/* ════════════════════════════════════════════
   BT-TIEN — Gedeelde stylesheet
   Alle pagina's laden dit bestand
   ════════════════════════════════════════════ */

:root {
  --ink:    #0F0E0C;
  --rust:   #B83A08;
  --rust-l: #D4460A;
  --steel:  #4A5A6A;
  --paper:  #F2EDE4;
  --accent: #E8E2D8;
  --bone:   #D4CCBE;
  --white:  #FAFAF8;
  --dark:   #161412;
  --ok:     #1E6B3C;
  --warn:   #C05000;
  --blue:   #1A4A8A;
  --gold:   #C9A84C;

  --sans:  'IBM Plex Sans', sans-serif;
  --serif: 'Playfair Display', serif;
  --mono:  'IBM Plex Mono', monospace;

  --radius: 0px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
}

/* ── RESET ── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a { text-decoration:none; color:inherit; }
img { max-width:100%; display:block; }

/* ── CONTAINER ── */
.container { max-width:1100px; margin:0 auto; padding:0 32px; }

/* ── BUTTONS ── */
.btn {
  display:inline-block;
  font-family:var(--mono);
  font-size:0.75rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  padding:14px 28px;
  border:2px solid transparent;
  cursor:pointer;
  transition:all 0.2s;
  white-space:nowrap;
}
.btn-primary {
  background:var(--rust);
  color:var(--white);
  border-color:var(--rust);
}
.btn-primary:hover {
  background:var(--rust-l);
  border-color:var(--rust-l);
}
.btn-ghost {
  background:transparent;
  color:var(--white);
  border-color:rgba(255,255,255,0.4);
}
.btn-ghost:hover {
  border-color:var(--white);
  background:rgba(255,255,255,0.08);
}
.btn-outline {
  background:transparent;
  color:var(--rust);
  border-color:var(--rust);
}
.btn-outline:hover { background:var(--rust); color:var(--white); }
.btn-dark {
  background:var(--ink);
  color:var(--white);
  border-color:var(--ink);
}
.btn-dark:hover { background:#333; border-color:#333; }

/* ════════════════════════════════════════════
   NAV
   ════════════════════════════════════════════ */
.nav {
  position:fixed;
  top:0; left:0; right:0;
  z-index:200;
  background:rgba(15,14,12,0.97);
  backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:all 0.3s;
}
.nav.scrolled { border-bottom-color:var(--rust); }
.nav-inner {
  max-width:1100px;
  margin:0 auto;
  padding:0 32px;
  height:60px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.nav-logo {
  font-family:var(--serif);
  font-size:1.2rem;
  color:var(--white);
  letter-spacing:0.05em;
}
.nav-logo span { color:var(--rust); }
.nav-links {
  display:flex;
  align-items:center;
  gap:32px;
}
.nav-links a {
  font-family:var(--mono);
  font-size:0.68rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:#aaa;
  transition:color 0.15s;
}
.nav-links a:hover { color:var(--white); }
.nav-cta {
  background:var(--rust) !important;
  color:var(--white) !important;
  padding:8px 18px;
  font-size:0.65rem !important;
}
.nav-cta:hover { background:var(--rust-l) !important; }
.nav-hamburger {
  display:none;
  background:none;
  border:none;
  color:var(--white);
  font-size:1.2rem;
  cursor:pointer;
}
.nav-mobile {
  display:none;
  flex-direction:column;
  padding:16px 32px;
  border-top:1px solid rgba(255,255,255,0.06);
}
.nav-mobile a {
  font-family:var(--mono);
  font-size:0.72rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:#aaa;
  padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,0.05);
}
.nav-mobile.open { display:flex; }

/* ════════════════════════════════════════════
   HERO
   ════════════════════════════════════════════ */
.hero {
  min-height:100vh;
  background:var(--dark);
  display:flex;
  align-items:center;
  padding:100px 32px 60px;
  max-width:100%;
  position:relative;
  overflow:hidden;
  gap:60px;
}
.hero-bg {
  position:absolute;
  inset:0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(184,58,8,0.12) 0%, transparent 70%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(255,255,255,0.02) 60px
    );
  pointer-events:none;
}
.hero-inner {
  max-width:560px;
  margin-left:auto;
  padding-left:max(32px, calc((100vw - 1100px) / 2));
  position:relative;
  z-index:1;
  flex-shrink:0;
}
.hero-tag {
  font-family:var(--mono);
  font-size:0.65rem;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--rust-l);
  margin-bottom:20px;
  display:flex;
  align-items:center;
  gap:10px;
}
.hero-tag::before {
  content:'';
  display:block;
  width:24px;
  height:1px;
  background:var(--rust);
}
.hero-title {
  font-family:var(--serif);
  font-size:clamp(2.5rem, 5vw, 4rem);
  color:var(--white);
  line-height:1.1;
  margin-bottom:24px;
}
.hero-title em {
  color:var(--rust-l);
  font-style:italic;
}
.hero-body {
  font-size:1rem;
  color:#aaa;
  line-height:1.75;
  margin-bottom:36px;
  max-width:440px;
}
.hero-actions {
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}

/* HERO VISUAL CARD */
.hero-visual {
  flex:1;
  display:flex;
  justify-content:center;
  align-items:center;
  padding-right:max(32px, calc((100vw - 1100px) / 2));
  position:relative;
  z-index:1;
}
.hero-card {
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.1);
  backdrop-filter:blur(10px);
  padding:28px;
  width:280px;
  position:relative;
}
.hero-card::before {
  content:'';
  position:absolute;
  top:0; left:0; right:0;
  height:2px;
  background:var(--rust);
}
.hcard-label {
  font-family:var(--mono);
  font-size:0.58rem;
  letter-spacing:0.15em;
  text-transform:uppercase;
  color:#666;
  margin-bottom:8px;
}
.hcard-building {
  font-family:var(--serif);
  font-size:1.3rem;
  color:var(--white);
  margin-bottom:20px;
}
.hcard-stats {
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:10px;
  margin-bottom:16px;
}
.hstat {
  text-align:center;
  background:rgba(255,255,255,0.04);
  padding:10px 6px;
}
.hstat-val {
  display:block;
  font-family:var(--serif);
  font-size:1.5rem;
  line-height:1;
  margin-bottom:4px;
}
.hstat-val.ok   { color:#4CAF7D; }
.hstat-val.warn { color:#E07040; }
.hstat-val.blue { color:#6090D0; }
.hstat-lbl {
  display:block;
  font-family:var(--mono);
  font-size:0.52rem;
  letter-spacing:0.08em;
  color:#666;
  text-transform:uppercase;
}
.hcard-footer {
  font-family:var(--mono);
  font-size:0.6rem;
  color:#555;
  padding-top:14px;
  border-top:1px solid rgba(255,255,255,0.06);
}

/* ════════════════════════════════════════════
   USP STRIP
   ════════════════════════════════════════════ */
.usp-strip {
  background:var(--ink);
  border-top:2px solid var(--rust);
  padding:56px 0;
}
.usp-grid {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:40px;
}
.usp-icon {
  font-size:1.4rem;
  color:var(--rust);
  margin-bottom:14px;
}
.usp-title {
  font-family:var(--serif);
  font-size:1rem;
  color:var(--white);
  margin-bottom:10px;
}
.usp-body {
  font-size:0.8rem;
  color:#777;
  line-height:1.7;
}

/* ════════════════════════════════════════════
   SECTIONS
   ════════════════════════════════════════════ */
.section { padding:80px 0; }
.section-dark {
  background:var(--ink);
  padding:80px 0;
}
.section-label {
  font-family:var(--mono);
  font-size:0.62rem;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--rust);
  margin-bottom:12px;
}
.section-title {
  font-family:var(--serif);
  font-size:clamp(1.8rem, 3vw, 2.6rem);
  color:var(--ink);
  margin-bottom:16px;
  line-height:1.2;
}
.section-intro {
  font-size:0.95rem;
  color:var(--steel);
  max-width:580px;
  line-height:1.75;
  margin-bottom:48px;
}

/* ── STEPS ── */
.steps { display:grid; grid-template-columns:1fr 1fr; gap:0; border:1px solid var(--bone); }
.step {
  display:flex;
  gap:24px;
  padding:32px;
  border-bottom:1px solid var(--bone);
  border-right:1px solid var(--bone);
}
.step:nth-child(even) { border-right:none; }
.step:nth-child(3), .step:nth-child(4) { border-bottom:none; }
.step-num {
  font-family:var(--serif);
  font-size:2rem;
  color:var(--bone);
  line-height:1;
  flex-shrink:0;
  width:48px;
}
.step-title {
  font-family:var(--serif);
  font-size:1.1rem;
  color:var(--ink);
  margin-bottom:10px;
}
.step p { font-size:0.82rem; color:var(--steel); line-height:1.75; }

/* ── FOR WHO ── */
.for-who-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin-top:40px; }
.for-who-card {
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.08);
  padding:28px;
  transition:border-color 0.2s;
}
.for-who-card:hover { border-color:var(--rust); }
.fw-icon { font-size:1.3rem; color:var(--rust); margin-bottom:14px; }
.fw-title {
  font-family:var(--serif);
  font-size:1.1rem;
  color:var(--white);
  margin-bottom:10px;
}
.for-who-card p { font-size:0.8rem; color:#777; line-height:1.75; }

/* ── CTA ── */
.cta-section {
  background:var(--rust);
  padding:60px 0;
}
.cta-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-title {
  font-family:var(--serif);
  font-size:1.8rem;
  color:var(--white);
  margin-bottom:10px;
}
.cta-body { font-size:0.85rem; color:rgba(255,255,255,0.75); }
.cta-section .btn-primary {
  background:var(--white);
  color:var(--rust);
  border-color:var(--white);
  flex-shrink:0;
}
.cta-section .btn-primary:hover { background:var(--paper); border-color:var(--paper); }

/* ════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════ */
.footer {
  background:var(--dark);
  border-top:1px solid rgba(255,255,255,0.06);
  padding:32px 0;
}
.footer-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:20px;
}
.footer-logo {
  font-family:var(--serif);
  font-size:1rem;
  color:var(--white);
}
.footer-logo span { color:var(--rust); }
.footer-links {
  display:flex;
  gap:28px;
}
.footer-links a {
  font-family:var(--mono);
  font-size:0.62rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:#555;
  transition:color 0.15s;
}
.footer-links a:hover { color:var(--white); }
.footer-copy {
  font-family:var(--mono);
  font-size:0.6rem;
  color:#444;
  letter-spacing:0.05em;
}

/* ════════════════════════════════════════════
   PAGE HERO (inner pages)
   ════════════════════════════════════════════ */
.page-hero {
  background:var(--dark);
  padding:120px 0 60px;
  border-bottom:2px solid var(--rust);
}
.page-hero-tag {
  font-family:var(--mono);
  font-size:0.62rem;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--rust);
  margin-bottom:14px;
}
.page-hero h1 {
  font-family:var(--serif);
  font-size:clamp(2rem, 4vw, 3.2rem);
  color:var(--white);
  line-height:1.15;
  margin-bottom:16px;
}
.page-hero p {
  font-size:0.95rem;
  color:#888;
  max-width:520px;
  line-height:1.75;
}

/* ════════════════════════════════════════════
   DIENSTEN PAGE
   ════════════════════════════════════════════ */
.dienst-grid { display:grid; grid-template-columns:1fr 1fr; gap:2px; background:var(--bone); margin-top:48px; }
.dienst-card { background:var(--white); padding:36px; }
.dienst-icon { font-size:1.5rem; color:var(--rust); margin-bottom:16px; }
.dienst-title {
  font-family:var(--serif);
  font-size:1.3rem;
  color:var(--ink);
  margin-bottom:14px;
}
.dienst-card p { font-size:0.82rem; color:var(--steel); line-height:1.8; margin-bottom:12px; }
.dienst-list { list-style:none; margin-top:16px; }
.dienst-list li {
  font-size:0.8rem;
  color:var(--steel);
  padding:6px 0;
  border-bottom:1px solid var(--accent);
  display:flex;
  gap:10px;
}
.dienst-list li::before { content:'—'; color:var(--rust); flex-shrink:0; }
.dienst-card.featured { background:var(--ink); grid-column:span 2; }
.dienst-card.featured .dienst-title { color:var(--white); }
.dienst-card.featured p { color:#888; }
.dienst-card.featured .dienst-list li { color:#888; border-color:rgba(255,255,255,0.06); }

/* ════════════════════════════════════════════
   OVER PAGE
   ════════════════════════════════════════════ */
.over-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:start; margin-top:48px; }
.over-body p { font-size:0.9rem; color:var(--steel); line-height:1.85; margin-bottom:20px; }
.over-body strong { color:var(--ink); }
.values { margin-top:48px; }
.values-title {
  font-family:var(--serif);
  font-size:1.4rem;
  margin-bottom:24px;
}
.value-item {
  display:flex;
  gap:20px;
  padding:20px 0;
  border-bottom:1px solid var(--bone);
}
.value-num {
  font-family:var(--mono);
  font-size:0.65rem;
  color:var(--rust);
  letter-spacing:0.1em;
  flex-shrink:0;
  width:28px;
  padding-top:3px;
}
.value-title {
  font-family:var(--serif);
  font-size:1rem;
  margin-bottom:6px;
}
.value-body { font-size:0.8rem; color:var(--steel); line-height:1.7; }
.over-aside {
  background:var(--ink);
  padding:32px;
  position:sticky;
  top:80px;
}
.aside-label {
  font-family:var(--mono);
  font-size:0.6rem;
  letter-spacing:0.15em;
  text-transform:uppercase;
  color:var(--rust);
  margin-bottom:20px;
}
.aside-stat {
  padding:20px 0;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.aside-stat:last-of-type { border-bottom:none; }
.aside-val {
  font-family:var(--serif);
  font-size:2rem;
  color:var(--white);
  line-height:1;
  margin-bottom:4px;
}
.aside-desc { font-size:0.75rem; color:#666; line-height:1.5; }

/* ════════════════════════════════════════════
   CONTACT PAGE
   ════════════════════════════════════════════ */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; margin-top:48px; }
.contact-info-item {
  display:flex;
  gap:16px;
  padding:20px 0;
  border-bottom:1px solid var(--bone);
}
.ci-icon { color:var(--rust); font-size:1rem; flex-shrink:0; width:20px; padding-top:2px; }
.ci-label {
  font-family:var(--mono);
  font-size:0.6rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--steel);
  margin-bottom:4px;
}
.ci-value { font-size:0.88rem; color:var(--ink); }

/* FORM */
.form { display:flex; flex-direction:column; gap:20px; }
.form-group { display:flex; flex-direction:column; gap:6px; }
.form-label {
  font-family:var(--mono);
  font-size:0.62rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--steel);
}
.form-input, .form-textarea, .form-select {
  font-family:var(--sans);
  font-size:0.88rem;
  color:var(--ink);
  background:var(--white);
  border:1px solid var(--bone);
  padding:12px 16px;
  outline:none;
  transition:border-color 0.2s;
  width:100%;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color:var(--rust);
}
.form-textarea { min-height:140px; resize:vertical; }
.form-select { appearance:none; cursor:pointer; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.form-note { font-size:0.72rem; color:var(--steel); font-style:italic; }

/* SUCCESS MESSAGE */
.form-success {
  display:none;
  background:var(--ok);
  color:white;
  padding:20px;
  font-family:var(--mono);
  font-size:0.75rem;
  letter-spacing:0.05em;
}

/* ════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════ */
@media (max-width:900px) {
  .hero { flex-direction:column; padding:80px 24px 48px; gap:40px; align-items:flex-start; }
  .hero-inner { padding-left:0; max-width:100%; }
  .hero-visual { padding-right:0; justify-content:flex-start; width:100%; }
  .hero-card { width:100%; max-width:400px; }
  .usp-grid { grid-template-columns:1fr 1fr; gap:28px; }
  .steps { grid-template-columns:1fr; }
  .step { border-right:none !important; }
  .step:nth-child(3) { border-bottom:1px solid var(--bone) !important; }
  .for-who-grid { grid-template-columns:1fr 1fr; }
  .dienst-grid { grid-template-columns:1fr; }
  .dienst-card.featured { grid-column:span 1; }
  .over-grid { grid-template-columns:1fr; }
  .over-aside { position:static; }
  .contact-grid { grid-template-columns:1fr; }
  .form-row { grid-template-columns:1fr; }
  .nav-links { display:none; }
  .nav-hamburger { display:block; }
  .cta-inner { flex-direction:column; text-align:center; }
  .cta-inner .btn { width:100%; text-align:center; }
  .section { padding:56px 0; }
  .section-dark { padding:56px 0; }
}
@media (max-width:600px) {
  .container { padding:0 20px; }
  .hero { padding:80px 20px 40px; gap:32px; }
  .hero-title { font-size:clamp(2rem, 8vw, 2.8rem); }
  .hero-card { max-width:100%; }
  .hero-actions { flex-direction:column; }
  .hero-actions .btn { width:100%; text-align:center; }
  .usp-grid { grid-template-columns:1fr; gap:24px; }
  .for-who-grid { grid-template-columns:1fr; }
  .steps { border:none; }
  .step { flex-direction:column; gap:12px; padding:24px 0; border:none !important; border-bottom:1px solid var(--bone) !important; }
  .step:last-child { border-bottom:none !important; }
  .step-num { width:auto; font-size:1.5rem; }
  .section { padding:40px 0; }
  .section-dark { padding:40px 0; }
  .section-intro { margin-bottom:32px; }
  .footer-inner { flex-direction:column; text-align:center; }
  .footer-links { flex-wrap:wrap; justify-content:center; }
  .cta-section { padding:40px 0; }
  .cta-title { font-size:1.4rem; }
  .usp-strip { padding:40px 0; }
}