/* ===== Tokens de tema ===== */
:root {
  --accent: #6366f1;
  --accent-2: #22d3ee;
  --accent-grad: linear-gradient(120deg, #6366f1, #22d3ee);
  --radius: 14px;
  --maxw: 1040px;
  --nav-h: 64px;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.25);
  --transition: 0.25s ease;
}

/* Tema escuro (padrão) */
:root,
:root[data-theme="dark"] {
  --bg: #0b1120;
  --bg-soft: #0f172a;
  --card: #131d33;
  --card-hover: #182545;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(148, 163, 184, 0.16);
  --tag-bg: rgba(99, 102, 241, 0.14);
  --tag-text: #c7d2fe;
  --glow: radial-gradient(
    600px circle at 15% 0%,
    rgba(99, 102, 241, 0.18),
    transparent 45%
  ),
  radial-gradient(500px circle at 90% 10%, rgba(34, 211, 238, 0.12), transparent 45%);
}

/* Tema claro */
:root[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --card-hover: #ffffff;
  --text: #0f172a;
  --text-muted: #5b6b82;
  --border: #e2e8f0;
  --tag-bg: rgba(79, 70, 229, 0.1);
  --tag-text: #4338ca;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --glow: radial-gradient(
    600px circle at 15% 0%,
    rgba(99, 102, 241, 0.12),
    transparent 45%
  ),
  radial-gradient(500px circle at 90% 10%, rgba(34, 211, 238, 0.1), transparent 45%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg);
  background-image: var(--glow);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.65;
  transition: background-color var(--transition), color var(--transition);
}

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

/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-grad);
  box-shadow: 0 0 12px var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover {
  color: var(--text);
  background: var(--card);
}

.nav-links a.active {
  color: var(--text);
  background: var(--tag-bg);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  height: 38px;
  min-width: 38px;
  padding: 0 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: transform var(--transition), background var(--transition),
    border-color var(--transition);
}

.icon-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: var(--card-hover);
}

.nav-toggle {
  display: none;
}

/* ===== Layout ===== */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 64px 0 8px;
}

.section-title {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  padding: 48px 0 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

/* Grade sutil de fundo só no hero, para dar textura/profundidade */
.hero::before {
  content: "";
  position: absolute;
  inset: -24px 0;
  z-index: -1;
  background-image: linear-gradient(
      to right,
      var(--border) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(
    ellipse 70% 60% at 50% 40%,
    #000 40%,
    transparent 100%
  );
  mask-image: radial-gradient(
    ellipse 70% 60% at 50% 40%,
    #000 40%,
    transparent 100%
  );
  opacity: 0.5;
}

.hero-text {
  max-width: 760px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-2);
  background: var(--tag-bg);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero-eyebrow .pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(34, 197, 94, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0);
  }
}

.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 14px;
}

.hero h1 .grad {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero .role {
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  font-weight: 600;
  color: var(--accent-2);
  margin-bottom: 16px;
}

.hero .tagline {
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 56ch;
  margin: 0 auto 32px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), border-color var(--transition);
}

.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.45);
}

.btn-ghost {
  background: var(--card);
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: var(--card-hover);
}

/* ===== Cards ===== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), border-color var(--transition),
    background var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  background: var(--card-hover);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.card-title {
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--text);
}

.card-date {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-2);
  background: var(--tag-bg);
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.card p {
  color: var(--text-muted);
}

.project-card {
  display: flex;
  flex-direction: column;
}

.project-card strong {
  color: var(--text);
}

.project-link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 14px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-2);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}

.project-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.about-text {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ===== Grids ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.grid-2 .card {
  margin-bottom: 0;
}

/* ===== Tags ===== */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: transform var(--transition), border-color var(--transition);
}

.tag:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

/* ===== Footer ===== */
.footer {
  margin-top: 72px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
}

.footer h3 {
  font-size: 1.3rem;
  font-weight: 800;
}

.footer .social {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.footer .social a {
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  transition: color var(--transition), border-color var(--transition),
    transform var(--transition);
}

.footer .social a:hover {
  color: var(--text);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.footer .copyright {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===== Reveal on scroll ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== Responsivo ===== */
@media (max-width: 860px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px 16px;
    transform: translateY(-140%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow);
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-links a {
    padding: 12px;
    border-radius: 10px;
  }
  .nav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 420px) {
  .cta-row {
    flex-direction: column;
  }
  .btn {
    justify-content: center;
  }
}