:root{--bg-main:#0f172a;--bg-card:#1e293b;--border-color:#334155;--text-main:#f8fafc;--text-muted:#94a3b8;--primary:#8b5cf6;--hover-bg:#334155;--c-blue:#60a5fa;--c-green:#34d399;--c-purple:#c084fc;--font-mono:'JetBrains Mono', 'Fira Code', 'Courier New', monospace}.dark-theme{font-family:'Inter',system-ui,sans-serif;color:var(--text-main);background:var(--bg-main);padding:1.5rem;border-radius:1rem;min-height:500px}.text-center{text-align:center}.text-3xl{font-size:1.875rem}.font-bold{font-weight:700}.font-mono{font-family:var(--font-mono)}.text-muted{color:var(--text-muted)}.text-blue{color:var(--c-blue)}.text-green{color:var(--c-green)}.text-purple{color:var(--c-purple)}.mt-4{margin-top:1rem}.mt-6{margin-top:1.5rem}.mt-8{margin-top:2rem}.w-full{width:100%}.app-layout{display:flex;flex-direction:column;gap:1.5rem}@media (min-width:992px){.app-layout{flex-direction:row;align-items:flex-start}.settings-col{flex:1;position:sticky;top:1.5rem}.converter-col{flex:2}}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:1rem;padding:1.5rem;box-shadow:0 4px 6px -1px rgb(0 0 0 / .2)}.card-title{margin:0;font-size:1.1rem;font-weight:600;color:#fff;display:flex;align-items:center;gap:.5rem}.card-title i{width:18px;height:18px;color:var(--primary)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.card-header label{font-weight:600;font-size:.95rem;color:var(--text-muted);display:flex;align-items:center;gap:.5rem}.card-header i{width:16px;height:16px}.badge{background:var(--primary);color:#fff;padding:.25rem .75rem;border-radius:1rem;font-size:.75rem;font-weight:700;letter-spacing:1px}.form-group{margin-bottom:1rem}.form-group label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:.5rem}.form-control{width:100%;background:var(--bg-main);border:1px solid var(--border-color);color:#fff;padding:.75rem 1rem;border-radius:.5rem;font-size:1rem;outline:none;transition:all 0.2s;resize:vertical}.form-control:focus{border-color:var(--primary)}.form-control[readonly]{background:rgb(15 23 42 / .5);cursor:text}.large-input{font-size:1.25rem;font-family:var(--font-mono)}.highlight-border{border:2px solid var(--primary);box-shadow:0 0 15px rgb(139 92 246 / .2)}.out-area{min-height:60px;line-height:1.5;word-break:break-all}.checkbox-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;font-size:.9rem;color:white!important}.checkbox-label input{width:16px;height:16px;accent-color:var(--primary)}.btn{padding:.75rem 1rem;border-radius:.5rem;font-weight:600;cursor:pointer;border:none;transition:all 0.2s}.btn-outline{background:#fff0;border:1px solid var(--border-color);color:var(--text-main)}.btn-outline:hover{background:var(--hover-bg);border-color:var(--primary);color:var(--primary)}.btn-copy{background:#fff0;border:none;color:var(--text-muted);cursor:pointer;padding:.25rem;transition:color 0.2s}.btn-copy:hover{color:#fff}.results-grid{display:grid;grid-template-columns:1fr;gap:1rem}.error-msg{color:#ef4444;font-size:.85rem;margin-top:.5rem;font-weight:600}.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--primary);color:#fff;padding:.75rem 1.5rem;border-radius:2rem;font-weight:600;opacity:0;transition:all 0.3s cubic-bezier(.68,-.55,.265,1.55);z-index:1000}.toast.show{transform:translateX(-50%) translateY(0);opacity:1}