/* ============================================
   R-LINE MAATWERK — Design System
   Karen Hill (Creative Director) + Jimmy Conway (Architect)
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-black: #0a0a0a;
  --color-dark: #141414;
  --color-charcoal: #1a1a1a;
  --color-graphite: #2a2a2a;
  --color-steel: #3a3a3a;
  --color-grey: #888888;
  --color-light-grey: #cccccc;
  --color-off-white: #f0f0f0;
  --color-white: #ffffff;
  --color-accent: #E8850C;
  --color-accent-hover: #F09A2E;
  --color-accent-dark: #C06E08;
  --color-red: #d32f2f;
  --color-green: #2e7d32;

  /* Typography */
  --font-heading: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3.5rem;
  --fs-hero: clamp(2.5rem, 5vw, 4.5rem);

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 900;

  --lh-tight: 1.1;
  --lh-heading: 1.2;
  --lh-body: 1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-section: clamp(4rem, 8vw, 8rem);

  /* Grid */
  --container-max: 1200px;
  --container-wide: 1400px;
  --container-narrow: 800px;
  --grid-gap: 2rem;

  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --border-thin: 1px solid var(--color-graphite);
  --border-accent: 2px solid var(--color-accent);

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(232,133,12,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--color-off-white);
  background-color: var(--color-black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  content-visibility: auto;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: transparent;
  border: var(--border-thin);
  outline: none;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--color-accent);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading);
  color: var(--color-white);
}

h1 { font-size: var(--fs-hero); font-weight: var(--fw-black); letter-spacing: -0.02em; }
h2 { font-size: var(--fs-3xl); letter-spacing: -0.01em; }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-md); }

p { margin-bottom: var(--space-md); }

.text-accent { color: var(--color-accent); }
.text-grey { color: var(--color-grey); }
.text-sm { font-size: var(--fs-sm); }
.text-lg { font-size: var(--fs-lg); }
.text-center { text-align: center; }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.1em; }

.label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* --- Top Bar --- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 201;
  background: var(--color-dark);
  border-bottom: 1px solid var(--color-graphite);
  height: 36px;
}

.topbar-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.topbar-social {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.topbar-social a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-grey);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.topbar-social a:hover {
  color: var(--color-accent);
}

.topbar-social a svg {
  flex-shrink: 0;
}

.topbar-lang {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.topbar-lang a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: var(--fw-semibold);
  color: var(--color-grey);
  text-decoration: none;
  transition: all 0.2s ease;
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: 0.7;
  position: relative;
}

.topbar-lang a:hover {
  opacity: 1;
  color: var(--color-white);
}

.topbar-lang a.active {
  opacity: 1;
  color: var(--color-white);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

.topbar-lang .flag-icon {
  width: 20px;
  height: 14px;
  border-radius: 2px;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.1);
}

/* Tooltips */
.topbar-lang a[title]:hover::after {
  content: attr(title);
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-charcoal);
  color: var(--color-light-grey);
  font-size: 10px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.05em;
  text-transform: none;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  border: 1px solid var(--color-graphite);
  box-shadow: var(--shadow-sm);
  z-index: 10;
}

@media (max-width: 768px) {
  .topbar { height: 32px; }
  .topbar-inner { padding: 0 var(--space-md); }
  .topbar-social span { display: none; }
  .topbar-lang .flag-icon { width: 16px; height: 11px; }
  .topbar-lang a { font-size: 11px; gap: 4px; padding: 3px 6px; }
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 36px;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: background var(--transition-base);
}

.nav-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
}

.nav-logo img {
  height: 64px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  color: var(--color-light-grey);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  background: var(--color-accent);
  color: var(--color-black) !important;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-accent-hover);
  color: var(--color-black) !important;
  transform: translateY(-1px);
}

.nav-cta::after { display: none !important; }

/* Mobile Nav */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: var(--transition-fast);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10,10,10,0.85) 0%,
    rgba(10,10,10,0.6) 50%,
    rgba(10,10,10,0.4) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  padding-top: 124px;
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero p {
  font-size: var(--fs-lg);
  color: var(--color-light-grey);
  max-width: 600px;
  margin-bottom: var(--space-2xl);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-black);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-black);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-black);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--color-charcoal);
  color: var(--color-white);
  border: 1px solid var(--color-graphite);
}

.btn-dark:hover {
  background: var(--color-graphite);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 18px 40px;
  font-size: var(--fs-base);
}

.btn-sm {
  padding: 10px 20px;
  font-size: var(--fs-xs);
}

.btn-icon {
  font-size: 1.1em;
}

/* --- Cards --- */
.card {
  background: var(--color-charcoal);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.card-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.card-body {
  padding: var(--space-lg);
}

.card-body h3 {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-sm);
}

.card-body p {
  color: var(--color-grey);
  font-size: var(--fs-sm);
}

.card-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(232,133,12,0.1);
  color: var(--color-accent);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

/* --- Service Block --- */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  padding: var(--space-section) 0;
  border-bottom: 1px solid var(--color-graphite);
}

.service-block:nth-child(even) .service-img {
  order: -1;
}

.service-img {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.service-img img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.service-block:hover .service-img img {
  transform: scale(1.03);
}

.service-text .label {
  margin-bottom: var(--space-md);
  display: block;
}

.service-text h2 {
  margin-bottom: var(--space-lg);
}

.service-text p {
  color: var(--color-grey);
  margin-bottom: var(--space-xl);
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.service-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-light-grey);
  font-size: var(--fs-sm);
}

.service-features li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: var(--fw-bold);
}

/* --- Stats --- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
  text-align: center;
  padding: var(--space-3xl) 0;
}

.stat-number {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-black);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: var(--fs-sm);
  color: var(--color-grey);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Testimonials --- */
.testimonial {
  background: var(--color-charcoal);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  position: relative;
}

.testimonial::before {
  content: '"';
  font-size: 4rem;
  color: var(--color-accent);
  opacity: 0.3;
  position: absolute;
  top: 10px;
  left: 20px;
  line-height: 1;
}

.testimonial p {
  font-size: var(--fs-md);
  font-style: italic;
  color: var(--color-light-grey);
  margin-bottom: var(--space-lg);
}

.testimonial-author {
  font-weight: var(--fw-semibold);
  color: var(--color-white);
  font-size: var(--fs-sm);
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  border-top: 1px solid var(--color-graphite);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand p {
  color: var(--color-grey);
  font-size: var(--fs-sm);
  margin-top: var(--space-md);
  max-width: 300px;
}

.footer h4 {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
  color: var(--color-accent);
}

.footer ul li {
  margin-bottom: var(--space-sm);
}

.footer ul a {
  color: var(--color-grey);
  font-size: var(--fs-sm);
  transition: color var(--transition-fast);
}

.footer ul a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-graphite);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-xs);
  color: var(--color-grey);
}

.footer-lang {
  display: flex;
  gap: var(--space-md);
}

.footer-lang a {
  color: var(--color-grey);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-lang a:hover,
.footer-lang a.active {
  color: var(--color-accent);
}

/* --- Forms --- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-light-grey);
  margin-bottom: var(--space-sm);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-charcoal);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232,133,12,0.1);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-header .label {
  margin-bottom: var(--space-md);
  display: block;
}

.section-header h2 {
  margin-bottom: var(--space-lg);
}

.section-header p {
  color: var(--color-grey);
  font-size: var(--fs-md);
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-charcoal), var(--color-dark));
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-lg);
  padding: var(--space-4xl) var(--space-3xl);
  text-align: center;
}

.cta-banner h2 {
  margin-bottom: var(--space-lg);
}

.cta-banner p {
  color: var(--color-grey);
  font-size: var(--fs-md);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Page Headers --- */
.page-header {
  position: relative;
  padding: calc(124px + var(--space-4xl)) 0 var(--space-4xl);
  min-height: 45vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-header-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-header-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-header-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,10,0.85) 0%, rgba(10,10,10,0.6) 50%, rgba(10,10,10,0.4) 100%);
  z-index: 1;
}
.page-header > .container {
  position: relative;
  z-index: 2;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .service-block { grid-template-columns: 1fr; gap: var(--space-xl); }
  .service-block:nth-child(even) .service-img { order: 0; }
}

@media (max-width: 768px) {
  :root {
    --space-section: 3rem;
  }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 124px;
    left: 0;
    width: 100%;
    background: rgba(10,10,10,0.98);
    padding: var(--space-xl);
    gap: var(--space-lg);
    border-bottom: 1px solid var(--color-graphite);
  }

  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer-bottom { flex-direction: column; gap: var(--space-md); text-align: center; }

  .hero { min-height: 80vh; }
  .hero h1 { font-size: var(--fs-3xl); }

  .cta-banner { padding: var(--space-2xl) var(--space-lg); }
  .cta-buttons { flex-direction: column; align-items: center; }

  .btn-lg { width: 100%; justify-content: center; }
}

@media (max-width: 480px) {
  .container, .container-wide, .container-narrow {
    padding: 0 var(--space-md);
  }

  .stats { grid-template-columns: 1fr 1fr; }
  .stat-number { font-size: var(--fs-2xl); }
}

/* --- Utilities --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }