:root {
    --bg: #0f1724;
    --card: #0b1220;
    --muted: #9aa4b2;
    --accent: #4f46e5;
    --accent-2: #06b6d4;
    --glass: rgba(255, 255, 255, 0.03);
    --radius: 12px;
}
* {
    box-sizing: border-box;
}
html,
body {
    height: 100%;
}
body {
    margin: 0;
    background: linear-gradient(180deg, #071025 0%, #071725 100%);
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
    color: #e6eef8;
    font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
        "Helvetica Neue", Arial;
    -webkit-font-smoothing: antialiased;
}
.hint {
    margin-top: 6px;
    color: var(--muted);
    font-size: 12px;
}
.unit-price {
    align-self: flex-start;
    margin: 0;
    color: var(--accent);
    font-weight: 500;
    font-size: 12px;
}
input[type="month"] {
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.01),
        rgba(255, 255, 255, 0.02)
    );
    padding: 8px;
    color: #e6eef8;
}
input[type="month"]::before {
    color: #e6eef8;
}
input[type="month"]::-webkit-calendar-picker-indicator {
    filter: invert(1) brightness(1.2);
    cursor: pointer;
}
#shareWhatsApp {
    border: none;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: white;
    font-weight: 500;
}
#shareWhatsApp:hover {
    opacity: 0.9;
}
#export {
    border: none;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: white;
    font-weight: 500;
}
#export:hover {
    opacity: 0.9;
}
.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    align-items: end;
    gap: 12px;
}
.wrap {
    margin: 28px auto;
    padding: 0 18px;
    max-width: 600px;
}
.site-header {
    margin-top: 10px;
}
.site-header h1 {
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.4px;
}
.tag {
    margin: 6px 0 0;
    color: var(--muted);
}
.card {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border-radius: var(--radius);
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.02),
        rgba(255, 255, 255, 0.01)
    );
    padding: 20px;
}
.card-header .muted {
    margin: 0 0 12px;
    color: var(--muted);
}
.field {
    display: flex;
    flex-direction: column;
}
.field.full {
    grid-column: 1/-1;
}
label {
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 13px;
}
.label-row {
    display: block;
    margin-bottom: 6px;
}
input[type="number"],
input[type="text"] {
    transition: box-shadow 0.15s, border-color 0.15s;
    outline: none;
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.01),
        rgba(255, 255, 255, 0.02)
    );
    padding: 10px 12px;
    color: inherit;
}
input:focus {
    box-shadow: 0 6px 18px rgba(79, 70, 229, 0.12);
    border-color: rgba(79, 70, 229, 0.6);
}
.people-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 6px;
}
.person {
    display: grid;
    grid-template-columns: 1fr 96px 36px;
    align-items: center;
    gap: 8px;
    border-radius: 8px;
    background: var(--glass);
    padding: 8px;
}
.person input {
    padding: 8px;
}
.person .days {
    width: 100%;
}
.person .remove {
    cursor: pointer;
    border: 0;
    background: transparent;
    color: #ff7070;
    font-weight: 600;
}
.people-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}
.btn {
    display: inline-block;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    background: transparent;
    padding: 8px 12px;
    color: var(--muted);
}
.btn.small {
    padding: 6px 8px;
    font-size: 13px;
}
.btn.primary {
    border: 0;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: white;
}
.btn.ghost {
    border: 1px solid rgba(255, 255, 255, 0.04);
    background: transparent;
}
.actions {
    display: flex;
    gap: 8px;
}
.result {
    margin-top: 16px;
    border-radius: 8px;
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.02),
        rgba(255, 255, 255, 0.01)
    );
    padding: 12px;
    color: var(--muted);
}
.result .row {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.02);
    padding: 6px 0;
}
.result .row:last-child {
    border-bottom: 0;
    color: #e6eef8;
}
.muted {
    color: var(--muted);
}
@media (max-width: 720px) {
    .grid {
        grid-template-columns: 1fr;
    }
    .person {
        grid-template-columns: 1fr 86px 36px;
    }
    .wrap {
        padding: 0 14px;
    }
}
@media (max-width: 420px) {
    .person {
        grid-template-columns: 1fr 66px 36px;
    }
    .actions {
        flex-direction: column;
    }
}
.site-footer {
    margin: 28px auto;
    color: var(--muted);
    text-align: center;
}
.heart {
    display: inline-block;
    transform-origin: center;
    animation: beat 1s infinite;
}
@keyframes beat {
    0% {
        transform: scale(1);
    }
    20% {
        transform: scale(1.25);
    }
    40% {
        transform: scale(1);
    }
    60% {
        transform: scale(1.25);
    }
    80% {
        transform: scale(1);
    }
    100% {
        transform: scale(1);
    }
}