@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Crimson+Pro:ital,wght@0,400;0,600;1,400&display=swap');

/* ========================================
   RESET & BASE STYLES
   ======================================== */

* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

:root {
    --color-bg: #fafaf9;
    --color-text: #1c1917;
    --color-text-muted: #78716c;
    --color-border: #e7e5e4;
    --color-accent: #0c0a09;
    --color-chat-bg: #f5f5f4;
    --font-reader: 'Crimson Pro', Charter, Georgia, Cambria, 'Times New Roman', serif;
    --font-mono: 'Space Mono', monospace;
    --max-width: 42rem;
    --spacing-page: clamp(1.5rem, 5vw, 4rem);
}

body {
    font-family: var(--font-reader);
    background-color: var(--color-bg);
    color: var(--color-text);
    position: relative;
}

/* ========================================
   TEXTURE & ATMOSPHERE
   ======================================== */

.noise::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.02;
    z-index: -1;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    pointer-events: none;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

.reader-content {
    font-size: clamp(1.0625rem, 1vw + 0.875rem, 1.1875rem);
    line-height: 1.75;
    color: var(--color-text);
    letter-spacing: 0.01em;
}

.reader-content h1 {
    font-family: var(--font-mono);
    font-size: clamp(1.75rem, 3vw + 1rem, 2.5rem);
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.03em;
    line-height: 1.2;
    color: var(--color-accent);
}

.reader-content h2 {
    font-family: var(--font-reader);
    font-size: clamp(1.125rem, 2vw + 0.5rem, 1.5rem);
    font-weight: 400;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.reader-content h3 {
    font-family: var(--font-mono);
    font-size: clamp(0.875rem, 1.5vw + 0.5rem, 1.125rem);
    font-weight: 400;
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    font-style: italic;
    text-transform: uppercase;
}

.reader-content p {
    margin-bottom: 1.5rem;
    text-indent: 0;
    white-space: pre; /* CSS2 */
    white-space: -moz-pre-wrap; /* Mozilla */
    white-space: -hp-pre-wrap; /* HP printers */
    white-space: -o-pre-wrap; /* Opera 7 */
    white-space: -pre-wrap; /* Opera 4-6 */
    white-space: pre-wrap; /* CSS 2.1 */
    white-space: pre-line; /* CSS 3 (and 2.1 as well, actually) */
    word-wrap: break-word; /* IE */
}

.reader-content em {
    font-style: italic;
    color: var(--color-text-muted);
}

.reader-content strong {
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* Metadata Styling */
.chapter-meta {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin: 2rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    line-height: 2;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.chapter-meta hr {
    width: 2rem;
    height: 1px;
    background: var(--color-border);
    border: none;
    margin: 0.5rem auto;
}

/* Chapter Menu Styling */
.chapter-menu {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    margin: 3rem 0;
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.chapter-menu p {
    margin-bottom: 0.5rem;
}

.chapter-menu strong {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.chapter-menu ol {
    list-style: none;
    padding: 0;
    margin: 0;
}

.chapter-menu li {
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.chapter-menu a {
    color: var(--color-text);
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-block;
    letter-spacing: 0.05em;
}

.chapter-menu a:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

/* Chat Log Styling */
.chat-log {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    background: var(--color-chat-bg);
    padding: 1.5rem;
    margin: 2rem -1.5rem;
    border-radius: 0.5rem;
    border-left: 2px solid var(--color-border);
}

.chat-log p {
    margin-bottom: 0.75rem;
    display: flex;
    flex-direction: column;
}

.chat-log strong {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    margin-bottom: 0.25rem;
    letter-spacing: 0.05em;
}

.chat-log em {
    font-style: normal;
    color: var(--color-text);
}


.reader-content hr {
    border: none;
    text-align: center;
    margin: 1rem 0;
}

.reader-content hr::before {
    content: '***';
    letter-spacing: 1em;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    opacity: 0.5;
}

/* ========================================
   ANIMATIONS
   ======================================== */

.page-fade {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

.header-blur {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.nav-blur {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border);
}

/* ========================================
   BUTTONS & CONTROLS
   ======================================== */

.btn-nav {
    padding: 0.625rem 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 0.25rem;
    color: var(--color-text);
}

.btn-nav:hover:not(:disabled) {
    background: #f5f5f4;
}

.btn-nav:active:not(:disabled) {
    transform: scale(0.98);
}

.btn-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.page-indicator {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 9999px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    background: #d6d3d1;
}

.page-indicator:hover {
    transform: scale(1.3);
}

.page-indicator.active {
    background: var(--color-accent);
    width: 1.5rem;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 640px) {
    :root {
        --spacing-page: 1.5rem;
    }
    
    .reader-content {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .chat-log {
        margin: 1.5rem -1rem;
        padding: 1rem;
    }

    .chapter-meta {
        font-size: 0.75rem;
        margin: 1.5rem 0;
    }

    .btn-nav {
         padding: 0.5rem 1rem;
         font-size: 0.75rem;
    }
    
    .header-text {
        font-size: 0.65rem;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    .page-fade,
    .btn-nav,
    .page-indicator {
        animation: none;
        transition: none;
    }
}

/* Focus states for keyboard navigation */
button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .header-blur,
    .nav-blur {
        display: none;
    }
    
    .reader-content {
        font-size: 12pt;
        line-height: 1.6;
    }
}