:root {
    --color-bg: #f5f3f0;
    --color-surface: #fff9f7;
    --color-text: #141414;
    --color-text-secondary: #383838;
    --color-accent: #24386b;
    --color-accent-hover: #1a2d57;
    --color-border: #e8dfd6;
    --color-success: #2d5a6f;
}

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

html {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 50px;
    padding: 40px 0;
    border-bottom: 2px solid var(--color-border);
}

h1 {
    font-size: 2.5em;
    color: var(--color-accent);
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.2em;
    color: var(--color-text-secondary);
    font-style: italic;
}

h2 {
    font-size: 1.8em;
    color: var(--color-accent);
    margin: 40px 0 20px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
}

h3 {
    font-size: 1.3em;
    color: var(--color-text);
    margin: 20px 0 15px 0;
}

p {
    margin-bottom: 16px;
    text-align: justify;
}

.essay-section {
    background-color: var(--color-surface);
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 4px solid var(--color-accent);
}

.objection-item {
    background-color: var(--color-surface);
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.objection-header {
    display: flex;
    align-items: center;
    padding: 20px;
    cursor: pointer;
    background-color: var(--color-surface);
    transition: background-color 0.2s ease;
    user-select: none;
}

.objection-header:hover {
    background-color: #fef5f1;
}

.objection-header.open {
    background-color: #fef5f1;
}

.toggle-icon {
    width: 24px;
    height: 24px;
    margin-right: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-weight: bold;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.objection-header.open .toggle-icon {
    transform: rotate(180deg);
}

.objection-title {
    font-size: 1.15em;
    font-weight: 600;
    color: var(--color-text);
    flex-grow: 1;
}

.objection-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.objection-content.open {
    max-height: 2000px;
    transition: max-height 0.4s ease;
}

.objection-body {
    padding: 0 20px 20px 59px;
    color: var(--color-text-secondary);
}

.objection-body p {
    margin-bottom: 12px;
}

.reading-section {
    background-color: var(--color-surface);
    padding: 30px;
    border-radius: 8px;
    border-left: 4px solid var(--color-success);
    margin-top: 30px;
}

.reading-section h2 {
    color: var(--color-success);
    border-color: var(--color-success);
}

.reading-category {
    margin-bottom: 25px;
}

.reading-category h3 {
    color: var(--color-success);
    font-size: 1.1em;
    margin-bottom: 12px;
}

.reading-list {
    list-style: none;
    padding-left: 0;
}

.reading-list li {
    padding: 8px 0 8px 30px;
    position: relative;
    color: var(--color-text-secondary);
}

.reading-list li:before {
    content: "✦";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

.toc {
    background-color: var(--color-surface);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    border: 1px solid var(--color-border);
}

.toc h3 {
    margin-top: 0;
    color: var(--color-accent);
}

.toc ul {
    list-style: none;
    padding-left: 0;
}

.toc li {
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
}

.toc li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.toc a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

footer {
    text-align: center;
    padding: 40px 0 20px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.9em;
    margin-top: 50px;
}

.objection-label {
    display: inline-block;
    background-color: #f0ebe5;
    color: var(--color-text);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.85em;
    margin-right: 10px;
    font-weight: 500;
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.8em;
    }

    h2 {
        font-size: 1.4em;
    }

    .essay-section {
        padding: 20px;
    }

    .objection-header {
        padding: 15px;
    }

    .objection-body {
        padding: 0 15px 15px 50px;
    }

    .container {
        padding: 20px 15px;
    }
}

/* Navbar Styles */
.navbar {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    padding: 0 20px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.navbar nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 30px;
}

.navbar nav a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 0.95em;
    font-weight: 500;
    transition: color 0.2s ease;
}

.navbar nav a:hover,
.navbar nav a.active {
    color: var(--color-accent);
}