/*
Theme Name: OC Recording Studio
Theme URI: https://ocrecording.com
Author: Asaf David Fulks
Author URI: https://ocrecording.com
Description: Custom dark studio theme for The OC Recording Company featuring StemDesk AI mixing product, In The Studio textbook, blog, and seamless navigation to the main HTML site. Dark aesthetic with orange accents matching the OC Recording brand.
Version: 2.8
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ocrecording
*/

/* ============================================
   CSS VARIABLES — OC ORANGE BRAND
   ============================================ */
:root {
    --bg-primary: #0a0a0e;
    --bg-secondary: #0f0f14;
    --bg-tertiary: #141419;
    --bg-card: #18181f;
    --bg-card-hover: #1e1e28;
    --bg-code: #1a1a22;
    --text-primary: #e8e8ec;
    --text-secondary: #a0a0b0;
    --text-muted: #6a6a7a;
    --text-bright: #ffffff;
    --accent: #e87c1e;
    --accent-hover: #f59333;
    --accent-dark: #c46815;
    --accent-glow: rgba(232, 124, 30, 0.12);
    --accent-glow-strong: rgba(232, 124, 30, 0.25);
    --gold: #d4a843;
    --green: #3ddc84;
    --blue: #5b9af5;
    --border: #252530;
    --border-light: #35354a;
    --border-accent: rgba(232, 124, 30, 0.3);
    --font-display: 'Oswald', 'Impact', sans-serif;
    --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --max-width: 1200px;
    --narrow: 820px;
    --transition: 0.3s ease;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1.15;
    color: var(--text-bright);
}
::selection { background: var(--accent); color: #fff; }

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(10, 10, 14, 0.92);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
}
.site-header.scrolled {
    background: rgba(10, 10, 14, 0.98);
    box-shadow: 0 4px 30px rgba(0,0,0,0.6);
}
.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}
.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}
.site-logo img { height: 36px; width: auto; }
.site-logo-text {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--text-primary);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    white-space: nowrap;
}
.site-logo-text span { color: var(--accent); }

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 0;
    align-items: center;
}
.main-nav a {
    display: block;
    padding: 0.5rem 0.85rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    transition: color var(--transition);
    white-space: nowrap;
}
.main-nav a:hover,
.main-nav .current-menu-item > a,
.main-nav .current_page_item > a { color: var(--accent); }

.main-nav .cta-btn a {
    background: var(--accent);
    color: var(--text-bright) !important;
    padding: 0.5rem 1.2rem;
    border-radius: 3px;
    margin-left: 0.5rem;
    transition: all var(--transition);
}
.main-nav .cta-btn a:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 15px rgba(232,124,30,0.3);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 6px 0;
    transition: all var(--transition);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.cart-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 10px;
    color: var(--text-secondary);
    transition: color var(--transition);
    flex-shrink: 0;
}
.cart-icon:hover { color: var(--accent); }
.cart-icon svg { display: block; }
.cart-count {
    position: absolute;
    top: 2px;
    right: 0;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    background: var(--accent);
    color: var(--text-bright);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    line-height: 16px;
    text-align: center;
    box-shadow: 0 0 0 2px rgba(10, 10, 14, 0.92);
}
.cart-count-empty { display: none; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-display);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    border-radius: 2px;
}
.btn-primary {
    background: var(--accent);
    color: var(--text-bright);
}
.btn-primary:hover {
    background: var(--accent-hover);
    color: var(--text-bright);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(232,124,30,0.35);
}
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.btn-sm {
    padding: 10px 22px;
    font-size: 0.78rem;
}
.btn-ghost {
    background: transparent;
    color: var(--accent);
    padding: 10px 0;
    border: none;
}
.btn-ghost:hover { color: var(--accent-hover); }

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 2rem 80px;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 25% 40%, var(--accent-glow) 0%, transparent 55%),
        radial-gradient(ellipse at 75% 60%, rgba(91,154,245,0.04) 0%, transparent 50%);
    pointer-events: none;
}
.hero-content {
    max-width: var(--max-width);
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 1;
}
.hero-label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--border-accent);
    padding: 6px 18px;
    margin-bottom: 1.5rem;
    background: var(--accent-glow);
}
.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 1.25rem;
}
.hero h1 .accent {
    color: var(--accent);
}
.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto 2.5rem;
    line-height: 1.85;
}
.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   SECTIONS
   ============================================ */
.section { padding: 90px 2rem; }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-narrow { max-width: var(--narrow); margin: 0 auto; }

.section-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.75rem;
}
.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: 1rem;
}
.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 680px;
    line-height: 1.85;
    margin-bottom: 3rem;
}
.section-dark { background: var(--bg-secondary); }
.section-darker { background: var(--bg-tertiary); }

.divider {
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin: 1.5rem 0 2rem;
}

/* ============================================
   FEATURE CARDS
   ============================================ */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2rem 1.75rem;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.feature-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px; height: 0;
    background: var(--accent);
    transition: height 0.4s ease;
}
.feature-card:hover {
    border-color: var(--border-light);
    background: var(--bg-card-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.feature-card:hover::after { height: 100%; }

.feature-icon {
    width: 48px; height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--accent-glow);
    border: 1px solid var(--border-accent);
    margin-bottom: 1.25rem;
    font-size: 1.3rem;
}
.feature-card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.75rem;
    letter-spacing: 0.03em;
}
.feature-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.75;
}

/* Large feature card variant */
.feature-card-lg {
    padding: 2.5rem;
}
.feature-card-lg h3 { font-size: 1.2rem; }
.feature-card-lg p { font-size: 0.95rem; }

/* ============================================
   SPEC / INFO BLOCKS
   ============================================ */
.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.spec-block {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
}
.spec-block h4 {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 0.75rem;
}
.spec-block p,
.spec-block ul {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.75;
}
.spec-block ul {
    list-style: none;
    padding: 0;
}
.spec-block ul li {
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border);
}
.spec-block ul li:last-child { border: none; }
.spec-block ul li::before {
    content: '›';
    color: var(--accent);
    margin-right: 8px;
    font-weight: bold;
}

/* ============================================
   PRICING TABLE
   ============================================ */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}
.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2.5rem 1.75rem;
    text-align: center;
    transition: all var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}
.pricing-card .btn {
    margin-top: auto;
}
.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.pricing-card.featured {
    border-color: var(--accent);
    box-shadow: 0 0 50px var(--accent-glow);
}
.pricing-card.featured::before {
    content: 'MOST POPULAR';
    position: absolute;
    top: -1px; left: 0; right: 0;
    background: var(--accent);
    color: var(--text-bright);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    padding: 5px 0;
    text-align: center;
}
.pricing-tier {
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}
.pricing-price {
    font-family: var(--font-display);
    font-size: 2.8rem;
    color: var(--text-bright);
    margin-bottom: 0.25rem;
    line-height: 1;
}
.pricing-price .period {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
}
.pricing-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    min-height: 1.2em;
}
.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}
.pricing-features li {
    padding: 0.45rem 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}
.pricing-features li::before {
    content: '✓';
    color: var(--accent);
    margin-right: 8px;
    font-weight: bold;
}

/* ============================================
   BOOK LAYOUT
   ============================================ */
.book-hero-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 4rem;
    align-items: start;
}
.book-cover-wrap {
    position: relative;
    perspective: 800px;
}
.book-cover-placeholder {
    width: 100%;
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    padding: 2rem;
    box-shadow: 15px 15px 50px rgba(0,0,0,0.5), 0 0 0 1px var(--border);
}
.book-cover-placeholder .book-title-display {
    font-family: var(--font-display);
    font-size: 1.6rem;
    text-align: center;
    line-height: 1.15;
    letter-spacing: 0.06em;
}
.book-info h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 0.5rem;
}
.book-author {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}
.book-description {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.85;
    margin-bottom: 2rem;
}
.book-stats {
    display: flex;
    gap: 2.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}
.book-stat-num {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--accent);
    line-height: 1;
}
.book-stat-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 4px;
}
.toc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 3rem;
}
.toc-item {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border);
}
.toc-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    flex-shrink: 0;
    min-width: 28px;
}
.toc-name {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   COMPARISON TABLE
   ============================================ */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.compare-table th {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-align: left;
}
.compare-table th.highlight {
    background: var(--accent);
    color: var(--text-bright);
    border-color: var(--accent-dark);
}
.compare-table td {
    border: 1px solid var(--border);
    padding: 0.6rem 1rem;
    color: var(--text-secondary);
}
.compare-table tr:nth-child(even) td { background: var(--bg-card); }

/* ============================================
   WORKFLOW / STEPS
   ============================================ */
.workflow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    counter-reset: step;
}
.workflow-step {
    position: relative;
    padding: 1.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    counter-increment: step;
}
.workflow-step::before {
    content: counter(step, decimal-leading-zero);
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 0.75rem;
    display: block;
}
.workflow-step h4 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}
.workflow-step p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.7;
}

/* ============================================
   CODE / TERMINAL BLOCKS
   ============================================ */
.terminal-block {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.25rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--green);
    line-height: 1.8;
    overflow-x: auto;
    margin: 1.5rem 0;
}
.terminal-block .prompt { color: var(--accent); }
.terminal-block .comment { color: var(--text-muted); }

/* ============================================
   BLOG GRID
   ============================================ */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.75rem;
}
.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all var(--transition);
}
.post-card:hover {
    border-color: var(--border-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.post-card-image { width: 100%; height: 200px; object-fit: cover; }
.post-card-content { padding: 1.5rem; }
.post-card-meta {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}
.post-card-title { font-size: 1.05rem; margin-bottom: 0.75rem; line-height: 1.3; }
.post-card-title a { color: var(--text-primary); }
.post-card-title a:hover { color: var(--accent); }
.post-card-excerpt { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.65; }

/* Single Post */
.single-post-header {
    padding-top: 120px;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 3rem;
}
.single-post-title { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-bottom: 1rem; }
.single-post-meta {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.post-content { max-width: var(--narrow); margin: 0 auto; font-size: 1.05rem; line-height: 1.85; }
.post-content h2 { font-size: 1.5rem; margin: 2.5rem 0 1rem; }
.post-content h3 { font-size: 1.2rem; margin: 2rem 0 0.75rem; }
.post-content p { margin-bottom: 1.5rem; color: var(--text-secondary); }
.post-content img { border: 1px solid var(--border); margin: 2rem 0; }
.post-content blockquote {
    border-left: 3px solid var(--accent);
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-style: italic;
}
.post-content ul, .post-content ol {
    margin: 0 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}
.post-content li { margin-bottom: 0.4rem; }
.post-content code {
    background: var(--bg-code);
    padding: 2px 6px;
    font-family: var(--font-mono);
    font-size: 0.9em;
    border-radius: 3px;
}
.post-content pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 4px;
}
.post-content pre code {
    background: none;
    padding: 0;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 4rem 2rem 2rem;
}
.footer-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
}
.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.75;
    margin-top: 1rem;
}
.footer-heading {
    font-family: var(--font-display);
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.6rem; }
.footer-links a { color: var(--text-secondary); font-size: 0.88rem; }
.footer-links a:hover { color: var(--accent); }

.footer-bottom {
    max-width: var(--max-width);
    margin: 2.5rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ============================================
   PAGINATION (WP)
   ============================================ */
.nav-links {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}
.nav-links .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    background: var(--bg-card);
    transition: all var(--transition);
}
.nav-links .page-numbers:hover,
.nav-links .page-numbers.current {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .book-hero-grid { grid-template-columns: 250px 1fr; gap: 2.5rem; }
}
@media (max-width: 900px) {
    .menu-toggle { display: block; }
    .main-nav {
        position: fixed;
        top: 68px; left: 0; right: 0; bottom: 0;
        background: var(--bg-primary);
        display: none;
        padding: 2rem;
        overflow-y: auto;
        border-top: 1px solid var(--border);
    }
    .main-nav.active { display: block; }
    .main-nav ul { flex-direction: column; }
    .main-nav a { padding: 0.85rem 0; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
    .main-nav .cta-btn a { margin-left: 0; display: block; text-align: center; margin-top: 0.5rem; }

    .hero { min-height: 70vh; padding-top: 100px; }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-card:last-child { grid-column: 1 / -1; max-width: 50%; margin: 0 auto; }
    .book-hero-grid { grid-template-columns: 1fr; }
    .book-cover-wrap { max-width: 250px; margin: 0 auto; }
    .toc-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .compare-table { font-size: 0.8rem; }
    .compare-table th, .compare-table td { padding: 0.5rem; }
}
@media (max-width: 600px) {
    .section { padding: 60px 1.25rem; }
    .hero-cta { flex-direction: column; align-items: center; }
    .btn { width: 100%; justify-content: center; }
    .pricing-grid { grid-template-columns: 1fr; max-width: 380px; margin-left: auto; margin-right: auto; }
    .pricing-card:last-child { grid-column: auto; max-width: none; margin: 0; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
    .blog-grid { grid-template-columns: 1fr; }
    .book-stats { gap: 1.5rem; }
    .spec-grid { grid-template-columns: 1fr; }
    .workflow-steps { grid-template-columns: 1fr; }
}