@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Educational Light Slate Theme */
    --bg-base: #a6b8c7; /* Light grayish blue background */
    --bg-surface: #ffffff; /* White panels mimicking paper/laptop */
    --bg-panel: rgba(255, 255, 255, 0.9);
    --text-main: #2c3e50; /* Dark slate text for readability */
    --text-muted: #5e6d7e;
    --accent-primary: #1e5a8f; /* Deep blue accent */
    --accent-secondary: #4a6a8a;
    --accent-success: #27ae60;
    --border-light: rgba(30, 90, 143, 0.15); /* Soft navy-slate border */
    --border-highlight: rgba(30, 90, 143, 0.3);
    --xray-bg: #ecf3f9;
    --transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-base);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background-color: rgba(0,0,0,0.2); border-radius: 10px; }
::-webkit-scrollbar-track { background: transparent; }

/* Header & Command Menu Toggle */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    width: 100%;
    z-index: 1000;
    flex-shrink: 0;
    min-height: 70px;
    background: var(--bg-base);
    border-bottom: 2px solid var(--border-light);
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.brand {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: #111111;
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.header-right {
    display: flex;
    align-items: center;
}

.mobile-only {
    display: none !important;
}

.app-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.65rem 2rem;
    background: #3e4f5f; /* Slightly lighter charcoal-blue */
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: #ffffff;
    text-transform: uppercase;
    flex-shrink: 0;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.footer-divider {
    width: 1px;
    height: 12px;
    background: var(--bg-base); /* Harmonic theme color for the divider */
    margin: 0 0.5rem;
    opacity: 0.6;
}

.footer-dot {
    width: 5px;
    height: 5px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.4;
}

@media (max-width: 1024px) {
    .mobile-only {
        display: block;
    }
}

.view-switcher {
    display: flex;
    background: rgba(0, 0, 0, 0.05);
    padding: 0.25rem;
    border-radius: 2rem;
    border: 1px solid var(--border-light);
}

.view-btn {
    padding: 0.5rem 1.25rem;
    border: none;
    background: transparent;
    border-radius: 1.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.view-btn.active {
    background: var(--bg-surface);
    color: var(--accent-primary);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.brand-logo {
    width: 32px;
    height: 32px;
    background: #111; /* Dark background to contrast the white logo */
    padding: 3px;
    border-radius: 50%;
    object-fit: contain;
    border: 1.5px solid rgba(255,255,255,0.15);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.menu-toggle {
    background: rgba(130, 170, 255, 0.1);
    border: 1px solid var(--border-highlight);
    color: var(--accent-primary);
    padding: 0.6rem 1.25rem;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    backdrop-filter: blur(5px);
}

.menu-toggle:hover {
    background: rgba(130, 170, 255, 0.2);
    box-shadow: 0 0 15px rgba(130, 170, 255, 0.2);
    transform: translateY(-1px);
}

.menu-toggle i {
    color: var(--accent-primary);
}

/* Fullscreen Menu Overlay */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.menu-container {
    background: #f1f4f9; /* Match unified slate gray */
    width: 400px;
    height: 100vh;
    border-right: 1px solid var(--border-light);
    box-shadow: 20px 0 50px rgba(0,0,0,0.5);
    overflow-y: auto;
    padding: 3rem 2.5rem;
    transform: translateX(-100%);
    transition: var(--transition);
    position: absolute;
    left: 0;
    top: 0;
}

.menu-container::before {
    content: 'Table of Contents';
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--accent-primary);
}

.sidebar-overlay.active .menu-container {
    transform: translateX(0);
}

.close-menu {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.close-menu:hover { color: var(--text-main); transform: rotate(90deg); }

.menu-category { margin-bottom: 2.5rem; }

.menu-category-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-primary);
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.menu-grid {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.menu-item {
    background: transparent;
    border: 1px solid transparent;
    padding: 0.85rem 1rem;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-muted);
}

.menu-item:hover {
    background: rgba(130, 170, 255, 0.05);
    color: var(--accent-primary);
    padding-left: 1.25rem;
}

.menu-item.active {
    background: rgba(130, 170, 255, 0.1);
    border-color: var(--border-highlight);
    color: var(--accent-primary);
    font-weight: 600;
}

/* Main Focus Layout */
.book-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
    padding: 2rem 4rem 1.5rem 4rem; /* Reduced bottom padding to use half height for copyright msg */
    gap: 4rem;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
}

.book-layout.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Theory Pane */
.theory-pane {
    flex: 1.2;
    overflow-y: auto;
    padding-right: 2rem;
    padding-left: 3rem; /* Expanded to fit 40px blur */
    margin-left: -3rem; /* Offset padding to keep visual alignment */
    position: relative;
}

.theory-header { margin-bottom: 2.5rem; }

.theory-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

/* Dashboard Complexity Pills */
.complexity-dashboard {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    background: #3e4f5f; /* Matches lighter footer background */
    padding: 1.25rem;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 
        0 10px 40px -10px rgba(0, 0, 0, 0.4),
        0 8px 15px -8px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255,255,255,0.05);
    margin: 0.5rem 0 2.5rem 0;
}

.comp-pill {
    flex: 1;
    min-width: 120px;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.comp-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.65); /* Improved contrast for darker background */
}

.comp-value {
    font-family: 'Fira Code', monospace;
    font-size: 1.15rem;
    font-weight: 600;
}

.comp-value.best-val { color: #2ecc71; }    /* Fixed Green */
.comp-value.avg-val { color: #3498db; }     /* Fixed Blue */
.comp-value.worst-val { color: #f07178; }   /* Fixed Reddish */
.comp-value.space-val { color: #a6b8c7; }   /* Harmonic Cyan/Slate */

.theory-content {
    font-size: 1.15rem;
    line-height: 1.85;
    color: var(--text-main);
}

.theory-content h2, .theory-content h3 {
    margin-top: 3.5rem;
    margin-bottom: 1.25rem;
    color: var(--text-main);
    font-weight: 700;
}

.theory-content h2 { 
    font-size: 2.2rem; 
    border-bottom: 2px solid var(--border-light); 
    padding-bottom: 0.75rem; 
    letter-spacing: -0.02em;
}

.theory-content h3 { 
    font-size: 1.5rem; 
    color: var(--accent-primary); 
    margin-top: 2.5rem;
}

.theory-content p { margin-bottom: 1.5rem; }
.theory-content ul, .theory-content ol { padding-left: 1.75rem; margin-bottom: 1.5rem; }
.theory-content li { margin-bottom: 0.75rem; }
.theory-content img { 
    max-width: 100%; 
    border-radius: 1.25rem; 
    margin: 2.5rem 0; 
    border: 1px solid var(--border-light);
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}
.theory-content table { width: 100%; border-collapse: collapse; margin: 2rem 0; border-radius: 12px; overflow: hidden; }
.theory-content th, .theory-content td { padding: 1rem; border: 1px solid var(--border-light); text-align: left; }
.theory-content th { background: rgba(30, 90, 143, 0.05); font-weight: 600; color: var(--accent-primary); }

.theory-content-inner p:last-child { margin-bottom: 0; }


.theory-content blockquote {
    border-left: 4px solid var(--accent-primary);
    padding: 1.25rem 1.75rem;
    background: rgba(30, 90, 143, 0.05);
    border-radius: 0 1rem 1rem 0;
    margin: 2rem 0;
    color: var(--text-main);
    position: relative;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}

/* Callout Styling */
.callout {
    margin: 2rem 0;
    padding: 1.25rem 1.75rem;
    border-radius: 1rem;
    border-left: 5px solid;
    position: relative;
    overflow: hidden;
}

.callout p { margin: 0; }
.callout-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem !important;
}

.callout-note { background: rgba(74, 85, 104, 0.08); border-color: #4a5568; color: #2d3748; }
.callout-note .callout-title { color: #4a5568; }

.callout-tip { background: rgba(39, 174, 96, 0.08); border-color: #27ae60; color: #1e7d43; }
.callout-tip .callout-title { color: #27ae60; }

.callout-important { background: rgba(155, 89, 182, 0.08); border-color: #9b59b6; color: #6d3e80; }
.callout-important .callout-title { color: #9b59b6; }

.callout-warning { background: rgba(243, 156, 18, 0.08); border-color: #f39c12; color: #a1640a; }
.callout-warning .callout-title { color: #f39c12; }

.callout-caution { background: rgba(231, 76, 60, 0.08); border-color: #e74c3c; color: #9a2b1e; }
.callout-caution .callout-title { color: #e74c3c; }

.theory-content hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-light), var(--accent-primary), var(--border-light), transparent);
    margin: 3rem 0;
    opacity: 0.6;
}

/* Code Pane & Sync Scrolling */
.code-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    max-width: 48%;
}

.code-box-wrapper {
    flex: 1;
    background: #282c34; /* Professional dark gray */
    border-radius: 1.25rem;
    border: 1px solid rgba(255,255,255,0.05);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.code-box-wrapper::before {
    display: none; /* Removed the old gradient highlight for a more authentic github look */
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: rgba(0,0,0,0.05);
    border-bottom: 1px solid var(--border-light);
}

.code-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.code-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 0.4rem;
    padding: 0.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.code-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--bg-surface);
}

.code-btn i {
    width: 16px;
    height: 16px;
}

.code-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.code-badge .status-dot {
    width: 8px; height: 8px; border-radius: 50%; 
    background: var(--accent-success);
    box-shadow: 0 0 8px var(--accent-success);
}

.sync-status {
    font-size: 0.75rem;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(130, 170, 255, 0.05);
    padding: 0.35rem 0.75rem;
    border-radius: 2rem;
    transition: var(--transition);
    opacity: 0.5;
}

.sync-status.active {
    background: rgba(130, 170, 255, 0.15);
    box-shadow: 0 0 10px rgba(130, 170, 255, 0.2);
    opacity: 1;
}

.code-box {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    position: relative;
    scroll-behavior: smooth;
}

pre {
    margin: 0 !important;
    background: transparent !important;
    text-shadow: none !important;
    font-family: 'Fira Code', monospace !important;
    font-size: 0.9rem !important;
    line-height: 1.6 !important;
    transition: font-size 0.2s ease !important;
}

/* Override PrismJS dark theme colors for the light Theory Pane */
.theory-content pre {
    margin: 2rem 0 !important;
    padding: 1rem 0;
}

.theory-content pre,
.theory-content pre code,
.theory-content pre[class*="language-"],
.theory-content code[class*="language-"] {
    color: var(--text-main) !important;
    text-shadow: none !important;
}

/* X-Ray Variables */
.xray-var {
    border-bottom: 2px solid var(--accent-primary);
    cursor: help;
    position: relative;
    transition: all 0.2s;
    color: #82aaff !important; /* Brighter blue for dark background */
    font-weight: 600;
}

.xray-var:hover {
    background: rgba(30, 90, 143, 0.1);
    border-radius: 4px;
}

.xray-var::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    background: var(--xray-bg);
    color: var(--text-main);
    padding: 0.6rem 0.8rem;
    border-radius: 0.5rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 400;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border: 1px solid var(--border-light);
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    z-index: 10;
}

.xray-var:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Responsive Design System */
@media (max-width: 1024px) {
    .mobile-only {
        display: flex !important;
    }

    .book-layout {
        flex: 1;
        flex-direction: column;
        padding: 0;
        gap: 0;
        overflow: hidden;
    }
    
    .theory-pane, .code-pane {
        width: 100%;
        max-width: 100%;
        height: 100%;
        padding: 1.5rem 1.5rem 2rem 1.5rem; /* Reduced for footer visibility */
        margin: 0;
        flex: 1;
        overflow-y: auto;
        display: none;
    }

    /* Active view display */
    .book-layout.show-theory .theory-pane {
        display: block;
    }

    .book-layout.show-code .code-pane {
        display: block;
        padding: 0;
    }

    .code-box-wrapper {
        height: 100%;
        border-radius: 0;
        border: none;
        box-shadow: none;
    }

    .code-box {
        height: 100%;
        padding-bottom: 5rem; /* Extra spacing for mobile */
    }

    .home-canvas-container {
        height: 100%;
        border-radius: 0;
        border: none;
    }
}

@media (max-width: 600px) {
    header {
        padding: 0.75rem 1rem;
    }

    .brand-title {
        display: none; /* Hide title on very small screens to make room for switcher */
    }

    @media (min-width: 480px) {
        .brand-title {
            display: block; /* Show title on larger mobiles */
            font-size: 0.9rem;
        }
    }

    .brand {
        gap: 0.5rem;
    }

    .menu-toggle span {
        display: none; /* Only show icon on mobile to save space */
    }

    @media (min-width: 400px) {
        .menu-toggle span {
            display: inline-block;
        }
    }

    .menu-toggle {
        padding: 0.6rem;
    }

    .theory-title {
        font-size: 2rem;
    }

    .menu-container {
        width: 100%;
        padding: 2rem 1.5rem;
    }

    .complexity-dashboard {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
}

/* Home Dashboard Styles */
.home-hero {
    padding: 3rem 0;
    text-align: center;
}

.home-poster {
    width: 100%;
    max-width: 800px;
    border-radius: 1.5rem;
    box-shadow: 0 30px 60px rgba(0,0,0,0.25);
    margin-bottom: 3rem;
    border: 1px solid rgba(0,0,0,0.1);
}

.home-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.home-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.home-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(30,90,143,0.1);
    border-color: var(--accent-primary);
}

.feature-card h3 {
    color: var(--accent-primary);
    margin-bottom: 0.75rem;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.code-placeholder-view {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
    color: rgba(255,255,255,0.3);
}

.code-placeholder-view i {
    margin-bottom: 1.5rem;
    opacity: 0.2;
}

.code-placeholder-view h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: rgba(255,255,255,0.8);
}

.code-placeholder-view p {
    font-size: 1rem;
    max-width: 300px;
    line-height: 1.6;
}

.menu-item.home-btn {
    background: #1e5a8f; /* Dark Navy Blue */
    color: white;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    border: none; /* Removed borders to eliminate jagged pixel issues */
}

.menu-item.home-btn:hover {
    background: #15436c; /* Slightly darker navy */
    color: white;
}

.menu-item.home-btn.active, .menu-item.home-btn:active {
    background: #111111 !important; /* Pure Black on click/active */
    box-shadow: inset 0 0 15px rgba(255,255,255,0.05); /* Soft inner glow for elegant feel */
}

.menu-footer {
    margin-top: 3rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.menu-footer span {
    color: var(--accent-primary);
    font-weight: 700;
}

/* Full Focus Mode for Practice Sessions */
.book-layout.full-focus {
    padding: 2rem 15% 3rem 15% !important; 
    gap: 0;
}

.book-layout.full-focus .theory-pane {
    flex: 1 !important;
    max-width: 100% !important;
    padding-right: 0 !important;
}

.book-layout.full-focus .code-pane {
    display: none !important;
}

@media (max-width: 1200px) {
    .book-layout.full-focus {
        padding: 2rem 5% 3rem 5% !important;
    }
}

/* =============================================
   COMMAND PALETTE (Cmd+K / Ctrl+K)
   ============================================= */
.cmd-palette-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(6px);
    z-index: 9000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 10vh;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.cmd-palette-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.cmd-palette-box {
    width: 100%;
    max-width: 640px;
    background: #ffffff;
    border-radius: 1.25rem;
    border: 1px solid var(--border-highlight);
    box-shadow: 0 30px 80px rgba(0,0,0,0.35), 0 0 0 1px rgba(30,90,143,0.1);
    overflow: hidden;
    transform: translateY(-12px) scale(0.98);
    transition: transform 0.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.cmd-palette-overlay.active .cmd-palette-box {
    transform: translateY(0) scale(1);
}

.cmd-palette-input-wrap {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1.1rem 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.cmd-palette-input-wrap svg {
    color: var(--accent-primary);
    flex-shrink: 0;
    opacity: 0.7;
}

.cmd-palette-input {
    flex: 1;
    border: none;
    outline: none;
    font-family: 'Inter', sans-serif;
    font-size: 1.05rem;
    color: var(--text-main);
    background: transparent;
    caret-color: var(--accent-primary);
}

.cmd-palette-input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.cmd-kbd {
    font-family: 'Fira Code', monospace;
    font-size: 0.7rem;
    background: #f0f4f8;
    color: var(--text-muted);
    border: 1px solid var(--border-light);
    border-radius: 5px;
    padding: 0.2rem 0.5rem;
    letter-spacing: 0.04em;
}

.cmd-palette-results {
    max-height: 360px;
    overflow-y: auto;
    padding: 0.5rem;
}

.cmd-palette-empty {
    text-align: center;
    padding: 2.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.cmd-result-category {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-primary);
    padding: 0.75rem 1rem 0.3rem;
    font-weight: 700;
    opacity: 0.7;
}

.cmd-result-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.75rem 1rem;
    border-radius: 0.65rem;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    font-size: 0.95rem;
    color: var(--text-main);
    font-weight: 500;
}

.cmd-result-item:hover,
.cmd-result-item.focused {
    background: rgba(30, 90, 143, 0.08);
    color: var(--accent-primary);
}

.cmd-result-item svg {
    flex-shrink: 0;
    opacity: 0.5;
}

.cmd-result-item.focused svg {
    opacity: 0.85;
}

.cmd-result-item .cmd-result-cat-tag {
    margin-left: auto;
    font-size: 0.72rem;
    color: var(--text-muted);
    opacity: 0.75;
    background: #f0f4f8;
    padding: 0.15rem 0.5rem;
    border-radius: 99px;
}

.cmd-result-item .cmd-result-check {
    margin-left: 0.25rem;
    color: #27ae60;
    flex-shrink: 0;
    opacity: 0;
}

.cmd-result-item.is-done .cmd-result-check {
    opacity: 1;
}

.cmd-palette-footer {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 0.65rem 1.5rem;
    border-top: 1px solid var(--border-light);
    background: #f8fafc;
}

.cmd-palette-footer-hint {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* =============================================
   PROGRESS TRACKING — Sidebar Checkmarks
   ============================================= */
.menu-item .progress-check {
    margin-left: auto;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    background: transparent;
}

.menu-item.completed .progress-check {
    background: #27ae60;
    border-color: #27ae60;
}

.menu-item.completed .progress-check::after {
    content: '';
    width: 5px;
    height: 9px;
    border: 2px solid white;
    border-top: none;
    border-left: none;
    transform: rotate(45deg) translateY(-1px);
    display: block;
}

.menu-item {
    display: flex;
    align-items: center;
}

/* Category progress ring */
.menu-category-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.category-progress-ring {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.category-progress-ring circle {
    transition: stroke-dashoffset 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

/* =============================================
   MARK AS COMPLETED BUTTON
   ============================================= */
.mark-complete-wrap {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mark-complete-btn {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    border: 2px solid var(--border-highlight);
    background: transparent;
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
}

.mark-complete-btn:hover {
    border-color: #27ae60;
    color: #27ae60;
    background: rgba(39, 174, 96, 0.06);
    transform: translateY(-1px);
}

.mark-complete-btn.is-done {
    background: #27ae60;
    border-color: #27ae60;
    color: white;
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.mark-complete-btn .btn-icon-circle {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid currentColor;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s;
    flex-shrink: 0;
}

.mark-complete-btn.is-done .btn-icon-circle {
    border-color: white;
    background: rgba(255,255,255,0.2);
}

.mark-complete-btn .btn-icon-circle::after {
    content: '';
    width: 4px;
    height: 8px;
    border: 2px solid currentColor;
    border-top: none;
    border-left: none;
    transform: rotate(45deg) translateY(-1px);
    display: none;
}

.mark-complete-btn.is-done .btn-icon-circle::after {
    display: block;
    border-color: white;
}

.mark-complete-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    opacity: 0.7;
}

/* =============================================
   TOAST NOTIFICATION
   ============================================= */
.app-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #2c3e50;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.app-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* =============================================
   KEYBOARD SHORTCUT HINT IN HEADER (desktop)
   ============================================= */
.cmd-palette-trigger {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(30, 90, 143, 0.06);
    border: 1px solid var(--border-light);
    border-radius: 0.65rem;
    padding: 0.45rem 0.9rem;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
    transition: all 0.2s ease;
}

.cmd-palette-trigger:hover {
    background: rgba(30, 90, 143, 0.12);
    border-color: var(--border-highlight);
    color: var(--accent-primary);
}

.cmd-palette-trigger .cmd-kbd {
    background: rgba(0,0,0,0.06);
}

@media (max-width: 600px) {
    .cmd-palette-trigger { display: none; }
    .cmd-palette-box { max-width: 95vw; margin: 0 0.5rem; }
}