/* ----------------- Variables ----------------- */
:root {
    /* Couleurs */
    --color-bg: #0d0d0d;
    --color-bg-elev: #161616;
    --color-bg-card: #141414;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-strong: rgba(255, 255, 255, 0.16);
    --color-text: #f5f5f7;
    --color-text-muted: #a1a1a6;
    --color-text-dim: #6e6e73;
    --color-accent: #7c5cff;        /* violet électrique */
    --color-accent-hover: #957aff;

    /* Espacements */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 5rem;

    /* Rayons */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-pill: 999px;

    /* Ombres */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* Transitions */
    --transition: 0.2s ease;

    /* Layout */
    --max-width: 1200px;
    --section-padding: 80px;
}

/* ----------------- Reset / Base ----------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

img,
video,
svg {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-accent);
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

ul,
ol {
    list-style: none;
}

h1,
h2,
h3 {
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* ----------------- Layout helpers ----------------- */
.section {
    padding: var(--section-padding) var(--space-md);
    max-width: var(--max-width);
    margin: 0 auto;
}

.section__header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section__title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: var(--space-xs);
}

.section__subtitle {
    color: var(--color-text-muted);
    font-size: 1.05rem;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(13, 13, 13, 0.6);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    transition: background-color var(--transition), border-color var(--transition);
}

.navbar.is-scrolled {
    background-color: rgba(13, 13, 13, 0.85);
    border-bottom-color: var(--color-border);
}

.navbar__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar__logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-text);
}

.navbar__links {
    display: flex;
    gap: var(--space-lg);
}

.navbar__links a {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.navbar__links a:hover {
    color: var(--color-text);
}

.navbar__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.navbar__burger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition), opacity var(--transition);
}

.navbar__burger.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar__burger.is-open span:nth-child(2) {
    opacity: 0;
}

.navbar__burger.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px var(--space-md) var(--space-xl);
}

.hero__inner {
    text-align: center;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.hero__photo {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-border-strong);
    box-shadow: var(--shadow-md);
}

.hero__title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 700;
}

.hero__subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--color-accent);
    font-weight: 500;
}

.hero__description {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    max-width: 540px;
}

.hero__cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
    margin-top: var(--space-xs);
}

/* Badges techno */
.badge-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.badge {
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    background-color: var(--color-bg-elev);
    border: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Boutons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-pill);
    font-size: 0.95rem;
    font-weight: 500;
    transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.btn--primary {
    background-color: var(--color-accent);
    color: #fff;
}

.btn--primary:hover {
    background-color: var(--color-accent-hover);
    color: #fff;
    transform: translateY(-1px);
}

.btn--ghost {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border-strong);
}

.btn--ghost:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Liens sociaux */
.social-list {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.social-list a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    transition: color var(--transition), border-color var(--transition), transform var(--transition);
}

.social-list a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

/* ============================================================
   PROJETS
   ============================================================ */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.project-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition), transform var(--transition);
    display: flex;
    flex-direction: column;
}

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

.project-card__media {
    display: grid;
    place-items: center;
    min-height: 220px;
    padding: var(--space-md);
    color: var(--color-text-muted);
    text-align: center;
    background:
        linear-gradient(135deg, rgba(124, 92, 255, 0.16), transparent 60%),
        var(--color-bg-elev);
    border-bottom: 1px solid var(--color-border);
}

.project-card__video {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background-color: #000;
    border-bottom: 1px solid var(--color-border);
}

.project-card__poster {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background-color: var(--color-bg-elev);
    border-bottom: 1px solid var(--color-border);
}

.project-card__media-title {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
    font-weight: 600;
}

.project-card__body {
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

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

.project-card__desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    align-items: center;
}

.tech-list li {
    padding: 4px 8px;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    line-height: 1.2;
    background-color: var(--color-bg-elev);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
}

.project-card__toggle {
    align-self: flex-start;
}

.project-card__details {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    padding: var(--space-sm);
    background-color: var(--color-bg-elev);
    border-radius: var(--radius-sm);
    border-left: 2px solid var(--color-accent);
}

.project-card__actions {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: var(--space-xs);
}

.link-btn {
    color: var(--color-accent);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0;
    transition: color var(--transition);
}

.link-btn:hover {
    color: var(--color-accent-hover);
}

/* ============================================================
   PARCOURS TIMELINE
   ============================================================ */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    opacity: 0.4;
}

.timeline__item {
    position: relative;
    margin-bottom: var(--space-lg);
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--color-accent);
    box-shadow: 0 0 0 4px var(--color-bg), 0 0 12px var(--color-accent);
}

.timeline__content {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}

.timeline__year {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-xs);
}

.timeline__title {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.timeline__org {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
    font-weight: 500;
}

.timeline__desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ============================================================
   COMPETENCES
   ============================================================ */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.skill-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: border-color var(--transition), transform var(--transition);
}

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

.skill-card__title {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
    color: var(--color-accent);
}

.skill-card__list li {
    padding: 6px 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--color-border);
}

.skill-card__list li:last-child {
    border-bottom: none;
}

/* ============================================================
   CONTACT
   ============================================================ */
.section--contact .contact {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.contact__name {
    font-size: 1.5rem;
    font-weight: 600;
}

.contact__location {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    text-align: center;
    padding: var(--space-md);
    color: var(--color-text-dim);
    font-size: 0.85rem;
    border-top: 1px solid var(--color-border);
}

/* ============================================================
   RESPONSIVE TABLETTE / DESKTOP
   ============================================================ */
@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Timeline alternée centrée */
    .timeline {
        padding-left: 0;
    }

    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }

    .timeline__item {
        width: 50%;
        padding-right: var(--space-lg);
    }

    .timeline__item:nth-child(even) {
        margin-left: 50%;
        padding-right: 0;
        padding-left: var(--space-lg);
    }

    .timeline__item::before {
        left: auto;
        right: -7px;
    }

    .timeline__item:nth-child(even)::before {
        left: -7px;
        right: auto;
    }
}

@media (min-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================================
   RESPONSIVE MOBILE
   ============================================================ */
@media (max-width: 767px) {
    .navbar__burger {
        display: flex;
    }

    .navbar__links {
        position: fixed;
        top: 64px;
        right: 0;
        width: 70%;
        max-width: 320px;
        height: calc(100vh - 64px);
        background-color: rgba(13, 13, 13, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        gap: 0;
        padding: var(--space-lg) var(--space-md);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        border-left: 1px solid var(--color-border);
    }

    .navbar__links.is-open {
        transform: translateX(0);
    }

    .navbar__links:not(.is-open) {
        visibility: hidden;
    }

    .navbar__links li {
        padding: var(--space-sm) 0;
        border-bottom: 1px solid var(--color-border);
    }

    .navbar__links a {
        font-size: 1.05rem;
        color: var(--color-text);
    }

    .section {
        padding: 60px var(--space-sm);
    }

    .hero {
        padding: 100px var(--space-sm) 60px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms;
        transition-duration: 0.01ms;
        scroll-behavior: auto;
    }
}