body {
    background-color: #f9fafb;
    color: #111827;
    font-family: -apple-system, sans-serif;
    margin: 0;
    padding-bottom: 48px;
}
header {
    background: white;
    border-bottom: 1px solid #e5e7eb;
    padding: 16px;
    text-align: center;
}
.max-w {
    max-width: 440px;
    margin: 0 auto;
    padding: 0 12px;
    box-sizing: border-box;
}
.card {
    background: white;
    padding: 20px;
    border-radius: 16px;
    border: 1px solid #f3f4f6;
    margin-top: 24px;
    box-sizing: border-box;
}
h2 {
    font-size: 12px;
    font-weight: 600;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid #f3f4f6;
    padding-bottom: 8px;
    margin: 0 0 16px 0;
}
.logo-text {
    font-size: 24px;
    font-weight: 800;
    color: #1f2937;
}
.logo-x {
    color: #ef4444;
    font-weight: 900;
}
.logo-sub {
    font-size: 14px;
    font-weight: 500;
    color: #6b7280;
    margin: 0;
}
.field-group {
    display: flex;
    flex-direction: column-reverse;
    margin-bottom: 16px;
    position: relative;
}
.field-group input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    font-size: 16px;
    border-radius: 12px;
    border: 1px solid #d1d5db;
    outline: none;
}
.field-group label {
    font-size: 13px;
    font-weight: 500;
    color: #4b5563;
    margin-bottom: 4px;
}
.grid-3 {
    display: flex;
    gap: 12px;
}
.grid-3 .field-group:nth-child(1) {
    flex: 2;
}
.grid-3 .field-group:nth-child(2) {
    flex: 1;
}
.grid-plz {
    display: flex;
    gap: 12px;
}
.grid-plz .field-group:nth-child(1) {
    flex: 1;
}
.grid-plz .field-group:nth-child(2) {
    flex: 2;
}
.dropdown-menu {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: white;
    border: 1px solid #d1d5db;
    border-radius: 12px;
    max-height: 150px;
    overflow-y: auto;
    z-index: 50;
    display: none;
}
.dropdown-item {
    padding: 12px 14px;
    font-size: 15px;
    cursor: pointer;
    border-bottom: 1px solid #f3f4f6;
    text-align: left;
}
.dropdown-item:hover {
    background-color: #f3f4f6;
}
.boxes-group {
    margin-bottom: 20px;
    width: 100%;
}
.boxes-label {
    font-size: 13px;
    font-weight: 500;
    color: #4b5563;
    margin-bottom: 6px;
    text-align: left;
}
.boxes-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    width: 100%;
    box-sizing: border-box;
}
.box-input {
    width: 22px;
    height: 38px;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    outline: none;
    padding: 0;
    box-sizing: border-box;
    flex-shrink: 0;
}
.box-readonly {
    background-color: #e5e7eb;
    color: #4b5563;
}
.box-dot {
    font-weight: bold;
    color: #9ca3af;
    font-size: 14px;
    width: 4px;
    text-align: center;
    flex-shrink: 0;
}
button {
    width: 100%;
    background: #2563eb;
    color: white;
    border: none;
    font-weight: bold;
    font-size: 18px;
    padding: 16px;
    border-radius: 16px;
    margin-top: 24px;
    cursor: pointer;
}
.hidden {
    display: none !important;
}
#success-screen {
    text-align: center;
    margin-top: 80px;
}
.success-card {
    background: white;
    padding: 32px;
    border-radius: 24px;
    border: 1px solid #f3f4f6;
    box-shadow: 0 10px 15px rgba(0,0,0,0.05);
}