/* ============================================
   Component Styles — COMPONENTS
   Reusable UI components
   ============================================ */

/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-align: center;
  border-radius: var(--radius-small);
  transition: all var(--duration-medium) var(--easing-ease-out);
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  text-decoration: none;
  border: none;
  background: none;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background-color: var(--interactive-pressed);
  color: var(--bg-primary);
}

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

.btn-secondary:hover {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
  border-color: var(--accent-primary);
}

.btn-large {
  padding: var(--space-5) var(--space-8);
  font-size: clamp(18px, 2vw, 20px);
}

/* Mobile full-width buttons */
@media (max-width: 767px) {
  .btn-large {
    width: 100%;
  }
}

/* ===== Header ===== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--duration-medium) var(--easing-ease-out);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  gap: var(--space-6);
}

.header-logo {
  font-size: clamp(20px, 3vw, 24px);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  text-decoration: none;
}

.header-logo:hover {
  color: var(--interactive-hover);
}

/* Desktop Navigation */
.nav-desktop {
  display: none;
}

@media (min-width: 768px) {
  .nav-desktop {
    display: block;
  }
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--easing-ease-out);
}

.nav-link:hover {
  color: var(--interactive-hover);
}

.header-cta {
  display: none;
}

@media (min-width: 768px) {
  .header-cta {
    display: inline-flex;
  }
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: calc(var(--z-nav-menu) + 1);
  position: relative;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  position: relative;
  transition: background-color var(--duration-medium) var(--easing-ease-out);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  position: absolute;
  left: 0;
  transition: transform var(--duration-medium) var(--easing-ease-out);
}

.nav-toggle-icon::before {
  top: -8px;
}

.nav-toggle-icon::after {
  bottom: -8px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Navigation Menu */
.nav-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: min(280px, 85vw);
  max-width: 100%;
  height: 100vh;
  height: 100dvh;
  background-color: var(--bg-primary);
  z-index: var(--z-nav-menu);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--duration-medium) var(--easing-ease-out),
              visibility var(--duration-medium) var(--easing-ease-out);
  overflow-y: auto;
}

.nav-menu[aria-expanded="true"] {
  transform: translateX(0);
  visibility: visible;
}

.nav-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 32px;
  line-height: 1;
  color: var(--text-primary);
}

.nav-menu-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.nav-menu-link {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--easing-ease-out);
}

.nav-menu-link:hover {
  color: var(--interactive-hover);
}

.nav-menu-cta {
  margin-top: auto;
}

/* Navigation Backdrop */
.nav-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 22, 40, 0.45);
  z-index: var(--z-nav-backdrop);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-medium) var(--easing-ease-out),
              visibility var(--duration-medium) var(--easing-ease-out);
}

.nav-backdrop.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ===== Footer ===== */

.footer {
  background-color: var(--bg-secondary);
  padding-top: var(--space-12);
  padding-bottom: var(--space-8);
  border-top: 1px solid var(--border-subtle);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-logo {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.footer-tagline {
  font-size: var(--font-size-small);
  color: var(--text-secondary);
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-link {
  font-size: var(--font-size-small);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--easing-ease-out);
}

.footer-nav-link:hover {
  color: var(--text-primary);
}

.footer-social {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-social-link {
  font-size: var(--font-size-small);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--easing-ease-out);
}

.footer-social-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer-copyright {
  font-size: var(--font-size-caption);
  color: var(--text-tertiary);
  margin-bottom: 0;
}

/* Mobile footer adjustments */
@media (max-width: 767px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* ===== Lightbox ===== */

.lightbox {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 22, 40, 0.92);
  z-index: var(--z-lightbox);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-medium) var(--easing-ease-out),
              visibility var(--duration-medium) var(--easing-ease-out);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  width: 90vw;
  height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  user-select: none;
}

.lightbox-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--bg-primary);
  border-radius: var(--radius-small);
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--easing-ease-out);
}

.lightbox-close:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--bg-primary);
  border-radius: var(--radius-small);
  font-size: 24px;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--easing-ease-out);
}

.lightbox-prev:hover,
.lightbox-next:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.lightbox-prev {
  left: var(--space-4);
}

.lightbox-next {
  right: var(--space-4);
}

.lightbox-counter {
  position: absolute;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--font-size-small);
  color: var(--bg-primary);
  background-color: rgba(10, 10, 10, 0.5);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-small);
}

/* ===== Back to Top Button ===== */

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #2D2D2D;
  color: #FFFFFF;
  border: none;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(10, 10, 10, 0.12);
  cursor: pointer;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 300ms cubic-bezier(0.0, 0.0, 0.2, 1);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: #1A1A1A;
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(10, 10, 10, 0.15);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* Mobile adjustments */
@media (max-width: 767px) {
  .back-to-top {
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
  }
  
  .back-to-top svg {
    width: 20px;
    height: 20px;
  }
}

/* Ensure button is above nav menu */
@media (max-width: 767px) {
  body.menu-open .back-to-top {
    z-index: 1002;
  }
}