* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", system-ui, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: radial-gradient(circle at 20% 20%, #1e1b4b, #0f0a2a 60%, #0a061f);
}

.container {
    width: 100%;
    max-width: 520px;
}

.panel {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 2.2rem;
    backdrop-filter: blur(14px);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

.panel h1 {
    color: #fff;
    font-size: 1.7rem;
    margin-bottom: 0.4rem;
}

.subtitle {
    color: #9aa0c4;
    font-size: 0.92rem;
    margin-bottom: 1.8rem;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.option {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 16px;
    padding: 1rem 1.2rem;
    cursor: pointer;
    transition: border-color 0.3s ease, background 0.3s ease, transform 0.2s ease;
}

.option:hover {
    border-color: rgba(139, 92, 246, 0.6);
    background: rgba(139, 92, 246, 0.08);
}

.option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.check {
    position: relative;
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 2px solid #5c6180;
    background: transparent;
    transition: all 0.3s ease;
}

.check::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, #4ade80, #22d3ee);
    transform: scale(0);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.check::before {
    content: "";
    position: absolute;
    top: 7px;
    left: 5px;
    width: 12px;
    height: 6px;
    border-left: 2.5px solid #fff;
    border-bottom: 2.5px solid #fff;
    transform: rotate(-45deg) scale(0);
    transition: transform 0.25s ease 0.12s;
    z-index: 1;
}

.option input:checked + .check {
    border-color: transparent;
    box-shadow: 0 0 18px rgba(74, 222, 128, 0.5);
}

.option input:checked + .check::after {
    transform: scale(1);
}

.option input:checked + .check::before {
    transform: rotate(-45deg) scale(1);
}

.option input:focus-visible + .check {
    outline: 3px solid rgba(139, 92, 246, 0.6);
    outline-offset: 2px;
}

.option-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.option-title {
    color: #fff;
    font-weight: 600;
    font-size: 0.98rem;
}

.option-desc {
    color: #8f95b8;
    font-size: 0.83rem;
    margin-top: 2px;
}

.price {
    color: #4ade80;
    font-weight: 700;
    font-size: 0.9rem;
}

.result {
    margin-top: 1.6rem;
    text-align: center;
    color: #c3c8e8;
    font-size: 0.9rem;
    padding: 0.7rem;
    border-radius: 12px;
    background: rgba(139, 92, 246, 0.12);
    border: 1px dashed rgba(139, 92, 246, 0.5);
    transition: opacity 0.3s ease;
}