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

:root {
    --bg: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a28;
    --text: #e8e8f0;
    --text-dim: #8888a0;
    --accent: #00c8c8;
    --accent-glow: rgba(0, 200, 200, 0.3);
    --accent-dark: #009090;
    --gold: #c8a84e;
    --radius: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ── NAV ── */
#nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: background var(--transition), backdrop-filter var(--transition);
}

#nav.scrolled {
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 3px;
}

.nav-links { display: flex; gap: 32px; }

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color var(--transition);
}

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

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

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

/* ── HERO ── */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(0,200,200,0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(0,80,120,0.08) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    display: flex;
    align-items: center;
    gap: 80px;
    max-width: 1100px;
    width: 100%;
}

.hero-cover {
    position: relative;
    flex-shrink: 0;
}

.cover-img {
    width: 340px;
    border-radius: 4px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.6), 0 0 40px var(--accent-glow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.cover-img:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 40px 100px rgba(0,0,0,0.7), 0 0 60px var(--accent-glow);
}

.cover-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    z-index: -1;
    filter: blur(40px);
    opacity: 0.5;
}

.hero-text { flex: 1; }

.hero-tag {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
}

.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: 5rem;
    font-weight: 900;
    letter-spacing: 8px;
    line-height: 1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 480px;
}

/* ── BUTTONS ── */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.5px;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-buy {
    background: rgba(0,200,200,0.1);
    color: var(--accent);
    border: 1px solid rgba(0,200,200,0.25);
    width: 100%;
    text-align: center;
}

.btn-buy:hover {
    background: rgba(0,200,200,0.2);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.btn-disabled {
    opacity: 0.5;
    cursor: default;
    pointer-events: none;
}

/* ── SECTIONS ── */
section { padding: 100px 0; }

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-sub {
    color: var(--text-dim);
    font-size: 1rem;
    margin-bottom: 48px;
}

/* ── BOOK SECTION ── */
#book { background: linear-gradient(180deg, var(--bg) 0%, #0d0d14 100%); }

.book-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: start;
}

.book-blurb p {
    margin-bottom: 20px;
    color: var(--text-dim);
    font-size: 1.05rem;
}

.book-blurb .blurb-lead {
    color: var(--text);
    font-size: 1.15rem;
    font-weight: 400;
}

.book-blurb em { color: var(--accent); font-style: italic; }

.detail-card {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.detail-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
}

.detail-value {
    font-weight: 500;
    color: var(--text);
    font-size: 0.95rem;
}

/* ── READERS OF ── */
#readersof {
    background: #0d0d14;
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.04);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.readers-line {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.readers-line em {
    color: var(--accent);
    font-style: italic;
}

/* ── EXCERPT ── */
#excerpt {
    background: var(--bg);
    padding: 80px 0;
    text-align: center;
}

.excerpt-box {
    max-width: 680px;
    margin: 0 auto 32px;
    text-align: left;
    position: relative;
    padding: 32px 40px;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
}

.excerpt-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent), transparent);
    border-radius: 3px 0 0 3px;
}

.excerpt-box p {
    font-family: Georgia, 'Playfair Display', serif;
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.9;
    margin-bottom: 16px;
}

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

.excerpt-msg {
    font-family: 'Inter', sans-serif !important;
    font-style: italic !important;
    color: var(--accent) !important;
    font-size: 0.85rem !important;
    padding: 8px 0;
}

.excerpt-cta { margin-top: 8px; }

/* ── SELL POINTS ── */
#sellpoints {
    background: #0d0d14;
    padding: 60px 0;
}

.sell-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    text-align: center;
}

.sell-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.sell-num {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
}

.sell-text {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.5;
    max-width: 240px;
}

@media (max-width: 768px) {
    .sell-grid { grid-template-columns: 1fr; gap: 28px; }
    .excerpt-box { padding: 24px 20px; }
}

/* ── BUY GRID ── */
#buy { background: #0d0d14; }

.buy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.buy-card {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
}

.buy-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0,200,200,0.15);
    transform: translateY(-4px);
}

.featured-card {
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(0,200,200,0.1);
}

.coming-soon-card { opacity: 0.7; }

.buy-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--bg);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 4px 14px;
    border-radius: 20px;
}

.coming-soon-card .buy-badge {
    background: var(--gold);
}

.buy-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.buy-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.buy-platform {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 8px;
}

.buy-note {
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 8px;
}

.buy-card .btn-buy { margin-top: 16px; }

/* ── INTERNATIONAL SELECT ── */
.intl-select {
    width: 100%;
    margin-top: 10px;
    padding: 6px 10px;
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 6px;
    color: var(--text-dim);
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2388889f'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    transition: all var(--transition);
}

.intl-select:hover {
    border-color: rgba(0,200,200,0.25);
    color: var(--accent);
}

.intl-select:focus {
    border-color: var(--accent);
}

.intl-select option {
    background: #1a1a28;
    color: var(--text);
}

/* ── LISTEN GRID ── */
#listen { background: linear-gradient(180deg, #0d0d14 0%, var(--bg) 100%); }

.listen-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.listen-card {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
}

.listen-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0,200,200,0.15);
    transform: translateY(-4px);
}

.listen-icon { font-size: 2.5rem; margin-bottom: 16px; }

.listen-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.listen-platform {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 4px;
}

.listen-desc {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 16px;
}

.listen-card .btn-buy { margin-top: auto; }

/* ── AUTHOR ── */
#author { background: var(--bg); }

.author-content { max-width: 640px; }

.author-text p {
    color: var(--text-dim);
    font-size: 1.05rem;
    margin-bottom: 16px;
}

.author-text em { color: var(--accent); }

/* ── SIGNUP ── */
#signup {
    background: #0d0d14;
    padding: 80px 0;
}

.signup-box {
    max-width: 520px;
    margin: 0 auto;
    text-align: center;
}

.signup-desc {
    color: var(--text-dim);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.signup-form {
    display: flex;
    gap: 8px;
}

.signup-input {
    flex: 1;
}

.signup-btn {
    flex-shrink: 0;
    white-space: nowrap;
}

.signup-msg {
    font-size: 0.8rem;
    margin-top: 12px;
    min-height: 1.2em;
}

@media (max-width: 480px) {
    .signup-form { flex-direction: column; }
}

/* ── AFFILIATE ── */
.aff-how {
    display: flex;
    gap: 24px;
    margin: 40px 0;
}

.aff-step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
}

.aff-step-num {
    width: 40px; height: 40px;
    background: var(--accent);
    color: var(--bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.aff-step-text {
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.5;
}

.aff-form {
    max-width: 480px;
    margin: 0 auto;
}

.aff-link-box {
    max-width: 480px;
    margin: 0 auto;
}

.aff-link-row {
    display: flex;
    gap: 8px;
}

.aff-link-row .form-input {
    flex: 1;
    color: var(--accent);
    font-weight: 600;
}

@media (max-width: 768px) {
    .aff-how { flex-direction: column; gap: 16px; }
}

/* ── FOOTER ── */
footer {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 40px 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-inner p {
    color: var(--text-dim);
    font-size: 0.85rem;
}

.footer-links { display: flex; gap: 24px; }

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition);
}

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

/* ── SCROLL HINT ── */
.scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-hint span {
    font-size: 0.7rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-dim);
}

.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(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ── METRICS ── */
#metrics { background: linear-gradient(180deg, var(--bg) 0%, #0d0d14 100%); padding: 80px 0; }

.metrics-strip {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.mcard {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    padding: 20px 10px 16px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition);
}

.mcard::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--mc);
    opacity: 0.6;
}

.mcard:hover {
    border-color: rgba(255,255,255,0.1);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.mval {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 8px;
}

.mlabel {
    display: block;
    font-size: 0.55rem;
    font-weight: 700;
    color: rgba(255,255,255,0.5);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 6px;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.mdesc {
    display: block;
    font-size: 0.55rem;
    color: var(--text-dim);
    line-height: 1.5;
}

@media (max-width: 1000px) {
    .metrics-strip { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 600px) {
    .metrics-strip { grid-template-columns: repeat(2, 1fr); }
    .mval { font-size: 1.3rem; }
}

/* ── ISBN ── */
.buy-isbn {
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-bottom: 4px;
    font-family: monospace;
}

/* ── KASPA CARD ── */
.kaspa-card { border-color: var(--gold); }
.kaspa-card .buy-icon { color: var(--gold); }

/* ── MODAL ── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.active { display: flex; overflow-y: auto; }

.modal {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 40px;
    max-width: 520px;
    width: 100%;
    position: relative;
    margin: auto;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-close {
    position: fixed;
    top: 16px; right: 20px;
    background: rgba(0,0,0,0.6);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 210;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.modal-close:hover {
    background: rgba(255,255,255,0.1);
    color: white;
}

.modal h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.modal-desc {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-bottom: 24px;
    line-height: 1.6;
}

.kaspa-address-box {
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(200,168,78,0.3);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 24px;
    text-align: center;
}

.kaspa-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.kaspa-address {
    display: block;
    font-size: 0.65rem;
    color: var(--gold);
    word-break: break-all;
    margin-bottom: 12px;
    line-height: 1.5;
}

.btn-copy {
    background: rgba(200,168,78,0.15);
    color: var(--gold);
    border: 1px solid rgba(200,168,78,0.3);
    padding: 8px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all var(--transition);
}

.btn-copy:hover {
    background: rgba(200,168,78,0.25);
    border-color: var(--gold);
}

.kaspa-steps p {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.kaspa-steps a {
    color: var(--accent);
    text-decoration: none;
}

.kaspa-steps a:hover { text-decoration: underline; }

/* ── KASPA FORM ── */
.form-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
    margin-bottom: 6px;
    margin-top: 16px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color var(--transition);
}

.form-input:focus { border-color: var(--accent); }

.form-note {
    font-size: 0.8rem;
    color: var(--accent);
    margin-top: 12px;
}

.form-error {
    color: #ff6b6b;
    font-size: 0.8rem;
    margin-top: 8px;
    min-height: 1.2em;
}

.format-toggle { display: flex; gap: 8px; }

.format-btn {
    flex: 1;
    padding: 10px;
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    color: var(--text-dim);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.format-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(0,200,200,0.1);
}

.kaspa-amount-box {
    text-align: center;
    margin-bottom: 20px;
}

.kaspa-amount-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 8px 0 4px;
}

.kaspa-amount {
    font-family: 'Playfair Display', serif;
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--gold);
}

.btn-copy-amount {
    background: rgba(200,168,78,0.1);
    border: 1px solid rgba(200,168,78,0.25);
    border-radius: 6px;
    color: var(--gold);
    font-size: 1rem;
    padding: 6px 8px;
    cursor: pointer;
    transition: all var(--transition);
    line-height: 1;
}

.btn-copy-amount:hover {
    background: rgba(200,168,78,0.2);
    border-color: var(--gold);
}

.kaspa-amount-usd {
    font-size: 0.8rem;
    color: var(--text-dim);
}

.kaspa-rate {
    font-size: 0.7rem;
    color: var(--text-dim);
    text-align: center;
    margin-top: 16px;
}

/* ── PAYMENT STATUS ── */
.kaspa-status {
    text-align: center;
    padding: 20px;
    margin-top: 16px;
}

.kaspa-status p {
    color: var(--accent);
    font-size: 0.9rem;
    margin-top: 12px;
}

.kaspa-timing {
    color: var(--text-dim) !important;
    font-size: 0.75rem !important;
    margin-top: 16px !important;
    line-height: 1.6 !important;
}

.kaspa-timing a {
    color: var(--accent);
    text-decoration: none;
}

.kaspa-timing a:hover { text-decoration: underline; }

.kaspa-support a {
    color: var(--accent);
    text-decoration: none;
}

.kaspa-support a:hover { text-decoration: underline; }

.status-spinner {
    width: 32px; height: 32px;
    border: 3px solid rgba(0,200,200,0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── ANIMATIONS ── */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .cover-img { width: 260px; }

    .hero-title { font-size: 3.5rem; letter-spacing: 4px; }

    .hero-subtitle { margin: 0 auto 32px; }

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

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

    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0; right: 0;
        background: rgba(10,10,15,0.98);
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .nav-toggle { display: flex; }

    .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.8rem; }
    .cover-img { width: 220px; }
    .buy-grid { grid-template-columns: 1fr; }
    .listen-grid { grid-template-columns: 1fr; }
    section { padding: 70px 0; }
}