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

:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --button-bg: #f0f0f0;
    --button-text: #333333;
    --button-border: #cccccc;

    
    --dark-bg: #1a1a1a;
    --dark-text: #ffffff;
    --dark-button-bg: #333333;
    --dark-button-text: #ffffff;
    --dark-button-border: #555555;
    --dark-nav-link-bg: #3a3a3a;
    --dark-nav-link-border: #999999;
    --dark-nav-link-text: #ffffff;
}


@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: var(--dark-bg);
        --text-color: var(--dark-text);
        --button-bg: var(--dark-button-bg);
        --button-text: var(--dark-button-text);
        --button-border: var(--dark-button-border);
    }
}

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

.skip-links {
  position: absolute;
  left: 50%;
  transform: translateX(-50%) translateY(-100%);
  background: #000;
  color: #fff;
  padding: 8px 16px;
  z-index: 100;
  clip-path: inset(100%) ;
  transition: transform 0.2s ease-in-out, clip-path 0.2s ease-in-out;
}

.skip-links:focus-visible {
  transform: translateX(-50%) translateY(0);
  outline: 3px solid #4a90e2;
  outline-offset: 2px;
  clip-path: inset(0);
}

[data-theme="light"] {
    --bg-color: #ffffff;
    --text-color: #333333;
    --button-bg: #f0f0f0;
    --button-text: #333333;
    --button-border: #cccccc;
}


[data-theme="dark"] {
    --bg-color: var(--dark-bg);
    --text-color: var(--dark-text);
    --button-bg: var(--dark-button-bg);
    --button-text: var(--dark-button-text);
    --button-border: var(--dark-button-border);
}

[data-theme="dark"] .nav-link,
[data-theme="dark"] .nav-link:visited {
    background-color: var(--dark-nav-link-bg);
    border-color: var(--dark-nav-link-border);
    color: var(--dark-nav-link-text);
}



@media (prefers-color-scheme: dark) {
    .nav-link,
    .nav-link:visited {
        background-color: var(--dark-nav-link-bg);
        border-color: var(--dark-nav-link-border);
        color: var(--dark-nav-link-text);
    }
}



body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: Arial, sans-serif;
    min-height: 100vh;
    padding: 20px;
    transition: background-color 0.3s ease, color 0.3s ease;
}


header {
    margin-bottom: 20px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#group-theme ul,
#nav-site ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 15px;
}


nav li {
    display: inline;
}

li {
    list-style: none;
}



h3 {

    padding: 10px;
}

a {
    text-decoration: none;
}


.theme-btn,
.language-btn {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--button-border);
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 14px;
    min-width: 60px;
    transition: all 0.3s ease;
}


.theme-btn:empty,
.language-btn:empty {
    opacity: 0.7;
}

.theme-btn:hover,
.language-btn:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}


.theme-btn:focus,
.language-btn:focus {
    outline: 2px solid #007acc;
    outline-offset: 2px;
}


.nav-link {
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--button-border);
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 14px;
    display: inline-block;
    transition: all 0.3s ease;
    text-decoration: none;
}

.nav-link:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

.nav-link:focus {
    outline: 2px solid #007acc;
    outline-offset: 2px;
}





.section {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}




.section2 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
    justify-items: stretch;
    max-width: 1000px;
    margin: 0 auto;
    padding: 10px 20px;
}


.section2>h2 {
    grid-column: 1 / -1;
    margin-bottom: 10px;
    text-align: center;
}


.section2>div {
    border: 1px solid var(--button-border);
    border-radius: 12px;
    padding: 16px;
    background: var(--bg-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    height: auto;
    text-align: left;
    overflow-wrap: anywhere;
}

.section2 h3 {
    margin-bottom: 8px;
}

.section2 ul {
    padding-left: 0;
}

.section2 li+li {
    margin-top: 6px;
}



.section h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-align: center;
}

.section h2 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-align: center;
    opacity: 0.8;
    font-weight: normal;
}


.presentation-content {
    line-height: 1.6;
    font-size: 1.1rem;
}

.presentation-content p {
    margin-bottom: 20px;
    text-align: left;
}

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

/* Partie présentation projet */


.project-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid var(--button-border);
    border-radius: 10px;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.project-card + .project-card {
    margin-top: 20px;
}

.project-header {
    margin-bottom: 10px;
}

.project-name {
    font-size: 1.25rem;
}

.project-date {
    opacity: 0.7;
    font-size: 0.95rem;
    margin: 0 0 16px;
    text-align: left;
}

.project-desc {
    line-height: 1.6;
    margin: 10px 0 16px;
    text-align: left;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 0 0 16px;
}

.project-tags li {
    border: 1px solid var(--button-border);
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 0.9rem;
}

.project-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}



footer {
    text-align: center;
    padding: 20px;
    border-top: 1px solid var(--button-border);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s;
}

.contact-links a:hover {
    opacity: 0.7;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    nav {
        flex-direction: column;
        gap: 20px;
    }

    #nav-site li {
        display: block;

    }


    #group-theme ul {
        justify-content: center;
        gap: 10px;
    }

    #nav-site {
        width: 100%;
    }

    #nav-site ul {
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr;
        gap: 10px;
        width: 100%;
    }

    .theme-btn,
    .language-btn {
        padding: 8px 16px;
        font-size: 12px;
        min-width: 50px;
        width: 100%;
    }

    .project-actions .theme-btn {
        width: auto;
        flex: 1 1 auto;
    }

    .nav-link {
        padding: 8px 16px;
        font-size: 12px;
        min-width: 180px;
        text-align: center;
        display: block;
    }

    .section {
        padding: 20px 15px;
    }

    .section h1 {
        font-size: 2rem;
    }

    .section h2 {
        font-size: 1.3rem;
    }

    .section2 {
        grid-template-columns: 1fr;
        padding: 0 10px;
    }

    .section2>h2 {
        margin-bottom: 6px;
    }


    .presentation-content {
        font-size: 1rem;
    }
}

@media (min-width: 769px) and (max-width: 900px){
    nav{
        flex-direction: column;
    }

    .nav-link{
        min-width: 180px ;
        text-align: center;
    }

    #nav-site ul {
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr;
        padding: 15px;
    }

    

}