:root {
    color-scheme: light;
    --bg: #f3f4f6;
    --card: #ffffff;
    --text: #111827;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --border: #d1d5db;
    --error-bg: #fef2f2;
    --error-text: #991b1b;
    --success-bg: #ecfdf5;
    --success-text: #166534;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.layout {
    min-height: 100vh;
    padding: 1rem;
}

.card {
    max-width: 960px;
    margin: 0 auto;
    background: var(--card);
    border-radius: 18px;
    padding: 1.25rem;
    box-shadow: 0 16px 48px rgba(17, 24, 39, 0.08);
}

.card-header,
.header-actions,
.grid {
    display: flex;
    gap: 1rem;
}

.card-header,
.header-actions {
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.eyebrow {
    margin: 0 0 0.35rem;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
}

h1 {
    margin: 0;
    font-size: 1.75rem;
}

.lead,
.hint,
.empty-state {
    color: var(--muted);
}

.stack {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.field {
    display: grid;
    gap: 0.5rem;
    font-weight: 700;
}

.field span {
    font-size: 0.95rem;
}

input,
textarea,
button,
.button {
    font: inherit;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.85rem 0.95rem;
    background: #fff;
}

textarea {
    min-height: 10rem;
    resize: vertical;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: 0;
    border-radius: 999px;
    padding: 0.85rem 1.15rem;
    text-decoration: none;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-weight: 700;
}

.button:hover {
    background: var(--primary-dark);
}

.button.secondary {
    background: #e5e7eb;
    color: var(--text);
}

.button.ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.notice {
    margin-top: 1rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    font-weight: 700;
}

.notice-error {
    background: var(--error-bg);
    color: var(--error-text);
}

.notice-success {
    background: var(--success-bg);
    color: var(--success-text);
}

.two-columns {
    flex-wrap: wrap;
}

.two-columns > * {
    flex: 1 1 220px;
}

.export-links {
    margin: 1rem 0;
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 0.85rem 0.75rem;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
    text-align: left;
}

th {
    font-size: 0.9rem;
}

code {
    background: #f3f4f6;
    padding: 0.15rem 0.35rem;
    border-radius: 6px;
}

@media (max-width: 640px) {
    .card {
        padding: 1rem;
        border-radius: 0;
        min-height: 100vh;
    }

    .layout {
        padding: 0;
    }

    h1 {
        font-size: 1.4rem;
    }

    .button,
    .button.secondary,
    .button.ghost {
        width: 100%;
    }

    .header-actions {
        width: 100%;
    }

    .header-actions form {
        width: 100%;
    }
}