:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --success: #10b981;
    --success-dark: #059669;
    --text: #1f2937;
    --text-light: #6b7280;
    --background: #f8fafc;
    --white: #ffffff;
    --border: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.5;
}

header {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    padding: 2rem 1.5rem;
    margin-bottom: 2rem;
    border-radius: 0 0 1.5rem 1.5rem;
    box-shadow: var(--shadow-lg);
}

h1, h2, h3 {
    color: var(--white);
    font-weight: 700;
    letter-spacing: -0.025em;
}

nav ul {
    list-style-type: none;
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 1rem;
}

nav ul li a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease-in-out;
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

section {
    background: var(--white);
    padding: 1.5rem;
    margin: 1rem auto;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    max-width: 1200px;
}

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

h2 {
    color: var(--text);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin: 1rem 0 0.5rem;
    color: var(--text);
    font-weight: 500;
}

input[type="number"],
input[type="text"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    background-color: var(--white);
    transition: all 0.2s ease;
    font-size: 1rem;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

button {
    background-color: var(--success);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

button:hover {
    background-color: var(--success-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.5rem 0;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

th, td {
    padding: 1rem;
    text-align: left;
    border: 1px solid var(--border);
}

th {
    background-color: var(--primary);
    color: var(--white);
    font-weight: 600;
}

td {
    background-color: var(--white);
    transition: background-color 0.2s ease;
}

tr:hover td {
    background-color: #f8fafc;
}

#forum-display,
#portfolio-display {
    display: grid;
    gap: 1rem;
    margin-top: 1.5rem;
}

#forum-display div,
#portfolio-display div {
    background: var(--white);
    padding: 1.25rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

#forum-display div:hover,
#portfolio-display div:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#resource-list ul {
    list-style: none;
    display: grid;
    gap: 0.75rem;
}

#resource-list ul li {
    padding: 0.5rem 0;
}

#resource-list a {
    color: var(--primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

#resource-list a:hover {
    color: var(--primary-light);
    transform: translateX(4px);
}

@media (max-width: 768px) {
    header {
        border-radius: 0;
    }
    
    section {
        margin: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
}