body {
    font-family: 'Inter', sans-serif;
}

/* bento-card の overflow:hidden / hover 移動は sticky を壊すので打ち消し */
#gantt-container.gantt-board {
    overflow: visible;
}

#gantt-container.gantt-board:hover {
    transform: none;
    z-index: 20;
}

/* サイト固定ヘッダー(h-16)の直下に日付行を固定 */
.gantt-sticky-header {
    position: sticky;
    top: 4rem;
    z-index: 40;
    display: flex;
    background-color: #ffffff;
    box-shadow: 0 1px 0 0 #e5e7eb;
}

body.dark-mode .gantt-sticky-header {
    background-color: #1e293b; /* slate-800 */
    box-shadow: 0 1px 0 0 #334155;
}

.gantt-header-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    cursor: grab;
}

.gantt-header-scroll::-webkit-scrollbar {
    display: none;
}

.gantt-header-scroll.is-panning {
    cursor: grabbing;
}

.gantt-chart {
    cursor: grab;
    overflow-x: auto;
    overflow-y: hidden;
}

.gantt-chart.is-panning {
    cursor: grabbing;
    user-select: none;
}

/* 左のサブタスク塊の下線。layout に影響しない box-shadow で右ガントの横線位置と揃える */
.wbs-row-block {
    box-shadow: inset 0 -1px 0 0 #e5e7eb; /* gray-200 */
}

body.dark-mode .wbs-row-block {
    box-shadow: inset 0 -1px 0 0 #334155; /* slate-700 */
}

/* プロジェクト区切り（高さ計算に影響しない） */
.project-item {
    box-shadow: inset 0 -2px 0 0 #d1d5db; /* gray-300: 行線より少し強調 */
}

body.dark-mode .project-item {
    box-shadow: inset 0 -2px 0 0 #475569; /* slate-600 */
}

#task-list,
#task-list-body,
#gantt-grid {
    box-sizing: border-box;
}

.gantt-chart .task-bar {
    cursor: grab;
    overflow: visible;
}

.gantt-chart .task-bar-resize {
    cursor: ew-resize;
}

.gantt-chart::-webkit-scrollbar {
    height: 10px;
}

.gantt-chart::-webkit-scrollbar-track {
    background-color: #f1f1f1;
    border-radius: 10px;
}

.gantt-chart::-webkit-scrollbar-thumb {
    background-color: #a8a29e;
    border-radius: 10px;
}

/* stone-400 */
.gantt-chart::-webkit-scrollbar-thumb:hover {
    background-color: #78716c;
}

/* stone-500 */
.weekend {
    background-color: #f7f7f7;
}

.today-marker {
    position: absolute;
    width: 3px;
    height: 100%;
    background-color: rgba(239, 68, 68, 0.7);
    z-index: 20;
    top: 0;
}

.today-marker::after {
    content: '今日';
    position: absolute;
    top: -22px;
    left: -18px;
    background-color: #ef4444;
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: bold;
}

/* 当たり判定は左右に広め。縦はバー高さいっぱいで、ギャップ0時に隣レーンを奪わない */
.task-bar-resize {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 16px;
    cursor: ew-resize;
    z-index: 30;
    pointer-events: auto;
    touch-action: none;
}

.task-bar-resize-left {
    left: -8px;
    border-radius: 0.5rem 0 0 0.5rem;
}

.task-bar-resize-right {
    right: -8px;
    border-radius: 0 0.5rem 0.5rem 0;
}

.task-bar-resize::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 6px;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.12s ease;
    pointer-events: none;
}

.task-bar-resize-left::after {
    left: 8px;
}

.task-bar-resize-right::after {
    right: 8px;
}

.task-bar-resize:hover::after,
.task-bar-resize:active::after {
    opacity: 1;
    background-color: rgba(15, 23, 42, 0.18);
}

body.dark-mode .task-bar-resize:hover::after,
body.dark-mode .task-bar-resize:active::after {
    background-color: rgba(255, 255, 255, 0.25);
}

.task-bar-placeholder.period-drop-target {
    background-color: rgba(99, 102, 241, 0.14);
    outline: 2px dashed rgba(99, 102, 241, 0.55);
    outline-offset: -2px;
}

body.dark-mode .task-bar-placeholder.period-drop-target {
    background-color: rgba(129, 140, 248, 0.18);
    outline-color: rgba(165, 180, 252, 0.7);
}

.task-bar.period-lane-preview {
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.28);
    opacity: 0.92;
}

.gantt-day-line,
.today-marker {
    pointer-events: none;
}

.modal-content {
    animation: modal-fade-in 0.3s ease-out;
}

@keyframes modal-fade-in {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.drag-handle {
    cursor: grab;
    padding: 0 8px;
    color: #94a3b8;
    /* slate-400 */
    opacity: 0;
    transition: opacity 0.15s ease, color 0.15s ease;
}

/* プロジェクト名 / サブタスク行へホバーしたときだけ表示 */
.group:hover .drag-handle,
.drag-handle:active,
.sortable-chosen .drag-handle {
    opacity: 1;
}

.drag-handle:hover {
    color: #475569;
    /* slate-600 */
}

.sortable-ghost {
    opacity: 0.4;
    background: #e0f2fe;
    /* sky-100 */
}

#user-info-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    /* 8pxの間隔 */
}

body.dark-mode {
    background-color: #020617;
    /* slate-950 */
    color: #cbd5e1;
    /* slate-300 */
}

/* ヘッダー */
body.dark-mode header h1 {
    color: #f1f5f9;
    /* slate-100 */
}

body.dark-mode header p {
    color: #94a3b8;
    /* slate-400 */
}

body.dark-mode header button#prev-month-btn,
body.dark-mode header button#next-month-btn {
    color: #cbd5e1;
    /* slate-300 */
}

body.dark-mode header button#prev-month-btn:hover,
body.dark-mode header button#next-month-btn:hover {
    background-color: #334155;
    /* slate-700 */
}

body.dark-mode header p#current-month-year {
    color: #e2e8f0;
    /* slate-200 */
}

body.dark-mode header button#today-btn {
    background-color: #334155;
    /* slate-700 */
    color: #cbd5e1;
    /* slate-300 */
    border-color: #475569;
    /* slate-600 */
}

body.dark-mode header button#today-btn:hover {
    background-color: #475569;
    /* slate-600 */
}

body.dark-mode header button.wbs-settings-btn {
    background-color: #334155;
    color: #cbd5e1;
    border-color: #475569;
}

body.dark-mode header button.wbs-settings-btn:hover {
    background-color: #475569;
}

body.dark-mode header button#addProjectBtn {
    background-color: #2563eb;
    /* blue-600 */
}

body.dark-mode header button#addProjectBtn:hover {
    background-color: #1d4ed8;
    /* blue-700 */
}

/* ガントコンテナ */
body.dark-mode #gantt-container {
    background-color: #1e293b;
    /* slate-800 */
    border: 1px solid #334155;
    /* slate-700 */
}

/* タスクリスト */
body.dark-mode #task-list {
    border-color: #334155;
    /* slate-700 */
}

body.dark-mode #task-list .bg-gray-50 {
    background-color: #1e293b;
    /* slate-800 (ヘッダー背景) */
    border-bottom: 1px solid #334155;
    /* slate-700 */
}

body.dark-mode #task-list h2 {
    color: #f1f5f9;
    /* slate-100 */
}

body.dark-mode #task-list-body .project-item .border-r {
    border-color: #334155;
}

body.dark-mode #task-list-body .project-item span {
    color: #f1f5f9;
}

body.dark-mode .drag-handle {
    color: #64748b;
    /* slate-500 */
}

body.dark-mode .group:hover .drag-handle,
body.dark-mode .drag-handle:active,
body.dark-mode .sortable-chosen .drag-handle {
    opacity: 1;
}

body.dark-mode .drag-handle:hover {
    color: #94a3b8;
    /* slate-400 */
}

body.dark-mode .sortable-ghost {
    background: #3730a3;
    /* indigo-800 */
}

body.dark-mode button.add-subtask-btn {
    color: #93c5fd;
    /* blue-300 */
}

body.dark-mode button.add-subtask-btn:hover {
    color: #60a5fa;
    /* blue-400 */
}

body.dark-mode button.edit-project-btn,
body.dark-mode button.edit-subtask-btn {
    color: #94a3b8;
    /* slate-400 */
}

body.dark-mode button.edit-project-btn:hover,
body.dark-mode button.edit-subtask-btn:hover {
    color: #cbd5e1;
    /* slate-300 */
}

body.dark-mode button.delete-project-btn,
body.dark-mode button.delete-subtask-btn {
    color: #f87171;
    /* red-400 */
}

body.dark-mode button.delete-project-btn:hover,
body.dark-mode button.delete-subtask-btn:hover {
    color: #ef4444;
    /* red-500 */
}

body.dark-mode #task-list-body .subtask-list-container .border-b {
    border-color: #334155;
}

body.dark-mode #task-list-body .subtask-list-container .text-gray-600 {
    color: #94a3b8;
    /* slate-400 */
}

/* ガントチャート */
body.dark-mode .gantt-chart::-webkit-scrollbar-track {
    background: #1e293b;
    /* slate-800 */
}

body.dark-mode .gantt-chart::-webkit-scrollbar-thumb {
    background: #475569;
    /* slate-600 */
}

body.dark-mode .gantt-chart::-webkit-scrollbar-thumb:hover {
    background: #64748b;
    /* slate-500 */
}

body.dark-mode #date-header {
    background-color: #334155;
    /* slate-700 */
}

body.dark-mode #date-header .border-b-2,
body.dark-mode #date-header .border-b {
    border-color: #475569;
    /* slate-600 */
}

body.dark-mode #date-header .border-r {
    border-color: #475569;
    /* slate-600 */
}

body.dark-mode #date-header .font-semibold {
    color: #f1f5f9;
    /* slate-100 */
}

body.dark-mode #date-header .text-gray-500 {
    color: #94a3b8;
    /* slate-400 */
}

body.dark-mode .weekend {
    background-color: #26334a;
    /* slate-800の少し明るい色 */
}

body.dark-mode #gantt-grid .border-r {
    border-color: #334155;
    /* slate-700 */
}

body.dark-mode #gantt-grid .border-b {
    border-color: #334155;
    /* slate-700 */
}

body.dark-mode .today-marker {
    background-color: rgba(248, 113, 113, 0.7);
    /* red-400 */
}

body.dark-mode .today-marker::after {
    background-color: #f87171;
    /* red-400 */
}

/* タスクバー */
body.dark-mode .task-bar {
    color: #1e293b;
    /* slate-800 */
}

/* バー上の文字色 */
body.dark-mode .task-bar.bg-red-300 {
    background-color: #fda4af;
    /* rose-300 */
}

/* 予定バー */
body.dark-mode .task-bar.bg-blue-300 {
    background-color: #93c5fd;
    /* blue-300 */
}

/* 実施バー */
body.dark-mode .task-bar:hover {
    opacity: 0.9;
}

/* モーダル */
body.dark-mode #modal .bg-white {
    background-color: #334155;
    /* slate-700 */
}

body.dark-mode #modal #modal-title {
    color: #f1f5f9;
    /* slate-100 */
}

body.dark-mode #modal label {
    color: #cbd5e1;
    /* slate-300 */
}

body.dark-mode #modal input[type="text"],
body.dark-mode #modal input[type="date"] {
    background-color: #475569;
    /* slate-600 */
    border-color: #64748b;
    /* slate-500 */
    color: #f1f5f9;
}

body.dark-mode #modal input[type="date"] {
    background-color: #334155;
    border-color: #475569;
    color: #f1f5f9;
}

body.dark-mode #modal input:focus {
    border-color: #60a5fa;
    /* blue-400 */
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.4);
}

body.dark-mode #modal #modal-cancel {
    background-color: #475569;
    /* slate-600 */
    color: #cbd5e1;
    /* slate-300 */
}

body.dark-mode #modal #modal-cancel:hover {
    background-color: #525f77;
}

body.dark-mode #modal #modal-save {
    background-color: #2563eb;
    /* blue-600 */
}

body.dark-mode #modal #modal-save:hover {
    background-color: #1d4ed8;
    /* blue-700 */
}

body.dark-mode #modal #modal-delete {
    background-color: #dc2626;
    /* red-600 */
}

body.dark-mode #modal #modal-delete:hover {
    background-color: #b91c1c;
    /* red-700 */
}

body.dark-mode #modal .border-t {
    border-color: #334155;
    /* slate-700 */
}

body.dark-mode #modal #modal-delete {
    background-color: #dc2626;
    /* red-600 */
}

body.dark-mode #modal #modal-delete:hover {
    background-color: #b91c1c;
    /* red-700 */
}

body.dark-mode #modal .border-t {
    border-color: #334155;
    /* slate-700 */
}