/* ================================================================
           HabitQuest — Design System (v2)
           ================================================================
           نظام تصميم موحّد قائم على المتغيرات (Design Tokens)، منظّم في
           طبقات: Settings → Reset → Layout → Components → Utilities → Media.
           جميع أصناف الـ HTML الأصلية محفوظة بدون تغيير (card, btn, habit-item...)
           حتى يعمل الملف كبديل مباشر لوسم <style> الحالي دون كسر أي جافاسكريبت
           يعتمد على أسماء تلك الأصناف.
           يدعم: Glassmorphism مع fallback، Dark/Light Mode، WCAG 2.1 AA،
           تباعد وخطوط موحّدة عبر متغيرات، وتعليقات توضيحية لكل قسم.
           ================================================================ */

        /* ================================================================
           SECTION 1: DESIGN TOKENS — المتغيرات العامة
           ================================================================ */

        :root {
            /* ---- 1.1 الخطوط ---- */
            --font-primary: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --font-arabic: 'Segoe UI', 'Arabic Typesetting', 'Traditional Arabic', Tahoma, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;

            /* ---- 1.2 أحجام الخط (Type Scale) ---- */
            --font-size-xs: 0.72rem;
            --font-size-sm: 0.8rem;
            --font-size-md: 0.9rem;
            --font-size-base: 0.95rem;
            --font-size-lg: 1.1rem;
            --font-size-xl: 1.2rem;
            --font-size-2xl: 1.3rem;
            --font-size-3xl: 2.2rem;
            --line-height-base: 1.5;

            /* ---- 1.3 نظام التباعد (Spacing Scale) ---- */
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --space-card-padding: var(--spacing-lg) var(--spacing-lg);
            --space-item-gap: var(--spacing-sm);
            --space-section-gap: var(--spacing-lg);

            /* ---- 1.4 الانحناءات (Radius) ---- */
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;

            /* ---- 1.5 الظلال (Elevation) ---- */
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.08);
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.1);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.16);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.22);
            --shadow-glow: 0 0 40px rgba(99, 200, 220, 0.35);

            /* ---- 1.6 الانتقالات (Motion) ---- */
            --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            --transition-theme: background-color 0.4s ease, color 0.4s ease,
                border-color 0.4s ease, box-shadow 0.4s ease;

            /* ---- 1.7 الزجاجية (Glassmorphism tokens) ---- */
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-border: rgba(255, 255, 255, 0.12);
            --glass-bg-light: rgba(255, 255, 255, 0.7);
            --glass-border-light: rgba(0, 0, 0, 0.08);
            --glass-blur: 20px;
            --glass-blur-strong: 24px;
            --glass-blur-soft: 16px;

            /* ---- 1.8 طبقات (Z-index) ---- */
            --z-sidebar: 10;
            --z-modal: 100;
            --z-toast: 200;
            --z-confetti: 300;
        }

        /* ================================================================
           SECTION 2: الثيمات — Dark / Light Mode
           ================================================================ */

        [data-theme="dark"] {
            --bg-primary: #0a0e17;
            --bg-secondary: #111620;
            --bg-tertiary: #181d28;
            --bg-card: #151a25;
            --bg-glass: rgba(22, 28, 40, 0.7);
            --bg-input: #1a1f2b;
            --text-primary: #e8ecf2;
            --text-secondary: #a0aab8;
            --text-tertiary: #6b7484;
            --accent: #5ec4d4;
            --accent-glow: rgba(94, 196, 212, 0.5);
            --accent2: #a78bfa;
            --accent3: #f59e4b;
            --accent4: #ef6b8c;
            --success: #34d399;
            --warning: #fbbf24;
            --danger: #f87171;
            --border: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.15);
            --xp-bar-bg: rgba(255, 255, 255, 0.06);
            --ring-bg: rgba(255, 255, 255, 0.07);
            --chart-grid: rgba(255, 255, 255, 0.05);
            --overlay: rgba(0, 0, 0, 0.6);
            --nav-bg: rgba(14, 18, 26, 0.85);
            --nav-border: rgba(255, 255, 255, 0.06);
            --icon-glow: var(--accent-glow);
            --glass-fallback-bg: #151c28;
            --nav-fallback-bg: #10141d;
        }

        [data-theme="light"] {
            --bg-primary: #f5f6f8;
            --bg-secondary: #ffffff;
            --bg-tertiary: #edf0f4;
            --bg-card: #ffffff;
            --bg-glass: rgba(255, 255, 255, 0.75);
            --bg-input: #f1f3f6;
            --text-primary: #1a1d24;
            --text-secondary: #5a6070;
            --text-tertiary: #8b92a0;
            --accent: #2d9daa;
            --accent-glow: rgba(45, 157, 170, 0.4);
            --accent2: #7c5ce7;
            --accent3: #e88a30;
            --accent4: #d94a6e;
            --success: #10b981;
            --warning: #e5a50a;
            --danger: #e85353;
            --border: rgba(0, 0, 0, 0.06);
            --border-strong: rgba(0, 0, 0, 0.12);
            --xp-bar-bg: rgba(0, 0, 0, 0.05);
            --ring-bg: rgba(0, 0, 0, 0.05);
            --chart-grid: rgba(0, 0, 0, 0.04);
            --overlay: rgba(0, 0, 0, 0.35);
            --nav-bg: rgba(255, 255, 255, 0.88);
            --nav-border: rgba(0, 0, 0, 0.06);
            --icon-glow: rgba(45, 157, 170, 0.3);
            --glass-fallback-bg: #ffffff;
            --nav-fallback-bg: #f8f9fb;
        }

        /* ================================================================
           SECTION 3: RESET / NORMALIZE — الأساسيات
           ================================================================ */

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

        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-primary);
            font-size: var(--font-size-md);
            line-height: var(--line-height-base);
            background: var(--bg-primary);
            color: var(--text-primary);
            min-height: 100vh;
            min-height: 100dvh;
            transition: var(--transition-theme);
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
        }

        [dir="rtl"] body {
            font-family: var(--font-arabic);
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        h3 {
            font-size: var(--font-size-xl);
            margin-bottom: var(--spacing-md);
        }
        p {
            color: var(--text-secondary);
        }
        button,
        input,
        select,
        textarea {
            font: inherit;
            color: inherit;
        }
        a {
            color: var(--accent);
            text-decoration: none;
        }

        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: transparent;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-strong);
            border-radius: var(--radius-full);
        }

        /* ================================================================
           SECTION 4: UTILITY MIX-IN CLASSES
           ================================================================ */

        .glass-surface {
            background: var(--glass-fallback-bg);
            border: 1px solid var(--border);
        }
        @supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
            .glass-surface {
                background: var(--bg-glass);
                backdrop-filter: blur(var(--glass-blur));
                -webkit-backdrop-filter: blur(var(--glass-blur));
            }
        }

        /* ================================================================
           SECTION 5: LAYOUT — التخطيط العام
           ================================================================ */

        .bg-ambient {
            position: fixed;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            overflow: hidden;
        }

        .bg-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(120px);
            opacity: 0.25;
            animation: orbFloat 18s ease-in-out infinite;
            will-change: transform;
        }
        .bg-orb:nth-child(1) {
            width: 500px;
            height: 500px;
            background: var(--accent);
            top: -15%;
            left: -10%;
            animation-delay: 0s;
        }
        .bg-orb:nth-child(2) {
            width: 400px;
            height: 400px;
            background: var(--accent2);
            bottom: -12%;
            right: -8%;
            animation-delay: -6s;
            animation-duration: 22s;
        }
        .bg-orb:nth-child(3) {
            width: 350px;
            height: 350px;
            background: var(--accent3);
            top: 40%;
            left: 55%;
            animation-delay: -10s;
            animation-duration: 20s;
        }

        @keyframes orbFloat {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            25% {
                transform: translate(60px, -40px) scale(1.08);
            }
            50% {
                transform: translate(-30px, 50px) scale(0.94);
            }
            75% {
                transform: translate(-50px, -30px) scale(1.05);
            }
        }

        .app-shell {
            position: relative;
            z-index: 1;
            display: flex;
            min-height: 100vh;
            min-height: 100dvh;
        }

        /* ---- 5.1 الشريط الجانبي (Sidebar) ---- */
        .sidebar {
            width: 260px;
            flex-shrink: 0;
            background: var(--nav-fallback-bg);
            border-right: 1px solid var(--nav-border);
            display: flex;
            flex-direction: column;
            padding: var(--spacing-lg) var(--spacing-md);
            position: sticky;
            top: 0;
            height: 100vh;
            height: 100dvh;
            z-index: var(--z-sidebar);
            transition: width 0.4s cubic-bezier(0.22, 1, 0.36, 1),
                background 0.3s ease,
                padding 0.3s ease;
            overflow: hidden;
        }
        @supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
            .sidebar {
                background: var(--nav-bg);
                backdrop-filter: blur(var(--glass-blur-strong));
                -webkit-backdrop-filter: blur(var(--glass-blur-strong));
            }
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: var(--spacing-sm) var(--spacing-md);
            margin-bottom: 28px;
            font-weight: 700;
            font-size: var(--font-size-2xl);
            letter-spacing: -0.02em;
            color: var(--accent);
        }

        .sidebar-nav {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }
        .sidebar-nav button {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: 12px var(--spacing-md);
            border: none;
            background: transparent;
            color: var(--text-secondary);
            border-radius: var(--radius-md);
            cursor: pointer;
            font-size: var(--font-size-md);
            font-family: inherit;
            transition: all var(--transition-fast);
            text-align: left;
            width: 100%;
            position: relative;
        }
        [dir="rtl"] .sidebar-nav button {
            text-align: right;
        }
        .sidebar-nav button:hover {
            background: var(--glass-bg);
            color: var(--text-primary);
        }
        .sidebar-nav button.active {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 16px var(--accent-glow);
        }
        .sidebar-nav button .nav-icon {
            font-size: var(--font-size-xl);
            flex-shrink: 0;
        }

        .sidebar-footer {
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        /* ---- وضع الشريط الجانبي المطوي ---- */
        .sidebar.collapsed {
            width: 70px;
            padding: var(--spacing-md) var(--spacing-sm);
        }
        .sidebar.collapsed .label-text {
            opacity: 0;
            transform: scale(0.8);
            width: 0;
            margin: 0;
            display: inline-block;
        }
        .sidebar.collapsed .sidebar-logo {
            justify-content: center;
        }
        .sidebar.collapsed .sidebar-nav button,
        .sidebar.collapsed .sidebar-footer .btn {
            justify-content: center;
            padding: 10px 0;
        }
        
        
        /* تحسين إخفاء النصوص */
        .sidebar .label-text {
            transition: opacity 0.25s ease, transform 0.25s ease, width 0.3s ease;
            white-space: nowrap;
            opacity: 1;
            transform: scale(1);
            width: auto;
            overflow: hidden;
        }

       
        /* ---- خاصية التوسيع عند تمرير الماوس (Hover) ---- */
        .sidebar.collapsed:hover {
            width: 260px !important;
        }

        .sidebar.collapsed:hover .label-text {
            opacity: 1 !important;
            transform: scale(1) !important;
            width: auto !important;
            margin-left: 8px;
        }

        .sidebar.collapsed:hover .sidebar-nav button {
            justify-content: flex-start;
            padding: 12px var(--spacing-md);
        }

        .sidebar.collapsed:hover .sidebar-logo {
            justify-content: flex-start;
        }

        .sidebar.collapsed:hover .sidebar-nav button:hover::after {
            display: none;
        }

        /* تلميح (tooltip) يظهر عند تمرير الفأرة في الوضع المطوي (عند عدم الهوفر) */
        /* تم تعديل هذه القاعدة لتطبيقها فقط على الأجهزة المزودة بفأرة (hover) */
        @media (hover: hover) {
            .sidebar.collapsed .sidebar-nav button:hover::after {
                content: attr(data-tooltip);
                position: absolute;
                left: 100%;
                top: 50%;
                transform: translateY(-50%);
                background: var(--bg-card);
                color: var(--text-primary);
                padding: var(--spacing-xs) 10px;
                border-radius: var(--radius-sm);
                font-size: var(--font-size-sm);
                white-space: nowrap;
                border: 1px solid var(--border);
                margin-left: var(--spacing-sm);
                z-index: 20;
            }
            .sidebar.collapsed:hover .sidebar-nav button:hover::after {
                display: none;
            }
        }

        /* ---- 5.2 المحتوى الرئيسي ---- */
        .main-content {
            flex: 1;
            padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-2xl);
            overflow-y: auto;
            max-height: 100vh;
            max-height: 100dvh;
        }

        .page {
            display: none;
            animation: fadeSlideIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .page.active {
            display: block;
        }
        @keyframes fadeSlideIn {
            from {
                opacity: 0;
                transform: translateY(16px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ---- 5.3 الشبكات (Grids) ---- */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-lg);
        }

        .shop-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 14px;
        }

        /* ================================================================
           SECTION 6: COMPONENTS — المكوّنات
           ================================================================ */

        /* ---- 6.1 البطاقات (Card) ---- */
        .card {
            background: var(--glass-fallback-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-card-padding);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        @supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
            .card {
                background: var(--bg-glass);
                backdrop-filter: blur(var(--glass-blur));
                -webkit-backdrop-filter: blur(var(--glass-blur));
            }
        }
        .card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-md);
        }

        .card-glow {
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, var(--accent-glow), transparent 70%);
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .card:hover .card-glow {
            opacity: 0.06;
        }

        /* ---- 6.2 بطاقات الإحصائيات (Stat Card) ---- */
        .stat-card {
            background: var(--glass-fallback-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md) var(--spacing-lg);
            text-align: center;
            transition: all var(--transition-smooth);
        }
        @supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
            .stat-card {
                background: var(--bg-glass);
                backdrop-filter: blur(var(--glass-blur));
                -webkit-backdrop-filter: blur(var(--glass-blur));
            }
        }
        .stat-card .stat-value {
            font-size: var(--font-size-3xl);
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-card .stat-label {
            font-size: var(--font-size-sm);
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-top: 2px;
        }

        /* ---- 6.3 قائمة العادات (Habit List / Item) ---- */
        .habit-list {
            display: flex;
            flex-direction: column;
            gap: var(--space-item-gap);
        }

        .habit-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px var(--spacing-lg);
            background: var(--glass-fallback-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-fast);
            position: relative;
            user-select: none;
        }
        @supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
            .habit-item {
                background: var(--bg-glass);
                backdrop-filter: blur(var(--glass-blur-soft));
                -webkit-backdrop-filter: blur(var(--glass-blur-soft));
            }
        }
        .habit-item:hover {
            border-color: var(--border-strong);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .habit-item:active {
            transform: scale(0.985);
            transition: transform 0.08s ease;
        }

        .habit-check {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--border-strong);
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-bounce);
            font-size: var(--font-size-md);
            background: transparent;
        }
        .habit-check.done {
            background: var(--success);
            border-color: var(--success);
            box-shadow: 0 0 18px rgba(52, 211, 153, 0.45);
        }

        .habit-info {
            flex: 1;
            min-width: 0;
        }
        .habit-name {
            font-weight: 600;
            font-size: var(--font-size-base);
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .habit-streak {
            font-size: var(--font-size-sm);
            color: var(--accent3);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .habit-actions {
            display: flex;
            gap: 6px;
            flex-shrink: 0;
        }

        /* ---- 6.4 الأزرار (Buttons) ---- */
        .btn-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: var(--bg-glass);
            cursor: pointer;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            color: var(--text-secondary);
            font-family: inherit;
        }
        .btn-icon:hover {
            background: var(--bg-tertiary);
            border-color: var(--border-strong);
            color: var(--text-primary);
        }
        .btn-icon.danger:hover {
            background: rgba(248, 113, 113, 0.15);
            border-color: var(--danger);
            color: var(--danger);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: 11px 20px;
            border-radius: var(--radius-full);
            border: none;
            font-family: inherit;
            font-weight: 600;
            font-size: var(--font-size-md);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px var(--accent-glow);
        }
        .btn-primary:hover {
            box-shadow: 0 6px 24px var(--accent-glow);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.96);
        }

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

        .btn-sm {
            padding: 7px 14px;
            font-size: var(--font-size-sm);
            border-radius: var(--radius-sm);
        }
        .btn-xs {
            padding: var(--spacing-xs) 10px;
            font-size: var(--font-size-xs);
            border-radius: var(--radius-sm);
            font-weight: 500;
        }

        #btnThemeToggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: var(--spacing-sm);
            border-radius: var(--radius-md);
            background: var(--bg-card);
            color: var(--text-primary);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        #btnThemeToggle:hover {
            background: var(--bg-tertiary);
        }

        /* ---- 6.5 النماذج (Forms) ---- */
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            display: block;
            font-size: var(--font-size-sm);
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 5px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-strong);
            background: var(--bg-input);
            color: var(--text-primary);
            font-family: inherit;
            font-size: var(--font-size-md);
            transition: all var(--transition-fast);
            resize: vertical;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-glow);
        }
        .form-group textarea {
            min-height: 60px;
        }

        /* ---- 6.6 النوافذ المنبثقة (Modal) ---- */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: var(--overlay);
            z-index: var(--z-modal);
            display: flex;
            align-items: center;
            justify-content: center;
            animation: fadeIn 0.2s ease;
            padding: 20px;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }

        .modal {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-xl);
            padding: 28px var(--spacing-lg);
            width: 100%;
            max-width: 480px;
            box-shadow: var(--shadow-lg);
            animation: modalPop 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            max-height: 85vh;
            overflow-y: auto;
        }
        @keyframes modalPop {
            from {
                transform: scale(0.9) translateY(20px);
                opacity: 0;
            }
            to {
                transform: scale(1) translateY(0);
                opacity: 1;
            }
        }
        .modal h3 {
            font-size: var(--font-size-xl);
            margin-bottom: var(--spacing-md);
            font-weight: 700;
        }

        /* ---- 6.7 الحلقات والمخططات (Ring / Chart) ---- */
        .ring-container {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .ring-container svg {
            transform: rotate(-90deg);
        }
        .ring-container .ring-value {
            position: absolute;
            font-weight: 700;
            font-size: var(--font-size-lg);
            color: var(--text-primary);
        }

        .chart-container {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .chart-container svg {
            min-width: 400px;
            width: 100%;
        }
        .bar-chart-bar {
            transition: all var(--transition-bounce);
            cursor: pointer;
        }
        .bar-chart-bar:hover {
            filter: brightness(1.3);
        }

        /* ---- 6.8 الإشعارات (Toast) ---- */
        .toast-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: var(--z-toast);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            pointer-events: none;
        }
        [dir="rtl"] .toast-container {
            right: auto;
            left: 20px;
        }

        .toast {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            box-shadow: var(--shadow-md);
            animation: toastIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            pointer-events: auto;
            font-size: var(--font-size-sm);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            backdrop-filter: blur(var(--glass-blur-soft));
            -webkit-backdrop-filter: blur(var(--glass-blur-soft));
        }
        @keyframes toastIn {
            from {
                transform: translateX(60px);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }
        [dir="rtl"] .toast {
            animation-name: toastInRtl;
        }
        @keyframes toastInRtl {
            from {
                transform: translateX(-60px);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        /* ---- 6.9 شارة المستوى وشريط الخبرة (Level Badge / XP Bar) ---- */
        .level-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent3), #e8c840);
            color: #1a1a1a;
            font-weight: 900;
            font-size: var(--font-size-lg);
            box-shadow: 0 0 24px rgba(245, 158, 75, 0.5);
            animation: levelPulse 2.5s ease-in-out infinite;
        }
        @keyframes levelPulse {
            0%,
            100% {
                box-shadow: 0 0 24px rgba(245, 158, 75, 0.5);
            }
            50% {
                box-shadow: 0 0 44px rgba(245, 158, 75, 0.85);
            }
        }

        .xp-bar-outer {
            height: 8px;
            border-radius: var(--radius-full);
            background: var(--xp-bar-bg);
            overflow: hidden;
            position: relative;
        }
        .xp-bar-inner {
            height: 100%;
            border-radius: var(--radius-full);
            background: linear-gradient(90deg, var(--accent), var(--accent2));
            transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
        }
        .xp-bar-inner::after {
            content: '';
            position: absolute;
            right: 0;
            top: 0;
            width: 20px;
            height: 100%;
            background: rgba(255, 255, 255, 0.4);
            border-radius: 50%;
            filter: blur(6px);
        }

        /* ---- 6.10 أزرار الأيام (Day Pills) ---- */
        .day-pills {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .day-pill {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border-strong);
            background: var(--bg-input);
            cursor: pointer;
            font-weight: 600;
            font-size: var(--font-size-sm);
            transition: all var(--transition-fast);
            color: var(--text-secondary);
            font-family: inherit;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .day-pill.selected {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            box-shadow: 0 2px 10px var(--accent-glow);
        }

        /* ---- 6.11 المتجر (Shop) ---- */
        .shop-item {
            background: var(--glass-fallback-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 18px;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        @supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
            .shop-item {
                background: var(--bg-glass);
                backdrop-filter: blur(var(--glass-blur-soft));
                -webkit-backdrop-filter: blur(var(--glass-blur-soft));
            }
        }
        .shop-item.redeemed {
            opacity: 0.55;
            filter: grayscale(30%);
        }
        .shop-item .shop-icon {
            font-size: 2.5rem;
            margin-bottom: var(--spacing-sm);
        }
        .shop-item .shop-cost {
            display: inline-block;
            background: var(--accent3);
            color: #1a1a1a;
            padding: var(--spacing-xs) 12px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: var(--font-size-sm);
            margin-top: var(--spacing-sm);
        }

        /* ---- 6.12 قصاصات الاحتفال (Confetti) ---- */
        .confetti-particle {
            position: fixed;
            pointer-events: none;
            z-index: var(--z-confetti);
            animation: confettiFall 1.8s ease-out forwards;
            font-size: 1.4rem;
        }
        @keyframes confettiFall {
            0% {
                transform: translateY(-40px) rotate(0deg) scale(1);
                opacity: 1;
            }
            70% {
                opacity: 1;
            }
            100% {
                transform: translateY(105vh) rotate(720deg) scale(0.3);
                opacity: 0;
            }
        }

        /* ================================================================
           SECTION 7: ICONS — أيقونات SVG
           ================================================================ */

        .icon-svg {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 1.2em;
            height: 1.2em;
            flex-shrink: 0;
            transition: all var(--transition-smooth);
        }
        .icon-svg svg {
            width: 100%;
            height: 100%;
            display: block;
            stroke: currentColor;
            fill: none;
            filter: drop-shadow(0 0 4px var(--icon-glow, transparent));
            transition: filter var(--transition-smooth), transform var(--transition-smooth);
        }
        .icon-svg.glow svg {
            filter: drop-shadow(0 0 12px var(--icon-glow));
        }
        .icon-svg.pulse svg {
            animation: iconPulse 2s ease-in-out infinite;
        }
        .icon-svg.rotate svg {
            animation: iconRotate 4s linear infinite;
        }
        .icon-svg.bounce svg {
            animation: iconBounce 1.2s ease-in-out infinite;
        }
        .icon-svg.flicker svg {
            animation: iconFlicker 1.8s ease-in-out infinite;
        }

        @keyframes iconPulse {
            0%,
            100% {
                transform: scale(1);
                filter: drop-shadow(0 0 6px var(--icon-glow));
            }
            50% {
                transform: scale(1.08);
                filter: drop-shadow(0 0 20px var(--icon-glow));
            }
        }
        @keyframes iconRotate {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }
        @keyframes iconBounce {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-4px);
            }
        }
        @keyframes iconFlicker {
            0%,
            100% {
                transform: scale(1) rotate(-2deg);
                filter: drop-shadow(0 0 12px var(--icon-glow));
            }
            25% {
                transform: scale(1.05) rotate(2deg);
                filter: drop-shadow(0 0 24px var(--icon-glow));
            }
            50% {
                transform: scale(0.95) rotate(-1deg);
                filter: drop-shadow(0 0 8px var(--icon-glow));
            }
            75% {
                transform: scale(1.02) rotate(1deg);
                filter: drop-shadow(0 0 18px var(--icon-glow));
            }
        }

        .logo-icon-svg {
            width: 2rem;
            height: 2rem;
        }
        .logo-icon-svg svg {
            filter: drop-shadow(0 0 16px var(--accent-glow));
            animation: iconPulse 3s ease-in-out infinite;
        }

        .habit-check .icon-svg svg {
            stroke: currentColor;
        }
        .habit-check.done .icon-svg svg {
            filter: drop-shadow(0 0 18px rgba(52, 211, 153, 0.6));
            animation: checkPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        @keyframes checkPop {
            0% {
                transform: scale(0.6);
            }
            50% {
                transform: scale(1.25);
            }
            100% {
                transform: scale(1);
            }
        }

        /* ================================================================
           SECTION 8: MEDIA QUERIES — التجاوب مع الأجهزة
           ================================================================ */

        @media (max-width: 768px) {
            .sidebar {
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                top: auto;
                width: 100% !important;
                height: auto;
                flex-direction: row;
                padding: var(--spacing-sm) 12px;
                border-right: none;
                border-top: 1px solid var(--nav-border);
                z-index: 50;
                border-radius: 20px 20px 0 0;
                gap: 0;
                justify-content: space-around;
                transition: none;
            }
            .sidebar-logo,
            .sidebar-footer {
                display: none;
            }
            .sidebar-nav {
                flex-direction: row;
                gap: 2px;
                flex: 1;
                justify-content: space-around;
            }
            .sidebar-nav button {
                flex-direction: column;
                gap: 2px;
                padding: var(--spacing-sm) 10px;
                font-size: 0.7rem;
                border-radius: var(--radius-sm);
                text-align: center;
            }
            .sidebar-nav button .nav-icon {
                font-size: 1.3rem;
            }
            .sidebar .label-text {
                opacity: 1 !important;
                transform: scale(1) !important;
                width: auto !important;
                margin: 0 !important;
                display: inline !important;
            }
            .sidebar.collapsed:hover {
                width: 100% !important;
            }
            .sidebar.collapsed .sidebar-nav button {
                justify-content: center;
                padding: 6px 10px;
            }
            #floatingToggleBtn {
                display: none !important;
            }

            .main-content {
                padding: var(--spacing-md) 12px 100px;
                max-height: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .card {
                padding: 14px var(--spacing-md);
            }
            .modal {
                max-width: 95vw;
                padding: 20px var(--spacing-md);
                border-radius: var(--radius-lg);
            }
        }

        @media (max-width: 400px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .stat-card .stat-value {
                font-size: 1.5rem;
            }
            .sidebar-nav button {
                padding: 6px 4px;
                font-size: 0.65rem;
                gap: 1px;
            }
            .sidebar-nav button .nav-icon {
                font-size: 1.1rem;
            }
        }

        /* ---- إمكانية الوصول: احترام تفضيل تقليل الحركة ---- */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.001ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.001ms !important;
                scroll-behavior: auto !important;
            }
        }

        /* ---- إمكانية الوصول: تباين أعلى عند طلب المستخدم ---- */
        @media (prefers-contrast: more) {
            :root {
                --border: var(--border-strong);
            }
            .btn-secondary,
            .form-group input,
            .form-group select,
            .form-group textarea {
                border-width: 2px;
            }
        }

        /* ---- تحسين التوافق مع المتصفحات التي لا تدعم backdrop-filter ---- */
        @supports not (backdrop-filter: blur(1px)) {
            .glass-surface {
                background: var(--glass-fallback-bg);
                border: 1px solid var(--border);
            }
            .card {
                background: var(--glass-fallback-bg);
            }
            .stat-card {
                background: var(--glass-fallback-bg);
            }
            .habit-item {
                background: var(--glass-fallback-bg);
            }
            .shop-item {
                background: var(--glass-fallback-bg);
            }
            .sidebar {
                background: var(--nav-fallback-bg);
            }
            .toast {
                background: var(--bg-card);
                backdrop-filter: none;
            }
            #floatingToggleBtn {
                backdrop-filter: none;
                background: var(--bg-card);
            }
        }

        /* ================================================================
           تحسينات القائمة الجانبية - Sidebar Enhancements (مدمجة)
           ================================================================ */

        /* الزر العائم */
        #floatingToggleBtn {
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 60;
            border-radius: var(--radius-full);
            padding: 8px 14px;
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            color: var(--text-primary);
            box-shadow: var(--shadow-md);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all var(--transition-smooth);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: var(--font-size-sm);
        }
        #floatingToggleBtn:hover {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        @media (max-width: 768px) {
            #floatingToggleBtn {
                display: none !important;
            }
        }