:root {
    --primary-color: #ffffff;
    --accent-color: #d05d28;
    --text-color: #ffffff;
    --border-color: rgba(255, 255, 255, 0.2);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', 'Inter', 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(120deg, #2f7e89 0%, #1a1a1a 100%);
    background-attachment: fixed;
    margin: 0;
    padding: 0;
}

.container-fluid {
    display: flex;
    min-height: 100vh;
    padding: 2rem 0;
}

.sidebar {
    width: 280px;
    background: transparent;
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo {
    width: 240px;
    height: auto;
    margin-bottom: 1.5rem;
    display: block;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.sidebar-logo:hover {
    opacity: 0.8;
    transform: scale(1.02);
}

.sidebar h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.sidebar .subtitle {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
}

.sidebar nav a {
    display: block;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    margin: 0.25rem 0;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    background: rgba(255, 255, 255, 0.1);
}

.sidebar nav a:hover {
    background: rgba(47, 126, 137, 0.5);
    color: #ffffff;
    transform: translateX(4px);
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #999;
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 3rem;
    max-width: 1100px;
}

#content {
    background: transparent;
    padding: 3rem;
}

#content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    text-align: center;
}

#content h1:first-child {
    margin-top: 0;
}

#content h2 {
    font-size: 1.875rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 2.5rem 0 1rem;
    padding-top: 1rem;
    text-align: center;
}

#content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 2rem 0 1rem;
    text-align: center;
}

#content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 1.5rem 0 0.75rem;
    text-align: center;
}

#content p {
    margin: 1rem 0;
    line-height: 1.7;
    text-align: left;
}

#content ul, #content ol {
    margin: 1rem 0;
    padding-left: 2rem;
    text-align: left;
}

#content li {
    margin: 0.5rem 0;
}

#content a {
    color: #eebd83;
    text-decoration: none;
}

#content a:hover {
    text-decoration: underline;
}

#content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5rem auto;
    border-radius: 4px;
}

/* Image width utilities */
#content img.w-25 { width: 25%; max-width: 25%; }
#content img.w-33 { width: 33%; max-width: 33%; }
#content img.w-50 { width: 50%; max-width: 50%; }
#content img.w-66 { width: 66%; max-width: 66%; }
#content img.w-75 { width: 75%; max-width: 75%; }
#content img.w-100 { width: 100%; max-width: 100%; }

#content code {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: #ffffff;
}

#content pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

#content pre code {
    background: transparent;
    padding: 0;
    color: #ffffff;
}

#content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

#content th, #content td {
    padding: 0.75rem;
    text-align: left;
    border: 1px solid var(--border-color);
}

#content th {
    background: rgba(47, 126, 137, 0.3);
    font-weight: 600;
}

#content tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

#content blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: rgba(255, 255, 255, 0.8);
    font-style: italic;
}

#content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

#content strong {
    font-weight: 600;
}

.loading {
    background: transparent;
    padding: 4rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px) {
    .container-fluid {
        padding: 1rem;
    }

    .sidebar {
        width: 100%;
        position: static;
        height: auto;
        padding: 1.5rem;
        margin-bottom: 2rem;
        background: rgba(0, 0, 0, 0.3);
        border-radius: 8px;
    }

    .sidebar nav a {
        background: rgba(255, 255, 255, 0.15);
    }

    .main-content {
        margin-left: 0;
        padding: 0;
    }

    #content {
        padding: 2rem 1.5rem;
    }

    .container-fluid {
        flex-direction: column;
    }
}

/* Index page styles */
.hero-section {
    text-align: center;
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.hero-logo {
    width: 400px;
    max-width: 90%;
    height: auto;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 3rem;
}

.manuals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.manual-card {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
}

.manual-card:hover {
    background: rgba(47, 126, 137, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.manual-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
    display: block;
}

.manual-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.manual-description {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.manual-meta {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.footer {
    text-align: center;
    padding: 3rem 2rem;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: var(--primary-color);
}

@media print {
    body {
        background: #fff;
        color: #000;
    }

    * {
        color: #000 !important;
    }

    .sidebar {
        display: none;
    }

    .main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 0;
    }

    #content {
        padding: 0;
    }
}