/* ============================================================
   Mohamed Amrani — Portfolio
   Palette: data-flow dark. Type: Space Grotesk (display) /
   Inter (body) / IBM Plex Mono (technical tags, grounded in
   the subject — env tags, stack chips, timeline dates).
   ============================================================ */

:root{
  --bg:            #0A0E14;
  --bg-panel:      #10151F;
  --bg-panel-2:    #141B27;
  --line:          #212B3A;
  --line-soft:     #1A2230;
  --text:          #E7ECF2;
  --text-dim:      #8C99AC;
  --text-faint:    #5B6779;
  --accent:        #4FD1C5;
  --accent-dim:    #2E8F86;
  --accent-warm:   #F2A65A;
  --radius:        10px;
  --font-display:  'Space Grotesk', sans-serif;
  --font-body:     'Inter', sans-serif;
  --font-mono:     'IBM Plex Mono', monospace;
}

@media (prefers-color-scheme: light){
  :root{
    /* Design is intentionally dark (matches subject: monitoring/pipeline
       dashboards). We keep one dark theme rather than a washed-out light
       variant, but ensure contrast stays accessible either way. */
  }
}

*, *::before, *::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

a{ color: inherit; text-decoration: none; }
h1,h2,h3{ font-family: var(--font-display); font-weight: 600; margin: 0; color: var(--text); }
p{ margin: 0; }
ul,ol{ margin:0; padding:0; list-style:none; }

.wrap{
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* subtle background grid, evokes a monitoring canvas */
.grid-overlay{
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 85%);
}

/* ---------- header ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,14,20,0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height: 68px;
}
.brand{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}
.brand-dot{ color: var(--accent); }
.main-nav{ display:flex; align-items:center; gap: 28px; }
.main-nav a{
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color .15s ease;
}
.main-nav a:hover{ color: var(--text); }
.main-nav a.is-active:not(.nav-cta){ color: var(--accent); }
.nav-cta{
  border: 1px solid var(--line);
  padding: 8px 16px;
  border-radius: 999px;
  color: var(--text) !important;
}
.nav-cta:hover{ border-color: var(--accent-dim); }

/* ---------- hero ---------- */
.hero{
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding: 88px 24px 72px;
}
.kicker{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 18px;
}
.hero h1{
  font-size: clamp(2rem, 4vw, 2.85rem);
  line-height: 1.18;
  max-width: 16ch;
  letter-spacing: -0.01em;
}
.hero-lede{
  margin-top: 20px;
  max-width: 52ch;
  color: var(--text-dim);
  font-size: 1.04rem;
}
.hero-actions{
  display:flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.btn{
  display:inline-flex;
  align-items:center;
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.btn-primary{
  background: var(--accent);
  color: #061412;
  font-weight: 600;
}
.btn-primary:hover{ transform: translateY(-1px); }
.btn-ghost{
  border: 1px solid var(--line);
  color: var(--text);
}
.btn-ghost:hover{ border-color: var(--accent-dim); }

.hero-meta{
  margin-top: 40px;
  display:flex;
  gap: 36px;
  flex-wrap: wrap;
}
.hero-meta li{ display:flex; flex-direction:column; gap:4px; }
.meta-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: none;
}
.hero-meta a{ font-size: 0.92rem; color: var(--text-dim); }
.hero-meta a:hover{ color: var(--accent); }

/* ---------- hero flow diagram ---------- */
.hero-flow{ position: relative; }
.flow-svg{ width: 100%; height: auto; overflow: visible; }
.flow-lines path{
  fill: none;
  stroke: var(--line);
  stroke-width: 1.5;
}
.flow-nodes circle{
  fill: var(--bg-panel);
  stroke: var(--line);
  stroke-width: 1.5;
}
.flow-nodes .node-core circle{
  fill: var(--bg-panel-2);
  stroke: var(--accent);
  stroke-width: 2;
}
.flow-nodes .node-sink circle{
  stroke: var(--accent-warm);
}
.flow-nodes text{
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--text-dim);
  text-anchor: middle;
}
.flow-nodes .node-core text{ fill: var(--text); font-weight: 500; }
.flow-nodes text.small{ font-size: 10px; }

.flow-particles .p{
  fill: var(--accent);
  offset-distance: 0%;
  animation: travel 3.2s linear infinite;
}
.flow-particles .p2{ animation-delay: .6s; }
.flow-particles .p3{ animation-delay: 1.4s; fill: var(--accent-warm); }
.flow-particles .p4{ animation-delay: 2.0s; }
.flow-particles .p5{ animation-delay: 2.6s; fill: var(--accent-warm); }

@keyframes travel{
  0%   { offset-distance: 0%; opacity: 0; }
  8%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}

/* ---------- stats ---------- */
.stats{
  position: relative;
  z-index:1;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.stat{
  background: var(--bg);
  padding: 32px 24px;
  display:flex;
  flex-direction:column;
  gap: 8px;
}
.stat-num{
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--accent);
}
.stat-label{ font-size: 0.86rem; color: var(--text-dim); max-width: 22ch; }

/* ---------- section head ---------- */
.section-head{
  max-width: 60ch;
  margin-bottom: 44px;
}
.section-head h2{
  font-size: clamp(1.6rem, 2.6vw, 2rem);
}
.section-head p{
  margin-top: 12px;
  color: var(--text-dim);
  font-size: 1rem;
}

/* ---------- expertise ---------- */
.expertise{ position: relative; z-index:1; padding: 96px 24px 20px; }
.skill-groups{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px 32px;
}
.skill-group h3{
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
}
.chips{ display:flex; flex-wrap:wrap; gap: 8px; }
.chip{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--bg-panel);
}
.chip-core{
  color: var(--accent);
  border-color: var(--accent-dim);
}

/* ---------- timeline ---------- */
.timeline-section{ position: relative; z-index: 1; padding: 96px 24px; }
.timeline{
  position: relative;
  padding-left: 32px;
  border-left: 1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap: 56px;
}
.tl-item{ position: relative; }
.tl-marker{
  position: absolute;
  left: -37px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}
.tl-item:first-child .tl-marker{
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(79,209,197,0.15);
}
.tl-top{ display:flex; align-items:center; gap: 14px; margin-bottom: 10px; }
.tl-date{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
}
.tl-status{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 3px 9px;
  border-radius: 999px;
}
.tl-content h3{ font-size: 1.25rem; }
.tl-org{ color: var(--text-dim); margin-top: 4px; font-size: 0.95rem; }
.tl-points{
  margin-top: 18px;
  display:flex;
  flex-direction:column;
  gap: 10px;
  max-width: 68ch;
}
.tl-points li{
  position: relative;
  padding-left: 18px;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.tl-points li::before{
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1.5px;
  background: var(--text-faint);
}
.tl-tech{
  margin-top: 20px;
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
}
.tl-tech span{
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-faint);
  border: 1px solid var(--line-soft);
  padding: 4px 10px;
  border-radius: 5px;
}

/* ---------- formation ---------- */
.formation{ position: relative; z-index:1; padding: 40px 24px 96px; }
.formation-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.formation-card{
  background: var(--bg-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 22px;
  display:flex;
  flex-direction:column;
  gap: 10px;
}
.f-tag{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-warm);
}
.formation-card h3{ font-size: 1.02rem; line-height:1.3; }
.formation-card p{ color: var(--text-dim); font-size: 0.88rem; }

.languages{
  margin-top: 40px;
  display:flex;
  gap: 40px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line-soft);
  padding-top: 32px;
}
.lang{ display:flex; flex-direction:column; gap:6px; }
.lang-name{ font-family: var(--font-display); font-size: 1.05rem; }
.lang-level{ font-size: 0.85rem; color: var(--text-dim); }

/* ---------- contact ---------- */
.contact{ position: relative; z-index:1; padding: 40px 24px 120px; }
.contact-card{
  background: var(--bg-panel);
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  padding: 64px 48px;
  text-align: center;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap: 16px;
}
.contact-card h2{
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  max-width: 22ch;
}
.contact-card p{ color: var(--text-dim); max-width: 46ch; }
.contact-links{
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 20px;
}

/* ---------- footer ---------- */
.site-footer{
  position: relative;
  z-index: 1;
  display:flex;
  justify-content: space-between;
  padding: 28px 24px 40px;
  border-top: 1px solid var(--line-soft);
  color: var(--text-faint);
  font-size: 0.82rem;
}

/* ---------- focus ---------- */
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- responsive ---------- */
@media (max-width: 900px){
  .hero{ grid-template-columns: 1fr; padding-top: 56px; }
  .hero-flow{ order: -1; max-width: 420px; margin: 0 auto; }
  .stats{ grid-template-columns: repeat(2, 1fr); }
  .skill-groups{ grid-template-columns: repeat(2, 1fr); }
  .formation-grid{ grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px){
  .main-nav{ gap: 16px; }
  .main-nav a:not(.nav-cta){ display:none; }
  .hero{ padding: 44px 20px 56px; }
  .hero h1{ max-width: none; }
  .stats{ grid-template-columns: 1fr 1fr; }
  .skill-groups{ grid-template-columns: 1fr; }
  .formation-grid{ grid-template-columns: 1fr; }
  .contact-card{ padding: 40px 24px; }
  .site-footer{ flex-direction: column; gap: 6px; }
  .timeline{ padding-left: 24px; }
  .tl-marker{ left: -29px; }
}