/*
Theme Name: Lukla Helicopter
Theme URI: https://luklahelicopter.com
Author: Lukla Helicopter Team
Author URI: https://luklahelicopter.com
Description: Custom premium theme for Lukla Helicopter — Everest region helicopter booking agency. Built for speed, SEO, and full WP Travel Engine compatibility.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: Private
Text Domain: luklahelicopter

--- DESIGN SYSTEM ---
Primary Blue:     #005b94
Deep Navy:        #0a1628
Accent Gold:      #c8922a
Light Blue:       #e8f4fd
Background:       #f8fafc
White:            #ffffff
Text Primary:     #0a1628
Text Muted:       #5a6a7a
Border:           rgba(10,22,40,0.10)
*/

/* ============================================
   RESET & BASE
============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: #0a1628;
  background: #ffffff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   CSS VARIABLES
============================================ */
:root {
  --brand:        #005b94;
  --brand-dark:   #004070;
  --brand-light:  #e8f4fd;
  --navy:         #0a1628;
  --gold:         #c8922a;
  --gold-light:   #fdf3e3;
  --white:        #ffffff;
  --bg:           #f8fafc;
  --bg-alt:       #f0f5fa;
  --ink:          #0a1628;
  --muted:        #5a6a7a;
  --line:         rgba(10,22,40,0.10);
  --line-med:     rgba(10,22,40,0.18);
  --radius-sm:    8px;
  --radius-md:    14px;
  --radius-lg:    20px;
  --radius-xl:    28px;
  --shadow-sm:    0 2px 8px rgba(10,22,40,0.06);
  --shadow-md:    0 6px 24px rgba(10,22,40,0.10);
  --shadow-lg:    0 16px 48px rgba(10,22,40,0.14);
  --shadow-brand: 0 8px 32px rgba(0,91,148,0.22);
  --transition:   all 0.22s ease;
  --container:    min(1120px, 92vw);
}

/* ============================================
   TYPOGRAPHY
============================================ */
h1, h2, h3, h4, h5, h6 {
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
}

h1 { font-size: clamp(28px, 5vw, 52px); }
h2 { font-size: clamp(22px, 3.5vw, 36px); }
h3 { font-size: clamp(18px, 2.5vw, 24px); }
h4 { font-size: 18px; }
h5 { font-size: 16px; }
h6 { font-size: 14px; }

p { color: var(--muted); line-height: 1.75; margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--brand); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--brand-dark); }

strong { color: var(--ink); font-weight: 600; }
em { font-style: italic; }

ul, ol { padding-left: 1.5rem; color: var(--muted); }
li { margin-bottom: 0.4rem; line-height: 1.6; }

blockquote {
  border-left: 3px solid var(--brand);
  padding: 1rem 1.5rem;
  background: var(--brand-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--brand-dark);
}

img { max-width: 100%; height: auto; display: block; }

/* ============================================
   LAYOUT
============================================ */
.container { width: var(--container); margin: 0 auto; }

.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.section-lg { padding: 96px 0; }

.section-header { margin-bottom: 48px; }
.section-header.center { text-align: center; }
.section-header.center .section-sub { margin: 0 auto; }

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 12px;
}
.section-eyebrow::before,
.section-eyebrow::after {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--brand);
  opacity: 0.4;
}
.section-eyebrow.no-lines::before,
.section-eyebrow.no-lines::after { display: none; }

.section-title { margin-bottom: 12px; }
.section-sub { font-size: 17px; color: var(--muted); max-width: 60ch; line-height: 1.7; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ============================================
   BUTTONS
============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff !important;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover { box-shadow: 0 12px 40px rgba(0,91,148,0.32); }

.btn-secondary {
  background: var(--white);
  color: var(--brand) !important;
  border: 1.5px solid var(--brand);
}
.btn-secondary:hover { background: var(--brand-light); }

.btn-ghost {
  background: rgba(255,255,255,0.15);
  color: #fff !important;
  border: 1.5px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255,255,255,0.25); }

.btn-gold {
  background: linear-gradient(135deg, var(--gold) 0%, #a87520 100%);
  color: #fff !important;
}

.btn-sm { padding: 9px 16px; font-size: 13px; }
.btn-lg { padding: 16px 32px; font-size: 17px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ============================================
   CARDS
============================================ */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.card:hover {
  border-color: rgba(0,91,148,0.2);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

/* ============================================
   BADGES & TAGS
============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.badge-brand { background: var(--brand-light); color: var(--brand); }
.badge-gold { background: var(--gold-light); color: var(--gold); }
.badge-navy { background: var(--navy); color: #fff; }
.badge-white { background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.2); }

/* ============================================
   FORMS
============================================ */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--line-med);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--ink);
  background: #fff;
  transition: var(--transition);
  font-family: inherit;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(0,91,148,0.10);
}
.form-textarea { min-height: 120px; resize: vertical; }

/* ============================================
   DIVIDERS
============================================ */
.divider { border: none; border-top: 1px solid var(--line); margin: 0; }

/* ============================================
   ALERTS
============================================ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid;
}
.alert svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.alert p { font-size: 14px; line-height: 1.65; margin: 0; }
.alert-info { background: #eff6ff; border-color: #bfdbfe; }
.alert-info svg { stroke: #1d4ed8; }
.alert-info p { color: #1e3a5f; }
.alert-warn { background: #fffbeb; border-color: #fde68a; }
.alert-warn svg { stroke: #b45309; }
.alert-warn p { color: #78350f; }
.alert-success { background: #f0fdf4; border-color: #86efac; }
.alert-success svg { stroke: #16a34a; }
.alert-success p { color: #14532d; }

/* ============================================
   UTILITY
============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.text-brand { color: var(--brand); }
.text-gold { color: var(--gold); }
.text-white { color: #fff; }
.font-bold { font-weight: 700; }
.mt-auto { margin-top: auto; }
.w-full { width: 100%; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.hidden { display: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ============================================
   RESPONSIVE
============================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
  .section-lg { padding: 64px 0; }
  .btn-row { flex-direction: column; }
  .btn-row .btn { width: 100%; justify-content: center; }
}
@media (max-width: 480px) {
  .section { padding: 40px 0; }
  .card { padding: 20px; }
}