/* ════════════════════════════════════════════════════════════════════
   CYBERFOLIO — Feuille de styles principale
   Auteur : Damien Dathueyt (Zyphang)
   ════════════════════════════════════════════════════════════════════

   Architecture du fichier :
   1. Variables CSS (couleurs, typo, espaces) — TOUT EST PERSONNALISABLE ICI
   2. Reset + base
   3. Accessibilité (focus, skip-link, prefers-reduced-motion)
   4. Layout général (container, sections)
   5. Header / navigation
   6. Sections (hero, skills, projects, certs, timeline, contact)
   7. Footer
   8. Responsive (tablette, mobile)
   ════════════════════════════════════════════════════════════════════ */


/* ════════════════════════════════════════════════════════════════════
   1. VARIABLES CSS — change les couleurs ICI pour rebrander tout le site
   ════════════════════════════════════════════════════════════════════ */
:root {
    /* === Palette "Corporate Cyber" : bleu profond + accent bleu vif === */
    --color-bg:           #0a1628;   /* Fond principal */
    --color-bg-alt:       #0d1c33;   /* Fond sections alternées */
    --color-bg-card:      rgba(15, 30, 55, 0.55);
    --color-bg-card-hover: rgba(20, 40, 70, 0.75);

    --color-border:       rgba(148, 163, 184, 0.15);
    --color-border-strong: rgba(148, 163, 184, 0.30);
    --color-border-accent: rgba(59, 130, 246, 0.35);

    --color-text:         #e2e8f0;   /* Corps de texte */
    --color-text-strong:  #f8fafc;   /* Titres */
    --color-text-muted:   #94a3b8;   /* Texte secondaire */
    --color-text-faint:   #64748b;   /* Footer, métadonnées */

    --color-accent:       #3b82f6;   /* Bleu vif — CTA, accents */
    --color-accent-soft:  #60a5fa;   /* Bleu plus doux — liens, tags */
    --color-accent-bg:    rgba(59, 130, 246, 0.15);

    --color-success:      #22c55e;
    --color-success-bg:   rgba(34, 197, 94, 0.30);
    --color-warning:      #f59e0b;
    --color-warning-bg:   rgba(245, 158, 11, 0.30);

    /* === Typographie === */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    /* === Tailles & espacements === */
    --max-width:     1100px;
    --radius-sm:     4px;
    --radius-md:     6px;
    --radius-lg:     10px;

    --space-xs:      0.5rem;
    --space-sm:      1rem;
    --space-md:      2rem;
    --space-lg:      4rem;
    --space-xl:      6rem;

    /* === Transitions === */
    --transition-fast: 150ms ease;
    --transition:      250ms ease;
}


/* ════════════════════════════════════════════════════════════════════
   2. RESET & BASE
   ════════════════════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    /* Fond avec une grille très subtile pour donner de la texture sans surcharger */
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.025) 1px, transparent 1px);
    background-size: 32px 32px;
    background-position: -1px -1px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

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

a { color: var(--color-accent-soft); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent); }

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

ul, ol { list-style: none; }

::selection { background: var(--color-accent); color: var(--color-bg); }


/* ════════════════════════════════════════════════════════════════════
   3. ACCESSIBILITÉ
   ════════════════════════════════════════════════════════════════════ */

/* Skip link : invisible jusqu'au focus clavier */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-sm);
    background: var(--color-accent);
    color: var(--color-bg);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    font-weight: 500;
    z-index: 100;
    transition: top var(--transition);
}
.skip-link:focus { top: var(--space-sm); }

/* Focus visible (WCAG 2.4.7) — uniquement au clavier */
:focus { outline: none; }
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* Respect des préférences utilisateur (mouvement réduit) */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Helper screen reader only */
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}


/* ════════════════════════════════════════════════════════════════════
   4. LAYOUT GÉNÉRAL
   ════════════════════════════════════════════════════════════════════ */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section { padding: var(--space-xl) 0; }
.section-alt { background: var(--color-bg-alt); }

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.12em;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 500;
    color: var(--color-text-strong);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

.section-intro {
    color: var(--color-text-muted);
    max-width: 640px;
    margin-bottom: var(--space-md);
    font-size: 0.95rem;
}


/* ════════════════════════════════════════════════════════════════════
   5. HEADER / NAVIGATION
   ════════════════════════════════════════════════════════════════════ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(10, 22, 40, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.9rem var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-strong);
}
.nav-logo:hover { color: var(--color-accent-soft); }
.nav-logo-icon { color: var(--color-accent); }

.nav-menu {
    display: flex;
    gap: 1.5rem;
}
.nav-menu a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 400;
    padding: 0.25rem 0;
    position: relative;
}
.nav-menu a:hover { color: var(--color-text-strong); }
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0; height: 1px;
    background: var(--color-accent);
    transition: width var(--transition);
}
.nav-menu a:hover::after { width: 100%; }

/* Bouton hamburger (mobile) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 36px; height: 36px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}
.nav-toggle span {
    display: block;
    width: 18px; height: 1.5px;
    background: var(--color-text);
    margin: 2px 0;
    transition: all var(--transition);
}


/* ════════════════════════════════════════════════════════════════════
   6. SECTIONS
   ════════════════════════════════════════════════════════════════════ */

/* ── 6.1 HERO ──────────────────────────────────────────────────────── */
.section-hero {
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
}

/* Effet de "scanlines" subtil dans le hero, façon terminal */
.section-hero::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg,
        transparent 0%,
        rgba(59, 130, 246, 0.02) 50%,
        transparent 100%);
    pointer-events: none;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 500;
    color: var(--color-text-strong);
    letter-spacing: -0.025em;
    margin-bottom: 0.25rem;
    line-height: 1.1;
}

.hero-pseudo {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}
.hero-pseudo span { color: var(--color-accent-soft); }

.hero-baseline {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--color-accent-soft);
    margin-bottom: var(--space-sm);
}
.prompt-marker { color: var(--color-text-muted); margin-right: 0.5rem; }
.cursor { color: var(--color-accent); animation: blink 1.1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-description {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text);
    max-width: 620px;
    margin-bottom: var(--space-md);
}
.hero-description strong {
    color: var(--color-text-strong);
    font-weight: 500;
    border-bottom: 1px solid var(--color-accent);
    padding-bottom: 1px;
}

.hero-cta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.125rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: #2563eb; color: #fff; transform: translateY(-1px); }
.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border-strong);
}
.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-soft);
    transform: translateY(-1px);
}
.btn svg { width: 14px; height: 14px; flex-shrink: 0; }

/* ── 6.2 SKILLS ────────────────────────────────────────────────────── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 0.875rem;
}

.skill-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: all var(--transition);
}
.skill-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.skill-card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.875rem;
}
.skill-card-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--color-accent-soft);
    flex-shrink: 0;
}
.skill-card-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent-soft);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skill-list { font-size: 0.875rem; line-height: 1.9; }
.skill-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
}
.skill-name { color: var(--color-text); }
.skill-level {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

/* ── 6.3 PROJECTS ──────────────────────────────────────────────────── */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 2px solid var(--color-accent);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    padding: 1.125rem 1.5rem;
    transition: all var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
}
.project-card:hover {
    border-left-width: 3px;
    background: var(--color-bg-card-hover);
    transform: translateX(2px);
    color: inherit;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.375rem;
    flex-wrap: wrap;
}
.project-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-strong);
    line-height: 1.3;
}
.project-year {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    flex-shrink: 0;
}
.project-description {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.65;
    margin-bottom: 0.625rem;
}
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}
.project-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.15rem 0.55rem;
    background: var(--color-accent-bg);
    color: var(--color-accent-soft);
    border-radius: var(--radius-sm);
}

/* ── 6.4 CERTIFICATIONS ────────────────────────────────────────────── */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
}

.cert-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-lg);
    padding: 1rem 1.125rem;
    transition: all var(--transition);
}
.cert-card.is-obtained { border-color: var(--color-success-bg); }
.cert-card.is-pending  { border-color: var(--color-warning-bg); border-style: dashed; }
.cert-card:hover { transform: translateY(-2px); }

.cert-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    margin-bottom: 0.375rem;
    letter-spacing: 0.05em;
}
.cert-status.is-obtained { color: var(--color-success); }
.cert-status.is-pending  { color: var(--color-warning); }

.cert-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-strong);
    margin-bottom: 0.125rem;
}
.cert-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ── 6.5 TIMELINE / EXPÉRIENCE ─────────────────────────────────────── */
.timeline {
    position: relative;
    padding-left: 1.25rem;
    border-left: 1px solid var(--color-border);
}

.timeline-item {
    position: relative;
    padding: 0.5rem 0 1.25rem 1.25rem;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
    content: '';
    position: absolute;
    left: -1.31rem;
    top: 0.95rem;
    width: 9px; height: 9px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 2px solid var(--color-bg);
}
.timeline-item.is-past::before {
    background: var(--color-text-muted);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    flex-wrap: wrap;
}
.timeline-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-strong);
}
.timeline-period {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}
.timeline-description {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.65;
    margin-top: 0.375rem;
}

/* ── 6.6 CONTACT ───────────────────────────────────────────────────── */
.contact-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    max-width: 580px;
}

.contact-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}
.contact-row:last-child { border-bottom: none; }

.contact-icon { color: var(--color-accent-soft); flex-shrink: 0; }
.contact-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    min-width: 70px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.contact-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text);
    flex: 1 1 auto;
    word-break: break-all;
}
.contact-link:hover { color: var(--color-accent); }

.contact-action {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent-soft);
    padding: 0.25rem 0.625rem;
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}
.contact-action:hover {
    background: var(--color-accent-bg);
    color: var(--color-accent);
}
.contact-action.is-copied {
    color: var(--color-success);
    border-color: var(--color-success-bg);
}


/* ════════════════════════════════════════════════════════════════════
   7. FOOTER
   ════════════════════════════════════════════════════════════════════ */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 1.25rem 0;
    margin-top: var(--space-md);
}
.footer-row {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-faint);
}


/* ════════════════════════════════════════════════════════════════════
   8. RESPONSIVE
   ════════════════════════════════════════════════════════════════════ */

/* Tablette (≤ 768px) */
@media (max-width: 768px) {
    .section { padding: var(--space-lg) 0; }
    .section-hero { padding-top: var(--space-md); }

    .nav-toggle { display: flex; }

    .nav-menu {
        position: absolute;
        top: 100%; left: 0; right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-sm) var(--space-md);
        transform: translateY(-110%);
        transition: transform var(--transition);
        z-index: 49;
    }
    .nav-menu.is-open { transform: translateY(0); }
    .nav-menu li { width: 100%; }
    .nav-menu a {
        display: block;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--color-border);
    }
    .nav-menu li:last-child a { border-bottom: none; }

    .skills-grid { grid-template-columns: 1fr; }
    .certs-grid  { grid-template-columns: 1fr; }

    .project-header { flex-direction: column; gap: 0.25rem; }
}

/* Mobile (≤ 480px) */
@media (max-width: 480px) {
    .container { padding: 0 var(--space-sm); }
    .nav { padding: 0.75rem var(--space-sm); }

    .hero-cta { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }

    .footer-row { flex-direction: column; align-items: flex-start; }
}

/* Animation d'apparition au scroll (déclenchée par main.js via IntersectionObserver) */
.fade-in {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms ease, transform 600ms ease;
}
.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}