/* =============================================
   PACKTECH — NAVBAR STYLES
   Author: Antigravity / PackTech Project
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Montserrat:wght@400;500;600;700;800&display=swap');

/* ─── CSS Variables ─────────────────────────── */
:root {
  --nav-brown: #664A31;
  --nav-brown-dark: #3d2310;
  --nav-brown-light: #7a4a30;
  --nav-btn-bg: #6A2900;
  --nav-btn-hover: #8a4e2a;
  --nav-text: #f0e8df;
  --nav-text-muted: #c8b8a8;
  --nav-active: #ffffff;
  --nav-underline: #d4956a;
  --nav-height: 95px;
  --nav-img-height: 140px;
  /* accounts for torn edge */
  --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-med: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', sans-serif;
  overflow-x: hidden;
}

/* ─── Navbar Wrapper ────────────────────────── */
.packtech-navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  /* torn-edge image as background */
  background-image: url('../image/asset/Navbar.png');
  background-size: 100% 100%;
  background-repeat: no-repeat;
  background-position: top center;
  height: var(--nav-img-height);
  transition: height var(--transition-med), box-shadow var(--transition-med), background-color var(--transition-med);

  /* subtle shadow to lift it off the page */
  filter: drop-shadow(0 4px 20px rgba(58, 30, 10, 0.45));
}

/* ── Scrolled state ── */
.packtech-navbar.scrolled {
  height: var(--nav-height);
  background-image: none;
  background-color: var(--nav-brown);
  border-radius: 0 0 18px 18px;
  filter: drop-shadow(0 6px 28px rgba(40, 18, 6, 0.55));
}

/* ─── Inner Container ───────────────────────── */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ─── Logo ──────────────────────────────────── */
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
  gap: 10px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-logo:hover {
  transform: scale(1.04);
  opacity: 0.92;
}

.nav-logo img {
  height: 65px;
  width: auto;
  object-fit: contain;
  /* logo is white on white background — use filter to make it glow on brown */
  filter: brightness(1) drop-shadow(0 2px 8px rgba(255, 255, 255, 0.25));
  transition: filter var(--transition-fast);
}

.nav-logo:hover img {
  filter: brightness(1.1) drop-shadow(0 2px 14px rgba(255, 255, 255, 0.45));
}

/* ─── Navigation Links ──────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.nav-links li a {
  position: relative;
  display: inline-block;
  color: var(--nav-text-muted);
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  padding: 8px 16px;
  border-radius: 8px;
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

/* Hover state */
.nav-links li a:hover {
  color: var(--nav-active);
  background: rgba(255, 255, 255, 0.07);
}

/* Animated underline */
.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--nav-underline), transparent);
  border-radius: 2px;
  transition: transform var(--transition-fast);
}

.nav-links li a:hover::after,
.nav-links li a.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* Active link */
.nav-links li a.active {
  color: var(--nav-active);
  font-weight: 600;
}

/* ─── CTA Button — Book A Visit ─────────────── */
.nav-cta {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.btn-book {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--nav-btn-bg);
  color: #fff;
  text-decoration: none;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 10px 22px;
  border-radius: 50px;
  border: 1.5px solid rgba(255, 200, 160, 0.18);
  box-shadow:
    0 3px 12px rgba(40, 15, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition:
    background var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
  white-space: nowrap;
}

.btn-book:hover {
  background: var(--nav-btn-hover);
  border-color: rgba(255, 200, 160, 0.35);
  transform: translateY(-2px) scale(1.02);
  box-shadow:
    0 8px 24px rgba(40, 15, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.btn-book:active {
  transform: translateY(0) scale(0.99);
}

/* Arrow icon */
.btn-book .btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.btn-book:hover .btn-icon {
  background: rgba(255, 255, 255, 0.25);
  transform: rotate(45deg);
}

.btn-book .btn-icon svg {
  width: 14px;
  height: 14px;
  stroke: #fff;
  fill: none;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ─── Mobile Hamburger ──────────────────────── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  border: none;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 6px;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.nav-hamburger:hover {
  background: rgba(255, 255, 255, 0.15);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--nav-text);
  border-radius: 2px;
  transition: transform var(--transition-med), opacity var(--transition-fast), width var(--transition-fast);
  transform-origin: center;
}

/* Open state animation */
.packtech-navbar.menu-open .nav-hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.packtech-navbar.menu-open .nav-hamburger span:nth-child(2) {
  opacity: 0;
  width: 0;
}

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

/* ─── Mobile Drawer ─────────────────────────── */
.nav-mobile-drawer {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--nav-brown-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0 0 20px 20px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  overflow: hidden;

  /* animate */
  max-height: 0;
  opacity: 0;
  transition: max-height var(--transition-med), opacity var(--transition-med);
}

.packtech-navbar.menu-open .nav-mobile-drawer {
  max-height: 500px;
  opacity: 1;
}

.nav-mobile-links {
  list-style: none;
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-mobile-links li a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--nav-text-muted);
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  padding: 12px 16px;
  border-radius: 10px;
  border-left: 2px solid transparent;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.nav-mobile-links li a:hover,
.nav-mobile-links li a.active {
  color: var(--nav-active);
  background: rgba(255, 255, 255, 0.07);
  border-left-color: var(--nav-underline);
  transform: translateX(4px);
}

.nav-mobile-links li a.active {
  font-weight: 600;
}

/* Mobile CTA */
.nav-mobile-cta {
  padding: 0 24px 24px;
}

.nav-mobile-cta .btn-book {
  width: 100%;
  justify-content: center;
  font-size: 0.95rem;
  padding: 13px 22px;
}

/* ─── Scroll Progress Bar ───────────────────── */
.nav-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--nav-underline), #e8b89a);
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
  display: none;
  /* shown only when scrolled */
}

.packtech-navbar.scrolled .nav-progress-bar {
  display: block;
}

/* ─── Entrance Animation ────────────────────── */
@keyframes navSlideDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.packtech-navbar {
  animation: navSlideDown 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

/* Link stagger animation on load */
@keyframes linkFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-links li {
  animation: linkFadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.nav-links li:nth-child(1) {
  animation-delay: 0.15s;
}

.nav-links li:nth-child(2) {
  animation-delay: 0.22s;
}

.nav-links li:nth-child(3) {
  animation-delay: 0.29s;
}

.nav-links li:nth-child(4) {
  animation-delay: 0.36s;
}

.nav-links li:nth-child(5) {
  animation-delay: 0.43s;
}

.nav-cta {
  animation: linkFadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.5s both;
}

/* ─── Responsive — Tablet ───────────────────── */
@media (max-width: 1024px) {
  .nav-inner {
    padding: 0 20px;
  }

  .nav-links li a {
    font-size: 0.87rem;
    padding: 7px 11px;
  }

  .btn-book {
    font-size: 0.82rem;
    padding: 9px 16px;
  }
}

/* ─── Responsive — Mobile ───────────────────── */
@media (max-width: 768px) {
  .packtech-navbar {
    height: 80px;
    background-size: cover;
  }

  .packtech-navbar.scrolled {
    height: 75px;
    border-radius: 0 0 14px 14px;
  }

  .nav-inner {
    height: 100%;
    padding: 0 18px;
  }

  /* Hide desktop links & CTA */
  .nav-links,
  .nav-cta {
    display: none;
  }

  /* Show hamburger */
  .nav-hamburger {
    display: flex;
  }

  /* Show mobile drawer */
  .nav-mobile-drawer {
    display: block;
    top: 80px;
  }

  .packtech-navbar.scrolled .nav-mobile-drawer {
    top: 75px;
  }

  .nav-logo img {
    height: 42px;
  }
}

@media (max-width: 480px) {
  .nav-inner {
    padding: 0 14px;
  }

  .nav-logo img {
    height: 38px;
  }
}