/* ═══════════════════════════════════════════════════════════════
   SPARC ENERGY — Classic Luxury Light Design System
   Palette: Ivory · Sage · Forest · Gold · Slate
   Inspired by: South Pole · McKinsey · Hermes · FT
═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
img, video { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Design Tokens ── */
:root {
  /* Luxury Palette */
  --ivory:    #FAFAF7;   /* warm off-white background */
  --ivory-2:  #F4F3EE;   /* slightly deeper ivory */
  --ivory-3:  #ECEAE2;   /* card tint */
  --white:    #FFFFFF;
  --sage:     #52b788;   /* brand green */
  --sage-lt:  #E8F5EE;   /* sage tint */
  --sage-mid: #2D7A55;   /* mid green */
  --forest:   #0a1f12;   /* deep forest */
  --forest-2: #1a3a22;
  --gold:     #B8860B;   /* dark gold accent */
  --gold-lt:  #FDF6E3;   /* gold tint */
  --slate:    #374151;   /* body text */
  --slate-2:  #6B7280;   /* secondary text */
  --slate-3:  #9CA3AF;   /* muted text */
  --border:   #E5E7EB;
  --border-2: #D1D5DB;

  /* Typography */
  --f-serif: 'Playfair Display', Georgia, serif;
  --f-sans:  'DM Sans', system-ui, sans-serif;

  /* Spacing */
  --nav-h: 72px;
  --max-w: 1280px;
  --section-py: 96px;

  /* Radius */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 16px;
  --r-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.12);

  /* Easing */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Base ── */
body {
  font-family: var(--f-sans);
  background: var(--ivory);
  color: var(--slate);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  padding-top: var(--nav-h);
}

/* ═══════════════════════════════════════════════════════════════
   NAVIGATION
═══════════════════════════════════════════════════════════════ */
.lux-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s var(--ease);
}
.lux-nav.scrolled {
  box-shadow: var(--shadow-md);
}
.lux-nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

/* Brand */
.lux-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  transition: opacity 0.2s;
}
.lux-brand:hover { opacity: 0.75; }
.lux-brand-icon {
  width: 38px; height: 38px;
  background: var(--forest);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--sage);
  flex-shrink: 0;
}
.lux-brand-text { line-height: 1.1; }
.lux-brand-name {
  font-family: var(--f-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--forest);
  letter-spacing: -0.01em;
  display: block;
}
.lux-brand-sub {
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--sage);
  text-transform: uppercase;
  display: block;
  margin-top: 1px;
}

/* Nav Links */
.lux-nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: center;
}
.lux-nav-link {
  padding: 8px 16px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--slate-2);
  border-radius: var(--r-md);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}
.lux-nav-link:hover, .lux-nav-link.active {
  color: var(--forest);
  background: var(--sage-lt);
}

/* Dropdown */
.lux-dropdown { position: relative; }
.lux-dropdown-trigger { cursor: pointer; }
.lux-dropdown-trigger svg { transition: transform 0.2s; }
.lux-dropdown:hover .lux-dropdown-trigger svg { transform: rotate(180deg); }

.lux-dropdown-panel {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xl);
  padding: 8px;
  min-width: 520px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.2s var(--ease);
  transform: translateX(-50%) translateY(-4px);
}
.lux-dropdown:hover .lux-dropdown-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
.lux-dd-section { padding: 8px; }
.lux-dd-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--slate-3);
  padding: 4px 12px 8px;
}
.lux-dd-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--r-md);
  transition: background 0.15s;
}
.lux-dd-item:hover { background: var(--ivory-2); }
.lux-dd-icon {
  width: 34px; height: 34px;
  background: var(--sage-lt);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.lux-dd-title {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--forest);
  margin-bottom: 2px;
}
.lux-dd-desc {
  font-size: 12px;
  color: var(--slate-3);
  line-height: 1.4;
}

/* Nav Actions */
.lux-nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.lux-btn-ghost {
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--slate);
  border-radius: var(--r-md);
  transition: all 0.2s;
}
.lux-btn-ghost:hover {
  background: var(--ivory-2);
  color: var(--forest);
}
.lux-btn-primary {
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  background: var(--forest);
  border-radius: var(--r-md);
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}
.lux-btn-primary:hover {
  background: var(--forest-2);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Burger */
.lux-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px; height: 36px;
  padding: 8px;
  border-radius: var(--r-md);
  transition: background 0.2s;
}
.lux-burger:hover { background: var(--ivory-2); }
.lux-burger span {
  display: block;
  width: 100%; height: 1.5px;
  background: var(--slate);
  border-radius: 2px;
  transition: all 0.3s;
}
.lux-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.lux-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.lux-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ═══════════════════════════════════════════════════════════════
   PAGE HERO (inner pages)
═══════════════════════════════════════════════════════════════ */
.lux-page-hero {
  background: var(--forest);
  padding: 80px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.lux-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(82,183,136,0.15) 0%, transparent 70%);
}
.lux-page-hero-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.lux-page-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sage);
  margin-bottom: 20px;
}
.lux-page-eyebrow::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--sage);
}
.lux-page-h1 {
  font-family: var(--f-serif);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.lux-page-sub {
  font-size: 17px;
  color: rgba(255,255,255,0.65);
  line-height: 1.6;
  max-width: 560px;
  margin: 0 auto;
}

/* ═══════════════════════════════════════════════════════════════
   SECTIONS
═══════════════════════════════════════════════════════════════ */
.lux-section {
  padding: var(--section-py) 40px;
}
.lux-section-tint { background: var(--ivory-2); }
.lux-section-dark { background: var(--forest); }
.lux-container {
  max-width: var(--max-w);
  margin: 0 auto;
}
.lux-section-hdr {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}
.lux-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sage-mid);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.lux-eyebrow::before, .lux-eyebrow::after {
  content: '';
  width: 20px; height: 1px;
  background: var(--sage-mid);
}
.lux-h2 {
  font-family: var(--f-serif);
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 600;
  color: var(--forest);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.lux-h2 em { font-style: italic; color: var(--sage-mid); }
.lux-section-sub {
  font-size: 16px;
  color: var(--slate-2);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════════════════════════
   CARDS
═══════════════════════════════════════════════════════════════ */
.lux-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s var(--ease);
}
.lux-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--border-2);
}
.lux-card-title {
  font-family: var(--f-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--forest);
  margin-bottom: 12px;
}

/* ═══════════════════════════════════════════════════════════════
   BUTTONS
═══════════════════════════════════════════════════════════════ */
.lux-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--r-md);
  transition: all 0.2s var(--ease);
  cursor: pointer;
  border: none;
  font-family: var(--f-sans);
}
.lux-btn-dark {
  background: var(--forest);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}
.lux-btn-dark:hover {
  background: var(--forest-2);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.lux-btn-sage {
  background: var(--sage);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(82,183,136,0.3);
}
.lux-btn-sage:hover {
  background: var(--sage-mid);
  box-shadow: 0 4px 16px rgba(82,183,136,0.4);
  transform: translateY(-1px);
}
.lux-btn-outline {
  background: transparent;
  color: var(--forest);
  border: 1.5px solid var(--border-2);
}
.lux-btn-outline:hover {
  border-color: var(--forest);
  background: var(--ivory-2);
}

/* ═══════════════════════════════════════════════════════════════
   BADGES & TAGS
═══════════════════════════════════════════════════════════════ */
.lux-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 600;
}
.lux-badge-sage { background: var(--sage-lt); color: var(--sage-mid); }
.lux-badge-gold { background: var(--gold-lt); color: var(--gold); }
.lux-badge-forest { background: var(--forest); color: var(--sage); }
.lux-badge-green { background: #DCFCE7; color: #166534; }
.lux-badge-amber { background: #FEF3C7; color: #92400E; }

/* ═══════════════════════════════════════════════════════════════
   FORMS
═══════════════════════════════════════════════════════════════ */
.lux-form-group { margin-bottom: 20px; }
.lux-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--slate);
  margin-bottom: 7px;
  letter-spacing: 0.01em;
}
.lux-input, .lux-select, .lux-textarea {
  width: 100%;
  padding: 11px 14px;
  font-size: 14.5px;
  font-family: var(--f-sans);
  color: var(--forest);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  outline: none;
  transition: all 0.2s;
  line-height: 1.5;
}
.lux-input:focus, .lux-select:focus, .lux-textarea:focus {
  border-color: var(--sage);
  box-shadow: 0 0 0 3px rgba(82,183,136,0.12);
}
.lux-input::placeholder, .lux-textarea::placeholder { color: var(--slate-3); }
.lux-textarea { resize: vertical; min-height: 100px; }
.lux-select { appearance: none; cursor: pointer; }

/* ═══════════════════════════════════════════════════════════════
   FILTER SIDEBAR
═══════════════════════════════════════════════════════════════ */
.lux-filter-sidebar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  height: fit-content;
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  box-shadow: var(--shadow-sm);
}
.lux-filter-title {
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--forest);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.lux-filter-group { margin-bottom: 24px; }
.lux-filter-group-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--slate-3);
  margin-bottom: 12px;
}
.lux-filter-check {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  cursor: pointer;
  font-size: 14px;
  color: var(--slate);
  transition: color 0.15s;
}
.lux-filter-check:hover { color: var(--forest); }
.lux-filter-check input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--sage);
  cursor: pointer;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════════ */
.lux-footer {
  background: var(--forest);
  padding: 72px 40px 40px;
}
.lux-footer-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.lux-footer-brand-name {
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  display: block;
}
.lux-footer-brand-sub {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--sage);
  text-transform: uppercase;
  display: block;
  margin-top: 2px;
  margin-bottom: 16px;
}
.lux-footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  line-height: 1.7;
  margin-bottom: 24px;
}
.lux-footer-socials { display: flex; gap: 12px; }
.lux-footer-soc {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.12);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.5);
  transition: all 0.2s;
}
.lux-footer-soc:hover {
  border-color: var(--sage);
  color: var(--sage);
  background: rgba(82,183,136,0.08);
}
.lux-footer-col-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.35);
  margin-bottom: 20px;
}
.lux-footer-link {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  padding: 5px 0;
  transition: color 0.2s;
}
.lux-footer-link:hover { color: var(--white); }
.lux-footer-bottom {
  max-width: var(--max-w);
  margin: 32px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.3);
  flex-wrap: wrap;
  gap: 12px;
}
.lux-footer-certs { display: flex; gap: 16px; }
.lux-footer-certs span {
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}

/* ═══════════════════════════════════════════════════════════════
   REVEAL ANIMATIONS
═══════════════════════════════════════════════════════════════ */
.lux-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.lux-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.lux-reveal-l {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.lux-reveal-l.visible { opacity: 1; transform: translateX(0); }
.lux-reveal-r {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.lux-reveal-r.visible { opacity: 1; transform: translateX(0); }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .lux-nav-links { display: none; }
  .lux-nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    box-shadow: var(--shadow-lg);
    gap: 4px;
  }
  .lux-nav-links.open .lux-nav-link { width: 100%; }
  .lux-dropdown-panel {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    display: none;
    grid-template-columns: 1fr;
    min-width: 0;
    box-shadow: none;
    border: 1px solid var(--border);
    margin-top: 4px;
  }
  .lux-dropdown.open .lux-dropdown-panel { display: grid; }
  .lux-dropdown:hover .lux-dropdown-panel { opacity: 1; visibility: visible; transform: none; }
  .lux-burger { display: flex; }
  .lux-footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .lux-section { padding: 64px 24px; }
  .lux-page-hero { padding: 60px 24px; }
}

@media (max-width: 640px) {
  :root { --nav-h: 64px; }
  .lux-nav-inner { padding: 0 20px; }
  .lux-btn-ghost { display: none; }
  .lux-footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .lux-footer { padding: 48px 20px 32px; }
  .lux-section { padding: 48px 20px; }
}