:root {
    --background: #ffffff;
    --text: #000000;
    --muted: #666666;
    --card: #fafafa;
    --border: #eaeaea;
    --btn: #f2f2f2;
    --accent: #000000;
    --accent-text: #ffffff;
}

html:has(#dark-mode-toggle:checked) {
    --background: #000000;
    --text: #ededed;
    --muted: #888888;
    --card: #0a0a0a;
    --border: #333333;
    --btn: #171717;
    --accent: #ededed;
    --accent-text: #000000;
}

* { 
    box-sizing: border-box; 
    margin: 0;
    padding: 0;
}
[hidden] { 
    display: none; 
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin: 0;
    min-height: 100vh;
    padding: 2rem 1.25rem;
    background: var(--background);
    color: var(--text);
    font-family: "Roboto", sans-serif;
}

h1 { 
    margin: 0; 
    font-size: 1.5rem; 
}

.app-header, .app { 
    width: min(900px, 100%); 
}

.app-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    gap: 1rem;
}

.dark-mode-input { 
    position: absolute; 
    opacity: 0; 
    width: auto;
}

.dark-mode-toggle { 
    display: flex; 
    align-items: center; 
    gap: 0.6rem; 
    color: var(--muted); 
    cursor: pointer; 
}

.dark-mode-switch { 
    width: 2.75rem; 
    height: 1.5rem; 
    padding: 0.15rem; 
    border: 1px solid var(--border); 
    border-radius: 999px; 
    background: var(--btn);
}

.dark-mode-thumb { 
    display: block; 
    width: 1.15rem; 
    height: 1.15rem; 
    border-radius: 50%; 
    background: var(--text); 
}

.dark-mode-input:checked + label .dark-mode-thumb { 
    margin-left: auto; 
}

.dark-mode-input:focus-visible + label { 
    outline: 2px solid var(--accent);
}

form { 
    display: flex; 
    flex-direction: column; 
    gap: 1.5rem; 
}

.people-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 1.25rem; 
}

.card {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    min-width: 0;
    margin: 0;
    padding: 1.25rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 1rem;
}

legend { 
    padding: 0 0.35rem; 
    font-size: 1.15rem; 
    font-weight: bold; 
}

label { 
    font-size: 0.9rem; 
}

small { 
    color: var(--muted); 
    font-size: 0.8rem; 
}

input, select, textarea {
    width: 100%;
    min-width: 0;
    padding: 0.7rem;
    font: inherit;
    color: var(--text);
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 0.6rem;
}

input[type="file"] { 
    font-size: 0.8rem; 
}

input[type="radio"], input[type="checkbox"] { 
    width: auto; 
    accent-color: var(--accent); 
}

textarea { 
    resize: vertical; 
}

.field-row { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 0.85rem; 
}

.field { 
    display: flex; 
    flex-direction: column; 
    gap: 0.4rem; 
    min-width: 0; 
}

.image-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 13rem;
    overflow: hidden;
    color: var(--muted);
    background: var(--background);
    border: 1px dashed var(--muted);
    border-radius: 0.75rem;
}

.image-preview img { 
    width: 100%; 
    height: 100%; 
    object-fit: contain; 
}

.notification { 
    margin: 0; 
    padding: 0; 
    border: 0; 
}

.notification legend { 
    margin-bottom: 0.5rem; 
    padding: 0; 
    font-size: 0.9rem; 
    font-weight: normal; 
}

.radio-row { 
    display: flex; 
    flex-wrap: wrap; 
    gap: 0.8rem;
}

.radio-row label, .terms { 
    display: flex; 
    align-items: center; 
    gap: 0.35rem; 
}

.payment-card { 
    width: min(570px, 100%); 
    align-self: center; 
}

.payment-row { 
    grid-template-columns: 1.3fr 0.7fr 1fr; 
}

.send-button, .button-link {
    padding: 0.9rem;
    font: inherit;
    text-align: center;
    text-decoration: none;
    background: var(--accent);
    color: var(--accent-text);
    border: 1px solid var(--accent);
    border-radius: 0.6rem;
    cursor: pointer;
}

.send-button:hover, .button-link:hover { 
    opacity: 0.8; 
}

.result-card { 
    width: min(570px, 100%); 
}

@media (max-width: 700px) {
    .people-grid { 
        grid-template-columns: 1fr; 
    }

    .app-header { 
        align-items: flex-start; 
        flex-direction: column; 
    }
}

@media (max-width: 400px) {
    .field-row { 
        grid-template-columns: 1fr; 
    }
}