/* ===== HEADER PREMIUM — Bicalho & Partners ===== */

/* COLOR SCHEME */
:root {
  --nav-bg: #ffffff;
  --nav-bg-scrolled: rgba(255, 255, 255, 0.98);
  --nav-border: rgba(0, 0, 0, 0.08);
  --nav-text: #1a2d2e;
  --nav-text-muted: #6b8080;
  --nav-hover: #1a5a5e;
  --nav-accent: #d4a574;
  --mega-bg: #f9f8f6;
  --mega-border: rgba(0, 0, 0, 0.06);
}

/* ===== HEADER ===== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
}

header.scrolled {
  background: var(--nav-bg-scrolled);
  border-bottom-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* ===== NAV CONTAINER ===== */
.nav {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 0 24px;
  max-width: 1480px;
  margin: 0 auto;
  width: 100%;
}

/* ===== BRAND/LOGO ===== */
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  flex-shrink: 0;
}

.brand:hover {
  transform: translateY(-2px);
}

.brand img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  display: block;
}

.brand div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1;
}

.brand b {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--nav-text);
}

.brand small {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--nav-text-muted);
  text-transform: uppercase;
}

/* ===== MENU DESKTOP ===== */
.menu {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
  flex: 1;
}

.menu > a,
.menu > button {
  position: relative;
  font: inherit;
  background: none;
  border: none;
  color: var(--nav-text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.2s ease;
  padding: 6px 0;
  white-space: nowrap;
}

.menu > a::after,
.menu > button::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--nav-hover);
  transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.menu > a:hover,
.menu > button:hover {
  color: var(--nav-hover);
}

.menu > a:hover::after,
.menu > button:hover::after {
  width: 100%;
}

/* ===== MEGA MENU WRAPPER ===== */
.mega-wrap {
  position: relative;
}

.mega-wrap > button {
  padding: 6px 0 !important;
}

/* ===== MEGA MENU DROPDOWN ===== */
.mega {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  transform-origin: top;
  width: 700px;
  max-width: 90vw;
  background: var(--mega-bg);
  border: 1px solid var(--mega-border);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
  padding: 28px;
  margin-top: 8px;
  
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
}

.mega-wrap:hover .mega {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega h4 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nav-text);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.mega a {
  display: block;
  padding: 8px 0;
  color: var(--nav-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
  padding-left: 0;
}

.mega a::before {
  content: '';
  position: absolute;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--nav-hover);
  top: 50%;
  transition: width 0.2s ease;
}

.mega a:hover {
  color: var(--nav-hover);
  padding-left: 8px;
}

.mega a:hover::before {
  width: 4px;
}

/* ===== NAV CTA ===== */
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-cta .btn {
  padding: 10px 24px;
  font-size: 0.85rem;
}

/* ===== BUTTON STYLES ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background 0.2s ease;
  border-radius: inherit;
  z-index: -1;
}

.btn:hover::before {
  background: rgba(255, 255, 255, 0.1);
}

.btn.primary {
  background: linear-gradient(135deg, #1a5a5e 0%, #2a7a7f 100%);
  color: white;
  box-shadow: 0 4px 16px rgba(26, 90, 94, 0.25);
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 90, 94, 0.35);
}

.btn.primary:active {
  transform: translateY(0);
}

/* ===== HAMBURGER MENU ===== */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background 0.2s ease;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
}

.hamburger:hover {
  background: rgba(26, 90, 94, 0.08);
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--nav-text);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  transform-origin: center;
}

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

.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .nav {
    gap: 24px;
  }
  
  .menu {
    gap: 20px;
  }
  
  .mega {
    width: 600px;
    max-width: 90vw;
  }
}

@media (max-width: 900px) {
  .hamburger {
    display: flex;
  }
  
  .nav-cta {
    display: none;
  }
  
  .menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    max-height: 80vh;
    overflow-y: auto;
    flex-direction: column;
    background: var(--nav-bg);
    border-top: 1px solid var(--nav-border);
    border-bottom: 1px solid var(--nav-border);
    padding: 12px 0;
    gap: 0;
    margin: 0;
    animation: menuSlide 0.3s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    z-index: 999;
  }
  
  .menu.open {
    display: flex;
  }
  
  .menu > a,
  .menu > button {
    padding: 12px 24px;
    border-radius: 0;
    font-size: 0.9rem;
    width: 100%;
  }
  
  .menu > a::after,
  .menu > button::after {
    display: none;
  }
  
  .menu > a:hover,
  .menu > button:hover {
    background: rgba(26, 90, 94, 0.06);
  }
  
  .mega-wrap {
    width: 100%;
  }
  
  .mega {
    position: static;
    transform: none;
    width: 100%;
    max-width: 100%;
    opacity: 1;
    visibility: visible;
    pointer-events: none;
    display: none;
    grid-template-columns: 1fr;
    border: none;
    border-top: 1px solid var(--nav-border);
    border-radius: 0;
    box-shadow: none;
    padding: 8px 24px;
    margin: 0;
    gap: 12px;
    background: rgba(26, 90, 94, 0.03);
    margin-top: 8px;
  }
  
  .mega-wrap.open .mega {
    display: grid;
    pointer-events: auto;
  }
  
  .mega-wrap:hover .mega {
    display: none;
  }
  
  .mega h4 {
    font-size: 0.7rem;
    padding-top: 8px;
    margin-top: 8px;
  }
  
  .mega h4:first-child {
    margin-top: 0;
    padding-top: 0;
  }
  
  .mega a {
    padding: 8px 0;
    padding-left: 0;
  }
  
  .mega a::before {
    display: none;
  }
  
  .mega a:hover {
    padding-left: 0;
    color: var(--nav-hover);
  }
  
  .nav {
    height: auto;
    padding: 12px 24px;
  }
}

@media (max-width: 600px) {
  .nav {
    gap: 12px;
    padding: 12px 16px;
  }
  
  .brand {
    gap: 10px;
  }
  
  .brand img {
    width: 40px;
    height: 40px;
  }
  
  .brand b {
    font-size: 0.85rem;
  }
  
  .brand small {
    font-size: 0.6rem;
  }
  
  .menu > a,
  .menu > button {
    padding: 12px 20px;
    font-size: 0.85rem;
  }
}

@keyframes menuSlide {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}