/* ========================================
   Paul Tsai - Global Styles
   Aesthetic: Refined dark finance + editorial
   ======================================== */

:root {
    --bg-primary: #0a0b0f;
    --bg-secondary: #111318;
    --bg-card: #161820;
    --bg-card-hover: #1c1e28;
    --text-primary: #f0f0f2;
    --text-secondary: #a0a4b4;
    --text-muted: #6b7084;
    --accent: #c8a44e;
    --accent-light: #dfc06a;
    --accent-dark: #a88832;
    --accent-glow: rgba(200, 164, 78, 0.15);
    --border: rgba(255,255,255,0.06);
    --border-light: rgba(255,255,255,0.1);
    --success: #4ecdc4;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --font-display: 'Playfair Display', serif;
    --font-body: 'Noto Sans JP', 'DM Sans', sans-serif;
    --font-mono: 'DM Sans', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-light); }

img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.nav.scrolled {
    background: rgba(10, 11, 15, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo { display: flex; gap: 4px; font-size: 1.1rem; letter-spacing: 0.15em; }
.logo-paul { color: var(--text-primary); font-weight: 700; }
.logo-tsai { color: var(--accent); font-weight: 300; }

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.03em;
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-cta {
    background: var(--accent) !important;
    color: var(--bg-primary) !important;
    padding: 10px 24px !important;
    border-radius: var(--radius-sm);
    font-weight: 600 !important;
    font-size: 0.825rem !important;
    letter-spacing: 0.05em !important;
}

.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--accent-light) !important; color: var(--bg-primary) !important; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ========================================
   Hero
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(200, 164, 78, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(78, 116, 200, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(200, 164, 78, 0.05) 0%, transparent 40%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.floating-numbers {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.float-num {
    position: absolute;
    left: var(--x);
    top: var(--y);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: rgba(200, 164, 78, 0.12);
    font-weight: 700;
    letter-spacing: 0.1em;
    animation: floatNum 12s ease-in-out infinite;
    animation-delay: var(--delay);
}

@keyframes floatNum {
    0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
    50% { transform: translateY(-20px) rotate(3deg); opacity: 0.6; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    padding-top: 120px;
}

.hero-tag {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.hero-title {
    margin-bottom: 28px;
}

.hero-title-main {
    display: block;
    font-family: var(--font-body);
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    font-weight: 900;
    line-height: 1.2;
    color: var(--text-primary);
}

.hero-title-accent {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.15;
    background: linear-gradient(135deg, var(--accent), var(--accent-light), #e8d48a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 520px;
    margin-bottom: 40px;
    line-height: 1.9;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 1;
}

.hero-scroll span {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-body);
    letter-spacing: 0.04em;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--accent-light);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(200, 164, 78, 0.25);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--accent);
    margin-top: 24px;
}

.link-arrow:hover { gap: 12px; }

/* ========================================
   Section Utilities
   ======================================== */
.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-body);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header .section-subtitle {
    margin: 0 auto;
}

/* ========================================
   Stats
   ======================================== */
.stats {
    padding: 80px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.stat-card {
    background: var(--bg-secondary);
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover { background: var(--bg-card); }

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 12px;
}

.stat-unit {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-weight: 400;
}

.stat-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.stat-detail {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   About Preview
   ======================================== */
.about-preview {
    padding: 120px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}

.about-image-wrapper { position: relative; }

.about-image-frame {
    aspect-ratio: 3/4;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.about-image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.placeholder-initials {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.4;
}

.placeholder-name {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
}

.about-image-accent {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 120px;
    height: 120px;
    border: 2px solid var(--accent);
    border-radius: var(--radius-md);
    opacity: 0.2;
}

.about-text .section-title { margin-bottom: 24px; }

.about-lead {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 400;
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-text p {
    color: var(--text-secondary);
    line-height: 1.9;
}

/* ========================================
   Highlights
   ======================================== */
.highlights {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.highlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.highlight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: var(--transition);
}

.highlight-card:hover {
    border-color: rgba(200, 164, 78, 0.2);
    transform: translateY(-4px);
    background: var(--bg-card-hover);
}

.highlight-card:hover::before { opacity: 1; }

.highlight-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 24px;
}

.highlight-icon svg {
    stroke: var(--accent);
    stroke-width: 1.5;
}

.highlight-card h3 {
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 8px;
    font-weight: 600;
}

.highlight-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.highlight-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.highlights-cta {
    text-align: center;
    margin-top: 48px;
}

/* ========================================
   Quote
   ======================================== */
.quote-section {
    padding: 120px 0;
    position: relative;
}

.quote-wrapper {
    text-align: center;
    position: relative;
}

.quote-mark {
    font-family: var(--font-display);
    font-size: 8rem;
    color: var(--accent);
    opacity: 0.15;
    line-height: 1;
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
}

blockquote {
    font-family: var(--font-body);
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 500;
    line-height: 2;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

cite {
    display: block;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--accent);
    font-style: normal;
    font-weight: 400;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    padding: 80px 0 120px;
}

.cta-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 80px 60px;
    position: relative;
    overflow: hidden;
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 900;
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.cta-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.cta-circle {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    border: 1px solid rgba(200, 164, 78, 0.08);
    top: -100px;
    right: -100px;
}

.cta-circle-2 {
    width: 200px;
    height: 200px;
    top: auto;
    right: auto;
    bottom: -60px;
    left: -60px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    display: inline-flex;
    gap: 4px;
    font-size: 1.1rem;
    letter-spacing: 0.15em;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.875rem;
    max-width: 360px;
    line-height: 1.8;
}

.footer-links-group h4 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.footer-links-group ul { list-style: none; }

.footer-links-group li { margin-bottom: 12px; }

.footer-links-group a {
    color: var(--text-muted);
    font-size: 0.875rem;
    transition: var(--transition);
}

.footer-links-group a:hover { color: var(--accent); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-disclaimer {
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    opacity: 0.7;
}

/* ========================================
   Animations
   ======================================== */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    transition-delay: var(--delay, 0s);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Page Header (inner pages)
   ======================================== */
.page-header {
    padding: 160px 0 80px;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 50%, rgba(200, 164, 78, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 80%, rgba(78, 116, 200, 0.03) 0%, transparent 50%);
}

.page-header-content {
    position: relative;
    z-index: 1;
}

.page-header .section-tag { margin-bottom: 16px; }

.page-header .section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
}

.page-header .section-subtitle {
    font-size: 1.1rem;
    max-width: 680px;
}

/* ========================================
   Content Sections (inner pages)
   ======================================== */
.content-section {
    padding: 100px 0;
}

.content-section.alt { background: var(--bg-secondary); }

.content-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.content-prose {
    max-width: 720px;
}

.content-prose h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    margin-top: 48px;
    color: var(--text-primary);
}

.content-prose h3:first-child { margin-top: 0; }

.content-prose p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 20px;
}

.content-prose strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px;
    top: 6px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
}

.timeline-year {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 6px;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Method Cards */
.method-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 48px 40px;
    margin-bottom: 32px;
    transition: var(--transition);
}

.method-card:hover {
    border-color: rgba(200, 164, 78, 0.2);
}

.method-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 16px;
}

.method-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.method-card p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 0.95rem;
}

/* Book Detail */
.book-info-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 60px;
    align-items: start;
}

.book-cover-placeholder {
    aspect-ratio: 2/3;
    background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover));
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    text-align: center;
    padding: 40px 24px;
    position: relative;
    overflow: hidden;
}

.book-cover-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(200,164,78,0.05), transparent);
}

.book-cover-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.book-cover-author {
    font-size: 0.85rem;
    color: var(--accent);
    position: relative;
    z-index: 1;
}

.book-cover-publisher {
    font-size: 0.75rem;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
}

.book-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 32px 0;
}

.book-meta-item {
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.book-meta-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.book-meta-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* TOC */
.toc-list {
    list-style: none;
    counter-reset: toc;
}

.toc-item {
    counter-increment: toc;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: baseline;
    gap: 16px;
    transition: var(--transition);
}

.toc-item:hover { background: var(--bg-card); }

.toc-item::before {
    content: counter(toc, decimal-leading-zero);
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--accent);
    opacity: 0.5;
    min-width: 32px;
}

.toc-main {
    font-weight: 600;
    color: var(--text-primary);
}

.toc-sub {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Contact Form */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea {
    min-height: 160px;
    resize: vertical;
}

.contact-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 40px;
    margin-bottom: 24px;
}

.contact-info-card h4 {
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.contact-info-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .highlights-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { gap: 48px; }
    .book-info-grid { grid-template-columns: 240px 1fr; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 100px 40px;
        gap: 24px;
        transition: var(--transition-slow);
        border-left: 1px solid var(--border);
    }

    .nav-links.open { right: 0; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .highlights-grid { grid-template-columns: 1fr; }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image-wrapper { max-width: 360px; }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .cta-card { padding: 60px 32px; }

    .book-info-grid {
        grid-template-columns: 1fr;
    }

    .book-cover-placeholder {
        max-width: 240px;
        margin: 0 auto;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .content-grid-2 {
        grid-template-columns: 1fr;
    }

    .book-meta { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .hero-title-main { font-size: 2rem; }
    .hero-title-accent { font-size: 2.4rem; }
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
}