/* =============================================================
   NORTIVA STUDIO — Design tokens
============================================================= */
:root{
  --bg: #09090B;
  --bg-elevated: #0c0c0f;
  --card: #111113;
  --card-hover: #17171a;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --text: #ffffff;
  --text-secondary: #9a9aa2;
  --text-tertiary: #626269;
  --accent: #0196B2;
  --accent-soft: rgba(1,150,178,0.12);
  --accent-glow: rgba(1,150,178,0.35);

  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, monospace;

  --container: 1120px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
button{ font-family: inherit; cursor: pointer; }
h1,h2,h3,h4,p{ margin: 0; }

.container{
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Focus visibility for accessibility */
a:focus-visible,
button:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link{
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--accent);
  color: #04222a;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  z-index: 999;
  transition: top .2s var(--ease);
}
.skip-link:focus{ top: 16px; }

/* =============================================================
   Background grid + glow
============================================================= */
.bg-grid{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, black 10%, transparent 70%);
          mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, black 10%, transparent 70%);
}

/* =============================================================
   Header
============================================================= */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: padding .35s var(--ease), background-color .35s var(--ease), border-color .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled{
  padding: 12px 0;
  background: rgba(9,9,11,0.75);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.logo-mark{
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(155deg, var(--accent) 0%, #045a6b 100%);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset, 0 0 16px rgba(1,150,178,0.45);
  flex-shrink: 0;
}
.logo-dot{ color: var(--accent); }

.nav-desktop ul{
  display: flex;
  gap: 36px;
}
.nav-desktop a{
  font-size: 14.5px;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color .2s var(--ease);
}
.nav-desktop a::after{
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s var(--ease);
}
.nav-desktop a:hover{ color: var(--text); }
.nav-desktop a:hover::after{ transform: scaleX(1); }

.header-actions{
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-github{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(255,255,255,0.02);
  transition: border-color .2s var(--ease), background-color .2s var(--ease), transform .2s var(--ease);
}
.btn-github:hover{
  border-color: var(--border-strong);
  background: rgba(255,255,255,0.05);
  transform: translateY(-1px);
}

.menu-toggle{
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.menu-toggle span{
  width: 16px;
  height: 1.5px;
  background: var(--text);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.menu-toggle.active span:nth-child(1){ transform: translateY(5.5px) rotate(45deg); }
.menu-toggle.active span:nth-child(2){ opacity: 0; }
.menu-toggle.active span:nth-child(3){ transform: translateY(-5.5px) rotate(-45deg); }

.nav-mobile{
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s var(--ease), border-color .35s var(--ease);
  border-top: 1px solid transparent;
}
.nav-mobile.open{
  max-height: 320px;
  border-top: 1px solid var(--border);
  background: rgba(9,9,11,0.92);
  backdrop-filter: blur(14px);
}
.nav-mobile ul{
  padding: 8px 24px 20px;
  display: flex;
  flex-direction: column;
}
.nav-mobile a{
  display: block;
  padding: 12px 0;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.nav-mobile li:last-child a{ border-bottom: none; color: var(--accent); }

/* =============================================================
   Buttons
============================================================= */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 600;
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
  white-space: nowrap;
}
.btn svg{ transition: transform .25s var(--ease); }
.btn:hover svg{ transform: translateX(3px); }

.btn-primary{
  background: var(--accent);
  color: #04222a;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.06) inset, 0 8px 24px -8px rgba(1,150,178,0.55);
}
.btn-primary:hover{
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset, 0 14px 32px -8px rgba(1,150,178,0.75);
}

.btn-secondary{
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover{
  border-color: var(--border-strong);
  background: rgba(255,255,255,0.03);
  transform: translateY(-2px);
}

.btn-lg{ padding: 15px 28px; font-size: 15.5px; }

/* =============================================================
   Reveal on scroll
============================================================= */
.reveal{
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in-view{
  opacity: 1;
  transform: translateY(0);
}

/* =============================================================
   Eyebrow / labels
============================================================= */
.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-transform: none;
  margin-bottom: 18px;
}
.eyebrow-dot{
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%, 100%{ opacity: 1; }
  50%{ opacity: 0.35; }
}

/* =============================================================
   Hero
============================================================= */
.hero{
  position: relative;
  padding: 200px 0 140px;
  overflow: hidden;
}
.hero-glow{
  position: absolute;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 560px;
  background: radial-gradient(closest-side, rgba(1,150,178,0.28), rgba(1,150,178,0.06) 55%, transparent 75%);
  filter: blur(10px);
  pointer-events: none;
  z-index: 0;
}
.hero-inner{
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 880px;
}

.hero-title{
  font-size: clamp(2.4rem, 5.4vw, 4.4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--text);
}
.text-accent{ color: var(--accent); }

.hero-subtitle{
  margin: 26px auto 0;
  max-width: 620px;
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.65;
}

.hero-actions{
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.hero-meta{
  margin-top: 64px;
  display: flex;
  justify-content: center;
  gap: 28px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-tertiary);
}

/* =============================================================
   Sections
============================================================= */
.section{
  position: relative;
  z-index: 1;
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.section-head{
  max-width: 640px;
  margin-bottom: 64px;
}
.section-title{
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.section-desc{
  margin-top: 18px;
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =============================================================
   About cards
============================================================= */
.grid-3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform .35s var(--ease), border-color .35s var(--ease), background-color .35s var(--ease);
}
.card:hover{
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--card-hover);
}
.card-icon{
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: var(--accent-soft);
  margin-bottom: 20px;
}
.card h3{
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.card p{
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* =============================================================
   Services grid
============================================================= */
.grid-4{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-card{
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
  overflow: hidden;
}
.service-card::before{
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(180px circle at 50% 0%, var(--accent-soft), transparent 70%);
  opacity: 0;
  transition: opacity .35s var(--ease);
}
.service-card:hover{
  transform: translateY(-4px);
  border-color: rgba(1,150,178,0.35);
  box-shadow: 0 16px 40px -20px rgba(1,150,178,0.4);
}
.service-card:hover::before{ opacity: 1; }

.service-index{
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  margin-bottom: 20px;
}
.service-card h3{
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  position: relative;
}
.service-card p{
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  position: relative;
}

/* =============================================================
   Projects
============================================================= */
.projects-list{
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-row{
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: border-color .35s var(--ease), background-color .35s var(--ease), transform .35s var(--ease);
}
.project-row:hover{
  border-color: var(--border-strong);
  background: var(--card-hover);
  transform: translateY(-3px);
}

.project-tag{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 5px 10px;
  border-radius: 6px;
  margin-bottom: 16px;
}
.project-info h3{
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.project-info p{
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.65;
  max-width: 440px;
}

.project-visual{
  position: relative;
  height: 150px;
  border-radius: var(--radius-md);
  background:
    radial-gradient(circle at 70% 20%, rgba(1,150,178,0.22), transparent 60%),
    linear-gradient(160deg, #0d0d10, #08080a);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  transition: border-color .35s var(--ease);
}
.project-row:hover .project-visual{ border-color: rgba(1,150,178,0.3); }

/* Padrão decorativo — some visualmente atrás da imagem, mas serve de
   fallback caso a imagem não seja encontrada (ver onerror no HTML) */
.project-visual-grid{
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 20px 20px;
  -webkit-mask-image: linear-gradient(160deg, black, transparent 75%);
          mask-image: linear-gradient(160deg, black, transparent 75%);
}

/* Imagem real do projeto */
.project-visual img{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(1.05) contrast(1.02);
  transition: transform .5s var(--ease), filter .35s var(--ease);
}
.project-row:hover .project-visual img{
  transform: scale(1.04);
}

/* Overlay para manter o label legível sobre a imagem e reforçar
   a identidade escura da marca */
.project-visual::after{
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(9,9,11,0) 45%, rgba(9,9,11,0.85) 100%);
  pointer-events: none;
}

.project-visual-label{
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: rgba(255,255,255,0.7);
  padding: 12px 14px;
}

/* =============================================================
   CTA
============================================================= */
.cta-section{ padding-bottom: 140px; }
.cta-box{
  position: relative;
  text-align: center;
  padding: 90px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--card);
  overflow: hidden;
}
.cta-glow{
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(closest-side, rgba(1,150,178,0.3), transparent 70%);
  pointer-events: none;
}
.cta-box h2{
  position: relative;
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.cta-box p{
  position: relative;
  margin: 18px 0 36px;
  color: var(--text-secondary);
  font-size: 1.02rem;
}
.cta-box .btn{ position: relative; }

/* ========================================
   FOOTER
======================================== */

.footer-simple {
    padding: 25px 8%;

    text-align: center;

    background: transparent;
    color: #6b7280;

    border-top: 1px solid rgba(255, 255, 255, .06);

    font-size: 12px;
    letter-spacing: 1px;
}

/* =============================================================
   Back to top
============================================================= */
.back-to-top{
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(17,17,19,0.85);
  backdrop-filter: blur(10px);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), border-color .3s var(--ease);
  z-index: 90;
}
.back-to-top.visible{
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover{ border-color: var(--accent); color: var(--accent); }

/* =============================================================
   Responsive
============================================================= */
@media (max-width: 960px){
  .grid-4{ grid-template-columns: repeat(2, 1fr); }
  .project-row{ grid-template-columns: 1fr; }
  .project-visual{ height: 120px; }
}

@media (max-width: 760px){
  .nav-desktop, .btn-github{ display: none; }
  .menu-toggle{ display: flex; }

  .hero{ padding: 150px 0 100px; }
  .section{ padding: 88px 0; }

  .grid-3{ grid-template-columns: 1fr; }
  .grid-4{ grid-template-columns: 1fr; }

  .hero-meta{ gap: 16px; flex-wrap: wrap; }

  .site-footer{ padding-top: 64px; }
  .footer-top{
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 44px;
    padding-bottom: 44px;
  }
  .footer-brand{
    max-width: none;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .footer-brand p{ max-width: 300px; }
  .footer-groups{
    gap: 56px;
    justify-content: center;
  }
  .footer-group{ align-items: center; }
  .footer-bottom{
    flex-direction: column-reverse;
    align-items: center;
    text-align: center;
    gap: 10px;
    padding: 24px 0 40px;
  }
}

@media (max-width: 420px){
  .container{ padding: 0 18px; }
  .hero-actions{ flex-direction: column; align-items: stretch; }
  .hero-actions .btn{ justify-content: center; }
}