:root {
    --primary-color: #424242;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 2rem;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

h1, h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
}

/* Navigation */
.nav {
    background: var(--card-bg);
    padding: 1rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    margin-bottom: 2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
    background: transparent;
}

.nav-links a:hover {
    background: rgba(66, 66, 66, 0.1);
    color: var(--primary-color);
}

.nav-links a.active {
    background: #424242;
    color: white;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Classpage Specific */
.info, .meta {
    width: 100%;
    max-width: 800px;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    transition: transform 0.2s;
}

.info:hover {
    transform: translateY(-2px);
}

.info strong {
    color: var(--primary-color);
    display: inline-block;
    width: 100px;
}

.meta {
    font-size: 0.9rem;
    color: #666;
}

.container {
    width: 100%;
    max-width: 800px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.column {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.column:hover {
    transform: translateY(-2px);
}

/* Contact Form */
.contact-form {
    width: 400px;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

/* Calendar Styles */
.calendar {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 2rem;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.calendar-header {
    text-align: center;
    margin-bottom: 2rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1rem;
    text-align: center;
}

.calendar-day-header {
    font-weight: 600;
    color: var(--primary-color);
    padding: 0.5rem;
}

.calendar-day {
    padding: 1rem;
    border-radius: 6px;
    background: var(--bg-color);
    transition: all 0.2s;
}

.calendar-day:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.calendar-day.current {
    background: #424242;
    color: white;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Results Page */
.results-card {
    width: 400px;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.results-group {
    margin-bottom: 1.5rem;
}

.results-group:last-child {
    margin-bottom: 0;
}

.results-label {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.results-value {
    background: var(--bg-color);
    padding: 0.75rem;
    border-radius: 6px;
    word-break: break-word;
}

.timestamp {
    font-size: 0.9rem;
    color: #666;
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

/* Buttons */
button {
    background: #424242;
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    margin-top: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

button:hover {
    background: #2d2d2d;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 0;
    }
    
    .nav {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-brand {
        margin-bottom: 1rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        text-align: center;
    }

    .main-content {
        margin: 1rem auto;
    }

    .contact-form,
    .results-card {
        width: 100%;
        margin: 0 1rem;
    }

    .calendar {
        margin: 0 1rem;
        padding: 1rem;
    }

    .calendar-grid {
        gap: 0.5rem;
    }

    .calendar-day {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

    .info,
    .meta,
    .container {
        margin-left: 1rem;
        margin-right: 1rem;
    }
}