/* =============================================
   AuthorCentral.uk homepage
   Editorial book-site styling for public landing pages.
   ============================================= */

:root {
    --primary-color: #d7ad5b;
    --secondary-color: #a34c43;
    --accent-color: #f0d38d;
    --success-color: #8eb57c;
    --warning-color: #f0b35f;
    --danger-color: #d86a6a;
    --info-color: #93b8c9;

    --text-primary: #fff8ea;
    --text-secondary: rgba(255, 248, 234, 0.72);
    --text-muted: rgba(255, 248, 234, 0.52);

    --bg-primary: #11100e;
    --bg-secondary: #191612;
    --bg-tertiary: #2a2119;

    --ink: #0e0d0b;
    --paper: #fff8ea;
    --paper-soft: #f6ead1;
    --wine: #642b33;
    --wine-2: #873d38;
    --gold: #d7ad5b;
    --gold-soft: #f0d38d;
    --oak: #8a5d37;
    --line: rgba(255, 248, 234, 0.16);
    --line-strong: rgba(240, 211, 141, 0.38);
    --panel: rgba(25, 22, 18, 0.78);
    --panel-strong: rgba(36, 29, 23, 0.9);
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
    --radius: 14px;
    --radius-lg: 26px;
    --font-primary: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-reading: Garamond, "Adobe Garamond Pro", "EB Garamond", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
    --font-display: var(--font-reading);
}

body {
    background: #060b10;
    color: var(--text-primary);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    opacity: 0.08;
    background-image:
        linear-gradient(rgba(255, 248, 234, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 248, 234, 0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(to bottom, #000, transparent 82%);
}

.bg-animation {
    position: fixed;
    inset: 0;
    z-index: 0;
    display: block;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(4, 8, 12, 0.95) 0%, rgba(4, 8, 12, 0.84) 34%, rgba(4, 8, 12, 0.44) 68%, rgba(4, 8, 12, 0.66) 100%),
        linear-gradient(to bottom, rgba(4, 8, 12, 0.1) 0%, rgba(4, 8, 12, 0.18) 60%, #0d1114 100%),
        url("/assets/images/authorcentral-bookcase-photoreal.webp") center center / cover no-repeat;
}

header,
main,
footer {
    position: relative;
    z-index: 1;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 11, 9, 0.84);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 248, 234, 0.12);
}

nav {
    width: min(1180px, calc(100vw - 40px));
    margin: 0 auto;
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1.5rem;
}

.site-brand-float {
    position: fixed;
    top: clamp(0.65rem, 1.25vw, 1rem);
    left: max(1rem, calc((100vw - 1180px) / 2 - 9rem));
    z-index: 140;
    display: inline-flex;
    align-items: center;
    gap: 0.95rem;
    color: var(--paper);
    font-family: var(--font-display);
    font-size: clamp(1.45rem, 2vw, 1.9rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    text-shadow: 0 4px 18px rgba(0, 0, 0, 0.72);
}

.site-brand-float:hover {
    color: var(--paper);
}

.site-brand-seal {
    display: inline-grid;
    width: clamp(5.5rem, 8vw, 8.4rem);
    height: clamp(5.5rem, 8vw, 8.4rem);
    place-items: center;
    border-radius: 50%;
    overflow: hidden;
    background: rgba(255, 248, 234, 0.03);
    box-shadow: 0 18px 46px rgba(0, 0, 0, 0.34);
}

.site-brand-seal img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--paper);
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2vw, 1.55rem);
    font-weight: 700;
    letter-spacing: -0.03em;
}

.logo:hover {
    color: var(--paper);
}

.logo-mark {
    display: inline-grid;
    width: 46px;
    height: 46px;
    place-items: center;
    border-radius: 50%;
    overflow: hidden;
    background: rgba(255, 248, 234, 0.04);
    box-shadow: 0 0 0 1px rgba(240, 211, 141, 0.26), 0 12px 28px rgba(0, 0, 0, 0.22);
}

.logo-mark img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(0.55rem, 1.1vw, 1.05rem);
}

.nav-links a {
    color: rgba(255, 248, 234, 0.78);
    font-family: var(--font-primary);
    font-size: 0.88rem;
    font-weight: 650;
}

.nav-links a:not(.btn-primary, .btn-secondary) {
    position: relative;
    padding: 0.45rem 0;
}

.nav-links a:not(.btn-primary, .btn-secondary)::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0.1rem;
    left: 0;
    height: 1px;
    background: var(--gold);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.2s ease;
}

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

.nav-links a:not(.btn-primary, .btn-secondary):hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.btn-primary,
.btn-secondary,
.ac-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    border-radius: 999px;
    padding: 0.8rem 1.18rem;
    border: 1px solid transparent;
    font-family: var(--font-primary);
    font-weight: 800;
    letter-spacing: -0.01em;
    line-height: 1;
}

.btn-primary,
.ac-btn-primary {
    background: linear-gradient(135deg, var(--gold-soft), var(--gold));
    color: #171007;
    box-shadow: 0 14px 34px rgba(215, 173, 91, 0.24);
}

.btn-primary:hover,
.ac-btn-primary:hover {
    color: #171007;
    transform: translateY(-2px);
    box-shadow: 0 18px 42px rgba(215, 173, 91, 0.32);
}

.btn-secondary,
.ac-btn-secondary {
    background: rgba(255, 248, 234, 0.06);
    border-color: rgba(255, 248, 234, 0.2);
    color: var(--paper);
}

.btn-secondary:hover,
.ac-btn-secondary:hover {
    background: rgba(255, 248, 234, 0.12);
    border-color: rgba(240, 211, 141, 0.46);
    color: var(--paper);
    transform: translateY(-2px);
}

.mobile-menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    padding: 0;
    border: 1px solid rgba(255, 248, 234, 0.18);
    border-radius: 50%;
    background: rgba(255, 248, 234, 0.06);
    color: var(--paper);
    cursor: pointer;
}

.mobile-menu-toggle span:not(.sr-only) {
    display: block;
    width: 18px;
    height: 2px;
    margin: 4px auto;
    border-radius: 99px;
    background: currentColor;
}

/* Landing layout */
.landing-page {
    width: min(1180px, calc(100vw - 40px));
    margin: 0 auto;
    font-family: var(--font-reading);
    font-size: 1.06rem;
    text-rendering: optimizeLegibility;
}

.landing-hero {
    position: relative;
    isolation: isolate;
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
    gap: clamp(2rem, 5vw, 5rem);
    align-items: start;
    min-height: auto;
    padding: clamp(2rem, 3.8vw, 3.5rem) 0 clamp(3rem, 6vw, 5rem);
}

.landing-hero::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: -4rem;
    left: 50%;
    z-index: -2;
    width: 100vw;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, transparent 0%, rgba(13, 17, 20, 0.35) 72%, #0d1114 100%);
}

.landing-hero::after {
    content: "";
    position: absolute;
    bottom: -4rem;
    left: 50%;
    z-index: -1;
    width: 100vw;
    height: 18rem;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, transparent, #0d1114);
    pointer-events: none;
}

.hero-copy {
    max-width: 650px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    margin: 0 0 1rem;
    color: var(--gold-soft);
    font-family: var(--font-primary);
    font-size: 0.76rem;
    font-weight: 850;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 2.4rem;
    height: 1px;
    background: currentColor;
    opacity: 0.72;
}

.landing-hero h1,
.section-intro h2,
.split-copy h2,
.reader-section h2,
.workflow-section h2,
.pricing-section h2,
.final-cta h2 {
    color: var(--paper);
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.028em;
}

.landing-hero h1 {
    max-width: 16ch;
    margin: 0 0 1.55rem;
    font-size: clamp(3rem, 5.6vw, 5.85rem);
    line-height: 1.03;
}

.hero-lede {
    max-width: 43rem;
    margin: 0;
    color: var(--text-secondary);
    font-size: clamp(1.08rem, 1.7vw, 1.35rem);
    line-height: 1.82;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 2rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
    max-width: 34rem;
    margin: 2.2rem 0 0;
}

.hero-stats div {
    padding: 1rem;
    border: 1px solid rgba(255, 248, 234, 0.12);
    border-radius: 18px;
    background: rgba(255, 248, 234, 0.045);
}

.hero-stats dt {
    color: var(--gold-soft);
    font-family: var(--font-display);
    font-size: clamp(1.45rem, 3.2vw, 2.15rem);
    line-height: 1;
}

.hero-stats dd {
    margin: 0.3rem 0 0;
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.45;
}

.hero-showcase {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 560px;
}

.platform-preview-panel {
    width: min(100%, 590px);
    margin-left: auto;
    padding: clamp(1.3rem, 2.8vw, 2rem);
    border: 1px solid rgba(240, 211, 141, 0.24);
    border-radius: 30px;
    background:
        linear-gradient(145deg, rgba(8, 12, 17, 0.76), rgba(30, 22, 18, 0.68)),
        rgba(7, 10, 13, 0.76);
    box-shadow: 0 34px 90px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(18px);
}

.panel-kicker {
    margin: 0 0 0.8rem;
    color: var(--gold-soft);
    font-family: var(--font-primary);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.platform-preview-panel h2 {
    max-width: 15ch;
    margin: 0 0 1.55rem;
    color: var(--paper);
    font-family: var(--font-display);
    font-size: clamp(2.05rem, 3.4vw, 3.45rem);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.08;
}

.platform-preview-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    font-family: var(--font-primary);
}

.platform-preview-grid article {
    min-height: 132px;
    padding: 0.95rem;
    border: 1px solid rgba(255, 248, 234, 0.13);
    border-radius: 18px;
    background: rgba(255, 248, 234, 0.055);
}

.platform-preview-grid span {
    display: block;
    margin-bottom: 0.55rem;
    color: rgba(240, 211, 141, 0.72);
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.platform-preview-grid strong {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--paper);
    font-size: 0.98rem;
    line-height: 1.25;
}

.platform-preview-grid small {
    display: block;
    color: rgba(255, 248, 234, 0.62);
    font-size: 0.8rem;
    line-height: 1.45;
}

.library-card {
    position: absolute;
    inset: 2rem 0 auto 2.4rem;
    overflow: hidden;
    min-height: 470px;
    border: 1px solid rgba(240, 211, 141, 0.24);
    border-radius: 34px;
    background:
        linear-gradient(160deg, rgba(255, 248, 234, 0.12), rgba(255, 248, 234, 0.03)),
        var(--panel);
    box-shadow: var(--shadow);
}

.library-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to top, rgba(13, 11, 9, 0.92), transparent 48%),
        linear-gradient(120deg, rgba(215, 173, 91, 0.18), transparent 42%);
}

.library-card img {
    width: 100%;
    height: 470px;
    object-fit: cover;
    transform: scale(1.02);
}

.library-card-caption {
    position: absolute;
    right: 1.4rem;
    bottom: 1.4rem;
    left: 1.4rem;
    z-index: 2;
    display: grid;
    gap: 0.35rem;
    padding: 1rem;
    border: 1px solid rgba(255, 248, 234, 0.14);
    border-radius: 20px;
    background: rgba(13, 11, 9, 0.62);
    backdrop-filter: blur(16px);
}

.library-card-caption span {
    color: var(--gold-soft);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.library-card-caption strong {
    max-width: 29rem;
    color: var(--paper);
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    line-height: 1.15;
}

.featured-books {
    position: absolute;
    right: clamp(0rem, 2vw, 1rem);
    bottom: 0;
    left: 0;
    height: 365px;
    pointer-events: none;
}

.book-cover {
    position: absolute;
    overflow: visible;
    margin: 0;
    border-radius: 12px;
    transform-style: preserve-3d;
    filter: drop-shadow(0 28px 40px rgba(0, 0, 0, 0.48));
}

.book-cover::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: 12px;
    box-shadow:
        inset 11px 0 18px rgba(0, 0, 0, 0.28),
        inset -1px 0 0 rgba(255, 255, 255, 0.28);
    pointer-events: none;
}

.book-cover::after {
    content: "";
    position: absolute;
    top: 2%;
    right: -15px;
    width: 16px;
    height: 96%;
    border-radius: 0 7px 7px 0;
    background: linear-gradient(90deg, rgba(255, 248, 234, 0.22), rgba(74, 45, 26, 0.9));
    transform: skewY(5deg);
    transform-origin: left;
}

.book-cover img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}

.book-cover figcaption {
    position: absolute;
    right: 0.7rem;
    bottom: -2.2rem;
    left: 0.7rem;
    color: rgba(255, 248, 234, 0.72);
    font-size: 0.78rem;
    font-weight: 700;
    text-align: center;
}

.book-cover-primary {
    right: 2rem;
    bottom: 1.4rem;
    width: min(42vw, 250px);
    height: min(63vw, 386px);
    transform: rotate(6deg);
}

.book-cover-secondary {
    right: min(24vw, 245px);
    bottom: 2.2rem;
    width: min(34vw, 205px);
    height: min(51vw, 308px);
    transform: rotate(-8deg);
}

.signal-strip {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    border: 1px solid rgba(240, 211, 141, 0.2);
    border-radius: 999px;
    background: rgba(255, 248, 234, 0.045);
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.18);
}

.signal-strip span {
    padding: 0.45rem 0.8rem;
    color: rgba(255, 248, 234, 0.76);
    font-family: var(--font-primary);
    font-size: 0.86rem;
    font-weight: 750;
}

.section-intro {
    max-width: 760px;
    margin: clamp(5rem, 9vw, 8rem) auto 2.4rem;
    text-align: center;
}

.section-intro.compact {
    margin: 0 auto 2.4rem;
}

.section-intro h2,
.split-copy h2,
.reader-section h2,
.workflow-section h2,
.pricing-section h2,
.final-cta h2 {
    margin: 0;
    font-size: clamp(2.25rem, 4.4vw, 4.35rem);
    line-height: 1.07;
}

.section-intro p:not(.eyebrow),
.split-copy p,
.pricing-section p,
.final-cta p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.85;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.platform-grid {
    counter-reset: platform-card;
}

.platform-grid .feature-card {
    position: relative;
    overflow: hidden;
}

.platform-grid .feature-card::after {
    counter-increment: platform-card;
    content: "0" counter(platform-card);
    position: absolute;
    right: 1.15rem;
    bottom: 0.9rem;
    color: rgba(240, 211, 141, 0.11);
    font-family: var(--font-display);
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 700;
    line-height: 1;
}

.editorial-card,
.reader-panels article,
.workflow article {
    border: 1px solid rgba(255, 248, 234, 0.13);
    background:
        linear-gradient(145deg, rgba(255, 248, 234, 0.08), rgba(255, 248, 234, 0.035)),
        rgba(17, 16, 14, 0.72);
    box-shadow: 0 22px 70px rgba(0, 0, 0, 0.2);
}

.feature-card {
    min-height: 295px;
    padding: clamp(1.2rem, 2.4vw, 1.7rem);
    border-radius: 24px;
    transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(240, 211, 141, 0.38);
    background:
        linear-gradient(145deg, rgba(255, 248, 234, 0.11), rgba(255, 248, 234, 0.05)),
        rgba(17, 16, 14, 0.82);
}

.feature-kicker {
    display: inline-flex;
    margin-bottom: 1rem;
    padding: 0.42rem 0.7rem;
    border: 1px solid rgba(215, 173, 91, 0.3);
    border-radius: 999px;
    color: var(--gold-soft);
    background: rgba(215, 173, 91, 0.08);
    font-family: var(--font-primary);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.feature-card h3,
.reader-panels h3,
.workflow h3 {
    margin: 0 0 0.8rem;
    color: var(--paper);
    font-family: var(--font-display);
    font-size: clamp(1.45rem, 2.2vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.018em;
    line-height: 1.18;
}

.feature-card p,
.reader-panels p,
.workflow p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.03rem;
    line-height: 1.68;
}

.split-section {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: center;
    margin-top: clamp(5rem, 9vw, 8rem);
    padding: clamp(1rem, 3vw, 2rem);
    border: 1px solid rgba(240, 211, 141, 0.18);
    border-radius: 34px;
    background:
        linear-gradient(120deg, rgba(100, 43, 51, 0.28), transparent 42%),
        rgba(255, 248, 234, 0.045);
}

.showcase-section {
    background:
        radial-gradient(circle at 82% 18%, rgba(215, 173, 91, 0.16), transparent 18rem),
        linear-gradient(120deg, rgba(255, 248, 234, 0.055), rgba(100, 43, 51, 0.24));
}

.split-media {
    position: relative;
    overflow: hidden;
    min-height: 520px;
    border: 1px solid rgba(255, 248, 234, 0.12);
    border-radius: 28px;
    background: #211812;
    box-shadow: var(--shadow);
}

.split-media img {
    width: 100%;
    height: 520px;
    object-fit: cover;
}

.split-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 36% 34%, transparent, rgba(13, 11, 9, 0.28) 45%, rgba(13, 11, 9, 0.72)),
        linear-gradient(to top, rgba(13, 11, 9, 0.88), transparent 55%);
}

.desk-note {
    position: absolute;
    right: 1.2rem;
    bottom: 1.2rem;
    left: 1.2rem;
    z-index: 2;
    padding: 1rem;
    border: 1px solid rgba(255, 248, 234, 0.14);
    border-radius: 18px;
    background: rgba(13, 11, 9, 0.68);
}

.desk-note span {
    display: block;
    margin-bottom: 0.2rem;
    color: var(--gold-soft);
    font-family: var(--font-primary);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.desk-note strong {
    color: var(--paper);
    font-family: var(--font-primary);
    font-size: 0.92rem;
}

.split-copy {
    padding: clamp(0.5rem, 2vw, 1.5rem);
}

.check-list {
    display: grid;
    gap: 0.85rem;
    margin: 1.4rem 0 1.6rem;
    padding: 0;
    list-style: none;
}

.check-list li {
    position: relative;
    padding-left: 2rem;
    color: rgba(255, 248, 234, 0.78);
    font-size: 1.05rem;
    line-height: 1.62;
}

.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    display: inline-grid;
    width: 1.3rem;
    height: 1.3rem;
    place-items: center;
    border-radius: 50%;
    background: rgba(215, 173, 91, 0.18);
    color: var(--gold-soft);
    font-size: 0.8rem;
    font-weight: 900;
}

.ac-link {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--gold-soft);
    font-family: var(--font-primary);
    font-weight: 850;
}

.ac-link::after {
    content: "→";
    transition: transform 0.2s ease;
}

.ac-link:hover {
    color: var(--paper);
}

.ac-link:hover::after {
    transform: translateX(0.28rem);
}

.presentation-stack {
    position: relative;
    min-height: 540px;
}

.presentation-room {
    position: absolute;
    inset: 1.2rem 0 auto 1rem;
    width: calc(100% - 1rem);
    height: 380px;
    object-fit: cover;
    border: 1px solid rgba(255, 248, 234, 0.13);
    border-radius: 30px;
    box-shadow: var(--shadow);
}

.presentation-stack::after {
    content: "";
    position: absolute;
    inset: 1.2rem 0 auto 1rem;
    height: 380px;
    border-radius: 30px;
    background:
        linear-gradient(to top, rgba(13, 11, 9, 0.82), transparent 58%),
        linear-gradient(135deg, rgba(215, 173, 91, 0.16), transparent 45%);
}

.presentation-book {
    position: absolute;
    z-index: 2;
    margin: 0;
    filter: drop-shadow(0 28px 38px rgba(0, 0, 0, 0.48));
}

.presentation-book img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: 1px solid rgba(255, 248, 234, 0.18);
    border-radius: 12px;
}

.presentation-book-one,
.presentation-book-1 {
    right: 2rem;
    bottom: 1rem;
    width: min(46%, 220px);
    transform: rotate(7deg);
}

.presentation-book-two,
.presentation-book-2 {
    left: 2.5rem;
    bottom: 3rem;
    width: min(38%, 178px);
    transform: rotate(-8deg);
}

.reader-section {
    margin-top: clamp(5rem, 9vw, 8rem);
    padding: clamp(2rem, 5vw, 4rem);
    border-radius: 34px;
    background:
        linear-gradient(rgba(13, 11, 9, 0.62), rgba(13, 11, 9, 0.82)),
        url("/3D-Book/assets/library/library-03-entry.avif") center/cover;
    border: 1px solid rgba(240, 211, 141, 0.2);
    box-shadow: var(--shadow);
}

.reader-panels {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.reader-panels article {
    min-height: 230px;
    padding: 1.4rem;
    border-radius: 24px;
    backdrop-filter: blur(12px);
}

.reader-panels span,
.workflow span {
    display: inline-grid;
    width: 2.6rem;
    height: 2.6rem;
    margin-bottom: 1.25rem;
    place-items: center;
    border: 1px solid rgba(240, 211, 141, 0.28);
    border-radius: 50%;
    color: var(--gold-soft);
    font-family: var(--font-display);
    font-size: 1.15rem;
}

.workflow-section {
    margin-top: clamp(5rem, 9vw, 8rem);
    text-align: center;
}

.workflow {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2.2rem;
    text-align: left;
}

.workflow article {
    position: relative;
    min-height: 230px;
    padding: 1.35rem;
    border-radius: 24px;
}

.workflow article::after {
    content: "";
    position: absolute;
    top: 2.65rem;
    right: -1rem;
    width: 1rem;
    height: 1px;
    background: rgba(240, 211, 141, 0.4);
}

.workflow article:last-child::after {
    display: none;
}

.pricing-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    margin-top: clamp(5rem, 9vw, 8rem);
    padding: clamp(1.5rem, 4vw, 3rem);
    border: 1px solid rgba(240, 211, 141, 0.22);
    border-radius: 30px;
    background:
        radial-gradient(circle at 8% 12%, rgba(215, 173, 91, 0.15), transparent 22rem),
        linear-gradient(135deg, rgba(255, 248, 234, 0.09), rgba(255, 248, 234, 0.035));
}

.pricing-section div {
    max-width: 760px;
}

.final-cta {
    max-width: 900px;
    margin: clamp(5rem, 9vw, 8rem) auto 0;
    padding: clamp(2rem, 6vw, 5rem);
    border: 1px solid rgba(240, 211, 141, 0.24);
    border-radius: 36px;
    background:
        linear-gradient(135deg, rgba(100, 43, 51, 0.34), rgba(215, 173, 91, 0.12)),
        rgba(255, 248, 234, 0.05);
    text-align: center;
    box-shadow: var(--shadow);
}

.final-cta .hero-actions {
    justify-content: center;
}

/* Footer */
footer {
    margin-top: clamp(5rem, 9vw, 8rem);
    padding: 4rem 0 2rem;
    background:
        linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.28)),
        rgba(13, 11, 9, 0.76);
    border-top: 1px solid rgba(255, 248, 234, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr repeat(3, 1fr);
    gap: 2rem;
    width: min(1180px, calc(100vw - 40px));
    margin: 0 auto 2.2rem;
}

.footer-section h4 {
    margin: 0 0 1rem;
    color: var(--gold-soft);
    font-family: var(--font-display);
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.footer-section ul {
    display: grid;
    gap: 0.55rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-section a {
    color: rgba(255, 248, 234, 0.68);
}

.footer-section a:hover {
    color: var(--paper);
}

.footer-bottom {
    width: min(1180px, calc(100vw - 40px));
    margin: 0 auto;
    padding-top: 1.6rem;
    border-top: 1px solid rgba(255, 248, 234, 0.1);
    color: rgba(255, 248, 234, 0.5);
    font-size: 0.92rem;
}

.footer-bottom p {
    margin: 0;
}

/* Simple inner-page support for pages that reuse the public header/footer. */
main.container {
    padding-top: clamp(3rem, 6vw, 5rem);
    padding-bottom: 2rem;
}

main.container h1,
main.container h2 {
    color: var(--paper);
    font-family: var(--font-display);
}

main.container ul {
    padding-left: 1.25rem;
}

/* Responsive */
@media (max-width: 1060px) {
    .landing-hero,
    .split-section {
        grid-template-columns: 1fr;
    }

    .landing-hero {
        min-height: auto;
    }

    .hero-copy {
        max-width: 760px;
    }

    .landing-hero h1 {
        max-width: 16ch;
    }

    .hero-showcase {
        min-height: auto;
    }

    .platform-preview-panel {
        margin-right: auto;
        margin-left: 0;
    }

    .presentation-stack {
        min-height: 520px;
    }

    .feature-grid,
    .reader-panels {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .workflow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .workflow article::after {
        display: none;
    }

    .footer-content {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 820px) {
    nav {
        width: min(100% - 28px, 1180px);
        min-height: 68px;
        justify-content: flex-end;
    }

    .site-brand-float {
        top: 0.45rem;
        left: 14px;
        gap: 0;
    }

    .site-brand-seal {
        width: 4.75rem;
        height: 4.75rem;
    }

    .site-brand-float > span:not(.site-brand-seal) {
        display: none;
    }

    .mobile-menu-toggle {
        display: inline-block;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 1px);
        right: 14px;
        left: 14px;
        display: none;
        padding: 1rem;
        border: 1px solid rgba(255, 248, 234, 0.14);
        border-radius: 0 0 22px 22px;
        background: rgba(13, 11, 9, 0.96);
        box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4);
    }

    .nav-links.active {
        display: grid;
        gap: 0.5rem;
    }

    .nav-links a {
        width: 100%;
        justify-content: center;
        padding: 0.9rem 1rem;
        text-align: center;
    }

    .nav-links a:not(.btn-primary, .btn-secondary)::after {
        display: none;
    }

    .landing-page {
        width: min(100% - 28px, 1180px);
    }

    .landing-hero {
        padding-top: 1.4rem;
    }

    .hero-stats,
    .feature-grid,
    .reader-panels,
    .workflow {
        grid-template-columns: 1fr;
    }

    .hero-showcase {
        min-height: auto;
    }

    .platform-preview-grid {
        grid-template-columns: 1fr;
    }

    .library-card {
        inset: 0;
        min-height: 390px;
    }

    .library-card img {
        height: 390px;
    }

    .featured-books {
        height: 300px;
    }

    .book-cover-primary {
        right: 1rem;
        width: 175px;
        height: 270px;
    }

    .book-cover-secondary {
        right: 145px;
        width: 145px;
        height: 218px;
    }

    .signal-strip {
        border-radius: 22px;
    }

    .split-media,
    .split-media img {
        min-height: 380px;
        height: 380px;
    }

    .presentation-stack {
        min-height: 430px;
    }

    .presentation-room,
    .presentation-stack::after {
        inset: 0;
        width: 100%;
        height: 320px;
    }

    .presentation-book-one,
    .presentation-book-1 {
        right: 1rem;
        width: 155px;
    }

    .presentation-book-two,
    .presentation-book-2 {
        left: 1rem;
        width: 128px;
    }

    .pricing-section {
        display: grid;
    }

    .pricing-section .ac-btn {
        width: 100%;
    }

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

@media (max-width: 520px) {
    .landing-hero h1 {
        font-size: clamp(2.85rem, 13vw, 4rem);
        line-height: 1.04;
    }

    .hero-actions .ac-btn {
        width: 100%;
    }

    .library-card-caption {
        right: 0.85rem;
        bottom: 0.85rem;
        left: 0.85rem;
    }

    .platform-preview-panel h2 {
        max-width: 15ch;
        font-size: clamp(1.95rem, 10vw, 2.75rem);
    }

    .platform-preview-grid article {
        min-height: auto;
    }

    .book-cover-primary {
        right: 0.2rem;
        width: 145px;
        height: 224px;
    }

    .book-cover-secondary {
        right: 116px;
        width: 122px;
        height: 183px;
    }

    .presentation-stack {
        min-height: 370px;
    }

    .presentation-room,
    .presentation-stack::after {
        height: 260px;
        border-radius: 22px;
    }

    .presentation-book-one,
    .presentation-book-1 {
        right: 0.2rem;
        bottom: 1.2rem;
        width: 126px;
    }

    .presentation-book-two,
    .presentation-book-2 {
        left: 0.6rem;
        bottom: 2.2rem;
        width: 104px;
    }

    .feature-card,
    .reader-panels article,
    .workflow article {
        min-height: auto;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}