/* ============================================
   SAMUEL LACERDA DA ROSA — PORTFOLIO
   Paleta: Cinza escuro / Quase preto
   ============================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #E8EAED;
  --bg-card:     #DDDFE3;
  --bg-alt:      #D2D5DA;
  --border:      #C4C7CD;
  --border-soft: #8f8f91;
  --text-1:      #1C1E21;
  --text-2:      #1C1E21;
  --text-3:      #1C1E21;
  --text-4:      #1C1E21;

  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-full: 9999px;

  --shadow:      0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.06);
  --shadow-hover:0 2px 6px rgba(0,0,0,.12), 0 8px 24px rgba(0,0,0,.09);

  --transition:  .2s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text-2);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { width: 88%; max-width: 1040px; margin-inline: auto; }

/* ── NAV ── */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: rgba(224,227,231,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav__logo {
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--text-1);
}
.nav__links { display: flex; gap: 2.25rem; }
.nav__links a {
  font-size: .875rem;
  font-weight: 400;
  color: var(--text-3);
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--text-1); }

/* ── HERO ── */
.hero {
  padding-top: 60px;
  background: var(--bg);
  min-height: 100svh;
  display: flex;
  align-items: center;
}
.hero__inner {
  padding-block: 5rem;
  max-width: 620px;
}
.hero__eyebrow {
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-1);
  margin-bottom: .875rem;
}
.hero__name {
  font-size: clamp(2.75rem, 6vw, 4.75rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -.03em;
  color: var(--text-1);
  margin-bottom: 1.25rem;
}
.hero__tagline {
  font-size: 1rem;
  color: var(--text-1);
  line-height: 1.7;
  max-width: 400px;
  margin-bottom: 2.25rem;
}
.hero__actions { display: flex; gap: .75rem; flex-wrap: wrap; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  padding: .6rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: .875rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
}
.btn--dark {
  background: var(--text-1);
  color: var(--bg);
}
.btn--dark:hover { background: var(--text-2); transform: translateY(-1px); }
.btn--outline {
  border: 1px solid var(--border);
  color: var(--text-2);
  background: transparent;
}
.btn--outline:hover { border-color: var(--text-3); transform: translateY(-1px); }

/* ── SECTIONS ── */
.section { padding-block: 5rem; }
.section--alt { background: var(--bg-alt); }

.section__eyebrow {
  font-size: .73rem;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: .5rem;
}
.section__title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -.025em;
  margin-bottom: 2.5rem;
  line-height: 1.15;
}

/* ── SOBRE ── */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: start;
}
.about__bio p {
  font-size: .97rem;
  color: var(--text-3);
  line-height: 1.8;
  margin-bottom: .875rem;
}
.about__formation { display: flex; flex-direction: column; gap: 1.25rem; }
.formation-item { display: flex; gap: 1rem; align-items: flex-start; }
.formation-item__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  border: 2px solid var(--text-4);
  flex-shrink: 0;
  margin-top: .42rem;
}
.formation-item div { display: flex; flex-direction: column; gap: .15rem; }
.formation-item strong { font-size: .92rem; font-weight: 500; color: var(--text-1); }
.formation-item span  { font-size: .83rem; color: var(--text-3); }
.formation-item small { font-size: .74rem; color: var(--text-4); }

/* ── IDIOMAS ── */
.lang__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.lang-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.lang-card__flag { font-size: 1.4rem; flex-shrink: 0; }
.lang-card__info { display: flex; flex-direction: column; gap: .1rem; flex: 0 0 120px; }
.lang-card__info strong { font-size: .92rem; font-weight: 500; color: var(--text-1); }
.lang-card__info span  { font-size: .8rem; color: var(--text-4); }
.lang-bar { flex: 1; height: 3px; background: var(--border); border-radius: var(--radius-full); overflow: hidden; }
.lang-bar__fill { height: 100%; background: var(--text-2); border-radius: var(--radius-full); }

/* ── HABILIDADES ── */
.skills__row { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.skills__group-label {
  font-size: .73rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: .875rem;
}
.skills__tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  font-size: .82rem;
  font-weight: 400;
  padding: .36rem .9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-2);
  transition: border-color var(--transition), color var(--transition);
  cursor: default;
}
.tag:hover { border-color: var(--text-3); color: var(--text-1); }
.tag--muted { background: var(--bg-alt); border-color: transparent; color: var(--text-3); }
.tag--muted:hover { background: var(--bg-card); color: var(--text-2); }

/* ── PROJETOS ── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1rem;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: .875rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.project-card__num {
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--text-4);
}
.project-card__title { font-size: 1.05rem; font-weight: 600; color: var(--text-1); letter-spacing: -.01em; }
.project-card__desc  { font-size: .88rem; color: var(--text-3); line-height: 1.7; flex: 1; }
.project-card__techs { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .25rem; }
.project-card__techs span {
  font-size: .72rem;
  font-weight: 500;
  padding: .22rem .65rem;
  border-radius: var(--radius-full);
  background: var(--bg-alt);
  color: var(--text-3);
}

/* ── CONTATO ── */
.contact__inner { max-width: 580px; }
.contact__sub { font-size: .97rem; color: var(--text-3); margin-top: -.75rem; margin-bottom: 2rem; }
.contact__cards { display: flex; flex-direction: column; gap: .75rem; }
.contact__card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-2);
  transition: border-color var(--transition), transform var(--transition);
}
.contact__card:hover { border-color: var(--text-3); transform: translateX(3px); }
.contact__card svg { color: var(--text-4); flex-shrink: 0; }
.contact__card div { display: flex; flex-direction: column; gap: .1rem; }
.contact__card span    { font-size: .75rem; color: var(--text-4); }
.contact__card strong  { font-size: .92rem; font-weight: 500; color: var(--text-1); }

/* ── FOOTER ── */
.footer { border-top: 1px solid var(--border); padding-block: 2.5rem; background: var(--bg); }
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}
.footer__name  { font-size: .88rem; font-weight: 500; color: var(--text-1); }
.footer__role  { font-size: .8rem; color: var(--text-1); }
.footer__copy  { font-size: .8rem; color: var(--text-1); }

/* ── RESPONSIVE ── */
@media (max-width: 860px) {
  .about__grid  { grid-template-columns: 1fr; }
  .skills__row  { grid-template-columns: 1fr; gap: 2rem; }
  .lang__grid   { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .nav__links   { display: none; }
  .section      { padding-block: 3.5rem; }
  .hero__inner  { padding-block: 3.5rem; }
  .projects__grid { grid-template-columns: 1fr; }
  .footer__inner  { flex-direction: column; align-items: flex-start; }
}

a:focus-visible { outline: 2px solid var(--text-1); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}