/* GLOBAL STYLES & VARIABLES */
:root {
  --md-primary: #1976d2;
  --md-primary-light: #63a4ff;
  --md-primary-dark: #004ba0;
  --md-background: #ffffff;
  --md-surface: #ffffff;
  --md-on-surface: #212121;
  --md-text-secondary: #616161;
  --md-divider: #e0e0e0;
  --md-card-shadow: 0 2px 6px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.15);
}

* {
  box-sizing: border-box;
}

body {
    background: linear-gradient(45deg, #ff89b5, #89cff0);
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
}

/* NAVIGATION BAR */
nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    padding: 10px 20px;
    z-index: 100;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

nav ul li {
    margin: 0 5px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 1.1em;
    font-weight: bold;
    padding: 10px 15px;
    border-radius: 25px;
    transition: background-color 0.3s;
    white-space: nowrap;
    display: block;
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* HOME PAGE (index.html) SPECIFIC STYLES */
.home-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    text-align: center;
    color: white;
}

.home-main h1 {
    font-size: 3rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    animation: fadeIn 2s ease-in-out;
}

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


/* CONTENT PAGES (dclasse.html) SPECIFIC STYLES */
.container {
    max-width: 960px;
    margin: 100px auto 30px; /* Top margin to avoid nav */
    padding: 24px 32px;
    background-color: var(--md-background);
    color: var(--md-on-surface);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    line-height: 1.6;
}

.container h1 {
    font-weight: 400;
    font-size: 2.5rem;
    color: var(--md-primary-dark);
    text-align: center;
    margin: 0 0 32px;
    letter-spacing: -0.5px;
}

.container h2 {
    font-weight: 500;
    font-size: 1.75rem;
    color: var(--md-primary);
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--md-divider);
}

.container h3 {
    font-weight: 500;
    font-size: 1.375rem;
    margin: 24px 0 12px;
    color: var(--md-primary-dark);
}

.container h4 {
    font-weight: 500;
    font-size: 1.125rem;
    margin: 20px 0 10px;
    color: var(--md-primary);
}

.container p, .container ul, .container ol {
    margin: 16px 0;
    font-weight: 400;
}

.container ul, .container ol {
    padding-left: 24px;
}

.container li {
    margin-bottom: 8px;
}

.container code {
    background-color: #f0f0f0;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9em;
    color: #d32f2f;
}

.container .note {
    background-color: #e3f2fd;
    border-left: 4px solid var(--md-primary);
    padding: 16px;
    margin: 24px 0;
    border-radius: 0 4px 4px 0;
    font-size: 0.95rem;
}

.container .diagram-container {
    background: var(--md-surface);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--md-card-shadow);
    margin: 28px 0;
    text-align: center; /* Centers the mermaid diagram */
}

.container .relationship-card {
    background: #f8fbff;
    border-left: 4px solid var(--md-primary-light);
    padding: 18px;
    margin: 20px 0;
    border-radius: 0 6px 6px 0;
}

.container .relationship-card h4 {
    margin-top: 0;
    color: var(--md-primary-dark);
}

.container table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--md-surface);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--md-card-shadow);
}

.container th {
    background-color: var(--md-primary);
    color: white;
    text-align: left;
    padding: 12px 16px;
    font-weight: 500;
}

.container td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--md-divider);
}

.container tr:last-child td {
    border-bottom: none;
}

/* RESPONSIVE STYLES */
@media (max-width: 600px) {
    .container h1 { font-size: 2rem; }
    .home-main h1 { font-size: 2.2rem; }
    .container h2 { font-size: 1.5rem; }
    .container { padding: 16px; }
}