:root {
  --bg: #070b14;
  --bg-elevated: #0c1322;
  --bg-card: #101a2f;
  --border: rgba(144, 180, 255, 0.2);
  --text: #f3f7ff;
  --text-muted: #a1b0cc;
  --accent: #6ea8fe;
  --accent-soft: rgba(110, 168, 254, 0.16);
  --accent-glow: rgba(96, 165, 250, 0.35);
  --success: #4ade80;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", monospace;
  --radius: 12px;
  --radius-lg: 24px;
  --header-h: 72px;
  --shadow-soft: 0 14px 40px rgba(3, 8, 20, 0.35);
  --shadow-glow: 0 18px 50px rgba(96, 165, 250, 0.2);
  --shadow-card: 0 16px 36px rgba(3, 12, 30, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background:
    radial-gradient(850px 500px at 5% -10%, rgba(110, 168, 254, 0.11), transparent 72%),
    radial-gradient(700px 420px at 95% 0%, rgba(99, 102, 241, 0.14), transparent 72%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(1160px, 92vw);
  margin-inline: auto;
}

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

img {
  max-width: 100%;
  display: block;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7, 11, 20, 0.72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(173, 201, 255, 0.12);
  box-shadow: 0 8px 30px rgba(1, 5, 16, 0.28);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 0.15rem;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-mark {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.logo-text {
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  position: relative;
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.25s, opacity 0.25s;
}

.nav-links a:hover {
  color: var(--text);
  opacity: 1;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.btn-nav {
  padding: 0.5rem 1rem !important;
  background: linear-gradient(135deg, rgba(110, 168, 254, 0.24), rgba(110, 168, 254, 0.1));
  color: var(--accent) !important;
  border-radius: 8px;
  font-weight: 600;
  border: 1px solid rgba(110, 168, 254, 0.35);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14);
}

.btn-nav:hover {
  background: var(--accent);
  color: #fff !important;
}

.btn-nav::after {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 3.4rem) 0 4.5rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(99, 102, 241, 0.14), transparent),
    radial-gradient(ellipse 40% 30% at 0% 80%, rgba(110, 168, 254, 0.1), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  background: linear-gradient(160deg, rgba(16, 23, 41, 0.86), rgba(13, 20, 35, 0.58));
  border: 1px solid rgba(173, 201, 255, 0.12);
  border-radius: 28px;
  padding: clamp(1.7rem, 3vw, 2.8rem);
  box-shadow: var(--shadow-soft);
}

.hero-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  margin-bottom: 1.35rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.45rem, 5.2vw, 4.1rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.03em;
  max-width: 14ch;
  text-wrap: balance;
}

.hero h1 em {
  font-style: normal;
  color: transparent;
  background: linear-gradient(120deg, #97c1ff 15%, #6ea8fe 45%, #8b8cff 90%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-desc {
  margin-top: 1.35rem;
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.92rem 1.6rem;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: background 0.25s, transform 0.2s, box-shadow 0.25s, border-color 0.25s;
}

.btn-primary {
  background: linear-gradient(140deg, #4f93ff 0%, #7cb2ff 100%);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
  border: 1px solid rgba(173, 201, 255, 0.28);
}

.btn-primary:hover {
  filter: brightness(1.05);
  transform: translateY(-2px);
  box-shadow: 0 18px 38px rgba(96, 165, 250, 0.3);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.01);
  color: var(--text);
  border: 1px solid var(--border);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(110, 168, 254, 0.06);
}

.btn-full {
  width: 100%;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 3rem;
  padding-top: 2.1rem;
  border-top: 1px solid rgba(173, 201, 255, 0.16);
  list-style: none;
}

.hero-stats li {
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 0.58rem 0.95rem;
  border-right: none;
  background: rgba(113, 158, 243, 0.08);
  border: 1px solid rgba(173, 201, 255, 0.15);
  border-radius: 999px;
}

.hero-stats strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 0.15rem;
}

.hero-stats li:last-child {
  border-right: none;
}

/* Sections */
.section {
  padding: 6rem 0;
}

.section:nth-of-type(even) {
  background: linear-gradient(180deg, rgba(122, 162, 255, 0.04), rgba(255, 255, 255, 0));
}

.section-header {
  margin-bottom: 3rem;
  max-width: 40ch;
}

.section-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  opacity: 0.95;
}

.section-header h2 {
  font-size: clamp(1.95rem, 3.3vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-wrap: balance;
}

.section-header p {
  margin-top: 0.5rem;
  color: var(--text-muted);
}

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.6rem;
}

.card {
  background: linear-gradient(165deg, rgba(16, 26, 47, 0.88), rgba(12, 19, 34, 0.9));
  border: 1px solid rgba(173, 201, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.card:hover {
  border-color: rgba(110, 168, 254, 0.48);
  transform: translateY(-4px);
  box-shadow: 0 20px 36px rgba(4, 10, 25, 0.35);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: 10px;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.card-icon svg {
  width: 26px;
  height: 26px;
}

.card h3 {
  font-size: 1.22rem;
  margin-bottom: 0.55rem;
  letter-spacing: -0.01em;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Portfolio */
.portfolio {
  background:
    radial-gradient(500px 250px at 100% 20%, rgba(110, 168, 254, 0.11), transparent 70%),
    var(--bg-elevated);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.6rem;
}

.project-card {
  background: linear-gradient(165deg, rgba(16, 26, 47, 0.92), rgba(12, 19, 34, 0.93));
  border: 1px solid rgba(173, 201, 255, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.project-card:hover {
  border-color: rgba(110, 168, 254, 0.45);
  transform: translateY(-4px);
  box-shadow: 0 22px 38px rgba(6, 10, 20, 0.38);
}

.project-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--accent-soft) 0%, var(--bg) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(173, 201, 255, 0.1);
}

.project-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.project-tags span {
  font-size: 0.7rem;
  font-family: var(--mono);
  padding: 0.2rem 0.5rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
}

.project-card h3 {
  font-size: 1.16rem;
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.project-card a.project-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent);
}

.project-card a.project-link:hover {
  text-decoration: underline;
}

/* Sobre */
.sobre-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.2rem;
  align-items: center;
}

.sobre-text h2 {
  font-size: clamp(1.95rem, 3.2vw, 2.6rem);
  margin: 0.3rem 0 1rem;
  letter-spacing: -0.03em;
}

.sobre-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.sobre-list {
  list-style: none;
  margin-top: 1.5rem;
}

.sobre-list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.sobre-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.code-block {
  background: linear-gradient(170deg, rgba(16, 26, 47, 0.95), rgba(12, 19, 34, 0.9));
  border: 1px solid rgba(173, 201, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.8;
  box-shadow: var(--shadow-soft);
}

.code-line {
  display: block;
}

.code-line .kw {
  color: #93c5fd;
}

.code-line .str {
  color: var(--success);
}

.code-cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Contato */
.contato-wrap {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: linear-gradient(170deg, rgba(16, 26, 47, 0.9), rgba(12, 19, 34, 0.85));
  border: 1px solid rgba(173, 201, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  box-shadow: var(--shadow-soft);
}

.form-row label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid rgba(173, 201, 255, 0.14);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(110, 168, 254, 0.22);
}

.form-row textarea {
  resize: vertical;
  min-height: 100px;
}

.form-hint {
  font-size: 0.9rem;
  color: var(--text-muted);
  min-height: 1.25em;
}

.form-hint.success {
  color: var(--success);
}

.contato-info p {
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  background: rgba(173, 201, 255, 0.03);
  border: 1px solid rgba(173, 201, 255, 0.12);
  border-radius: 14px;
  padding: 0.9rem 1rem;
}

.contato-info a {
  color: var(--accent);
}

.contato-info a:hover {
  text-decoration: underline;
}

.contato-note {
  font-size: 0.8rem !important;
  opacity: 0.7;
}

.contato-note code {
  font-family: var(--mono);
  font-size: 0.75rem;
  background: var(--bg-card);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

/* Footer */
.footer {
  padding: 2.4rem 0;
  border-top: 1px solid rgba(173, 201, 255, 0.12);
  background: rgba(122, 162, 255, 0.02);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.logo-footer .logo-mark {
  font-size: 1rem;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
  will-change: opacity, transform;
}

.reveal.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Light mode */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f8ff;
    --bg-elevated: #edf3ff;
    --bg-card: #ffffff;
    --border: rgba(88, 120, 186, 0.2);
    --text: #17213a;
    --text-muted: #4e6088;
    --accent: #2f6bff;
    --accent-soft: rgba(47, 107, 255, 0.1);
    --accent-glow: rgba(47, 107, 255, 0.2);
    --shadow-soft: 0 14px 36px rgba(43, 71, 128, 0.12);
    --shadow-card: 0 14px 30px rgba(43, 71, 128, 0.12);
    --shadow-glow: 0 16px 32px rgba(47, 107, 255, 0.22);
  }

  body {
    background:
      radial-gradient(850px 500px at 5% -10%, rgba(85, 133, 255, 0.11), transparent 72%),
      radial-gradient(700px 420px at 95% 0%, rgba(132, 110, 255, 0.09), transparent 72%),
      var(--bg);
  }

  .header {
    background: rgba(245, 248, 255, 0.82);
    border-bottom: 1px solid rgba(88, 120, 186, 0.2);
  }

  .hero-content,
  .card,
  .project-card,
  .code-block,
  .form {
    background: linear-gradient(170deg, rgba(255, 255, 255, 0.95), rgba(244, 249, 255, 0.9));
  }

  .btn-outline {
    background: rgba(47, 107, 255, 0.04);
  }

  .hero-stats li {
    background: rgba(47, 107, 255, 0.08);
  }

  .portfolio {
    background:
      radial-gradient(500px 250px at 100% 20%, rgba(47, 107, 255, 0.1), transparent 70%),
      var(--bg-elevated);
  }

  .footer {
    background: rgba(47, 107, 255, 0.03);
  }

  .nav-links {
    background: rgba(245, 248, 255, 0.98);
  }
}

/* Mobile */
@media (max-width: 768px) {
  .section {
    padding: 4.8rem 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem;
    background: rgba(18, 21, 28, 0.96);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links li {
    border-bottom: 1px solid var(--border);
  }

  .nav-links a {
    display: block;
    padding: 1rem;
  }

  .sobre-grid,
  .contato-wrap {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .hero-stats li {
    border-bottom: none;
    padding: 0.75rem 1rem;
  }

  .hero-stats li:last-child {
    padding-bottom: 0.75rem;
  }

  .hero-content {
    border-radius: 22px;
  }

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

@media (max-width: 768px) and (prefers-color-scheme: light) {
  .nav-links {
    background: rgba(245, 248, 255, 0.98);
  }
}

/* Chat widget */
.chat-widget {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
}

.chat-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.chat-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow), 0 8px 24px rgba(96, 165, 250, 0.25);
}

.chat-toggle[aria-expanded="true"] .chat-toggle-label {
  display: none;
}

.chat-panel {
  width: min(360px, calc(100vw - 2rem));
  height: min(480px, calc(100vh - 8rem));
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.chat-panel[hidden] {
  display: none !important;
}

.chat-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.chat-header strong {
  display: block;
  font-size: 0.95rem;
}

.chat-header span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.chat-close {
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.chat-close:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.chat-bubble {
  max-width: 88%;
  padding: 0.65rem 0.85rem;
  border-radius: 14px;
  font-size: 0.875rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.chat-bubble--bot {
  align-self: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
}

.chat-bubble--user {
  align-self: flex-end;
  background: var(--accent);
  color: #0a1628;
  font-weight: 500;
}

.chat-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0 1rem 0.65rem;
}

.chat-quick button {
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.chat-quick button:hover {
  background: rgba(110, 168, 254, 0.28);
}

.chat-form {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
}

.chat-form input {
  flex: 1;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.875rem;
}

.chat-form input:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.chat-send {
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: #0a1628;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
}

.chat-send:hover {
  filter: brightness(1.08);
}