/* ============================================================
   Variáveis de design
   ============================================================ */
:root {
  --color-bg:        #f0f5ff;
  --color-surface:   #ffffff;
  --color-border:    #d8e4ff;
  --color-text:      #1e293b;
  --color-text-muted:#64748b;
  --color-accent:    #2563eb;
  --color-accent-hover:#1d4ed8;
  --color-accent-light:#e0ecff;
  --color-tag-bg:    #dbeafe;
  --color-tag-text:  #1d4ed8;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.05);

  --transition: 180ms ease;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;
}

/* ============================================================
   Reset & base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ============================================================
   Layout
   ============================================================ */
.container {
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}
.btn--outline:hover {
  background: var(--color-accent-light);
}

/* ============================================================
   Header
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  height: 64px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.logo-badge {
  background: var(--color-accent);
  color: #fff;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  letter-spacing: .04em;
}
.logo-sep { color: var(--color-text-muted); }
.logo-course { color: var(--color-text-muted); font-weight: 500; }
.header__logo-img {
  height: 30px;
  width: auto;
  object-fit: contain;
}

.nav { margin-left: auto; }
.nav__list {
  display: flex;
  gap: var(--space-xs);
}
.nav__link {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav__link:hover,
.nav__link.active {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.header__cta { flex-shrink: 0; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.4rem;
  margin-left: auto;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.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;
  padding: var(--space-2xl) 0;
  overflow: hidden;
  text-align: center;
  background: linear-gradient(160deg, #071540 0%, #1a3a8f 40%, #2563eb 72%, #60a5fa 100%);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 20% 110%, rgba(96,165,250,.2) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% -10%, rgba(255,255,255,.08) 0%, transparent 55%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin-inline: auto;
}

.hero__tag {
  display: inline-block;
  background: rgba(255,255,255,.15);
  color: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.25);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.hero__title {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: var(--space-sm);
  color: #ffffff;
}

.hero__sub {
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255,255,255,.8);
  margin-bottom: var(--space-sm);
}

.hero__desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,.7);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn--primary {
  background: #ffffff;
  color: var(--color-accent);
}
.hero .btn--primary:hover {
  background: #f0f5ff;
  box-shadow: 0 4px 14px rgba(255,255,255,.3);
  transform: translateY(-1px);
}
.hero .btn--outline {
  border-color: rgba(255,255,255,.5);
  color: #ffffff;
}
.hero .btn--outline:hover {
  background: rgba(255,255,255,.12);
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  padding: var(--space-2xl) 0;
}
.section--alt {
  background: #e8f0ff;
  border-top: 1px solid #d0deff;
  border-bottom: 1px solid #d0deff;
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section__tag {
  display: inline-block;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  padding: 0.25rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 0.75rem;
}

.section__desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.7;
}

/* ============================================================
   Cards grid
   ============================================================ */
.cards-grid {
  display: grid;
  gap: var(--space-md);
}
.cards-grid--2 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.cards-grid--3 { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

/* ============================================================
   Card base
   ============================================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

/* Highlight cards (Sobre) */
.card--highlight {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.6rem;
}

.card__icon {
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.card__icon svg { width: 100%; height: 100%; }

.card__title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
}

.card__text {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ============================================================
   Info block
   ============================================================ */
.info-block {
  margin-top: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}
.info-block__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.info-block__text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   Member cards
   ============================================================ */
.card--member {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  gap: var(--space-sm);
}

.member__avatar {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 3px solid var(--color-border);
  background: var(--color-bg);
  flex-shrink: 0;
}
.member__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.member__name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
}

.member__role {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-full);
}

/* ============================================================
   Document cards
   ============================================================ */
.card--doc {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.doc__icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  padding: 10px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-md);
}
.doc__icon svg { width: 100%; height: 100%; }

.doc__info { flex: 1; min-width: 0; }

.doc__type {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.doc__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc__desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
  line-height: 1.4;
}

.doc__action {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border-radius: var(--radius-full);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: background var(--transition), transform var(--transition);
}
.card--doc:hover .doc__action {
  background: var(--color-accent);
  color: #fff;
  transform: translateY(2px);
}

/* ============================================================
   Gallery
   ============================================================ */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-sm);
}

.gallery__item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-border);
  cursor: pointer;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.gallery__item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}
.gallery__item:hover img { transform: scale(1.04); }

.gallery__item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(37,99,235,.0);
  transition: background var(--transition);
}
.gallery__item:hover::after { background: rgba(37,99,235,.08); }

/* ============================================================
   Lightbox
   ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox[hidden] { display: none; }

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15,23,42,.85);
  backdrop-filter: blur(4px);
}

.lightbox__figure {
  position: relative;
  z-index: 1;
  max-width: min(90vw, 900px);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.lightbox__img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
  object-fit: contain;
}

.lightbox__caption {
  color: rgba(255,255,255,.75);
  font-size: 0.9rem;
  text-align: center;
}

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.15);
  border-radius: var(--radius-full);
  color: #fff;
  transition: background var(--transition);
}
.lightbox__close:hover { background: rgba(255,255,255,.25); }
.lightbox__close svg { width: 20px; height: 20px; }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  padding: var(--space-xl) 0;
  background: var(--color-text);
  color: rgba(255,255,255,.7);
  text-align: center;
}
.footer__inner { display: flex; flex-direction: column; gap: 0.4rem; }
.footer__project { font-weight: 600; color: #fff; font-size: 0.95rem; }
.footer__meta    { font-size: 0.85rem; }

/* ============================================================
   Responsivo
   ============================================================ */
@media (max-width: 768px) {
  .nav, .header__cta { display: none; }
  .nav__toggle { display: flex; }

  .nav.open {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    box-shadow: var(--shadow-md);
  }
  .nav.open .nav__list {
    flex-direction: column;
    width: 100%;
    gap: 0.25rem;
  }
  .nav.open .nav__link {
    display: block;
    padding: 0.65rem 1rem;
    border-radius: var(--radius-md);
  }

  .cards-grid--2,
  .cards-grid--3 { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .gallery { grid-template-columns: 1fr; }
  .card--doc { flex-wrap: wrap; }
}

/* ============================================================
   Print
   ============================================================ */
@media print {
  .header, .hero__actions, .lightbox, .footer { display: none; }
  .section { padding: 1rem 0; break-inside: avoid; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}