/*
 * 共通スタイル
 *
 * - ダークネイビーのサイドバー + ホワイト系のコンテンツ領域
 * - レスポンシブ：768px 未満ではサイドバーを上部に折り返す
 */

:root {
    --c-bg: #f5f7fa;
    --c-card: #ffffff;
    --c-border: #e3e8ef;
    --c-text: #1f2937;
    --c-text-muted: #6b7280;
    --c-sidebar: #1e2a3a;
    --c-sidebar-hover: #29384c;
    --c-sidebar-text: #e5edf6;
    --c-primary: #3858e9;
    --c-primary-hover: #2c46c0;
    --c-danger: #dc2626;
    --c-danger-hover: #b91c1c;
    --c-success-bg: #ecfdf5;
    --c-success-border: #a7f3d0;
    --c-success-text: #065f46;
    --c-error-bg: #fef2f2;
    --c-error-border: #fecaca;
    --c-error-text: #991b1b;
    --shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);
    --radius: 8px;
    --sidebar-w: 220px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--c-bg);
    color: var(--c-text);
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    line-height: 1.6;
}

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

/* レイアウト ---------------------------------------- */

body.has-sidebar {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    min-height: 100vh;
}

body.no-sidebar {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.sidebar {
    background: var(--c-sidebar);
    color: var(--c-sidebar-text);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
}

.sidebar__brand {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: .04em;
    padding: 0 8px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    margin-bottom: 16px;
}

.sidebar__nav { display: flex; flex-direction: column; flex: 1; }

.sidebar__link {
    color: var(--c-sidebar-text);
    padding: 10px 12px;
    border-radius: 6px;
    margin-bottom: 4px;
    font-size: 14px;
}

.sidebar__link:hover {
    background: var(--c-sidebar-hover);
    text-decoration: none;
}

.sidebar__link--bottom { margin-top: auto; }

.main {
    padding: 32px 40px;
    overflow: auto;
}

@media (max-width: 768px) {
    body.has-sidebar {
        grid-template-columns: 1fr;
    }
    .sidebar { padding: 16px; }
    .sidebar__nav { flex-direction: row; flex-wrap: wrap; gap: 8px; }
    .sidebar__link { margin: 0; }
    .sidebar__link--bottom { margin-left: auto; margin-top: 0; }
    .main { padding: 24px 16px; }
}

/* ページヘッダ ------------------------------------ */

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header__title {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
}

/* テーブル ---------------------------------------- */

.table-wrapper {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
}

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

.table th, .table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--c-border);
    vertical-align: middle;
}

.table thead th {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--c-text-muted);
    background: #f9fafb;
}

.table tbody tr:last-child td { border-bottom: 0; }

.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.mono { font-family: ui-monospace, 'SFMono-Regular', Consolas, monospace; font-size: 13px; }

.truncate {
    max-width: 280px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* コピーリンクボタン */
.copy-link {
    background: none;
    border: 0;
    padding: 0;
    color: var(--c-primary);
    font: inherit;
    cursor: pointer;
    text-decoration: underline dotted;
    font-family: ui-monospace, 'SFMono-Regular', Consolas, monospace;
    font-size: 13px;
}
.copy-link:hover { color: var(--c-primary-hover); }

/* ボタン ------------------------------------------ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid transparent;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color .15s, color .15s, border-color .15s;
    text-decoration: none;
    line-height: 1.4;
}

.btn--primary { background: var(--c-primary); color: #fff; }
.btn--primary:hover { background: var(--c-primary-hover); text-decoration: none; }
.btn--danger { background: var(--c-danger); color: #fff; }
.btn--danger:hover { background: var(--c-danger-hover); text-decoration: none; }
.btn--ghost {
    background: transparent;
    color: var(--c-text);
    border-color: var(--c-border);
}
.btn--ghost:hover { background: #f3f4f6; text-decoration: none; }

.btn--block { width: 100%; }
.btn--small { padding: 4px 10px; font-size: 12px; }

.inline-form { display: inline-block; margin: 0; }

/* フォーム ---------------------------------------- */

.form { display: flex; flex-direction: column; gap: 16px; }

.form--card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    max-width: 640px;
}

.form__row { display: flex; flex-direction: column; gap: 6px; }

.form__label {
    font-weight: 500;
    font-size: 13px;
    color: var(--c-text);
}

.required {
    background: #fee2e2;
    color: #991b1b;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 4px;
}

.hint {
    color: var(--c-text-muted);
    font-weight: 400;
    font-size: 12px;
}

.form__input {
    padding: 10px 12px;
    font-family: inherit;
    font-size: 14px;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    background: #fff;
    color: var(--c-text);
    transition: border-color .15s, box-shadow .15s;
}

.form__input:focus {
    outline: 0;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(56, 88, 233, .15);
}

.form__input.is-invalid {
    border-color: var(--c-danger);
    background: #fff5f5;
}

.form__help { color: var(--c-text-muted); font-size: 12px; margin: 0; }

.form__error {
    color: var(--c-error-text);
    font-size: 12px;
    margin: 0;
}

.form__actions { display: flex; gap: 8px; margin-top: 8px; }

/* ログインカード --------------------------------- */

.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
}

.auth-card__title {
    margin: 0 0 20px;
    font-size: 20px;
    text-align: center;
}

/* アラート --------------------------------------- */

.alert {
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
    border: 1px solid;
}

.alert--error {
    background: var(--c-error-bg);
    border-color: var(--c-error-border);
    color: var(--c-error-text);
}

.alert--success {
    background: var(--c-success-bg);
    border-color: var(--c-success-border);
    color: var(--c-success-text);
}

/* 空状態 ------------------------------------------ */

.empty {
    background: var(--c-card);
    border: 1px dashed var(--c-border);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
}

.empty p { color: var(--c-text-muted); margin: 0 0 16px; }

/* トースト --------------------------------------- */

.toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%) translateY(20px);
    background: #1f2937;
    color: #fff;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 13px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .2s;
    z-index: 100;
}

.toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* エラーページ ----------------------------------- */

.error-page {
    text-align: center;
    padding: 48px 24px;
}

.error-page__status {
    font-size: 80px;
    font-weight: 700;
    margin: 0;
    color: var(--c-text-muted);
    line-height: 1;
}

.error-page__title { font-size: 22px; margin: 16px 0 8px; }
.error-page__message { color: var(--c-text-muted); }