/* ===========================
   DESIGN SYSTEM - VARIABLES
   =========================== */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700;800&family=Lora:ital,wght@0,400;0,600;1,400&display=swap');

:root {
  /* Colors */
  --primary: #00ACCC;
  --primary-dark: #0090AA;
  --primary-light: #e0f7fc;
  --navy: #002B33;
  --navy-mid: #004455;
  --white: #FFFFFF;
  --grey-light: #F4F6F8;
  --grey-mid: #EBEBEB;
  --grey-text: #777777;
  --dark-text: #1a1a2e;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Lora', serif;

  /* Spacing */
  --section-pad: 100px 0;
  --container-width: 1100px;

  /* Transitions */
  --transition: all 0.35s ease;
  --transition-slow: all 0.65s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

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

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

ul { list-style: none; }

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===========================
   SCROLL ANIMATIONS
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

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

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.30s; }
.delay-3 { transition-delay: 0.45s; }
.delay-4 { transition-delay: 0.60s; }

/* ===========================
   NAVIGATION
   =========================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.2rem 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(0, 43, 51, 0.97);
  padding: 0.8rem 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(10px);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--white);
  letter-spacing: 1px;
}

.nav-logo span { color: var(--primary); }

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.6rem 1.4rem;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: 3px;
  transition: var(--transition);
}

.nav-cta:hover {
  background: var(--primary);
  color: var(--white);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.hamburger span {
  width: 26px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===========================
   HERO
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, var(--navy) 0%, #004d5e 50%, #001822 100%);
  overflow: hidden;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0.4;
  animation: float var(--dur, 6s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.4; }
  50% { transform: translate(var(--tx, 20px), var(--ty, -20px)) scale(1.5); opacity: 0.8; }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 172, 204, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 172, 204, 0.07) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
}

.hero-eyebrow {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 1.2rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.3s forwards;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.5s forwards;
}

.hero-name .highlight {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.hero-role {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.7s forwards;
}

.hero-role .typed-text {
  color: var(--primary);
  border-right: 2px solid var(--primary);
  padding-right: 3px;
  animation: blink 0.9s step-end infinite;
}

@keyframes blink {
  0%, 100% { border-color: var(--primary); }
  50% { border-color: transparent; }
}

.hero-tags {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.9s forwards;
}

.hero-tag {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(0, 172, 204, 0.4);
  color: rgba(255, 255, 255, 0.75);
  border-radius: 2px;
  backdrop-filter: blur(5px);
}

.hero-actions {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s ease 1.1s forwards;
}

.hero-socials {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 3rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 1.3s forwards;
}

.hero-socials a {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
  transition: var(--transition);
}

.hero-socials a:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-3px);
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-heading);
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  animation: fadeUp 0.7s ease 1.5s forwards;
  opacity: 0;
}

.scroll-dot {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, rgba(0, 172, 204, 0.8), transparent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 0.6; }
  50% { transform: scaleY(0.6); opacity: 1; }
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
  from { opacity: 0; transform: translateY(25px); }
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 0.85rem 2rem;
  border-radius: 3px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 172, 204, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.btn-dark:hover {
  background: var(--navy-mid);
  border-color: var(--navy-mid);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 43, 51, 0.3);
}

/* ===========================
   SECTION HEADER
   =========================== */
.section-eyebrow {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.25;
  margin-bottom: 1.5rem;
}

.section-title.light {
  color: var(--white);
}

.section-divider {
  width: 50px;
  height: 3px;
  background: var(--primary);
  margin-bottom: 2rem;
}

/* ===========================
   ABOUT
   =========================== */
#sobre { padding: var(--section-pad); background: var(--white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 6rem;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
}

.about-image-frame {
  width: 100%;
  aspect-ratio: 1;
  max-width: 380px;
  margin: 0 auto;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  background: var(--grey-mid);
  box-shadow: 0 20px 60px rgba(0, 43, 51, 0.15);
}

.about-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-avatar-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  font-family: var(--font-heading);
  font-size: 5rem;
  font-weight: 700;
  color: var(--primary);
}

.about-frame-accent {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 18px;
  left: 18px;
  border: 2px solid var(--primary);
  border-radius: 8px;
  z-index: -1;
}

.about-badge {
  position: absolute;
  bottom: -1rem;
  right: -1rem;
  background: var(--navy);
  color: var(--white);
  padding: 1.2rem 1.5rem;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 8px 25px rgba(0, 43, 51, 0.3);
}

.about-badge-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
  line-height: 1;
}

.about-badge-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: 0.8;
}

.about-bio {
  font-size: 1.05rem;
  color: var(--grey-text);
  line-height: 1.9;
  margin-bottom: 1.8rem;
}

.about-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.about-info-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.about-info-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
}

.about-info-value {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--navy);
}

/* ===========================
   SKILLS / STACK
   =========================== */
#stack { padding: var(--section-pad); background: var(--grey-light); }

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.stack-card {
  background: var(--white);
  border-radius: 8px;
  padding: 2rem;
  border-top: 3px solid var(--primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.stack-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.stack-card-icon {
  width: 50px;
  height: 50px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
  color: var(--primary);
}

.stack-card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.8rem;
}

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

.stack-tag {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 0.3rem 0.75rem;
  background: var(--grey-mid);
  color: var(--navy);
  border-radius: 20px;
  transition: var(--transition);
}

.stack-tag:hover {
  background: var(--primary);
  color: var(--white);
}

/* ===========================
   EXPERIENCE (RESUME)
   =========================== */
#experiencia { padding: var(--section-pad); background: var(--white); }

.experience-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
}

.exp-column-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.exp-column-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--grey-mid);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--grey-mid));
}

.timeline-item {
  padding-left: 2.8rem;
  padding-bottom: 2.5rem;
  position: relative;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: 0;
  top: 5px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--primary);
  z-index: 1;
  transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
  background: var(--primary);
}

.timeline-period {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.4rem;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.2rem;
}

.timeline-sub {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--grey-text);
  margin-bottom: 0.8rem;
}

.timeline-desc {
  font-size: 0.92rem;
  color: var(--grey-text);
  line-height: 1.8;
}

/* ===========================
   AI SECTION
   =========================== */
#pesquisa {
  padding: var(--section-pad);
  background: linear-gradient(135deg, var(--navy) 0%, #004d5e 100%);
  position: relative;
  overflow: hidden;
}

#pesquisa::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 172, 204, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 172, 204, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.research-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(0, 172, 204, 0.25);
  border-radius: 10px;
  padding: 2rem;
  backdrop-filter: blur(5px);
  transition: var(--transition);
}

.research-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary);
  transform: translateY(-4px);
}

.research-card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.research-card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.8rem;
}

.research-card-desc {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
}

/* ===========================
   CONTACT / FOOTER
   =========================== */
#contato { padding: var(--section-pad); background: var(--grey-light); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.contact-text {
  font-size: 1.05rem;
  color: var(--grey-text);
  line-height: 1.9;
  margin-bottom: 2.5rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--navy);
  transition: var(--transition);
}

.contact-link i {
  width: 42px;
  height: 42px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
}

.contact-link:hover {
  color: var(--primary);
}

.contact-link:hover i {
  background: var(--primary);
  color: var(--white);
}

.contact-card {
  background: var(--white);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  text-align: center;
}

.contact-card-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.8rem;
}

.contact-card-sub {
  color: var(--grey-text);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.contact-card-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

footer {
  background: var(--navy);
  padding: 3rem 0;
  text-align: center;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-logo span { color: var(--primary); }

.footer-nav {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.footer-nav a {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}

.footer-nav a:hover { color: var(--primary); }

.footer-copy {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 0.5px;
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .about-image-frame { max-width: 280px; }
  .experience-layout { grid-template-columns: 1fr; gap: 3rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .research-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(0, 43, 51, 0.98);
    backdrop-filter: blur(20px);
    padding: 2rem;
    gap: 1.5rem;
    align-items: center;
    z-index: 999;
    border-top: 1px solid rgba(0, 172, 204, 0.2);
  }

  .nav-links a { font-size: 1rem; }

  .hero-actions { flex-direction: column; align-items: center; }
  .about-info-grid { grid-template-columns: 1fr; }
  .about-badge { position: static; display: inline-block; margin-top: 1rem; }
  .about-image-wrapper { text-align: center; }
  .stack-grid { grid-template-columns: 1fr; }
  .footer-nav { flex-wrap: wrap; gap: 1rem; }
}

@media (max-width: 480px) {
  :root { --section-pad: 70px 0; }
  .hero-name { font-size: 2.5rem; }
}