/* ============================================
   ÉDITIONS KILETON — Feuille de style principale
   ============================================ */

/* --- VARIABLES CSS --- */
:root {
    /* Palette Accueil — Paradis / Septième Ciel */
    --gold: #D4AF37;
    --gold-light: #E8D48B;
    --white-luminous: #FAFAFA;
    --sky-blue: #87CEEB;
    --deep-blue: #1B3A5C;

    /* Palette Livre — Vertige / Architectural */
    --night-blue: #0A1628;
    --architect-blue: #1B3A5C;
    --pure-white: #FFFFFF;

    /* Neutres */
    --text-dark: #1C2526;
    --text-medium: #4A5568;
    --text-light: #8896A6;
    --border-light: rgba(212, 175, 55, 0.2);

    /* Typographies */
    --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Espacements */
    --section-padding: 5rem 0;
    --container-max: 1200px;
    --container-narrow: 800px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--white-luminous);
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

/* --- CONTAINER --- */
.container {
    width: 90%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1rem;
}

.container-narrow {
    max-width: var(--container-narrow);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background-color 0.4s ease, box-shadow 0.4s ease;
}

.site-header.scrolled {
    background-color: rgba(27, 58, 92, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 1rem 2rem;
}

.logo-link {
    display: flex;
    align-items: center;
    z-index: 1001;
}

.logo {
    height: 36px;
    width: auto;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pure-white);
    opacity: 0.8;
    transition: opacity 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gold);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--pure-white);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   HERO — ACCUEIL (Paradis)
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-home {
    background: linear-gradient(
        180deg,
        var(--deep-blue) 0%,
        #2A5B8C 30%,
        #5B9BD5 60%,
        var(--sky-blue) 80%,
        var(--white-luminous) 100%
    );
}

.hero-home::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 2;
    padding: 2rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
    text-shadow: 0 2px 30px rgba(212, 175, 55, 0.3);
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    font-style: italic;
    color: var(--pure-white);
    opacity: 0.9;
    letter-spacing: 0.05em;
}

/* ============================================
   HERO — LIVRE (Vertige)
   ============================================ */
.page-book {
    background-color: var(--night-blue);
    color: var(--pure-white);
}

.hero-book {
    background: radial-gradient(
        ellipse at center 40%,
        rgba(212, 175, 55, 0.08) 0%,
        var(--night-blue) 60%
    );
    min-height: 100vh;
    padding-top: 80px;
}

.hero-book-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 2rem;
}

.hero-book-cover {
    flex-shrink: 0;
    perspective: 1000px;
}

.cover-3d {
    max-width: 320px;
    border-radius: 4px;
    box-shadow:
        0 25px 60px rgba(0, 0, 0, 0.5),
        0 0 40px rgba(212, 175, 55, 0.1);
    transform: rotateY(-5deg);
    transition: transform 0.6s ease;
}

.cover-3d:hover {
    transform: rotateY(0deg) scale(1.02);
}

.hero-book-text {
    max-width: 500px;
}

.book-label {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 0.75rem;
}

.hero-book-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--pure-white);
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.hero-book-author {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    letter-spacing: 0.05em;
}

.hero-book-quote {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--gold-light);
    line-height: 1.6;
    border-left: 2px solid var(--gold);
    padding-left: 1.25rem;
}

/* ============================================
   SECTIONS — COMMUN
   ============================================ */
.section {
    padding: var(--section-padding);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.03em;
    margin-bottom: 0.75rem;
}

.page-home .section-title {
    color: var(--deep-blue);
}

.page-book .section-title {
    color: var(--pure-white);
}

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

/* --- Fade-in animation --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ============================================
   SECTION — NOTRE VISION
   ============================================ */
.section-vision {
    background: var(--white-luminous);
}

.vision-text {
    max-width: 720px;
    margin: 0 auto;
    text-align: justify;
}

.vision-text p {
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
}

.vision-text p:last-child {
    margin-bottom: 0;
}

/* ============================================
   SECTION — L'AUTEUR
   ============================================ */
.section-author {
    background: linear-gradient(180deg, var(--white-luminous) 0%, #F0F4F8 100%);
}

.author-card {
    display: flex;
    align-items: center;
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.author-photo-wrapper {
    flex-shrink: 0;
}

.author-photo {
    width: 220px;
    height: 220px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--gold);
    box-shadow: 0 10px 40px rgba(27, 58, 92, 0.15);
}

.author-name {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--deep-blue);
    margin-bottom: 0.25rem;
}

.author-role {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 1.25rem;
}

.author-bio {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-medium);
    text-align: justify;
}

/* ============================================
   SECTION — CATALOGUE
   ============================================ */
.section-catalog {
    background: var(--white-luminous);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.book-card {
    display: flex;
    flex-direction: column;
    background: var(--pure-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(27, 58, 92, 0.08);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.book-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(27, 58, 92, 0.15);
}

.book-cover-wrapper {
    overflow: hidden;
    aspect-ratio: 7/10;
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.book-card:hover .book-cover {
    transform: scale(1.03);
}

.book-info {
    padding: 1.5rem;
    text-align: center;
}

.book-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--deep-blue);
    margin-bottom: 0.5rem;
}

.book-tagline {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-style: italic;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.book-cta {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gold);
    transition: letter-spacing 0.3s ease;
}

.book-card:hover .book-cta {
    letter-spacing: 0.15em;
}

/* ============================================
   SECTION — CONTACT
   ============================================ */
.section-contact {
    background: linear-gradient(180deg, #F0F4F8 0%, var(--white-luminous) 100%);
}

.contact-items {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.05rem;
    color: var(--deep-blue);
    transition: color 0.3s ease;
}

.contact-item:hover {
    color: var(--gold);
}

.contact-icon {
    color: var(--gold);
    flex-shrink: 0;
}

/* ============================================
   SECTION — VIDÉO (Livre)
   ============================================ */
.section-video {
    padding: 3rem 0;
}

.video-wrapper {
    max-width: 800px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.video-wrapper video {
    width: 100%;
    display: block;
}

/* ============================================
   SECTION — SYNOPSIS (Livre)
   ============================================ */
.section-synopsis {
    background: var(--night-blue);
}

.synopsis-text {
    max-width: 700px;
    margin: 0 auto;
    text-align: justify;
}

.synopsis-text p {
    font-size: 1.05rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1.5rem;
}

.synopsis-text em {
    color: var(--gold-light);
    font-style: italic;
}

/* ============================================
   SECTION — CLIP VIDÉO / BANDE-ANNONCE (Livre)
   ============================================ */
.section-clip {
    background: var(--night-blue);
    padding: 4rem 0;
}

.clip-subtitle {
    text-align: center;
    color: var(--text-light);
    font-family: var(--font-sans);
    font-size: 1.05rem;
    font-weight: 300;
    margin-bottom: 2rem;
    letter-spacing: 0.02em;
}

.clip-wrapper {
    max-width: 960px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(212, 175, 55, 0.15);
}

.clip-responsive {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
}

.clip-responsive iframe {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border: 0 !important;
}

/* ============================================
   SECTION — EXTRAIT (Livre)
   ============================================ */
.section-excerpt {
    background: linear-gradient(180deg, var(--night-blue) 0%, #0D1F38 100%);
}

.excerpt-box {
    text-align: center;
    padding: 3rem;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
}

.excerpt-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--pure-white);
    margin-bottom: 1rem;
}

.excerpt-desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
    font-size: 1rem;
}

/* --- Boutons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-gold {
    background: var(--gold);
    color: var(--night-blue);
}

.btn-gold:hover {
    background: var(--gold-light);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.4);
    transform: translateY(-2px);
}

.btn-download svg {
    flex-shrink: 0;
}

/* ============================================
   SECTION — ACHETER (Livre)
   ============================================ */
.section-buy {
    background: linear-gradient(180deg, var(--night-blue) 0%, #0D1F38 100%);
    padding-bottom: 4rem;
}

.buy-box {
    text-align: center;
    padding: 3rem;
}

.buy-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--pure-white);
    margin-bottom: 2rem;
}

.btn-buy {
    display: inline-block;
    padding: 1rem 3rem;
    background: var(--gold);
    color: var(--night-blue);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.btn-buy:hover {
    background: var(--gold-light);
    box-shadow: 0 6px 30px rgba(212, 175, 55, 0.4);
    transform: translateY(-2px);
}

.buy-note {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 1rem;
    font-style: italic;
}

.buy-alt {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 1.5rem;
}

.buy-alt a {
    color: var(--gold);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.buy-alt a:hover {
    color: var(--gold-light);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border-light);
}

.page-home .site-footer {
    background: var(--white-luminous);
}

.page-book .site-footer {
    background: #060E1A;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    font-size: 0.8rem;
    color: var(--text-light);
}

.footer-nav {
    display: flex;
    gap: 1.5rem;
}

.footer-nav a {
    font-size: 0.8rem;
    color: var(--text-light);
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--gold);
}

/* ============================================
   RESPONSIVE — MOBILE FIRST
   ============================================ */

/* Mobile (< 768px) */
@media (max-width: 767px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        background: rgba(10, 22, 40, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        transition: right 0.4s ease;
        padding: 2rem;
    }

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

    .nav-link {
        font-size: 1rem;
    }

    /* Hero Accueil */
    .hero-title {
        font-size: 2.5rem;
    }

    /* Hero Livre */
    .hero-book-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
        padding-top: 2rem;
    }

    .cover-3d {
        max-width: 240px;
        transform: none;
    }

    .hero-book-quote {
        text-align: left;
    }

    /* Auteur */
    .author-card {
        flex-direction: column;
        text-align: center;
    }

    .author-bio {
        text-align: left;
    }

    /* Couvertures */
    .covers-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
    }

    /* Contact */
    .contact-items {
        flex-direction: column;
        align-items: center;
    }

    /* Footer */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    /* Excerpt box */
    .excerpt-box {
        padding: 2rem 1.5rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.8rem;
    }
}

/* Tablet (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    .hero-book-content {
        gap: 3rem;
    }

    .cover-3d {
        max-width: 260px;
    }

    .author-photo {
        width: 180px;
        height: 180px;
    }
}

/* Desktop large (1440px+) */
@media (min-width: 1440px) {
    .container {
        max-width: 1300px;
    }

    .hero-title {
        font-size: 5rem;
    }

    .section {
        padding: 6rem 0;
    }
}

/* ============================================
   FOCUS & ACCESSIBILITY
   ============================================ */
:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 3px;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 3px;
}

/* ── Ambient Audio Toggle ── */
.page-book #audio-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(10, 10, 10, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: rgba(255, 255, 255, 0.75);
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, transform 0.2s ease;
}
.page-book #audio-toggle:hover {
  background: rgba(30, 30, 30, 0.85);
  color: #ffffff;
  transform: scale(1.08);
}
.page-book #audio-toggle.is-muted {
  color: rgba(255, 255, 255, 0.35);
  border-color: rgba(255, 255, 255, 0.08);
}

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

    .fade-in {
        opacity: 1;
        transform: none;
    }

    .cover-3d {
        transform: none;
    }
}

/* ============================================================
   SECTION — ÉCOUTER LA BANDE-SON (livre.html #bande-son)
   ============================================================ */

.soundtrack-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
}

.soundtrack-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    max-width: 360px;
    padding: 0.85rem 1.25rem;
    background: rgba(27, 58, 92, 0.4);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 8px;
    color: var(--white-luminous);
    text-decoration: none;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 400;
    transition: background 0.3s ease, border-color 0.3s ease,
                transform 0.3s ease, box-shadow 0.3s ease;
}

.soundtrack-btn:hover {
    background: rgba(27, 58, 92, 0.7);
    border-color: var(--gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.15);
}

.soundtrack-btn:active  { transform: translateY(0); }

.soundtrack-btn:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}

.soundtrack-btn svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.track-title {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-weight: 400;
    font-size: clamp(1.05rem, 3.5vw, 1.25rem);
    color: var(--gold-light);
    text-align: center;
    margin: 0 0 0.75rem;
}

.track-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.track-block--spaced { margin-top: 1.5rem; }

@media (prefers-reduced-motion: reduce) {
    .soundtrack-btn { transition: none; }
    .soundtrack-btn:hover { transform: none; }
}