/* ===== VARIÁVEIS CSS ===== */
:root {
  --primary-color: #0066ff;
  --primary-dark: #0052cc;
  --primary-light: #3385ff;
  --secondary-color: #64ffda;
  --accent-color: #ff6b6b;
  --dark-bg: #0a0e1a;
  --card-bg: rgba(15, 23, 42, 0.9);
  --card-hover: rgba(30, 41, 59, 0.95);
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-accent: #e2e8f0;
  --glass-bg: rgba(15, 23, 42, 0.8);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-primary: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-code: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ===== RESET E BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--dark-bg);
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Overlay escuro para melhor legibilidade */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(10, 14, 26, 0.9) 0%,
    rgba(15, 23, 42, 0.8) 50%,
    rgba(30, 41, 59, 0.9) 100%
  );
  z-index: -1;
  pointer-events: none;
}

/* ===== BACKGROUNDS ESPECÍFICOS ===== */
body.home {
  background-image: url('https://source.unsplash.com/1920x1080/?technology,abstract');
}

body.sobre {
  background-image: url('https://source.unsplash.com/1920x1080/?cybersecurity,matrix');
}

body.projetos {
  background-image: url('https://source.unsplash.com/1920x1080/?programming,code');
}

body.certificados {
  background-image: url('https://source.unsplash.com/1920x1080/?education,achievement');
}

body.contato {
  background-image: url('https://source.unsplash.com/1920x1080/?network,connection');
}

/* ===== HEADER MODERNO ===== */
header {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

header h1 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

/* ===== NAVEGAÇÃO ELEGANTE ===== */
nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

nav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: var(--transition);
}

nav a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

nav a:hover::before {
  left: 100%;
}

nav a.active {
  color: var(--primary-color);
  background: rgba(0, 102, 255, 0.1);
  border: 1px solid rgba(0, 102, 255, 0.3);
}

/* ===== SEÇÕES COM GLASSMORPHISM ===== */
section {
  padding: clamp(2rem, 5vw, 4rem);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  margin: 2rem auto;
  max-width: 1200px;
  border-radius: var(--border-radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--secondary-color),
    transparent
  );
}

/* ===== TÍTULOS MODERNOS ===== */
h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  letter-spacing: -0.02em;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

h3 {
  color: var(--text-accent);
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

/* ===== GRID RESPONSIVO AVANÇADO ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

/* ===== CARDS COM EFEITOS AVANÇADOS ===== */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(100, 255, 218, 0.05),
    transparent
  );
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  background: var(--card-hover);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.card:hover::before {
  left: 100%;
}

.card h3 {
  color: var(--primary-light);
  margin-bottom: 1rem;
}

.card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* ===== BOTÕES MODERNOS ===== */
.button-download,
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
}

.button-download::before,
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition);
}

.button-download:hover,
.btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(0, 102, 255, 0.4);
}

.button-download:hover::before,
.btn:hover::before {
  left: 100%;
}

.button-download:active,
.btn:active {
  transform: translateY(-1px) scale(1.02);
}

/* ===== ÍCONES SOCIAIS ANIMADOS ===== */
.social-icons {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.social-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-size: 1.3rem;
  text-decoration: none;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.social-icons a::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  transition: var(--transition);
  transform: translate(-50%, -50%);
  z-index: -1;
}

.social-icons a:hover {
  color: var(--text-primary);
  transform: translateY(-5px) scale(1.1);
  box-shadow: var(--shadow-md);
}

.social-icons a:hover::before {
  width: 100%;
  height: 100%;
}

/* ===== FOOTER ELEGANTE ===== */
footer {
  text-align: center;
  padding: 3rem 2rem 2rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text-secondary);
  margin-top: 3rem;
  border-top: 1px solid var(--glass-border);
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

footer p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

/* ===== LISTAS ESTILIZADAS ===== */
ul li {
  margin-bottom: 0.8rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
}

ul li::before {
  content: '▶';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-size: 0.8rem;
}

/* ===== ANIMAÇÕES E TRANSIÇÕES ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

section {
  animation: fadeInUp 0.6s ease-out;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }

/* ===== RESPONSIVIDADE AVANÇADA ===== */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }
  
  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  nav a {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }
  
  section {
    margin: 1rem;
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .social-icons {
    gap: 1rem;
  }
  
  .social-icons a {
    width: 45px;
    height: 45px;
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  header h1 {
    font-size: 1.5rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .button-download,
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }
}

/* ===== EFEITOS DE SCROLL ===== */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
  
  section {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out forwards;
  }
}

/* ===== TEMA ESCURO APRIMORADO ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --text-secondary: #94a3b8;
    --card-bg: rgba(15, 23, 42, 0.95);
  }
}

/* ===== ACESSIBILIDADE ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

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