/* ==========================================================================
   EXCELL VALLEY TECHNOLOGIES - COMPONENTS SYSTEM
   ========================================================================== */

/* 1. BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--secondary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 174, 239, 0.3);
}

.btn-primary:hover {
  background-color: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 91, 170, 0.4);
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background-color: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-light {
  background-color: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-light:hover {
  background-color: var(--light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-link {
  background: transparent;
  color: var(--secondary);
  padding: 0;
  font-weight: 600;
  border-radius: 0;
  gap: 0.25rem;
}

.btn-link::after {
  content: ' →';
  transition: transform var(--transition-fast);
}

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

.btn-link:hover::after {
  transform: translateX(4px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* 2. PREMIUM STICKY HEADER & DROPDOWN */
.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 1002;
}

.logo-img {
  height: 48px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-normal);
}

.logo-wrapper:hover .logo-img {
  transform: scale(1.02);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--secondary) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.5rem;
  font-family: var(--font-display);
  box-shadow: var(--shadow-sm);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
  color: var(--primary);
  transition: color var(--transition-normal);
}

.logo-subtitle {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--secondary);
  font-weight: 600;
  margin-top: -3px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: nowrap;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary);
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--secondary);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--secondary);
}

/* Dropdown Menu Styles */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: 1rem 0;
  min-width: 240px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 1001;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: block;
  padding: 0.65rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--light);
  color: var(--secondary);
  padding-left: 1.75rem;
}

/* Hamburger / Mobile Menu Button */
.hamburger {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1002;
  width: 30px;
  height: 24px;
  position: relative;
}

.hamburger span {
  display: block;
  position: absolute;
  height: 3px;
  width: 100%;
  background: var(--primary);
  border-radius: 9px;
  opacity: 1;
  left: 0;
  transform: rotate(0deg);
  transition: .25s ease-in-out;
}

.hamburger span:nth-child(1) { top: 0px; }
.hamburger span:nth-child(2), .hamburger span:nth-child(3) { top: 10px; }
.hamburger span:nth-child(4) { top: 20px; }

.hamburger.open span:nth-child(1) { top: 10px; width: 0%; left: 50%; }
.hamburger.open span:nth-child(2) { transform: rotate(45deg); }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg); }
.hamburger.open span:nth-child(4) { top: 10px; width: 0%; left: 50%; }

/* Mobile Menu overlay */
@media (max-width: 1024px) {
  .hamburger {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    height: 100vh;
    background: var(--primary);
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 40px 40px 40px;
    gap: 1.5rem;
    transition: right var(--transition-normal);
    z-index: 1000;
  }
  .nav-menu.active {
    right: 0;
  }
  .nav-link {
    color: #ffffff;
    font-size: 1.1rem;
    width: 100%;
    justify-content: space-between;
  }
  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: rgba(255,255,255,0.05);
    border: none;
    box-shadow: none;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    min-width: 100%;
    display: none;
  }
  .nav-item.active-mobile .dropdown-menu {
    display: block;
  }
  .dropdown-item {
    color: rgba(255,255,255,0.7);
    padding: 0.5rem 1rem;
  }
  header.scrolled .hamburger span {
    background: var(--primary);
  }
}

/* 3. PREMIUM FOOTER */
footer {
  background-color: var(--primary);
  color: var(--text-on-primary);
  padding: var(--spacing-xl) 0 var(--spacing-sm) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.25fr 1.25fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--secondary);
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-light);
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: var(--secondary);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--text-light);
  font-size: 0.95rem;
}

.footer-contact svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--secondary);
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom-links a {
  font-size: 0.85rem;
  color: var(--text-light);
}

.footer-bottom-links a:hover {
  color: var(--secondary);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* 4. CARDS (SERVICE, INDUSTRY, VALUE) */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 174, 239, 0.2);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: rgba(10, 25, 47, 0.04);
  color: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: all var(--transition-normal);
}

.card:hover .card-icon {
  background: var(--secondary);
  color: #ffffff;
  transform: scale(1.05);
}

.card h3 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.card p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* 5. ACCORDION / FAQ */
.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-family: var(--font-display);
  color: var(--primary);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--light);
}

.accordion-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-item.active .accordion-header {
  border-bottom: 1px solid var(--border);
}

.accordion-content {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-normal);
  background: #fafafa;
}

.accordion-item.active .accordion-content {
  padding: 1.5rem;
  max-height: 1000px;
}

/* 6. FORMS & INPUTS */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.form-control {
  width: 100%;
  padding: 0.875rem 1.25rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: var(--surface);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 4px rgba(0, 174, 239, 0.1);
}

/* 7. BACK TO TOP BUTTON */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background-color: var(--secondary);
  color: #ffffff;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  border: none;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* 8. BREADCRUMBS */
.breadcrumbs {
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumbs li:not(:last-child)::after {
  content: '/';
  margin-left: 0.5rem;
  color: var(--text-light);
}

.breadcrumbs a {
  color: var(--text-muted);
}

.breadcrumbs a:hover {
  color: var(--secondary);
}

.breadcrumbs li.active {
  color: var(--primary);
  font-weight: 600;
}

/* Header CTA button responsiveness */
.mobile-cta {
  display: none !important;
}

.desktop-cta {
  display: inline-flex !important;
}

@media (max-width: 1024px) {
  .mobile-cta {
    display: block !important;
  }
  .desktop-cta {
    display: none !important;
  }
}