:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-accent: #f1f3f5;
    --text-primary: #1a1d23;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --accent-primary: #0ea5e9;
    --accent-secondary: #06b6d4;
    --accent-dark: #0284c7;
    --status-critical: #dc2626;
}

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

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.status-badge {
    display: inline-block;
    background: var(--status-critical);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.announcement-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.main-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    line-height: 1.3;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--accent-primary);
}

.greeting {
    margin-bottom: 1.5rem;
}

.greeting p {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.intro-text {
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-left: 4px solid var(--accent-primary);
    border-radius: 4px;
}

.intro-text p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.section {
    margin-bottom: 2.5rem;
}

.section h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

.section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.section ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1rem;
}

.section ul li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.7;
}

.section ul li::before {
    content: '•';
    position: absolute;
    left: 0.5rem;
    color: var(--accent-primary);
    font-weight: bold;
    font-size: 1.2rem;
}

.highlight-section {
    background: var(--bg-accent);
    padding: 2rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.important-box {
    background: linear-gradient(135deg, var(--accent-dark), var(--accent-primary));
    color: white;
    padding: 1.75rem;
    border-radius: 6px;
    margin-top: 1.5rem;
    line-height: 1.7;
}

.important-box strong {
    font-weight: 700;
    font-size: 1.05rem;
}

.highlight-date {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 1.1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    font-family: 'JetBrains Mono', monospace;
}

.note {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.95rem;
}

.subsection {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 6px;
    border-left: 3px solid var(--accent-secondary);
}

.subsection h4 {
    margin-top: 0;
}

.contact-section {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.contact-box {
    background: var(--bg-primary);
    padding: 1.75rem;
    border-radius: 6px;
    margin-top: 1.5rem;
    border: 1px solid var(--border-color);
}

.contact-box p {
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.contact-label {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 150px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.contact-item a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.contact-item a:hover {
    color: var(--accent-dark);
    text-decoration: underline;
}

.farewell {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-accent);
    border-radius: 6px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.farewell p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.signature {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-top: 1.5rem;
    font-weight: 500;
}

.signature strong {
    font-weight: 700;
    font-size: 1.15rem;
    display: block;
    margin-top: 0.25rem;
}

.footer {
    text-align: center;
    padding: 2rem 0 1rem;
    margin-top: 3rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }
    
    .announcement-card {
        padding: 2rem 1.5rem;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .main-title {
        font-size: 1.5rem;
    }
    
    .section h3 {
        font-size: 1.2rem;
    }
    
    .contact-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .contact-label {
        min-width: auto;
        font-size: 0.85rem;
    }
    
    .contact-item a {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.75rem;
    }
    
    .status-badge {
        font-size: 0.7rem;
        padding: 0.4rem 1rem;
    }
    
    .main-title {
        font-size: 1.25rem;
    }
    
    .announcement-card {
        padding: 1.5rem 1rem;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
    }
    
    .announcement-card {
        border: none;
        box-shadow: none;
    }
    
    .status-badge {
        border: 2px solid var(--status-critical);
    }
}