/* Main layout */
:root {
    --sidebar-width: 250px;
    --accent-green: #228b22;
    --accent-red: #d32f2f;
    --accent-black: #1a1a1a;
    --accent-white: #ffffff;
    --border-color: #e0e0e0;
    --text-color: #333333;
    --bg-light: #f9f9f9;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
    color: var(--text-color);
    background-color: var(--accent-white);
    line-height: 1.6;
}

/* Container and main layout */
.container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-light);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 20px;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    z-index: 100;
    transform: translateX(0);
    transition: transform 0.3s ease;
}

.sidebar.hidden {
    transform: translateX(-100%);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.sidebar-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

/* Outline navigation */
.outline-nav {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.outline-item {
    padding: 8px 12px;
    font-size: 14px;
    color: var(--text-color);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
    text-decoration: none;
    display: block;
}

.outline-item:hover {
    color: var(--accent-green);
    padding-left: 16px;
}

.outline-item.active {
    color: var(--accent-green);
    font-weight: 600;
    border-left: 3px solid var(--accent-green);
    padding-left: 12px;
}

.outline-item.level-4 {
    padding-left: 24px;
    font-size: 13px;
}

.outline-item.level-5 {
    padding-left: 36px;
    font-size: 12px;
}

/* Main content area */
.main-content {
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    width: calc(100% - var(--sidebar-width));
    height: 100vh;
}

/* Tab bar */
.tab-bar {
    background-color: var(--accent-white);
    border-bottom: 1px solid var(--border-color);
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    position: sticky;
    top: 0;
    z-index: 50;
    min-height: 60px;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
    padding: 10px;
}

.tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tab-button {
    background: none;
    border: none;
    padding: 15px 20px;
    font-size: 15px;
    cursor: pointer;
    color: var(--text-color);
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
    font-weight: 500;
}

.tab-short {
    display: none;
}

.tab-button:hover {
    color: var(--accent-green);
}

.tab-button.active {
    color: var(--accent-green);
    border-bottom-color: var(--accent-green);
}

/* Content area */
.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 30px 40px;
}

.tab-content {
    display: none;
}

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

/* Heading styles */
.content-area h1 {
    font-size: 32px;
    font-weight: 700;
    margin: 30px 0 20px 0;
    color: var(--accent-black);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-green);
}

.content-area h2 {
    font-size: 28px;
    font-weight: 600;
    margin: 25px 0 15px 0;
    color: var(--accent-black);
}

.content-area h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 20px 0 12px 0;
    color: #555;
}

.content-area h4 {
    font-size: 18px;
    font-weight: 600;
    margin: 15px 0 10px 0;
    color: #666;
}

.content-area h5 {
    font-size: 16px;
    font-weight: 600;
    margin: 12px 0 8px 0;
    color: #777;
}

/* Lists */
.content-area ul,
.content-area ol {
    margin: 15px 0 15px 30px;
}

.content-area li {
    margin: 8px 0;
    line-height: 1.7;
}

.content-area ul li {
    list-style-type: disc;
}

.content-area ol li {
    list-style-type: decimal;
}

.content-area ul ul,
.content-area ol ol,
.content-area ul ol,
.content-area ol ul {
    margin: 8px 0 8px 30px;
}

/* Links */
.content-area a {
    color: var(--accent-green);
    text-decoration: none;
    transition: all 0.2s ease;
}

.content-area a:hover {
    color: var(--accent-red);
    text-decoration: underline;
}

.content-area a:visited {
    color: #8b4789;
}

/* Paragraphs */
.content-area p {
    margin: 12px 0;
}

.highlight {
    background-color: #ffff99;
    padding: 10px;
    border-radius: 5px;
    font-weight: bold;
}

/* Images */
.content-area img {
    max-width: 100%;
    height: auto;
    margin: 20px 0;
}

/* Banner */
.banner-wrap {
    margin: -30px -40px 20px -40px;
    overflow: hidden;
    max-height: 200px;
}

.banner-wrap img {
    width: 100%;
    min-width: 900px;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: center;
}

@media (max-width: 768px) {
    .banner-wrap {
        margin: -20px -20px 15px -20px;
    }
}

@media (max-width: 480px) {
    .banner-wrap {
        margin: -15px -15px 15px -15px;
    }
}

/* Code blocks */
.content-area code {
    background-color: var(--bg-light);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: "Courier New", monospace;
    font-size: 0.9em;
}

.content-area pre {
    background-color: var(--bg-light);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin: 15px 0;
}

/* Blockquotes */
.content-area blockquote {
    border-left: 4px solid var(--accent-green);
    padding-left: 15px;
    margin: 15px 0;
    color: #666;
    font-style: italic;
}

/* Tables */
.content-area table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.content-area table th,
.content-area table td {
    border: 1px solid var(--border-color);
    padding: 12px;
    text-align: left;
}

.content-area table th {
    background-color: var(--bg-light);
    font-weight: 600;
}

/* Social grid */

.social-grid {
    column-count: 3;
    column-gap: 20px;
    list-style: none;
    margin: 15px 0;
    padding: 0;
}

.social-grid li {
    break-inside: avoid;
    padding: 4px 0;
    margin: 0;
    list-style: none;
}

.social-grid li h5 {
    margin: 0;
    display: inline;
}

@media (max-width: 768px) {
    .social-grid {
        column-count: 2;
    }
}

@media (max-width: 480px) {
    .social-grid {
        column-count: 1;
    }
}


/* Bottom sheet overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 199;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.visible {
    display: block;
    opacity: 1;
}

/* Bottom sheet drag handle */
.sidebar-handle {
    display: none;
    width: 40px;
    height: 4px;
    background: #ccc;
    border-radius: 2px;
    margin: 0 auto 12px;
    flex-shrink: 0;
}

body.dark-mode .sidebar-handle {
    background: #555;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: fixed;
        left: 0;
        bottom: 0;
        top: auto;
        z-index: 200;
        border-right: none;
        border-top: 1px solid var(--border-color);
        border-bottom: none;
        border-radius: 16px 16px 0 0;
        max-height: 65vh;
        transform: translateY(100%);
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
        padding-top: 8px;
    }

    .sidebar.visible {
        transform: translateY(0);
    }

    .sidebar.hidden {
        transform: translateY(100%);
    }

    .sidebar-handle {
        display: block;
    }

    .sidebar-close {
        display: block;
    }

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

    .tab-bar {
        display: flex;
        align-items: center;
        gap: 0;
        padding: 0;
        min-height: 60px;
    }

    .hamburger {
        display: block;
        flex-shrink: 0;
    }

    .tabs {
        flex: 1;
        gap: 0;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 0 10px;
    }

    .tab-button {
        padding: 15px 12px;
        font-size: 13px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .tab-full {
        display: none;
    }

    .tab-short {
        display: inline;
    }

    .dark-toggle {
        font-size: 16px;
    }

    .content-area {
        padding: 20px;
    }

    .content-area h1 {
        font-size: 24px;
    }

    .content-area h2 {
        font-size: 20px;
    }

    .content-area h3 {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .content-area {
        padding: 15px;
    }

    .content-area h1 {
        font-size: 20px;
    }

    .tab-button {
        padding: 12px 12px;
        font-size: 12px;
    }
}

/* Dark mode */
body.dark-mode {
    --accent-white: #1a1a1a;
    --accent-black: #e8e8e8;
    --text-color: #d4d4d4;
    --bg-light: #242424;
    --border-color: #3a3a3a;
}

body.dark-mode .content-area a {
    color: #5cb85c;
}

body.dark-mode .content-area a:visited {
    color: #b07ab0;
}

body.dark-mode .content-area a:hover {
    color: #e85d5d;
}

body.dark-mode .content-area h3 {
    color: #bbb;
}

body.dark-mode .content-area h4 {
    color: #aaa;
}

body.dark-mode .content-area h5 {
    color: #999;
}

body.dark-mode .highlight {
    background-color: #4a4a20;
}

body.dark-mode .tab-button.active {
    color: #5cb85c;
    border-bottom-color: #5cb85c;
}

body.dark-mode .outline-item.active {
    color: #5cb85c;
    border-left-color: #5cb85c;
}

/* Dark mode toggle */
.dark-toggle {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    font-size: 20px;
    color: var(--text-color);
    margin-left: auto;
    align-self: center;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dark-toggle:hover {
    color: var(--accent-green);
}