/* メルマガ管理画面 - 共通スタイル */

:root {
    --color-bg: #f4f6f9;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-muted: #64748b;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-success-bg: #ecfdf5;
    --color-success-text: #047857;
    --color-error-bg: #fef2f2;
    --color-error-text: #b91c1c;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --radius: 8px;
    --sidebar-width: 220px;
    --header-height: 56px;
    --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ----- Buttons ----- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.25;
    cursor: pointer;
    text-decoration: none;
    background: var(--color-primary);
    color: #fff;
}

.btn:hover {
    background: var(--color-primary-hover);
    text-decoration: none;
    color: #fff;
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 13px;
}

.btn-ghost {
    background: transparent;
    color: var(--color-muted);
    border-color: var(--color-border);
}

.btn-ghost:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

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

.btn-secondary:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

/* ----- Forms ----- */

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    font-size: 13px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    max-width: 480px;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font: inherit;
    background: var(--color-surface);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-hint {
    margin-top: 0.35rem;
    font-size: 12px;
    color: var(--color-muted);
}

.form-error {
    margin-top: 0.35rem;
    font-size: 13px;
    color: var(--color-error-text);
}

/* ----- Alerts ----- */

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1.25rem;
    font-size: 14px;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success-text);
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
    border: 1px solid #fecaca;
}

/* ----- Cards ----- */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.card-title {
    margin: 0 0 0.75rem;
    font-size: 15px;
    font-weight: 700;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--color-muted);
}

/* ----- Guest layout (login) ----- */

.layout-guest {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, #eff6ff 0%, var(--color-bg) 50%);
}

.guest-main {
    width: 100%;
    max-width: 400px;
    padding: 1.5rem;
}

.guest-brand {
    text-align: center;
    margin-bottom: 1.5rem;
}

.guest-brand h1 {
    margin: 0;
    font-size: 1.5rem;
}

.guest-brand p {
    margin: 0.25rem 0 0;
    color: var(--color-muted);
    font-size: 14px;
}

.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: calc(var(--radius) + 2px);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
}

.login-card .form-input {
    max-width: none;
}

.login-card .btn {
    width: 100%;
    margin-top: 0.5rem;
}

/* ----- Admin layout ----- */

.layout-admin {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.admin-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.admin-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.admin-header__brand {
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-text);
    text-decoration: none;
}

.admin-header__brand:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.admin-header__user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-header__name {
    font-size: 13px;
    color: var(--color-muted);
}

.admin-shell {
    display: flex;
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 1.25rem;
    gap: 1.5rem;
}

.admin-sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    padding: 1.25rem 0;
}

.admin-nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.admin-nav__link {
    display: block;
    padding: 0.55rem 0.85rem;
    border-radius: var(--radius);
    color: var(--color-text);
    font-weight: 500;
    text-decoration: none;
}

.admin-nav__link:hover {
    background: var(--color-surface);
    text-decoration: none;
}

.admin-nav__link.is-active {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.admin-main {
    flex: 1;
    min-width: 0;
    padding: 1.25rem 0 2rem;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.page-title {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
}

.page-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.admin-footer {
    padding: 1rem 1.25rem;
    text-align: center;
    color: var(--color-muted);
    font-size: 12px;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.placeholder-note {
    color: var(--color-muted);
    font-size: 14px;
}

/* ----- Tables ----- */

.table-wrap {
    overflow-x: auto;
    margin-top: 1rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

.data-table th {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-muted);
    background: var(--color-bg);
}

.data-table tbody tr:hover {
    background: #f8fafc;
}

.text-right {
    text-align: right;
}

/* ----- Badges ----- */

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

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

.badge-muted {
    background: #f1f5f9;
    color: var(--color-muted);
}

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

/* ----- Pagination ----- */

.pagination {
    margin-top: 1rem;
}

.pagination__inner {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.pagination__info {
    font-size: 13px;
    color: var(--color-muted);
}

.pagination__link {
    font-size: 13px;
    font-weight: 600;
}

/* ----- Filters & misc ----- */

.filter-form__row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.code-sample {
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    font-size: 13px;
    overflow-x: auto;
}

.preview-stats {
    margin: 0 0 1rem;
    padding-left: 1.25rem;
}

.preview-stats li {
    margin-bottom: 0.35rem;
}

/* ----- Responsive ----- */

@media (max-width: 768px) {
    .admin-shell {
        flex-direction: column;
        padding: 0 1rem;
    }

    .admin-sidebar {
        width: 100%;
        padding-top: 0.75rem;
    }

    .admin-nav {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .admin-header__name {
        display: none;
    }
}