/**
 * LLM4S Production Roadmap Styles
 * A modern, minimal, and elegant design for open-source contributors
 * Mobile-first PWA-optimized experience
 */

/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */
:root {
    /* Colors */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Safe area insets for notched phones */
    --safe-area-inset-top: env(safe-area-inset-top, 0px);
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-inset-left: env(safe-area-inset-left, 0px);
    --safe-area-inset-right: env(safe-area-inset-right, 0px);

    /* Priority Colors */
    --color-p0: #dc2626;
    --color-p0-bg: #fef2f2;
    --color-p1: #ea580c;
    --color-p1-bg: #fff7ed;
    --color-p2: #2563eb;
    --color-p2-bg: #eff6ff;

    /* Accent Colors */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-success: #10b981;
    --color-success-bg: #ecfdf5;

    /* Label Colors */
    --color-testing: #8b5cf6;
    --color-testing-bg: #f5f3ff;
    --color-docs: #06b6d4;
    --color-docs-bg: #ecfeff;
    --color-api: #f59e0b;
    --color-api-bg: #fffbeb;
    --color-rag: #ec4899;
    --color-rag-bg: #fdf2f8;
    --color-security: #ef4444;
    --color-security-bg: #fef2f2;
    --color-performance: #14b8a6;
    --color-performance-bg: #f0fdfa;
    --color-observability: #8b5cf6;
    --color-observability-bg: #f5f3ff;
    --color-community: #22c55e;
    --color-community-bg: #f0fdf4;
    --color-quality: #f97316;
    --color-quality-bg: #fff7ed;
    --color-good-first-issue: #10b981;
    --color-good-first-issue-bg: #ecfdf5;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Layout */
    --container-max-width: 1280px;
    --header-height: 80px;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Mobile optimizations */
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    touch-action: manipulation;
    overscroll-behavior: none;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    min-height: 100vh;
    min-height: 100dvh; /* Dynamic viewport height for mobile */
    display: flex;
    flex-direction: column;
    /* Prevent overscroll bounce on iOS */
    overscroll-behavior-y: none;
    /* Smooth scrolling */
    -webkit-overflow-scrolling: touch;
    /* Safe area padding for notched phones */
    padding-left: var(--safe-area-inset-left);
    padding-right: var(--safe-area-inset-right);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input,
select {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   Utility Classes
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.hidden {
    display: none !important;
}

/* ========================================
   Header Styles
   ======================================== */
.header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-6) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.95);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Header hidden state for mobile scroll */
.header.header-hidden {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.header-logo {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    object-fit: contain;
    flex-shrink: 0;
}

.header-text {
    flex: 1;
    min-width: 280px;
}

.title-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

.title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.025em;
}

.version-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-3);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.subtitle {
    margin-top: var(--spacing-1);
    color: var(--color-gray-500);
    font-size: var(--font-size-base);
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-gray-900);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.github-link:hover {
    background: var(--color-gray-700);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.github-icon {
    width: 20px;
    height: 20px;
}

/* Header Actions Container */
.header-actions {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

/* Roadmap Link */
.roadmap-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

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

.roadmap-icon {
    width: 20px;
    height: 20px;
}

/* DevHour Link */
.devhour-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.devhour-link:hover {
    background: linear-gradient(135deg, #d97706, #b45309);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.devhour-icon {
    width: 20px;
    height: 20px;
}

/* ========================================
   Filter Section Styles
   ======================================== */
.filter-section {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-5) 0;
}

.filter-bar {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.filter-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-group {
    flex: 1;
    min-width: 200px;
    max-width: 320px;
}

.search-wrapper {
    position: relative;
}

.search-icon {
    position: absolute;
    left: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--color-gray-400);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3) var(--spacing-2) var(--spacing-10);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    font-size: var(--font-size-sm);
    color: var(--color-gray-800);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-input::placeholder {
    color: var(--color-gray-400);
}

.filter-select {
    padding: var(--spacing-2) var(--spacing-8) var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    font-size: var(--font-size-sm);
    color: var(--color-gray-800);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 16px;
    transition: all var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Toggle Switch */
.toggle-group {
    justify-content: flex-end;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
    user-select: none;
}

.toggle-checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--color-white);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.toggle-checkbox:checked + .toggle-switch {
    background: var(--color-success);
}

.toggle-checkbox:checked + .toggle-switch::after {
    transform: translateX(20px);
}

.toggle-checkbox:focus + .toggle-switch {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.toggle-text {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    white-space: nowrap;
}

/* Clear Filters Button */
.clear-filters-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-2) var(--spacing-3);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.clear-filters-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.clear-icon {
    width: 16px;
    height: 16px;
}

/* Results Info */
.results-info {
    margin-top: var(--spacing-4);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-gray-100);
}

#results-count {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-600);
}

/* ========================================
   Tab Navigation
   ======================================== */

.tab-section {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.tab-nav {
    display: flex;
    gap: var(--spacing-2);
    padding: var(--spacing-3) 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.tab-nav::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-500);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    flex-shrink: 0;
}

.tab-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.tab-btn:hover {
    color: var(--color-gray-700);
    background: var(--color-gray-100);
}

.tab-btn.active {
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--color-primary);
}

.tab-text {
    display: inline;
}

.filter-section.hidden,
.issues-grid.hidden {
    display: none;
}

/* ========================================
   Main Content & Issues Grid
   ======================================== */
.main-content {
    flex: 1;
    padding: var(--spacing-8) 0;
}

.issues-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--spacing-6);
}

/* ========================================
   Issue Card Styles
   ======================================== */
.issue-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
}

.issue-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--color-gray-300);
}

.issue-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
}

.issue-priority {
    flex-shrink: 0;
}

.priority-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    font-weight: 700;
    border-radius: var(--radius-md);
    min-width: 32px;
}

.priority-badge.p0 {
    background: var(--color-p0-bg);
    color: var(--color-p0);
}

.priority-badge.p1 {
    background: var(--color-p1-bg);
    color: var(--color-p1);
}

.priority-badge.p2 {
    background: var(--color-p2-bg);
    color: var(--color-p2);
}

.issue-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-900);
    line-height: 1.4;
    margin: 0;
    flex: 1;
}

.issue-description {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
    flex: 1;
}

.issue-labels {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-5);
}

.label {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-md);
}

/* Label color variations */
.label.testing {
    background: var(--color-testing-bg);
    color: var(--color-testing);
}

.label.quality {
    background: var(--color-quality-bg);
    color: var(--color-quality);
}

.label.docs {
    background: var(--color-docs-bg);
    color: var(--color-docs);
}

.label.api {
    background: var(--color-api-bg);
    color: var(--color-api);
}

.label.rag {
    background: var(--color-rag-bg);
    color: var(--color-rag);
}

.label.agents {
    background: var(--color-rag-bg);
    color: var(--color-rag);
}

.label.security {
    background: var(--color-security-bg);
    color: var(--color-security);
}

.label.performance {
    background: var(--color-performance-bg);
    color: var(--color-performance);
}

.label.observability {
    background: var(--color-observability-bg);
    color: var(--color-observability);
}

.label.community {
    background: var(--color-community-bg);
    color: var(--color-community);
}

.label.good-first-issue {
    background: var(--color-good-first-issue-bg);
    color: var(--color-good-first-issue);
}

/* Assignee Banner */
.assignee-banner {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-4);
    flex-wrap: wrap;
    border-left: 3px solid #f59e0b;
}

.assignee-banner.closed {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-left-color: #10b981;
}

.assignee-banner.open {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left-color: #f59e0b;
}

.status-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.status-icon.merged {
    color: #059669;
}

.status-icon.in-progress {
    color: #b45309;
}

.status-badge {
    font-size: var(--font-size-xs);
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.closed {
    background: #059669;
    color: white;
}

.status-badge.open {
    background: #f59e0b;
    color: white;
}

.assignee-icon {
    width: 16px;
    height: 16px;
    color: #b45309;
    flex-shrink: 0;
}

.assignee-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: #92400e;
}

.assignee-banner.closed .assignee-label {
    color: #065f46;
}

.assignee-banner.closed .assignee-link {
    color: #065f46;
}

.assignee-banner.closed .assignee-link:hover {
    color: #064e3b;
}

.assignee-banner.closed .issue-link {
    color: #059669;
}

.assignee-banner.closed .issue-link:hover {
    color: #047857;
}

.assignee-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

.assignee-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: #92400e;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.assignee-link:hover {
    background: rgba(255, 255, 255, 0.95);
    color: #78350f;
}

.assignee-avatar {
    width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.issue-pr-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-left: auto;
}

.issue-link {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: #b45309;
    text-decoration: none;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.issue-link:hover {
    background: rgba(255, 255, 255, 0.9);
    color: #78350f;
}

.pr-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-decoration: none;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.pr-link.merged {
    background: #ddd6fe;
    color: #7c3aed;
}

.pr-link.merged:hover {
    background: #c4b5fd;
    color: #6d28d9;
}

.pr-link.open {
    background: #dbeafe;
    color: #2563eb;
}

.pr-link.open:hover {
    background: #bfdbfe;
    color: #1d4ed8;
}

.pr-icon {
    width: 12px;
    height: 12px;
}

.pr-icon.merged {
    color: #7c3aed;
}

.pr-icon.open {
    color: #2563eb;
}

.assignee-banner.closed .pr-link.merged {
    background: rgba(221, 214, 254, 0.8);
}

.issue-card.has-assignee {
    border-color: #fcd34d;
}

.issue-card.has-assignee.is-closed {
    border-color: #6ee7b7;
}

/* CTA Button */
.issue-cta {
    margin-top: auto;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-gray-900);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

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

.cta-button svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.cta-button:hover svg {
    transform: translateX(2px);
}

/* ========================================
   Empty State Styles
   ======================================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-16) var(--spacing-4);
    text-align: center;
}

.empty-icon {
    width: 64px;
    height: 64px;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-4);
}

.empty-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.empty-text {
    font-size: var(--font-size-base);
    color: var(--color-gray-500);
}

/* ========================================
   Footer Styles
   ======================================== */
.footer {
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    padding: var(--spacing-8) 0;
    margin-top: auto;
}

.footer-content {
    text-align: center;
}

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2);
}

.footer-links {
    font-size: var(--font-size-sm);
}

.footer-links a {
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}

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

.separator {
    margin: 0 var(--spacing-2);
    color: var(--color-gray-300);
}

/* ========================================
   Responsive Styles
   ======================================== */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-4);
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-4);
    }

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

    .title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-2);
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        width: 100%;
    }

    .search-group {
        max-width: none;
    }

    .filter-select {
        width: 100%;
    }

    .toggle-group {
        justify-content: flex-start;
        padding-top: var(--spacing-2);
    }

    .clear-filters-btn {
        width: 100%;
        justify-content: center;
        padding: var(--spacing-3);
        background: var(--color-gray-100);
    }

    .issues-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
    }

    .issue-card {
        padding: var(--spacing-5);
    }

    .main-content {
        padding: var(--spacing-6) 0;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: var(--font-size-lg);
    }

    .subtitle {
        font-size: var(--font-size-sm);
    }

    .github-link {
        width: 100%;
        justify-content: center;
    }

    .issue-header {
        flex-direction: column;
        gap: var(--spacing-2);
    }

    .issue-title {
        font-size: var(--font-size-sm);
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.issue-card {
    animation: fadeIn var(--transition-slow) ease-out;
    will-change: transform, opacity;
    transform: translateZ(0); /* Hardware acceleration */
}

.live-issue-card {
    animation: slideUp 0.4s ease-out;
    animation-fill-mode: both;
}

/* Staggered animation for cards */
.issue-card:nth-child(1), .live-issue-card:nth-child(1) { animation-delay: 0ms; }
.issue-card:nth-child(2), .live-issue-card:nth-child(2) { animation-delay: 30ms; }
.issue-card:nth-child(3), .live-issue-card:nth-child(3) { animation-delay: 60ms; }
.issue-card:nth-child(4), .live-issue-card:nth-child(4) { animation-delay: 90ms; }
.issue-card:nth-child(5), .live-issue-card:nth-child(5) { animation-delay: 120ms; }
.issue-card:nth-child(6), .live-issue-card:nth-child(6) { animation-delay: 150ms; }
.issue-card:nth-child(7), .live-issue-card:nth-child(7) { animation-delay: 180ms; }
.issue-card:nth-child(8), .live-issue-card:nth-child(8) { animation-delay: 210ms; }
.issue-card:nth-child(9), .live-issue-card:nth-child(9) { animation-delay: 240ms; }
.issue-card:nth-child(10), .live-issue-card:nth-child(10) { animation-delay: 270ms; }

/* ========================================
   Leaderboard Styles
   ======================================== */

.leaderboard-section {
    padding: var(--spacing-6) 0;
}

.leaderboard-section.hidden {
    display: none;
}

.leaderboard-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.leaderboard-title {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.leaderboard-title svg {
    width: 28px;
    height: 28px;
    color: #f59e0b;
}

.leaderboard-subtitle {
    color: var(--color-gray-500);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-6);
}

.leaderboard-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-8);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.leaderboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-4);
}

.contributor-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.contributor-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.contributor-card.rank-1 {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-color: #f59e0b;
}

.contributor-card.rank-2 {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-color: #94a3b8;
}

.contributor-card.rank-3 {
    background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
    border-color: #ea580c;
}

.contributor-rank {
    font-size: var(--font-size-xl);
    font-weight: 700;
    min-width: 40px;
    text-align: center;
}

.contributor-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    text-decoration: none;
    flex: 1;
    min-width: 0;
}

.contributor-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-white);
    box-shadow: var(--shadow-sm);
}

.contributor-name {
    font-weight: 600;
    color: var(--color-gray-900);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.contributor-info:hover .contributor-name {
    color: var(--color-primary);
}

.contributor-stats {
    display: flex;
    gap: var(--spacing-2);
}

.contrib-stat {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.contrib-stat svg {
    width: 12px;
    height: 12px;
}

.contrib-stat.merged {
    background: #d1fae5;
    color: #059669;
}

.contrib-stat.opened {
    background: #dbeafe;
    color: #2563eb;
}

.contrib-stat.closed {
    background: #f3e8ff;
    color: #9333ea;
}

.contributor-score {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-left: var(--spacing-3);
    border-left: 1px solid var(--color-gray-200);
}

.score-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
}

.score-label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

.leaderboard-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-16);
    color: var(--color-gray-500);
}

.leaderboard-loading.hidden {
    display: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-4);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.leaderboard-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-12);
    color: var(--color-gray-500);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-4);
}

.retry-btn {
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.error-text {
    color: var(--color-p0);
}

@media (max-width: 640px) {
    .contributor-stats {
        display: none;
    }
    
    .tab-nav {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        padding-bottom: var(--spacing-1);
    }
    
    .tab-nav::-webkit-scrollbar {
        display: none;
    }
    
    .tab-btn {
        flex: 0 0 auto;
        min-width: auto;
        padding: var(--spacing-2) var(--spacing-3);
        font-size: var(--font-size-xs);
    }
    
    .tab-text {
        display: inline;
    }
    
    .leaderboard-stats {
        gap: var(--spacing-4);
    }
    
    .stat-value {
        font-size: var(--font-size-xl);
    }
}

/* ========================================
   Live Issues Section Styles
   ======================================== */

.live-issues-section {
    padding: var(--spacing-4) 0;
}

.live-issues-section.hidden {
    display: none;
}

.live-issues-header {
    text-align: center;
    margin-bottom: var(--spacing-6);
}

.live-issues-title {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.live-issues-title svg {
    width: 24px;
    height: 24px;
    color: #10b981;
}

.live-issues-subtitle {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-4);
}

.live-issues-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

.filter-chip {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-chip.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.live-issues-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.live-issue-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.live-issue-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.live-issue-card:active {
    transform: scale(0.98);
}

.live-issue-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
}

.live-issue-number {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.live-issue-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-900);
    line-height: 1.4;
    flex: 1;
}

.live-issue-title a {
    color: inherit;
    text-decoration: none;
}

.live-issue-title a:hover {
    color: var(--color-primary);
}

.live-issue-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

.live-issue-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.live-issue-author img {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
}

.live-issue-labels {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-1);
}

.live-issue-label {
    padding: 2px 8px;
    font-size: 10px;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
}

.live-issue-assignees {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    margin-left: auto;
}

.live-issue-assignees img {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-white);
    margin-left: -8px;
}

.live-issue-assignees img:first-child {
    margin-left: 0;
}

.live-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 10px;
    font-weight: 700;
    background: #10b981;
    color: white;
    border-radius: var(--radius-full);
    margin-left: var(--spacing-1);
}

.live-badge:empty {
    display: none;
}

.live-issues-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-12);
    color: var(--color-gray-500);
}

.live-issues-loading.hidden {
    display: none;
}

/* ========================================
   Mobile App-like Experience
   ======================================== */

/* Smoother touch interactions */
@media (hover: none) and (pointer: coarse) {
    .issue-card,
    .live-issue-card,
    .contributor-card,
    .cta-button,
    .tab-btn,
    .filter-chip,
    .github-link,
    .roadmap-link,
    .devhour-link {
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    .issue-card:active,
    .live-issue-card:active,
    .contributor-card:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
    
    .cta-button:active,
    .tab-btn:active,
    .filter-chip:active {
        transform: scale(0.95);
        transition: transform 0.1s ease;
    }
}

/* Pull-to-refresh visual hint */
.pull-indicator {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-primary);
    color: white;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.pull-indicator.visible {
    transform: translateX(-50%) translateY(0);
}

/* Bottom safe area for iOS home indicator */
.footer {
    padding-bottom: calc(var(--spacing-8) + var(--safe-area-inset-bottom));
}

/* Optimized header for mobile */
@media (max-width: 768px) {
    .header {
        padding: var(--spacing-4) 0;
        padding-top: calc(var(--spacing-4) + var(--safe-area-inset-top));
    }
    
    .header-logo {
        width: 44px;
        height: 44px;
    }
    
    .header-actions {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-2);
    }
    
    .github-link,
    .roadmap-link,
    .devhour-link {
        padding: var(--spacing-2) var(--spacing-2);
        font-size: var(--font-size-xs);
        justify-content: center;
    }
    
    .github-icon,
    .roadmap-icon,
    .devhour-icon {
        width: 16px;
        height: 16px;
    }
    
    .tab-section {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }
    
    .tab-btn {
        padding: var(--spacing-3) var(--spacing-4);
        gap: var(--spacing-1);
    }
    
    .tab-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .issues-grid {
        gap: var(--spacing-3);
    }
    
    .issue-card {
        padding: var(--spacing-4);
        border-radius: var(--radius-lg);
    }
    
    .main-content {
        padding: var(--spacing-4) 0;
    }
    
    .leaderboard-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3);
    }
}

/* Extra small screens */
@media (max-width: 380px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    .title {
        font-size: var(--font-size-base);
    }
    
    .version-badge {
        font-size: 9px;
        padding: 2px 6px;
    }
    
    .header-actions {
        grid-template-columns: 1fr 1fr;
    }
    
    .devhour-link {
        grid-column: 1 / -1;
    }
    
    .priority-badge {
        font-size: 10px;
        padding: 2px 6px;
    }
    
    .issue-title {
        font-size: var(--font-size-sm);
    }
    
    .issue-description {
        font-size: var(--font-size-xs);
    }
    
    .cta-button {
        padding: var(--spacing-3);
        font-size: var(--font-size-xs);
    }
}

/* Landscape mode optimizations */
@media (max-height: 500px) and (orientation: landscape) {
    .header {
        padding: var(--spacing-2) 0;
    }
    
    .header-content {
        flex-direction: row;
        align-items: center;
    }
    
    .header-logo {
        width: 36px;
        height: 36px;
    }
    
    .filter-section {
        padding: var(--spacing-3) 0;
    }
    
    .tab-section {
        position: relative;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .issue-card,
    .live-issue-card {
        border-width: 2px;
    }
    
    .cta-button {
        border: 2px solid currentColor;
    }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}