/* ============================================
   NAV.CSS — Barre de navigation unifiée

   Sources des modes :
   1. .site-header                 : nav fixe en haut, sur fond
   2. .site-header--over-hero      : transparente sur fond hero (home, page projet)
   3. .site-header.is-scrolled     : fond blanc + logo noir (au scroll)

   Breakpoint unique : 768px
   ============================================ */

/* === HEADER (base) === */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--color-bg, #FAFAF7);
    border-bottom: 1px solid transparent;
    transition: background-color 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.35s ease,
    box-shadow 0.35s ease;
}

.site-header-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    height: 64px;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

@media (min-width: 768px) {
    .site-header-inner {
        height: 72px;
        gap: var(--space-6);
    }
}

/* === LOGO === */
.site-header .logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    transition: opacity 0.2s ease;
}

.site-header .logo:hover {
    opacity: 0.75;
}

/* Logo image (version réelle utilisée actuellement) */
.site-logo-img {
    display: block;
    height: 38px;
    width: auto;
    object-fit: contain;
}

@media (min-width: 768px) {
    .site-logo-img {
        height: 44px;
    }
}

/* Ancien logo texte (gardé pour compatibilité) */
.site-header .logo-text {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    padding: 4px 10px;
    background-color: var(--color-black, #0A0A0A);
    color: var(--color-white, #FFFFFF);
    transition: background-color 0.35s ease, color 0.35s ease;
    white-space: nowrap;
}

.site-header .logo-accent {
    color: var(--color-accent, #E63A11);
}

@media (min-width: 768px) {
    .site-header .logo-text {
        font-size: 12px;
        padding: 5px 12px;
    }
}

/* === NAV LIENS (desktop) === */
.site-nav {
    display: none;
}

.site-nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
    padding: 0;
    margin: 0;
}

.site-nav-link {
    position: relative;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text, #0A0A0A);
    text-decoration: none;
    padding: 8px 0;
    transition: color 0.25s ease;
    white-space: nowrap;
}

.site-nav-link:hover,
.site-nav-link.is-active {
    color: var(--color-accent, #E63A11);
}

.site-nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background-color: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-nav-link:hover::after,
.site-nav-link.is-active::after {
    transform: scaleX(1);
    transform-origin: left;
}

@media (min-width: 768px) {
    .site-nav {
        display: block;
    }
    .site-nav-link {
        font-size: 12px;
    }
}

/* === MODE "TRANSPARENT AU-DESSUS DU HERO" === */
/* Appliqué initialement quand le header est .site-header--over-hero
   et qu'on n'a pas encore scrollé */
.site-header--over-hero:not(.is-scrolled) {
    background-color: transparent;
    border-bottom-color: transparent;
}

.site-header--over-hero:not(.is-scrolled) .site-nav-link {
    color: rgba(255, 255, 255, 0.92);
}

.site-header--over-hero:not(.is-scrolled) .site-nav-link:hover,
.site-header--over-hero:not(.is-scrolled) .site-nav-link.is-active {
    color: var(--color-white, #FFFFFF);
}

/* Léger dégradé pour la lisibilité du logo blanc */
.site-header--over-hero:not(.is-scrolled)::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0) 100%);
    pointer-events: none;
    z-index: -1;
}

/* === MODE "SCROLLED" (fond blanc + logo noir) === */
.site-header.is-scrolled {
    background-color: var(--color-bg, #FAFAF7);
    border-bottom-color: rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
}

.site-header.is-scrolled .site-nav-link {
    color: var(--color-text, #0A0A0A);
}

.site-header.is-scrolled .site-nav-link:hover,
.site-header.is-scrolled .site-nav-link.is-active {
    color: var(--color-accent, #E63A11);
}

/* === BURGER (mobile uniquement) === */
.site-burger {
    position: relative;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1101;
    flex-shrink: 0;
}

.site-burger span {
    position: absolute;
    left: 6px;
    right: 6px;
    height: 2px;
    background-color: var(--color-text, #0A0A0A);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    opacity 0.2s ease,
    top 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    background-color 0.25s ease;
    transform-origin: center;
}

.site-burger span:nth-child(1) { top: 11px; }
.site-burger span:nth-child(2) { top: 15px; }
.site-burger span:nth-child(3) { top: 19px; }

.site-burger.is-active span:nth-child(1) {
    top: 15px;
    transform: rotate(45deg);
}
.site-burger.is-active span:nth-child(2) {
    opacity: 0;
}
.site-burger.is-active span:nth-child(3) {
    top: 15px;
    transform: rotate(-45deg);
}

/* Couleur du burger selon le mode */
.site-header--over-hero:not(.is-scrolled) .site-burger span {
    background-color: var(--color-white, #FFFFFF);
}

.site-header.is-scrolled .site-burger span {
    background-color: var(--color-text, #0A0A0A);
}

/* Quand le menu mobile est ouvert : croix toujours blanche */
.site-burger.is-active span {
    background-color: var(--color-white, #FFFFFF) !important;
}

/* Burger : visible uniquement <768px */
@media (min-width: 768px) {
    .site-burger {
        display: none;
    }
}

/* === LOGO COLORATION SELON MODE === */
/* Mode over-hero : logo en blanc inversé */
.site-header--over-hero:not(.is-scrolled) .logo-text {
    background-color: var(--color-white, #FFFFFF);
    color: var(--color-black, #0A0A0A);
}

/* === RESERVE D'ESPACE POUR LE HEADER FIXED === */
/* À utiliser sur le body des pages SANS hero
   (pour éviter que le contenu passe sous le header) */
body.has-header-spacer {
    padding-top: 64px;
}

@media (min-width: 768px) {
    body.has-header-spacer {
        padding-top: 72px;
    }
}

/* ============================================
   MOBILE NAV (overlay plein écran)
   ============================================ */
.mobile-nav {
    position: fixed !important;
    inset: 0 !important;
    z-index: 1100 !important;
    background-color: var(--color-black, #0A0A0A);
    display: flex !important;
    flex-direction: column;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    visibility: hidden !important;
    clip-path: circle(0% at calc(100% - 36px) 36px);
    transition: clip-path 0.6s cubic-bezier(0.77, 0, 0.175, 1),
    opacity 0.3s ease,
    visibility 0s linear 0.6s;
}

.mobile-nav.is-open {
    pointer-events: auto;
    opacity: 1;
    visibility: visible !important;
    clip-path: circle(150% at calc(100% - 36px) 36px);
    transition: clip-path 0.6s cubic-bezier(0.77, 0, 0.175, 1),
    opacity 0.3s ease,
    visibility 0s linear 0s;
}

/* Desktop : mobile-nav cachée pour toujours */
@media (min-width: 768px) {
    .mobile-nav {
        display: none !important;
        visibility: hidden !important;
    }
}

.mobile-nav-inner {
    padding: 100px var(--space-6) var(--space-8);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.mobile-nav-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: calc(0.2s + var(--i, 0) * 0.08s);
}

.mobile-nav.is-open .mobile-nav-item {
    opacity: 1;
    transform: translateY(0);
}

.mobile-nav-link {
    display: block;
    font-size: clamp(2rem, 7vw, 3.5rem);
    font-weight: 500;
    color: var(--color-white, #FFFFFF);
    text-decoration: none;
    letter-spacing: -0.02em;
    line-height: 1.05;
    padding: var(--space-2) 0;
    position: relative;
    transition: color 0.3s ease, padding-left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-nav-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-accent, #E63A11);
    transform: translateY(-50%);
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-nav-link:hover,
.mobile-nav-link:focus {
    color: var(--color-accent, #E63A11);
    padding-left: 28px;
}

.mobile-nav-link:hover::before,
.mobile-nav-link:focus::before {
    width: 18px;
}

.mobile-nav-footer {
    opacity: 0;
    transition: opacity 0.5s ease 0.6s;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-4);
}

.mobile-nav.is-open .mobile-nav-footer {
    opacity: 1;
}

.mobile-nav-tagline {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.4);
    margin: 0;
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
    .mobile-nav {
        clip-path: none;
        transition: opacity 0.2s ease, visibility 0s linear 0.2s;
    }
    .mobile-nav.is-open {
        clip-path: none;
        transition: opacity 0.2s ease, visibility 0s linear 0s;
    }
    .mobile-nav-item {
        transition: opacity 0.2s ease;
        transform: none;
        transition-delay: 0s;
    }
    .site-header,
    .site-nav-link,
    .site-burger span {
        transition: none !important;
    }
}