/* ============================================================
   Design system — Portfólio Gustavo Ripka
   Paleta C: Âmbar Teal. Vanilla, sem libs.
   ============================================================ */

:root {
  --bg: #faf9f5;
  --surface: #ffffff;
  --surface-2: #f1efe9;
  --text: #1c1917;
  --text-soft: #57534e;
  --border: #e7e5e4;
  --accent: #d97706;
  --accent-2: #0d9488;
  --accent-soft: #fdf1dd;
  --accent2-soft: #d9f3f0;
  --edge: #3f3a36;
  --shadow: 0 10px 30px rgba(28, 25, 23, 0.10);
  --shadow-sm: 0 2px 8px rgba(28, 25, 23, 0.08);
  --radius: 12px;
  --radius-lg: 20px;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;
  --max-width: 1100px;
  --nav-h: 64px;
}

:root[data-theme="dark"] {
  --bg: #0f1113;
  --surface: #171a1f;
  --surface-2: #1f2329;
  --text: #f1f5f4;
  --text-soft: #9aa4a1;
  --border: #262b2f;
  --accent: #fbbf24;
  --accent-2: #2dd4bf;
  --accent-soft: #3a2f12;
  --accent2-soft: #0f3230;
  --edge: #8b9691;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background .3s, color .3s;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.2rem; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
section { padding: 60px 0; }
.section-label {
  font-family: var(--font-mono);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--accent);
  margin-bottom: 8px;
}
.section-title { margin-bottom: 40px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ============ NAV ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}
.nav.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }
.nav .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; }
.nav-logo { font-weight: 800; font-size: 1.2rem; color: var(--text); letter-spacing: .02em; }
.nav-logo:hover { text-decoration: none; }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 24px; list-style: none; }
.nav-links a { color: var(--text-soft); font-weight: 500; font-size: .95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); text-decoration: none; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.icon-btn {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; color: var(--text); cursor: pointer;
  transition: border-color .2s, color .2s;
}
.icon-btn.lang-btn {
  width: auto; gap: 6px; padding: 0 12px;
  font-weight: 700; font-size: .8rem; letter-spacing: .04em;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.nav-toggle { display: none; }
@media (max-width: 768px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 8px 20px 16px;
    box-shadow: var(--shadow);
  }
  .nav-links[hidden] { display: none; }
  .nav-links a { display: block; padding: 12px 0; width: 100%; }
}

/* ============ HERO ============ */
.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(85vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding: 40px 0 20px;
}
.hero-graph {
  position: absolute;
  inset: 0;
  left: 50%;
  width: 50%;
  height: 100%;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { margin-bottom: 16px; }
.hero h1 .accent { color: var(--accent); }
.typing { color: var(--accent-2); }
.typing-wrap { display: inline; }
.typing::after {
  content: "|";
  animation: caret 1s steps(1) infinite;
  color: var(--accent);
}
@keyframes caret { 50% { opacity: 0; } }
.hero p.lead { color: var(--text-soft); max-width: 640px; margin-bottom: 28px; font-size: 1.05rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 28px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 12px;
  font-weight: 600; font-size: .95rem; cursor: pointer;
  border: 1px solid transparent; transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { box-shadow: 0 8px 24px color-mix(in srgb, var(--accent) 40%, transparent); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn-green { background: var(--accent-2); color: var(--bg); border-color: var(--accent-2); }
.btn-green:hover { filter: brightness(1.15); }

.socials { display: flex; gap: 10px; }
.socials a {
  width: 42px; height: 42px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; color: var(--text-soft);
  transition: color .2s, border-color .2s, transform .2s;
}
.socials a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.socials svg { width: 20px; height: 20px; }

/* ============ CARROSSEL ============ */
.carousel { position: relative; }
.carousel-viewport { overflow: hidden; border-radius: var(--radius-lg); }
.carousel-track { display: flex; transition: transform .5s ease; }
.carousel-slide {
  flex: 0 0 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 64px 32px 32px;
  min-height: 220px;
  display: flex; flex-direction: column; justify-content: center;
  position: relative;
}
.carousel-slide::before {
  content: ''; display: block;
  position: absolute; top: 0; left: 0; right: 0;
  height: 48px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  z-index: 1;
}
.carousel-slide h3 { margin-bottom: 8px; }
.carousel-slide h3 span { color: var(--accent-2); font-family: var(--font-mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; display: block; margin-bottom: 6px; }
.carousel-slide p { color: var(--text-soft); margin-bottom: 16px; }
.carousel-nav { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; }
.carousel-dots { display: flex; gap: 8px; }
.carousel-dot {
  width: 10px; height: 10px; border-radius: 999px;
  background: var(--border); border: none; cursor: pointer; padding: 0;
  transition: background .3s, width .3s;
}
.carousel-dot.active { background: var(--accent); width: 24px; }
.carousel-arrows { display: flex; gap: 8px; }

/* ============ SOBRE ============ */
.about-grid { display: grid; grid-template-columns: 280px 1fr; gap: 40px; align-items: start; }
.about-photo {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.about-photo img { aspect-ratio: 1/1; object-fit: cover; }
.about-text p { color: var(--text-soft); margin-bottom: 16px; }
.about-text { min-width: 0; }
.about-text strong { font-weight: 700; }
.about-text p strong:nth-of-type(odd) { color: var(--accent-2); }
.about-text p strong:nth-of-type(even) { color: var(--accent); }

/* ============ ABOUT HIGHLIGHTS ============ */
.about-highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.highlight-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.highlight-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.highlight-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: 12px;
  color: var(--accent);
}
.highlight-card h4 { margin-bottom: 6px; font-size: 1rem; }
.highlight-card p { color: var(--text-soft); font-size: .85rem; margin: 0; }

/* ============ FULL-WIDTH MARQUEE ============ */
.stack-marquee-section {
  padding: 20px 0;
  overflow: hidden;
}
.stack-marquee-wrap {
  width: 80%;
  margin: 0 auto;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.chip {
  font-family: var(--font-mono); font-size: .75rem;
  padding: 4px 12px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-soft);
}

/* ============ HABILIDADES ============ */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.skill-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--accent); }
.skill-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); color: var(--accent);
  margin-bottom: 16px; font-size: 24px;
}
.skill-card h3 { margin-bottom: 8px; }
.skill-card p { color: var(--text-soft); font-size: .92rem; }
.skill-card .skill-tags { margin-top: 14px; }

/* ============ LINGUAGENS E FRAMEWORKS ============ */
.lang-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.lang-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.lang-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  border-color: var(--accent);
}
.lang-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}
.lang-card h4 { margin-bottom: 2px; font-size: .95rem; }
.lang-card p { color: var(--text-soft); font-size: .8rem; margin: 0; }

/* ============ PROJETOS ============ */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  transform-style: preserve-3d;
  position: relative;
}
.project-card::before {
  content: ''; display: block;
  position: absolute; top: 0; left: 0; right: 0;
  height: 48px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  z-index: 1;
}
.project-card:hover { box-shadow: var(--shadow); border-color: var(--accent); }
.project-dots {
  position: absolute; top: 14px; left: 16px;
  display: flex; align-items: center; gap: 7px; z-index: 2;
  pointer-events: none;
}
.project-dots .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  display: block;
}
.project-dots .dot-green { background: #2ed573; }
.project-dots .dot-amber { background: var(--accent); }
.project-dots .dot-black { background: var(--text); }
.project-dots .dot-arrow { color: var(--text-soft); }
.dot-arrow-wrap {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px;
  border-radius: 5px;
  background: var(--bg);
  border: 1px solid var(--border);
  align-self: center;
}
.dot-arrow-wrap .dot-arrow { display: block; width: 10px; height: 10px; }
.project-img { overflow: hidden; aspect-ratio: 16/9; }
.project-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.project-card:hover .project-img img { transform: scale(1.08); }
.project-body { padding: 64px 24px 24px; }
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; margin-top: 4px; }
.project-body h3 { margin-bottom: 8px; }
.project-body p { color: var(--text-soft); font-size: .92rem; margin-bottom: 16px; }
.project-link { font-weight: 600; font-size: .9rem; margin-top: 8px; display: inline-block; }
.link-amber {
  display: inline-flex; align-items: center;
  margin: 8px 6px 0 0; padding: 2px 12px;
  border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-weight: 600; font-size: .8rem;
}
.link-amber:hover { text-decoration: none; filter: brightness(1.05); }

#projetos-anteriores .project-card { opacity: 0.85; }
#projetos-anteriores .project-card:hover { opacity: 1; }

/* ============ CONTATO ============ */
.contact { text-align: center; }
.contact .section-title { margin-bottom: 16px; }
.contact .lead { color: var(--text-soft); max-width: 520px; margin: 0 auto 32px; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 32px; }

/* ============ FOOTER ============ */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  color: var(--text-soft);
  font-size: .85rem;
}
.footer .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }

/* ============ REVEAL ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============ STACK MARQUEE ============ */
.stack-marquee {
  margin-top: 28px;
  max-width: 100%;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.stack-track {
  display: flex;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.stack-marquee:hover .stack-track { animation-play-state: paused; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.stack-group { display: flex; gap: 14px; padding-right: 14px; }
.stack-icon {
  width: 44px; height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 12px;
  object-fit: contain;
  transition: transform .2s, border-color .2s;
}
.stack-icon:hover { transform: translateY(-3px); border-color: var(--accent); }
:root[data-theme="dark"] .stack-icon.mono,
:root[data-theme="dark"] .lang-icon.mono { filter: brightness(0) invert(1); }

/* ============ RESPONSIVO ============ */
@media (max-width: 1024px) {
  .hero-graph { left: 0; width: 100%; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { max-width: 280px; margin: 0 auto; }
  .about-text { text-align: center; }
  #sobre .section-title { text-align: center; }
  .about-highlights { grid-template-columns: repeat(2, 1fr); }
  .lang-grid { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  section { padding: 56px 0; }
  .about-highlights { grid-template-columns: 1fr; }
  .lang-grid { grid-template-columns: 1fr; }
  .typing-wrap { display: block; height: 4em; overflow: hidden; }
}

/* ============ REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .stack-track { animation: none; }
}