/* ============================================
   ENELIS — Design system
   Bureau d'études en conseil énergétique
   ============================================ */

:root {
  /* Brand palette */
  --navy: #0E1A2B;
  --navy-deep: #081120;
  --navy-700: #182A44;
  --navy-500: #2A3F5F;
  --navy-300: #5A6B85;
  --navy-100: #C9D0DC;

  --forest: #2D5F3F;
  --forest-dark: #214A2F;
  --forest-soft: #6B8B5E;
  --leaf: #8FA876;

  --copper: #B89968;
  --copper-soft: #D4B689;
  --gold: #C9A86A;

  --ivory: #F5F1E8;
  --ivory-warm: #EFE9DC;
  --paper: #FBF9F4;
  --paper-pure: #FFFFFF;

  --ink: #0E1A2B;
  --ink-soft: #4A5468;
  --ink-mute: #8B93A4;
  --line: #E3DED1;
  --line-soft: #EFEADD;

  /* Type */
  --serif: "Cormorant Garamond", "Cormorant", "EB Garamond", Georgia, serif;
  --sans: "Manrope", "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;

  /* Layout */
  --max: 1280px;
  --gutter: clamp(20px, 4vw, 64px);
  --radius-sm: 6px;
  --radius: 14px;
  --radius-lg: 22px;

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
input, textarea, select { font-family: inherit; }

/* Typography ====================================== */
.eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--forest);
}
.eyebrow-copper { color: var(--copper); }
.eyebrow-ivory { color: var(--copper-soft); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--navy);
  line-height: 1.08;
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 6vw, 84px); letter-spacing: -0.025em; }
h2 { font-size: clamp(32px, 4.4vw, 60px); letter-spacing: -0.02em; }
h3 { font-size: clamp(22px, 2.2vw, 30px); }
h4 { font-size: 20px; font-weight: 600; }
.serif-italic { font-style: italic; font-weight: 400; }
.lede {
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.55;
  color: var(--ink-soft);
  text-wrap: pretty;
  max-width: 62ch;
}
p { text-wrap: pretty; }

/* Buttons ====================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 24px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: 999px;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--navy);
  color: var(--paper);
  border: 1px solid var(--navy);
}
.btn-primary:hover {
  background: var(--forest-dark);
  border-color: var(--forest-dark);
  transform: translateY(-1px);
}
.btn-copper {
  background: var(--copper);
  color: var(--navy-deep);
  border: 1px solid var(--copper);
}
.btn-copper:hover {
  background: var(--gold);
  border-color: var(--gold);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--navy);
}
.btn-outline:hover { background: var(--navy); color: var(--paper); }
.btn-ghost {
  background: transparent;
  color: var(--paper);
  border: 1px solid rgba(255,255,255,0.4);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); border-color: var(--paper); }
.btn-sm {
  padding: 12px 20px;
  font-size: 13px;
}
.btn .arrow { transition: transform 0.3s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* Container ====================================== */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.wrap-narrow { max-width: 960px; margin: 0 auto; padding: 0 var(--gutter); }

/* Section ====================================== */
section {
  padding: clamp(72px, 9vw, 140px) 0;
  position: relative;
}
section.tight { padding: clamp(48px, 6vw, 80px) 0; }
.bg-ivory { background: var(--ivory); }
.bg-paper { background: var(--paper); }
.bg-navy { background: var(--navy); color: var(--paper); }
.bg-navy h1, .bg-navy h2, .bg-navy h3, .bg-navy h4 { color: var(--paper); }
.bg-warm { background: var(--ivory-warm); }

/* NAV ====================================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: all 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled, .nav.solid {
  background: rgba(251,249,244,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line-soft);
  padding: 12px 0;
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.nav.on-dark:not(.scrolled) .nav-logo { color: var(--paper); }
.nav-logo-mark {
  display: inline-block;
  width: 38px; height: 42px;
  flex-shrink: 0;
  position: relative;
}
.nav-logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  position: absolute;
  inset: 0;
  transition: opacity 0.3s var(--ease);
}
.nav-logo-mark .logo-dark { opacity: 0; }
/* On dark/transparent hero: show light logo */
.nav.on-dark:not(.scrolled) .nav-logo-mark .logo-light { opacity: 1; }
.nav.on-dark:not(.scrolled) .nav-logo-mark .logo-dark { opacity: 0; }
.nav.on-dark:not(.scrolled) .nav-logo { color: var(--paper); }
/* Scrolled OR light backgrounds: show dark logo */
.nav.scrolled .nav-logo-mark .logo-light,
.nav:not(.on-dark) .nav-logo-mark .logo-light { opacity: 0; }
.nav.scrolled .nav-logo-mark .logo-dark,
.nav:not(.on-dark) .nav-logo-mark .logo-dark { opacity: 1; }
.nav.scrolled .nav-logo,
.nav:not(.on-dark) .nav-logo { color: var(--navy); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.005em;
}
.nav-links a {
  position: relative;
  color: var(--navy);
  transition: color 0.2s;
  padding: 6px 0;
}
.nav.on-dark:not(.scrolled) .nav-links a { color: var(--paper); }
.nav-links a:hover { color: var(--forest); }
.nav.on-dark:not(.scrolled) .nav-links a:hover { color: var(--copper-soft); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: currentColor;
}
.nav-cta {
  padding: 11px 20px;
  font-size: 13px;
  background: var(--navy);
  color: var(--paper);
  border-radius: 999px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: all 0.25s var(--ease);
  border: 1px solid var(--navy);
}
.nav.on-dark:not(.scrolled) .nav-cta {
  background: var(--copper);
  color: var(--navy);
  border-color: var(--copper);
}
.nav-cta:hover { background: var(--forest-dark); border-color: var(--forest-dark); color: var(--paper) !important; }

.nav-burger {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  color: var(--navy);
}
.nav.on-dark:not(.scrolled) .nav-burger { color: var(--paper); }
.nav-mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--navy);
  color: var(--paper);
  z-index: 200;
  padding: 80px 32px 40px;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}
.nav-mobile-menu.open { display: flex; }
.nav-mobile-menu a {
  padding: 16px 0;
  font-family: var(--serif);
  font-size: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: var(--paper);
}
.nav-mobile-close {
  position: absolute; top: 24px; right: 24px;
  width: 40px; height: 40px;
  color: var(--paper);
  display: flex; align-items: center; justify-content: center;
}

@media (max-width: 920px) {
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: flex; }
}

/* MOBILE STICKY CTA ============================== */
.mobile-cta {
  display: none;
  position: fixed;
  left: 16px; right: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  z-index: 90;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--copper);
  color: var(--navy);
  border-radius: 14px;
  text-decoration: none;
  font-family: inherit;
  box-shadow: 0 8px 32px -8px rgba(14, 26, 43, 0.4), 0 2px 6px rgba(14, 26, 43, 0.18);
  transition: transform 0.2s var(--ease, ease), box-shadow 0.2s var(--ease, ease);
  will-change: transform;
}
.mobile-cta:hover { transform: translateY(-2px); }
.mobile-cta-icon {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--copper-soft, var(--paper));
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.mobile-cta-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}
.mobile-cta-lead {
  font-weight: 600;
  font-size: 14px;
  line-height: 1.15;
  color: var(--navy);
  letter-spacing: 0.01em;
}
.mobile-cta-sub {
  font-size: 11px;
  line-height: 1.2;
  color: rgba(14, 26, 43, 0.66);
  letter-spacing: 0.02em;
}
.mobile-cta-arrow {
  color: var(--navy);
  flex-shrink: 0;
  opacity: 0.7;
}
@media (max-width: 768px) {
  .mobile-cta { display: flex; }
  /* push footer bottom-spacing up so it doesn't sit under the CTA */
  body { padding-bottom: 88px; }
}

/* FOOTER ====================================== */
.footer {
  background: var(--navy);
  color: var(--navy-100);
  padding: 100px 0 32px;
  font-size: 14px;
}
.footer h4 {
  color: var(--paper);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.footer a { color: var(--navy-100); transition: color 0.2s; }
.footer a:hover { color: var(--copper-soft); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 1.2fr;
  gap: 56px;
  margin-bottom: 80px;
}
.footer-brand-block .nav-logo-mark { filter: brightness(1.5); }
.footer-brand-text {
  font-family: var(--serif);
  font-size: 32px;
  color: var(--paper);
  margin-bottom: 6px;
}
.footer-brand-sub {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--copper-soft);
  margin-bottom: 28px;
}
.footer-baseline {
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  color: var(--paper);
  line-height: 1.4;
  max-width: 26ch;
}
.footer-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  color: var(--navy-300);
}
.footer-cert-row {
  display: flex; gap: 24px; align-items: center; margin-top: 18px;
  flex-wrap: wrap;
}
.footer-cert {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--paper);
  padding: 6px 12px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
}
@media (max-width: 920px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand-block { grid-column: 1 / -1; }
}

/* Reveal animation ====================================== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* Common patterns ====================================== */
.divider {
  display: inline-block;
  width: 48px; height: 1px;
  background: var(--copper);
  vertical-align: middle;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  background: var(--paper-pure);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--navy);
}
.tag-dark {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.15);
  color: var(--paper);
  backdrop-filter: blur(8px);
}
.tag-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--forest); }

.trust-row {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 28px;
  font-size: 13px;
  color: var(--ink-soft);
}
.trust-row span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.trust-row .check {
  width: 14px; height: 14px;
  color: var(--forest);
}
.trust-row.on-dark { color: rgba(255,255,255,0.85); }
.trust-row.on-dark .check { color: var(--copper-soft); }

/* Section header ====================================== */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 64px;
}
.section-head-text { max-width: 720px; }
.section-head .eyebrow { margin-bottom: 18px; display: inline-flex; align-items: center; gap: 14px; }
.section-head h2 + p { margin-top: 24px; }
@media (max-width: 768px) { .section-head { flex-direction: column; align-items: flex-start; } }

/* Cards ====================================== */
.card {
  background: var(--paper-pure);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  transition: all 0.4s var(--ease);
}
.card:hover {
  border-color: var(--navy-100);
  transform: translateY(-3px);
  box-shadow: 0 20px 60px -30px rgba(14,26,43,0.18);
}

/* Page hero used on inner pages ====================================== */
.page-hero {
  padding: 180px 0 80px;
  background: var(--navy);
  position: relative;
  color: var(--paper);
  overflow: hidden;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.page-hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(14, 26, 43, 0.45) 0%, rgba(14, 26, 43, 0.7) 60%, rgba(14, 26, 43, 0.92) 100%),
    linear-gradient(110deg, rgba(14, 26, 43, 0.55) 0%, rgba(14, 26, 43, 0.15) 60%);
}
.page-hero > .wrap {
  position: relative;
  z-index: 1;
}
.page-hero h1 { color: var(--paper); max-width: 22ch; }
.page-hero .lede { color: rgba(255,255,255,0.78); margin-top: 28px; max-width: 60ch; }
.page-hero .eyebrow { color: var(--copper-soft); margin-bottom: 22px; }
.page-hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: end;
}
.page-hero-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 28px;
  padding-bottom: 12px;
  font-size: 13px;
}
.page-hero-meta dt {
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--copper-soft); margin-bottom: 4px;
}
.page-hero-meta dd { color: rgba(255,255,255,0.85); margin-bottom: 12px; }
@media (max-width: 860px) {
  .page-hero { padding: 140px 0 64px; }
  .page-hero-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* Photo placeholder ====================================== */
.photo {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ivory-warm);
}
.photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.photo-caption {
  position: absolute;
  bottom: 16px; left: 16px;
  background: rgba(14,26,43,0.85);
  backdrop-filter: blur(8px);
  color: var(--paper);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* Utility ====================================== */
.mt-sm { margin-top: 16px; }
.mt { margin-top: 24px; }
.mt-lg { margin-top: 40px; }
.mt-xl { margin-top: 64px; }
.text-center { text-align: center; }
.muted { color: var(--ink-soft); }
.copper { color: var(--copper); }
.forest { color: var(--forest); }
.relative { position: relative; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Form ====================================== */
.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.field input, .field textarea, .field select {
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--paper-pure);
  border-radius: 8px;
  font-size: 15px;
  color: var(--navy);
  transition: border-color 0.2s, background 0.2s;
  outline: none;
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--forest);
  background: var(--paper);
}
.field textarea { min-height: 120px; resize: vertical; font-family: inherit; }

/* Number counter */
.num {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(48px, 6vw, 80px);
  color: var(--navy);
  letter-spacing: -0.03em;
  line-height: 1;
}
.num-suffix { font-size: 0.5em; color: var(--copper); margin-left: 4px; }

/* Floating ornament */
.ornament {
  position: absolute;
  pointer-events: none;
  opacity: 0.06;
}


/* ===========================================================
   MOBILE SAFETY NET — overrides at 480px and below
   Catches all common overflow and centering issues
   =========================================================== */

/* Universal horizontal-scroll lock — applies on every screen */
html, body {
  overflow-x: clip;
  max-width: 100vw;
}
body {
  position: relative;
  touch-action: pan-y;
}

@media (max-width: 480px) {
  /* Prevent any horizontal scroll */
  html, body { overflow-x: hidden; }

  /* Container padding tightening */
  .wrap { padding-left: 18px; padding-right: 18px; }

  /* Long-word safety: wrap urls, long words, etc */
  body, h1, h2, h3, h4, p, li, a, blockquote { word-break: normal; overflow-wrap: anywhere; }

  /* All images responsive */
  img, svg, video, iframe { max-width: 100%; height: auto; }

  /* Page hero — reduce padding for small phones */
  .page-hero { padding: 130px 0 60px; }
  .page-hero h1 { font-size: clamp(32px, 9vw, 44px); }
  .page-hero .lede { font-size: 15px; }

  /* Page hero meta — stack cleanly */
  .page-hero-meta {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 14px !important;
  }

  /* Form inputs: prevent iOS auto-zoom on focus (font-size >= 16px) */
  input, textarea, select, button { font-size: 16px; }

  /* Section padding */
  .section, section.bg-paper, section.bg-navy, section.bg-pure { padding: 64px 0; }

  /* Quick / stats / pillars grids → 1 col at very small */
  .quick-grid, .stats-grid { grid-template-columns: 1fr !important; gap: 24px !important; }
  .stats-grid .stat { padding: 24px 0; }

  /* Eyebrow & section titles stay readable */
  .eyebrow { font-size: 10px; letter-spacing: 0.14em; }

  /* Buttons full-width by default on tiny screens */
  .btn { padding: 14px 22px; font-size: 14px; }
  .btn-lg { padding: 16px 26px; font-size: 15px; }

  /* Footer adjustments */
  .footer-grid { grid-template-columns: 1fr !important; gap: 32px !important; }
  .footer-bottom {
    flex-direction: column !important;
    gap: 12px !important;
    text-align: center;
    font-size: 12px;
  }
}

/* TINY phones (≤360px) — emergency tightening */
@media (max-width: 360px) {
  .wrap { padding-left: 14px; padding-right: 14px; }
  h1 { font-size: clamp(26px, 8vw, 34px); }
  .btn { padding: 12px 18px; font-size: 13px; }
}