/* ============================================================
   LeefH2™ Fleet Savings Calculator
   Main stylesheet — brand system, layout, header, hero, footer
============================================================ */

:root {
  /* Brand colors */
  --color-green-primary:    #1E7A2E;
  --color-green-medium:     #2EA843;
  --color-green-light:      #D6EDD9;
  --color-green-dark:       #0D1F0F;
  --color-blue-brand:       #3A72B5;
  --color-orange-brand:     #F5A623;

  /* Backgrounds */
  --color-bg-page:          #FFFFFF;
  --color-bg-section:       #F4F6F4;
  --color-bg-card:          #FFFFFF;
  --color-bg-input:         #FFFFFF;
  --color-bg-engine-row:    #F8FAF8;

  /* Text */
  --color-text-primary:     #1A1A2E;
  --color-text-body:        #4A4A4A;
  --color-text-muted:       #888888;
  --color-text-hint:        #AAAAAA;

  /* Borders */
  --color-border-default:   #E0E0E0;
  --color-border-input:     #CCCCCC;
  --color-border-focus:     #1E7A2E;

  /* Status colors */
  --color-success-bg:       #D6EDD9;
  --color-success-border:   #2EA843;
  --color-success-text:     #1E7A2E;
  --color-danger-bg:        #FFF5F5;
  --color-danger-border:    #FFCCCC;
  --color-danger-text:      #CC3333;
  --color-info-bg:          #D6E4F7;
  --color-info-border:      #3A72B5;
  --color-info-text:        #1E4A8A;

  /* Fonts */
  --font-primary:           'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-display:           'Plus Jakarta Sans', 'Inter', sans-serif;

  /* Radii */
  --radius-sm:              6px;
  --radius-md:              10px;
  --radius-lg:              14px;
  --radius-xl:              20px;
  --radius-pill:            50px;

  /* Shadows */
  --shadow-card:            0 1px 4px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-card-hover:      0 4px 12px rgba(0,0,0,0.10), 0 8px 32px rgba(0,0,0,0.06);
  --shadow-header:          0 1px 12px rgba(0,0,0,0.08);

  /* Transitions */
  --transition-fast:        all 0.15s ease;
  --transition-med:         all 0.25s ease;
}

/* ============================================================
   GLOBAL RESET / BASE
============================================================ */

* { box-sizing: border-box; }

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

body {
  font-family: var(--font-primary);
  font-size: 15px;
  color: var(--color-text-body);
  line-height: 1.7;
  background: var(--color-bg-page);
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--color-green-light);
  color: var(--color-green-primary);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  margin-top: 0;
}

a {
  color: var(--color-blue-brand);
  text-decoration: none;
  transition: var(--transition-fast);
}
a:hover { color: var(--color-green-primary); }

img, svg { max-width: 100%; }

/* Bootstrap primary override */
.btn-primary {
  background-color: var(--color-green-primary);
  border-color: var(--color-green-primary);
  color: #FFFFFF;
  font-weight: 600;
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background-color: var(--color-green-medium) !important;
  border-color: var(--color-green-medium) !important;
  color: #FFFFFF !important;
}

.btn-outline-success {
  color: var(--color-green-primary);
  border-color: var(--color-green-primary);
  font-weight: 600;
}
.btn-outline-success:hover,
.btn-outline-success:focus {
  background-color: var(--color-green-primary);
  border-color: var(--color-green-primary);
  color: #FFFFFF;
}

.btn { font-size: 14px; font-weight: 600; }

/* ============================================================
   HEADER
============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-header);
  border-bottom: 1px solid var(--color-border-default);
}

.site-header .navbar {
  height: 70px;
  padding: 0;
}

.site-header .container-fluid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Logo images (header) */
.hno-logo-img {
  height: 42px;
  width: auto;
  object-fit: contain;
  display: block;
}

.leefh2-logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
  display: block;
  margin-right: 16px;
}

/* "How It Works" card logo */
.card-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  display: block;
  margin: 20px 24px 12px;
}

.header-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
  flex: 1;
  text-align: center;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.patent-badge {
  background: var(--color-green-light);
  border: 1px solid var(--color-green-medium);
  border-radius: var(--radius-pill);
  padding: 5px 14px;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-green-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.patent-badge i { font-size: 11px; }

.external-link {
  font-size: 12px;
  color: var(--color-blue-brand);
  font-weight: 500;
}
.external-link i { font-size: 10px; margin-left: 2px; }

.navbar-toggler {
  border: 1px solid var(--color-border-default);
  padding: 4px 8px;
}
.navbar-toggler:focus { box-shadow: none; }

/* ============================================================
   HERO SECTION
============================================================ */

.hero-section {
  background: var(--color-bg-section);
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--color-border-default);
  position: relative;
  overflow: hidden;
  background-image:
    radial-gradient(circle at 1px 1px, #E8EEE8 1px, transparent 0);
  background-size: 24px 24px;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(244,246,244,0.7) 0%,
    rgba(244,246,244,1) 100%);
  pointer-events: none;
}

.hero-section > .container { position: relative; z-index: 1; }

.eyebrow {
  font-family: var(--font-primary);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-green-primary);
  margin-bottom: 16px;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero-green {
  color: var(--color-green-primary);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 16px;
  color: var(--color-text-body);
  max-width: 520px;
  line-height: 1.6;
  margin-bottom: 12px;
}

/* Stat badges */
.stat-badge {
  border-radius: var(--radius-md);
  padding: 14px 20px;
  min-width: 140px;
  border: 1.5px solid var(--color-border-default);
}
.stat-badge__value {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.stat-badge__value--small { font-size: 16px; letter-spacing: 0; }
.stat-badge__label {
  font-size: 11px;
  font-weight: 600;
  line-height: 1.3;
}
.stat-badge--green {
  background: var(--color-success-bg);
  border-color: var(--color-success-border);
}
.stat-badge--green .stat-badge__value { color: var(--color-green-primary); }
.stat-badge--green .stat-badge__label { color: var(--color-green-medium); }

.stat-badge--blue {
  background: var(--color-info-bg);
  border-color: var(--color-info-border);
}
.stat-badge--blue .stat-badge__value { color: var(--color-blue-brand); }
.stat-badge--blue .stat-badge__label { color: var(--color-blue-brand); }

.stat-badge--dark {
  background: var(--color-green-dark);
  border-color: var(--color-green-medium);
}
.stat-badge--dark .stat-badge__value { color: #FFFFFF; font-size: 16px; font-weight: 700; }
.stat-badge--dark .stat-badge__label { color: var(--color-green-medium); font-size: 10px; font-weight: 500; }

.scroll-cta {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 28px;
}
.scroll-arrow {
  display: inline-block;
  animation: bounceArrow 2s infinite;
  font-weight: 700;
  color: var(--color-green-primary);
}
@keyframes bounceArrow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

/* How It Works card */
.how-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.how-card__topbar {
  height: 5px;
  background: linear-gradient(90deg, #1E7A2E, #2EA843, #3A72B5);
  width: 100%;
}
.how-card__header {
  padding: 0 24px 8px;
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
}
.how-steps {
  list-style: none;
  padding: 0;
  margin: 0;
}
.how-steps li {
  display: flex;
  align-items: flex-start;
  padding: 10px 24px;
  border-bottom: 1px solid #F0F0F0;
}
.how-steps li:last-child { border-bottom: none; }
.how-step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-green-primary);
  color: white;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  margin-right: 12px;
  margin-top: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.how-step-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
}
.how-step-desc {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.4;
}
.how-card__footer {
  background: #F8FAF8;
  padding: 12px 24px;
  border-top: 1px solid #F0F0F0;
  font-size: 10px;
  color: var(--color-text-hint);
}

/* ============================================================
   TRUST STRIP
============================================================ */

.trust-strip {
  background: var(--color-bg-section);
  border-top: 1px solid var(--color-border-default);
  border-bottom: 1px solid var(--color-border-default);
  padding: 36px 0;
}

.trust-item {
  text-align: center;
  padding: 12px;
}
.trust-item--divider {
  border-right: 1px solid var(--color-border-default);
}
.trust-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-green-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 10px;
  color: var(--color-green-primary);
  font-size: 22px;
}
.trust-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
}
.trust-sub {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ============================================================
   FOOTER
============================================================ */

.site-footer {
  background: var(--color-green-dark);
  color: #FFFFFF;
  padding: 52px 0 0;
}

/* Footer logo images */
.footer-hno-logo {
  height: 38px;
  width: auto;
  object-fit: contain;
  margin-bottom: 16px;
  display: block;
  /* Invert to white for the dark footer background.
     Remove this filter if you have a separate white-version logo. */
  filter: brightness(0) invert(1);
}

.footer-leefh2-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
  margin-top: 20px;
  display: block;
  opacity: 0.8;
}

.footer-tagline {
  font-size: 12px;
  color: #666666;
  line-height: 1.8;
  margin: 16px 0;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--color-green-medium);
  font-size: 13px;
  font-weight: 500;
}
.footer-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}
.footer-divider { color: #444; font-size: 13px; }

.footer-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-green-medium);
  margin-bottom: 16px;
  font-weight: 700;
}

.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
  color: #AAAAAA;
  font-size: 13px;
  line-height: 1.9;
}
.footer-list li i {
  color: var(--color-green-medium);
  margin-right: 10px;
  width: 16px;
  display: inline-block;
  text-align: center;
}
.footer-list a {
  color: var(--color-green-medium);
}
.footer-list a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-patents {
  line-height: 2.2;
  font-size: 12px;
}
.footer-patents .flag {
  font-size: 14px;
  margin-right: 6px;
}

.footer-fineprint {
  font-size: 10px;
  color: #555555;
  margin-top: 12px;
}

.footer-bottom {
  background: #070F07;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 18px 0;
  margin-top: 40px;
  text-align: center;
  font-size: 11px;
  color: #555555;
}

/* ============================================================
   PRINT HEADER (hidden on screen)
============================================================ */
.print-only { display: none; }

/* ============================================================
   TOAST
============================================================ */
.brand-toast {
  background: var(--color-green-primary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.brand-toast .toast-body {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 14px;
}
.brand-toast .toast-body i { font-size: 18px; }