/* CSS Variables for Theme Management */
:root {
    /* Light Theme Colors */
    --primary-color: #667eea;
    --secondary-color: #ea3097;
    --accent-color: #f093fb;
    --success-color: #4ade80;
    --warning-color: #fbbf24;
    --error-color: #f87171;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-overlay: rgba(0, 0, 0, 0.5);
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    
    /* Border Colors */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --border-dark: #94a3b8;
    
    /* Shadow Colors */
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-heavy: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 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;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-overlay: rgba(0, 0, 0, 0.7);
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-light: #334155;
    --border-medium: #475569;
    --border-dark: #64748b;
    
    --shadow-light: rgba(0, 0, 0, 0.2);
    --shadow-medium: rgba(0, 0, 0, 0.3);
    --shadow-heavy: rgba(0, 0, 0, 0.4);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--text-inverse);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: var(--z-tooltip);
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 6px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: var(--z-fixed);
    padding: var(--spacing-md) 0;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.brand-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.back-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--primary-color);
}

.brand-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.brand-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

.nav-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

/* Buttons */
.btn-icon {
    background: none;
    border: none;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--bg-card);
    z-index: var(--z-modal);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.mobile-menu-header h2 {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

.mobile-nav {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.mobile-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-weight: 500;
}

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

.mobile-nav-item i {
    width: 20px;
    text-align: center;
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
    padding-bottom: 80px; /* Add padding for bottom nav on mobile */
}

/* Bottom Navigation Bar (Mobile Only) */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-light);
    z-index: var(--z-fixed);
    display: none; /* Hidden by default, shown on mobile */
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    flex: 1;
    text-align: center;
    border-radius: var(--radius-sm);
}

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

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

.bottom-nav-item i {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.bottom-nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    padding: var(--spacing-3xl) var(--spacing-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* Streak Display */
.streak-display {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.streak-badge {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    color: var(--text-inverse);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s infinite;
}

.streak-count {
    font-weight: 700;
    font-size: var(--font-size-2xl);
}

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

.streak-progress {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.streak-bar {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.streak-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff6b6b, #ffa500);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

.streak-text {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    font-weight: 500;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Section Styles */
.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* Vent Form Section */
.vent-form-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.vent-form-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 0 8px 32px var(--shadow-light);
    border: 1px solid var(--border-light);
    max-width: 800px;
    margin: 0 auto;
}

.form-header {
    margin-bottom: var(--spacing-xl);
}

.mood-selector {
    text-align: center;
}

.mood-label {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.mood-options {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.mood-option {
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 80px;
}

.mood-option:hover {
    border-color: var(--primary-color);
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.mood-option.selected {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.mood-option i {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
}

.mood-option span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

/* Form Styles */
.vent-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.form-group {
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--transition-fast);
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-card);
}

.form-group textarea::placeholder {
    color: var(--text-muted);
}

.char-counter {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    background: var(--bg-card);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* Community Section */
.community-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.filter-controls {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.filter-btn:hover {
    background: var(--bg-tertiary);
}

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

.vents-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

/* Vent Cards - Twitter-like Design */
.vent-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.vent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.vent-card:hover::before {
    transform: scaleX(1);
}

.vent-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: var(--border-medium);
}

.vent-avatar {
    flex-shrink: 0;
}

.avatar-circle {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-transform: uppercase;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.avatar-circle:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.avatar-circle:active {
    transform: scale(0.95);
}

/* Diverse avatar colors for different users */
.vent-card:nth-child(3n+1) .avatar-circle {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.vent-card:nth-child(3n+2) .avatar-circle {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.vent-card:nth-child(3n+3) .avatar-circle {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.vent-card:nth-child(3n+4) .avatar-circle {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
}

.vent-card:nth-child(3n+5) .avatar-circle {
    background: linear-gradient(135deg, #fa709a, #fee140);
}

.vent-card:nth-child(3n+6) .avatar-circle {
    background: linear-gradient(135deg, #a8edea, #fed6e3);
}

.vent-content-wrapper {
    flex: 1;
    min-width: 0;
}

.vent-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.username {
    font-weight: 700;
    font-size: var(--font-size-md);
    color: var(--text-primary);
    text-decoration: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.username:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.username:active {
    transform: scale(0.98);
}

.user-handle {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 400;
}

.vent-time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-left: auto;
}

.more-options {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: var(--spacing-xs);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: var(--spacing-sm);
}

.more-options:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.vent-content {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    color: var(--text-primary);
    font-size: var(--font-size-md);
}

.vent-content p {
    margin: 0;
    word-wrap: break-word;
}

.vent-actions {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-light);
    margin-top: var(--spacing-sm);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: none;
    border: none;
    color: var(--text-muted);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    min-width: 0;
    position: relative;
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-md);
    background: currentColor;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.action-btn:hover::before {
    opacity: 0.1;
}

.action-btn:hover {
    background: transparent;
    color: var(--text-primary);
}

.action-btn.like-btn:hover {
    color: #e74c3c;
}

.action-btn.comment-btn:hover {
    color: var(--primary-color);
}

.action-btn.share-btn:hover {
    color: var(--secondary-color);
    background: rgba(255, 107, 107, 0.1);
}

.action-btn.liked {
    color: #e74c3c;
}

.action-btn.liked i {
    animation: heartBeat 0.3s ease-in-out;
}

.action-btn .count {
    font-weight: 500;
    min-width: 20px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.action-btn i {
    position: relative;
    z-index: 1;
}

.action-btn.reacted {
    transform: scale(1.1);
}

/* Heart beat animation for likes */
@keyframes heartBeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* Reaction feedback notifications */
.reaction-feedback {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-card);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-medium);
    border: 1px solid var(--border-light);
    z-index: var(--z-modal);
    transform: translateX(100%);
    opacity: 0;
    transition: all var(--transition-normal);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.reaction-feedback.show {
    transform: translateX(0);
    opacity: 1;
}

.load-more {
    text-align: center;
}

/* Streak Section */
.streak-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.streak-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 0 8px 32px var(--shadow-light);
    border: 1px solid var(--border-light);
    max-width: 800px;
    margin: 0 auto;
}

.streak-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    text-align: center;
}

.streak-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    color: var(--text-inverse);
    animation: pulse 2s infinite;
}

.streak-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.streak-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.streak-info p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.streak-calendar {
    margin-bottom: var(--spacing-2xl);
}

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

.calendar-header span {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--spacing-sm);
}

.calendar-day {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.calendar-day.completed {
    background: rgba(74, 222, 128, 0.1);
    border-color: var(--success-color);
}

.calendar-day.today {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    color: var(--text-inverse);
}

.calendar-day i {
    font-size: var(--font-size-sm);
}

.day-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.streak-achievements h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.achievement {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.achievement.unlocked {
    border-color: var(--success-color);
    background: rgba(74, 222, 128, 0.1);
}

.achievement.locked {
    opacity: 0.5;
    background: var(--bg-tertiary);
}

.achievement i {
    font-size: var(--font-size-xl);
    color: var(--success-color);
    margin-bottom: var(--spacing-sm);
}

.achievement span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

/* Safety Section */
.safety-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.safety-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 0 8px 32px var(--shadow-light);
    border: 1px solid var(--border-light);
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.safety-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    color: var(--text-inverse);
    flex-shrink: 0;
}

.safety-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.safety-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.safety-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.safety-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.safety-feature i {
    color: var(--primary-color);
    width: 16px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-overlay);
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px var(--shadow-heavy);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

.modal-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: var(--bg-secondary);
}

.modal-body {
    padding: var(--spacing-xl);
    text-align: center;
}

.success-animation {
    font-size: var(--font-size-4xl);
    color: var(--success-color);
    margin-bottom: var(--spacing-lg);
    animation: bounce 1s ease;
}

.modal-body p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
}

.streak-update {
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--success-color);
    font-weight: 500;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

.modal-footer .btn-secondary {
    flex: 1;
}

.modal-footer .btn-primary {
    flex: 1;
}

/* Footer */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    text-align: center;
}

.footer-brand h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0,0,0);
    }
    40%, 43% {
        transform: translate3d(0, -30px, 0);
    }
    70% {
        transform: translate3d(0, -15px, 0);
    }
    90% {
        transform: translate3d(0, -4px, 0);
    }
}

/* Responsive Design */
@media (min-width: 768px) {
    .vents-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .achievements-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .vents-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero-stats {
        gap: var(--spacing-3xl);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--spacing-xs) var(--spacing-sm);
        gap: var(--spacing-xs);
    }
    
    .brand-logo {
        width: 36px;
        height: 36px;
        flex-shrink: 0;
    }
    
    .brand-text {
        display: none; /* Hide brand text on very small screens */
    }
    
    .nav-actions {
        gap: var(--spacing-xs);
        align-items: center;
    }
    
    .btn-primary {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
        white-space: nowrap;
        min-width: 70px;
    }
    
    .btn-icon {
        width: 36px;
        height: 36px;
        padding: var(--spacing-xs);
        border-radius: var(--radius-sm);
        background: var(--bg-secondary);
        border: 1px solid var(--border-light);
        transition: all var(--transition-fast);
    }
    
    .btn-icon:hover {
        background: var(--bg-tertiary);
        transform: scale(1.05);
        border-color: var(--border-medium);
    }
    
    .btn-icon:active {
        transform: scale(0.95);
    }
    
    .btn-icon i {
        font-size: var(--font-size-sm);
    }
    
    /* Ensure navbar stays on top */
    .navbar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: var(--z-fixed);
        backdrop-filter: blur(10px);
        background: rgba(255, 255, 255, 0.95);
        border-bottom: 1px solid var(--border-light);
        padding: var(--spacing-sm) 0;
    }
    
    [data-theme="dark"] .navbar {
        background: rgba(30, 41, 59, 0.95);
    }
    
    .hero-section {
        padding: var(--spacing-2xl) var(--spacing-md);
        margin-top: 0;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .vent-form-section,
    .community-section,
    .streak-section,
    .safety-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .vent-form-card,
    .streak-card,
    .safety-card {
        padding: var(--spacing-xl);
        margin: 0 var(--spacing-md);
    }
    
    .mood-options {
        gap: var(--spacing-sm);
    }
    
    .mood-option {
        min-width: 60px;
        padding: var(--spacing-sm);
    }
    
    .calendar-grid {
        gap: var(--spacing-xs);
    }
    
    .safety-card {
        flex-direction: column;
        text-align: center;
    }
    
    .modal {
        padding: var(--spacing-md);
    }
    
    .modal-content {
        max-height: 95vh;
    }

    /* Responsive adjustments for vent cards */
    .vent-card {
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }
    
    .avatar-circle {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-md);
    }
    
    .vent-actions {
        gap: var(--spacing-md);
        padding-top: var(--spacing-xs);
        margin-top: var(--spacing-xs);
    }
    
    .action-btn {
        padding: var(--spacing-xs);
        font-size: var(--font-size-xs);
    }
    
    .user-info {
        gap: var(--spacing-xs);
    }
    
    .username {
        font-size: var(--font-size-sm);
    }
    
    .user-handle {
        font-size: var(--font-size-xs);
    }
    
    .vent-content {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    .vent-card::before {
        height: 2px;
    }
    
    /* Show bottom navigation on mobile */
    .bottom-nav {
        display: flex;
        justify-content: space-around;
    }
    
    /* Adjust main content padding for bottom nav */
    .main-content {
        padding-bottom: 100px;
    }
}

/* Medium Mobile Devices */
@media (max-width: 768px) and (min-width: 481px) {
    .nav-container {
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
    }
    
    .brand-text {
        display: none; /* Hide brand text on all mobile devices */
    }
    
    .brand-title {
        font-size: var(--font-size-lg);
    }
    
    .brand-subtitle {
        display: none; /* Hide subtitle on all mobile devices */
    }
    
    .btn-primary {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
        min-width: 70px;
    }
    
    .btn-icon {
        width: 40px;
        height: 40px;
        padding: var(--spacing-sm);
    }
    
    .nav-actions {
        gap: var(--spacing-xs);
    }
}

/* Large Mobile Devices */
@media (max-width: 1024px) and (min-width: 769px) {
    .nav-container {
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
    }
    
    .brand-text {
        display: none; /* Hide brand text on large mobile devices too */
    }
    
    .btn-primary {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-base);
        min-width: 80px;
    }
    
    .nav-actions {
        gap: var(--spacing-sm);
    }
}

/* General Mobile Responsiveness */
@media (max-width: 1024px) {
    .navbar {
        padding: var(--spacing-sm) 0;
    }
    
    .nav-container {
        gap: var(--spacing-sm);
    }
    
    .brand-logo {
        flex-shrink: 0;
    }
    
    .nav-actions {
        gap: var(--spacing-sm);
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-contrast: high) {
    :root {
        --border-light: #000000;
        --border-medium: #000000;
        --text-secondary: #000000;
    }
}

/* Focus Styles */
button:focus,
a:focus,
.mood-option:focus,
.filter-btn:focus,
.vent-action:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
} 

/* Mobile Menu Backdrop */
.mobile-menu-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    backdrop-filter: blur(4px);
}

.mobile-menu-backdrop.active {
    opacity: 1;
    visibility: visible;
}

/* Enhanced Mobile Navigation */
@media (max-width: 480px) {
    .mobile-menu {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    .mobile-menu-header {
        padding: var(--spacing-md);
    }
    
    .mobile-nav {
        padding: var(--spacing-md);
    }
    
    .mobile-nav-item {
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    .mobile-nav-item i {
        width: 20px;
        font-size: var(--font-size-base);
    }
    
    /* Improve touch targets */
    .btn-icon,
    .mobile-nav-item,
    .bottom-nav-item {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Better scrolling for mobile */
    html {
        scroll-behavior: smooth;
        -webkit-overflow-scrolling: touch;
    }
    
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-rendering: optimizeLegibility;
    }
    
    /* Improve mobile menu performance */
    .mobile-menu {
        will-change: transform;
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
    }
    
    /* Better mobile navigation */
    .mobile-nav-item {
        position: relative;
        overflow: hidden;
    }
    
    .mobile-nav-item::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 18, 239, 0.1), transparent);
        transition: left 0.5s ease;
    }
    
    .mobile-nav-item:hover::before {
        left: 100%;
    }
    
    /* Enhanced mobile buttons */
    .btn-primary,
    .btn-secondary {
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
        user-select: none;
    }
    
    .btn-primary:active,
    .btn-secondary:active {
        transform: scale(0.95);
    }
    
    /* Improve mobile form elements */
    input, button, textarea, select {
        font-size: 16px; /* Prevents zoom on iOS */
        -webkit-appearance: none;
        border-radius: 0;
    }
    
    /* Better mobile shadows */
    .navbar,
    .bottom-nav {
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    }
    
    /* Mobile-specific animations */
    .mobile-nav-item {
        animation: fadeInUp 0.3s ease-out;
        animation-fill-mode: both;
    }
    
    .mobile-nav-item:nth-child(1) { animation-delay: 0.1s; }
    .mobile-nav-item:nth-child(2) { animation-delay: 0.2s; }
    .mobile-nav-item:nth-child(3) { animation-delay: 0.3s; }
    .mobile-nav-item:nth-child(4) { animation-delay: 0.4s; }
}

/* Mobile Menu Slide Animation */
@keyframes slideInFromLeft {
    0% {
        transform: translateX(-100%);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutToLeft {
    0% {
        transform: translateX(0);
        opacity: 1;
    }
    100% {
        transform: translateX(-100%);
        opacity: 0;
    }
}

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

/* Mobile Menu State Management */
.mobile-menu {
    transition: transform var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu:not(.active) {
    transform: translateX(-100%);
}

/* Mobile Menu Item Hover Effects */
@media (hover: hover) {
    .mobile-nav-item:hover {
        background: var(--bg-secondary);
        transform: translateX(8px);
        border-color: var(--primary-color);
    }
    
    .mobile-nav-item:hover i {
        color: var(--primary-color);
        transform: scale(1.1);
    }
}

/* Mobile Menu Item Active States */
.mobile-nav-item:active {
    transform: scale(0.98);
    background: var(--bg-tertiary);
    transition: all 0.1s ease;
}

/* Mobile Menu Close Button Enhancement */
.mobile-menu-header .btn-icon {
    position: relative;
    overflow: hidden;
}

.mobile-menu-header .btn-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.mobile-menu-header .btn-icon:hover::before {
    width: 100%;
    height: 100%;
}

.mobile-menu-header .btn-icon:hover i {
    color: var(--text-inverse);
    z-index: 1;
    position: relative;
}