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

:root {
    --bg: #f4f1ea;
    --card: #ffffff;
    --ink: #1f2a2e;
    --muted: #5c6b70;
    --accent: #0f6e5a;
    --accent-dark: #0a4f41;
    --border: #d9d3c5;
    --error: #b3261e;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Tahoma, sans-serif;
    background-color: var(--bg);
    color: var(--ink);
    line-height: 1.5;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 16px 48px;
}

.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 1.8rem;
    color: var(--accent-dark);
}

.subtitle {
    color: var(--muted);
}

.card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.card h2 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.converter {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 12px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

label {
    font-size: 0.9rem;
    font-weight: 600;
}

input,
select,
button {
    font: inherit;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background-color: #fff;
    color: var(--ink);
}

button {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
    cursor: pointer;
}

button:hover {
    background-color: var(--accent-dark);
}

.result {
    margin-top: 16px;
}

.date-ar {
    font-size: 1.2rem;
}

.error {
    color: var(--error);
    font-weight: 600;
}

[aria-invalid="true"] {
    border-color: var(--error);
}

:focus-visible {
    outline: 3px solid #e0a526;
    outline-offset: 2px;
}

.date-ar,
[lang="ar"] {
    font-family: "Noto Naskh Arabic", "Geeza Pro", "Segoe UI", Tahoma, sans-serif;
    text-align: right;
}

.today .date-en:first-of-type {
    color: var(--muted);
}

.today #today-hijri-en {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-dark);
}

@media (max-width: 480px) {
    .container {
        padding: 20px 12px 32px;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 16px;
    }

    .converter {
        flex-direction: column;
        align-items: stretch;
    }

    .converter button {
        width: 100%;
    }

    select {
        width: 100%;
    }
}