/* ═══════════════════════════════════════════════════
   PORTFOLIO — ACHRAF BZI | BTS SIO SISR
   ═══════════════════════════════════════════════════ */

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

:root {
  --primary:    #6366f1;
  --primary-d:  #4f46e5;
  --accent:     #22d3ee;
  --bg:         #0a0b14;
  --bg-2:       #0f1120;
  --bg-card:    #141729;
  --bg-card-h:  #1a1f38;
  --border:     rgba(99,102,241,.18);
  --border-l:   rgba(99,102,241,.08);
  --text:       #e2e8f0;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --success:    #10b981;
  --radius:     12px;
  --radius-lg:  20px;
  --shadow:     0 4px 24px rgba(0,0,0,.4);
  --shadow-lg:  0 12px 48px rgba(0,0,0,.5);
  --font:       'Inter', sans-serif;
  --font-mono:  'JetBrains Mono', monospace;
  --nav-h:      68px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; font-size: 17px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection { background: var(--primary); color: #fff; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── SCROLLBAR ────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 99px; }

/* ── CONTAINER ────────────────────────────────────── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── BUTTONS ──────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(99,102,241,.35);
}
.btn-primary:hover {
  background: var(--primary-d);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99,102,241,.5);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }

.timeline-section-label {
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .12em;
  margin: 40px 0 20px 0;
  padding-left: 4px;
}
.timeline-dot--accent {
  background: var(--accent) !important;
  box-shadow: 0 0 0 3px rgba(34,211,238,.3) !important;
}
.timeline-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.timeline-list li {
  font-size: .875rem;
  color: var(--text-muted);
  padding-left: 18px;
  position: relative;
  line-height: 1.55;
}
.timeline-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* ── SECTION SHARED ───────────────────────────────── */
section { padding: 100px 0; }
section:nth-child(odd) { background: var(--bg); }
section:nth-child(even) { background: var(--bg-2); }

/* Pages séparées : padding-top pour compenser la navbar fixe */
.page-section {
  padding-top: calc(var(--nav-h) + 72px);
  min-height: calc(100vh - 100px);
  background: var(--bg) !important;
}

.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--primary);
  letter-spacing: .15em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.section-header h1 {
  font-size: clamp(2.6rem, 4vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -.03em;
  margin-bottom: 12px;
}

.veille-block {
  margin-bottom: 40px;
  padding: 28px;
  background: rgba(15, 18, 37, 0.96);
  border: 1px solid rgba(99,102,241,.12);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(0,0,0,.25);
}

.veille-block h3 {
  font-size: clamp(1.4rem, 2.3vw, 1.9rem);
  color: #fff;
  margin-bottom: 18px;
}

.veille-block p {
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.8;
}

.veille-block ul.veille-tools {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin: 16px 0 20px;
  padding: 0;
}

.veille-block ul.veille-tools li {
  position: relative;
  padding-left: 24px;
  color: var(--text);
  font-weight: 500;
}

.veille-block ul.veille-tools li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 1rem;
  line-height: 1;
}

.keyword-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.keyword-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(99,102,241,.12);
  border: 1px solid rgba(99,102,241,.18);
  color: #dbeafe;
  font-size: .95rem;
  font-weight: 500;
}

.veille-card {
  background: rgba(10, 13, 28, 0.82);
  border: 1px solid rgba(99,102,241,.16);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 16px;
}

.veille-card h4 {
  font-size: 1.05rem;
  margin-bottom: 12px;
  color: #fff;
}

.veille-card p {
  margin-bottom: 0;
  color: var(--text-light);
}

/* ── TAG ──────────────────────────────────────────── */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: .72rem;
  font-weight: 600;
  background: rgba(99,102,241,.15);
  color: var(--primary);
  border: 1px solid rgba(99,102,241,.25);
}

/* ═══════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(10,11,20,.7);
  border-bottom: 1px solid var(--border-l);
  transition: var(--transition);
}
#navbar.scrolled {
  background: rgba(10,11,20,.92);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow);
}
.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.02em;
}
.logo .dot { color: var(--primary); }
.nav-links {
  display: flex;
  gap: 8px;
}
.nav-links a {
  padding: 6px 16px;
  border-radius: 50px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  background: rgba(99,102,241,.15);
}
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ═══════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px 20px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .25;
}
.blob-1 {
  width: 600px; height: 600px;
  top: -150px; left: -200px;
  background: radial-gradient(circle, var(--primary), transparent 70%);
}
.blob-2 {
  width: 500px; height: 500px;
  bottom: -100px; right: -150px;
  background: radial-gradient(circle, var(--accent), transparent 70%);
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 760px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 50px;
  background: rgba(99,102,241,.12);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: 20px;
  animation: fadeInDown .6s ease both;
}
#hero h1 {
  font-size: clamp(2.8rem, 7vw, 4.2rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.05;
  letter-spacing: -.03em;
  margin-bottom: 8px;
  animation: fadeInUp .6s .1s ease both;
}
h1 .accent { color: var(--primary); }
.hero-sub {
  font-size: clamp(1.05rem, 2.3vw, 1.35rem);
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 12px;
  font-family: var(--font-mono);
  animation: fadeInUp .6s .2s ease both;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 24px;
  line-height: 1.6;
  animation: fadeInUp .6s .3s ease both;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
  animation: fadeInUp .6s .4s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  animation: fadeInUp .6s .5s ease both;
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.stat-label {
  font-size: .8rem;
  color: var(--text-muted);
  display: block;
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ═══════════════════════════════════════════════════
   ABOUT
   ═══════════════════════════════════════════════════ */
#about { background: var(--bg-2) !important; }
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}
.about-avatar { text-align: center; }
.avatar-frame {
  width: 200px;
  height: 200px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 0 0 6px rgba(99,102,241,.15), var(--shadow-lg);
  transition: var(--transition);
}
.avatar-frame:hover { transform: scale(1.03) rotate(1deg); }
.avatar-initials {
  font-size: 3.5rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.05em;
}
.about-socials {
  display: flex;
  gap: 12px;
  justify-content: center;
}
.about-socials a {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition);
}
.about-socials a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}
.about-text p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 1.02rem;
}
.about-text strong { color: var(--text); }
.about-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
}
.info-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.info-item > i {
  color: var(--primary);
  font-size: 1rem;
  margin-top: 3px;
  flex-shrink: 0;
}
.info-label {
  display: block;
  font-size: .75rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 2px;
}
.info-value {
  font-size: .9rem;
  color: var(--text);
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════
   SKILLS
   ═══════════════════════════════════════════════════ */
#skills { background: var(--bg) !important; }
.skills-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.skill-category:hover {
  border-color: rgba(99,102,241,.4);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}
.skill-cat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(99,102,241,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 16px;
}
.skill-category h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.skill-list { display: flex; flex-direction: column; gap: 14px; }
.skill-info {
  display: flex;
  justify-content: space-between;
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.skill-bar {
  height: 6px;
  background: rgba(255,255,255,.06);
  border-radius: 99px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 1.2s cubic-bezier(.4,0,.2,1);
}

/* Skill tags list (sans pourcentages) */
.skill-tags-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}
.skill-tags-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.4;
}
.lvl {
  flex-shrink: 0;
  display: inline-block;
  padding: 2px 10px;
  border-radius: 50px;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.lvl-high {
  background: rgba(99,102,241,.18);
  color: #a5b4fc;
  border: 1px solid rgba(99,102,241,.35);
}
.lvl-mid {
  background: rgba(34,211,238,.12);
  color: #67e8f9;
  border: 1px solid rgba(34,211,238,.3);
}
.lvl-low {
  background: rgba(148,163,184,.1);
  color: var(--text-light);
  border: 1px solid rgba(148,163,184,.2);
}

.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.badge-tech {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border-radius: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: .85rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
  cursor: default;
}
.badge-tech:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(99,102,241,.08);
}
.badge-tech i { font-size: .9rem; }

/* ═══════════════════════════════════════════════════
   PROJECTS
   ═══════════════════════════════════════════════════ */
#projects { background: var(--bg-2) !important; }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.project-card:hover {
  border-color: rgba(99,102,241,.4);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.project-card:hover::before { opacity: 1; }
.project-card.featured {
  border-color: rgba(99,102,241,.3);
  background: linear-gradient(145deg, var(--bg-card), rgba(99,102,241,.06));
  padding-top: 56px;
}
.project-badge {
  position: absolute;
  top: 16px; right: 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.project-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: rgba(99,102,241,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--primary);
  flex-shrink: 0;
}
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
.project-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  line-height: 1.4;
}
.project-card p {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}
.project-footer { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border-l); }
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}
.project-link:hover { gap: 10px; color: var(--accent); }

/* ═══════════════════════════════════════════════════
   TIMELINE (CERTIFICATIONS)
   ═══════════════════════════════════════════════════ */
#certifications { background: var(--bg) !important; }
.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 8px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), transparent);
}
.timeline-item {
  position: relative;
  margin-bottom: 36px;
}
.timeline-dot {
  position: absolute;
  left: -28px;
  top: 20px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 3px rgba(99,102,241,.3);
  z-index: 1;
}
.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  transition: var(--transition);
}
.timeline-card:hover {
  border-color: rgba(99,102,241,.4);
  transform: translateX(6px);
  box-shadow: var(--shadow);
}
.timeline-date {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: .05em;
}
.timeline-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.timeline-org {
  font-size: .85rem;
  color: var(--text-light);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.timeline-card > p:last-of-type {
  font-size: .875rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.timeline-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ═══════════════════════════════════════════════════
   CONTACT
   ═══════════════════════════════════════════════════ */
#contact { background: var(--bg-2) !important; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: start;
}
.contact-info > p {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.7;
  margin-bottom: 36px;
}
.contact-cards { display: flex; flex-direction: column; gap: 14px; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.contact-card:hover {
  border-color: var(--primary);
  transform: translateX(6px);
  background: var(--bg-card-h);
}
.contact-card > i {
  font-size: 1.1rem;
  color: var(--primary);
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}
.contact-label {
  display: block;
  font-size: .72rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.contact-value {
  font-size: .9rem;
  color: var(--text);
  font-weight: 500;
}

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-muted);
}
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: .9rem;
  transition: var(--transition);
  resize: none;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: rgba(99,102,241,.05);
  box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-light); }
.form-success {
  display: none;
  text-align: center;
  color: var(--success);
  font-size: .9rem;
  font-weight: 600;
  margin-top: 16px;
}
.form-success.show { display: block; }

/* ═══════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════ */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border-l);
  padding: 36px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
footer p { font-size: .9rem; color: var(--text-muted); }
footer strong { color: var(--primary); }
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  font-size: .85rem;
  color: var(--text-light);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--primary); }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: .85rem;
  transition: var(--transition);
}
.footer-socials a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ── BACK TO TOP ──────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  box-shadow: 0 4px 20px rgba(99,102,241,.4);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: var(--transition);
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}
.back-to-top:hover { background: var(--primary-d); transform: translateY(-2px); }

/* ═══════════════════════════════════════════════════
   EXPERIENCE
   ═══════════════════════════════════════════════════ */
#experience { background: var(--bg) !important; }

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-top: 12px;
}

.experience-intro { margin-bottom: 64px; }
.intro-card {
  background: linear-gradient(145deg, var(--bg-card), rgba(99,102,241,.06));
  border: 1px solid rgba(99,102,241,.3);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  gap: 32px;
  align-items: start;
  transition: var(--transition);
}
.intro-card:hover {
  border-color: rgba(99,102,241,.5);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(99,102,241,.15);
}
.intro-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  background: rgba(99,102,241,.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--primary);
  flex-shrink: 0;
}
.intro-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.intro-content > p {
  font-size: .95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
}
.intro-meta {
  display: flex;
  gap: 24px;
  font-size: .9rem;
  color: var(--text-light);
}
.intro-meta span {
  display: flex;
  align-items: center;
  gap: 8px;
}
.intro-meta i { color: var(--primary); }

.weeks-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 64px;
}

.week-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.week-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.week-card:hover {
  border-color: rgba(99,102,241,.4);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.week-card:hover::before { opacity: 1; }

.week-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-l);
}
.week-number {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 8px;
}
.week-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}

.week-section {
  margin-bottom: 20px;
}
.week-section h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.week-section h4 i {
  font-size: 1rem;
  color: var(--accent);
}
.week-section p {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.week-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-l);
}

.experience-skills {
  background: linear-gradient(145deg, var(--bg-card), rgba(99,102,241,.06));
  border: 1px solid rgba(99,102,241,.2);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}
.experience-skills h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 32px;
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: default;
}
.skill-item:hover {
  border-color: rgba(99,102,241,.5);
  background: rgba(99,102,241,.08);
  transform: translateY(-4px);
}
.skill-item i {
  font-size: 1.8rem;
  color: var(--primary);
}
.skill-item span {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

.timeline-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
  margin-top: 14px;
}
.timeline-link:hover { gap: 10px; color: var(--accent); }

/* ═══════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════ */
@keyframes fadeInDown {
  from { opacity:0; transform:translateY(-20px); }
  to   { opacity:1; transform:translateY(0); }
}
@keyframes fadeInUp {
  from { opacity:0; transform:translateY(24px); }
  to   { opacity:1; transform:translateY(0); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .weeks-grid { grid-template-columns: 1fr; }
  .skills-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  section { padding: 72px 0; }

  /* Nav */
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(10,11,20,.97);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    transition: transform .4s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 10px 16px; border-radius: var(--radius); }
  .menu-toggle { display: flex; }

  /* Hero */
  .hero-stats { gap: 20px; }
  .stat-num { font-size: 1.6rem; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-info { grid-template-columns: 1fr; }

  /* Skills */
  .skills-categories { grid-template-columns: 1fr; }

  /* Projects */
  .projects-grid { grid-template-columns: 1fr; }

  /* Experience */
  .intro-card { flex-direction: column; gap: 20px; }
  .weeks-grid { grid-template-columns: 1fr; }
  .experience-skills { padding: 32px 24px; }
  .skills-list { grid-template-columns: repeat(2, 1fr); }
  .week-card { padding: 24px; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }

  /* Footer */
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links, .footer-socials { justify-content: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .stat-divider { display: none; }
  .hero-stats { gap: 28px; }
  
  /* Experience */
  .skills-list { grid-template-columns: 1fr; }
  .intro-meta { flex-direction: column; gap: 12px; }
  .week-section h4 { font-size: .8rem; }
}