:root {
    /* Primitive Color Tokens */
    --color-white: rgba(255, 255, 255, 1);
    --color-black: rgba(0, 0, 0, 1);
    --color-cream-50: rgba(252, 252, 249, 1);
    --color-cream-100: rgba(255, 255, 253, 1);
    --color-gray-200: rgba(245, 245, 245, 1);
    --color-gray-300: rgba(167, 169, 169, 1);
    --color-gray-400: rgba(119, 124, 124, 1);
    --color-slate-500: rgba(98, 108, 113, 1);
    --color-brown-600: rgba(94, 82, 64, 1);
    --color-charcoal-700: rgba(31, 33, 33, 1);
    --color-charcoal-800: rgba(38, 40, 40, 1);
    --color-slate-900: rgba(19, 52, 59, 1);
    --color-teal-300: rgba(50, 184, 198, 1);
    --color-teal-400: rgba(45, 166, 178, 1);
    --color-teal-500: rgba(33, 128, 141, 1);
    --color-teal-600: rgba(29, 116, 128, 1);
    --color-teal-700: rgba(26, 104, 115, 1);
    --color-teal-800: rgba(41, 150, 161, 1);
    --color-red-400: rgba(255, 84, 89, 1);
    --color-red-500: rgba(192, 21, 47, 1);
    --color-orange-400: rgba(230, 129, 97, 1);
    --color-orange-500: rgba(168, 75, 47, 1);

    /* Light mode colors */
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --card-bg: #ffffff;
    --sidebar-bg: #fafbfc;
    --text-color: #1a202c;
    --text-secondary: #6b7280;
    --border-color: rgba(0, 0, 0, 0.1);
    --input-bg: #f9fafb;
    --hover-bg: rgba(102, 126, 234, 0.08);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);

    /* Background color tokens */
    --color-bg-1: rgba(59, 130, 246, 0.08);
    --color-bg-2: rgba(245, 158, 11, 0.08);
    --color-bg-3: rgba(34, 197, 94, 0.08);
    --color-bg-4: rgba(239, 68, 68, 0.08);
    --color-bg-5: rgba(147, 51, 234, 0.08);
    --color-bg-6: rgba(249, 115, 22, 0.08);
    --color-bg-7: rgba(236, 72, 153, 0.08);
    --color-bg-8: rgba(6, 182, 212, 0.08);

    /* Semantic colors */
    --color-background: var(--color-cream-50);
    --color-surface: var(--color-cream-100);
    --color-text: var(--color-slate-900);
    --color-text-secondary: var(--color-slate-500);
    --color-primary: var(--color-teal-500);
    --color-primary-hover: var(--color-teal-600);
    --color-border: rgba(94, 82, 64, 0.2);

    /* Typography */
    --font-family-base: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;

    /* Spacing */
    --space-2: 2px;
    --space-4: 4px;
    --space-6: 6px;
    --space-8: 8px;
    --space-12: 12px;
    --space-16: 16px;
    --space-20: 20px;
    --space-24: 24px;
    --space-32: 32px;
    --space-48: 48px;
    --space-64: 64px;

    /* Border radius */
    --radius-sm: 6px;
    --radius-base: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Morphism shadows */
    --shadow-morphism: 8px 8px 16px rgba(0, 0, 0, 0.1), -8px -8px 16px rgba(255, 255, 255, 0.7);
    --shadow-inset: inset 4px 4px 8px rgba(0, 0, 0, 0.1), inset -4px -4px 8px rgba(255, 255, 255, 0.7);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.1);

    /* Scrollbar variables (centralized) */
    --scrollbar-width: 10px;
    --scrollbar-track: transparent;
    --scrollbar-thumb: rgba(16,24,40,0.08);
    --scrollbar-thumb-hover: rgba(16,24,40,0.16);
    --scrollbar-thumb-dark: rgba(255,255,255,0.08);
    --scrollbar-thumb-dark-hover: rgba(255,255,255,0.16);
    --scrollbar-radius: 999px;
}

.dark-mode {
    /* Dark mode colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --card-bg: #1e293b;
    --sidebar-bg: #1a2332;
    --text-color: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --input-bg: #0f172a;
    --hover-bg: rgba(102, 126, 234, 0.15);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);

    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-border: rgba(119, 124, 124, 0.3);
    --shadow-morphism: 8px 8px 16px rgba(0, 0, 0, 0.3), -8px -8px 16px rgba(255, 255, 255, 0.05);
    --shadow-inset: inset 4px 4px 8px rgba(0, 0, 0, 0.3), inset -4px -4px 8px rgba(255, 255, 255, 0.05);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --card-bg: #1e293b;
        --sidebar-bg: #1a2332;
        --text-color: #f1f5f9;
        --text-secondary: #94a3b8;
        --border-color: rgba(255, 255, 255, 0.1);
        --input-bg: #0f172a;
        --hover-bg: rgba(102, 126, 234, 0.15);
        --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);

        --color-background: var(--color-charcoal-700);
        --color-surface: var(--color-charcoal-800);
        --color-text: var(--color-gray-200);
        --color-text-secondary: rgba(167, 169, 169, 0.7);
        --color-primary: var(--color-teal-300);
        --color-primary-hover: var(--color-teal-400);
        --color-border: rgba(119, 124, 124, 0.3);
        --shadow-morphism: 8px 8px 16px rgba(0, 0, 0, 0.3), -8px -8px 16px rgba(255, 255, 255, 0.05);
        --shadow-inset: inset 4px 4px 8px rgba(0, 0, 0, 0.3), inset -4px -4px 8px rgba(255, 255, 255, 0.05);
    }

    /* ISSUE 2 FIX: Filter text color in dark mode */
    .filter-button {
        color: #ffffff !important;
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease;
    scrollbar-width: thin; /* Firefox */
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

body {
    font-family: var(--font-family-base);
    background: var(--bg-primary);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(50, 184, 198, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(147, 51, 234, 0.05) 0%, transparent 50%);
    transition: background 0.3s ease, color 0.3s ease;
}



/* Apply Variables to ALL Elements */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0;
}

.left-sidebar,
.right-sidebar {
    background: var(--sidebar-bg);
    border-color: var(--border-color);
}

.main-content {
    background: var(--bg-primary);
}

/* CRITICAL FIX: Card container backgrounds for dark mode */
.card,
.pattern-card,
.topic-card,
.card-header,
.card-body,
.card-content,
.pattern-header {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
    transition: all 0.3s ease;
}

/* Dark mode explicit overrides for stubborn card elements */
.dark-mode .card,
.dark-mode .pattern-card,
.dark-mode .topic-card,
.dark-mode .card-header,
.dark-mode .card-body,
.dark-mode .card-content,
.dark-mode .pattern-header {
    background: #1e293b !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
    color: #f1f5f9 !important;
}

@media (prefers-color-scheme: dark) {

    .card,
    .pattern-card,
    .topic-card,
    .card-header,
    .card-body,
    .card-content,
    .pattern-header {
        background: #1e293b !important;
        border-color: rgba(255, 255, 255, 0.1) !important;
        color: #f1f5f9 !important;
    }
}

input,
select,
.dropdown-selected,
.dropdown-menu {
    background: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
}

.dropdown-search input {
    background: var(--input-bg);
}

.toggle-cards-btn,
button {
    color: var(--text-color);
    border-color: var(--border-color);
}

h1,
h2,
h3,
h4,
h5,
h6,
.section-title,
.topic-name,
.problem-name {
    color: var(--text-color);
}

.filter-label,
.stat-label,
.text-secondary {
    color: var(--text-secondary);
}

.topic-item:hover,
.dropdown-option:hover {
    background: var(--hover-bg);
}

.progress-bar {
    background: var(--border-color);
}

.video-modal,
.modal-overlay {
    background: rgba(0, 0, 0, 0.8);
}

.video-modal-content,
.modal-content {
    background: var(--card-bg);
    color: var(--text-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    max-width: 1920px;
    margin: 0 auto;
}

.nav-brand h1 {
    font-size: 1.5rem;
    margin: 0;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-content {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-stats {
    display: flex;
    gap: 20px;
}

.stat-item {
    font-size: 0.9rem;
}

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.theme-toggle,
.profile-btn {
    padding: 8px;
    border: none;
    background: var(--color-surface);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-text);
}

.theme-toggle:hover,
.profile-btn:hover {
    background: var(--color-secondary);
    transform: scale(1.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(45deg, var(--color-primary), var(--color-teal-400));
    border-radius: var(--radius-base);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: var(--space-32);
    list-style: none;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--color-primary);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--color-primary), var(--color-teal-300));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    cursor: pointer;
}

/* Responsive Layout */
.app-container {
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    grid-template-areas: "left-sidebar main-content right-sidebar";
    gap: 0;
    min-height: calc(100vh - 64px);
}

/* Sticky Sidebars */
.left-sidebar {
    grid-area: left-sidebar;
    background: var(--sidebar-bg);
    padding: 24px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 64px;
    align-self: flex-start;
    height: calc(100vh - 64px);
    overflow-y: auto;
    /* padding-bottom: 10; */
}

.main-content {
    grid-area: main-content;
    padding: 24px;
    overflow-y: visible;
    display: flex;
    flex-direction: column;
    gap: var(--space-24);
}

.right-sidebar {
    grid-area: right-sidebar;
    background: var(--color-surface);
    padding: 24px;
    border-left: 1px solid var(--color-border);
    position: sticky;
    top: 64px;
    align-self: flex-start;
    height: calc(100vh - 64px);
    overflow-y: auto;
}

/* Mobile sidebar toggle buttons */
.sidebar-toggle-left,
.sidebar-toggle-right {
    display: none;
    position: fixed;
    bottom: 24px;
    z-index: 95;
    padding: 12px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.sidebar-toggle-left {
    left: 24px;
}

.sidebar-toggle-right {
    right: 24px;
}

.sidebar-toggle-left:hover,
.sidebar-toggle-right:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* Combined Topic Progress + Filter Styles */
.topics-section {
    margin-bottom: 0;
    display: flex;
    flex-direction: column;
    max-height: 60vh; /* 65% of viewport */
}

.section-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    padding: 0 4px;
    flex-shrink: 0;
    /* Prevent title from scrolling */
}

/* Topic List - Scrollable */
.topic-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    overflow-x: hidden;
    max-height: calc(60vh - 40px);
    padding-right: 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
    scroll-behavior: smooth;
    /* Smooth scroll behavior */
}

/* Webkit Scrollbar Styling (Chrome, Safari, Edge) */
*::-webkit-scrollbar {
    width: 6px;
}

*::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 3px;
}

*::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
    transition: background 0.3s ease;
}

*::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}

/* Dark mode scrollbar */
.dark-mode *::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

.dark-mode *::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

@media (prefers-color-scheme: dark) {
    *::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.2);
    }

    *::-webkit-scrollbar-thumb:hover {
        background: rgba(255, 255, 255, 0.3);
    }
}

.topic-item {
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.topic-item:hover {
    background: var(--color-bg-1);
    border-color: var(--color-primary);
}

.topic-item.active {
    background: var(--color-bg-1);
    border-left: 4px solid var(--color-primary);
}

.topic-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.topic-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
}

.topic-progress {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-teal-400) 100%);
    transition: width 0.3s ease;
}



.badges-mini {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.badge-mini {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-bg-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 0.2s ease;
}

.badge-mini.earned {
    background: linear-gradient(45deg, var(--color-primary), var(--color-teal-400));
}

.streak-display {
    text-align: center;
    padding: 16px;
    background: var(--color-bg-3);
    border-radius: 8px;
}

.streak-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
}

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

.hero {
    text-align: center;
    margin-bottom: var(--space-64);
}

.hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-16);
    background: linear-gradient(45deg, var(--color-primary), var(--color-teal-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-32);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-16) var(--space-32);
    background: linear-gradient(45deg, var(--color-primary), var(--color-teal-400));
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-glass);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glass), 0 4px 20px rgba(33, 128, 141, 0.3);
}

/* Filters */
.filters {
    display: flex;
    gap: var(--space-16);
    margin-bottom: var(--space-32);
    flex-wrap: wrap;
    justify-content: center;
}

.filter-button {
    padding: var(--space-8) var(--space-20);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-morphism);
}

.filter-button:hover,
.filter-button.active {
    background: var(--color-primary);
    color: white;
    transform: translateY(-1px);
}

/* Pattern grid */
.patterns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-24);
    grid-auto-rows: auto;
    align-items: start;
}

/* Pattern card */
.pattern-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    box-shadow: var(--shadow-morphism);
    transition: all 0.3s ease, transform 0.3s ease, grid-column 0.3s ease;
    cursor: pointer;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Expanded card takes full width - only in "All Patterns" view */
.pattern-card.expanded-full-width {
    grid-column: 1 / -1;
    max-width: calc(100% - (var(--space-32) * 2));
    margin: 0 auto;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glass), 0 16px 48px rgba(0, 0, 0, 0.2);
    border: 2px solid var(--color-primary);
    background: rgba(255, 255, 255, 0.95);
    z-index: 10;
    position: relative;
}

/* Dark mode expanded card styling */
body.dark-mode .pattern-card.expanded-full-width {
    background: rgba(38, 40, 40, 0.95);
    box-shadow: var(--shadow-glass), 0 16px 48px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
    .pattern-card.expanded-full-width {
        background: rgba(38, 40, 40, 0.95);
        box-shadow: var(--shadow-glass), 0 16px 48px rgba(0, 0, 0, 0.4);
    }
}

/* Collapsed card normal size */
.pattern-card.collapsed {
    grid-column: span 1;
}

/* Enhanced expand icon animation */
.pattern-card.expanded-full-width .expand-icon {
    transform: rotate(45deg);
    background: var(--color-primary);
    color: white;
}

.pattern-card:hover:not(.expanded-full-width) {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glass), 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* Hover effect for expanded full-width cards */
.pattern-card.expanded-full-width:hover {
    box-shadow: var(--shadow-glass), 0 20px 56px rgba(0, 0, 0, 0.25);
}

.pattern-card.expanded {
    background: rgba(255, 255, 255, 0.9);
}

body.dark-mode .pattern-card.expanded {
    background: rgba(38, 40, 40, 0.9);
}

@media (prefers-color-scheme: dark) {
    .pattern-card.expanded {
        background: rgba(38, 40, 40, 0.9);
    }
}

.status-indicator {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.pattern-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-16);
}

.pattern-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-base);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    margin-right: var(--space-12);
}

.pattern-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.pattern-count {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.expand-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-bg-1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.pattern-card.expanded .expand-icon {
    transform: rotate(45deg);
}

.pattern-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-16);
    font-size: var(--font-size-sm);
}

.problems-list {
    display: none;
    gap: var(--space-8);
    flex-direction: column;
    background: var(--card-bg);
    color: var(--text-color);
    border-top: 1px solid var(--border-color);
    padding: var(--space-16);
}

.pattern-card.expanded .problems-list {
    display: flex;
}

.problem-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-12) var(--space-16);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-base);
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
    margin-bottom: var(--space-8);
}

body.dark-mode .problem-item {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}

@media (prefers-color-scheme: dark) {
    .problem-item {
        background: var(--card-bg);
        border-color: var(--border-color);
        color: var(--text-color);
    }
}

.problem-item:hover {
    transform: translateX(4px);
    background: var(--hover-bg);
}

body.dark-mode .problem-item:hover {
    background: var(--hover-bg) !important;
}

@media (prefers-color-scheme: dark) {
    .problem-item:hover {
        background: var(--hover-bg);
    }
}

.problem-name {
    font-weight: 500;
    color: var(--text-color);
}

.difficulty {
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.difficulty.easy {
    background: rgba(34, 197, 94, 0.2);
    color: rgb(22, 163, 74);
}

.difficulty.medium {
    background: rgba(245, 158, 11, 0.2);
    color: rgb(217, 119, 6);
}

.difficulty.hard {
    background: rgba(239, 68, 68, 0.2);
    color: rgb(220, 38, 38);
}

.problem-link {
    padding: var(--space-6) var(--space-12);
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    transition: all 0.2s ease;
}

.problem-link:hover {
    background: var(--color-primary-hover);
    transform: scale(1.05);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(10px);
}

.modal.active {
    display: flex;
}

/* Video Modal Specific Styles */
.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    /* 16:9 aspect ratio */
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 20px;
}

.video-modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--color-text);
}

.close-btn {
    background: transparent;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-text);
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.close-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

body.dark-mode .close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: dark) {
    .close-btn:hover {
        background: rgba(255, 255, 255, 0.1);
    }
}

/* Dark mode support for responsive elements */
body.dark-mode .navbar {
    background: var(--color-charcoal-800);
}

body.dark-mode .nav-content {
    background: var(--color-charcoal-800);
}

body.dark-mode .sidebar-toggle-left,
body.dark-mode .sidebar-toggle-right {
    background: var(--color-teal-300);
}

body.dark-mode .mobile-menu-toggle span {
    background: var(--color-gray-200);
}

@media (prefers-color-scheme: dark) {
    .navbar {
        background: var(--color-charcoal-800);
    }

    .nav-content {
        background: var(--color-charcoal-800);
    }

    .sidebar-toggle-left,
    .sidebar-toggle-right {
        background: var(--color-teal-300);
    }

    .mobile-menu-toggle span {
        background: var(--color-gray-200);
    }
}

.video-footer {
    margin-top: 20px;
    text-align: center;
    padding: 0 20px 20px;
}

.youtube-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #ff0000;
    text-decoration: none;
    font-weight: 500;
    padding: 10px 20px;
    border: 2px solid #ff0000;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.youtube-link:hover {
    background: #ff0000;
    color: white;
}

.video-error {
    text-align: center;
    padding: 40px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    margin: 20px;
}

body.dark-mode .video-error {
    background: rgba(255, 255, 255, 0.05);
}

@media (prefers-color-scheme: dark) {
    .video-error {
        background: rgba(255, 255, 255, 0.05);
    }
}

.youtube-link-large {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #ff0000;
    color: white;
    text-decoration: none;
    font-weight: 600;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.youtube-link-large:hover {
    background: #cc0000;
    transform: scale(1.05);
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-32);
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-24);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.close-button {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-bg-4);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.close-button:hover {
    transform: scale(1.1);
}

.modal-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-24);
    line-height: 1.6;
}

.modal-actions {
    display: flex;
    gap: var(--space-12);
    justify-content: flex-end;
}

.btn {
    padding: var(--space-12) var(--space-20);
    border: none;
    border-radius: var(--radius-base);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.btn-secondary {
    background: var(--color-bg-1);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: var(--color-bg-2);
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-32) 0;
    text-align: center;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-24);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-16);
    flex-wrap: wrap;
    gap: var(--space-16);
}

.footer-links {
    display: flex;
    gap: var(--space-24);
    list-style: none;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* Progress tracking styles */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-bg-2);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin: var(--space-8) 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-teal-400));
    border-radius: var(--radius-sm);
    transition: width 0.3s ease;
}

.roadmap-selector {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.roadmap-option {
    padding: var(--space-12);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--color-surface);
}

.roadmap-option:hover,
.roadmap-option.active {
    background: var(--color-bg-1);
    border-color: var(--color-primary);
}

.calendar-heatmap {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    margin: var(--space-16) 0;
    max-width: 100%;
    overflow: hidden;
}

.heatmap-month {
    margin-bottom: var(--space-12);
}

.heatmap-month-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    text-align: center;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

.calendar-day {
    width: 14px;
    height: 14px;
    border-radius: 2px;
    background: var(--color-bg-2);
    cursor: pointer;
    transition: all 0.2s ease;
}

@media (max-width: 768px) {
    .calendar-day {
        width: 10px;
        height: 10px;
    }
}

.calendar-day.active-1 {
    background: rgba(33, 128, 141, 0.3);
}

.calendar-day.active-2 {
    background: rgba(33, 128, 141, 0.5);
}

.calendar-day.active-3 {
    background: rgba(33, 128, 141, 0.7);
}

.calendar-day.active-4 {
    background: rgba(33, 128, 141, 1);
}

/* Modern Achievement Icons with Gradient Backgrounds */
.achievement-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.achievement-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.achievement-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 2px;
}

.achievement-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Locked achievements */
.achievement-item.locked {
    opacity: 0.5;
}

.achievement-item.locked .achievement-icon {
    background: var(--border-color) !important;
    box-shadow: none;
}

/* Dark mode */
.dark-mode .achievement-item {
    background: var(--card-bg);
    border-color: var(--border-color);
}

.dark-mode .achievement-icon {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

.badges-container {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-8);
    background: var(--color-bg-1);
    border-radius: var(--radius-base);
    text-align: center;
    transition: all 0.2s ease;
}

.badge.earned {
    background: linear-gradient(45deg, var(--color-primary), var(--color-teal-400));
    color: white;
}

.badge:hover {
    transform: translateY(-2px);
}

.badge-icon {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-4);
}

.badge-name {
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.timer-widget {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-8) var(--space-12);
    background: var(--color-bg-3);
    border-radius: var(--radius-base);
    font-family: var(--font-family-mono);
}

.timer-display {
    font-weight: 600;
    min-width: 60px;
}

.timer-btn {
    padding: var(--space-4) var(--space-8);
    border: none;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-xs);
}

.notes-section {
    margin-top: var(--space-16);
}

.notes-textarea {
    width: 100%;
    min-height: 100px;
    padding: var(--space-12);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    background: var(--color-surface);
    color: var(--color-text);
    font-family: var(--font-family-base);
    resize: vertical;
}

.status-selector {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
    margin: var(--space-16) 0;
}

.status-option {
    padding: var(--space-6) var(--space-12);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-xs);
    transition: all 0.2s ease;
}

.status-option.not-started {
    border-color: var(--color-gray-300);
}

.status-option.in-progress {
    border-color: var(--color-orange-400);
}

.status-option.completed {
    border-color: var(--color-teal-400);
}

.status-option.revisit {
    border-color: var(--color-red-400);
}

.status-option.mastered {
    border-color: var(--color-primary);
}

.status-option.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.bookmark-btn {
    padding: var(--space-6);
    border: none;
    background: transparent;
    cursor: pointer !important;
    /* ISSUE 3 FIX: Always show pointer cursor */
    font-size: var(--font-size-lg);
    transition: transform 0.2s ease;
}

.bookmark-btn:hover {
    transform: scale(1.2);
    cursor: pointer !important;
    /* ISSUE 3 FIX: Keep pointer on hover */
}

.bookmark-btn.active {
    color: var(--color-orange-400);
    cursor: pointer !important;
    /* ISSUE 3 FIX: Keep pointer when active */
}

/* Responsive Breakpoints */

/* Tablet: Hide right sidebar */
@media (max-width: 1200px) {
    .app-container {
        grid-template-columns: 260px 1fr;
        grid-template-areas: "left-sidebar main-content";
    }

    .right-sidebar {
        display: none;
    }
}

/* Mobile: Hide both sidebars, add toggle buttons */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-content {
        position: fixed;
        top: 64px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 64px);
        background: var(--color-surface);
        flex-direction: column;
        padding: 24px;
        transition: left 0.3s ease;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .nav-content.active {
        left: 0;
    }

    .nav-stats {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }

    .app-container {
        grid-template-columns: 1fr;
        grid-template-areas: "main-content";
    }

    .left-sidebar,
    .right-sidebar {
        position: fixed;
        top: 64px;
        height: calc(100vh - 64px);
        z-index: 90;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 4px 0 12px rgba(0, 0, 0, 0.1);
    }

    .left-sidebar {
        left: 0;
        width: 280px;
    }

    .left-sidebar.active {
        transform: translateX(0);
    }

    .right-sidebar {
        right: 0;
        width: 300px;
        transform: translateX(100%);
    }

    .right-sidebar.active {
        transform: translateX(0);
    }

    .sidebar-toggle-left,
    .sidebar-toggle-right {
        display: flex;
    }

    .patterns-grid {
        grid-template-columns: 1fr;
        padding: 0;
        margin: 0;
        width: 100%;
    }

    .problems-list {
        max-width: 100%;
        overflow-x: hidden;
    }

    .pattern-card.expanded-full-width {
        max-width: calc(100vw - (var(--space-16) * 2));
        margin: 0 auto;
    }

    .top-controls {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .modal-content {
        margin: var(--space-16);
        width: calc(100% - 32px);
    }

    #videoModal .modal-content {
        max-width: 95vw;
        margin: var(--space-8);
        width: calc(100% - 16px);
    }

    .video-modal-header {
        padding: var(--space-12);
        margin-bottom: var(--space-12);
    }

    .video-modal-header h3 {
        font-size: 1.25rem;
    }

    .video-footer {
        padding: 0 var(--space-12) var(--space-12);
        margin-top: var(--space-12);
    }

    .youtube-link {
        padding: var(--space-8) var(--space-12);
        font-size: var(--font-size-sm);
    }

    .video-error {
        padding: var(--space-20);
        margin: var(--space-12);
    }

    .calendar-heatmap {
        grid-template-columns: repeat(26, 1fr);
    }

    .problem-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .company-badges {
        width: 100%;
    }

    .video-btn,
    .solve-btn {
        flex: 1;
        min-width: 100px;
        padding: 6px 10px;
        font-size: 0.75rem;
    }

    .checkbox-container {
        width: 20px;
        height: 20px;
    }

    .checkbox-container .checkmark {
        width: 20px;
        height: 20px;
    }

    .checkbox-container .checkmark:after {
        left: 6px;
        top: 2px;
        width: 5px;
        height: 9px;
    }

    .company-badge {
        font-size: 0.7rem;
        padding: 2px 6px;
        margin: 1px;
    }

    .company-badges {
        gap: 2px;
        margin: 6px 0;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--space-16);
    }

    .pattern-card {
        padding: var(--space-16);
    }

    .modal-content {
        padding: var(--space-20);
    }

    .nav-stats {
        display: none;
    }
}

/* Keyboard shortcuts help */
.shortcuts-help {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    box-shadow: var(--shadow-glass);
    z-index: 3000;
    display: none;
}

.shortcuts-help.active {
    display: block;
}

/* Company Badge Styles - Small and Uncolored */
.company-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    margin: 4px 0;
}

.company-badge {
    display: inline-block;
    padding: 2px 6px;
    margin: 2px 3px 2px 0;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.company-badge:hover {
    background: var(--hover-bg);
    border-color: var(--text-secondary);
}

/* Dark mode company badges */
.dark-mode .company-badge {
    color: #94a3b8;
    border-color: rgba(255, 255, 255, 0.15);
}

.dark-mode .company-badge:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Remove all company-specific colors - all badges look the same */
.company-badge.amazon,
.company-badge.google,
.company-badge.microsoft,
.company-badge.facebook,
.company-badge.apple,
.company-badge.meta,
.company-badge.linkedin,
.company-badge.bloomberg,
.company-badge.goldman-sachs,
.company-badge.adobe,
.company-badge.oracle,
.company-badge.uber,
.company-badge.flipkart {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* Checkbox Wrapper - Fixed Implementation */
.checkbox-wrapper {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    margin-right: 12px;
}

/* Hide native checkbox */
.problem-checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    cursor: pointer;
}

/* Custom Checkbox */
.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

/* Hover */
.checkbox-wrapper:hover .checkbox-custom {
    border-color: #56CCF2;
    transform: scale(1.05);
}

/* Checked State - Blue Gradient */
.problem-checkbox:checked+.checkbox-custom {
    background: linear-gradient(135deg, #56CCF2 0%, #2F80ED 100%);
    border-color: #2F80ED;
    box-shadow: 0 2px 6px rgba(47, 128, 237, 0.3);
}

/* Checkmark */
.checkbox-custom::after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Show checkmark when checked */
.problem-checkbox:checked+.checkbox-custom::after {
    display: block;
}

/* Completed problem styling */
.problem-item.completed {
    opacity: 0.6;
}

.problem-item.completed .problem-name {
    text-decoration: line-through;
    color: var(--text-secondary);
}

/* Dark mode */
.dark-mode .checkbox-custom {
    border-color: rgba(255, 255, 255, 0.2);
}

.dark-mode .checkbox-wrapper:hover .checkbox-custom {
    border-color: #56CCF2;
}

/* Modern video and solve button styles */
.video-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: none;
    /*0 2px 6px rgba(102, 126, 234, 0.25);*/
    position: relative;
    min-width: 60px;
    /* Added min-width */
    max-width: 100px;
    /* Added max-width */
}

.video-btn svg {
    width: 14px;
    height: 14px;
}

.video-btn::before {
    content: "▶";
    font-size: 0.7rem;
}

.video-btn:hover {
    transform: translateY(-1px);
    /* box-shadow: 0 4px 10px rgba(102, 126, 234, 0.35); */
}

.video-btn:active {
    transform: translateY(0);
}

.solve-btn {
    padding: 5px 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #56CCF2 0%, #2F80ED 100%);
    color: white;
    font-weight: 700;
    font-size: 0.8rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
    box-shadow: none;
    /* 0 2px 6px rgba(47, 128, 237, 0.25);*/
    position: relative;
    min-width: 50px;
    /* Added min-width */
    max-width: 58px;
    /* Added max-width */
}

/* Remove arrow from solve button */
.solve-btn::after {
    display: none;
}

.solve-btn:hover {
    transform: translateY(-1px) scale(1.03);
    /* box-shadow: 0 4px 10px rgba(47, 128, 237, 0.35); */
}

.solve-btn:active {
    transform: translateY(0) scale(1);
}

/* Dark mode checkbox adjustments */
body.dark-mode .checkmark {
    border-color: rgba(255, 255, 255, 0.2);
}

body.dark-mode .checkbox-container:hover .checkmark {
    border-color: #56CCF2;
}

body.dark-mode .checkbox-container input:checked~.checkmark {
    background: linear-gradient(135deg, #56CCF2 0%, #2F80ED 100%);
    border-color: #2F80ED;
    box-shadow: 0 2px 8px rgba(47, 128, 237, 0.4);
}

@media (prefers-color-scheme: dark) {
    .checkmark {
        border-color: rgba(255, 255, 255, 0.2);
    }

    .checkbox-container:hover .checkmark {
        border-color: #56CCF2;
    }

    .checkbox-container input:checked~.checkmark {
        background: linear-gradient(135deg, #56CCF2 0%, #2F80ED 100%);
        border-color: #2F80ED;
        box-shadow: 0 2px 8px rgba(47, 128, 237, 0.4);
    }
}

/* Quick Stats in Left Sidebar - Even More Compact */
.left-sidebar .quick-stats-section {
    margin-top: 0;
    padding: 0;
}

.left-sidebar .stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    /* Reduced from 8px */
}

/* Even smaller stat cards */
.left-sidebar .stat-card {
    padding: 6px;
    /* Reduced from 8px */
    display: flex;
    align-items: center;
    gap: 6px;
    /* Reduced from 8px */
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    /* Reduced from 8px */
    transition: all 0.3s ease;
}

.left-sidebar .stat-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
    /* Even softer */
}

/* Smaller icon container */
.left-sidebar .stat-icon {
    width: 28px;
    /* Reduced from 32px */
    height: 28px;
    border-radius: 6px;
    /* Reduced from 8px */
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    /* Softer shadow */
}

/* Smaller SVG icons */
.left-sidebar .stat-icon svg {
    width: 14px;
    /* Reduced from 16px */
    height: 14px;
}

/* Smaller text */
.left-sidebar .stat-content {
    flex: 1;
    min-width: 0;
}

.left-sidebar .stat-value {
    font-size: 0.9rem;
    /* Reduced from 1rem */
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.2;
}

.left-sidebar .stat-label {
    font-size: 0.55rem;
    /* Reduced from 0.6rem */
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.2px;
    /* Reduced */
    margin-top: 1px;
}

/* Smaller fire icon in streak */
.left-sidebar .fire-icon-inline {
    width: 12px;
    /* Reduced from 14px */
    height: 12px;
    margin-left: 2px;
}

.left-sidebar .stat-value-container {
    display: flex;
    align-items: center;
    gap: 2px;
    /* Reduced gap */
}

/* Fire icon styles for streak display */
.streak-display {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.streak-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.fire-icon {
    animation: flicker 2s ease-in-out infinite;
    filter: drop-shadow(0 0 4px rgba(250, 112, 154, 0.3));
}

@keyframes flicker {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.85;
        transform: scale(1.1);
    }
}

/* Dark mode - fire icon stays vibrant */
.dark-mode .fire-icon {
    filter: brightness(1.1) drop-shadow(0 0 6px rgba(250, 112, 154, 0.4));
}

@media (prefers-color-scheme: dark) {
    .fire-icon {
        filter: brightness(1.1) drop-shadow(0 0 6px rgba(250, 112, 154, 0.4));
    }
}

/* Streak container styling */
.stat-value-container {
    display: flex;
    align-items: center;
    gap: 6px;
}

.fire-icon-inline {
    vertical-align: middle;
    animation: flicker 2s ease-in-out infinite;
}

.streak-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.fire-icon {
    flex-shrink: 0;
}

/* Mobile responsive company badges */
@media (max-width: 768px) {
    .company-badge {
        font-size: 0.7rem;
        padding: 2px 6px;
        margin: 1px;
    }

    .company-badges {
        gap: 2px;
        margin: 6px 0;
    }

    .video-btn {
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    .solve-btn {
        padding: 5px 12px;
        font-size: 0.75rem;
    }

    .left-sidebar .stats-grid {
        grid-template-columns: 1fr;
        /* Stack on mobile */
    }

    /* Mobile adjustments for topics section */
    .topics-section {
        max-height: 50vh;
        /* Smaller on mobile */
    }

    .topic-list {
        max-height: calc(50vh - 40px);
    }
}

/* Filter status styles */
#activeFilters {
    padding: 8px;
    background: var(--color-bg-1);
    border-radius: var(--radius-sm);
    text-align: center;
}

/* Enhanced problem count display */
.problem-count-display {
    font-size: 13px;
    color: var(--color-primary);
    font-weight: 600;
    margin-top: 4px;
}

.shortcuts-list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-8) var(--space-16);
}

.shortcut-key {
    padding: var(--space-4) var(--space-8);
    background: var(--color-bg-1);
    border-radius: var(--radius-sm);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* New controls section styling */
.controls-section {
    margin-bottom: var(--space-24);
}

/* Top Controls - Three Items Inline */
.top-controls {
    margin-bottom: 20px;
}

.controls-row {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
}

/* Filter Wrappers (Company and Difficulty) */
.filter-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 180px;
    max-width: 250px;
}

.company-filter-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 180px;
    max-width: 250px;
}

.difficulty-filter-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 180px;
    max-width: 250px;
}

.filter-label {
    font-size: 0.75rem;
    /* Smaller label */
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
}

/* Custom dropdown morphism styling */
.custom-dropdown {
    position: relative;
    width: 100%;
    margin-bottom: var(--space-16);
}

/* Dropdown styling - more compact */
.custom-dropdown {
    position: relative;
    width: 100%;
}

.dropdown-selected {
    padding: 10px 14px;
    /* Reduced from 14px 16px */
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    /* Slightly smaller */
    min-height: 40px;
    /* Fixed height */
}

.dropdown-selected:hover {
    border-color: rgba(102, 126, 234, 0.5);
}

.dropdown-selected:active {
    transform: translateY(0);
}

.dropdown-arrow {
    transition: transform 0.3s ease;
    color: var(--color-text-secondary);
}

.dropdown-selected.active .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    max-height: 280px;
    overflow-y: auto;
    background: var(--color-surface);
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-search {
    padding: 12px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.dropdown-search input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 6px;
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.dropdown-search input:focus {
    border-color: rgba(102, 126, 234, 0.5);
}

.dropdown-option {
    padding: 12px 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

.dropdown-option:hover {
    background: rgba(102, 126, 234, 0.08);
}

.dropdown-option.selected {
    background: rgba(102, 126, 234, 0.15);
    color: #667eea;
    font-weight: 600;
}

.company-logo {
    font-size: 1.2rem;
}

/* Toggle Container */
.toggle-container {
    flex-shrink: 0;
    margin-left: auto;
}

/* Toggle Button - compact */
.toggle-cards-btn {
    padding: 10px 16px;
    /* Compact padding */
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-radius: 8px;
    background: transparent;
    color: var(--color-text);
    font-size: 0.85rem;
    /* Slightly smaller */
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    white-space: nowrap;
    min-height: 40px;
    /* Match dropdown height */
}

.toggle-cards-btn:hover {
    border-color: rgba(102, 126, 234, 0.6);
    background: rgba(102, 126, 234, 0.05);
}

.toggle-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Dark mode support */
body.dark-mode .dropdown-selected,
body.dark-mode .dropdown-menu {
    border-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode .dropdown-option:hover {
    background: rgba(255, 255, 255, 0.08);
}

body.dark-mode .dropdown-option.selected {
    background: rgba(102, 126, 234, 0.25);
}

@media (prefers-color-scheme: dark) {

    .dropdown-selected,
    .dropdown-menu {
        border-color: rgba(255, 255, 255, 0.15);
    }

    .dropdown-option:hover {
        background: rgba(255, 255, 255, 0.08);
    }

    .dropdown-option.selected {
        background: rgba(102, 126, 234, 0.25);
    }
}

/* Remove daily goal styles */
.daily-goal-widget {
    display: none;
    /* Hide completely */
}

/* Difficulty Filter Styling (same as Company) */
.difficulty-filter-container .custom-dropdown {
    position: relative;
    width: 100%;
}

/* Difficulty Indicators */
.difficulty-indicator {
    display: inline-block;
    margin-right: 6px;
    font-size: 0.8rem;
}

.difficulty-indicator.easy {
    color: #10b981;
}

.difficulty-indicator.medium {
    color: #f59e0b;
}

.difficulty-indicator.hard {
    color: #ef4444;
}

/* Responsive - stack on mobile */
@media (max-width: 768px) {
    .controls-row {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-wrapper {
        max-width: 100%;
    }

    .toggle-container {
        margin-left: 0;
        width: 100%;
    }

    .toggle-cards-btn {
        width: 100%;
    }

    /* Mobile: Remove sticky on small screens */
    .left-sidebar,
    .right-sidebar {
        position: fixed;
        top: 64px;
        max-height: calc(100vh - 64px);
    }
}

/* Tablet adjustments for topics section */
@media (min-width: 769px) and (max-width: 1200px) {
    .topics-section {
        max-height: 60vh;
    }

    .topic-list {
        max-height: calc(60vh - 40px);
    }
}