* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Yu Gothic", "游ゴシック", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
    background: #f4f6f9;
    color: #333;
}

.app-header {
    background: #1F3A5F;
    color: #fff;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.app-header__title {
    font-size: 1.2rem;
    font-weight: bold;
}

.app-nav {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.app-nav a {
    color: #fff;
    text-decoration: none;
}

.app-nav a:hover {
    text-decoration: underline;
}

.app-nav__user {
    opacity: 0.85;
    font-size: 0.9rem;
}

.app-main {
    max-width: 960px;
    margin: 24px auto;
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.app-footer {
    text-align: center;
    color: #999;
    font-size: 0.8rem;
    padding: 16px;
}

h1 {
    margin-top: 0;
    border-bottom: 2px solid #1F3A5F;
    padding-bottom: 8px;
}

.alert {
    padding: 10px 16px;
    border-radius: 4px;
    margin-bottom: 16px;
}

.alert-error {
    background: #fdecea;
    color: #b3261e;
    border: 1px solid #f5c2c0;
}

.alert-success {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

.btn,
button,
.btn-secondary {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 4px;
    border: 1px solid #1F3A5F;
    background: #1F3A5F;
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-secondary {
    background: #fff;
    color: #1F3A5F;
}

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

.data-table th,
.data-table td {
    border: 1px solid #ddd;
    padding: 8px 12px;
    text-align: left;
}

.data-table th {
    background: #eef1f6;
}

.form h2 {
    font-size: 1.05rem;
    margin: 28px 0 12px;
    padding-bottom: 4px;
    border-bottom: 1px solid #ddd;
    color: #1F3A5F;
}

.form h2:first-of-type {
    margin-top: 0;
}

.form label {
    display: block;
    margin-bottom: 14px;
    font-weight: bold;
}

.form input,
.form select {
    display: block;
    width: 100%;
    max-width: 360px;
    padding: 8px;
    margin-top: 4px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-weight: normal;
}

.form .checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: normal;
}

.form .checkbox input {
    width: auto;
}

.form-actions {
    margin-top: 20px;
    display: flex;
    gap: 12px;
}

/* ログイン・セットアップ画面 */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #1F3A5F;
    margin: 0;
}

.login-box {
    background: #fff;
    padding: 32px;
    border-radius: 8px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.login-box h1 {
    font-size: 1.2rem;
    text-align: center;
    border: none;
    margin-bottom: 16px;
}

.login-box label {
    display: block;
    margin-bottom: 12px;
    font-weight: bold;
}

.login-box input {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 4px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.login-box button {
    width: 100%;
    padding: 10px;
    margin-top: 8px;
}

/* 受給者証の写し（添付ファイル） */
.cert-images {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.cert-image-item {
    width: 140px;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 8px;
    text-align: center;
    background: #fafafa;
}

.cert-image-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 4px;
    display: block;
}

.cert-file-link {
    display: block;
    height: 120px;
    line-height: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.85rem;
    color: #1F3A5F;
}

.cert-delete-btn {
    margin-top: 8px;
    border-color: #b3261e;
    color: #b3261e;
    font-size: 0.8rem;
    padding: 4px 10px;
}