@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(31, 41, 55, 0.5);
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --border: rgba(75, 85, 99, 0.3);
}

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

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
body::before {
    content: '';
    position: fixed;
    top: 60%;
    left: 50%;
    width: 80vw;
    height: 80vh;
    transform: translate(-50%, -50%);
    background-image: url('logo.png'); /* nom de ton image */
    background-size: contain;          /* image visible en entier */
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.15;                     /* transparence (0.05 = très léger, 0.3 = plus visible) */
    pointer-events: none;
    z-index: -2;                       /* derrière les étoiles */
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    opacity: 0.25;
    background-image: 
        radial-gradient(2px 2px at 10% 20%, white, transparent),
        radial-gradient(1px 1px at 25% 15%, white, transparent),
        radial-gradient(2px 2px at 40% 30%, white, transparent),
        radial-gradient(1px 1px at 55% 10%, white, transparent),
        radial-gradient(2px 2px at 70% 25%, white, transparent),
        radial-gradient(1px 1px at 85% 18%, white, transparent),
        radial-gradient(2px 2px at 15% 45%, white, transparent),
        radial-gradient(1px 1px at 30% 55%, white, transparent),
        radial-gradient(2px 2px at 50% 50%, white, transparent),
        radial-gradient(1px 1px at 65% 60%, white, transparent),
        radial-gradient(2px 2px at 80% 55%, white, transparent),
        radial-gradient(1px 1px at 90% 65%, white, transparent),
        radial-gradient(2px 2px at 20% 75%, white, transparent),
        radial-gradient(1px 1px at 35% 85%, white, transparent),
        radial-gradient(2px 2px at 60% 80%, white, transparent),
        radial-gradient(1px 1px at 75% 90%, white, transparent),
        radial-gradient(2px 2px at 5% 60%, white, transparent),
        radial-gradient(1px 1px at 95% 40%, white, transparent);
    background-size: 400px 400px;
    animation: twinkle 120s linear infinite;
}

@keyframes twinkle {
    0% { transform: translateY(0); opacity: 0.25; }
    50% { opacity: 0.15; }
    100% { transform: translateY(-400px); opacity: 0.25; }
}

/* Header */
header {
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 42px;
    height: 42px;
}

.logo-text h1 {
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.subtitle {
    font-size: 0.6875rem;
    color: var(--text-secondary);
    margin-top: 0.125rem;
}

.auth-buttons a {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s;
}

.auth-buttons a:hover {
    background: var(--accent);
    border-color: var(--accent);
}

/* Navigation */
nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    padding: 0 2rem;
}

nav a {
    padding: 0.875rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.15s;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    opacity: 0;
    transition: opacity 0.15s;
}

nav a:hover,
nav a.active {
    color: var(--text-primary);
}

nav a.active::after {
    opacity: 1;
}

/* Hero */
.hero {
    padding: 5rem 2rem 4rem;
    text-align: center;
}

.hero h2 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.25rem;
    letter-spacing: -0.03em;
}

.hero-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* Objectives */
.objectives {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    letter-spacing: -0.02em;
}

.objectives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.objective-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.75rem;
    transition: all 0.2s;
}

.objective-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
}

.objective-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.objective-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
}

.objective-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Features */
.features {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.2s;
}

.feature-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Contact */
.contact-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-section h2 {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
}

.contact-info {
    max-width: 560px;
    margin: 0 auto 3.5rem;
    text-align: center;
}

.contact-info p {
    margin: 0.75rem 0;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.contact-info strong {
    color: var(--text-primary);
}

.contact-info a {
    color: var(--accent);
    text-decoration: none;
}

.team-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2rem;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.team-member {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.75rem;
    text-align: center;
    transition: all 0.2s;
}

.team-member:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.team-member img {
    width: 220px;
    height: 220px;
    border-radius: 0.5rem;
    object-fit: cover;
    object-position: center top;  /* Pour cadrer sur le haut */
    margin-bottom: 1rem;
    border: 2px solid var(--border);
}}

.team-member h3 {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.375rem;
}

.team-member p {
    font-size: 1.125rem;
    font-weight: 600;
}

/* Auth */
.auth-container {
    max-width: 440px;
    margin: 4rem auto;
    padding: 0 2rem;
}

.auth-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    overflow: hidden;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.tab {
    flex: 1;
    padding: 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}

.tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    opacity: 0;
    transition: opacity 0.15s;
}

.tab.active {
    color: var(--text-primary);
}

.tab.active::after {
    opacity: 1;
}

.tab-content {
    display: none;
    padding: 2rem;
}

.tab-content.active {
    display: block;
}

.tab-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.75rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.15s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.btn-submit {
    width: 100%;
    padding: 0.75rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-submit:hover {
    background: var(--accent-hover);
}

.message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.8125rem;
    text-align: center;
}

.message.success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* Tutos */
.tutos-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tutos-section h2 {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
}

.welcome-message {
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.welcome-message span {
    color: var(--accent);
    font-weight: 600;
}

.tuto-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.tuto-item {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.75rem;
    margin-bottom: 1.25rem;
    transition: all 0.2s;
}

.tuto-item:hover {
    transform: translateX(4px);
    border-color: var(--accent);
}

.tuto-item h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
}

.tuto-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.access-denied {
    text-align: center;
    padding: 4rem 2rem;
    max-width: 560px;
    margin: 0 auto;
}

.access-denied-icon {
    font-size: 3.5rem;
    opacity: 0.2;
    margin-bottom: 1.5rem;
}

.access-denied h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.access-denied p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 1.75rem;
}

.btn-primary {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.15s;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 2.5rem 2rem;
    text-align: center;
    margin-top: 4rem;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    margin: 0.375rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .hero h2 {
        font-size: 2.25rem;
    }

    .section-title {
        font-size: 1.875rem;
    }

    .objectives-grid,
    .features-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
}