body { 
    background-color: #FFF1F2; 
    margin: 0; 
    overflow-y: auto;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.btn-option { transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); }
.btn-option:active { transform: scale(0.98); }

.bg-immediate-red {
    background-color: #be123c; 
    background-image: linear-gradient(135deg, #f43f5e 0%, #be123c 100%);
}

.letter-paper {
    background-color: #FFFCF5;
    background-image: radial-gradient(#E5E7EB 1px, transparent 0);
    background-size: 20px 20px;
    box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
}

.signature-input {
    background: transparent;
    border: none;
    border-bottom: 2px dashed #9CA3AF;
    width: 100%;
    font-family: 'Dancing Script', cursive;
    font-size: 1.5rem;
    color: #1F2937;
    padding: 4px 0;
    outline: none;
    transition: border-color 0.3s;
}
.signature-input:focus { border-color: #E11D48; }

.glass-panel {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
}

.custom-checkbox {
    appearance: none;
    background-color: transparent;
    margin: 0;
    font: inherit;
    color: currentColor;
    width: 20px;
    height: 20px;
    border: 2px solid #D1D5DB;
    border-radius: 6px;
    display: grid;
    place-content: center;
    cursor: pointer;
    transition: all 0.2s;
}
.custom-checkbox::before {
    content: "";
    width: 12px;
    height: 12px;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    box-shadow: inset 1em 1em white;
    background-color: white;
    transform-origin: center;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}
.custom-checkbox:checked {
    background-color: #E11D48;
    border-color: #E11D48;
}
.custom-checkbox:checked::before {
    transform: scale(1);
}

.scrollbar-hide::-webkit-scrollbar {
    display: none;
}
.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 3px; }

input[type="date"], input[type="time"] {
    -webkit-appearance: none;
    display: block;
    font-family: inherit;
}