/* ==========================================================================
   SWISS INDUSTRIAL DESIGN TOKENS (Technical Manual & Concrete Canvas)
   ========================================================================== */
:root {
  --swiss-canvas: #ECEBE6; /* Warm industrial concrete blueprint base */
  --swiss-paper: #F5F4F0;  /* Technical paper surface for cards/forms */
  --swiss-white: #F5F4F0;  /* Backward compatible: maps to warm paper */
  --swiss-black: #121315;  /* Deep asphalt / oil black */
  --swiss-muted: #DFDED8;  /* Industrial concrete / mechanical gray */
  --swiss-red: #D12500;    /* Darkened Swiss Red: 4.80:1 on paper, 5.28:1 on white (WCAG AA) */
  --swiss-gray: #626569;   /* Industrial steel gray */
  --border-thick: 4px solid var(--swiss-black);
  --border-thin: 2px solid var(--swiss-black);
  --font-swiss: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

/* ==========================================================================
   UNIVERSAL RESETS (0px Radius & Flatness)
   ========================================================================== */
*, *::before, *::after,
.btn, .form-control, .card, .alert, details, summary, input, .modal-content {
  border-radius: 0 !important;
  box-shadow: none !important;
}

/* Skip link: visible on keyboard focus only */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1055;
  background-color: var(--swiss-black);
  color: var(--swiss-paper);
  padding: 0.75rem 1rem;
  font-weight: 800;
  text-transform: uppercase;
  text-decoration: none;
}
.skip-link:focus {
  top: 1rem;
  color: var(--swiss-paper);
}

/* Global visible focus (3:1+ against paper for every element) */
:focus-visible {
  outline: 3px solid var(--swiss-red);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}

body {
  background-color: var(--swiss-canvas);
  color: var(--swiss-black);
  font-family: var(--font-swiss);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.bg-white {
  background-color: var(--swiss-paper) !important;
}

/* ==========================================================================
   CSS TEXTURES & PATTERNS (Visual depth without shadows)
   ========================================================================== */
/* 1. Global SVG Paper Noise Overlay */
.swiss-noise {
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.045'/%3E%3C/svg%3E");
}

/* 2. Grid Pattern (24x24px, 5% opacity on industrial canvas) */
.swiss-grid-pattern {
  background-color: var(--swiss-canvas);
  background-image:
    linear-gradient(to right, rgba(18, 19, 21, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(18, 19, 21, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 3. Dot Matrix (16x16px, 10% opacity) */
.swiss-dots {
  background-color: var(--swiss-muted);
  background-image: radial-gradient(rgba(18, 19, 21, 0.1) 1.5px, transparent 1.5px);
  background-size: 16px 16px;
}

/* 4. Diagonal Lines (45deg, 4% opacity) */
.swiss-diagonal {
  background-image: repeating-linear-gradient(
    45deg,
    rgba(18, 19, 21, 0.04),
    rgba(18, 19, 21, 0.04) 1px,
    transparent 0,
    transparent 10px
  );
}

/* ==========================================================================
   TYPOGRAPHY (Flush-Left, Massive Scales, Tight Tracking)
   ========================================================================== */
h1, h2, h3, .font-heading {
  font-family: var(--font-swiss);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  line-height: 0.95;
  color: var(--swiss-black);
}

.hero-h1 {
  font-size: clamp(2.5rem, 6.5vw + 1rem, 5.5rem);
  margin-bottom: 1.5rem;
}

.section-h2 {
  font-size: clamp(2rem, 3.5vw + 1rem, 3.25rem);
  margin-bottom: 0;
}

.section-index {
  font-family: var(--font-swiss);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--swiss-red);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.section-index::after {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background-color: var(--swiss-red);
}

.lead-swiss {
  font-size: clamp(1.1rem, 1.2vw + 0.5rem, 1.35rem);
  line-height: 1.5;
  font-weight: 500;
  max-width: 55ch;
  color: var(--swiss-black);
}

.text-measure {
  max-width: 65ch;
}

/* ==========================================================================
   STRUCTURAL BORDERS
   ========================================================================== */
.border-b-4 { border-bottom: var(--border-thick) !important; }
.border-r-4 { border-right: var(--border-thick) !important; }
.border-4-all { border: var(--border-thick) !important; }

.border-b-2 { border-bottom: var(--border-thin) !important; }
.border-t-2 { border-top: var(--border-thin) !important; }
.border-r-2 { border-right: var(--border-thin) !important; }
.border-2-all { border: var(--border-thin) !important; }

/* ==========================================================================
   BUTTONS & INTERACTIVE ELEMENTS
   ========================================================================== */
.btn-swiss-red {
  background-color: var(--swiss-red);
  color: var(--swiss-white);
  border: 4px solid var(--swiss-red);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  min-height: 56px;
  padding: 1rem 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: all 0.15s ease-out;
}

.btn-swiss-red:hover {
  background-color: var(--swiss-black);
  border-color: var(--swiss-black);
  color: var(--swiss-white);
}

.btn-swiss-red:focus-visible {
  outline: 3px solid var(--swiss-red);
  outline-offset: 4px;
}

.btn-swiss-black {
  background-color: var(--swiss-black);
  color: var(--swiss-white);
  border: 4px solid var(--swiss-black);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  min-height: 56px;
  padding: 1rem 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all 0.15s ease-out;
}

.btn-swiss-black:hover {
  background-color: var(--swiss-red);
  border-color: var(--swiss-red);
  color: var(--swiss-white);
}

.btn-swiss-outline-sm {
  background-color: var(--swiss-white);
  color: var(--swiss-black);
  border: 2px solid var(--swiss-black);
  font-size: 0.8125rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  transition: all 0.15s ease-out;
}

.btn-swiss-outline-sm:hover {
  background-color: var(--swiss-black);
  color: var(--swiss-white);
}

.chip-btn {
  background-color: var(--swiss-white);
  color: var(--swiss-black);
  border: 1px solid var(--swiss-black);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.15s ease-out;
}

.chip-btn:hover {
  background-color: var(--swiss-red);
  color: var(--swiss-white);
  border-color: var(--swiss-red);
}

.swiss-phone-link {
  color: var(--swiss-black);
  text-decoration: none;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.4rem 0.6rem;
  border: 2px solid var(--swiss-black);
  transition: all 0.15s ease-out;
  display: inline-block;
}

.swiss-phone-link:hover {
  background-color: var(--swiss-black);
  color: var(--swiss-white);
}

/* ==========================================================================
   FORM INPUTS
   ========================================================================== */
.form-control-swiss {
  border: 2px solid var(--swiss-black);
  color: var(--swiss-black);
  padding: 0.95rem 1rem;
  background-color: var(--swiss-white);
  font-weight: 500;
  font-size: 1rem;
  transition: border-color 0.15s ease;
}

.form-control-swiss:focus {
  border-color: var(--swiss-red);
  outline: 2px solid var(--swiss-red);
  background-color: var(--swiss-white);
  color: var(--swiss-black);
}

.invalid-feedback {
  color: var(--swiss-red);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  margin-top: 0.35rem;
}

/* ==========================================================================
   CARDS & ACCORDION (FAQ)
   ========================================================================== */
.swiss-card {
  background-color: var(--swiss-white);
  border: var(--border-thin);
  padding: 2rem;
  height: 100%;
  transition: all 0.15s ease-out;
}

.swiss-card:hover {
  background-color: var(--swiss-black);
  color: var(--swiss-white);
  border-color: var(--swiss-black);
  transform: translateY(-2px);
}

.swiss-card:hover h3, 
.swiss-card:hover p, 
.swiss-card:hover .card-meta {
  color: var(--swiss-white) !important;
}

.card-icon-frame {
  width: 52px;
  height: 52px;
  border: 2px solid var(--swiss-black);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  background-color: var(--swiss-muted);
  transition: all 0.15s ease-out;
}

/* ==========================================================================
   BOOTSTRAP ACCORDION (SWISS STYLE)
   ========================================================================== */
.swiss-accordion {
  --bs-accordion-border-width: 2px;
  --bs-accordion-border-color: var(--swiss-black);
  --bs-accordion-border-radius: 0;
  --bs-accordion-inner-border-radius: 0;
  --bs-accordion-bg: var(--swiss-white);
  --bs-accordion-btn-bg: var(--swiss-white);
  --bs-accordion-btn-color: var(--swiss-black);
  --bs-accordion-active-bg: var(--swiss-white);
  --bs-accordion-active-color: var(--swiss-black);
  --bs-accordion-btn-focus-box-shadow: none;
  --bs-accordion-btn-focus-border-color: var(--swiss-black);
  --bs-accordion-btn-active-icon: var(--bs-accordion-btn-icon);
  --bs-accordion-btn-icon-transition: transform 0.25s ease-out;
}

.swiss-accordion .accordion-item {
  border: var(--border-thin);
  background-color: var(--swiss-white);
  margin-bottom: -2px; /* Collapsed borders */
}

.swiss-accordion .accordion-button {
  padding: 1.5rem;
  font-weight: 800;
  text-transform: uppercase;
  font-size: 1.15rem;
  color: var(--swiss-black);
  background-color: var(--swiss-white);
  box-shadow: none !important;
  border: 0 !important;
  transition: background-color 0.15s ease-out, color 0.15s ease-out;
}

.swiss-accordion .accordion-button:hover {
  background-color: var(--swiss-black);
  color: var(--swiss-white);
}

.swiss-accordion .accordion-button:hover::after {
  filter: invert(1);
}

.swiss-accordion .accordion-button::after {
  transition: transform 0.25s ease-out;
}

.swiss-accordion .collapsing {
  transition: height 0.25s ease-out;
}

.swiss-accordion .accordion-body {
  padding: 1.5rem;
  background-color: var(--swiss-muted);
  font-size: 1.05rem;
  color: var(--swiss-black);
  border-top: 2px solid var(--swiss-black);
}

/* ==========================================================================
   BADGES & ALERTS
   ========================================================================== */
.swiss-accent-tag {
  background-color: var(--swiss-red);
  color: var(--swiss-white);
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: inline-block;
}

#formSuccessMsg {
  display: none;
  background-color: var(--swiss-black);
  color: var(--swiss-white);
  border: 4px solid var(--swiss-red);
  padding: 1.5rem;
}

/* ==========================================================================
   BOOTSTRAP MODAL OVERRIDES
   ========================================================================== */
.modal-content.swiss-modal {
  border: 4px solid var(--swiss-black);
  background-color: var(--swiss-white);
}

.modal-header.swiss-modal-header {
  border-bottom: 2px solid var(--swiss-black);
  padding: 1.5rem;
}

.modal-body.swiss-modal-body {
  padding: 2rem 1.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

.modal-footer.swiss-modal-footer {
  border-top: 2px solid var(--swiss-black);
  padding: 1rem 1.5rem;
}

/* ==========================================================================
   INDUSTRIAL WORKSHOP PHOTOGRAPHY & CROP-MARKS
   ========================================================================== */
.swiss-crop-frame {
  position: relative;
  background-color: var(--swiss-black);
  border: var(--border-thin);
  overflow: hidden;
  display: block;
}

.swiss-crop-frame.thick {
  border: var(--border-thick);
}

.swiss-crop-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(20%) contrast(112%);
  transition: filter 0.25s ease-out, transform 0.25s ease-out;
}

.swiss-crop-frame:hover img {
  filter: grayscale(0%) contrast(105%);
}

/* Technical corner registration marks [+] */
.swiss-crop-frame::before,
.swiss-crop-frame::after {
  content: "+";
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 900;
  line-height: 1;
  color: var(--swiss-red);
  background-color: rgba(18, 19, 21, 0.9);
  padding: 3px 5px;
  z-index: 2;
  pointer-events: none;
  letter-spacing: 0;
}

.swiss-crop-frame::before {
  top: 10px;
  left: 10px;
}

.swiss-crop-frame::after {
  bottom: 10px;
  right: 10px;
}

/* ==========================================================================
   TECHNICAL COORDINATE BADGES & WORKSHOP ATMOSPHERE
   ========================================================================== */
.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background-color: var(--swiss-black);
  color: var(--swiss-paper);
  border: 1px solid var(--swiss-black);
  padding: 0.3rem 0.65rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
}

.tech-badge-red {
  background-color: var(--swiss-red);
  color: var(--swiss-paper);
  border-color: var(--swiss-red);
}