:root {
    --color-bg: #f4f6f8;
    --color-surface: #ffffff;
    --color-border: #dbe1e8;
    --color-text: #22292f;
    --color-muted: #6b7684;
    --color-primary: #2f6fed;
    --color-primary-dark: #1f4fb8;
    --color-danger: #d64545;
    --color-success: #2f9e5c;
    --radius: 6px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

a { color: var(--color-primary); }

.app-header {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 16px;
}

.app-header__brand a {
    font-weight: bold;
    font-size: 1.1rem;
    text-decoration: none;
    color: var(--color-text);
}

.app-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    flex: 1;
}

.app-nav a {
    font-size: 0.85rem;
    text-decoration: none;
    padding: 4px 6px;
    border-radius: var(--radius);
}

.app-nav a:hover { background: var(--color-bg); }

.app-logout { margin-left: auto; }

.link-button {
    background: none;
    border: none;
    color: var(--color-muted);
    cursor: pointer;
    font-size: 0.85rem;
    text-decoration: underline;
}

.app-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 16px 60px;
}

h1 { font-size: 1.4rem; margin-bottom: 4px; }
h2 { font-size: 1.15rem; margin-top: 28px; }
.page-desc { color: var(--color-muted); margin-top: 0; margin-bottom: 20px; }

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    font-size: 0.9rem;
}

th, td {
    border: 1px solid var(--color-border);
    padding: 6px 8px;
    text-align: right;
    white-space: nowrap;
}

th { background: #eef1f5; text-align: center; }
td:first-child, th:first-child { text-align: left; }
tbody tr:hover { background: #f9fbff; }

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

form.inline { display: inline; }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

label { display: block; font-size: 0.85rem; color: var(--color-muted); margin-bottom: 4px; }

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

input[type=text], input[type=password], input[type=number], input[type=date],
input[type=month], input[type=file], select, textarea {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.btn {
    display: inline-block;
    padding: 7px 16px;
    border-radius: var(--radius);
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9rem;
}

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

.btn--danger { background: var(--color-danger); border-color: var(--color-danger); }
.btn--secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }

.flash {
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.flash--success { background: #e5f6ec; color: var(--color-success); border: 1px solid #b9e5c9; }
.flash--error { background: #fbeaea; color: var(--color-danger); border: 1px solid #f0c2c2; }

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.summary-tile {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px;
}

.summary-tile__label { color: var(--color-muted); font-size: 0.8rem; }
.summary-tile__value { font-size: 1.4rem; font-weight: bold; }

.alert-list { list-style: none; padding: 0; margin: 0; }
.alert-list li {
    background: #fff7e6;
    border: 1px solid #f2d68f;
    border-radius: var(--radius);
    padding: 8px 12px;
    margin-bottom: 8px;
}

.login-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-card {
    width: 320px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 28px;
}

.login-card h1 { text-align: center; margin-bottom: 20px; }
.login-card .btn { width: 100%; margin-top: 12px; }