/* ========================================
   LE MONT BÉLIEN - STYLES
   ======================================== */

/* RESET & VARIABLES */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg-green: #5a6b52;
    --color-bg-dark: #3a4a35;
    --color-parchment: #d4c4a8;
    --color-parchment-light: #e8dcc4;
    --color-text: #3d3424;
    --color-gold: #c9a54d;
    --color-red: #b84c3c;
    --color-blue: #2c5a7c;
    --color-cream: #f5e6c8;
    --color-green-leaf: #4a6b45;
    
    --font-gothic: 'Uncial Antiqua', cursive;
    --font-body: 'EB Garamond', serif;
    
    --panel-left-width: clamp(280px, 25vw, 380px);
    --separator-width: 60px;
    --border-right-width: 70px;
    
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    height: 100vh;
    overflow: hidden;
    background: var(--color-bg-green);
}

/* ========================================
   LOADER
   ======================================== */
.loader {
    position: fixed;
    inset: 0;
    background: var(--color-bg-green);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s var(--transition-smooth),
                visibility 0.6s var(--transition-smooth);
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-heart {
    color: white;
    animation: heartbeat 1.2s ease-in-out infinite;
}

.loader-heart svg {
    width: 48px;
    height: 48px;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.15);
        opacity: 1;
    }
}

/* ========================================
   PROGRESS BAR
   ======================================== */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gold), var(--color-red));
    z-index: 1001;
    width: 0%;
    transition: width 0.1s ease;
}

@media (max-width: 768px) {
    .progress-bar {
        top: 60px;
    }
}

/* ========================================
   MOBILE HEADER
   ======================================== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-bg-dark);
    padding: 15px 20px;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.mobile-title {
    font-family: var(--font-gothic);
    font-size: 1.4rem;
    color: var(--color-cream);
    letter-spacing: 0.02em;
}

.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-cream);
    transition: all 0.3s var(--transition-smooth);
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   MOBILE NAVIGATION OVERLAY
   ======================================== */
.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg-green);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s var(--transition-smooth),
                visibility 0.4s var(--transition-smooth);
    overflow: hidden;
}

.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Bande horizontale en arrière-plan mobile */
.mobile-nav-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200%;
    z-index: 1;
    display: flex;
    justify-content: center;
    pointer-events: none;
}

.mobile-bg-band {
    width: 100%;
    height: auto;
    object-fit: cover;
    opacity: 0.7;
    transform: scale(0.6);
}

/* Menu de navigation mobile */
.mobile-nav {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 25px;
    position: relative;
    z-index: 10;
}

.mobile-nav .chapter-link {
    display: block;
    font-family: var(--font-gothic);
    font-size: 1.8rem;
    color: var(--color-cream);
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s var(--transition-smooth),
                color 0.3s ease;
}

.mobile-nav .chapter-link:hover {
    color: var(--color-gold);
}

.mobile-nav .chapter-link.active {
    color: var(--color-gold);
}

.mobile-nav-overlay.active .chapter-link {
    opacity: 1;
    transform: translateY(0);
}

.mobile-nav-overlay.active .chapter-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-nav-overlay.active .chapter-link:nth-child(2) { transition-delay: 0.15s; }
.mobile-nav-overlay.active .chapter-link:nth-child(3) { transition-delay: 0.2s; }
.mobile-nav-overlay.active .chapter-link:nth-child(4) { transition-delay: 0.25s; }

/* Ornement gothique en bas du menu mobile */
.mobile-ornament {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 5;
    display: flex;
    justify-content: center;
    pointer-events: none;
}

.mobile-ornament-image {
    width: 100%;
    max-width: 100vw;
    height: auto;
    object-fit: contain;
    object-position: bottom center;
}

/* ========================================
   MAIN LAYOUT
   ======================================== */
.layout {
    display: flex;
    height: 100vh;
}

/* ========================================
   PANNEAU GAUCHE
   ======================================== */
.panel-left {
    width: var(--panel-left-width);
    background: var(--color-bg-green);
    position: relative;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

/* Bande horizontale en arrière-plan */
.panel-left-bg {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 30%;
    z-index: 1;
    display: flex;
    justify-content: center;
    transform: translateY(50%);
}

.bg-horizontal-band {
    width: 180%;
    max-width: none;
    height: auto;
    object-fit: cover;
    opacity: 0.85;
    transform: scale(0.7);
}

.panel-left-content {
    padding: 3rem 2rem;
    position: relative;
    z-index: 10;
}

.site-title {
    font-family: var(--font-gothic);
    font-size: clamp(1.8rem, 2.5vw, 2.8rem);
    color: var(--color-cream);
    margin-bottom: 3rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    opacity: 0;
    animation: fadeInDown 0.8s var(--transition-smooth) 0.5s forwards;
}

/* ========================================
   MENU NAVIGATION
   ======================================== */
.menu {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.menu button {
    font-family: var(--font-gothic);
    font-size: clamp(1.1rem, 1.5vw, 1.4rem);
    color: var(--color-cream);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.3s var(--transition-smooth);
    position: relative;
    padding-left: 0;
}

.menu button::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: width 0.3s var(--transition-smooth);
}

.menu button:hover {
    color: var(--color-gold);
    padding-left: 20px;
}

.menu button:hover::before {
    width: 15px;
}

.menu button.active {
    color: var(--color-gold);
}

/* Animation d'entrée échelonnée */
.menu button:nth-child(1) { animation: fadeInLeft 0.5s var(--transition-smooth) 0.7s forwards; }
.menu button:nth-child(2) { animation: fadeInLeft 0.5s var(--transition-smooth) 0.85s forwards; }
.menu button:nth-child(3) { animation: fadeInLeft 0.5s var(--transition-smooth) 1s forwards; }
.menu button:nth-child(4) { animation: fadeInLeft 0.5s var(--transition-smooth) 1.15s forwards; }

/* ========================================
   BOUTON ÉCRIRE
   ======================================== */
.auth-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0;
    animation: fadeInUp 0.5s var(--transition-smooth) 1.3s forwards;
}

.btn-write {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 1.5rem;
    background: var(--color-gold);
    color: var(--color-bg-dark);
    text-decoration: none;
    font-family: var(--font-gothic);
    font-size: 1rem;
    border-radius: 8px;
    transition: all 0.3s var(--transition-smooth);
    border: 2px solid var(--color-gold);
}

.btn-write:hover {
    background: transparent;
    color: var(--color-gold);
    transform: translateY(-2px);
}

.btn-write .btn-icon {
    font-size: 1.2rem;
}

/* Lien écrire dans le menu mobile */
.mobile-nav .write-link {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-gold) !important;
    text-decoration: none;
}

.mobile-write-link {
    display: block;
    margin-top: 2rem;
    padding: 1rem 2rem;
    background: var(--color-gold);
    color: var(--color-bg-dark) !important;
    text-decoration: none;
    font-family: var(--font-gothic);
    font-size: 1.2rem;
    border-radius: 8px;
    text-align: center;
    position: relative;
    z-index: 10;
}

/* Statut du poète dans le menu */
.poet-status {
    display: block;
    font-family: var(--font-body);
    font-size: 0.75rem;
    opacity: 0.7;
    margin-top: 2px;
}

.menu-loading,
.menu-empty {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    font-style: italic;
    padding: 1rem 0;
}

/* ========================================
   NAVIGATION ENTRE POÈMES
   ======================================== */
.poem-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-gold);
}

.poem-nav-btn {
    font-family: var(--font-body);
    font-size: 0.95rem;
    padding: 0.6rem 1.2rem;
    background: var(--color-bg-green);
    color: var(--color-cream);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.poem-nav-btn:hover:not(:disabled) {
    background: var(--color-gold);
    color: var(--color-bg-dark);
}

.poem-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.poem-nav-count {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text);
}

/* ========================================
   ÉTATS VIDES
   ======================================== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
}

.poet-status-display {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-gold);
    font-style: italic;
    margin-bottom: 2rem;
}

.empty-message {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.empty-cta {
    font-family: var(--font-body);
    font-size: 1rem;
    color: #666;
    margin-bottom: 2rem;
}

.btn-write-large {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--color-red);
    color: var(--color-cream);
    text-decoration: none;
    font-family: var(--font-gothic);
    font-size: 1.1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-write-large:hover {
    background: #9a3f32;
    transform: translateY(-2px);
}

/* ========================================
   ORNEMENTS
   ======================================== */
.ornament-image-container {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: auto;
    max-height: 70%;
    overflow: hidden;
    pointer-events: none;
    display: flex;
    justify-content: center;
    z-index: 20;
}

.ornament-image {
    width: 100%;
    height: auto;
    object-fit: contain;
    object-position: bottom center;
}

/* ========================================
   SÉPARATEUR VERTICAL
   ======================================== */
.separator {
    width: var(--separator-width);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    z-index: 5;
}

.separator-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 300%;
    background-image: url('../images/bande-verticale.webp');
    background-repeat: repeat-y;
    background-size: 100% auto;
    background-position: top center;
    will-change: transform;
    transition: transform 0.05s linear;
}

/* ========================================
   PANNEAU DROIT (CONTENU)
   ======================================== */
.panel-right {
    flex: 1;
    background: var(--color-parchment);
    background-image: 
        radial-gradient(ellipse at 20% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(0, 0, 0, 0.03) 0%, transparent 50%);
    overflow-y: auto;
    position: relative;
}

.text-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 4rem 3rem;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s var(--transition-smooth), 
                transform 0.3s var(--transition-smooth);
}

/* Animation d'entrée initiale */
.text-container.initial-load {
    animation: fadeInUp 0.8s var(--transition-smooth) 0.8s forwards;
    opacity: 0;
}

/* ========================================
   TYPOGRAPHIE DU TEXTE
   ======================================== */
.chapter-title {
    font-family: var(--font-gothic);
    font-size: clamp(1.4rem, 2vw, 1.8rem);
    color: var(--color-text);
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
    letter-spacing: 0.03em;
}

.chapter-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
    margin: 1rem auto 0;
}

.chapter-text {
    font-size: clamp(1rem, 1.15vw, 1.15rem);
    line-height: 1.85;
    color: var(--color-text);
}

.chapter-text p {
    margin-bottom: 1.5em;
    text-align: justify;
}

/* ========================================
   BORDURE DROITE
   ======================================== */
.border-right {
    width: var(--border-right-width);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.border-right-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 300%;
    background-image: url('../images/bande-verticale.webp');
    background-repeat: repeat-y;
    background-size: 100% auto;
    background-position: top center;
    will-change: transform;
    transition: transform 0.05s linear;
}

/* ========================================
   BORDURE HORIZONTALE EN BAS
   ======================================== */
.border-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    overflow: hidden;
    height: 80px;
    pointer-events: none;
}

.border-bottom-image {
    width: 200%;
    height: 100%;
    object-fit: cover;
    object-position: left center;
    animation: scrollHorizontal 30s linear infinite;
}

@keyframes scrollHorizontal {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-25px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-25px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animation de transition du texte */
.text-fade-out {
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.3s var(--transition-smooth);
}

.text-fade-in {
    animation: textReveal 0.5s var(--transition-smooth) forwards;
}

@keyframes textReveal {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   RESPONSIVE - TABLETTE
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --panel-left-width: 260px;
        --separator-width: 50px;
        --border-right-width: 60px;
    }
    
    .text-container {
        padding: 3rem 2.5rem;
    }
}

/* ========================================
   RESPONSIVE - MOBILE
   ======================================== */
@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }
    
    .mobile-nav-overlay {
        display: flex;
    }
    
    .panel-left,
    .separator {
        display: none;
    }
    
    .layout {
        flex-direction: column;
    }
    
    .panel-right {
        height: 100vh;
        padding-top: 60px;
    }
    
    .text-container {
        padding: 2rem 1.5rem;
        max-width: 100%;
    }
    
    .chapter-title {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .chapter-text {
        font-size: 1rem;
        line-height: 1.75;
    }
}

/* ========================================
   SCROLLBAR PERSONNALISÉE
   ======================================== */
.panel-right::-webkit-scrollbar {
    width: 8px;
}

.panel-right::-webkit-scrollbar-track {
    background: var(--color-parchment);
}

.panel-right::-webkit-scrollbar-thumb {
    background: var(--color-gold);
    border-radius: 4px;
}

.panel-right::-webkit-scrollbar-thumb:hover {
    background: var(--color-red);
}

/* Firefox */
.panel-right {
    scrollbar-width: thin;
    scrollbar-color: var(--color-gold) var(--color-parchment);
}

/* ========================================
   EFFETS SUPPLÉMENTAIRES
   ======================================== */

/* Effet de survol sur le séparateur */
.separator:hover .separator-svg {
    animation-play-state: paused;
}

/* Ombre interne pour le parchemin */
.panel-right::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.05), transparent);
    pointer-events: none;
    z-index: 1;
}

/* Focus states pour accessibilité */
.menu button:focus-visible,
.menu-toggle:focus-visible,
.mobile-nav .chapter-link:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 4px;
}