/* ============================================
   MODERN NAVIGATION
   Minimal, elegant, scroll-aware
   ============================================ */

/* Navigation Bar */
.nav-modern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-6) var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-base);
}

.nav-modern::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 1;
  border-bottom: 1px solid var(--color-gray-200);
}

/* Logo */
.nav-modern__logo {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-black);
  text-decoration: none;
  transition: color var(--transition-fast);
  letter-spacing: -0.02em;
}

.nav-modern__logo span {
  color: var(--color-accent);
}

/* Desktop Menu */
.nav-modern__menu {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-modern__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-modern__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

.nav-modern__link:hover::after,
.nav-modern__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-modern__link:hover {
  color: var(--color-accent);
}

/* CTA Button in Nav */
.nav-modern__cta {
  background: var(--color-accent);
  color: var(--color-white) !important;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-modern__cta:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
  color: var(--color-white) !important;
}

/* Mobile Menu Toggle */
.nav-modern__toggle {
  display: none;
  position: relative;
  z-index: 1001;
  width: 32px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-modern__toggle-line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-black);
  transition: all var(--transition-base);
}

.nav-modern__toggle-line:nth-child(1) { top: 0; }
.nav-modern__toggle-line:nth-child(2) { top: 50%; transform: translateY(-50%); }
.nav-modern__toggle-line:nth-child(3) { bottom: 0; }

.nav-modern__toggle.is-active .nav-modern__toggle-line:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.nav-modern__toggle.is-active .nav-modern__toggle-line:nth-child(2) {
  opacity: 0;
  transform: translateX(10px);
}

.nav-modern__toggle.is-active .nav-modern__toggle-line:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* Mobile Menu Overlay */
.nav-modern__overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: none;
  pointer-events: none;
  overflow: hidden;
}

.nav-modern__overlay.is-active {
  display: block;
  pointer-events: auto;
}

/* Animated background panels */
.nav-modern__overlay-panel {
  position: absolute;
  inset: 0;
  transform: translateY(-100%);
  transition: transform 0.6s cubic-bezier(0.77, 0, 0.175, 1);
}

.nav-modern__overlay-panel--1 {
  background: #d97706;
  z-index: 1;
  transition-delay: 0s;
}

.nav-modern__overlay-panel--2 {
  background: #0a0a0a;
  z-index: 2;
  transition-delay: 0.1s;
}

.nav-modern__overlay.is-active .nav-modern__overlay-panel {
  transform: translateY(0);
}

.nav-modern__overlay.is-active .nav-modern__overlay-panel--1 {
  transition-delay: 0s;
}

.nav-modern__overlay.is-active .nav-modern__overlay-panel--2 {
  transition-delay: 0.15s;
}

/* Closing animation - reverse order */
.nav-modern__overlay.is-closing .nav-modern__overlay-panel--1 {
  transition-delay: 0.15s;
}

.nav-modern__overlay.is-closing .nav-modern__overlay-panel--2 {
  transition-delay: 0s;
}

/* Content container */
.nav-modern__overlay-content {
  position: relative;
  z-index: 3;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: var(--space-24) var(--space-8);
  opacity: 0;
  transition: opacity 0.3s ease 0.4s;
}

.nav-modern__overlay.is-active .nav-modern__overlay-content {
  opacity: 1;
}

.nav-modern__overlay.is-closing .nav-modern__overlay-content {
  opacity: 0;
  transition-delay: 0s;
}

/* Links container */
.nav-modern__overlay-links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  width: 100%;
}

/* Individual link styling */
.nav-modern__overlay-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  text-decoration: none;
  padding: var(--space-3) 0;
  position: relative;
  overflow: hidden;
  transform: translateY(40px);
  opacity: 0;
  transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1),
              opacity 0.5s ease;
}

.nav-modern__overlay.is-active .nav-modern__overlay-link {
  transform: translateY(0);
  opacity: 1;
}

/* Staggered animation delays */
.nav-modern__overlay.is-active .nav-modern__overlay-link:nth-child(1) { transition-delay: 0.5s; }
.nav-modern__overlay.is-active .nav-modern__overlay-link:nth-child(2) { transition-delay: 0.6s; }
.nav-modern__overlay.is-active .nav-modern__overlay-link:nth-child(3) { transition-delay: 0.7s; }
.nav-modern__overlay.is-active .nav-modern__overlay-link:nth-child(4) { transition-delay: 0.8s; }

/* Index number */
.nav-modern__overlay-link::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #d97706;
  letter-spacing: 0.05em;
  min-width: 24px;
}

/* Link text */
.nav-modern__overlay-link-text {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 12vw, 4.5rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.02em;
  position: relative;
  transition: color 0.3s ease;
}

/* Hover underline effect */
.nav-modern__overlay-link-text::after {
  content: '';
  position: absolute;
  bottom: 0.1em;
  left: 0;
  width: 100%;
  height: 3px;
  background: #d97706;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-modern__overlay-link:hover .nav-modern__overlay-link-text::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-modern__overlay-link:hover .nav-modern__overlay-link-text {
  color: #d97706;
}

/* Footer section */
.nav-modern__overlay-footer {
  position: absolute;
  bottom: var(--space-12);
  left: var(--space-8);
  right: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease 0.9s,
              transform 0.5s ease 0.9s;
}

.nav-modern__overlay.is-active .nav-modern__overlay-footer {
  opacity: 1;
  transform: translateY(0);
}

.nav-modern__overlay-tagline {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-style: italic;
  color: #737373;
  max-width: 200px;
  line-height: 1.4;
}

.nav-modern__overlay-social {
  display: flex;
  gap: var(--space-6);
}

.nav-modern__overlay-social a {
  color: #737373 !important;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-modern__overlay-social a:hover {
  color: #d97706 !important;
}

/* Responsive */
@media (max-width: 900px) {
  .nav-modern__menu {
    display: none;
  }

  .nav-modern__toggle {
    display: block;
  }
}

@media (max-width: 480px) {
  .nav-modern__overlay-link {
    font-size: var(--text-3xl);
  }
}