:root{--primary:#4f46e5;--primary-hover:#4338ca;--primary-light:#eef2ff;--bg:#ffffff;--surface:#f8fafc;--surface-2:#f1f5f9;--text:#0f172a;--text-muted:#64748b;--border:#e2e8f0;--border-focus:#4f46e5;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.05);--shadow:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -2px rgba(0,0,0,0.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -4px rgba(0,0,0,0.1);--radius:12px;--radius-sm:8px;--font-sans:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;--font-heading:'Outfit',sans-serif}[data-theme="dark"]{--primary:#6366f1;--primary-hover:#4f46e5;--primary-light:rgba(99,102,241,0.15);--bg:#090d16;--surface:#111827;--surface-2:#1f2937;--text:#f8fafc;--text-muted:#94a3b8;--border:#1f2937;--border-focus:#6366f1;--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.4);--shadow:0 4px 6px -1px rgba(0,0,0,0.4);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.5)}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);background-color:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;transition:background-color 0.25s ease,color 0.25s ease}a{color:var(--primary);text-decoration:none;transition:color 0.2s ease}a:hover{color:var(--primary-hover)}img{max-width:100%;height:auto;display:block}button,input,select,textarea{font-family:inherit}.container{max-width:1240px;margin:0 auto;padding:0 20px;width:100%}.navbar{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,0.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:all 0.2s ease}[data-theme="dark"] .navbar{background:rgba(15,23,42,0.88)}.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:70px}.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-heading);font-weight:700;font-size:1.35rem;color:var(--text);text-decoration:none}.brand-icon{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),#06b6d4);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:1.2rem;box-shadow:0 4px 10px rgba(79,70,229,0.3)}.nav-links{display:flex;align-items:center;gap:24px;list-style:none}.nav-item{position:relative}.nav-link{font-weight:500;font-size:0.92rem;color:var(--text);display:flex;align-items:center;gap:6px;padding:8px 12px;border-radius:var(--radius-sm);transition:all 0.2s ease;cursor:pointer}.nav-link:hover,.nav-link.active{background:var(--surface-2);color:var(--primary)}.dropdown-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(4px);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:18px;min-width:620px;display:none;grid-template-columns:repeat(3,1fr);gap:8px 16px;z-index:1100;opacity:0;pointer-events:none;transition:opacity 0.2s ease,transform 0.2s ease}.nav-item:hover .dropdown-menu,.dropdown-menu.show{display:grid;opacity:1;pointer-events:auto;transform:translateX(-50%) translateY(0)}.dropdown-item{font-size:0.84rem;color:var(--text);padding:7px 10px;border-radius:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:all 0.15s ease}.dropdown-item:hover{background:var(--primary-light);color:var(--primary);transform:translateX(3px)}.nav-actions{display:flex;align-items:center;gap:12px}.theme-toggle{background:var(--surface-2);border:1px solid var(--border);color:var(--text);width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.2s ease}.theme-toggle:hover{border-color:var(--primary);transform:rotate(15deg)}.mobile-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer}.breadcrumb{padding:16px 0 0 0;font-size:0.85rem;color:var(--text-muted);display:flex;align-items:center;gap:8px;flex-wrap:wrap}.breadcrumb a{color:var(--text-muted)}.breadcrumb a:hover{color:var(--primary)}.breadcrumb-separator{font-size:0.75rem}.hero{padding:30px 0 35px;text-align:center}.badge{display:inline-flex;align-items:center;gap:6px;background:var(--primary-light);color:var(--primary);padding:5px 14px;border-radius:999px;font-size:0.82rem;font-weight:600;margin-bottom:16px;text-transform:uppercase;letter-spacing:0.05em}.hero-title{font-family:var(--font-heading);font-size:2.75rem;font-weight:800;line-height:1.2;margin-bottom:16px;color:var(--text);letter-spacing:-0.02em}.hero-title span{background:linear-gradient(135deg,var(--primary),#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-desc{font-size:1.15rem;color:var(--text-muted);max-width:780px;margin:0 auto 28px;line-height:1.55}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;font-size:0.92rem;font-weight:600;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:all 0.2s ease;text-decoration:none;white-space:nowrap}.btn-primary{background:var(--primary);color:#ffffff}.btn-primary:hover{background:var(--primary-hover);box-shadow:0 4px 12px rgba(79,70,229,0.35);transform:translateY(-1px)}.btn-secondary{background:var(--surface-2);color:var(--text);border-color:var(--border)}.btn-secondary:hover{background:var(--border);color:var(--text)}.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}.btn-outline:hover{background:var(--primary);color:#fff}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#059669;box-shadow:0 4px 12px rgba(16,185,129,0.35)}.btn-danger{background:transparent;color:var(--danger);border-color:rgba(239,68,68,0.3)}.btn-danger:hover{background:var(--danger);color:#fff}.btn-sm{padding:6px 12px;font-size:0.82rem;border-radius:6px}.btn:disabled,.btn[disabled]{opacity:0.6;cursor:not-allowed;pointer-events:none}.matrix-app-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg);padding:28px;margin-bottom:40px;display:flex;flex-direction:column;gap:22px}.section-box{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:18px;box-shadow:var(--shadow-sm)}.section-header-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}.section-header-text{max-width:600px}.section-heading{font-family:var(--font-heading);font-size:1.35rem;font-weight:700;color:var(--text);margin-bottom:4px}.section-subtext{font-size:0.9rem;color:var(--text-muted);line-height:1.45}.preset-group{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.preset-label{font-size:0.82rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.04em}.preset-buttons{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.preset-btn{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:6px 13px;border-radius:999px;font-size:0.82rem;font-weight:600;cursor:pointer;transition:all 0.2s ease}.preset-btn:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}.chips-list{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.color-chip-item{display:flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:6px 10px;transition:all 0.2s ease}.color-chip-item:hover,.color-chip-item:focus-within{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.chip-swatch{width:30px;height:30px;border-radius:8px;border:1px solid rgba(0,0,0,0.18);position:relative;cursor:pointer;flex-shrink:0;overflow:hidden;box-shadow:inset 0 0 2px rgba(0,0,0,0.2)}.native-chip-picker{position:absolute;top:-8px;left:-8px;width:50px;height:50px;opacity:0;cursor:pointer}.chip-inputs{display:flex;align-items:center;gap:6px}.chip-name-input{background:transparent;border:none;font-size:0.85rem;font-weight:600;color:var(--text);width:86px;outline:none}.chip-hex-input{background:transparent;border:none;font-family:monospace;font-size:0.85rem;font-weight:700;color:var(--text);width:72px;outline:none;text-transform:uppercase}.chip-remove-btn{background:transparent;border:none;color:var(--danger);width:26px;height:26px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.15rem;transition:all 0.15s ease;line-height:1}.chip-remove-btn:hover{background:rgba(239,68,68,0.15);color:#dc2626}.palette-actions-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:14px;border-top:1px solid var(--border)}.sub-hint{font-size:0.82rem;color:var(--text-muted)}.matrix-ctrl-bar{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:14px 18px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;box-shadow:var(--shadow-sm)}.filter-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.filter-label{font-size:0.84rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.03em}.filter-btn-group{display:inline-flex;background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:3px;gap:2px;flex-wrap:wrap}.filter-btn{padding:6px 12px;border-radius:6px;border:none;background:transparent;color:var(--text);font-size:0.82rem;font-weight:600;cursor:pointer;transition:all 0.2s ease}.filter-btn:hover{color:var(--primary)}.filter-btn.active{background:var(--primary);color:#ffffff;box-shadow:0 2px 6px rgba(79,70,229,0.35)}.stats-pills{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.stat-pill{display:flex;align-items:center;gap:6px;background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:6px 12px;font-size:0.82rem}.stat-lbl{color:var(--text-muted);font-weight:500}.stat-num{font-family:monospace;font-weight:800;color:var(--text)}.stat-pass{background:rgba(16,185,129,0.12);border-color:rgba(16,185,129,0.35)}.stat-pass .stat-num{color:#059669}.stat-aaa{background:rgba(79,70,229,0.12);border-color:rgba(79,70,229,0.35)}.stat-aaa .stat-num{color:var(--primary)}.stat-fail{background:rgba(239,68,68,0.12);border-color:rgba(239,68,68,0.35)}.stat-fail .stat-num{color:#dc2626}.matrix-scroll-hint{display:flex;align-items:center;gap:8px;font-size:0.84rem;color:var(--text-muted);background:var(--surface-2);border:1px dashed var(--border);padding:8px 14px;border-radius:var(--radius-sm)}.matrix-scroll-hint svg{flex-shrink:0;color:var(--primary)}.matrix-wrapper{overflow:auto;max-height:min(650px,80vh);background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:8px;position:relative;-webkit-overflow-scrolling:touch;box-shadow:var(--shadow-sm)}.matrix-wrapper::-webkit-scrollbar{width:8px;height:8px}.matrix-wrapper::-webkit-scrollbar-track{background:var(--surface-2);border-radius:4px}.matrix-wrapper::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}[data-theme="dark"] .matrix-wrapper::-webkit-scrollbar-thumb{background:#334155}.matrix-table{width:100%;border-collapse:separate;border-spacing:5px;text-align:center}.matrix-th-corner{position:sticky;top:0;left:0;z-index:30;background:var(--surface-2) !important;color:var(--text-muted) !important;padding:12px 14px;border-radius:8px;font-size:0.74rem;font-weight:800;text-transform:uppercase;letter-spacing:0.04em;border:1px solid var(--border);box-shadow:2px 2px 5px rgba(0,0,0,0.08)}.matrix-th-col{position:sticky;top:0;z-index:20;padding:10px 12px;border-radius:8px;font-size:0.8rem;font-weight:700;min-width:110px;border:1px solid rgba(0,0,0,0.12);box-shadow:0 3px 6px rgba(0,0,0,0.08)}.matrix-th-row{position:sticky;left:0;z-index:20;padding:10px 12px;border-radius:8px;font-size:0.8rem;font-weight:700;text-align:left;white-space:nowrap;min-width:120px;border:1px solid rgba(0,0,0,0.12);box-shadow:3px 0 6px rgba(0,0,0,0.08)}.matrix-cell{padding:10px 8px;border-radius:8px;cursor:pointer;position:relative;user-select:none;min-width:110px;height:68px;display:flex;flex-direction:column;justify-content:space-between;align-items:center;border:1px solid rgba(0,0,0,0.1);transition:transform 0.15s ease,box-shadow 0.15s ease,outline 0.15s ease;outline:2px solid transparent}.matrix-cell:hover,.matrix-cell:focus-visible{transform:scale(1.05);box-shadow:var(--shadow-lg);z-index:15;outline:2px solid var(--primary)}.cell-ratio-val{font-family:monospace;font-weight:800;font-size:0.95rem;line-height:1.2}.cell-badge-pill{font-size:0.68rem;font-weight:800;padding:2px 7px;border-radius:4px;text-transform:uppercase;letter-spacing:0.04em;display:inline-block}.badge-aaa{background:rgba(16,185,129,0.25);color:#065f46;border:1px solid rgba(16,185,129,0.45)}[data-theme="dark"] .badge-aaa{color:#34d399}.badge-aa{background:rgba(59,130,246,0.25);color:#1e40af;border:1px solid rgba(59,130,246,0.45)}[data-theme="dark"] .badge-aa{color:#60a5fa}.badge-large{background:rgba(245,158,11,0.25);color:#92400e;border:1px solid rgba(245,158,11,0.45)}[data-theme="dark"] .badge-large{color:#fbbf24}.badge-fail{background:rgba(239,68,68,0.22);color:#991b1b;border:1px solid rgba(239,68,68,0.4)}[data-theme="dark"] .badge-fail{color:#f87171}.matrix-instructions{font-size:0.85rem;color:var(--text-muted);text-align:center}.export-actions-bar{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;box-shadow:var(--shadow-sm)}.export-heading{font-family:var(--font-heading);font-size:1.05rem;font-weight:700;color:var(--text)}.export-btn-group{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.65);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:2000;display:none;align-items:center;justify-content:center;padding:16px}.modal-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;max-width:620px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 25px 50px -12px rgba(0,0,0,0.35);padding:24px;display:flex;flex-direction:column;gap:18px}.modal-header{display:flex;align-items:center;justify-content:space-between}.modal-title{font-family:var(--font-heading);font-size:1.25rem;font-weight:700;color:var(--text)}.modal-close{background:var(--surface-2);border:1px solid var(--border);color:var(--text);width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.4rem;cursor:pointer;transition:all 0.15s ease;line-height:1}.modal-close:hover{background:var(--border);color:var(--danger)}.modal-body{display:flex;flex-direction:column;gap:18px}.sandbox-metrics-banner{display:flex;align-items:center;justify-content:space-between;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 16px;flex-wrap:wrap;gap:10px}.sandbox-ratio{font-family:monospace;font-weight:800;font-size:1rem;color:var(--text)}.sandbox-status{font-weight:700;font-size:0.8rem;padding:4px 10px;border-radius:6px}.sandbox-stage{border-radius:12px;padding:24px;display:flex;flex-direction:column;gap:14px;border:1px solid var(--border);box-shadow:var(--shadow);transition:background-color 0.25s ease,color 0.25s ease}.sandbox-mock-header{display:flex;align-items:center;justify-content:space-between;gap:10px}.sandbox-mock-header h4{font-size:1.15rem;font-weight:700}.sandbox-badge{font-size:0.72rem;font-weight:700;padding:3px 8px;border-radius:4px;border:1px solid currentColor}.sandbox-mock-body{font-size:0.95rem;line-height:1.6}.sandbox-mock-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:8px}.sandbox-btn{padding:9px 18px;border-radius:8px;font-weight:600;font-size:0.9rem;border:none;cursor:pointer;box-shadow:var(--shadow-sm);transition:transform 0.15s ease}.sandbox-btn:hover{transform:translateY(-1px)}.sandbox-footnote{font-size:0.78rem;opacity:0.75}.autofix-panel{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:18px;display:flex;flex-direction:column;gap:12px}.autofix-title{font-size:0.95rem;font-weight:700;color:var(--text)}.autofix-desc{font-size:0.85rem;color:var(--text-muted);line-height:1.45}.autofix-btn-group{display:flex;gap:10px;flex-wrap:wrap}.autofix-btn{flex:1;min-width:200px}.more-tools-section{padding:50px 0;background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.section-badge{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:0.8rem;font-weight:700;padding:4px 12px;border-radius:999px;text-transform:uppercase;letter-spacing:0.05em;margin-bottom:12px}.section-title-center{font-family:var(--font-heading);font-size:2rem;font-weight:700;color:var(--text);margin-bottom:10px;text-align:center}.section-desc-center{font-size:1.05rem;color:var(--text-muted);max-width:680px;margin:0 auto 36px;text-align:center}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}.tool-box-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;transition:all 0.25s ease;box-shadow:var(--shadow-sm);color:var(--text);text-decoration:none}.tool-box-card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow);color:var(--text)}.tool-box-icon{width:44px;height:44px;border-radius:10px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:14px}.tool-box-title{font-family:var(--font-heading);font-size:1.15rem;font-weight:700;margin-bottom:8px;color:var(--text)}.tool-box-desc{font-size:0.88rem;color:var(--text-muted);line-height:1.5;margin-bottom:16px;flex-grow:1}.tool-box-link{font-size:0.85rem;font-weight:600;color:var(--primary);display:flex;align-items:center;gap:4px}.features-section{padding:60px 0}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:all 0.25s ease}.feature-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow)}.feature-icon{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#06b6d4);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:16px}.feature-title{font-family:var(--font-heading);font-size:1.2rem;font-weight:700;color:var(--text);margin-bottom:8px}.feature-desc{font-size:0.92rem;color:var(--text-muted);line-height:1.55}.how-section{padding:60px 0;background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.step-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:24px;position:relative;text-align:center;box-shadow:var(--shadow-sm)}.step-num{position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;font-weight:700;font-size:0.85rem;display:flex;align-items:center;justify-content:center}.step-title{font-family:var(--font-heading);font-size:1.1rem;font-weight:700;margin:12px 0 8px}.step-desc{font-size:0.88rem;color:var(--text-muted);line-height:1.5}.article-section{padding:60px 0}.article-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:38px;max-width:960px;margin:0 auto}.article-heading{font-family:var(--font-heading);font-size:1.85rem;font-weight:700;color:var(--text);margin:10px 0 20px}.article-wrap p{color:var(--text-muted);font-size:1.02rem;line-height:1.75;margin-bottom:18px}.article-wrap p:last-child{margin-bottom:0}.faq-section{padding:60px 0;background:var(--surface);border-top:1px solid var(--border)}.faq-accordion{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}.faq-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:all 0.2s ease}.faq-question{width:100%;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;background:none;border:none;text-align:left;font-size:1.02rem;font-weight:600;color:var(--text);cursor:pointer}.faq-icon{transition:transform 0.25s ease;color:var(--primary);flex-shrink:0}.faq-item.active .faq-icon{transform:rotate(180deg)}.faq-answer{padding:0 20px 18px;font-size:0.92rem;color:var(--text-muted);line-height:1.65;display:none}.faq-item.active .faq-answer{display:block}.cta-section{padding:65px 0;text-align:center;background:linear-gradient(135deg,rgba(79,70,229,0.08),rgba(6,182,212,0.08))}.cta-wrap{max-width:760px;margin:0 auto}.cta-title{font-family:var(--font-heading);font-size:2.2rem;font-weight:800;color:var(--text);margin-bottom:14px}.cta-desc{font-size:1.05rem;color:var(--text-muted);margin-bottom:28px}.cta-btn-group{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}.footer{background:var(--bg);border-top:1px solid var(--border);padding:60px 0 30px;font-size:0.88rem}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(2,1fr);gap:36px;margin-bottom:40px}.footer-heading{font-family:var(--font-heading);font-size:0.95rem;font-weight:700;color:var(--text);text-transform:uppercase;letter-spacing:0.05em;margin-bottom:16px}.footer-text{font-size:0.88rem;color:var(--text-muted);line-height:1.6;margin-top:14px;max-width:320px}.footer-links{list-style:none;display:flex;flex-direction:column;gap:9px}.footer-links a{color:var(--text-muted);font-size:0.85rem}.footer-links a:hover{color:var(--primary)}.footer-bottom{padding-top:24px;border-top:1px solid var(--border);color:var(--text-muted);font-size:0.84rem;display:flex;flex-direction:column;gap:8px;text-align:center}.disclaimer-text{font-size:0.78rem;color:var(--text-muted);opacity:0.8}.cookie-banner{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);max-width:560px;width:calc(100% - 40px);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow-lg);z-index:9999;display:flex;align-items:center;justify-content:space-between;gap:16px}.cookie-text{font-size:0.84rem;color:var(--text-muted);line-height:1.45}.cookie-text a{text-decoration:underline}.cookie-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.toast{position:fixed;bottom:24px;right:24px;background:var(--text);color:var(--bg);padding:10px 18px;border-radius:var(--radius-sm);font-size:0.88rem;font-weight:500;box-shadow:var(--shadow-lg);z-index:10000;opacity:0;transform:translateY(10px);transition:all 0.25s ease;pointer-events:none}.toast.show{opacity:1;transform:translateY(0)}@media (max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}.steps-grid{grid-template-columns:repeat(2,1fr)}.dropdown-menu{min-width:480px;grid-template-columns:repeat(2,1fr)}}@media (max-width:768px){.nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);padding:20px;flex-direction:column;gap:12px;box-shadow:var(--shadow-lg)}.nav-links.open{display:flex}.dropdown-menu{position:static;transform:none;min-width:100%;box-shadow:none;border:none;padding:10px 0;grid-template-columns:1fr}.mobile-toggle{display:block}.hero-title{font-size:2.1rem}.hero-desc{font-size:1rem}.matrix-app-card{padding:16px 12px;border-radius:12px;gap:16px}.section-box{padding:14px 12px;gap:14px}.section-header-row{flex-direction:column;align-items:flex-start;gap:12px}.preset-group{width:100%;flex-direction:column;align-items:flex-start;gap:6px}.preset-buttons{width:100%;overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px;-webkit-overflow-scrolling:touch}.preset-btn{white-space:nowrap;flex-shrink:0}.chips-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;width:100%}.color-chip-item{padding:6px 8px;gap:6px}.chip-swatch{width:26px;height:26px}.chip-inputs{flex-direction:column;align-items:flex-start;gap:2px;flex-grow:1;min-width:0}.chip-name-input{width:100%;font-size:0.78rem}.chip-hex-input{width:100%;font-size:0.76rem}.palette-actions-bar{flex-direction:column;align-items:stretch;gap:10px}.add-swatch-btn{width:100%}.matrix-ctrl-bar{padding:14px 12px;flex-direction:column;align-items:stretch;gap:14px}.filter-controls{flex-direction:column;align-items:stretch;gap:8px}.filter-btn-group{display:grid;grid-template-columns:1fr 1fr;gap:4px;width:100%}.filter-btn{padding:8px 6px;font-size:0.78rem;text-align:center}.stats-pills{display:grid;grid-template-columns:1fr 1fr;gap:6px;width:100%}.stat-pill{justify-content:space-between;padding:8px 10px}.matrix-wrapper{max-height:500px;padding:4px}.matrix-table{border-spacing:3px}.matrix-th-corner{padding:8px 6px;font-size:0.68rem}.matrix-th-col{min-width:86px;padding:8px 6px;font-size:0.74rem}.matrix-th-row{min-width:96px;padding:8px 8px;font-size:0.74rem}.matrix-cell{min-width:86px;height:60px;padding:6px 4px}.cell-ratio-val{font-size:0.85rem}.cell-badge-pill{font-size:0.6rem;padding:1px 4px}.export-actions-bar{flex-direction:column;align-items:stretch;padding:16px 12px;gap:12px}.export-btn-group{display:flex;flex-direction:column;width:100%;gap:8px}.export-btn-group .btn{width:100%;justify-content:center}.modal-card{padding:16px 14px;max-height:94vh;border-radius:12px}.sandbox-stage{padding:16px 12px}.sandbox-mock-actions{flex-direction:column;align-items:stretch;gap:8px}.sandbox-btn{width:100%}.autofix-btn-group{flex-direction:column;gap:8px}.autofix-btn{width:100%;min-width:0}.features-grid{grid-template-columns:1fr}.steps-grid{grid-template-columns:1fr}.article-wrap{padding:24px 18px}.footer-grid{grid-template-columns:1fr;gap:24px}.cookie-banner{flex-direction:column;align-items:flex-start;bottom:10px;width:calc(100% - 20px)}}@media (max-width:480px){.hero-title{font-size:1.8rem}.hero-desc{font-size:0.92rem}.chips-list{grid-template-columns:1fr}.filter-btn-group{grid-template-columns:1fr}.stats-pills{grid-template-columns:1fr}}