/* -------------------------------------------------------------
 * Ragnar CSS Design System (Light Mode)
 * Colors derived from Ragnar Viking Logo:
 * - Primary Teal: #117992
 * - Accent Coral: #FB7653
 * - Deep Slate: #06394F
 * ------------------------------------------------------------- */

:root {
    --color-primary: #117992;
    --color-primary-light: #e7f2f4;
    --color-accent: #FB7653;
    --color-accent-light: #fff1ed;
    --color-dark-slate: #06394F;
    --color-text: #2c4a57;
    --color-text-light: #5a7684;
    
    --bg-main: #f3f7f8;
    --bg-card: #ffffff;
    --bg-code: #f8fafb;
    --border-color: #e2ecf0;
    
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    --sidebar-width: 280px;
    --border-radius: 12px;
    --transition-speed: 0.2s;
    --box-shadow: 0 4px 20px rgba(6, 57, 79, 0.05);
    --box-shadow-hover: 0 8px 30px rgba(6, 57, 79, 0.1);
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: #cbdce2;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #a5c2cc;
}

/* Site Layout Container */
.site-container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    min-height: 100vh;
}

/* Left Sidebar Navigation */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-card);
    border-right: 2px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo-container {
    background-color: transparent;
    padding: 0.5rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.25rem;
}

.sidebar-logo {
    max-width: 190px;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.nav-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-group-title {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-dark-slate);
    font-weight: 700;
    padding-left: 0.75rem;
    opacity: 0.85;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.menu-item {
    display: block;
    padding: 0.6rem 0.75rem;
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 8px;
    transition: all var(--transition-speed) ease;
}

.menu-item:hover {
    background-color: var(--bg-main);
    color: var(--color-primary);
    padding-left: 1rem;
}

.menu-item.active {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 600;
    padding-left: 1rem;
    border-left: 4px solid var(--color-primary);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.sidebar-footer {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-speed) ease;
}

.github-link:hover {
    color: var(--color-dark-slate);
}

.github-icon {
    fill: currentColor;
    transition: transform var(--transition-speed) ease;
}

.github-link:hover .github-icon {
    transform: rotate(5deg) scale(1.05);
}

/* Mobile Nav Toggle Button */
.mobile-nav-toggle {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--color-primary);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(17, 121, 146, 0.3);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

.mobile-nav-toggle .bar {
    width: 22px;
    height: 2.5px;
    background-color: #ffffff;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-nav-toggle.open .bar:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}

.mobile-nav-toggle.open .bar:nth-child(2) {
    opacity: 0;
}

.mobile-nav-toggle.open .bar:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

/* Main Content Area */
.content-area {
    flex-grow: 1;
    padding: 3rem 2.5rem;
    max-width: calc(1400px - var(--sidebar-width));
}

.content-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Cards & Layout Items */
.card {
    background-color: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    box-shadow: var(--box-shadow);
    transition: box-shadow var(--transition-speed) ease;
}

.card:hover {
    box-shadow: var(--box-shadow-hover);
}

/* Headings */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--color-dark-slate);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.25;
}

h1 {
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

h1::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    margin-top: 0.5rem;
    border-radius: 2px;
}

h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.4rem;
}

h3 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
}

.tagline {
    font-size: 1.15rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 2rem;
}

p {
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
    color: var(--color-text);
}

strong {
    color: var(--color-dark-slate);
}

.teal-text {
    color: var(--color-primary);
}

/* Lists */
.features-list {
    margin-left: 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.features-list li {
    font-size: 1.05rem;
    position: relative;
    list-style: none;
    padding-left: 1.25rem;
}

.features-list li::before {
    content: "•";
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.2rem;
    position: absolute;
    left: 0;
    top: -2px;
}

/* Custom Notification Banner Box */
.banner-box {
    background-color: var(--color-accent-light);
    border-left: 4px solid var(--color-accent);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.banner-box h3 {
    margin-top: 0;
    color: var(--color-dark-slate);
}

/* Code block structures */
.code-wrapper {
    position: relative;
    margin: 1.25rem 0;
}

pre {
    background-color: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--color-dark-slate);
}

code {
    font-family: var(--font-mono);
    background-color: rgba(17, 121, 146, 0.06);
    color: var(--color-primary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
}

/* Code Copy Button */
.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.35rem 0.75rem;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(6, 57, 79, 0.05);
    transition: all var(--transition-speed) ease;
}

.copy-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.copy-btn.copied {
    color: #ffffff;
    border-color: #2e7d32;
    background-color: #2e7d32;
}

/* Custom styled sections in Code Blocks for Readability */
/* Rebol comments */
.code-wrapper code .comment,
.code-wrapper code::after {
    color: #8c9fa8;
}


/* Inline Code links */
.card a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: border-bottom var(--transition-speed) ease;
}

.card a:hover {
    border-bottom-color: var(--color-primary);
}

/* Mobile Header (Hidden on Desktop) */
.mobile-header {
    display: none;
}

/* Sidebar Backdrop Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(6, 57, 79, 0.4);
    z-index: 98;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Responsive Rules */
@media (max-width: 900px) {
    .mobile-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 60px;
        background-color: var(--bg-card);
        border-bottom: 2px solid var(--border-color);
        padding: 0 1.25rem;
        z-index: 100;
    }
    
    .mobile-logo {
        height: 32px;
        width: auto;
        object-fit: contain;
    }

    .mobile-nav-toggle {
        display: flex;
        background: transparent;
        border: none;
        cursor: pointer;
        width: 40px;
        height: 40px;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        border-radius: 8px;
        transition: background-color var(--transition-speed);
    }
    
    .mobile-nav-toggle:hover {
        background-color: var(--bg-main);
    }
    
    .mobile-nav-toggle .bar {
        width: 22px;
        height: 2px;
        background-color: var(--color-dark-slate);
        border-radius: 2px;
        transition: all 0.3s ease;
    }
    
    .mobile-nav-toggle.open .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    
    .mobile-nav-toggle.open .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-nav-toggle.open .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .site-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: var(--sidebar-width);
        height: 100vh;
        position: fixed;
        top: 0;
        left: calc(var(--sidebar-width) * -1);
        bottom: 0;
        z-index: 101;
        transition: left 0.3s ease;
        padding: 2rem 1.5rem;
        box-shadow: 4px 0 20px rgba(0,0,0,0.15);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .content-area {
        width: 100%;
        max-width: 100%;
        padding: 2rem 1.25rem;
        margin-top: 60px;
    }
    
    .card {
        padding: 1.75rem;
    }
}