/* ============================================================
   BBS — Biemans Business Solutions
   Design tokens & global styles
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,400&family=Inter:wght@300;400;500;600&display=swap');

:root {
  /* Palette — Light mode */
  --green-deep:    #1A3C2E;
  --green-mid:     #2D6A4F;
  --green-light:   #52B788;
  --cream:         #F7F5F0;
  --ink:           #111714;
  --body:          #374140;
  --muted:         #7A8C85;
  --white:         #FFFFFF;
  --border:        #D9DDD9;

  /* Semantic surface tokens (what components actually use) */
  --bg-page:       var(--cream);
  --bg-surface:    var(--white);
  --bg-subtle:     #F0EDE8;
  --text-heading:  var(--ink);
  --text-body:     var(--body);
  --text-muted:    var(--muted);
  --border-color:  var(--border);
  --nav-bg:        rgba(247, 245, 240, 0.94);

  /* Dark sections (hero, page-header, cta-banner) */
  --dark-bg:       var(--green-deep);
  --dark-text:     rgba(255,255,255,0.78);
  --dark-heading:  #FFFFFF;

  /* Typography */
  --font-display:  'DM Sans', sans-serif;
  --font-body:     'Inter', sans-serif;

  /* Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.375rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.25rem;
  --text-4xl:  3rem;
  --text-5xl:  4rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-width: 1120px;
  --nav-height: 72px;
  --radius: 4px;
  --radius-lg: 8px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 200ms;
}

/* ============================================================
   Dark mode token overrides
   ============================================================ */
[data-theme="dark"] {
  --bg-page:       #141C18;
  --bg-surface:    #1C2820;
  --bg-subtle:     #223028;
  --text-heading:  #E8F0EB;
  --text-body:     #A8BDB3;
  --text-muted:    #637A6F;
  --border-color:  #2A3D32;
  --nav-bg:        rgba(20, 28, 24, 0.94);

  /* In dark mode, the "dark" sections (hero, headers) get a lighter green
     so they still stand out from the page background */
  --dark-bg:       #243B2F;
  --dark-text:     rgba(232, 240, 235, 0.75);
  --dark-heading:  #E8F0EB;

  /* Adjust green-mid for better contrast on dark */
  --green-mid:     #3D8A64;
}

/* System preference fallback (used before JS runs) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-page:       #141C18;
    --bg-surface:    #1C2820;
    --bg-subtle:     #223028;
    --text-heading:  #E8F0EB;
    --text-body:     #A8BDB3;
    --text-muted:    #637A6F;
    --border-color:  #2A3D32;
    --nav-bg:        rgba(20, 28, 24, 0.94);
    --dark-bg:       #243B2F;
    --dark-text:     rgba(232, 240, 235, 0.75);
    --dark-heading:  #E8F0EB;
    --green-mid:     #3D8A64;
  }
}

/* ============================================================
   Particle canvas — fixed full-viewport, used on homepage + thank-you
   ============================================================ */
.hero__canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--text-body);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-heading);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); font-weight: 800; }
h2 { font-size: var(--text-3xl); font-weight: 700; }
h3 { font-size: var(--text-xl);  font-weight: 600; }
h4 { font-size: var(--text-lg);  font-weight: 600; }

p { max-width: 68ch; }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-light);
  display: block;
  margin-bottom: var(--space-3);
}

/* ============================================================
   Layout helpers
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section--dark {
  background: var(--dark-bg);
  color: var(--dark-text);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--dark-heading);
}

.section--dark .eyebrow {
  color: var(--green-light);
}

.section--dark p {
  color: var(--dark-text);
}

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              background var(--duration) var(--ease),
              border-color var(--duration) var(--ease);
  overflow: visible;
}

.nav.scrolled {
  height: 48px;
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  overflow: visible;
}

.nav__logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--green-deep);
  letter-spacing: -0.03em;
  position: relative;
  z-index: 102;
  transition: font-size 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              padding 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Single background element — collapsed when not scrolled */
.nav__logo::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 100%; /* collapsed: zero height */
  background: var(--green-deep);
  z-index: -1;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: none;
  pointer-events: none;
  transition: top 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.35s ease,
              background 0.35s ease;
}

[data-theme="dark"] .nav__logo {
  color: var(--green-light);
}

[data-theme="dark"] .nav__logo::before {
  background: var(--bg-subtle);
}

.nav__logo span {
  color: var(--green-light);
}

/* Scrolled: logo expands, ::before extends to top of screen */
.nav.scrolled .nav__logo {
  font-size: 1.45rem;
  color: var(--white);
  padding: 6px 16px 8px 14px;
  transform: translateY(16px) translateX(-10px);
}

.nav.scrolled .nav__logo::before {
  top: -200px; /* one seamless element from screen top to badge bottom */
  box-shadow: 0 8px 24px rgba(26,60,46,0.28);
}

.nav.scrolled .nav__logo span {
  color: var(--green-light);
}

[data-theme="dark"] .nav.scrolled .nav__logo {
  color: var(--text-heading);
}

[data-theme="dark"] .nav.scrolled .nav__logo::before {
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}

@media (max-width: 480px) {
  .nav.scrolled .nav__logo {
    transform: translateY(16px) translateX(-4px);
  }
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-body);
  transition: color var(--duration) var(--ease);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--green-light);
  transition: width var(--duration) var(--ease);
}

.nav__links a:hover { color: var(--text-heading); }
.nav__links a:hover::after { width: 100%; }
.nav__links a.active { color: var(--text-heading); font-weight: 700; }
.nav__links a.active::after { width: 100%; background: var(--green-light); height: 2px; }

.nav__lang {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.nav__lang button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius);
  transition: color var(--duration) var(--ease);
  opacity: 0.45;
}

.nav__lang button.active {
  color: var(--text-heading);
  opacity: 1;
}

.nav__lang button:not(.active):hover {
  color: var(--text-heading);
  opacity: 0.75;
}

.nav__lang-sep {
  color: var(--border);
  font-weight: 300;
}

/* Mobile menu toggle */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-2);
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-heading);
  transition: all var(--duration) var(--ease);
}

/* ── Theme toggle ── */
.nav__theme {
  background: none;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 5px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-body);
  transition: border-color var(--duration) var(--ease), color var(--duration) var(--ease), background var(--duration) var(--ease);
  font-size: 1rem;
  line-height: 1;
}

.nav__theme:hover {
  border-color: var(--green-light);
  color: var(--green-light);
}

/* Show correct icon per mode */
.nav__theme .icon-moon { display: inline-flex; }
.nav__theme .icon-sun  { display: none; }
[data-theme="dark"] .nav__theme .icon-moon { display: none; }
[data-theme="dark"] .nav__theme .icon-sun  { display: inline-flex; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--green-deep);
  color: var(--white);
  border-color: var(--green-deep);
}

.btn--primary:hover {
  background: var(--green-mid);
  border-color: var(--green-mid);
}

.btn--outline {
  background: transparent;
  color: var(--green-deep);
  border-color: var(--green-deep);
}

.btn--outline:hover {
  background: var(--green-deep);
  color: var(--white);
}

/* On dark backgrounds (hero, cta-banner, page-header), outline buttons need white treatment */
[data-theme="dark"] .btn--outline {
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}

[data-theme="dark"] .btn--outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
  color: var(--white);
}

.btn--outline-light {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}

.btn--outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
}

/* ============================================================
   Page header (used on inner pages)
   ============================================================ */
.page-header {
  background: var(--dark-bg);
  padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-16);
  color: var(--dark-heading);
}

.page-header h1 {
  color: var(--dark-heading);
  margin-bottom: var(--space-4);
}

.page-header p {
  color: var(--dark-text);
  font-size: var(--text-lg);
  max-width: 56ch;
}

/* ============================================================
   Signature element: the "slash" divider
   A green hairline that breaks across section transitions
   ============================================================ */
.slash-divider {
  width: 48px;
  height: 3px;
  background: var(--green-light);
  margin: var(--space-6) 0;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--duration) var(--ease), transform 0.1s ease, border-color var(--duration) var(--ease);
  will-change: transform;
  transform-style: preserve-3d;
  position: relative;
}

.card:hover {
  box-shadow: 0 12px 40px rgba(26,60,46,0.14);
}

/* Expandable cards */
.card[data-expandable] {
  cursor: pointer;
}

.card__toggle {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1.5px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: transform 0.35s var(--ease), border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
  flex-shrink: 0;
  pointer-events: none;
}

.card.expanded .card__toggle {
  transform: rotate(45deg);
  border-color: var(--green-light);
  color: var(--green-light);
  background: rgba(82,183,136,0.08);
}

.card.expanded {
  border-color: var(--green-light);
  box-shadow: 0 0 0 1px var(--green-light), 0 12px 40px rgba(82,183,136,0.12);
}

.card__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

.card.expanded .card__more {
  max-height: 500px;
  opacity: 1;
}

.card__more-inner {
  padding-top: var(--space-5);
  margin-top: var(--space-5);
  border-top: 1px solid var(--border-color);
}

.card__more-inner p {
  font-size: var(--text-sm);
  color: var(--text-body);
  line-height: 1.7;
}

.card__more-inner ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.card__more-inner ul li {
  font-size: var(--text-sm);
  color: var(--text-body);
  padding-left: var(--space-4);
  position: relative;
}

.card__more-inner ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green-light);
}

.card__icon {
  width: 40px;
  height: 40px;
  background: var(--green-deep);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  color: var(--green-light);
  font-size: 1.25rem;
}

/* ============================================================
   Grid utilities
   ============================================================ */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--ink);
  color: rgba(255,255,255,0.65);
  padding: var(--space-16) 0 var(--space-8);
}

[data-theme="dark"] .footer {
  background: #0D1410;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--white);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-2);
  display: block;
  white-space: nowrap;
}

.footer__brand span { color: var(--green-light); }

.footer__tagline {
  font-size: var(--text-sm);
  line-height: 1.6;
  max-width: 32ch;
  display: block;
}

.footer__col h4 {
  color: var(--white);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__col a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  transition: color var(--duration) var(--ease);
}

.footer__col a:hover { color: var(--white); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

/* ============================================================
   Language toggle — hide/show
   ============================================================ */
[data-lang] { display: none; }
[data-lang].lang-active { display: block; }
[data-lang-inline] { display: none; }
[data-lang-inline].lang-active { display: inline; }

/* For flex children */
[data-lang-flex] { display: none; }
[data-lang-flex].lang-active { display: flex; }

/* ============================================================
   Form
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-heading);
}

.form-group input,
.form-group textarea,
.form-group select {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--text-heading);
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--green-mid);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

/* ============================================================
   Utilities
   ============================================================ */
.text-center { text-align: center; }
.text-muted  { color: var(--muted); }
.mt-2  { margin-top: var(--space-2); }
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-2  { margin-bottom: var(--space-2); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }
.flex  { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-2xl); }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer__inner > :first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  :root { --nav-height: 64px; }

  h1 { font-size: var(--text-3xl); }

  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-page);
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-color);
    gap: var(--space-4);
    align-items: flex-start;
  }

  .nav__hamburger { display: flex; }

  .grid-2,
  .grid-3 { grid-template-columns: 1fr; }

  .footer__inner { grid-template-columns: 1fr; }

  .section { padding: var(--space-16) 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}