:root{--color-primary:#5dcdf1;--color-primary-hover:#4ac0e8;--color-coral:#fd976d;--color-coral-hover:#fc8555;--color-yellow:#fdd46b;--color-purple:#c9b1fb;--color-green:#79d287;--color-error:#c53030;--color-error-bg:#fef0ee;--color-error-border:#fdd;--color-success:#276749;--color-success-bg:#eefcf0;--color-success-border:#c6f6d5;--color-foreground:#1b1624;--color-foreground-muted:#5c5470;--color-foreground-subtle:#8e8a9a;--color-background:#f9f6f3;--color-surface:#fff;--color-border:#e8e3dd;--color-border-light:#f0ebe6;--color-warm-bg:#fefbf7;--color-warm-gradient:linear-gradient(135deg, #fefbf7 0%, #f9f6f3 100%);--color-green-gradient:linear-gradient(135deg, #eefcf0 0%, #f0fdf4 100%);--font-heading:-apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-body:-apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-mono:"SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-pill:9999px;--shadow-sm:0 1px 2px #1b16240a;--shadow-md:0 4px 12px #1b16240f;--shadow-lg:0 8px 24px #1b162414;--shadow-hover:0 12px 32px #1b16241a;--transition:.2s ease-in-out}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--color-background);color:var(--color-foreground);font-size:15px;font-weight:400;line-height:1.6}.app{flex-direction:column;min-height:100vh;display:flex}.navbar{border-bottom:1px solid var(--color-border);z-index:100;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffeb;position:sticky;top:0}.nav-container{justify-content:space-between;align-items:center;max-width:1100px;height:64px;margin:0 auto;padding:0 2rem;display:flex}.nav-brand{font-family:var(--font-heading);color:var(--color-foreground);letter-spacing:-.01em;transition:color var(--transition);font-size:1.15rem;font-weight:600;text-decoration:none}.nav-brand:hover{color:var(--color-coral)}.nav-links{align-items:center;gap:.375rem;display:flex}.footer{border-top:1px solid var(--color-border);background:var(--color-surface);margin-top:auto;padding:1.25rem 2rem}.footer-container{max-width:1100px;color:var(--color-foreground-subtle);justify-content:center;align-items:center;gap:.625rem;margin:0 auto;font-size:.85rem;display:flex}.footer-link{color:var(--color-foreground-muted);transition:color var(--transition);font-weight:500;text-decoration:none}.footer-link:hover{color:var(--color-coral)}.footer-separator{color:var(--color-border)}.layout{flex:1;width:100%;max-width:1100px;margin:0 auto;display:flex}.sidebar{border-right:1px solid var(--color-border);background:var(--color-surface);width:220px;min-width:220px;padding:1.25rem 0;overflow-y:auto}.sidebar-section{margin-bottom:1.5rem;padding:0 .75rem}.sidebar-heading{text-transform:uppercase;letter-spacing:.06em;color:var(--color-foreground-subtle);margin-bottom:.375rem;padding:0 .75rem;font-size:.6875rem;font-weight:600}.sidebar-link{color:var(--color-foreground-muted);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);padding:.4rem .75rem;font-size:.85rem;font-weight:500;text-decoration:none;display:block}.sidebar-link:hover{color:var(--color-foreground);background-color:var(--color-border-light)}.sidebar-link.active{color:var(--color-foreground);background-color:var(--color-yellow);font-weight:600}.content{flex:1;min-width:0;padding:2.5rem 2rem}.tool-header{margin-bottom:1.5rem}.tool-header h1{font-family:var(--font-heading);color:var(--color-foreground);margin-bottom:.25rem;font-size:1.375rem;font-weight:600}.tool-header p{color:var(--color-foreground-muted);font-size:.9rem}.tool-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:1.5rem}textarea.tool-input,input.tool-input{border:1.5px solid var(--color-border);border-radius:var(--radius-md);width:100%;font-family:var(--font-mono);color:var(--color-foreground);background:var(--color-surface);resize:vertical;transition:all var(--transition);padding:.75rem 1rem;font-size:.85rem;font-weight:500;line-height:1.5}textarea.tool-input:focus,input.tool-input:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 3px #5dcdf126}textarea.tool-input::placeholder,input.tool-input::placeholder{color:var(--color-foreground-subtle);font-weight:400}.tool-label{text-transform:uppercase;letter-spacing:.06em;color:var(--color-foreground-muted);margin-bottom:.375rem;font-size:.75rem;font-weight:600;display:block}.tool-output{background:var(--color-warm-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);font-family:var(--font-mono);color:var(--color-foreground);white-space:pre-wrap;word-break:break-all;min-height:80px;padding:.75rem 1rem;font-size:.85rem;line-height:1.5}.tool-actions{gap:.5rem;margin-top:1rem;display:flex}.tool-btn{border-radius:var(--radius-pill);font-weight:600;font-family:var(--font-body);cursor:pointer;transition:all var(--transition);background:var(--color-surface);color:var(--color-foreground-muted);border:none;border:1.5px solid var(--color-border);padding:.5rem 1.25rem;font-size:.85rem}.tool-btn:hover:not(:disabled){color:var(--color-foreground);background:var(--color-border-light);border-color:var(--color-border)}.tool-btn:disabled{opacity:.5;cursor:not-allowed}.tool-btn-primary{background:var(--color-primary);color:#fff;border-color:var(--color-primary);box-shadow:0 2px 8px #5dcdf14d}.tool-btn-primary:hover:not(:disabled){background:var(--color-primary-hover);border-color:var(--color-primary-hover);color:#fff;box-shadow:0 4px 16px #5dcdf166}.tool-row{flex-direction:column;gap:0;display:flex}.tool-row+.tool-row{margin-top:1rem}.tools-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem;display:grid}.tool-grid-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition);color:inherit;box-shadow:var(--shadow-sm);padding:1.5rem;text-decoration:none}.tool-grid-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}.tool-grid-card h3{font-family:var(--font-heading);color:var(--color-foreground);margin-bottom:.375rem;font-size:.95rem;font-weight:600}.tool-grid-card p{color:var(--color-foreground-muted);font-size:.85rem}.sidebar-toggle{color:var(--color-foreground-muted);cursor:pointer;transition:color var(--transition);background:0 0;border:none;padding:.25rem;font-size:1.25rem;display:none}.sidebar-toggle:hover{color:var(--color-foreground)}@media (width<=768px){.nav-container{flex-direction:column;gap:.5rem;height:auto;padding:.875rem 1.25rem}.layout{flex-direction:column}.sidebar{border-right:none;border-bottom:1px solid var(--color-border);width:100%;min-width:100%;padding:.5rem 0}.sidebar.collapsed{display:none}.sidebar-toggle{display:block}.sidebar-section{flex-wrap:wrap;gap:.25rem;padding:0 .5rem;display:flex}.sidebar-heading{width:100%}.content{padding:1.5rem 1.25rem}}