/* ============================================================
   style.css — donaldwillingham.com
   Warm memoir-style design, light + dark mode, fully responsive
   ============================================================ */

/* ── CSS Custom Properties ─────────────────────────────────── */
:root {
    /* Light mode palette */
    --color-bg:          #faf8f4;
    --color-surface:     #ffffff;
    --color-surface-alt: #f3efe8;
    --color-border:      #e0d8cc;
    --color-text:        #2c2416;
    --color-text-muted:  #6b5e4e;
    --color-accent:      #7a5c2e;
    --color-accent-light:#c9a05a;
    --color-accent-hover:#5c4220;
    --color-link:        #7a5c2e;

    /* Typography */
    --font-serif:   'Lora', Georgia, 'Times New Roman', serif;
    --font-sans:    'Source Sans 3', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2.5rem;
    --space-2xl: 4rem;

    /* Sizing */
    --max-width-content: 700px;
    --max-width-wide:    1100px;
    --header-height:     64px;

    /* Transitions */
    --transition: 0.2s ease;
}

[data-theme="dark"] {
    --color-bg:          #1c1a16;
    --color-surface:     #252218;
    --color-surface-alt: #2e2a22;
    --color-border:      #3d3728;
    --color-text:        #e8e0d0;
    --color-text-muted:  #a09080;
    --color-accent:      #c9a05a;
    --color-accent-light:#e8c880;
    --color-accent-hover:#e8c880;
    --color-link:        #c9a05a;
}

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    font-size: 18px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    transition: background-color var(--transition), color var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img { max-width: 100%; display: block; }
a { color: var(--color-link); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--color-accent-hover); }

/* ── Site Header ───────────────────────────────────────────── */
.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    transition: background-color var(--transition), border-color var(--transition);
}

.site-header__inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.site-header__brand {
    text-decoration: none;
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}
.site-header__title {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
}
.site-header__subtitle {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.site-header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}
.site-header__nav a {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--color-text-muted);
    transition: color var(--transition);
    letter-spacing: 0.02em;
}
.site-header__nav a:hover { color: var(--color-accent); }

/* ── Theme Toggle ──────────────────────────────────────────── */
.theme-toggle {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--color-text-muted);
    transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.theme-toggle:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-surface-alt);
}

/* ── Site Footer ───────────────────────────────────────────── */
.site-footer {
    margin-top: auto;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    transition: background-color var(--transition), border-color var(--transition);
}
.site-footer__inner { max-width: var(--max-width-wide); margin: 0 auto; }
.site-footer p { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.6; }
.site-footer__tagline { font-family: var(--font-serif); font-style: italic; margin-top: var(--space-xs); }

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.7rem 1.6rem;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: background var(--transition), color var(--transition), transform 0.1s;
    letter-spacing: 0.02em;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}
.btn-primary:hover { background: var(--color-accent-hover); color: #fff; text-decoration: none; }

.btn-secondary {
    background: transparent;
    color: var(--color-accent);
    border: 1.5px solid var(--color-accent);
}
.btn-secondary:hover {
    background: var(--color-accent);
    color: #fff;
    text-decoration: none;
}

.btn-ghost {
    background: var(--color-surface-alt);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-ghost:hover { background: var(--color-border); text-decoration: none; }

/* ── Homepage ──────────────────────────────────────────────── */
.hero {
    flex: 1;
    display: flex;
    align-items: center;
    padding: var(--space-2xl) var(--space-lg);
}
.hero__inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--space-2xl);
    align-items: center;
    width: 100%;
}

.hero__cover {
    position: relative;
}
.hero__cover-img {
    width: 100%;
    max-width: 300px;
    border-radius: 4px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.18), 0 4px 16px rgba(0,0,0,0.12);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hero__cover-img:hover {
    transform: translateY(-4px) rotate(-0.5deg);
    box-shadow: 0 28px 70px rgba(0,0,0,0.22), 0 6px 20px rgba(0,0,0,0.14);
}

/* Placeholder if no cover image */
.hero__cover-placeholder {
    width: 100%;
    max-width: 300px;
    aspect-ratio: 2/3;
    background: linear-gradient(145deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.18);
}
.hero__cover-placeholder span {
    color: rgba(255,255,255,0.5);
    font-size: 3rem;
}

.hero__content { }

.hero__label {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.hero__subtitle {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-style: italic;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.hero__author {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: var(--space-xl);
}
.hero__author strong { color: var(--color-text); }

.hero__divider {
    width: 60px;
    height: 2px;
    background: var(--color-accent);
    margin: var(--space-lg) 0;
    border: none;
}

.hero__intro {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    max-width: 520px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
}

.hero__progress-note {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Chapter preview strip */
.chapters-preview {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-xl) var(--space-lg);
    transition: background-color var(--transition);
}
.chapters-preview__inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
}
.chapters-preview h2 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}
.chapters-preview__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
}
.chapter-card {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: var(--space-md);
    text-decoration: none;
    color: var(--color-text);
    transition: border-color var(--transition), background var(--transition);
    display: block;
}
.chapter-card:hover {
    border-color: var(--color-accent);
    background: var(--color-bg);
    text-decoration: none;
    color: var(--color-text);
}
.chapter-card__num {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}
.chapter-card__title {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.4;
}

/* ── Reader Page ───────────────────────────────────────────── */
.reader-layout {
    display: flex;
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-2xl);
    flex: 1;
    width: 100%;
}

/* Sidebar TOC */
.reader-sidebar {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height) + var(--space-lg));
    height: fit-content;
    max-height: calc(100vh - var(--header-height) - 2rem);
    overflow-y: auto;
}
.sidebar-toc h3 {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}
.sidebar-toc__list {
    list-style: none;
}
.sidebar-toc__list li {
    margin-bottom: var(--space-xs);
}
.sidebar-toc__list a {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    color: var(--color-text-muted);
    text-decoration: none;
    display: block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: 3px;
    border-left: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
    line-height: 1.4;
}
.sidebar-toc__list a:hover {
    color: var(--color-accent);
    border-left-color: var(--color-accent-light);
    background: var(--color-surface-alt);
}
.sidebar-toc__list a.active {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
    background: var(--color-surface-alt);
    font-weight: 500;
}

/* Reader controls bar */
.reader-controls {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--transition);
    position: sticky;
    top: var(--header-height);
    z-index: 90;
}
.reader-controls__row {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: nowrap;
    padding: var(--space-sm) var(--space-md);
    overflow: hidden;
}
.reader-controls__toc-row {
    padding: 0 var(--space-md) var(--space-sm);
}
.reader-progress {
    flex: 1;
    min-width: 0;
}
.reader-controls__label {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    font-weight: 500;
    margin-right: var(--space-xs);
}
.font-size-btns { display: flex; gap: var(--space-xs); align-items: center; }
.font-size-btn {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: 3px;
    padding: 3px 10px;
    cursor: pointer;
    color: var(--color-text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    transition: background var(--transition), color var(--transition);
}
.font-size-btn:hover { background: var(--color-border); color: var(--color-text); }

.reader-progress {
    margin-left: auto;
    font-size: 0.78rem;
    color: var(--color-text-muted);
}
.reader-progress-bar {
    width: 100px;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    overflow: hidden;
    display: inline-block;
    vertical-align: middle;
    margin-right: var(--space-sm);
}
.reader-progress-bar__fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: 2px;
    transition: width 0.5s ease;
}

/* Main content area */
.reader-content {
    flex: 1;
    min-width: 0;
}

.chapter-section {
    margin-bottom: var(--space-2xl);
    padding-top: var(--space-md);
}

.chapter-section__header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}
.chapter-section__number {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}
.chapter-section__title {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-text);
}

/* Prose typography */
.prose {
    font-family: var(--font-serif);
    font-size: var(--prose-size, 1.05rem);
    line-height: 1.85;
    color: var(--color-text);
    max-width: var(--max-width-content);
    transition: font-size var(--transition);
}
.prose p {
    margin-bottom: 1.4em;
    text-indent: 1.5em;
}
.prose p:first-child { text-indent: 0; }

/* Chapter navigation */
.chapter-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-xl);
    gap: var(--space-md);
}
.chapter-nav a, .chapter-nav button {
    font-family: var(--font-sans);
    font-size: 0.88rem;
}
.chapter-nav__info {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-align: center;
}

/* Mobile TOC toggle */
.toc-toggle {
    display: none;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--color-text);
    font-family: var(--font-sans);
    font-weight: 500;
}

/* Header TOC — expands inside the sticky reader-controls bar */
.header-toc {
    display: none;
}
.header-toc.open {
    display: block;
    padding: var(--space-sm) var(--space-lg) var(--space-md);
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
    text-align: left;
    max-height: 60vh;
    overflow-y: auto;
}
.header-toc__list {
    list-style: none !important;
    columns: 2;
    column-gap: var(--space-lg);
    margin: 0;
    padding: 0;
}
.header-toc__list li { margin-bottom: var(--space-sm); break-inside: avoid; }
.header-toc__list a {
    font-size: 0.9rem;
    text-decoration: none;
    color: var(--color-text-muted);
}
.header-toc__list a:hover { color: var(--color-accent); }

/* Legacy */
.mobile-toc { display: none; }

/* ── Admin Pages ───────────────────────────────────────────── */
.admin-wrap {
    max-width: 860px;
    margin: var(--space-2xl) auto;
    padding: 0 var(--space-lg);
    flex: 1;
}
.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}
.admin-header h1 {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--color-text);
}
.admin-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    transition: background-color var(--transition);
}
.admin-section h2 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}
.form-group {
    margin-bottom: var(--space-lg);
}
.form-group label {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}
.form-control {
    width: 100%;
    padding: 0.6rem 0.8rem;
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--color-text);
    transition: border-color var(--transition), background var(--transition);
    line-height: 1.5;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface);
}
textarea.form-control {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    line-height: 1.8;
    min-height: 300px;
    resize: vertical;
}
textarea.form-control.chapters-editor { min-height: 500px; }

.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: 4px;
    margin-bottom: var(--space-lg);
    font-size: 0.9rem;
    font-weight: 500;
}
.alert-success { background: #e6f4ea; border: 1px solid #b7dfbe; color: #1e5c2a; }
.alert-error   { background: #fde8e8; border: 1px solid #f5b8b8; color: #7c1f1f; }

[data-theme="dark"] .alert-success { background: #1a3320; border-color: #2a5535; color: #7dcf91; }
[data-theme="dark"] .alert-error   { background: #3a1a1a; border-color: #5a2a2a; color: #f08080; }

/* Login page */
.login-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: var(--space-2xl) var(--space-lg);
}
.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--space-2xl);
    width: 100%;
    max-width: 380px;
    text-align: center;
}
.login-card h1 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: var(--space-xs);
}
.login-card p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}
.login-card .form-group { text-align: left; }
.login-card .btn { width: 100%; justify-content: center; margin-top: var(--space-sm); }

/* ── Utilities ─────────────────────────────────────────────── */
.visually-hidden {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.text-muted  { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
    .hero__inner {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
        gap: var(--space-xl);
    }
    .hero__cover-img { max-width: 220px; }
    .hero__divider { margin: var(--space-lg) auto; }
    .hero__intro { max-width: 100%; }
    .hero__actions { justify-content: center; }

    .reader-sidebar { display: none; }
    .toc-toggle    { display: inline-flex; align-items: center; gap: 6px; }
    .header-toc__list { columns: 1; }
    .reader-layout { padding: var(--space-lg); gap: 0; }
    .reader-controls { padding: 0; }
}

@media (max-width: 600px) {
    html { font-size: 16px; }
    .site-header__inner { padding: 0 var(--space-md); }
    .hero { padding: var(--space-xl) var(--space-md); }
    .chapters-preview { padding: var(--space-xl) var(--space-md); }
    .chapters-preview__grid { grid-template-columns: 1fr 1fr; }
    .reader-controls { padding: var(--space-sm) var(--space-md); }
    .reader-layout { padding: var(--space-md); }
    .chapter-nav { flex-direction: column; align-items: stretch; }
    .chapter-nav a, .chapter-nav button { text-align: center; justify-content: center; }
    .admin-section { padding: var(--space-lg); }
    .login-card { padding: var(--space-xl) var(--space-lg); }
}

@media (max-width: 420px) {
    .chapters-preview__grid { grid-template-columns: 1fr; }
    .mobile-toc__list { columns: 1; }
}


/* ── Print ─────────────────────────────────────────────────── */
@media print {
    .site-header, .reader-controls, .reader-sidebar,
    .chapter-nav, .site-footer, .toc-toggle, .header-toc { display: none; }
    .reader-layout { display: block; padding: 0; }
    .prose { font-size: 12pt; line-height: 1.6; }
    .chapter-section { page-break-before: always; }
}