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

:root {
  --bg:           #0a0a0f;
  --bg-card:      #111118;
  --bg-card-hover:#16161f;
  --border:       rgba(255,255,255,0.07);
  --accent:       #6c63ff;
  --accent-light: #8b85ff;
  --accent-glow:  rgba(108,99,255,0.25);
  --text:         #e8e8f0;
  --text-muted:   #8888a8;
  --text-subtle:  #555570;
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-display: 'Syne', sans-serif;
  --radius:       12px;
  --radius-lg:    20px;
  --nav-h:        64px;
  --transition:   0.3s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* =========================================
   SCROLLBAR
   ========================================= */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* =========================================
   TYPOGRAPHY HELPERS
   ========================================= */
.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
}
.section__title::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 0.5rem;
}

/* =========================================
   CONTAINER
   ========================================= */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* =========================================
   BUTTONS
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  letter-spacing: 0.02em;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow);
}
.btn--primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 0 36px var(--accent-glow);
}
.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn--full { width: 100%; justify-content: center; }

/* =========================================
   NAV
   ========================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: var(--transition);
}
.nav.scrolled {
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.nav__links {
  display: flex;
  gap: 2rem;
  align-items: center;
}
.nav__links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav__links a:hover,
.nav__links a.active { color: var(--text); }
.nav__links a:hover::after,
.nav__links a.active::after { transform: scaleX(1); }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================
   HERO
   ========================================= */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: var(--nav-h) 1.5rem 0;
  max-width: 1100px;
  margin: 0 auto;
  gap: 3rem;
  position: relative;
}

.hero__greeting {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.hero__name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__title {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--accent);
  font-weight: 500;
  min-height: 2rem;
  margin-bottom: 1.25rem;
}
.hero__title .cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__summary {
  color: var(--text-muted);
  max-width: 520px;
  font-size: 1.05rem;
  margin-bottom: 2rem;
  line-height: 1.7;
}
.hero__cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.hero__socials {
  display: flex;
  gap: 1rem;
}
.hero__socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
}
.hero__socials a svg { width: 18px; height: 18px; }
.hero__socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 0 16px var(--accent-glow);
}

/* Avatar graphic */
.hero__graphic {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  height: 380px;
}
.hero__avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  color: #fff;
  z-index: 2;
  box-shadow: 0 0 60px var(--accent-glow);
}
.hero__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
  animation: spin linear infinite;
}
.hero__ring--1 {
  width: 300px; height: 300px;
  animation-duration: 20s;
  border-color: rgba(108,99,255,0.2);
}
.hero__ring--2 {
  width: 380px; height: 380px;
  animation-duration: 35s;
  animation-direction: reverse;
  border-color: rgba(108,99,255,0.1);
}
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-subtle);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-subtle), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse { 0%,100% { opacity: 0.3; } 50% { opacity: 1; } }

/* =========================================
   SECTIONS
   ========================================= */
.section {
  padding: 6rem 0;
}
.section:nth-child(even) {
  background: rgba(255,255,255,0.015);
}

/* =========================================
   ABOUT
   ========================================= */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about__text p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.02rem;
  line-height: 1.8;
}
.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px var(--accent-glow);
}
.stat-card__number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.stat-card__number::after { content: '+'; }
.stat-card__label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* =========================================
   EXPERIENCE / TIMELINE
   ========================================= */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline__item {
  position: relative;
  margin-bottom: 2.5rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.timeline__item.visible { opacity: 1; transform: translateY(0); }

.timeline__dot {
  position: absolute;
  left: -2rem;
  top: 1.25rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: 0 0 12px var(--accent-glow);
}
.timeline__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
}
.timeline__card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(108,99,255,0.3);
  transform: translateX(4px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}
.timeline__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.timeline__role {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
}
.timeline__company {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
}
.timeline__date {
  font-size: 0.82rem;
  color: var(--text-muted);
  background: rgba(108,99,255,0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  white-space: nowrap;
  border: 1px solid rgba(108,99,255,0.2);
}
.timeline__bullets {
  list-style: none;
  margin-bottom: 1.25rem;
}
.timeline__bullets li {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.6;
}
.timeline__bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}
.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.timeline__tags span {
  font-size: 0.75rem;
  background: rgba(108,99,255,0.1);
  color: var(--accent-light);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  border: 1px solid rgba(108,99,255,0.2);
}

/* =========================================
   SKILLS
   ========================================= */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(20px);
}
.skill-group.visible { opacity: 1; transform: translateY(0); }
.skill-group:hover {
  background: var(--bg-card-hover);
  border-color: rgba(108,99,255,0.3);
  box-shadow: 0 8px 40px rgba(0,0,0,0.2);
}
.skill-group__title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.25rem;
}
.skill-group__title svg {
  width: 20px; height: 20px;
  color: var(--accent);
  flex-shrink: 0;
}
.skill-group__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill-tag {
  font-size: 0.8rem;
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  padding: 0.35rem 0.8rem;
  border-radius: 50px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.skill-tag:hover {
  background: rgba(108,99,255,0.12);
  border-color: var(--accent);
  color: var(--accent-light);
}

/* =========================================
   EDUCATION
   ========================================= */
.edu__grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: start;
}
.edu__subtitle {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.edu__card {
  display: flex;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  align-items: flex-start;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s;
}
.edu__card.visible { opacity: 1; transform: translateY(0); }
.edu__icon { font-size: 2rem; }
.edu__card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.25rem; }
.edu__card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.25rem; }
.edu__card span { font-size: 0.8rem; color: var(--text-subtle); }

.cert-list { display: flex; flex-direction: column; gap: 0.75rem; }
.cert-card {
  display: flex;
  gap: 1rem;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.5rem;
  transition: var(--transition);
  opacity: 0;
  transform: translateX(-10px);
}
.cert-card.visible { opacity: 1; transform: translateX(0); }
.cert-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(108,99,255,0.3);
  transform: translateX(4px);
}
.cert-card__badge {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.75rem;
  color: #fff;
  flex-shrink: 0;
  letter-spacing: 0.05em;
}
.cert-card h4 { font-size: 0.92rem; font-weight: 500; margin-bottom: 0.15rem; }
.cert-card span { font-size: 0.8rem; color: var(--text-muted); }

/* =========================================
   CONTACT
   ========================================= */
.contact__intro {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 3rem;
  max-width: 500px;
}
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  align-items: start;
}
.contact__links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact__item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.contact__item svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--accent); }
.contact__item:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--text);
  transform: translateX(4px);
}

/* Form */
.contact__form { display: flex; flex-direction: column; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }
.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 0.8rem 1rem;
  transition: var(--transition);
  resize: vertical;
  outline: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-subtle); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input.error,
.form-group textarea.error { border-color: #f87171; }
.form__status {
  font-size: 0.9rem;
  text-align: center;
  min-height: 1.4em;
  color: var(--accent-light);
}
.form__status.error { color: #f87171; }

/* =========================================
   FOOTER
   ========================================= */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
}
.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer p { color: var(--text-subtle); font-size: 0.85rem; }
.footer__links { display: flex; gap: 1.5rem; }
.footer__links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--accent); }

/* =========================================
   ANIMATION HELPER
   ========================================= */
[data-animate] {
  opacity: 0;
  transform: translateY(20px);
}
[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 900px) {
  .about__grid, .edu__grid, .contact__grid { grid-template-columns: 1fr; }
  .skills__grid { grid-template-columns: 1fr; }
  .edu__grid { gap: 2rem; }
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: calc(var(--nav-h) + 2rem);
  }
  .hero__summary { margin: 0 auto 2rem; }
  .hero__cta { justify-content: center; }
  .hero__socials { justify-content: center; }
  .hero__graphic { display: none; }
  .hero__scroll-hint { display: none; }

  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(10,10,15,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border);
  }
  .nav__links.open { display: flex; }
  .nav__hamburger { display: flex; }

  .timeline { padding-left: 1.5rem; }
  .about__stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .about__stats { grid-template-columns: 1fr 1fr; }
  .hero__cta { flex-direction: column; align-items: center; }
  .contact__grid { grid-template-columns: 1fr; }
}