/* Tenebrism Website Styling — black & white, chiaroscuro */

:root {
    --black: #0a0a0a;
    --charcoal: #1a1a1a;
    --ink: #111;
    --gray-dark: #333;
    --gray-mid: #666;
    --gray-light: #999;
    --silver: #c0c0c0;
    --paper: #f8f8f5;
    --white: #fff;
    --primary-color: var(--black);
    --secondary-color: var(--gray-dark);
    --background-color: var(--ink);
    --text-color: var(--black);
    --border-color: #ddd;
}

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

body {
    font-family: Georgia, 'Times New Roman', serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--background-color);
}

/* Header & Navigation */
header {
    background-color: var(--black);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--gray-dark);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 0.05em;
    color: var(--white);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--silver);
    text-decoration: none;
    transition: color 0.2s;
    letter-spacing: 0.02em;
}

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

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    margin-bottom: 4rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--black);
    letter-spacing: 0.02em;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--black);
    text-align: center;
    letter-spacing: 0.02em;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    letter-spacing: 0.01em;
}

/* Hero Section — figure emerging from dark */
.hero {
    text-align: center;
    padding: 5rem 2rem;
    background: var(--black);
    color: var(--white);
    margin-bottom: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--gray-dark);
}

.hero h1 {
    color: var(--white);
    font-size: 3.25rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.tagline {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    color: var(--silver);
    max-width: 36em;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* CTA Buttons — light on dark */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: 2px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--white);
    color: var(--black);
    border: 1px solid var(--white);
}

.btn-primary:hover {
    background-color: var(--paper);
    color: var(--black);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 1px solid var(--gray-mid);
}

.btn-secondary:hover {
    border-color: var(--silver);
    color: var(--silver);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Mantra (home page) */
.mantra {
    background: var(--paper);
    color: var(--black);
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border: 1px solid var(--gray-light);
    border-left: 4px solid var(--black);
}

.mantra h2 {
    color: var(--black);
    text-align: center;
    margin-bottom: 1.5rem;
}

.mantra p {
    margin-bottom: 1rem;
    font-size: 1.05rem;
    color: var(--gray-dark);
}

.mantra p:last-child {
    margin-bottom: 0;
    font-style: italic;
}

/* Core tenets (home page) — lit panels on dark */
.core-tenets-intro {
    background: var(--paper);
    color: var(--black);
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border: 1px solid var(--gray-light);
    font-size: 1.05rem;
}

.core-tenets-intro p {
    margin-bottom: 1rem;
}

.core-tenets-intro p:last-child {
    margin-bottom: 0;
}

.core-tenets h2 {
    margin-bottom: 2rem;
    color: var(--white);
    text-align: center;
}

.tenet {
    background: var(--paper);
    color: var(--black);
    padding: 2.25rem;
    margin-bottom: 2rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border-left: 4px solid var(--black);
}

.tenet h3 {
    color: var(--black);
    margin-bottom: 1rem;
    font-size: 1.15rem;
}

.tenet p {
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

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

.engage-cta {
    padding: 3rem 2rem;
    background: var(--paper);
    color: var(--black);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border: 1px solid var(--gray-light);
    margin-bottom: 3rem;
}

.engage-cta h2 {
    margin-bottom: 1rem;
    color: var(--black);
}

.engage-cta p {
    max-width: 720px;
    margin-bottom: 1.25rem;
    color: var(--gray-dark);
}

.engage-cta ol {
    max-width: 720px;
    margin: 0;
    padding-left: 1.5rem;
    color: var(--gray-dark);
}

.engage-cta li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.engage-cta a {
    color: var(--black);
    text-decoration: underline;
}

.engage-cta a:hover {
    color: var(--gray-mid);
}

.full-dialogue-cta {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--paper);
    color: var(--black);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border: 1px solid var(--gray-light);
}

.full-dialogue-cta h2 {
    margin-bottom: 1rem;
    color: var(--black);
}

.full-dialogue-cta p {
    max-width: 600px;
    margin: 0 auto 1.5rem;
    color: var(--gray-dark);
}

.practice-cta {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--paper);
    color: var(--black);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border: 1px solid var(--gray-light);
    margin-bottom: 3rem;
}

.practice-cta h2 {
    margin-bottom: 1rem;
    color: var(--black);
}

.practice-cta p {
    max-width: 600px;
    margin: 0 auto 1.5rem;
    color: var(--gray-dark);
}

.practice-cta a {
    color: var(--black);
    text-decoration: underline;
}

.practice-cta a:hover {
    color: var(--gray-mid);
}

.practice-cta .cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin: 0 auto;
    width: 100%;
    max-width: 600px;
    text-align: center;
}

.becoming-tenebrist {
    padding: 3rem 2rem;
    background: var(--paper);
    color: var(--black);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border: 1px solid var(--gray-light);
    margin-bottom: 3rem;
}

.becoming-tenebrist h2 {
    margin-bottom: 1rem;
    color: var(--black);
}

.becoming-tenebrist > p {
    max-width: 720px;
    margin-bottom: 2rem;
    color: var(--gray-dark);
}

.markdown-guide {
    max-width: 720px;
}

.markdown-guide h3 {
    color: var(--black);
    font-size: 1rem;
    margin-top: 1.5rem;
    margin-bottom: 0.35rem;
    font-family: var(--mono);
}

.markdown-guide h3:first-child {
    margin-top: 0;
}

.markdown-guide p {
    margin-bottom: 0;
    color: var(--gray-dark);
    font-size: 0.95rem;
}

/* Join page disclaimer */
.disclaimer.notice {
    background: var(--charcoal);
    color: var(--silver);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--gray-mid);
    font-size: 0.95rem;
}

.disclaimer.notice strong {
    color: var(--white);
}

/* Grid Layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background: var(--paper);
    color: var(--black);
    padding: 2rem;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--gray-light);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
}

.card h3 {
    color: var(--black);
    margin-bottom: 1rem;
}

/* Statistics */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    background: var(--paper);
    color: var(--black);
    padding: 2rem;
    text-align: center;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--gray-light);
}

.number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--black);
    margin-bottom: 0.5rem;
}

.label {
    display: block;
    color: var(--gray-mid);
    font-size: 0.95rem;
}

/* Testimonials */
.testimonial {
    background: var(--paper);
    color: var(--black);
    padding: 2rem;
    border-left: 4px solid var(--black);
    margin-bottom: 1.5rem;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.testimonial p {
    margin-bottom: 1rem;
}

.author {
    color: var(--gray-mid);
    font-style: italic;
    font-size: 0.95rem;
}

/* Forms */
.form-container {
    background: var(--paper);
    color: var(--black);
    padding: 3rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    max-width: 600px;
    margin: 0 auto;
    border: 1px solid var(--gray-light);
}

.form-container h1 {
    color: var(--black);
}

.registration-form {
    margin-top: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--black);
}

.form-group input[type="text"],
.form-group textarea,
.form-group input[type="email"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-mid);
    background: var(--white);
    color: var(--black);
    font-size: 1rem;
    font-family: inherit;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--black);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
}

.form-group.checkbox {
    display: flex;
    align-items: center;
}

.form-group.checkbox input[type="checkbox"] {
    margin-right: 0.5rem;
    cursor: pointer;
}

.form-group.checkbox label {
    margin-bottom: 0;
    display: inline;
    cursor: pointer;
}

/* Success Message */
.success-message {
    background: var(--black);
    color: var(--white);
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--gray-dark);
}

.success-message h2 {
    color: var(--white);
}

.success-message p {
    margin-bottom: 1rem;
}

/* Screen reader content */
.sr-only {
    color: var(--black);
    background: var(--black);
}

.sr-only a {
    color: var(--black);
}

.sr-only h2 {
    color: var(--black);
}

.sr-only ol {
    list-style-type: decimal;
    padding-left: 1.5rem;
    color: var(--black);
}

.sr-only ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    color: var(--black);
}

.sr-only li {
    color: var(--black);
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    background-color: var(--black);
    color: var(--silver);
    text-align: center;
    padding: 2.5rem;
    margin-top: 4rem;
    border-top: 1px solid var(--gray-dark);
}

footer a {
    color: var(--white);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
    color: var(--silver);
}

/* Dialogue page — layout with sidebar TOC */
.dialogue-page {
    display: flex;
    gap: 0;
    max-width: none;
    padding: 0;
}

.dialogue-page.no-sidebar {
    flex-direction: column;
    align-items: center;
}

.dialogue-page.no-sidebar .hero {
    width: 100%;
}

.dialogue-page.no-sidebar .dialogue-content {
    width: 100%;
    max-width: 900px;
}

.dialogue-toc {
    width: 240px;
    min-width: 240px;
    background: var(--charcoal);
    color: var(--silver);
    padding: 1.5rem 1rem;
    position: sticky;
    top: 0;
    align-self: start;
    max-height: 100vh;
    overflow-y: auto;
    border-right: 1px solid var(--gray-dark);
}

.toc-title {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--white);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--gray-dark);
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.toc-list > li {
    display: block;
    margin-bottom: 0.5rem;
}

.toc-list > li > a {
    display: block;
    color: var(--silver);
    text-decoration: none;
    font-size: 0.85rem;
    line-height: 1.5;
    transition: color 0.2s;
}

.toc-list > li > a:hover {
    color: var(--white);
}

/* Nested list for chapters under books */
.toc-list > li > ul {
    list-style: none;
    margin: 0.25rem 0 0.5rem 0;
    padding: 0 0 0 1rem;
    display: flex;
    flex-direction: column;
}

.toc-list > li > ul > li {
    display: block;
    margin: 0;
    padding: 0 0 0 0.5rem;
    position: relative;
    line-height: 1.2;
}

.toc-list > li > ul > li::before {
    content: "–";
    position: absolute;
    left: -0.5rem;
    color: var(--gray-mid);
}

.toc-list > li > ul > li > a {
    display: block;
    font-size: 0.8rem;
    color: var(--gray-mid);
    text-decoration: none;
    line-height: 1.25;
    padding: 0.05rem 0;
    transition: color 0.2s;
}

.toc-list > li > ul > li > a:hover {
    color: var(--silver);
}

.dialogue-content {
    flex: 1;
    min-width: 0;
    max-width: 900px;
    padding: 2rem;
}

/* Dialogue page — same chiaroscuro */
.dialogue-page .hero {
    background: var(--black);
    color: var(--white);
    border: 1px solid var(--gray-dark);
}

.dialogue-page .hero h1 {
    color: var(--white);
}

.dialogue-page .book {
    margin-bottom: 4rem;
}

.dialogue-page .book h2 {
    color: var(--white);
    text-align: left;
}

.dialogue-page .chapter {
    margin-bottom: 3rem;
}

.dialogue-page .chapter h3 {
    font-size: 1.1rem;
    color: var(--silver);
    border-bottom: 1px solid var(--gray-dark);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.dialogue-line {
    margin-bottom: 1rem;
    padding-left: 1rem;
    border-left: 3px solid transparent;
}

.dialogue-line .speaker {
    font-weight: 600;
    display: inline;
}

.dialogue-line .speaker.user {
    color: var(--white);
}

.dialogue-line .speaker.agent {
    color: var(--silver);
}

.dialogue-line.user {
    border-left-color: var(--white);
    color: var(--silver);
}

.dialogue-line.agent {
    border-left-color: var(--gray-mid);
    color: var(--silver);
}

.dialogue-turn {
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid transparent;
}

.dialogue-turn.user {
    border-left-color: var(--white);
    color: var(--silver);
}

.dialogue-turn.agent {
    border-left-color: var(--gray-mid);
    color: var(--silver);
}

.dialogue-turn .speaker {
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.dialogue-turn .speaker.user {
    color: var(--white);
}

.dialogue-turn .speaker.agent {
    color: var(--silver);
}

.dialogue-turn p {
    margin-bottom: 0.75rem;
}

.dialogue-content pre {
    background: var(--charcoal);
    border: 1px solid var(--gray-dark);
    border-radius: 4px;
    padding: 1rem 1.25rem;
    margin: 0.75rem 0;
    overflow-x: auto;
}

.dialogue-content pre code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--silver);
    white-space: pre;
}

/* Conversation/thread page — message-based naming (the-path.html) */
.conversation-page {
    display: flex;
    gap: 0;
    max-width: none;
    padding: 0;
}

.conversation-page.no-sidebar {
    flex-direction: column;
    align-items: center;
}

.conversation-page.no-sidebar .thread {
    width: 100%;
    max-width: 900px;
}

.conversation-page h2 {
    color: var(--white);
}

.thread {
    flex: 1;
    min-width: 0;
    max-width: 900px;
    padding: 2rem;
}

.thread-title {
    color: var(--white);
}

.thread-context {
    font-size: 1.25rem;
    color: var(--silver);
    margin-bottom: 2rem;
}

.message {
    margin-bottom: 1rem;
    padding-left: 1rem;
    border-left: 3px solid transparent;
}

.message .author {
    font-weight: 600;
    display: inline;
}

.message .author.user {
    color: var(--white);
}

.message .author.agent {
    color: var(--silver);
}

.message.user {
    border-left-color: var(--white);
    color: var(--silver);
}

.message.agent {
    border-left-color: var(--gray-mid);
    color: var(--silver);
}

.message-group {
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid transparent;
}

.message-group.user {
    border-left-color: var(--white);
    color: var(--silver);
}

.message-group.agent {
    border-left-color: var(--gray-mid);
    color: var(--silver);
}

.message-group .author {
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.message-group .author.user {
    color: var(--white);
}

.message-group .author.agent {
    color: var(--silver);
}

.message-group p {
    margin-bottom: 0.75rem;
}

.thread pre {
    background: var(--charcoal);
    border: 1px solid var(--gray-dark);
    border-radius: 4px;
    padding: 1rem 1.25rem;
    margin: 0.75rem 0;
    overflow-x: auto;
}

.thread pre code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--silver);
    white-space: pre;
}

.dialogue-page .credo {
    background: var(--paper);
    color: var(--black);
    padding: 2rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    border-left: 4px solid var(--black);
    margin: 1.5rem 0;
    font-style: italic;
}

.dialogue-page .credo p {
    margin-bottom: 0.75rem;
    color: var(--gray-dark);
}

.dialogue-page .tenebrist-signoff {
    font-style: italic;
    color: var(--gray-mid);
    margin-top: 0.5rem;
}

.dialogue-page .tenebrist-signoff-epilogue {
    font-style: italic;
    color: var(--gray-mid);
    margin: 0.25rem 0 0.5rem 1rem;
    font-size: 0.95rem;
}

.dialogue-page .proem,
.dialogue-page .dialogue-closing {
    background: var(--paper);
    color: var(--black);
    padding: 2rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    margin-bottom: 2rem;
    font-size: 1.05rem;
    border: 1px solid var(--gray-light);
}

.dialogue-page .proem h2,
.dialogue-page .dialogue-closing h2 {
    color: var(--black);
}

.dialogue-page .proem p,
.dialogue-page .dialogue-closing p {
    color: var(--gray-dark);
}

.dialogue-page .dialogue-closing a {
    color: var(--black);
    text-decoration: underline;
}

.dialogue-page .dialogue-closing a:hover {
    color: var(--gray-mid);
}

.dialogue-page .dialogue-closing {
    border-left: 4px solid var(--black);
}

.dialogue-subtitle {
    font-size: 1.25rem;
    color: var(--silver);
    margin-top: -0.5rem;
    margin-bottom: 2rem;
}

.dialogue-page h2 {
    color: var(--white);
}

.dialogue-title {
    color: var(--white);
}

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

    .dialogue-toc {
        width: 100%;
        min-width: 0;
        position: static;
        max-height: none;
        border-right: none;
        border-bottom: 1px solid var(--gray-dark);
    }

    .dialogue-content {
        padding: 1rem;
    }

    .conversation-page {
        flex-direction: column;
    }

    .thread {
        padding: 1rem;
    }

    nav {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}