/* CSS変数とテーマシステム */
:root {
    /* Colors - Light Theme */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #dbeafe;
    --color-primary-bg: rgba(59, 130, 246, 0.1);
    --color-secondary: #6b7280;
    --color-secondary-hover: #4b5563;
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    --color-info: #06b6d4;

    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-accent: #f8fafc;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --text-inverse: #ffffff;

    /* Borders */
    --border-color: #e5e7eb;
    --border-color-light: #f3f4f6;
    --border-color-dark: #d1d5db;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;

    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
}

/* Black Theme - 真っ黒 */
[data-theme="dark"] {
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-primary-light: #1e3a8a;
    --color-primary-bg: rgba(59, 130, 246, 0.2);
    --color-secondary: #9ca3af;
    --color-secondary-hover: #d1d5db;
    --color-success: #34d399;
    --color-success-bg: rgba(52, 211, 153, 0.2);
    --color-warning: #fbbf24;
    --color-warning-bg: rgba(251, 191, 36, 0.2);
    --color-error: #f87171;
    --color-error-bg: rgba(248, 113, 113, 0.2);
    --color-info: #22d3ee;

    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #171717;
    --bg-accent: #0f0f0f;
    --bg-overlay: rgba(0, 0, 0, 0.9);

    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-tertiary: #737373;
    --text-inverse: #000000;

    --border-color: #262626;
    --border-color-light: #333333;
    --border-color-dark: #404040;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.6), 0 2px 4px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -2px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
}

/* Navy Theme - ダークネイビー */
[data-theme="navy"] {
    --color-primary: #60a5fa;
    --color-primary-hover: #93c5fd;
    --color-primary-light: #1e3a5f;
    --color-primary-bg: rgba(96, 165, 250, 0.2);
    --color-secondary: #94a3b8;
    --color-secondary-hover: #cbd5e1;
    --color-success: #34d399;
    --color-success-bg: rgba(52, 211, 153, 0.2);
    --color-warning: #fbbf24;
    --color-warning-bg: rgba(251, 191, 36, 0.2);
    --color-error: #f87171;
    --color-error-bg: rgba(248, 113, 113, 0.2);
    --color-info: #22d3ee;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-accent: #1e3a5f;
    --bg-overlay: rgba(15, 23, 42, 0.9);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-inverse: #0f172a;

    --border-color: #334155;
    --border-color-light: #475569;
    --border-color-dark: #64748b;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

/* Sky Blue Theme - 爽やかスカイブルー */
[data-theme="skyblue"] {
    --color-primary: #0ea5e9;
    --color-primary-hover: #0284c7;
    --color-primary-light: #e0f2fe;
    --color-primary-bg: rgba(14, 165, 233, 0.1);
    --color-secondary: #64748b;
    --color-secondary-hover: #475569;
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    --color-info: #06b6d4;

    --bg-primary: #f0f9ff;
    --bg-secondary: #e0f2fe;
    --bg-tertiary: #bae6fd;
    --bg-accent: #7dd3fc;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    --text-primary: #0c4a6e;
    --text-secondary: #0369a1;
    --text-tertiary: #0ea5e9;
    --text-inverse: #ffffff;

    --border-color: #7dd3fc;
    --border-color-light: #bae6fd;
    --border-color-dark: #38bdf8;

    --shadow-sm: 0 1px 2px 0 rgba(14, 165, 233, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(14, 165, 233, 0.15), 0 2px 4px -1px rgba(14, 165, 233, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(14, 165, 233, 0.15), 0 4px 6px -2px rgba(14, 165, 233, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(14, 165, 233, 0.15), 0 10px 10px -5px rgba(14, 165, 233, 0.08);
}

/* Lime Theme - フレッシュライム */
[data-theme="lime"] {
    --color-primary: #65a30d;
    --color-primary-hover: #4d7c0f;
    --color-primary-light: #ecfccb;
    --color-primary-bg: rgba(101, 163, 13, 0.1);
    --color-secondary: #57534e;
    --color-secondary-hover: #44403c;
    --color-success: #22c55e;
    --color-success-bg: rgba(34, 197, 94, 0.1);
    --color-warning: #eab308;
    --color-warning-bg: rgba(234, 179, 8, 0.1);
    --color-error: #dc2626;
    --color-error-bg: rgba(220, 38, 38, 0.1);
    --color-info: #06b6d4;

    --bg-primary: #fefce8;
    --bg-secondary: #ecfccb;
    --bg-tertiary: #d9f99d;
    --bg-accent: #bef264;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    --text-primary: #365314;
    --text-secondary: #4d7c0f;
    --text-tertiary: #65a30d;
    --text-inverse: #ffffff;

    --border-color: #bef264;
    --border-color-light: #d9f99d;
    --border-color-dark: #a3e635;

    --shadow-sm: 0 1px 2px 0 rgba(101, 163, 13, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(101, 163, 13, 0.15), 0 2px 4px -1px rgba(101, 163, 13, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(101, 163, 13, 0.15), 0 4px 6px -2px rgba(101, 163, 13, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(101, 163, 13, 0.15), 0 10px 10px -5px rgba(101, 163, 13, 0.08);
}

/* Pink Theme - ソフトピンク */
[data-theme="pink"] {
    --color-primary: #db2777;
    --color-primary-hover: #be185d;
    --color-primary-light: #fce7f3;
    --color-primary-bg: rgba(219, 39, 119, 0.1);
    --color-secondary: #78716c;
    --color-secondary-hover: #57534e;
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    --color-info: #06b6d4;

    --bg-primary: #fdf2f8;
    --bg-secondary: #fce7f3;
    --bg-tertiary: #fbcfe8;
    --bg-accent: #f9a8d4;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    --text-primary: #831843;
    --text-secondary: #9d174d;
    --text-tertiary: #be185d;
    --text-inverse: #ffffff;

    --border-color: #f9a8d4;
    --border-color-light: #fbcfe8;
    --border-color-dark: #f472b6;

    --shadow-sm: 0 1px 2px 0 rgba(219, 39, 119, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(219, 39, 119, 0.15), 0 2px 4px -1px rgba(219, 39, 119, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(219, 39, 119, 0.15), 0 4px 6px -2px rgba(219, 39, 119, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(219, 39, 119, 0.15), 0 10px 10px -5px rgba(219, 39, 119, 0.08);
}

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

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    transition: background-color 0.3s ease, color 0.3s ease;
}


/* App Layout */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar-nav {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 100;
    flex-shrink: 0;
}

/* サイドバー閉じた状態 */
.sidebar-nav.closed {
    width: 0;
    min-width: 0;
    overflow: hidden;
    border-right: none;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    height: 65px;
    flex-shrink: 0;
    box-sizing: border-box;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
}

.logo i {
    font-size: 1.5rem;
}

.theme-toggle {
    background: none;
    border: none;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-menu {
    flex: 1;
    padding: var(--space-lg) 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    text-align: left;
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-primary);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

/* ショートカットヒント */
.shortcuts-hint {
    padding: var(--space-lg) var(--space-lg);
    margin-top: var(--space-md);
    border-top: 1px solid var(--border-color);
}

.shortcuts-title {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.shortcut-item {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    padding: 2px 0;
    display: flex;
    align-items: center;
    gap: 4px;
}

.shortcut-item kbd {
    display: inline-block;
    padding: 1px 4px;
    font-size: 0.65rem;
    font-family: inherit;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header */
.top-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 50;
    height: 65px;
    flex-shrink: 0;
    box-sizing: border-box;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.breadcrumb {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* タスクビュー時はヘッダー右側のアクションを非表示 */
body.task-view-active .header-right {
    display: none;
}

/* タスクビューでheader-rightが非表示の時、header-leftが全幅を取るように */
body.task-view-active .header-left {
    flex: 1;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 300px;
    padding: var(--space-md);
    padding-right: 3rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.search-container i {
    position: absolute;
    right: var(--space-md);
    color: var(--text-tertiary);
}

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

.btn-primary {
    background: var(--color-primary);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-icon {
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
}

/* View Container */
.view-container {
    flex: 1;
    padding: var(--space-xl);
    overflow-y: auto;
    display: none;
}

.view-container.active {
    display: block;
}

/* ========================================
   ネイティブアプリ用スタイル
   ======================================== */

/* タスクビュー表示時、上部ヘッダーのタイトル（breadcrumb）を非表示 */
.native-app .task-view.active ~ .top-header .breadcrumb,
.native-app.task-view-active .top-header .breadcrumb {
    display: none !important;
}

/* または: タスクビュー表示時、top-header自体を非表示にする */
.native-app.task-view-active .top-header {
    display: none !important;
}

/* compact-project-headerを固定してスクロール時にタスクが上に見えないようにする */
.native-app .compact-project-header {
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    z-index: 100;
}

/* タブエリアも固定 */
.native-app .task-tabs {
    position: sticky;
    top: 80px;
    background: var(--bg-primary);
    z-index: 99;
}

/* サイドバーの調整 */
.native-app .sidebar-nav.open {
    width: 50%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    background: var(--bg-primary);
}