/* ============================================
   VARIABLES & RESET
   ============================================ */
:root {
    --container-width-desktop: 85%;
    --container-width-tablet: 92%;
    --container-width-mobile: 100%;
    --container-max-width: 1200px;
    --color-primary: #00796b;
    --color-primary-hover: #005a4f;
    --color-text: #1a2a3a;
    --color-bg: #f5f7fa;
    --color-border: #e2e8f0;
    --color-card-bg: #ffffff;
    --radius: 16px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    --transition: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0;
}

/* ============================================
   CONTENEUR PRINCIPAL
   ============================================ */
.app-container {
    width: var(--container-width-desktop);
    max-width: var(--container-max-width);
    margin: 16px auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0;
}

/* ============================================
   ÉLÉMENTS COMMUNS
   ============================================ */
.card {
    background: var(--color-card-bg);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
    width: 100%;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    width: 100%;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 24px;
    text-decoration: none;
    flex-shrink: 0;
    transition: transform var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-text h1 {
    color: var(--color-primary);
    font-size: 32px;
    font-weight: 700;
    line-height: 1.1;
}

.logo-text .subtitle {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 400;
}

/* ============================================
   BOUTON MENU
   ============================================ */
.menu-toggle {
    display: none;
    align-items: center;
    gap: 8px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 10px 16px;
    font-family: 'Roboto', sans-serif;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}

.menu-toggle:hover {
    background: var(--color-primary-hover);
    transform: scale(1.02);
}

.menu-toggle .menu-icon {
    font-size: 22px;
    line-height: 1;
}

.menu-toggle .menu-label {
    font-size: 14px;
}

.menu-toggle.open {
    background: var(--color-primary-hover);
}

/* ============================================
   NAVIGATION DESKTOP
   ============================================ */
.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.main-nav a {
    padding: 8px 16px;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    transition: all var(--transition);
    border: 1px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
    background: #e6f7f5;
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ============================================
   OVERLAY MENU MOBILE
   ============================================ */
.overlay-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
}

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

.nav-overlay {
    position: fixed;
    top: 0;
    left: -320px;
    width: 300px;
    max-width: 85%;
    height: 100%;
    background: var(--color-card-bg);
    z-index: 1000;
    transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
    overflow-y: auto;
    padding: 0;
}

.nav-overlay.open {
    left: 0;
}

.nav-overlay-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
    background: #f8fafc;
}

.nav-overlay-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
}

.nav-overlay-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--color-text);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all var(--transition);
    line-height: 1;
}

.nav-overlay-close:hover {
    background: var(--color-border);
    color: var(--color-primary);
}

.nav-overlay-list {
    list-style: none;
    padding: 8px 0;
    margin: 0;
}

.nav-overlay-list > li {
    border-bottom: 1px solid #f1f5f9;
}

.nav-overlay-list > li:last-child {
    border-bottom: none;
}

.nav-overlay-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    color: var(--color-text);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-overlay-list a:hover,
.nav-overlay-list a.active {
    background: #e6f7f5;
    color: var(--color-primary);
}

.nav-overlay-list a .submenu-arrow {
    font-size: 12px;
    color: #94a3b8;
    transition: transform var(--transition);
    margin-left: 8px;
}

.has-submenu.open > a .submenu-arrow {
    transform: rotate(180deg);
}

.sub-menu {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    background: #f8fafc;
    margin: 0;
    padding: 0;
}

.sub-menu.open {
    max-height: 500px;
}

.sub-menu li {
    border-bottom: 1px solid #eef2f6;
}

.sub-menu li:last-child {
    border-bottom: none;
}

.sub-menu a {
    padding: 12px 24px 12px 48px !important;
    font-size: 14px !important;
    font-weight: 400 !important;
}

.sub-menu a:hover {
    background: #e6f7f5;
    color: var(--color-primary);
}

/* ============================================
   BOUTONS DU SITE
   ============================================ */
.nav-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 6px;
    justify-content: center;
}

.nav-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 10px 14px;
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition);
    font-family: inherit;
    gap: 8px;
    width: auto;
    flex: 0 1 auto;
}

.nav-btn:hover {
    background: #e6f7f5;
    border-color: var(--color-primary);
    transform: translateX(4px);
}

.nav-btn .nav-name {
    font-weight: 500;
    font-size: 14px;
    white-space: nowrap;
}

.nav-btn .nav-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    min-height: 28px;
    border-radius: 50%;
    background: transparent;
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 700;
    transition: all var(--transition);
    border: 2px solid var(--color-primary);
    flex-shrink: 0;
}

.nav-btn:hover .nav-arrow {
    background: var(--color-primary);
    color: #fff;
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(0, 121, 107, 0.35);
}

.link-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 12px;
}

.link-button {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition);
    font-family: inherit;
    gap: 8px;
    width: auto;
    font-weight: 500;
    font-size: 14px;
}

.link-button:hover {
    background: #e6f7f5;
    border-color: var(--color-primary);
    transform: translateX(4px);
}

.link-button .link-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    min-height: 28px;
    border-radius: 50%;
    background: transparent;
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 700;
    transition: all var(--transition);
    border: 2px solid var(--color-primary);
    flex-shrink: 0;
}

.link-button:hover .link-arrow {
    background: var(--color-primary);
    color: #fff;
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(0, 121, 107, 0.35);
}

/* ============================================
   INTRO & TITRES
   ============================================ */
.intro {
    background-color: #e6f7f5;
    border-radius: 12px;
    padding: 16px;
    font-size: 14px;
    line-height: 1.6;
    text-align: justify;
}

.intro strong {
    color: var(--color-primary);
}

.intro + .intro {
    margin-top: 12px;
}

.intro p {
    margin-bottom: 6px;
}

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

.section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 16px;
    display: block;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--color-card-bg);
    border-radius: var(--radius);
    padding: 24px 20px;
    margin-top: auto;
    border: 1px solid var(--color-border);
    text-align: center;
    width: 100%;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-bg);
    color: var(--color-text);
    text-decoration: none;
    font-size: 20px;
    transition: all var(--transition);
    border: 1px solid var(--color-border);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-social .social-label {
    display: none;
}

.footer-legal {
    font-size: 11px;
    color: #94a3b8;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.footer-legal a {
    color: #94a3b8;
    text-decoration: none;
}

.footer-legal a:hover {
    color: var(--color-primary);
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* --- TABLETTES (768px - 1199px) --- */
@media (min-width: 768px) and (max-width: 1199px) {
    .app-container {
        width: var(--container-width-tablet);
        margin: 12px auto;
    }

    .card {
        padding: 18px;
        margin-bottom: 16px;
    }

    .site-footer {
        padding: 20px 18px;
    }

    .logo-text h1 {
        font-size: 28px;
    }

    .logo {
        width: 54px;
        height: 54px;
        font-size: 22px;
    }

    .main-nav a {
        padding: 6px 14px;
        font-size: 13px;
    }

    .menu-toggle {
        padding: 8px 14px;
        font-size: 14px;
    }

    .menu-toggle .menu-icon {
        font-size: 20px;
    }
}

/* --- SMARTPHONES (< 768px) --- */
@media (max-width: 767px) {
    .app-container {
        width: var(--container-width-mobile);
        margin: 0;
        padding: 8px;
    }

    body {
        padding: 0;
    }

    .card {
        padding: 14px;
        margin-bottom: 12px;
        border-radius: 12px;
    }

    .site-footer {
        padding: 16px 14px;
        border-radius: 12px;
    }

    /* Header mobile */
    .site-header {
        gap: 10px;
    }

    .logo {
        width: 48px;
        height: 48px;
        font-size: 18px;
        border-radius: 10px;
    }

    .logo-text h1 {
        font-size: 22px;
    }

    .logo-text .subtitle {
        font-size: 12px;
    }

    .menu-toggle {
        display: flex;
        padding: 8px 12px;
        font-size: 13px;
        border-radius: 8px;
    }

    .menu-toggle .menu-icon {
        font-size: 18px;
    }

    .menu-toggle .menu-label {
        font-size: 12px;
    }

    .main-nav {
        display: none;
    }

    /* Contenu mobile */
    .intro {
        font-size: 13px;
        padding: 14px;
    }

    .section-title {
        font-size: 19px;
    }

    .nav-btn {
        width: 100%;
        flex: 1 1 100%;
        padding: 8px 12px;
    }

    .nav-btn .nav-name {
        font-size: 13px;
        white-space: normal;
    }

    .nav-btn .nav-arrow {
        width: 24px;
        height: 24px;
        min-width: 24px;
        min-height: 24px;
        font-size: 12px;
    }

    .link-button {
        font-size: 13px;
        padding: 8px 12px;
        width: 100%;
    }

    .link-button .link-arrow {
        width: 24px;
        height: 24px;
        min-width: 24px;
        min-height: 24px;
        font-size: 12px;
    }

    /* Footer mobile */
    .footer-social a {
        width: 38px;
        height: 38px;
        font-size: 17px;
    }

    .footer-social {
        gap: 14px;
    }

    .footer-legal {
        font-size: 10px;
        padding-top: 12px;
    }

    /* Overlay mobile */
    .nav-overlay {
        width: 280px;
        max-width: 85%;
        left: -300px;
    }

    .nav-overlay-header {
        padding: 16px 20px;
    }

    .nav-overlay-list a {
        padding: 12px 20px;
        font-size: 14px;
    }

    .sub-menu a {
        padding: 10px 20px 10px 40px !important;
        font-size: 13px !important;
    }
}

/* --- TRÈS PETITS SMARTPHONES (< 400px) --- */
@media (max-width: 400px) {
    .app-container {
        padding: 4px;
    }

    .card {
        padding: 12px;
        margin-bottom: 8px;
        border-radius: 10px;
    }

    .logo-text h1 {
        font-size: 18px;
    }

    .logo-text .subtitle {
        font-size: 10px;
    }

    .logo {
        width: 40px;
        height: 40px;
        font-size: 15px;
        border-radius: 8px;
    }

    .menu-toggle {
        padding: 6px 10px;
        font-size: 12px;
    }

    .menu-toggle .menu-icon {
        font-size: 16px;
    }

    .menu-toggle .menu-label {
        font-size: 11px;
    }

    .intro {
        font-size: 12px;
        padding: 12px;
    }

    .section-title {
        font-size: 17px;
    }

    .site-footer {
        padding: 14px 12px;
    }

    .footer-social a {
        width: 34px;
        height: 34px;
        font-size: 15px;
    }

    .footer-social {
        gap: 10px;
    }
}

/* --- GRANDS ÉCRANS (> 1200px) --- */
@media (min-width: 1200px) {
    .app-container {
        width: var(--container-width-desktop);
        margin: 20px auto;
    }

    .card {
        padding: 28px;
        margin-bottom: 24px;
    }

    .site-footer {
        padding: 28px 24px;
    }
}