:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-card-hover: #1e2d4a;
    --accent: #7c3aed;
    --accent-light: #a855f7;
    --accent-glow: rgba(124, 58, 237, 0.3);
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.2);
    --danger: #ef4444;
    --warning: #f59e0b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #2d2d4e;
    --border-light: #3d3d5e;
    --radius: 12px;
    --radius-sm: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    line-height: 1.6;
}

/* ── ナビゲーション ── */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand span {
    font-size: 1.4rem;
}

.navbar-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-card);
    border-color: var(--border-light);
}

.nav-link.active {
    color: var(--accent-light);
}

/* ── レイアウト ── */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ── ページヘッダー ── */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.page-header .subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ── 全体進捗 ── */
.overall-progress {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.progress-text strong {
    color: var(--text-primary);
    font-size: 1.1rem;
}

.progress-bar-wrapper {
    flex: 1;
    background: var(--bg-secondary);
    border-radius: 999px;
    height: 8px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 999px;
    transition: width 0.4s ease;
}

.progress-bar-fill.complete {
    background: linear-gradient(90deg, var(--success), #34d399);
}

.progress-pct {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    min-width: 3em;
    text-align: right;
}

/* ── ゲームカード ── */
.game-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: border-color 0.2s;
}

.game-card:hover {
    border-color: var(--border-light);
}

.game-card.all-done {
    border-color: rgba(16, 185, 129, 0.4);
}

.game-header {
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    user-select: none;
}

.game-icon {
    font-size: 1.3rem;
    width: 2rem;
    text-align: center;
    flex-shrink: 0;
}

.game-icon-img {
    width: 32px;
    height: 32px;
    max-width: 32px;
    max-height: 32px;
    min-width: 32px;
    min-height: 32px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
    display: block;
}

/* 管理画面のアイコンプレビュー */
.icon-preview {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.icon-preview img {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    object-fit: cover;
    border: 2px solid var(--border-light);
}

.icon-preview-placeholder {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--bg-secondary);
    border: 2px dashed var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    user-select: none;
}

.file-input-label:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.file-input-name {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

.game-name {
    flex: 1;
    font-weight: 600;
    font-size: 1rem;
}

.game-progress-badge {
    font-size: 0.8rem;
    padding: 0.2rem 0.7rem;
    border-radius: 999px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    white-space: nowrap;
}

.game-progress-badge.done {
    background: var(--success-glow);
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.3);
}

.game-mini-bar {
    width: 60px;
    background: var(--bg-secondary);
    border-radius: 999px;
    height: 4px;
    overflow: hidden;
}

.game-mini-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 999px;
    transition: width 0.4s ease;
}

.game-mini-bar-fill.complete {
    background: var(--success);
}

.collapse-icon {
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: transform 0.2s;
}

.game-card.collapsed .collapse-icon {
    transform: rotate(-90deg);
}

.task-list {
    padding: 0.5rem 0;
}

.game-card.collapsed .task-list {
    display: none;
}

.task-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.25rem;
    transition: background 0.15s;
    cursor: pointer;
}

.task-item:hover {
    background: var(--bg-card-hover);
}

.task-item:last-child {
    border-radius: 0 0 var(--radius) var(--radius);
}

.task-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-radius: 6px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    background: var(--bg-secondary);
}

.task-item.checked .task-checkbox {
    background: var(--success);
    border-color: var(--success);
}

.task-checkbox svg {
    display: none;
    width: 12px;
    height: 12px;
    stroke: white;
    stroke-width: 3;
    fill: none;
}

.task-item.checked .task-checkbox svg {
    display: block;
}

.task-label {
    font-size: 0.95rem;
    color: var(--text-primary);
    flex: 1;
    transition: all 0.2s;
}

.task-item.checked .task-label {
    color: var(--text-muted);
    text-decoration: line-through;
}

/* ── 管理ページ ── */
.manage-section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ── フォーム ── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.form-group {
    flex: 1;
}

label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

input[type="text"],
select {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 0.55rem 0.85rem;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="text"]:focus,
select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

select option {
    background: var(--bg-secondary);
}

/* ── ボタン ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-light);
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 0.3rem 0.65rem;
    font-size: 0.8rem;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 0.3rem 0.65rem;
    font-size: 0.8rem;
}

.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--border-light);
}

/* ── ゲーム管理アコーディオン ── */
.manage-game-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
}

.manage-game-header {
    padding: 0.9rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.manage-game-name {
    flex: 1;
    font-weight: 600;
}

.manage-task-list {
    padding: 0.75rem 1.25rem;
}

.manage-task-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
}

.manage-task-item:last-child {
    border-bottom: none;
}

.manage-task-name {
    flex: 1;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.add-task-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.add-task-form input {
    font-size: 0.9rem;
}

/* ── インライン編集 ── */
.inline-edit {
    display: none;
    gap: 0.4rem;
    align-items: center;
    flex: 1;
}

.inline-edit.active {
    display: flex;
}

.inline-edit input {
    flex: 1;
    font-size: 0.9rem;
    padding: 0.3rem 0.6rem;
}

/* ── メッセージ ── */
.flash {
    padding: 0.75rem 1.1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    border: 1px solid;
}

.flash.success {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.flash.error {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #f87171;
}

/* ── 空状態 ── */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 0.75rem;
}

.empty-state p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

/* ── 連続日数カード ── */
.streak-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--accent);
    border-radius: var(--radius);
    padding: 1rem 1.25rem 1rem 1.1rem;
    margin-bottom: 1rem;
}

.streak-card.on-fire {
    border-left-color: #f59e0b;
    background: linear-gradient(90deg, rgba(245,158,11,0.07) 0%, var(--bg-card) 50%);
}

.streak-card.fresh {
    border-left-color: var(--success);
    background: linear-gradient(90deg, rgba(16,185,129,0.07) 0%, var(--bg-card) 50%);
}

.streak-card.streak-zero {
    border-left-color: var(--border-light);
}

.streak-icon-wrap {
    font-size: 2rem;
    line-height: 1;
    flex-shrink: 0;
    width: 2.5rem;
    text-align: center;
}

.streak-card.streak-zero .streak-icon-wrap {
    opacity: 0.35;
}

.streak-body {
    flex: 1;
    min-width: 0;
}

.streak-count {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    white-space: nowrap;
}

.streak-count em {
    font-style: normal;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.streak-card.streak-zero .streak-count {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.streak-card.streak-zero .streak-count em {
    display: none;
}

.streak-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.streak-best {
    flex-shrink: 0;
    text-align: center;
    padding: 0.5rem 0 0.5rem 1rem;
    border-left: 1px solid var(--border);
    min-width: 4rem;
}

.streak-best-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-secondary);
    white-space: nowrap;
}

.streak-best-value em {
    font-style: normal;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.streak-best-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
    letter-spacing: 0.03em;
}

/* ── iOS スタイル トグルスイッチ ── */
.game-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem 0;
    flex-shrink: 0;
}

.game-toggle__track {
    width: 46px;
    height: 26px;
    border-radius: 13px;
    background: var(--border-light);
    position: relative;
    transition: background 0.25s ease;
    flex-shrink: 0;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.3);
}

.game-toggle--on .game-toggle__track {
    background: var(--success);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.15), 0 0 0 1px rgba(16,185,129,0.4);
}

.game-toggle__thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    box-shadow: 0 1px 4px rgba(0,0,0,0.35);
    transition: transform 0.25s ease;
}

.game-toggle--on .game-toggle__thumb {
    transform: translateX(20px);
}

.game-toggle__label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    transition: color 0.2s;
    min-width: 2.2rem;
}

.game-toggle--on .game-toggle__label {
    color: var(--success);
}

.game-toggle:hover .game-toggle__track {
    opacity: 0.85;
}

.game-toggle:active .game-toggle__thumb {
    width: 24px;
}

/* ── レスポンシブ ── */
@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }

    .form-row {
        flex-direction: column;
    }

    .overall-progress {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .game-mini-bar {
        display: none;
    }
}