/* ========================================
   Paulo Freitas — Professional Page
   Modern, responsive CSS
   ======================================== */

:root {
  --color-bg: #0d1117;
  --color-bg-alt: #161b22;
  --color-surface: #1c2333;
  --color-border: #30363d;
  --color-text: #e6edf3;
  --color-text-muted: #8b949e;
  --color-primary: #f97316;
  --color-primary-hover: #fb923c;
  --color-accent: #3b82f6;
  --color-white: #fff;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --container-max: 1100px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

.nav__logo span {
  color: var(--color-primary);
}

.nav__logo:hover {
  color: var(--color-text);
}

.nav__menu {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav__item {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__link {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav__link:hover {
  color: var(--color-text);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-left: 8px;
}

.lang-switch__btn {
  min-width: 40px;
  height: 30px;
  border-radius: 999px;
  border: 0;
  background: transparent;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition);
}

.lang-switch__btn:hover {
  color: var(--color-text);
}

.lang-switch__btn.active {
  background: var(--color-primary);
  color: #000;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav__toggle--active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle--active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle--active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Hero ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__greeting {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.hero__name {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 12px;
}

.hero__role {
  font-size: 1.35rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: 20px;
}

.hero__description {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 480px;
  margin-bottom: 32px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__image {
  display: flex;
  justify-content: center;
}

.hero__avatar-ring {
  position: relative;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  padding: 5px;
  background: conic-gradient(from 0deg,
      var(--color-primary),
      var(--color-accent),
      var(--color-primary),
      var(--color-accent),
      var(--color-primary));
  box-shadow:
    0 0 40px rgba(249, 115, 22, 0.2),
    0 0 80px rgba(249, 115, 22, 0.08);
}

.hero__avatar-ring::before {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--color-bg);
  z-index: 0;
}

.hero__avatar {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-bg);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-white);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---- Sections ---- */
.section {
  padding: 96px 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.5px;
}

.section__title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 3px;
  margin: 16px auto 0;
}

/* ---- About ---- */
.about__content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.about__content p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.about__content a {
  color: var(--color-primary);
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.stat {
  text-align: center;
}

.stat__number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

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

/* ---- Skills ---- */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-card {
  position: relative;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  min-height: 180px;
  display: flex;
  align-items: flex-end;
  transition: border-color var(--transition), transform var(--transition);
}

.skill-card:hover {
  transform: translateY(-4px);
}

.skill-card:hover .skill-card__bg {
  filter: blur(3px);
}

.skill-card__bg {
  position: absolute;
  top: -10%;
  left: 54%;
  width: 75%;
  opacity: 0.1;
  pointer-events: none;
  filter: blur(0);
}

.skill-card__content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.skill-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.skill-card__items {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---- Projects ---- */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
  color: var(--color-text);
  text-decoration: none;
}

.project-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  color: var(--color-text);
}

.project-card--featured {
  grid-column: span 3;
  background: linear-gradient(135deg, var(--color-surface), rgba(249, 115, 22, 0.07));
  border-color: rgba(249, 115, 22, 0.3);
}

.project-card__header {
  margin-bottom: 12px;
}

.project-card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  background: rgba(249, 115, 22, 0.1);
  padding: 4px 10px;
  border-radius: 4px;
}

.project-card__title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.project-card__desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
  flex: 1;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-card__tech span {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  color: var(--color-text-muted);
}

.projects__more {
  text-align: center;
  margin-top: 40px;
}

/* ---- Contact ---- */
.contact__text {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto 40px;
}

.contact__links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
  color: var(--color-text);
  text-decoration: none;
}

.contact-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  color: var(--color-text);
}

.contact-card__icon {
  width: 32px;
  height: 32px;
}

.contact-card__label {
  font-weight: 600;
  font-size: 1rem;
}

.contact-card__user {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  word-break: break-all;
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer__link {
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.footer__link:hover {
  opacity: 0.8;
}

.footer__icon {
  width: 40px;
  height: 40px;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .hero__content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__text {
    order: 2;
  }

  .hero__image {
    order: 1;
  }

  .hero__description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__name {
    font-size: 2.5rem;
  }

  .hero__avatar-ring {
    width: 300px;
    height: 300px;
  }

  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects__grid {
    grid-template-columns: 1fr 1fr;
  }

  .project-card--featured {
    grid-column: span 2;
  }

  .about__stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact__links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .nav__menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
  }

  .nav__menu--open {
    display: flex;
    gap: 24px;
  }

  .nav__link {
    font-size: 1.15rem;
  }

  .nav__toggle {
    display: flex;
    order: 3;
  }

  .lang-switch {
    order: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 0;
  }

  .lang-switch__btn {
    min-width: 54px;
    height: 40px;
    font-size: 1rem;
  }

  .hero__name {
    font-size: 2rem;
  }

  .hero__role {
    font-size: 1.1rem;
  }

  .hero__avatar-ring {
    width: 250px;
    height: 250px;
  }

  .section {
    padding: 64px 0;
  }

  .section__title {
    font-size: 1.6rem;
  }

  .skills__grid,
  .projects__grid,
  .contact__links {
    grid-template-columns: 1fr;
  }

  .project-card--featured {
    grid-column: span 1;
  }

  .about__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat__number {
    font-size: 1.5rem;
  }

  .footer__content {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}