/* ===== リセット & ベース ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --sidebar-width: 200px;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-bg: #f1f5f9;
    --color-surface: #ffffff;
    --color-sidebar-bg: #1e293b;
    --color-sidebar-text: #cbd5e1;
    --color-sidebar-active: #ffffff;
    --color-sidebar-active-bg: #2563eb;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-error: #dc2626;
    --color-success: #16a34a;

    /* Weekly表の色 */
    --color-cell-remain: #22c55e;    /* 緑：残作業あり */
    --color-cell-notice: #f97316;   /* オレンジ：予告分 */
    --color-cell-empty: #94a3b8;    /* グレー：空き */
    --color-cell-busy: #ffffff;     /* 白：作業不可 */
    --color-cell-over: #f1f5f9;     /* 薄：上限超え */

    /* タスク進捗マス */
    --color-progress-done: #22c55e;
    --color-progress-remain: #94a3b8;
    --color-progress-complete: #475569;
}

body {
    font-family: 'Hiragino Sans', 'Meiryo', sans-serif;
    font-size: 14px;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

/* ===== アプリレイアウト ===== */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ===== サイドバー ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-sidebar-bg);
    color: var(--color-sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
}

.sidebar-logo {
    padding: 20px 16px;
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    border-bottom: 1px solid #334155;
    letter-spacing: 0.05em;
}

.sidebar-menu {
    list-style: none;
    flex: 1;
    padding: 8px 0;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    color: var(--color-sidebar-text);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    border-radius: 0;
}

.sidebar-menu li a:hover {
    background: #334155;
    color: #ffffff;
}

.sidebar-menu li a.active {
    background: var(--color-sidebar-active-bg);
    color: var(--color-sidebar-active);
}

.nav-icon {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid #334155;
}

.logout-link {
    color: var(--color-sidebar-text);
    text-decoration: none;
    font-size: 13px;
}

.logout-link:hover {
    color: #ffffff;
}

/* ===== メインコンテンツ ===== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 24px;
    min-height: 100vh;
}

.page-header {
    margin-bottom: 20px;
}

.page-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

/* ===== ログイン画面 ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
}

.login-card {
    background: var(--color-surface);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

.login-logo {
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}

.login-subtitle {
    text-align: center;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    color: var(--color-text);
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.btn-primary {
    display: block;
    width: 100%;
    padding: 11px;
    background: var(--color-primary);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    margin-top: 24px;
}

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

.alert {
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 18px;
}

.alert-error {
    background: #fef2f2;
    color: var(--color-error);
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: var(--color-success);
    border: 1px solid #bbf7d0;
}

/* ===== カード ===== */
.card {
    background: var(--color-surface);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* ===== テーブル共通 ===== */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

th, td {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    text-align: left;
}

th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--color-text-muted);
    white-space: nowrap;
}

/* ===== ユーティリティ ===== */
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }