:root{--bg-color: #0f172a;--card-bg: #1e293b;--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent-color: #38bdf8;--accent-hover: #0ea5e9;--border-color: #334155;--input-bg: #0f172a;--font-family: "Inter", system-ui, -apple-system, sans-serif}body{margin:0;font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-primary);min-height:100vh;display:flex;justify-content:center;align-items:center}*{box-sizing:border-box}h1,h2,h3{margin:0;font-weight:600}button{cursor:pointer;font-family:inherit}input,textarea{font-family:inherit}.form-container{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-label{font-size:.875rem;font-weight:500;color:var(--text-secondary)}.form-input,.form-textarea{padding:.75rem 1rem;border-radius:.5rem;border:1px solid var(--border-color);background-color:var(--input-bg);color:var(--text-primary);font-size:1rem;transition:border-color .2s,box-shadow .2s}.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 3px #38bdf833}.form-textarea{resize:vertical;min-height:100px}.date-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media(max-width:600px){.date-row{grid-template-columns:1fr}}input[type=datetime-local]::-webkit-calendar-picker-indicator{filter:invert(1);cursor:pointer}.result-container{background-color:#1e293b80;border:1px solid var(--border-color);border-radius:.75rem;padding:1.5rem;margin-top:2rem;display:flex;flex-direction:column;gap:1rem}.result-header{display:flex;justify-content:space-between;align-items:center}.result-title{font-size:1rem;font-weight:600;color:var(--text-primary)}.url-box{background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:.5rem;padding:.75rem;font-family:monospace;font-size:.875rem;color:var(--text-secondary);word-break:break-all;max-height:100px;overflow-y:auto}.actions{display:flex;gap:1rem}.btn{padding:.75rem 1.5rem;border-radius:.5rem;border:none;font-weight:600;font-size:.875rem;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:.5rem}.btn-primary{background-color:var(--accent-color);color:#0f172a}.btn-primary:hover{background-color:var(--accent-hover);transform:translateY(-1px)}.btn-secondary{background-color:transparent;border:1px solid var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background-color:#ffffff0d;border-color:var(--text-secondary)}.copy-feedback{color:#4ade80;font-size:.875rem;animation:fadeIn .2s ease-in-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.app-container{width:100%;max-width:1000px;margin:2rem auto;padding:2rem;background-color:var(--card-bg);border-radius:1rem;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f;border:1px solid var(--border-color)}.app-header{margin-bottom:2rem;text-align:center}.app-title{font-size:2rem;background:linear-gradient(135deg,#38bdf8,#818cf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem}.app-subtitle{color:var(--text-secondary);font-size:1rem}.main-content{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}.preview-section{position:sticky;top:2rem}@media(max-width:900px){.main-content{grid-template-columns:1fr;gap:2rem}.preview-section{position:static}}