } #split-custom-wrapper { display: none; margin-top: var(--space-3); } /* ============================================================ 11. TOAST NOTIFICATIONS ============================================================ */ #toast-container { position: fixed; bottom: var(--space-6); right: var(--space-6); z-index: 300; display: flex; flex-direction: column; gap: var(--space-2); pointer-events: none; } .toast { background: var(--text-primary); color: var(--bg-primary); padding: var(--space-3) var(--space-5); border-radius: var(--radius-md); font-size: var(--font-size-sm); font-weight: 500; box-shadow: var(--shadow-lg); opacity: 0; transform: translateX(100%); transition: all var(--transition-normal); pointer-events: auto; } .toast.visible { opacity: 1; transform: translateX(0); } /* ============================================================ 12. ANIMATIONS / KEYFRAMES ============================================================ */ /* Count badge pop-in animation */ @keyframes popIn { 0% { transform: scale(0); opacity: 0; } 50% { transform: scale(1.3); } 100% { transform: scale(1); opacity: 1; } } /* Results section slide up */ @keyframes fadeSlideUp { 0% { opacity: 0; transform: translateY(20px); } 100% { opacity: 1; transform: translateY(0); } } /* Theme toggle knob bounce */ @keyframes knobBounce { 0% { transform: scale(1); } 30% { transform: scale(0.85); } 60% { transform: scale(1.1); } 100% { transform: scale(1); } } /* Combined with dark mode position */ .theme-toggle--dark .theme-toggle__knob.animate { animation: knobBounceDark 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); } @keyframes knobBounceDark { 0% { transform: translateX(32px) scale(1); } 30% { transform: translateX(32px) scale(0.85); } 60% { transform: translateX(32px) scale(1.1); } 100% { transform: translateX(32px) scale(1); } } /* Icon spin */ @keyframes iconSpin { 0% { transform: rotate(0deg) scale(0.8); } 100% { transform: rotate(360deg) scale(1); } } /* ============================================================ 14. SIDEBAR (HISTORY) ============================================================ */ .sidebar { position: fixed; top: 0; right: -320px; /* Hidden by default on the right */ width: 320px; height: 100%; background: var(--bg-surface); border-left: 1px solid var(--border); box-shadow: -4px 0 16px rgba(0, 0, 0, 0.1); z-index: 2000; transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; } .sidebar--open { right: 0; } .sidebar-header { padding: var(--space-4) var(--space-6); border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; background: var(--bg-primary); } .sidebar-header h2 { font-size: var(--font-size-base); font-weight: 600; margin: 0; } .sidebar-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-muted); line-height: 1; } .sidebar-content { flex: 1; overflow-y: auto; padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-3); } .history-item { position: relative; padding: var(--space-4); background: var(--bg-primary); border: 1px solid var(--border); border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition-normal); animation: fadeSlideUp 0.3s ease-out; } .history-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); transform: translateY(-2px); } .history-item__id { font-family: var(--font-family-mono); font-size: var(--font-size-xs); font-weight: 600; color: var(--accent); display: block; margin-bottom: 4px; } .history-item__time { font-size: var(--font-size-xs); color: var(--text-muted); display: block; } .history-item__delete { position: absolute; top: var(--space-2); right: var(--space-2); width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; background: transparent; border: none; border-radius: 50%; color: var(--text-muted); cursor: pointer; transition: all var(--transition-fast); } .history-item__delete:hover { background: #fee2e2; color: #ef4444; } [data-theme="dark"] .history-item__delete:hover { background: #450a0a; color: #fca5a5; } /* Sidebar Overlay */ .sidebar-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4); backdrop-filter: blur(2px); z-index: 1999; opacity: 0; visibility: hidden; transition: all 0.3s ease; } .sidebar-overlay--visible { opacity: 1; visibility: visible; } /* Header History Toggle */ .header__actions { display: flex; align-items: center; gap: var(--space-3); } .history-toggle { display: none; /* Controlled by JS based on history presence */ width: 40px; height: 40px; align-items: center; justify-content: center; background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-md); cursor: pointer; color: var(--text-secondary); transition: all var(--transition-normal); font-size: 1.1rem; } .history-toggle:hover { border-color: var(--accent); color: var(--accent); } /* ============================================================ 15. LIVE HIGHLIGHTING & DRAG-DROP ============================================================ */ .textarea-container { position: relative; width: 100%; } .textarea-backdrop { position: absolute; top: 0; left: 0; width: 100%; height: 100%; padding: var(--space-4); /* Match textarea padding exactly */ font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace; /* Match textarea font exactly */ font-size: var(--font-size-sm); /* Match textarea font-size exactly */ line-height: 1.7; /* Match textarea line-height exactly */ color: transparent; white-space: pre-wrap; word-wrap: break-word; pointer-events: none; z-index: 0; border: none; /* Removed 1px border to match textarea exactly */ overflow: hidden; box-sizing: border-box; } .textarea-backdrop mark { background-color: rgba(59, 130, 246, 0.15); color: transparent; border-radius: 2px; padding: 0; margin: 0; border: none; font: inherit; line-height: inherit; } [data-theme="dark"] .textarea-backdrop mark { background-color: rgba(56, 189, 248, 0.15); } .input-panel textarea { position: relative; background: transparent !important; z-index: 1; display: block; width: 100%; margin: 0; } .input-panel.drag-over { border-color: var(--accent); background-color: rgba(59, 130, 246, 0.05); box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1); } [data-theme="dark"] .input-panel.drag-over { background-color: rgba(56, 189, 248, 0.05); box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1); } /* ============================================================ 16. QUICK COPY & FLOATING UI ============================================================ */ .result-header { position: relative; } .quick-copy { position: absolute; top: 8px; right: 8px; background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: var(--space-1) var(--space-2); font-size: 0.85rem; color: var(--text-secondary); cursor: pointer; display: flex; align-items: center; gap: var(--space-1); transition: all var(--transition-fast); z-index: 20; overflow: visible; /* Prevent flash-text from getting clipped */ } .quick-copy:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); } .quick-copy:active { transform: scale(0.95); } .quick-copy .copy-icon { font-size: 0.9rem; } .quick-copy .flash-text { position: absolute; right: 100%; margin-right: 8px; background: var(--accent); color: #fff; padding: 4px 8px; border-radius: var(--radius-sm); font-size: 0.75rem; font-weight: 600; white-space: nowrap; opacity: 0; visibility: hidden; transform: translateX(10px); transition: all 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28); pointer-events: none; box-shadow: var(--shadow-sm); } .quick-copy.flashing .flash-text { opacity: 1; visibility: visible; transform: translateX(0); } .quick-copy.flashing .copy-icon { animation: flarePop 0.4s ease; } @keyframes flarePop { 0% { transform: scale(1); } 50% { transform: scale(1.4); filter: brightness(1.5); } 100% { transform: scale(1); } } /* ============================================================ 13. RESPONSIVE DESIGN ============================================================ */ /* Tablet and below */ @media (max-width: 768px) { .header { padding: var(--space-3) var(--space-4); } .header__tagline { display: none; } .main { padding: var(--space-4) var(--space-3); } .input-grid { grid-template-columns: 1fr; gap: var(--space-4); } .results-grid { grid-template-columns: 1fr; gap: var(--space-4); } .input-panel textarea { min-height: 160px; } .options-grid { gap: var(--space-3) var(--space-4); } .btn-primary { width: 100%; padding: var(--space-4); } } /* Small phones */ @media (max-width: 480px) { .header__title { font-size: var(--font-size-base); } .input-toolbar { gap: 2px; } .btn-icon { padding: 2px 4px; font-size: 0.65rem; } }