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

:root {
  --bg: #020204;
  --text: #f2f2f7;
  --muted: rgba(242, 242, 247, 0.55);
  --subtle: rgba(242, 242, 247, 0.3);

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);

  --radius: 20px;
  --blur: saturate(180%) blur(28px);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "DM Sans", system-ui;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* 
layout
*/
section {
  max-width: 1100px;
  margin: auto;
  padding: 120px 24px;
}

.container-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* 
navegação
*/
nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 4px;
  padding: 6px;
  border-radius: 999px;
  z-index: 9999;
  background: rgba(10, 10, 15, 0.6);
  backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
}

nav a {
  padding: 6px 14px;
  text-decoration: none;
  color: var(--muted);
  border-radius: 999px;
  font-size: 13px;
}

nav a.active,
nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
}

/* 
seção principal / hero
*/
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-title {
  font-size: clamp(48px, 8vw, 90px);
  letter-spacing: -0.04em;
}

.hero-subtitle {
  color: var(--muted);
  margin: 20px 0 40px;
}

.btn {
  padding: 12px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 14px;
}

.btn-primary {
  background: #fff;
  color: #000;
}

.btn-glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text);
}

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* 
glass
*/
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}

/* 
sobre mim
*/
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 700px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

.card {
  padding: 32px;
}

/* 
estudo
*/
.study {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.study .glass {
  padding: 22px 24px;
  transition: transform 0.2s;
}

.study .glass:hover {
  transform: translateY(-5px);
}

.study .glass h3 {
  margin-bottom: 10px;
}

.study .glass em {
  display: block;
  font-style: italic;
  margin: 4px 0 10px;
  color: rgba(242, 242, 247, 0.7);
  font-size: 14px;
}

.study .glass p {
  margin: 0;
}

.tags {
  margin-top: 16px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
}

/*
contatos
*/
.contact-links {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.contact-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: rgba(242, 242, 247, 0.8);
  font-size: 14px;
  transition: 0.2s;
}

.contact-links a:hover {
  color: #fff;
}

.contact-links i {
  font-size: 16px;
  opacity: 0.8;
}

/* 
rodapé
*/
footer {
  text-align: center;
  padding: 20px 0 32px;
  color: var(--subtle);
  font-size: 12px;
  opacity: 0.7;
}