:root{--bg-primary:#0a0e17;--bg-secondary:#111827;--bg-tertiary:#1f293d;--bg-card:rgba(17,24,39,0.85);--border-color:#283548;--border-focus:#6366f1;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--accent-primary:#6366f1;--accent-hover:#4f46e5;--accent-light:rgba(99,102,241,0.12);--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--shadow-sm:0 1px 3px rgba(0,0,0,0.3);--shadow-md:0 4px 14px rgba(0,0,0,0.4);--shadow-lg:0 10px 30px rgba(0,0,0,0.5);--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;--transition:all 0.2s cubic-bezier(0.4,0,0.2,1)}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden;-webkit-font-smoothing:antialiased}.container{width:100%;max-width:1240px;margin:0 auto;padding:0 1.5rem}.site-header{position:sticky;top:0;z-index:100;background:rgba(10,14,23,0.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color)}.navbar{display:flex;align-items:center;justify-content:space-between;height:4.25rem}.brand-logo{display:flex;align-items:center;gap:0.6rem;text-decoration:none;font-size:1.25rem;font-weight:700;color:var(--text-primary);letter-spacing:-0.02em}.brand-logo svg{width:2rem;height:2rem;color:var(--accent-primary)}.brand-logo span span{color:var(--accent-primary)}.nav-links{display:flex;align-items:center;gap:1.75rem;list-style:none}.nav-link{color:var(--text-secondary);text-decoration:none;font-size:0.95rem;font-weight:500;transition:var(--transition);display:inline-flex;align-items:center;gap:0.35rem}.nav-link:hover,.nav-link.active{color:var(--text-primary)}.nav-dropdown{position:relative}.dropdown-toggle{cursor:pointer;background:none;border:none;color:var(--text-secondary);font-size:0.95rem;font-weight:500;font-family:inherit;display:flex;align-items:center;gap:0.35rem;padding:0.5rem 0;transition:var(--transition)}.dropdown-toggle:hover{color:var(--text-primary)}.dropdown-toggle svg{transition:transform 0.2s ease}.dropdown-menu{position:absolute;top:100%;left:0;min-width:240px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);padding:0.5rem;opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity 0.2s ease,transform 0.2s ease,visibility 0.2s;z-index:105;list-style:none}.nav-dropdown:hover .dropdown-menu,.nav-dropdown:focus-within .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown:hover .dropdown-toggle svg{transform:rotate(180deg)}.dropdown-item{display:block;padding:0.6rem 0.85rem;color:var(--text-secondary);text-decoration:none;font-size:0.9rem;border-radius:var(--radius-sm);transition:var(--transition)}.dropdown-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.mobile-menu-btn{display:none;background:none;border:1px solid var(--border-color);color:var(--text-primary);padding:0.5rem;border-radius:var(--radius-sm);cursor:pointer}.breadcrumbs-section{padding:1.25rem 0 0.5rem}.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:0.5rem;list-style:none;font-size:0.85rem;color:var(--text-muted)}.breadcrumbs a{color:var(--text-secondary);text-decoration:none;transition:var(--transition)}.breadcrumbs a:hover{color:var(--accent-primary)}.breadcrumbs-sep{color:var(--text-muted)}.breadcrumbs-current{color:var(--text-primary);font-weight:500}.hero{padding:2.5rem 0 1.75rem;text-align:center}.hero-badge{display:inline-flex;align-items:center;gap:0.4rem;background:var(--accent-light);color:#a5b4fc;border:1px solid rgba(99,102,241,0.3);padding:0.35rem 0.85rem;border-radius:9999px;font-size:0.825rem;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;margin-bottom:1.25rem}.hero h1{font-size:clamp(2rem,4vw,2.85rem);font-weight:800;line-height:1.2;letter-spacing:-0.03em;color:#ffffff;margin-bottom:1rem}.hero h1 .highlight{background:linear-gradient(135deg,#a5b4fc 0%,#6366f1 50%,#c084fc 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero p{font-size:1.1rem;color:var(--text-secondary);max-width:760px;margin:0 auto;line-height:1.6}.app-container{padding:1.5rem 0 4rem}.app-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:2rem;display:grid;grid-template-columns:380px 1fr;gap:2rem}@media (max-width:1024px){.app-card{grid-template-columns:1fr;padding:1.5rem}}.controls-panel{display:flex;flex-direction:column;gap:1.75rem}.panel-header{border-bottom:1px solid var(--border-color);padding-bottom:1rem}.panel-title{font-size:1.15rem;font-weight:700;color:#fff;display:flex;align-items:center;gap:0.5rem}.panel-subtitle{font-size:0.85rem;color:var(--text-muted);margin-top:0.25rem}.preset-section label{font-size:0.825rem;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-secondary);font-weight:600;display:block;margin-bottom:0.5rem}.preset-pills{display:flex;flex-wrap:wrap;gap:0.4rem}.preset-btn{background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary);padding:0.4rem 0.75rem;font-size:0.8rem;font-weight:500;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition)}.preset-btn:hover{background:rgba(99,102,241,0.15);border-color:var(--accent-primary);color:#fff}.preset-btn.active{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.color-inputs-group{display:flex;flex-direction:column;gap:0.85rem}.input-row{display:flex;align-items:center;justify-content:space-between;gap:0.75rem;background:var(--bg-primary);border:1px solid var(--border-color);padding:0.6rem 0.85rem;border-radius:var(--radius-md);transition:var(--transition)}.input-row:focus-within{border-color:var(--border-focus)}.input-label-wrap{display:flex;flex-direction:column}.input-title{font-size:0.85rem;font-weight:600;color:var(--text-primary)}.input-hint{font-size:0.75rem;color:var(--text-muted)}.input-picker-wrap{display:flex;align-items:center;gap:0.5rem}.color-swatch-picker{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:2.25rem;height:2.25rem;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,0.2);cursor:pointer;background:transparent;padding:0;overflow:hidden}.color-swatch-picker::-webkit-color-swatch-wrapper{padding:0}.color-swatch-picker::-webkit-color-swatch{border:none;border-radius:var(--radius-sm)}.hex-input{width:5.5rem;background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary);font-family:var(--font-mono);font-size:0.85rem;padding:0.4rem 0.5rem;border-radius:var(--radius-sm);text-transform:uppercase}.hex-input:focus{outline:none;border-color:var(--accent-primary)}.config-group{display:flex;flex-direction:column;gap:1.25rem;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1rem}.config-item{display:flex;flex-direction:column;gap:0.4rem}.config-header{display:flex;align-items:center;justify-content:space-between}.config-title{font-size:0.825rem;font-weight:600;color:var(--text-secondary)}.config-value{font-size:0.8rem;font-family:var(--font-mono);color:#a5b4fc}.range-slider{width:100%;accent-color:var(--accent-primary);cursor:pointer;height:6px;background:var(--bg-tertiary);border-radius:3px}.base-tone-radios{display:grid;grid-template-columns:repeat(2,1fr);gap:0.5rem;margin-top:0.25rem}.tone-radio-label{display:flex;align-items:center;gap:0.45rem;font-size:0.775rem;color:var(--text-secondary);cursor:pointer;background:var(--bg-secondary);padding:0.45rem 0.6rem;border-radius:var(--radius-sm);border:1px solid var(--border-color);transition:var(--transition)}.tone-radio-label:hover{border-color:var(--accent-primary);color:#fff}.tone-radio-label input[type="radio"]{accent-color:var(--accent-primary)}.tone-radio-label.active{border-color:var(--accent-primary);background:rgba(99,102,241,0.12);color:#fff}.controls-actions{display:flex;gap:0.75rem}.btn-secondary{flex:1;background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary);padding:0.65rem 1rem;font-size:0.875rem;font-weight:600;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;justify-content:center;gap:0.5rem}.btn-secondary:hover{background:var(--bg-card);color:#fff;border-color:var(--text-muted)}.results-panel{display:flex;flex-direction:column;gap:1.75rem}.view-tabs{display:flex;border-bottom:1px solid var(--border-color);gap:1.5rem}.tab-btn{background:none;border:none;border-bottom:2px solid transparent;color:var(--text-secondary);padding:0.6rem 0.25rem;font-size:0.95rem;font-weight:600;font-family:inherit;cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;gap:0.45rem}.tab-btn:hover{color:var(--text-primary)}.tab-btn.active{color:var(--accent-primary);border-bottom-color:var(--accent-primary)}.surface-elevation-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:0.75rem}.elevation-card{border-radius:var(--radius-md);padding:0.85rem 0.75rem;border:1px solid rgba(255,255,255,0.08);display:flex;flex-direction:column;gap:0.4rem;box-shadow:var(--shadow-sm);transition:transform 0.2s ease,box-shadow 0.2s ease}.elevation-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.elev-label{font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:0.04em;opacity:0.75}.elev-hex{font-family:var(--font-mono);font-size:0.85rem;font-weight:700}.elev-meta{font-size:0.7rem;opacity:0.6}.contrast-badge{display:inline-flex;align-items:center;gap:0.25rem;font-size:0.68rem;font-weight:700;padding:0.15rem 0.45rem;border-radius:9999px;width:fit-content;margin-top:0.2rem}.contrast-pass{background:rgba(16,185,129,0.2);color:#34d399}.contrast-fail{background:rgba(239,68,68,0.2);color:#f87171}.accents-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.accent-compare-card{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1rem;display:flex;flex-direction:column;gap:0.75rem}.accent-title{font-size:0.85rem;font-weight:600;color:var(--text-secondary)}.swatch-compare-row{display:grid;grid-template-columns:1fr 1fr;gap:0.5rem}.swatch-box{padding:0.65rem;border-radius:var(--radius-sm);display:flex;flex-direction:column;gap:0.25rem;font-size:0.75rem;border:1px solid rgba(255,255,255,0.1)}.swatch-type{font-size:0.65rem;text-transform:uppercase;font-weight:700;opacity:0.8}.swatch-hex{font-family:var(--font-mono);font-weight:700}.accent-metrics{display:flex;align-items:center;justify-content:space-between;font-size:0.725rem;color:var(--text-muted);border-top:1px solid var(--border-color);padding-top:0.5rem}.component-preview-container{border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.5rem;background:#121212;transition:background-color 0.2s ease;display:flex;flex-direction:column;gap:1.25rem}.preview-topbar{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,0.1);padding-bottom:0.75rem}.preview-title{font-size:0.9rem;font-weight:700;display:flex;align-items:center;gap:0.5rem}.preview-badge{font-size:0.7rem;padding:0.15rem 0.5rem;border-radius:9999px;background:rgba(99,102,241,0.2);color:#a5b4fc}.preview-component-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem}@media (max-width:768px){.preview-component-grid{grid-template-columns:1fr}}.mock-card{border-radius:var(--radius-md);padding:1.25rem;display:flex;flex-direction:column;gap:1rem;border:1px solid rgba(255,255,255,0.08)}.mock-card-header{display:flex;align-items:center;justify-content:space-between}.mock-metric{font-size:1.75rem;font-weight:800;line-height:1}.mock-pill{font-size:0.75rem;font-weight:700;padding:0.25rem 0.6rem;border-radius:9999px}.mock-btn{border:none;font-weight:600;padding:0.65rem 1rem;border-radius:var(--radius-sm);cursor:pointer;text-align:center;font-size:0.85rem;transition:opacity 0.2s}.mock-btn:hover{opacity:0.9}.mock-form{border-radius:var(--radius-md);padding:1.25rem;display:flex;flex-direction:column;gap:0.85rem;border:1px solid rgba(255,255,255,0.08)}.mock-input{border-radius:var(--radius-sm);padding:0.55rem 0.75rem;font-size:0.85rem;border:1px solid rgba(255,255,255,0.15);background:rgba(0,0,0,0.25);color:inherit;width:100%}.export-panel{display:flex;flex-direction:column;gap:1rem}.export-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:0.5rem}.export-format-selector{display:flex;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:0.2rem;gap:0.2rem}.fmt-btn{background:none;border:none;color:var(--text-secondary);padding:0.35rem 0.75rem;font-size:0.775rem;font-weight:600;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition)}.fmt-btn.active{background:var(--accent-primary);color:#fff}.copy-btn{background:var(--accent-primary);border:none;color:#fff;padding:0.45rem 1rem;font-size:0.825rem;font-weight:600;border-radius:var(--radius-sm);cursor:pointer;display:inline-flex;align-items:center;gap:0.4rem;transition:var(--transition)}.copy-btn:hover{background:var(--accent-hover)}.code-output{background:#080b11;border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1.25rem;color:#e2e8f0;font-family:var(--font-mono);font-size:0.825rem;line-height:1.6;max-height:280px;overflow-y:auto;white-space:pre}.toast-notice{position:fixed;bottom:2rem;right:2rem;background:#10b981;color:#ffffff;padding:0.75rem 1.25rem;border-radius:var(--radius-md);font-weight:600;font-size:0.9rem;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(10px);transition:all 0.2s cubic-bezier(0.4,0,0.2,1);z-index:999}.toast-notice.show{opacity:1;visibility:visible;transform:translateY(0)}.more-tools-section{padding:3.5rem 0;background:rgba(17,24,39,0.4);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.section-header{text-align:center;margin-bottom:2.5rem}.section-title{font-size:1.85rem;font-weight:800;color:#ffffff;letter-spacing:-0.02em;margin-bottom:0.5rem}.section-desc{font-size:1rem;color:var(--text-secondary);max-width:650px;margin:0 auto}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.25rem}.tool-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.5rem;text-decoration:none;color:inherit;transition:var(--transition);display:flex;flex-direction:column;gap:0.75rem}.tool-card:hover{transform:translateY(-4px);border-color:var(--accent-primary);box-shadow:var(--shadow-md)}.tool-icon{width:2.75rem;height:2.75rem;border-radius:var(--radius-md);background:var(--accent-light);color:#a5b4fc;display:flex;align-items:center;justify-content:center}.tool-title{font-size:1.05rem;font-weight:700;color:#ffffff}.tool-desc{font-size:0.85rem;color:var(--text-secondary);line-height:1.5}.features-section{padding:4rem 0}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.5rem}.feature-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.75rem;display:flex;flex-direction:column;gap:0.85rem}.feature-icon-wrap{width:2.75rem;height:2.75rem;border-radius:var(--radius-md);background:rgba(99,102,241,0.15);color:#818cf8;display:flex;align-items:center;justify-content:center}.feature-card h3{font-size:1.15rem;font-weight:700;color:#ffffff}.feature-card p{font-size:0.9rem;color:var(--text-secondary);line-height:1.6}.how-section{padding:3.5rem 0;background:rgba(17,24,39,0.3);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem}.step-card{position:relative;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.75rem 1.5rem;display:flex;flex-direction:column;gap:0.75rem}.step-num{font-size:0.85rem;font-weight:800;color:var(--accent-primary);background:var(--accent-light);width:2rem;height:2rem;border-radius:9999px;display:flex;align-items:center;justify-content:center}.step-card h3{font-size:1.05rem;font-weight:700;color:#ffffff}.step-card p{font-size:0.875rem;color:var(--text-secondary);line-height:1.55}.article-section{padding:4.5rem 0}.article-content{max-width:820px;margin:0 auto;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:2.75rem;line-height:1.8;color:#cbd5e1}.article-content h2{font-size:1.75rem;font-weight:800;color:#ffffff;margin-bottom:1.25rem;letter-spacing:-0.02em}.article-content h3{font-size:1.25rem;font-weight:700;color:#f1f5f9;margin:1.75rem 0 0.75rem}.article-content p{font-size:0.975rem;margin-bottom:1.25rem}.article-content ul{margin:1rem 0 1.5rem 1.5rem;display:flex;flex-direction:column;gap:0.5rem}.article-content li{font-size:0.95rem}.article-callout{background:rgba(99,102,241,0.08);border-left:4px solid var(--accent-primary);padding:1rem 1.25rem;border-radius:0 var(--radius-md) var(--radius-md) 0;margin:1.5rem 0;font-size:0.925rem;color:#e0e7ff}.faq-section{padding:4rem 0;background:rgba(17,24,39,0.3);border-top:1px solid var(--border-color)}.faq-container{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:1rem}.faq-item{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:var(--transition)}.faq-item:hover{border-color:var(--accent-primary)}.faq-trigger{width:100%;display:flex;align-items:center;justify-content:space-between;padding:1.25rem 1.5rem;background:none;border:none;color:#ffffff;font-size:1.05rem;font-weight:600;text-align:left;cursor:pointer;font-family:inherit}.faq-trigger svg{transition:transform 0.25s ease;flex-shrink:0;margin-left:1rem}.faq-item.active .faq-trigger svg{transform:rotate(180deg)}.faq-content{max-height:0;overflow:hidden;transition:max-height 0.3s ease;padding:0 1.5rem;color:var(--text-secondary);font-size:0.925rem;line-height:1.65}.faq-item.active .faq-content{padding-bottom:1.25rem}.cta-section{padding:4.5rem 0}.cta-box{background:linear-gradient(135deg,rgba(99,102,241,0.15) 0%,rgba(139,92,246,0.1) 100%);border:1px solid rgba(99,102,241,0.3);border-radius:var(--radius-xl);padding:3rem 2rem;text-align:center}.cta-box h2{font-size:2rem;font-weight:800;color:#ffffff;margin-bottom:0.85rem}.cta-box p{font-size:1.05rem;color:var(--text-secondary);max-width:600px;margin:0 auto 1.75rem}.cta-btn{display:inline-flex;align-items:center;gap:0.5rem;background:var(--accent-primary);color:#ffffff;text-decoration:none;font-weight:700;font-size:1rem;padding:0.85rem 1.75rem;border-radius:var(--radius-md);transition:var(--transition);box-shadow:var(--shadow-md)}.cta-btn:hover{background:var(--accent-hover);transform:translateY(-2px)}.site-footer{margin-top:auto;background:#070a10;border-top:1px solid var(--border-color);padding:3.5rem 0 2rem;font-size:0.875rem;color:var(--text-muted)}.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2.5rem;padding-bottom:2.5rem;border-bottom:1px solid var(--border-color)}@media (max-width:768px){.footer-top{grid-template-columns:1fr;gap:2rem}}.footer-brand p{color:var(--text-secondary);margin-top:0.75rem;max-width:380px;line-height:1.6}.footer-heading{font-size:0.9rem;font-weight:700;color:#ffffff;text-transform:uppercase;letter-spacing:0.05em;margin-bottom:1rem}.footer-links{list-style:none;display:flex;flex-direction:column;gap:0.6rem}.footer-links a{color:var(--text-secondary);text-decoration:none;transition:var(--transition)}.footer-links a:hover{color:var(--accent-primary)}.footer-bottom{padding-top:2rem;display:flex;flex-direction:column;gap:1rem;font-size:0.8rem;color:var(--text-muted)}.footer-disclaimer{line-height:1.5}.footer-meta{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:0.5rem}