/* ============================================================
   THEIS CONSTRUCTION — SITE STYLESHEET
   Brand: Black + White dominant, red accent <20%
   ============================================================ */

:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3.5rem, 1rem + 8vw, 9rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Theis Brand Colors */
  --color-bg: #0a0a0a;
  --color-surface: #111111;
  --color-surface-2: #1a1a1a;
  --color-border: #2a2a2a;
  --color-text: #f0f0f0;
  --color-text-muted: #888888;
  --color-text-faint: #555555;
  --color-accent: #cc1f1f;
  --color-accent-hover: #e62424;
  --color-white: #ffffff;
  --color-black: #000000;

  --font-display: 'Bebas Neue', 'Impact', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  --content-default: 1160px;
  --content-narrow: 760px;
  --nav-h: 72px;
}

/* ── RESET ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-body); font-size: var(--text-base); color: var(--color-text); background: var(--color-bg); line-height: 1.65; min-height: 100dvh; }
img, picture, video { display: block; max-width: 100%; height: auto; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
h1,h2,h3,h4,h5,h6 { line-height: 1.1; text-wrap: balance; }

/* ── TYPOGRAPHY ─────────────────────────────────────────── */
.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}
h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-white);
  line-height: 1.05;
  letter-spacing: 0.02em;
}
h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}
p { max-width: 64ch; color: var(--color-text); }

/* ── LAYOUT ─────────────────────────────────────────────── */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section-alt { background: var(--color-surface); }
.section-dark { background: var(--color-black); }
.section-header {
  text-align: center;
  max-width: 860px;
  margin-inline: auto;
  margin-bottom: clamp(var(--space-12), 5vw, var(--space-20));
}
.section-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-5);
  max-width: 72ch;
  margin-inline: auto;
}

/* SPLIT LAYOUT */
.container-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 5vw, var(--space-20));
  align-items: center;
}
.container-split-reverse { direction: rtl; }
.container-split-reverse > * { direction: ltr; }
.split-image { border-radius: var(--radius-md); overflow: hidden; }
.split-image img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.6s ease; }
.split-image:hover img { transform: scale(1.03); }
.split-text { display: flex; flex-direction: column; gap: var(--space-5); }
.split-text p { color: var(--color-text-muted); font-size: var(--text-base); }

/* ── NAV ─────────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.site-nav.nav-hidden { transform: translateY(-100%); }
.site-nav.nav-scrolled { box-shadow: 0 4px 32px rgba(0,0,0,0.5); }
.nav-inner {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 4vw, var(--space-12));
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.nav-logo-text {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-white);
  line-height: 1.3;
}
.nav-logo-text strong { display: block; font-weight: 700; letter-spacing: 0.18em; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: nowrap;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--color-white); }
.nav-cta {
  background: var(--color-accent);
  color: var(--color-white) !important;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-sm);
  font-weight: 700 !important;
  transition: background var(--transition) !important;
}
.nav-cta:hover { background: var(--color-accent-hover) !important; }
.nav-mobile-toggle { display: none; flex-direction: column; gap: 5px; padding: var(--space-2); }
.nav-mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--color-white); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.nav-mobile-menu { display: none; flex-direction: column; background: #000; padding: var(--space-6) clamp(var(--space-6), 5vw, var(--space-12)); gap: var(--space-5); border-top: 1px solid var(--color-border); }
.nav-mobile-menu a { font-size: var(--text-base); font-weight: 500; color: var(--color-text-muted); }
.nav-mobile-menu a:hover { color: var(--color-white); }
.nav-mobile-menu.open { display: flex; }

/* ── HERO ────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-img { width: 100%; height: 100%; object-fit: cover; object-position: center 35%; filter: brightness(0.35); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(0,0,0,0.85) 0%,
    rgba(0,0,0,0.4) 60%,
    rgba(204,31,31,0.12) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 1;
  padding: var(--nav-h) clamp(var(--space-8), 8vw, var(--space-32)) var(--space-16);
  max-width: 900px;
}
.hero-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
  display: inline-block;
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-3);
}
.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  color: var(--color-white);
  line-height: 0.9;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-8);
  text-shadow: 0 4px 40px rgba(0,0,0,0.5);
}
.hero-sub {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.05em;
  font-weight: 500;
  margin-bottom: var(--space-10);
  max-width: 100%;
}
.hero-cta-group { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-10);
  left: clamp(var(--space-8), 8vw, var(--space-32));
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: rgba(255,255,255,0.4);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border: 2px solid var(--color-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(204,31,31,0.4); }
.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { border-color: var(--color-white); background: rgba(255,255,255,0.08); transform: translateY(-2px); }
.btn-lg { padding: var(--space-5) var(--space-12); font-size: var(--text-base); }

/* ── CHALLENGES GRID ─────────────────────────────────────── */
.challenges-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.challenge-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  transition: border-color var(--transition), transform var(--transition);
}
.challenge-card:hover { border-color: var(--color-accent); transform: translateY(-3px); }
.challenge-icon {
  width: 48px;
  height: 48px;
  background: rgba(204,31,31,0.12);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}
.challenge-card h3 { font-size: var(--text-base); font-weight: 700; margin-bottom: var(--space-3); }
.challenge-card p { font-size: var(--text-sm); color: var(--color-text-muted); max-width: none; }

/* ── FEATURES GRID ───────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-6);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.feature-card:hover { border-color: var(--color-text-muted); transform: translateY(-3px); }
.feature-card-accent { background: var(--color-surface-2, #1a1a1a); border-color: rgba(204,31,31,0.3); }
.feature-card-accent:hover { border-color: var(--color-accent); }
.feature-num {
  font-family: var(--font-display);
  font-size: clamp(3rem, 4vw, 4.5rem);
  color: rgba(255,255,255,0.06);
  line-height: 1;
  position: absolute;
  top: var(--space-3);
  right: var(--space-5);
}
.feature-card h3 { font-size: var(--text-sm); font-weight: 700; margin-bottom: var(--space-3); position: relative; }
.feature-card p { font-size: var(--text-sm); color: var(--color-text-muted); position: relative; max-width: none; }

/* ── PANEL COMPARISON ────────────────────────────────────── */
.panel-comparison-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-10);
  align-items: start;
}
.panel-col { display: flex; flex-direction: column; gap: var(--space-6); }
.panel-col-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: 0.04em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
}
.panel-col-label-standard { background: #1e1e1e; color: var(--color-text-muted); }
.panel-col-label-theis { background: var(--color-accent); color: var(--color-white); }
.panel-diagram-img { width: 100%; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.panel-desc { font-size: var(--text-sm); color: var(--color-text-muted); max-width: none; line-height: 1.7; }
.panel-feature-list { display: flex; flex-direction: column; gap: var(--space-4); padding: 0; }
.panel-feature-list li { font-size: var(--text-sm); color: var(--color-text-muted); padding-left: var(--space-4); border-left: 2px solid var(--color-accent); }
.panel-feature-list li strong { color: var(--color-white); }
.panel-tagline { font-family: var(--font-body); font-size: var(--text-base); font-weight: 700; color: var(--color-white); border-top: 1px solid var(--color-border); padding-top: var(--space-5); }
.panel-vs-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--space-12);
}
.panel-vs-divider span {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-accent);
  writing-mode: vertical-rl;
  letter-spacing: 0.1em;
}

/* ── GALLERY ─────────────────────────────────────────────── */
.gallery-fullbleed { width: 100%; overflow: hidden; }
.gallery-fullbleed-img { width: 100%; height: auto; display: block; }

/* ── COMPARISON CHART ────────────────────────────────────── */
.comparison-chart-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-12);
  border: 1px solid var(--color-border);
}
.comparison-chart-img { width: 100%; height: auto; display: block; }
.comparison-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-5);
}
.metric { display: flex; flex-direction: column; gap: var(--space-2); }
.metric-bar {
  width: 100%;
  height: 4px;
  background: var(--color-border);
  border-radius: 99px;
  overflow: hidden;
}
.metric-fill {
  height: 100%;
  width: var(--pct);
  background: var(--color-accent);
  border-radius: 99px;
}
.metric-label { font-size: var(--text-xs); color: var(--color-text-muted); letter-spacing: 0.04em; }
.metric-score { font-size: var(--text-sm); font-weight: 700; color: var(--color-white); }

/* ── CTA SECTION ─────────────────────────────────────────── */
.cta-section {
  position: relative;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
  overflow: hidden;
  text-align: center;
}
.cta-bg { position: absolute; inset: 0; z-index: 0; }
.cta-bg-img { width: 100%; height: 100%; object-fit: cover; filter: brightness(0.25); }
.cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.6), rgba(204,31,31,0.15), rgba(0,0,0,0.7));
}
.cta-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
}
.cta-heading {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-white);
  letter-spacing: 0.04em;
  max-width: 800px;
}

/* ── CONTACT ─────────────────────────────────────────────── */
.section-contact { background: var(--color-surface); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-12), 6vw, var(--space-24));
  align-items: center;
}
.contact-brand { display: flex; flex-direction: column; gap: var(--space-5); }
.contact-brand-name {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  line-height: 1.6;
}
.contact-brand-name span { display: block; }
.contact-brand-name strong { display: block; font-weight: 800; font-size: var(--text-sm); color: var(--color-white); }
.contact-brand-tag { font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-white); letter-spacing: 0.05em; }
.contact-brand-sub { font-size: var(--text-xs); color: var(--color-text-faint); letter-spacing: 0.1em; text-transform: uppercase; }
.contact-info { display: flex; flex-direction: column; gap: var(--space-8); }
.contact-details { display: flex; flex-direction: column; gap: var(--space-5); }
.contact-detail { display: flex; align-items: center; gap: var(--space-4); }
.contact-detail svg { color: var(--color-accent); flex-shrink: 0; }
.contact-detail a { font-size: var(--text-base); color: var(--color-text-muted); transition: color var(--transition); }
.contact-detail a:hover { color: var(--color-white); }

/* ── FOOTER ──────────────────────────────────────────────── */
.site-footer { background: var(--color-black); border-top: 1px solid var(--color-border); padding-block: var(--space-8); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: var(--space-6); flex-wrap: wrap; }
.site-footer p { font-size: var(--text-xs); color: var(--color-text-faint); max-width: none; }
.footer-tag { font-family: var(--font-display); letter-spacing: 0.08em; color: var(--color-text-faint) !important; }

/* ── SCROLL ANIMATIONS ───────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .challenges-grid { grid-template-columns: repeat(2, 1fr); }
  .panel-comparison-grid { grid-template-columns: 1fr; }
  .panel-vs-divider { padding: var(--space-4) 0; }
  .panel-vs-divider span { writing-mode: horizontal-tb; }
}

@media (max-width: 768px) {
  /* Nav */
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }

  /* Hero */
  .hero { min-height: 100dvh; }
  .hero-bg { top: 0; bottom: 0; overflow: hidden; }
  .hero-img { object-position: center 30%; }
  .hero-content {
    padding-inline: var(--space-6);
    padding-top: calc(var(--nav-h) + var(--space-10));
    padding-bottom: var(--space-12);
  }
  .hero-title { font-size: clamp(3rem, 12vw, 5rem); }
  .hero-sub {
    font-size: var(--text-xs);
    line-height: 1.8;
  }
  .hero-scroll-hint { display: none; }

  /* Problem section — hide the slide image on mobile, just show text */
  .container-split { grid-template-columns: 1fr; }
  .container-split-reverse { direction: ltr; }
  .split-image { display: none; }

  /* Challenges — single column */
  .challenges-grid { grid-template-columns: 1fr; }
  .challenge-card { padding: var(--space-6); }

  /* Features — single column on mobile */
  .features-grid { grid-template-columns: 1fr; }

  /* Panel comparison */
  .panel-comparison-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .panel-col-label { font-size: var(--text-lg); }

  /* Metrics */
  .comparison-metrics { grid-template-columns: repeat(2, 1fr); }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; text-align: center; }
  .contact-brand { align-items: center; }
  .contact-detail { justify-content: center; }

  /* Footer */
  .footer-inner { flex-direction: column; text-align: center; }

  /* Section padding tighter on mobile */
  .section { padding-block: clamp(var(--space-8), 5vw, var(--space-12)); }
  .section-header { margin-bottom: var(--space-8); }
  h2 { font-size: clamp(1.8rem, 7vw, 2.8rem); }
  /* Challenges grid gap tighter */
  .challenges-grid { gap: var(--space-4); }
  .features-grid { gap: var(--space-4); }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .comparison-metrics { grid-template-columns: 1fr; }
  .hero-cta-group { flex-direction: column; }
  .btn { text-align: center; width: 100%; }
  .btn-lg { padding: var(--space-4) var(--space-8); }
  .panel-col-label { font-size: var(--text-base); }
  .contact-brand-tag { font-size: var(--text-lg); }
}