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

:root {
  --primary:    #2563eb;
  --primary-d:  #1d4ed8;
  --accent:     #f59e0b;
  --dark:       #0f172a;
  --dark-2:     #1e293b;
  --dark-3:     #334155;
  --light:      #f8fafc;
  --light-2:    #e2e8f0;
  --text:       #1e293b;
  --text-muted: #64748b;
  --white:      #ffffff;
  --radius:     12px;
  --radius-lg:  20px;
  --shadow:     0 4px 24px rgba(0,0,0,.08);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.14);
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

h1,h2,h3,h4 { font-family: 'Poppins', sans-serif; line-height: 1.2; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ── UTILITY ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section    { padding: 100px 0; }
.section-dark { background: var(--dark); color: var(--white); }
.section-dark .text-muted { color: var(--light-2); }

.section-header { text-align: center; margin-bottom: 64px; }
.section-label  {
  display: inline-block;
  background: rgba(37,99,235,.12);
  color: var(--primary);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 14px;
}
.section-dark .section-label { background: rgba(37,99,235,.25); color: #93c5fd; }
.section-header h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}
.btn-primary  { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-d); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,.35); }
.btn-outline  { background: transparent; border-color: rgba(255,255,255,.4); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.1); transform: translateY(-2px); }
.btn-full     { width: 100%; justify-content: center; border-radius: var(--radius); }

/* ── NAV ── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 18px 0;
  transition: var(--transition);
}
#navbar.scrolled {
  background: rgba(15,23,42,.95);
  backdrop-filter: blur(16px);
  padding: 12px 0;
  box-shadow: 0 2px 20px rgba(0,0,0,.3);
}
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { font-family: 'Poppins', sans-serif; font-size: 1.5rem; font-weight: 800; color: #fff; }
.logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { color: rgba(255,255,255,.8); font-size: .9rem; font-weight: 500; transition: color var(--transition); }
.nav-links a:hover { color: #fff; }
.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: 50px !important;
}
.nav-cta:hover { background: var(--primary-d) !important; transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.hamburger span { display: block; width: 24px; height: 2px; background: #fff; transition: var(--transition); }

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  background: var(--dark);
  color: #fff;
  position: relative;
  overflow: hidden;
  padding: 120px 24px 80px;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 60% at 70% 50%, rgba(37,99,235,.18) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(245,158,11,.08) 0%, transparent 70%);
}
.hero > * { position: relative; z-index: 1; }
.hero { flex-direction: row; justify-content: space-between; max-width: 100%; }
.hero-content { max-width: 600px; }

.hero-greeting { color: var(--accent); font-weight: 600; font-size: 1rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.hero-name { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; line-height: 1.1; margin-bottom: 20px; }
.hero-name span { color: var(--primary); }
.hero-roles { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.role-tag { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); padding: 6px 16px; border-radius: 50px; font-size: .85rem; font-weight: 500; }
.hero-sub { color: rgba(255,255,255,.7); font-size: 1.05rem; margin-bottom: 32px; max-width: 480px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-family: 'Poppins', sans-serif; font-size: 2rem; font-weight: 800; color: var(--accent); line-height: 1; }
.stat-label { color: rgba(255,255,255,.6); font-size: .8rem; margin-top: 4px; }

/* Hero visual */
.hero-visual {
  position: relative; width: 340px; height: 340px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.avatar-ring {
  width: 220px; height: 220px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 60px rgba(37,99,235,.4);
  animation: pulse 4s ease-in-out infinite;
}
.avatar-inner {
  width: 190px; height: 190px;
  border-radius: 50%;
  background: var(--dark-2);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Poppins', sans-serif;
  font-size: 3rem; font-weight: 800; color: #fff;
  letter-spacing: .05em;
}
.floating-badge {
  position: absolute;
  background: var(--dark-2);
  border: 1px solid rgba(255,255,255,.12);
  padding: 8px 14px;
  border-radius: 50px;
  font-size: .8rem; font-weight: 600;
  display: flex; align-items: center; gap: 6px;
  white-space: nowrap;
  animation: float 3s ease-in-out infinite;
}
.floating-badge i { color: var(--accent); }
.b1 { top: 10px;  left: 0;    animation-delay: 0s; }
.b2 { top: 40px;  right: -10px; animation-delay: .8s; }
.b3 { bottom: 60px; left: -10px; animation-delay: 1.6s; }
.b4 { bottom: 10px;  right: 10px; animation-delay: 2.4s; }

@keyframes float  { 0%,100% { transform: translateY(0); }  50% { transform: translateY(-10px); } }
@keyframes pulse  { 0%,100% { box-shadow: 0 0 60px rgba(37,99,235,.4); } 50% { box-shadow: 0 0 90px rgba(37,99,235,.6); } }

/* ── ABOUT ── */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.about-text p { color: var(--text-muted); margin-bottom: 16px; }
.about-text strong { color: var(--text); }
.about-info { margin: 24px 0; display: flex; flex-direction: column; gap: 10px; }
.info-item { display: flex; align-items: center; gap: 10px; color: var(--text-muted); font-size: .9rem; }
.info-item i { color: var(--primary); width: 18px; }
.lang-row { display: flex; gap: 8px; flex-wrap: wrap; }
.lang-chip { background: var(--light); border: 1px solid var(--light-2); padding: 4px 14px; border-radius: 50px; font-size: .82rem; font-weight: 500; color: var(--text-muted); }
.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-card {
  background: var(--light);
  border: 1px solid var(--light-2);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}
.about-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary); }
.about-card i { font-size: 1.6rem; color: var(--primary); margin-bottom: 10px; }
.about-card h4 { font-size: 1rem; margin-bottom: 6px; }
.about-card p { font-size: .85rem; color: var(--text-muted); }

/* ── SERVICES ── */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  position: relative;
  background: var(--dark-2);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}
.service-card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: 0 12px 40px rgba(37,99,235,.2); }
.service-card.featured { border-color: var(--primary); background: linear-gradient(135deg, rgba(37,99,235,.15), var(--dark-2)); }
.service-badge {
  position: absolute; top: -10px; left: 24px;
  background: var(--accent); color: var(--dark); font-size: .72rem; font-weight: 700;
  padding: 4px 12px; border-radius: 50px; text-transform: uppercase; letter-spacing: .08em;
}
.service-icon { font-size: 2rem; color: var(--primary); margin-bottom: 16px; }
.service-card h3 { font-size: 1.15rem; color: var(--white); margin-bottom: 10px; }
.service-card p { font-size: .88rem; color: rgba(255,255,255,.6); margin-bottom: 16px; }
.service-list { display: flex; flex-direction: column; gap: 6px; }
.service-list li { font-size: .83rem; color: rgba(255,255,255,.55); padding-left: 14px; position: relative; }
.service-list li::before { content: '→'; position: absolute; left: 0; color: var(--primary); }
.services-cta { text-align: center; margin-top: 48px; }
.services-cta p { color: rgba(255,255,255,.6); margin-bottom: 16px; font-size: 1rem; }

/* ── TIMELINE ── */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
  content: ''; position: absolute; left: 0; top: 8px; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--primary), transparent);
}
.timeline-item { position: relative; margin-bottom: 48px; }
.timeline-dot {
  position: absolute; left: -46px; top: 6px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 4px rgba(37,99,235,.2);
}
.timeline-card {
  background: var(--light);
  border: 1px solid var(--light-2);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  transition: var(--transition);
}
.timeline-card:hover { box-shadow: var(--shadow-lg); border-color: var(--primary); }
.timeline-date { display: inline-block; background: rgba(37,99,235,.1); color: var(--primary); font-size: .78rem; font-weight: 700; padding: 4px 12px; border-radius: 50px; margin-bottom: 10px; }
.timeline-card h3 { font-size: 1.2rem; margin-bottom: 4px; }
.timeline-card h4 { font-size: .9rem; color: var(--text-muted); font-weight: 500; margin-bottom: 12px; }
.timeline-card ul { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.timeline-card li { font-size: .88rem; color: var(--text-muted); padding-left: 14px; position: relative; }
.timeline-card li::before { content: '▸'; position: absolute; left: 0; color: var(--primary); }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.timeline-tags span { background: rgba(37,99,235,.1); color: var(--primary); font-size: .75rem; font-weight: 600; padding: 3px 10px; border-radius: 50px; }

/* ── SKILLS ── */
.skills-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.skills-group-title { font-size: 1.1rem; color: rgba(255,255,255,.5); font-weight: 600; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 24px; }
.skill-bar-item { margin-bottom: 18px; }
.skill-info { display: flex; justify-content: space-between; font-size: .88rem; margin-bottom: 6px; color: rgba(255,255,255,.8); }
.skill-bar { height: 8px; background: rgba(255,255,255,.1); border-radius: 50px; overflow: hidden; }
.skill-fill { height: 100%; background: linear-gradient(90deg, var(--primary), #60a5fa); border-radius: 50px; width: 0; transition: width 1.2s cubic-bezier(.4,0,.2,1); }
.cert-row { display: flex; gap: 20px; flex-wrap: wrap; }
.cert-card {
  display: flex; align-items: center; gap: 16px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 20px 24px; flex: 1; min-width: 260px;
}
.cert-card i { font-size: 2rem; color: var(--accent); }
.cert-card strong { display: block; color: #fff; }
.cert-card span { font-size: .82rem; color: rgba(255,255,255,.5); }

/* ── PROJECTS ── */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project-card {
  background: var(--light);
  border: 1px solid var(--light-2);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.project-icon { font-size: 2rem; color: var(--primary); margin-bottom: 14px; }
.project-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.project-card p { font-size: .86rem; color: var(--text-muted); margin-bottom: 14px; }
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.project-tags span { background: rgba(37,99,235,.1); color: var(--primary); font-size: .75rem; font-weight: 600; padding: 3px 10px; border-radius: 50px; }

/* ── EDUCATION ── */
.edu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.edu-card {
  display: flex; gap: 20px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.edu-card:hover { border-color: var(--primary); background: rgba(37,99,235,.08); }
.edu-year { font-family: 'Poppins', sans-serif; font-size: 1.8rem; font-weight: 800; color: var(--accent); flex-shrink: 0; line-height: 1; margin-top: 4px; }
.edu-body h3 { font-size: 1rem; color: #fff; margin-bottom: 4px; }
.edu-body h4 { font-size: .85rem; color: rgba(255,255,255,.5); font-weight: 500; margin-bottom: 6px; }
.edu-body p  { font-size: .83rem; color: rgba(255,255,255,.4); }

/* ── CONTACT ── */
.contact-wrapper { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: start; }
.contact-info h3 { font-size: 1.5rem; margin-bottom: 12px; }
.contact-info > p { color: var(--text-muted); margin-bottom: 28px; }
.contact-details { display: flex; flex-direction: column; gap: 14px; margin-bottom: 28px; }
.contact-detail-item {
  display: flex; align-items: center; gap: 14px;
  background: var(--light);
  border: 1px solid var(--light-2);
  border-radius: var(--radius);
  padding: 14px 18px;
  transition: var(--transition);
}
a.contact-detail-item:hover { border-color: var(--primary); transform: translateX(4px); }
.contact-icon { width: 40px; height: 40px; background: rgba(37,99,235,.1); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.contact-detail-item strong { display: block; font-size: .85rem; margin-bottom: 2px; }
.contact-detail-item span { font-size: .82rem; color: var(--text-muted); }
.social-links { display: flex; gap: 12px; }
.social-links a {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--light);
  border: 1px solid var(--light-2);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 1rem;
  transition: var(--transition);
}
.social-links a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-3px); }

/* Form */
.contact-form {
  background: var(--light);
  border: 1px solid var(--light-2);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--white);
  border: 1.5px solid var(--light-2);
  border-radius: var(--radius);
  font-size: .9rem;
  font-family: 'Inter', sans-serif;
  color: var(--text);
  transition: border-color var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.form-group textarea { resize: vertical; }

.form-status { margin-top: 14px; padding: 12px 16px; border-radius: var(--radius); font-size: .88rem; font-weight: 500; display: none; }
.form-status.success { background: #dcfce7; color: #166534; border: 1px solid #86efac; display: block; }
.form-status.error   { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; display: block; }

/* ── FOOTER ── */
footer { background: var(--dark); color: rgba(255,255,255,.6); padding: 60px 0 30px; }
.footer-content { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 32px; margin-bottom: 40px; }
.footer-brand p { font-size: .88rem; margin-top: 8px; max-width: 220px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: .88rem; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 8px; }
.footer-contact a { font-size: .88rem; display: flex; align-items: center; gap: 8px; transition: color var(--transition); }
.footer-contact a:hover { color: #fff; }
.footer-contact i { color: var(--primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 24px; display: flex; justify-content: space-between; font-size: .82rem; flex-wrap: wrap; gap: 8px; }

/* ── BACK TO TOP ── */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  background: var(--primary); color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  box-shadow: var(--shadow);
  opacity: 0; pointer-events: none;
  transform: translateY(10px);
  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(-3px); }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .hero { flex-direction: column; text-align: center; padding-top: 140px; }
  .hero-content { max-width: 100%; }
  .hero-roles, .hero-actions, .hero-stats { justify-content: center; }
  .hero-sub { margin-inline: auto; }
  .hero-visual { margin-top: 48px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .services-grid  { grid-template-columns: 1fr 1fr; }
  .projects-grid  { grid-template-columns: 1fr 1fr; }
  .contact-wrapper { grid-template-columns: 1fr; gap: 40px; }
  .edu-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--dark); flex-direction: column; padding: 20px 24px; gap: 16px; }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .services-grid  { grid-template-columns: 1fr; }
  .projects-grid  { grid-template-columns: 1fr; }
  .skills-wrapper { grid-template-columns: 1fr; gap: 40px; }
  .about-cards { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .timeline { padding-left: 24px; }
  .contact-form { padding: 24px; }
  .footer-content { flex-direction: column; }
  .hero-visual { width: 260px; height: 260px; }
  .avatar-ring { width: 170px; height: 170px; }
  .avatar-inner { width: 148px; height: 148px; font-size: 2.2rem; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2.2rem; }
  .section { padding: 70px 0; }
  .floating-badge { display: none; }
  .hero-stats { gap: 24px; }
}