*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color:#2563eb;--primary-hover:#1d4ed8;--secondary-color:#64748b;--success-color:#10b981;--danger-color:#ef4444;--background:#ffffff;--surface:#f8fafc;--text-primary:#1e293b;--text-secondary:#64748b;--border-color:#e2e8f0;--shadow:0 1px 3px 0 rgba(0,0,0,0.1),0 1px 2px 0 rgba(0,0,0,0.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -2px rgba(0,0,0,0.05);--header-bg:#FBF9F6;--body-gradient-start:#C8E2ED;--body-gradient-end:#E0ECE0;--card-bg:#FBF9F6;--hero-text:#0d0c47;--logo-text:#0d0c47}[data-theme="dark"]{--primary-color:#60a5fa;--primary-hover:#3b82f6;--secondary-color:#94a3b8;--success-color:#34d399;--danger-color:#f87171;--background:#1e293b;--surface:#334155;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--border-color:#475569;--shadow:0 1px 3px 0 rgba(0,0,0,0.3),0 1px 2px 0 rgba(0,0,0,0.2);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.3),0 4px 6px -2px rgba(0,0,0,0.2);--header-bg:#1e293b;--body-gradient-start:#090915;--body-gradient-end:#1e293b;--card-bg:#334155;--hero-text:#f1f5f9;--logo-text:#f1f5f9}body{font-family:'Varela Round',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;line-height:1.6;color:var(--text-primary);background:linear-gradient(to top,var(--body-gradient-start),var(--body-gradient-end));min-height:100vh;display:flex;flex-direction:column;transition:background 0.3s ease,color 0.3s ease}.container{max-width:1200px;margin:0 auto;padding:0 1rem;width:100%}.container-medium{max-width:1000px;margin:0 auto;padding:0 1rem;width:100%}.container-narrow{max-width:800px;margin:0 auto;padding:0 1rem;width:100%}.container-extra-narrow{max-width:600px;margin:0 auto;padding:0 1rem;width:100%}.gap-xs{gap:0.5rem}.gap-sm{gap:0.75rem}.gap-md{gap:1rem}.gap-lg{gap:1.5rem}.gap-xl{gap:2rem}.list-indent{padding-left:1.5rem}ul.list-indent,ol.list-indent{margin-left:1.5rem;padding-left:0}header{background:var(--header-bg);box-shadow:var(--shadow);position:sticky;top:0;z-index:1000;transition:background 0.3s ease}.navbar{padding:1rem 0}.navbar .container{display:flex;justify-content:space-between;align-items:center;position:relative;flex-wrap:wrap}.logo{display:flex;align-items:center;gap:0.75rem;font-size:1.5rem;font-weight:700;color:var(--primary-color);text-decoration:none;transition:opacity 0.2s}.logo:hover{opacity:0.8}.logo-img{height:34px;width:auto;max-width:80px;object-fit:contain;display:inline-block}.logo .logo-text,.logo-text{display:inline-block;font-family:'Varela Round',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-weight:700!important;letter-spacing:-0.5px;font-size:1.75rem!important;color:var(--logo-text)!important;transition:color 0.3s ease}.logo-img[style*="display: none"] + .logo-text{display:inline-block}.navbar{position:relative}.nav-menu{position:absolute;top:100%;right:0;flex-direction:column;background-color:var(--header-bg);width:250px;text-align:left;transition:opacity 0.3s,visibility 0.3s,transform 0.3s,background-color 0.3s;box-shadow:var(--shadow-lg);padding:0.5rem 0;gap:0;z-index:1000;list-style:none;margin:0;opacity:0;visibility:hidden;transform:translateY(-10px);border-radius:8px;overflow:hidden}.nav-menu.active{opacity:1;visibility:visible;transform:translateY(0)}.nav-menu li{border-bottom:1px solid var(--border-color)}.nav-menu li:last-child{border-bottom:none}.nav-menu a{display:block;padding:1rem 2rem;color:var(--text-primary);text-decoration:none;font-weight:500;transition:background-color 0.2s,color 0.2s}.nav-menu a:hover{background-color:var(--surface);color:var(--primary-color)}.mobile-menu-toggle{display:flex;flex-direction:column;background:none;border:none;cursor:pointer;padding:0.5rem;gap:5px;z-index:1001}.mobile-menu-toggle span{width:28px;height:3px;background:var(--text-primary);border-radius:2px;transition:all 0.3s ease;display:block}.mobile-menu-toggle:hover span{background:var(--primary-color)}.main-content{flex:1;padding:2rem 0 7rem 0}.card{background:var(--background);border-radius:8px;padding:2rem;box-shadow:var(--shadow);margin-bottom:2rem}.card-title{font-size:1.5rem;font-weight:600;margin-bottom:1rem;color:var(--text-primary)}.form-group{margin-bottom:1.5rem}.form-label{display:block;margin-bottom:0.5rem;font-weight:500;color:var(--text-primary)}.form-control{width:100%;padding:0.75rem;border:1px solid var(--border-color);border-radius:6px;font-size:1rem;transition:border-color 0.2s,box-shadow 0.2s;background-color:var(--background);color:var(--text-primary)}[data-theme="dark"] .form-control{background-color:var(--card-bg);color:var(--text-primary)}.form-control::placeholder{color:var(--text-secondary);opacity:1}[data-theme="dark"] .form-control::placeholder{color:var(--text-secondary);opacity:0.8}.form-control:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(37,99,235,0.1)}[data-theme="dark"] .form-control:focus{box-shadow:0 0 0 3px rgba(96,165,250,0.2)}.form-select{width:100%;padding:0.75rem;border:1px solid var(--border-color);border-radius:6px;font-size:1rem;background-color:var(--background);color:var(--text-primary);cursor:pointer}[data-theme="dark"] .form-select{background-color:var(--card-bg);color:var(--text-primary)}.form-select option{background-color:var(--background);color:var(--text-primary)}[data-theme="dark"] .form-select option{background-color:var(--card-bg);color:var(--text-primary)}.form-select option[value=""]{color:var(--text-secondary)}.btn{display:inline-block;padding:0.75rem 1.5rem;border:none;border-radius:6px;font-size:1rem;font-weight:500;cursor:pointer;transition:all 0.2s;text-decoration:none;text-align:center}.btn-primary{background-color:var(--primary-color);color:white}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:var(--secondary-color);color:white}.btn-secondary:hover{background-color:#475569}.btn-block{display:block;width:100%}.grid{display:grid;gap:2rem;position:relative}.grid-2,.grid-3,.grid-4{padding-bottom:7rem}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.grid-3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.grid-4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.converter-tool{background:var(--surface);border-radius:8px;padding:1.5rem;margin-bottom:1.5rem}.converter-result{margin-top:1rem;padding:1rem;background:var(--background);border-radius:6px;border:1px solid var(--border-color)}.alert{padding:1rem;border-radius:6px;margin-bottom:1rem;transition:background-color 0.3s ease,color 0.3s ease,border-color 0.3s ease}.alert-success{background-color:#d1fae5;color:#065f46;border:1px solid #10b981}[data-theme="dark"] .alert-success{background-color:#064e3b;color:#d1fae5;border-color:#34d399}.alert-error{background-color:#fee2e2;color:#991b1b;border:1px solid #ef4444}[data-theme="dark"] .alert-error{background-color:#7f1d1d;color:#fee2e2;border-color:#f87171}.alert-info{background-color:#dbeafe;color:#1e40af;border:1px solid #3b82f6}[data-theme="dark"] .alert-info{background-color:#1e3a8a;color:#dbeafe;border-color:#60a5fa}footer{background:var(--surface);padding:2rem 0;margin-top:4rem;text-align:center;color:var(--text-secondary)}footer p{margin:0.5rem 0}.hero{text-align:center;padding:3rem 0;margin-bottom:3rem}.hero h1{font-size:2.5rem;margin-bottom:1rem;font-family:'Varela Round',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-weight:700;color:var(--hero-text);transition:color 0.3s ease}.hero p{font-size:1.25rem;color:var(--text-secondary);margin-bottom:2rem}.tool-categories{margin-top:3rem;padding-bottom:5rem;max-width:1000px;margin-left:auto;margin-right:auto}.category-card{background:var(--card-bg);border-radius:8px;padding:2rem;box-shadow:var(--shadow);text-align:center;transition:transform 0.2s,box-shadow 0.2s,background 0.3s ease;text-decoration:none;color:inherit;display:block}.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.category-card .category-icon{margin-bottom:1rem;display:flex;justify-content:center;align-items:center}.category-card .category-icon img{width:3rem;height:3rem;object-fit:contain;transition:filter 0.3s ease}[data-theme="dark"] .category-card .category-icon img{filter:brightness(1.5)}.category-card h3{color:var(--hero-text);margin-bottom:1rem;transition:color 0.3s ease}.category-card p{color:var(--text-secondary)}.file-upload-area{border:2px dashed var(--border-color);border-radius:8px;padding:3rem;text-align:center;cursor:pointer;transition:all 0.2s;background:var(--surface)}.file-upload-area input[type="file"]{display:none}.file-upload-area:hover{border-color:var(--primary-color);background:var(--surface)}.file-upload-area.dragover{border-color:var(--primary-color);background:var(--surface)}@media (max-width:768px){.nav-menu{width:100%;right:0;left:0;border-radius:0}}@media (max-width:768px){.logo-img{height:28px;max-width:80px}.logo{font-size:1.25rem}.hero h1{font-size:2rem;font-family:'Varela Round',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-weight:700;color:var(--hero-text)}.hero p{font-size:1rem}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.card{padding:1.5rem}}@media (max-width:480px){.container,.container-medium,.container-narrow,.container-extra-narrow,.tool-categories{padding:0 0.75rem}.hero{padding:2rem 0}.hero h1{font-size:1.75rem;font-family:'Varela Round',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-weight:700;color:var(--hero-text)}}.feedback-section{margin-top:4rem;padding-top:2rem;border-top:1px solid var(--border-color)}.feedback-form{max-width:600px;margin:0 auto;display:flex;flex-direction:column;gap:0.75rem}.feedback-form textarea{width:100%;padding:0.75rem;border:1px solid var(--border-color);border-radius:4px;font-size:0.9rem;font-family:inherit;resize:vertical;min-height:80px;background-color:var(--background);color:var(--text-primary)}[data-theme="dark"] .feedback-form textarea{background-color:var(--card-bg);color:var(--text-primary)}.feedback-form textarea:focus{outline:none;border-color:var(--primary-color)}.feedback-footer{display:flex;flex-direction:row;justify-content:space-between;align-items:center;width:100%}.char-count{font-size:0.85rem;color:var(--text-secondary);flex-shrink:0}.feedback-form .feedback-footer button{padding:1rem 2rem;background:var(--card-bg);color:var(--text-primary);border:none;border-radius:8px;font-size:0.9rem;font-weight:500;cursor:pointer;box-shadow:var(--shadow);transition:transform 0.2s,box-shadow 0.2s,background 0.3s ease;margin-left:auto;flex-shrink:0}.feedback-form button:hover{background:var(--card-bg);transform:translateY(-4px);box-shadow:var(--shadow-lg)}@media (max-width:768px){.feedback-form{max-width:100%}}.dark-mode-toggle{display:flex;align-items:center;gap:0.5rem;background:none;border:1px solid var(--border-color);border-radius:6px;padding:0.5rem 0.75rem;cursor:pointer;transition:all 0.2s;color:var(--text-primary);font-size:0.9rem;margin-left:1rem}.dark-mode-toggle:hover{background:var(--surface);border-color:var(--primary-color)}.dark-mode-toggle svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.dark-mode-toggle .moon-icon{display:none}[data-theme="dark"] .dark-mode-toggle .sun-icon{display:none}[data-theme="dark"] .dark-mode-toggle .moon-icon{display:block}@media (max-width:768px){.dark-mode-toggle{margin-left:0.5rem;padding:0.4rem 0.6rem;font-size:0.85rem}.dark-mode-toggle span{display:none}.tool-categories{padding-bottom:6rem}.grid-2,.grid-3,.grid-4{padding-bottom:8rem}}@media (max-width:1024px){.tool-categories{padding-bottom:6rem}}@media (max-width:768px){.tool-categories{padding-bottom:6rem}#kofi-widget-container,iframe[src*="ko-fi.com"],iframe[id*="kofi"],div[id*="kofi"],div[class*="kofi"],[data-kofi]{bottom:20px!important;right:20px!important;left:auto!important}}.tip-us-link{position:fixed;bottom:20px;left:20px;z-index:9999;display:inline-flex;align-items:center;gap:0.4rem;padding:0.5rem 1rem;background:#9AA4B4;color:#0D0B47;text-decoration:none;font-weight:600;font-size:0.95rem;border-radius:9999px;box-shadow:0 2px 8px rgba(0,0,0,0.15);transition:transform 0.2s ease,box-shadow 0.2s ease}.tip-us-link:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,0.2);color:#0D0B47}.tip-us-icon{font-size:1.1rem;line-height:1}@media (max-width:768px){.tip-us-link{bottom:20px;left:20px}}[data-theme="dark"] .tip-us-link,:root:not([data-theme="light"]) .tip-us-link{background:#6B7280;color:#F3F4F6}[data-theme="dark"] .tip-us-link:hover,:root:not([data-theme="light"]) .tip-us-link:hover{color:#F3F4F6}