/* CSS Variables for consistent theming */
:root {
    --color-bg: #0a0a0a;
    --color-bg-secondary: #121212;
    --color-text: #e8e8e8;
    --color-text-secondary: #a0a0a0;
    --color-accent: #5c0000;
    --color-accent-hover: #7a0000;
    --color-border: #2a2a2a;
    --font-serif: 'Crimson Text', serif;
    --font-sans: 'Inter', sans-serif;
    --transition-speed: 400ms;
    --max-content-width: 700px;
}

/* Base styles and reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    opacity: 0;
    animation: fadeIn var(--transition-speed) forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 2.5rem;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

h2 {
    font-size: 1.8rem;
    color: var(--color-text-secondary);
    position: relative;
    padding-bottom: 0.5rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 1px;
    background-color: var(--color-accent);
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

a:hover {
    color: var(--color-accent);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Vertical Line */
.vertical-line {
    position: fixed;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: rgba(92, 0, 0, 0.3);
    z-index: -1;
}

/* Login Page Styles */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: var(--color-bg);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 3rem;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-secondary);
    text-align: center;
}

.login-title {
    margin-bottom: 2rem;
    text-align: center;
}

.login-title h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    font-family: var(--font-sans);
    color: var(--color-accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.login-form {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color var(--transition-speed) ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
}

.login-btn {
    width: 100%;
    padding: 1rem;
    background-color: transparent;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    font-family: var(--font-sans);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.login-btn:hover {
    background-color: rgba(92, 0, 0, 0.1);
    border-color: var(--color-accent-hover);
    color: var(--color-accent-hover);
}

.login-warning {
    margin-top: 2rem;
    padding: 1rem;
    border: 1px solid var(--color-border);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Library Page Header */
.library-header {
    padding: 2rem 0;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background-color: rgba(10, 10, 10, 0.95);
    z-index: 100;
    backdrop-filter: blur(5px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--color-text-secondary);
}

.site-title span {
    color: var(--color-accent);
}

.logout-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    cursor: pointer;
    transition: color var(--transition-speed) ease;
}

.logout-btn:hover {
    color: var(--color-accent);
}

/* Library Content */
.library-content {
    padding: 3rem 0;
}

.journal-cover-container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto 3rem;
    border: 1px solid var(--color-border);
    padding: 2rem;
    background-color: var(--color-bg-secondary);
}

.journal-cover {
    width: 100%;
    height: auto;
    display: block;
    filter: grayscale(20%) brightness(90%);
}

.library-description {
    max-width: var(--max-content-width);
    margin: 0 auto 4rem;
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    text-align: center;
}

/* Chapter Navigation Grid */
.chapter-nav {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.chapter-link {
    display: block;
    background-color: transparent;
    border: 1px solid var(--color-border);
    padding: 2rem 1.5rem;
    text-align: left;
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

.chapter-link:hover {
    border-color: var(--color-accent);
    background-color: rgba(92, 0, 0, 0.05);
    transform: translateY(-2px);
}

.chapter-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 0;
    background-color: var(--color-accent);
    transition: height var(--transition-speed) ease;
}

.chapter-link:hover::before {
    height: 100%;
}

.chapter-link h3 {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.chapter-link .date {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Chapter Page Styles */
.chapter-content {
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: 2rem 0 5rem;
}

.breadcrumb {
    margin-bottom: 2rem;
}

.back-link {
    display: inline-block;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-speed) ease;
}

.back-link:hover {
    color: var(--color-accent);
}

.chapter-info {
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.chapter-date {
    font-size: 0.95rem;
    color: var(--color-accent);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.chapter-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

.entry-content {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    line-height: 1.7;
}

.entry {
    margin-bottom: 3rem;
}

.entry:last-child {
    margin-bottom: 0;
}

.entry p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.entry p:last-child {
    margin-bottom: 0;
}

.chapter-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-speed) ease;
}

.nav-link:hover {
    color: var(--color-accent);
}

/* Footer */
footer {
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .vertical-line {
        left: 30px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .journal-cover-container {
        padding: 1rem;
    }
    
    .chapter-nav {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    
    .vertical-line {
        display: none;
    }
    
    .chapter-navigation {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .login-container {
        padding: 2rem 1.5rem;
    }
    
    .journal-cover-container {
        padding: 0.5rem;
    }
}