:root{--container-bg:#ffffffdd;--text-color:#1e293b;--button-bg:#3b82f6;--button-hover:#2563eb;--results-bg:#eff6ff;--watermark-color:#64748b;--fact-bg:#f8fafc;--fact-border:#60a5fa}.dark-mode{--container-bg:#1e293b;--text-color:#f8fafc;--button-bg:#3b82f6;--button-hover:#60a5fa;--results-bg:#334155;--watermark-color:#94a3b8;--fact-bg:#1e293b;--fact-border:#3b82f6}
body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:#02001a url('https://www.sleeptimepro.com/img/bg.png')repeat;color:var(--text-color);margin:0;padding:0;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;transition:background 0.3s ease,color 0.3s ease}.container{display:flex;flex-direction:row;flex-wrap:wrap;max-width:1200px;margin:0 auto;padding:2rem;gap:2rem}.left,.right{flex:1;min-width:300px;background:white;padding:2rem;background:var(--container-bg);border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,0.1)}
h1,h2{color:var(--heading-color)}.section{margin:2rem 0}
label{display:block;margin-bottom:0.5rem;font-weight:bold}
input[type="time"],button{padding:0.75rem 1rem;font-size:1rem;border:1px solid #cbd5e1;border-radius:8px;width:100%;box-sizing:border-box}
input[type="time"]{overflow-y:scroll}
button{background-color:var(--button-bg);color:white;font-weight:600;margin-top:1rem;cursor:pointer;transition:background-color 0.3s ease}
button:hover{background-color:var(--button-hover)}.results{background-color:var(--results-bg);border-left:5px solid var(--button-bg);padding:1rem;border-radius:8px;margin-top:1rem;font-size:1.1rem}.watermark{font-size:0.85rem;color:var(--watermark-color);text-align:right;margin-top:0.5rem}.facts{margin-top:2rem;font-size:0.95rem;color:var(--text-color);background-color:var(--fact-bg);border-left:4px solid var(--fact-border);padding:0.75rem 1rem;border-radius:8px}.toggle-container{display:flex;gap:2rem;justify-content:center;margin-bottom:-1rem;width:100%}.toggle-container button{font-size:0.9rem;padding:0.5rem 1rem}
input[type="time"]::-webkit-calendar-picker-indicator{cursor:pointer}.flag-icon{width:24px;height:16px;vertical-align:middle}.row{width:100%}.centered-title{text-align:center;color:#e2e8f0}.footer,.footer a{color:#e2e8f0}
@media(max-width:768px){.container{flex-direction:column}.left,.right{flex:0;min-width:auto;background:white;padding:1rem;background:var(--container-bg);border-radius:5px;box-shadow:0 2px 10px rgba(0,0,0,0.1)}.toggle-container{gap:1rem}}