:root {
    /* Color Palette - Vibrant Gradients */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* Solid Colors */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #f5576c;
    --success: #00f2fe;
    --warning: #fee140;

    /* Dark Theme */
    --bg-primary: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252541;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b4b4c8;
    --text-muted: #7a7a8c;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.5);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(245, 87, 108, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(0, 242, 254, 0.1) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundPulse 15s ease-in-out infinite;
}

@keyframes backgroundPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

/* Screen Management */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: block;
}

/* Authentication Screen */
#auth-screen {
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    overflow-y: auto;
}

#auth-screen.active {
    display: flex;
}

.auth-container {
    width: 100%;
    max-width: 480px;
    animation: fadeInUp 0.6s ease;
}

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

.app-title {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {

    0%,
    100% {
        filter: drop-shadow(0 0 10px rgba(102, 126, 234, 0.5));
    }

    50% {
        filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.8));
    }
}

.app-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.auth-form {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--glass-shadow);
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeInUp 0.4s ease;
}

.auth-form h2 {
    margin-bottom: var(--spacing-lg);
    font-size: 1.8rem;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* Role Selector */
.role-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.role-option {
    cursor: pointer;
}

.role-option input[type="radio"] {
    display: none;
}

.role-card {
    background: var(--bg-tertiary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.role-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.role-option input[type="radio"]:checked+.role-card {
    background: var(--primary-gradient);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

.role-icon {
    font-size: 2.5rem;
}

.role-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.role-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.role-option input[type="radio"]:checked+.role-card .role-desc {
    color: rgba(255, 255, 255, 0.9);
}

/* Buttons */
.btn {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    -webkit-transition: .4s;
    transition: .4s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 3px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked+.slider {
    background-color: var(--success);
}

input:focus+.slider {
    box-shadow: 0 0 1px var(--success);
}

input:checked+.slider:before {
    -webkit-transform: translateX(24px);
    -ms-transform: translateX(24px);
    transform: translateX(24px);
}

/* Rounded sliders */
.slider.round {
    border-radius: 24px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Task Quick Actions */
.task-quick-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--bg-tertiary);
}

.active-timer {
    border-left: 4px solid var(--accent);
    background: linear-gradient(90deg, rgba(88, 86, 214, 0.1) 0%, rgba(30, 30, 30, 0) 100%);
}

.timer-badge {
    background: var(--accent);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-left: 5px;
}

.pulsing {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }

    100% {
        opacity: 1;
    }
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
}

.btn-success {
    background: var(--success-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1.125rem 2rem;
    font-size: 1.125rem;
}

.auth-switch {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.auth-switch a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Main Navigation */
.main-nav {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
    flex: 1;
    justify-content: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.625rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-weight: 500;
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-link.active {
    color: var(--text-primary);
    background: var(--primary-gradient);
}

.nav-icon {
    font-size: 1.2rem;
}

.notification-badge {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    background: #dc2626;
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: 5px;
    min-width: 18px;
    text-align: center;
}

/* Notifications View */
.notifications-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.notifications-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.notification-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    gap: 15px;
    align-items: flex-start;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.notification-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
    border-color: rgba(99, 102, 241, 0.3);
}

.notification-card.unread {
    background: rgba(99, 102, 241, 0.1);
    border-left: 4px solid var(--primary-color);
}

.notification-icon {
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.notification-content {
    flex: 1;
}

.notification-content h3 {
    margin: 0 0 5px 0;
    font-size: 1.1rem;
    color: white;
}

.notification-content p {
    margin: 0 0 8px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.4;
}

.notification-time {
    font-size: 0.8rem;
    color: #64748b;
}

.unread-dot {
    width: 10px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 50%;
    margin-top: 10px;
    box-shadow: 0 0 10px var(--primary-glow);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 1.1rem;
}

/* Badge Notify (Nav) */
.badge-notify {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #ef4444;
    color: white;
    font-size: 0.7rem;
    font-weight: bold;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    border: 2px solid #0f172a;
}

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

/* Views */
.view {
    display: none;
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.view.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.view-header h1 {
    font-size: 2rem;
    font-weight: 700;
}

/* Dashboard */
.dashboard-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.stats-header {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.level-card {
    background: var(--primary-gradient);
}

.xp-card {
    background: var(--success-gradient);
}

.streak-card {
    background: var(--warning-gradient);
}

.tasks-card {
    background: var(--secondary-gradient);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
}

.stat-sublabel {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: var(--spacing-xs);
}

.xp-progress {
    margin-top: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.2);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.xp-progress-bar {
    height: 100%;
    background: white;
    border-radius: 4px;
    transition: width var(--transition-normal);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.xp-next {
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    opacity: 0.9;
}

/* Section */
.section {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.section h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

/* Badges */
.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.badge-item {
    background: var(--bg-tertiary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.badge-item:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.badge-item.unlocked {
    background: var(--primary-gradient);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {

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

    50% {
        transform: scale(1.05);
    }
}

.badge-item.locked {
    opacity: 0.4;
    filter: grayscale(1);
}

.badge-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.badge-name {
    font-size: 0.875rem;
    font-weight: 600;
    display: block;
    margin-bottom: 0.25rem;
}

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

/* Tasks */
.task-filters {
    display: flex;
    gap: var(--spacing-sm);
}

.filter-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
}

.filter-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

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

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

.task-item {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.task-item:hover {
    transform: translateX(4px);
    border-color: var(--primary);
    background: var(--bg-card-hover);
}

.task-item.completed {
    opacity: 0.6;
}

.task-item.completed .task-title {
    text-decoration: line-through;
}

.task-difficulty {
    width: 4px;
    height: 100%;
    border-radius: 2px;
    align-self: stretch;
}

.task-difficulty.facile {
    background: var(--success);
}

.task-difficulty.moyen {
    background: var(--warning);
}

.task-difficulty.difficile {
    background: var(--secondary);
}

.task-content {
    flex: 1;
}

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

.task-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.task-points {
    background: var(--primary-gradient);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 700;
}

.task-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.task-meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Profile */
.profile-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.profile-header {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 800;
    margin: 0 auto var(--spacing-md);
    box-shadow: var(--shadow-glow);
}

.profile-header h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.profile-role {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
}

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

.profile-stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.profile-stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats-grid {
    display: grid;
    gap: var(--spacing-md);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

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

.stat-item-value {
    font-weight: 600;
}

/* Messages */
.messages-container {
    height: calc(100vh - 160px);
    max-width: 1000px;
    margin: 0 auto;
}

.messages-container.single-chat .chat-area {
    height: 100%;
    border-radius: var(--radius-lg);
}

.conversations-list {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    overflow-y: auto;
}

.conversations-list h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.conversation-item {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.conversation-item:hover {
    background: var(--bg-card-hover);
}

.conversation-item.active {
    background: var(--primary-gradient);
}

.conversation-item.unread::after {
    content: '';
    position: absolute;
    top: 50%;
    right: var(--spacing-sm);
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--secondary);
    border-radius: 50%;
}

.conversation-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.conversation-preview {
    font-size: 0.875rem;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-area {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
}

.chat-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.chat-active {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

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

.chat-messages {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    box-sizing: border-box;
}

.message {
    max-width: 80%;
    /* Slightly smaller to ensure fit on mobile */
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    animation: messageSlideIn 0.3s ease;
    position: relative;
    word-break: break-word;
    box-sizing: border-box;
    /* Explicitly ensure padding doesn't push width */
}

.message-sender {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2px;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.sent {
    align-self: flex-end;
    background: var(--primary-gradient);
    border-bottom-right-radius: 4px;
    margin-left: auto;
    /* Force alignment backup */
}

.message.received {
    align-self: flex-start;
    background: var(--bg-tertiary);
    border-bottom-left-radius: 4px;
}

.message.kudos {
    background: var(--warning-gradient);
    text-align: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.message-content {
    margin-bottom: 0.25rem;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.7;
}

.chat-input {
    padding: var(--spacing-md);
    border-top: 1px solid var(--glass-border);
    display: flex;
    gap: var(--spacing-sm);
}

.chat-input input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
}

.chat-input input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Players Grid (Supporter) */
.players-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.player-card {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.player-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.player-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.player-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.player-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.player-level {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.player-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.player-stat {
    display: flex;
    justify-content: space-between;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h2 {
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--secondary);
}

.modal-content form {
    padding: var(--spacing-lg);
}

.task-detail-content {
    padding: var(--spacing-lg);
}

.task-detail-info {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
}

.info-label {
    color: var(--text-secondary);
}

.task-timer {
    margin-top: var(--spacing-lg);
    text-align: center;
}

.timer-display {
    font-size: 3rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.timer-controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Celebration Overlay */
.celebration-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    pointer-events: none;
}

.celebration-overlay.active {
    display: block;
}

#confetti-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.celebration-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.xp-gain {
    font-size: 4rem;
    font-weight: 800;
    background: var(--success-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: xpGainAnimation 1s ease;
}

@keyframes xpGainAnimation {
    0% {
        opacity: 0;
        transform: translateY(50px) scale(0.5);
    }

    50% {
        opacity: 1;
        transform: translateY(0) scale(1.2);
    }

    100% {
        opacity: 0;
        transform: translateY(-50px) scale(1);
    }
}

.level-up {
    font-size: 3rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: levelUpAnimation 1.5s ease;
}

@keyframes levelUpAnimation {
    0% {
        opacity: 0;
        transform: scale(0);
    }

    50% {
        opacity: 1;
        transform: scale(1.3);
    }

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

.badge-unlock {
    font-size: 2.5rem;
    animation: badgeUnlockAnimation 1s ease;
}

@keyframes badgeUnlockAnimation {
    0% {
        opacity: 0;
        transform: rotateY(90deg);
    }

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

/* Admin Dashboard */
.admin-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-lg);
    font-style: italic;
}

.user-card {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
}

.user-card.pending {
    border-color: var(--warning);
    background: rgba(254, 225, 64, 0.05);
}

.user-card:hover {
    transform: translateY(-2px);
    background: var(--bg-card-hover);
}

.user-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.user-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.user-role-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
}

.user-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.badgex {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
}

.badge-success {
    background: rgba(0, 242, 254, 0.1);
    color: #00f2fe;
}

.badge-warning {
    background: rgba(254, 225, 64, 0.1);
    color: #fee140;
}

.auth-link {
    text-align: center;
    margin-top: var(--spacing-sm);
}

.auth-link a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.auth-link a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-nav {
        padding: var(--spacing-sm) var(--spacing-md);
        justify-content: space-between;
        /* Remove backdrop-filter to prevent creating a containing block for fixed children */
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: var(--bg-secondary);
        /* Solid background for legibility */
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-brand h1 {
        font-size: 1.25rem;
    }

    .nav-links {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: var(--bg-secondary);
        backdrop-filter: blur(15px);
        border-top: 1px solid var(--glass-border);
        padding: var(--spacing-xs) 0;
        justify-content: space-around;
        gap: 0;
        z-index: 1000;
        box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.3);
    }

    .nav-link {
        flex-direction: column;
        gap: 2px;
        padding: 8px 4px;
        font-size: 0.65rem;
        flex: 1;
        border-radius: 0;
        background: transparent !important;
    }

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

    .nav-link.active::after {
        content: '';
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--primary);
        border-radius: 0 0 4px 4px;
    }

    .nav-icon {
        font-size: 1.4rem;
    }

    .nav-label {
        display: block;
    }

    /* Hide text labels for very small screens if needed, but here we keep them small */
    .nav-links span:not(.nav-icon):not(.badge-notify) {
        font-size: 0.6rem;
    }

    .nav-user {
        gap: var(--spacing-sm);
    }

    #user-name {
        display: none;
        /* Hide name on mobile header to save space */
    }

    /* Fix mobile height and overflow */
    #app-screen.active {
        height: 100vh;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }

    .view {
        flex: 1;
        overflow-y: auto;
        padding-bottom: 80px !important;
        -webkit-overflow-scrolling: touch;
    }

    .messages-container {
        height: 100%;
        padding: 0;
        width: 100%;
        overflow-x: hidden;
    }

    .chat-area {
        height: 100% !important;
        border-radius: 0 !important;
        border: none !important;
        width: 100% !important;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .chat-messages {
        padding: var(--spacing-sm);
        padding-right: 2rem !important;
        /* Extra safety for sent messages */
        width: 100%;
        box-sizing: border-box;
    }

    .message {
        max-width: 75%;
        /* Safer for narrow screens */
    }

    .message.sent {
        margin-left: auto;
        margin-right: 0;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: 2.5rem;
    }

    .stats-header {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .stat-card {
        padding: var(--spacing-sm);
        min-height: auto;
    }

    .xp-card {
        grid-column: span 2;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .view {
        padding: var(--spacing-sm);
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}