/* ─────────────────────────────────────────
   css/style.css — Styles globaux partagés
   Portfolio Nedj Belloum
───────────────────────────────────────── */

/* ── VARIABLES ── */
:root {
  --bg: #000000;
  --bg2: #0a0a0a;
  --bg3: #111111;
  --bg4: #1a1a1a;
  --card: #161616;
  --card-hover: #1e1e1e;
  --border: rgba(255,255,255,0.08);
  --border2: rgba(255,255,255,0.12);
  --text: #f5f5f7;
  --text2: #a1a1a6;
  --text3: #6e6e73;
  --accent: #2997ff;
  --accent2: #30d158;
  --accent3: #ff375f;
  --nav-bg: rgba(0,0,0,0.72);
  --shadow: 0 20px 60px rgba(0,0,0,0.5);
  --font: -apple-system, 'SF Pro Display', 'Inter', BlinkMacSystemFont, sans-serif;
}

[data-theme="light"] {
  --bg: #f5f5f7;
  --bg2: #ffffff;
  --bg3: #f0f0f3;
  --bg4: #e8e8ed;
  --card: #ffffff;
  --card-hover: #f9f9fb;
  --border: rgba(0,0,0,0.06);
  --border2: rgba(0,0,0,0.1);
  --text: #1d1d1f;
  --text2: #6e6e73;
  --text3: #a1a1a6;
  --accent: #0071e3;
  --accent2: #1d8348;
  --accent3: #d70015;
  --nav-bg: rgba(245,245,247,0.82);
  --shadow: 0 20px 60px rgba(0,0,0,0.08);
}

/* ── RESET ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: var(--nav-bg);
  border-bottom: none;
  transition: all 0.3s ease;
}
.nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 22px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}
.nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--text2);
  text-decoration: none;
  transition: color 0.2s;
  letter-spacing: -0.1px;
  position: relative;
  padding-bottom: 2px;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active {
  color: var(--text);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0; right: 0;
  height: 1.5px;
  background: var(--accent);
  border-radius: 2px;
}
.theme-toggle {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border2);
  background: var(--bg4);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}
.theme-toggle:hover { background: var(--card-hover); border-color: var(--border2); }
.theme-toggle svg { width: 16px; height: 16px; fill: var(--text2); transition: fill 0.2s; }
.hamburger {
  width: 32px; height: 32px;
  border: none; background: none; cursor: pointer;
  display: none; flex-direction: column;
  align-items: center; justify-content: center; gap: 5px;
}
.hamburger span {
  width: 18px; height: 1.5px;
  background: var(--text2); border-radius: 2px;
  transition: all 0.3s;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 48px; left: 0; right: 0;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: none;
  padding: 16px 22px;
  flex-direction: column;
  gap: 4px;
  z-index: 999;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  color: var(--text2);
  text-decoration: none;
  font-size: 15px;
  padding: 10px 0;
  border-bottom: none;
  transition: color 0.2s;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: var(--text); }
.mobile-nav a.active { color: var(--accent); }

/* ── PAGE HEADER (hero de page) ── */
.page-hero {
  padding: 120px 22px 60px;
  max-width: 980px;
  margin: 0 auto;
}
.page-hero-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(41,151,255,0.1);
  border: 1px solid rgba(41,151,255,0.2);
  border-radius: 20px;
  padding: 6px 14px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.page-hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: -2.5px;
  color: var(--text);
  line-height: 1.05;
  margin-bottom: 16px;
}
.page-hero p {
  font-size: 18px;
  font-weight: 300;
  color: var(--text2);
  max-width: 560px;
  line-height: 1.6;
}

/* ── SECTIONS ── */
section {
  max-width: 980px;
  margin: 0 auto;
  padding: 80px 22px;
}
.section-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -2px;
  color: var(--text);
  line-height: 1.05;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 18px;
  font-weight: 300;
  color: var(--text2);
  max-width: 600px;
  line-height: 1.6;
  margin-bottom: 52px;
}
.divider {
  display: none;
}

/* ── BOUTONS ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 14px 28px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.25s;
  border: none; cursor: pointer;
}
.btn-primary:hover { background: #1a87e8; transform: scale(1.03); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--bg4);
  color: var(--text);
  padding: 14px 28px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.25s;
  border: 1px solid var(--border2);
  cursor: pointer;
}
.btn-secondary:hover { background: var(--card-hover); transform: scale(1.03); }

/* ── CARDS COMMUNES ── */
.tech-pill {
  font-size: 11px;
  color: var(--text3);
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
}
.tag-network { background: rgba(41,151,255,0.1); color: var(--accent); }
.tag-web { background: rgba(48,209,88,0.1); color: var(--accent2); }
.tag-security { background: rgba(255,55,95,0.1); color: var(--accent3); }

/* ── FOOTER ── */
footer {
  border-top: none;
  padding: 36px 22px;
  text-align: center;
}
.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  font-size: 12px;
  color: var(--text3);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text2); }
.footer-copy {
  font-size: 12px;
  color: var(--text3);
  font-weight: 300;
}

/* ── BOUTON LINKEDIN NAV ── */
.nav-linkedin {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border2);
  background: var(--bg4);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--text2);
  font-size: 14px;
}
.nav-linkedin:hover {
  background: #0a66c2;
  border-color: #0a66c2;
  color: #fff;
}

/* ── SCROLL TO TOP ── */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border2);
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  color: var(--text2);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
}
.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.scroll-top:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-3px);
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .section-title { letter-spacing: -1.5px; }
  .page-hero h1 { letter-spacing: -1.5px; }
}

/* ── EFFET PARTICULES ── */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
  pointer-events: none;
}