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

:root {
  --clr-bg: #0a0a0f;
  --clr-bg-2: #111118;
  --clr-surface: #16161f;
  --clr-surface-2: #1e1e2a;
  --clr-border: rgba(255,255,255,0.07);
  --clr-text: #e8e8f0;
  --clr-text-muted: #8888a8;
  --clr-accent: #6c63ff;
  --clr-accent-2: #a78bfa;
  --clr-accent-glow: rgba(108,99,255,0.25);
  --clr-blue: #3b82f6;
  --clr-purple: #8b5cf6;
  --clr-green: #10b981;
  --clr-orange: #f59e0b;
  --font: 'Inter', system-ui, sans-serif;
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 4px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(108,99,255,0.15);
}

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

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
}

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

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 7rem 0;
}

.section--dark {
  background-color: var(--clr-bg-2);
}

/* ============================================================
   SECTION HEADER
   ============================================================ */
.section__header {
  margin-bottom: 3.5rem;
}

.section__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-accent);
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.25);
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.section__title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--clr-text);
}

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.2rem 0;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--clr-border);
}

.nav__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--clr-accent);
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.3);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}

.nav__links {
  display: flex;
  gap: 2.5rem;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--clr-accent);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav__links a:hover {
  color: var(--clr-text);
}

.nav__links a:hover::after {
  width: 100%;
}

.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(--clr-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 8rem 2rem 4rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 60% 40%, rgba(108,99,255,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 70%, rgba(167,139,250,0.07) 0%, transparent 60%);
  pointer-events: none;
}

.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero__content {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--clr-green);
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.hero__badge::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--clr-green);
  border-radius: 50%;
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.hero__name {
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--clr-text);
  margin-bottom: 1.2rem;
}

.hero__name span {
  background: linear-gradient(135deg, var(--clr-accent) 0%, var(--clr-accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__role {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: 1.5rem;
}

.hero__desc {
  font-size: 1.1rem;
  color: var(--clr-text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--clr-accent);
  color: #fff;
  box-shadow: 0 0 30px rgba(108,99,255,0.4);
}

.btn--primary:hover {
  background: #7c74ff;
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(108,99,255,0.6);
}

.btn--outline {
  background: transparent;
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
}

.btn--outline:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  transform: translateY(-2px);
}

.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero__scroll span {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  writing-mode: vertical-rl;
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--clr-accent), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about__text p {
  color: var(--clr-text-muted);
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
}

.about__text p strong {
  color: var(--clr-text);
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-2));
  opacity: 0;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: rgba(108,99,255,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-card__number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--clr-accent);
  letter-spacing: -0.04em;
}

.stat-card__unit {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-accent);
}

.stat-card__label {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-top: 0.4rem;
  line-height: 1.4;
}

/* ============================================================
   TIMELINE
   ============================================================ */
.timeline {
  position: relative;
}

.timeline__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.timeline__marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 0.4rem;
}

.timeline__dot {
  width: 14px;
  height: 14px;
  background: var(--clr-accent);
  border-radius: 50%;
  border: 3px solid var(--clr-bg-2);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.3);
  flex-shrink: 0;
}

.timeline__line {
  width: 2px;
  flex: 1;
  background: linear-gradient(to bottom, var(--clr-accent), transparent);
  margin-top: 0.5rem;
  opacity: 0.4;
}

.timeline__card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
}

.timeline__card:hover {
  border-color: rgba(108,99,255,0.25);
  box-shadow: var(--shadow-glow);
}

.timeline__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.timeline__role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 0.3rem;
}

.timeline__company {
  font-size: 0.875rem;
  color: var(--clr-accent);
  font-weight: 500;
}

.timeline__period {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid var(--clr-border);
}

.timeline__list {
  list-style: none;
  margin-bottom: 1.2rem;
}

.timeline__list li {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  padding: 0.4rem 0;
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.6;
}

.timeline__list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--clr-accent);
  font-weight: 700;
}

.timeline__list li strong {
  color: var(--clr-text);
}

.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.timeline__tags span {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--clr-accent);
  background: rgba(108,99,255,0.1);
  border: 1px solid rgba(108,99,255,0.2);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
}

/* ============================================================
   EDUCATION
   ============================================================ */
.education__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.edu-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: var(--transition);
  text-align: center;
}

.edu-card:hover {
  border-color: rgba(108,99,255,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.edu-card__icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.edu-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 0.4rem;
}

.edu-card p {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  margin-bottom: 0.6rem;
}

.edu-card span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--clr-accent);
  background: rgba(108,99,255,0.1);
  border: 1px solid rgba(108,99,255,0.2);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.project-card:hover {
  border-color: rgba(108,99,255,0.25);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.project-card__accent {
  height: 4px;
  width: 100%;
}

.accent--blue { background: linear-gradient(90deg, #3b82f6, #6366f1); }
.accent--purple { background: linear-gradient(90deg, #8b5cf6, #ec4899); }
.accent--green { background: linear-gradient(90deg, #10b981, #3b82f6); }
.accent--orange { background: linear-gradient(90deg, #f59e0b, #ef4444); }

.project-card__body {
  padding: 2rem;
}

.project-card__icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.project-card__body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 0.75rem;
}

.project-card__body p {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}

.project-card__body p strong {
  color: var(--clr-text);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-card__tags span {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}

.skill-group__title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 1rem;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-pills span {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--clr-text);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  transition: var(--transition);
}

.skill-pills span:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: rgba(108,99,255,0.08);
}

/* CERTS */
.certs__title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 1.5rem;
}

.certs__list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  transition: var(--transition);
}

.cert-item:hover {
  border-color: rgba(108,99,255,0.3);
}

.cert-item__check {
  width: 24px;
  height: 24px;
  background: rgba(16,185,129,0.15);
  border: 1px solid rgba(16,185,129,0.3);
  color: var(--clr-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

.cert-item span {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  line-height: 1.4;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact__wrapper {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact__desc {
  font-size: 1.05rem;
  color: var(--clr-text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.contact__items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact__item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  transition: var(--transition);
}

.contact__item:hover {
  border-color: rgba(108,99,255,0.3);
  transform: translateX(4px);
}

.contact__item-icon {
  width: 40px;
  height: 40px;
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.25);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-accent);
  flex-shrink: 0;
}

.contact__item-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-text-muted);
}

.contact__item-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text);
}

.contact__languages h3 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 1.5rem;
}

.lang-item {
  margin-bottom: 1.5rem;
}

.lang-item__header {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text);
  margin-bottom: 0.5rem;
}

.lang-bar {
  height: 6px;
  background: var(--clr-surface-2);
  border-radius: 3px;
  overflow: hidden;
}

.lang-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-2));
  border-radius: 3px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.lang-bar__fill.animated {
  transform: scaleX(1);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  padding: 2rem 0;
  text-align: center;
}

.footer p {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .education__grid {
    grid-template-columns: 1fr;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .skills__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .certs__list {
    grid-template-columns: 1fr 1fr;
  }

  .contact__wrapper {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10,10,15,0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 99;
  }

  .nav__links.open {
    display: flex;
  }

  .nav__links a {
    font-size: 1.5rem;
  }

  .nav__hamburger {
    display: flex;
    z-index: 101;
  }

  .hero {
    padding: 7rem 1.5rem 4rem;
  }

  .hero__scroll {
    display: none;
  }

  .about__stats {
    grid-template-columns: 1fr 1fr;
  }

  .timeline__item {
    grid-template-columns: 24px 1fr;
    gap: 1rem;
  }

  .timeline__header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .certs__list {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 5rem 0;
  }
}

@media (max-width: 480px) {
  .about__stats {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}