:root {
    --primary: #2563EB;
    --secondary: #3B82F6;
    --cta: #F97316;
    --bg: #EFF6FF;
    --text: #1E40AF;
    --white: #FFFFFF;
    --gray-200: #E2E8F0;
}

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

body {
    font-family: 'Fira Sans', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

h1, h2, h3, .metric {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
}

/* Layout */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.main-header {
    background-color: var(--white);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

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

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

.btn, .btn-login {
    background-color: var(--cta);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.btn:hover, .btn-login:hover {
    background-color: #ea580c;
    transform: translateY(-2px);
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.card:hover {
    border-color: var(--secondary);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

/* Scoreboard */
.user-score {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.user-score:last-child {
    border-bottom: none;
}

.user-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.progress-bar-container {
    width: 100%;
    background-color: var(--gray-200);
    border-radius: 9999px;
    height: 12px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary);
    border-radius: 9999px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.score-stats {
    text-align: right;
}

.metric {
    font-size: 1.5rem;
    color: var(--cta);
}

/* Animations */
.fade-up {
    opacity: 0;
    animation: fadeUpAnim 0.6s ease forwards;
}

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

.task-feed {
    margin-top: 2rem;
}

.task-item {
    background-color: var(--white);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    border-left: 4px solid var(--cta);
    opacity: 0;
    animation: fadeUpAnim 0.5s ease forwards;
}

/* Staggered animation delays for feed */
.task-item:nth-child(1) { animation-delay: 0.1s; }
.task-item:nth-child(2) { animation-delay: 0.2s; }
.task-item:nth-child(3) { animation-delay: 0.3s; }
.task-item:nth-child(4) { animation-delay: 0.4s; }
.task-item:nth-child(5) { animation-delay: 0.5s; }

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-family: 'Fira Sans', sans-serif;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        display: none; 
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 1rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        gap: 1rem;
    }
    
    .nav-links.active {
        display: flex;
    }
}