:root {
    /* Dark Mode Blue Palette */
    --bg-dark: #0d1117;
    --bg-card: #161b22;
    --bg-elevated: #21262d;
    --accent-primary: #2563eb;
    --accent-light: #3b82f6;
    --accent-glow: #60a5fa;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --success: #22c55e;
    --warning: #eab308;
    --error: #ef4444;
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #60a5fa 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== NAVIGATION ===== */
.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-light);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* ===== LAYOUT ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.page-header h1 {
    font-size: 2.75rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== CARDS ===== */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px rgba(37, 99, 235, 0.15);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
}

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background-color: var(--bg-elevated);
    color: var(--accent-light);
    border: 1px solid var(--accent-primary);
}

.btn-secondary:hover {
    background-color: rgba(37, 99, 235, 0.1);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--accent-light);
    background-color: var(--bg-elevated);
}

/* ===== GRID LAYOUTS ===== */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ===== FEED LAYOUT ===== */
.feed-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

.feed {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ===== POST COMPONENT ===== */
.post {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.post:hover {
    border-color: var(--accent-primary);
}

.post-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
    flex-shrink: 0;
}

.avatar-lg {
    width: 100px;
    height: 100px;
    font-size: 2.5rem;
}

.post-user-info h4 {
    color: var(--text-primary);
    font-weight: 600;
}

.post-user-info span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.post-content {
    padding: 0 1.25rem 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.post-image {
    width: 100%;
    height: 300px;
    background: var(--bg-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 3rem;
}

.post-stats {
    display: flex;
    gap: 2rem;
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.95rem;
}

.post-actions {
    display: flex;
    border-top: 1px solid var(--border-color);
}

.post-actions button {
    flex: 1;
    padding: 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.post-actions button:hover {
    background-color: var(--bg-elevated);
    color: var(--accent-light);
}

/* ===== SIDEBAR ===== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
}

.sidebar-card h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.sidebar-list {
    list-style: none;
}

.sidebar-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-list li:last-child {
    border-bottom: none;
}

.sidebar-list a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.sidebar-list a:hover {
    color: var(--accent-light);
}

/* ===== PROFILE ===== */
.profile-banner {
    background: var(--gradient-primary);
    height: 200px;
    border-radius: 16px;
    margin-bottom: -60px;
    position: relative;
}

.profile-info {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 2rem;
}

.profile-info .avatar {
    margin: 0 auto 1rem;
    border: 4px solid var(--bg-dark);
}

.profile-info h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.profile-info .bio {
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 1.5rem;
}

.profile-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0;
}

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

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-light);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* ===== WORKOUT CARDS ===== */
.workout-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.workout-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.15);
}

.workout-image {
    height: 180px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.workout-details {
    padding: 1.5rem;
}

.workout-details h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.workout-details p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.workout-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-primary {
    background-color: rgba(37, 99, 235, 0.15);
    color: var(--accent-light);
}

.badge-success {
    background-color: rgba(34, 197, 94, 0.15);
    color: var(--success);
}

.badge-warning {
    background-color: rgba(234, 179, 8, 0.15);
    color: var(--warning);
}

/* ===== LEADERBOARD ===== */
.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    transition: all 0.2s ease;
}

.leaderboard-item:hover {
    border-color: var(--accent-primary);
}

.rank {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--text-secondary);
}

.rank.gold {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #1a1a1a;
}

.rank.silver {
    background: linear-gradient(135deg, #9ca3af, #6b7280);
    color: #1a1a1a;
}

.rank.bronze {
    background: linear-gradient(135deg, #d97706, #b45309);
    color: white;
}

.leaderboard-info {
    flex: 1;
}

.leaderboard-info h4 {
    color: var(--text-primary);
    font-weight: 600;
}

.leaderboard-info span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.leaderboard-score {
    font-weight: 700;
    color: var(--accent-light);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ===== FEATURE SECTION ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

.feature-item {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 20px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.feature-item h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.footer-links {
    display: flex;
    gap: 2rem;
}

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

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .feed-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: none;
    }

    .grid-3,
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    .container {
        padding: 1rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .grid-2,
    .grid-3,
    .grid-4,
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .profile-stats {
        flex-wrap: wrap;
        gap: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

/* ===== GAMIFICATION SYSTEM ===== */

/* XP Bar */
.xp-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
}

.xp-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.level-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.level-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: #1a1a1a;
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.4);
}

.level-info h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.level-info span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.xp-stats {
    display: flex;
    gap: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.xp-stats strong {
    color: var(--accent-light);
}

.xp-bar-wrapper {
    position: relative;
}

.xp-bar-bg {
    height: 12px;
    background-color: var(--bg-elevated);
    border-radius: 6px;
    overflow: hidden;
}

.xp-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #2563eb, #60a5fa, #93c5fd);
    border-radius: 6px;
    transition: width 0.5s ease;
    box-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}

.xp-bar-text {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Weekly XP Tracker */
.weekly-xp {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin-top: 1rem;
}

.day-xp {
    text-align: center;
    padding: 0.5rem;
    background-color: var(--bg-elevated);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.day-xp.completed {
    border-color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.day-xp.today {
    border-color: var(--accent-primary);
    background: rgba(37, 99, 235, 0.15);
}

.day-xp .day-name {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.day-xp .day-points {
    font-weight: 700;
    color: var(--accent-light);
}

.day-xp.completed .day-points {
    color: var(--success);
}

/* Exercise Logger */
.exercise-logger {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.exercise-logger h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--accent-light);
}

.exercise-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: 1rem;
    align-items: end;
}

.exercise-form .form-group {
    margin-bottom: 0;
}

.exercise-list {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.exercise-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background-color: var(--bg-elevated);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    border-left: 3px solid var(--accent-primary);
}

.exercise-item .exercise-name {
    font-weight: 600;
    color: var(--text-primary);
}

.exercise-item .exercise-details {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.exercise-item .exercise-xp {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--success);
}

/* XP Popup Animation */
.xp-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: white;
    padding: 2rem 3rem;
    border-radius: 20px;
    text-align: center;
    z-index: 2000;
    box-shadow: 0 20px 60px rgba(37, 99, 235, 0.5);
    animation: popIn 0.3s ease;
}

@keyframes popIn {
    from {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

.xp-popup h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.xp-popup .xp-amount {
    font-size: 3rem;
    font-weight: 800;
}

/* Level Up Card */
.level-up-card {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #1a1a1a;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1.5rem;
    box-shadow: 0 0 40px rgba(251, 191, 36, 0.3);
}

.level-up-card h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.level-up-card .new-level {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
}

/* XP Post Badge */
.post-xp-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(96, 165, 250, 0.2));
    border: 1px solid var(--accent-primary);
    color: var(--accent-light);
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Progress Post */
.progress-post {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.progress-post:hover {
    border-color: var(--accent-primary);
}

.progress-header {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(96, 165, 250, 0.05));
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.progress-workout-summary {
    background-color: var(--bg-elevated);
    padding: 1rem 1.25rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    text-align: center;
}

.progress-stat {
    padding: 0.5rem;
}

.progress-stat .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-light);
}

.progress-stat .label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Rewards Panel */
.rewards-panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
}

.reward-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-elevated);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
}

.reward-item.locked {
    opacity: 0.5;
}

.reward-item.unlocked {
    border-color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.reward-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.reward-item.locked .reward-icon {
    background: var(--bg-card);
    filter: grayscale(1);
}

.reward-info h4 {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.reward-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.reward-level {
    margin-left: auto;
    font-weight: 600;
    color: var(--text-muted);
}

.reward-item.unlocked .reward-level {
    color: var(--success);
}

/* Streak Flame */
.streak-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.2), rgba(251, 191, 36, 0.1));
    border: 1px solid #f97316;
    border-radius: 25px;
    color: #fb923c;
    font-weight: 700;
}

.streak-display .flame {
    font-size: 1.25rem;
    animation: flicker 1s ease-in-out infinite alternate;
}

@keyframes flicker {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

/* Quest/Challenge Card */
.quest-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.quest-card.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.15);
}

.quest-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.quest-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.quest-title h4 {
    color: var(--text-primary);
}

.quest-title span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.quest-progress {
    margin-bottom: 0.75rem;
}

.quest-progress-bar {
    height: 8px;
    background-color: var(--bg-elevated);
    border-radius: 4px;
    overflow: hidden;
}

.quest-progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.quest-reward {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.quest-reward .xp {
    font-weight: 700;
    color: var(--accent-light);
}

/* ===== ADDITIONAL UTILITY CLASSES ===== */

/* Grid utilities */
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* Text colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-light); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-gold { color: #fbbf24; }
.text-orange { color: #fb923c; }
.text-purple { color: #a855f7; }
.text-red { color: #ef4444; }

/* Font sizes */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.85rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.1rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.75rem; }
.text-4xl { font-size: 2rem; }
.text-5xl { font-size: 2.5rem; }
.text-6xl { font-size: 3rem; }
.text-7xl { font-size: 3.5rem; }
.text-8xl { font-size: 4rem; }

/* Font weights */
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.p-10 { padding: 2.5rem; }

.pt-4 { padding-top: 1rem; }
.pb-4 { padding-bottom: 1rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }

/* Width/Height */
.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-sm { max-width: 450px; }
.max-w-md { max-width: 500px; }
.max-w-lg { max-width: 600px; }
.max-w-xl { max-width: 800px; }

/* Flexbox extensions */
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.shrink-0 { flex-shrink: 0; }

/* Borders */
.border { border: 1px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.border-l-3 { border-left: 3px solid; }
.border-l-accent { border-left-color: var(--accent-primary); }
.border-l-success { border-left-color: var(--success); }
.border-l-warning { border-left-color: var(--warning); }
.border-l-gold { border-left-color: #fbbf24; }
.border-accent { border-color: var(--accent-primary); }
.border-gold { border-color: #f97316; }
.rounded-lg { border-radius: 12px; }
.rounded-xl { border-radius: 16px; }
.rounded-2xl { border-radius: 20px; }
.rounded-full { border-radius: 50%; }

/* Backgrounds */
.bg-dark { background-color: var(--bg-dark); }
.bg-card { background-color: var(--bg-card); }
.bg-elevated { background-color: var(--bg-elevated); }
.bg-accent-subtle { background: rgba(37, 99, 235, 0.1); }
.bg-success-subtle { background: rgba(34, 197, 94, 0.1); }
.bg-gold-subtle { background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(251, 146, 60, 0.05)); }
.bg-gradient-primary { background: var(--gradient-primary); }
.bg-gradient-gold { background: linear-gradient(135deg, #fbbf24, #f59e0b); }
.bg-gradient-blue { background: linear-gradient(to top, #2563eb, #60a5fa); }
.bg-gradient-green { background: linear-gradient(to top, #16a34a, #4ade80); }
.bg-transparent { background: transparent; }

/* Opacity */
.opacity-50 { opacity: 0.5; }
.opacity-90 { opacity: 0.9; }

/* Line height */
.leading-normal { line-height: 1.6; }
.leading-relaxed { line-height: 1.8; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Lists */
.list-none { list-style: none; }

/* ===== AUTH PAGES ===== */
.auth-container {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container-padded {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.auth-card {
    max-width: 450px;
    width: 100%;
    padding: 2.5rem;
}

.auth-card-wide {
    max-width: 500px;
    width: 100%;
    padding: 2.5rem;
}

.auth-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-header-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.auth-header h1 {
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
}

.auth-header p {
    color: var(--text-muted);
}

.auth-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
}

.auth-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.auth-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.auth-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.auth-checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.auth-checkbox-label-start {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.auth-checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
}

.auth-checkbox-top {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--accent-primary);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.auth-divider-line {
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.auth-footer {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.auth-social-btn {
    padding: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.auth-social-icon {
    font-size: 1.25rem;
}

.xp-teaser {
    margin-top: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(251, 146, 60, 0.05));
    border-radius: 12px;
    border: 1px solid rgba(251, 191, 36, 0.2);
    text-align: center;
}

.xp-teaser p {
    color: #fbbf24;
    font-size: 0.9rem;
    margin: 0;
}

.bonus-banner {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(96, 165, 250, 0.05));
    border-radius: 12px;
    border: 1px solid var(--accent-primary);
    text-align: center;
}

.bonus-banner p {
    color: var(--accent-light);
    font-size: 0.95rem;
    margin: 0;
}

.benefits-list {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-elevated);
    border-radius: 12px;
}

.benefits-list h4 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.benefits-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.benefits-list li {
    padding: 0.35rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.check-icon {
    color: var(--success);
}

/* ===== ABOUT PAGE ===== */
.mission-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.mission-content {
    max-width: 800px;
    margin: 0 auto;
}

.mission-text {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.xp-how-card {
    text-align: center;
    border-top: 3px solid;
}

.xp-how-card.accent { border-top-color: var(--accent-primary); }
.xp-how-card.success { border-top-color: var(--success); }
.xp-how-card.gold { border-top-color: #f59e0b; }
.xp-how-card.red { border-top-color: #ef4444; }

.xp-how-icon {
    font-size: 3rem;
    margin-bottom: 0.75rem;
}

.xp-how-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.xp-how-badge {
    margin-top: 1rem;
    padding: 0.5rem;
    background: var(--bg-elevated);
    border-radius: 8px;
    font-weight: 600;
}

.level-tiers-card {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(251, 146, 60, 0.05));
    border-color: #f97316;
}

.level-tier {
    padding: 1rem;
    background: var(--bg-dark);
    border-radius: 12px;
}

.level-tier-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.level-tier-range {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.team-level-badge {
    justify-content: center;
    margin-bottom: 1rem;
}

.team-level-icon {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
}

.cta-card {
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-dark));
    border: 1px solid var(--accent-primary);
}

.cta-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== COMMUNITY PAGE ===== */
.stat-card-icon {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.featured-challenge {
    padding: 1.25rem;
    background: var(--gradient-primary);
    border-radius: 12px;
    margin-bottom: 1rem;
}

.challenge-badge {
    background: rgba(255,255,255,0.2);
    color: white;
}

.challenge-title {
    font-size: 1.25rem;
    margin: 0.5rem 0;
}

.challenge-desc {
    opacity: 0.9;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.challenge-join-btn {
    background: white;
    color: var(--accent-primary);
    padding: 0.5rem 1rem;
}

.challenge-item {
    padding: 1rem;
    background: var(--bg-elevated);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
}

.group-item {
    padding: 1rem;
    background: var(--bg-elevated);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.friend-activity-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.friend-activity-item:last-child {
    border-bottom: none;
}

.friend-avatar {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.friend-xp {
    color: var(--success);
    font-weight: 700;
    font-size: 0.9rem;
}

.level-up-tag {
    color: #fbbf24;
    font-weight: 700;
    font-size: 0.85rem;
}

.leaderboard-level-badge {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #000;
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
}

/* ===== WORKOUTS PAGE ===== */
.followed-exercise {
    padding: 1rem;
    background: var(--bg-elevated);
    border-radius: 12px;
    text-align: center;
}

.followed-exercise-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.followed-exercise-title {
    font-size: 0.95rem;
}

.exercise-card-header {
    display: flex;
    justify-content: space-between;
}

.exercise-card-footer {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.exercise-card-btn {
    flex: 1;
    padding: 0.5rem;
}

.xp-guide-card {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(251, 146, 60, 0.05));
    border-color: #f97316;
}

.xp-guide-item {
    padding: 1rem;
    background: var(--bg-dark);
    border-radius: 12px;
}

.xp-guide-rate {
    margin-top: 0.5rem;
    color: var(--success);
    font-weight: 600;
}

.xp-guide-title {
    margin-bottom: 1rem;
}

.xp-guide-subtitle {
    margin-bottom: 0.5rem;
}

/* Badge variants */
.badge-core {
    background: rgba(251, 146, 60, 0.15);
    color: #fb923c;
}

.badge-flexibility {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

/* Search input */
.search-input {
    padding: 0.5rem 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    width: 200px;
}

/* Following card */
.following-card {
    border: 1px solid var(--accent-primary);
}

/* Text colors for section headers */
.text-orange { color: #f59e0b; }

/* ===== PROFILE PAGE ===== */
.profile-level-badge {
    margin: 1rem auto;
    justify-content: center;
}

.profile-xp-bar {
    max-width: 500px;
    margin: 1.5rem auto;
}

.weekly-chart-bar {
    height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
}

.weekly-chart-fill {
    width: 40px;
    border-radius: 6px 6px 0 0;
}

.activity-item {
    padding: 1rem;
    background: var(--bg-elevated);
    border-radius: 12px;
    border-left: 3px solid;
    margin-bottom: 1rem;
}

.activity-item:last-child {
    margin-bottom: 0;
}

.activity-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.25rem;
}

.activity-title {
    font-weight: 600;
}

.activity-time {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.activity-desc {
    color: var(--text-secondary);
    margin: 0.5rem 0;
}

.activity-stats {
    display: flex;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.level-up-activity {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.15), rgba(251, 191, 36, 0.05));
    border-left-color: #fbbf24;
}

.achievement-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.achievement-item {
    padding: 1rem;
    background: var(--bg-elevated);
    border-radius: 12px;
    text-align: center;
}

.achievement-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.achievement-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.achievement-desc {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===== INDEX/HOME PAGE ===== */
.sidebar-xp-bonus {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(251, 146, 60, 0.05));
    border-color: #f97316;
}

.xp-bonus-item {
    padding: 0.5rem;
    background: var(--bg-elevated);
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.xp-bonus-item:last-child {
    margin-bottom: 0;
}

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

.xp-bonus-value {
    font-weight: 700;
    color: #fb923c;
}

.sidebar-leaderboard-item {
    padding: 0.75rem;
}

.sidebar-leaderboard-you {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--accent-primary);
}

.sidebar-rank {
    width: 28px;
    height: 28px;
    font-size: 0.85rem;
}

.sidebar-rank-you {
    background: var(--accent-primary);
    color: white;
}

.sidebar-reward-item {
    padding: 0.75rem;
}

.sidebar-reward-icon {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
}

.weekly-challenge-box {
    padding: 1rem;
    background: var(--bg-elevated);
    border-radius: 12px;
}

/* ===== NAV AUTH BUTTONS ===== */
.nav-auth-btn {
    padding: 0.5rem 1rem;
}

@media (max-width: 768px) {
    .grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .achievement-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .exercise-form {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .grid-5 {
        grid-template-columns: 1fr;
    }
}