/* =========================================================
   DEV FULLSTACK — Portfolio
   Dark theme · neon purple/blue · modern SaaS aesthetic
   ========================================================= */

:root {
  --bg: #0a0a14;
  --bg-2: #0f0f1f;
  --surface: #12122099;
  --surface-solid: #14142a;
  --border: #ffffff14;
  --border-strong: #ffffff22;
  --fg: #e9eaf2;
  --muted: #a0a3b8;
  --primary: #8b5cf6;       /* neon purple */
  --primary-2: #a78bfa;
  --accent: #38bdf8;         /* neon blue */
  --accent-2: #22d3ee;
  --gradient: linear-gradient(135deg, #8b5cf6 0%, #38bdf8 100%);
  --gradient-soft: linear-gradient(135deg, rgba(139,92,246,.18), rgba(56,189,248,.12));
  --shadow-glow: 0 10px 40px -10px rgba(139,92,246,.45);
  --shadow-card: 0 20px 60px -30px rgba(0,0,0,.6);
  --radius: 16px;
  --radius-sm: 10px;
  --container: 1200px;
}

html, body {
  overflow-x: hidden;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(139,92,246,.18), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(56,189,248,.12), transparent 60%);
}

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

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
h1 { font-size: clamp(2.2rem, 5vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 3rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.05rem; }
p { color: var(--muted); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }

.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.muted { color: var(--muted); }
.lead { font-size: 1.125rem; color: var(--muted); margin-top: 20px; max-width: 560px; }

/* CHIP */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; color: var(--fg);
  backdrop-filter: blur(10px);
}
.chip .dot { width: 8px; height: 8px; border-radius: 999px; background: var(--primary); box-shadow: 0 0 12px var(--primary); }
.chip .dot.pulse { animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 22px; border-radius: 12px;
  font-weight: 600; font-size: 0.95rem;
  cursor: pointer; transition: all .25s ease;
  border: 1px solid transparent;
}
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }
.btn-hero {
  background: var(--gradient);
  color: white;
  box-shadow: var(--shadow-glow);
}
.btn-hero:hover { transform: translateY(-2px); box-shadow: 0 14px 50px -10px rgba(139,92,246,.65); }
.btn-outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--fg);
}
.btn-outline:hover { border-color: var(--primary); background: rgba(139,92,246,.08); box-shadow: 0 0 0 4px rgba(139,92,246,.08); }

/* NAVBAR */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: all .3s ease;
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  background: rgba(10,10,20,.7);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.1rem;
}
.brand-mark {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--gradient);
  font-family: 'JetBrains Mono', monospace; font-size: 13px; color: white;
  box-shadow: var(--shadow-glow);
}
.nav-links { display: flex; gap: 28px; }
.nav-links a { font-size: 0.9rem; color: var(--muted); transition: color .2s; position: relative; }
.nav-links a:hover { color: var(--fg); }
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0;
  background: var(--gradient); transition: width .3s ease;
}
.nav-links a:hover::after { width: 100%; }

.nav-toggle { display: none; background: none; border: 0; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--fg); border-radius: 2px; transition: all .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none; flex-direction: column; gap: 14px;
  padding: 20px 24px 28px;
  background: rgba(10,10,20,.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a { color: var(--fg); font-size: 1rem; }

/* HERO */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
}
.grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(139,92,246,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139,92,246,.06) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-glow {
  position: absolute; top: -10%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(139,92,246,.35), transparent 60%);
  filter: blur(60px); pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center;
}
.hero-text h1 { margin-top: 24px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-cta.center { justify-content: center; }
.hero-stats {
  margin-top: 48px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  max-width: 420px;
}
.stat-v { font-family: 'Space Grotesk', sans-serif; font-size: 1.6rem; font-weight: 700; }
.stat-l { font-size: 0.78rem; color: var(--muted); margin-top: 4px; }

.hero-image { position: relative; }
.hero-image-glow {
  position: absolute; inset: -30px;
  background: var(--gradient);
  opacity: .25; filter: blur(60px); border-radius: 50%;
  pointer-events: none;
}
.floating-chip {
  position: absolute; bottom: -14px; left: -14px;
  background: rgba(20,20,42,.95) !important;
  box-shadow: var(--shadow-card);
}

/* CARD-TECH (universal frame) */
.card-tech {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.card-tech img { border-radius: 12px; width: 100%; height: auto; }

.float { animation: float 6s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* SECTION HEAD */
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head .chip { margin-bottom: 16px; }
.section-head h2 { margin-bottom: 14px; }

/* TWO-COL (sobre) */
.two-col {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.two-col h2 { margin: 16px 0 20px; }
.two-col p + p { margin-top: 16px; }
.two-col strong { color: var(--fg); }

.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.mini-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: all .3s ease;
}
.mini-card:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: var(--shadow-glow); }
.mini-icon { font-size: 1.6rem; margin-bottom: 12px; }
.mini-card h4 { margin-bottom: 6px; }
.mini-card p { font-size: 0.9rem; }

/* STACK */
.stack-grid {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px;
}
.stack-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  font-weight: 600;
  transition: all .3s ease;
}
.stack-item:hover { transform: translateY(-4px); border-color: var(--primary); background: var(--gradient-soft); }
.stack-icon { font-size: 2rem; margin-bottom: 10px; }

/* PROJECTS */
.projects { display: flex; flex-direction: column; gap: 40px; }
.project {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.project.reverse .project-img { order: 2; }
.project-img {
  position: relative; min-height: 320px;
  overflow: hidden;
}
.project-img img {
 
  transition: transform .6s ease;
}
.project-img:hover img { transform: scale(1.05); }

.project-body { padding: 36px; display: flex; flex-direction: column; }
.project-meta { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.project-no { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--primary); }
.project-tech { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
.project-tech span {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  background: var(--surface); border: 1px solid var(--border);
  padding: 3px 9px; border-radius: 999px;
}
.project h3 { margin-bottom: 12px; font-size: 1.6rem; }
.project-short { margin-bottom: 22px; }
.ps-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 22px;
}
.ps-label {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  text-transform: uppercase; letter-spacing: .1em;
  margin-bottom: 6px;
}
.ps-label.problem { color: var(--primary); }
.ps-label.solution { color: var(--accent); }
.ps-grid p { font-size: 0.88rem; }
.highlights { list-style: none; margin-bottom: 26px; }
.highlights li {
  display: flex; gap: 10px; font-size: 0.9rem; color: var(--fg);
  padding: 4px 0;
}
.highlights li::before {
  content: '✓'; color: var(--primary); font-weight: 700;
}
.project-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; }

/* DIFERENCIAIS */
.diff-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.diff-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px; position: relative; overflow: hidden;
  transition: all .3s ease;
}
.diff-card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: var(--shadow-glow); }
.diff-card::before {
  content: ''; position: absolute; inset: 0;
  background: var(--gradient-soft); opacity: 0;
  transition: opacity .3s;
}
.diff-card:hover::before { opacity: 1; }
.diff-card > * { position: relative; }
.diff-num {
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: var(--primary); margin-bottom: 14px;
}
.diff-card h4 { margin-bottom: 10px; }
.diff-card p { font-size: 0.9rem; }

/* CTA FINAL */
.cta-final {
  position: relative; overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 80px 32px; text-align: center;
}
.cta-final h2 { margin: 18px 0 16px; }
.cta-final .muted { max-width: 520px; margin: 0 auto; }

/* CONTACT */
.contact-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px; text-align: center;
  transition: all .3s ease;
}
.contact-card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: var(--shadow-glow); background: var(--gradient-soft); }
.contact-icon { font-size: 1.8rem; margin-bottom: 12px; }
.contact-card h4 { margin-bottom: 4px; }
.contact-card p { font-size: 0.85rem; }

/* FOOTER */
.footer { border-top: 1px solid var(--border); padding: 40px 0; margin-top: 40px; }
.footer-inner {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px;
}
.footer-links { display: flex; gap: 22px; }
.footer-links a { color: var(--muted); font-size: 0.9rem; }
.footer-links a:hover { color: var(--fg); }
.copy { font-size: 0.85rem; color: var(--muted); }

/* REVEAL on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: all .8s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* RESPONSIVE */
@media (max-width: 980px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 130px 0 70px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .two-col { grid-template-columns: 1fr; gap: 40px; }
  .stack-grid { grid-template-columns: repeat(3, 1fr); }
  .diff-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .project, .project.reverse { grid-template-columns: 1fr; }
  .project.reverse .project-img { order: 0; }
  .project-img { min-height: 240px; }
  .section { padding: 72px 0; }
}
@media (max-width: 560px) {
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .about-cards { grid-template-columns: 1fr; }
  .ps-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 14px; }
  .project-body { padding: 24px; }
  .cta-final { padding: 60px 20px; }
}