/* ================================================================
   Jachat (pan.jachat.com) - Braun Bauhaus Edition
   Dieter Rams Functionalism & Tactile Neural Stream
   ================================================================ */

:root {
  --canvas: #ffffff;
  --canvas-subtle: #f3f4f6;
  --canvas-well: #e5e7eb;
  
  --border: #d1d5db;
  --border-strong: #9ca3af;
  --border-focus: #111827;
  
  --ink: #111827;
  --ink-secondary: #374151;
  --ink-muted: #4b5563;
  
  --braun-orange: #c2410c;
  --braun-orange-subtle: #fff7ed;
  --braun-orange-border: #fed7aa;
  
  --bauhaus-blue: #1d4ed8;
  --bauhaus-blue-subtle: #eff6ff;
  
  --status-green: #15803d;
  --status-green-subtle: #f0fdf4;
  --status-green-border: #bbf7d0;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
  
  --font-sans: 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'DM Mono', ui-monospace, Menlo, monospace;
  
  --radius-xs: 0px;
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-pill: 9999px;
  
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--canvas);
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background-color: var(--canvas);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.site-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ================= Header ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--ink);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand-group {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink);
  text-decoration: none;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-secondary);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.nav-link:hover {
  color: var(--braun-orange);
}

.header-action .btn-switch-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--ink);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-xs);
  text-decoration: none;
  transition: background-color 0.2s var(--ease);
}

.header-action .btn-switch-cta:hover {
  background-color: var(--braun-orange);
}

/* ================= Hero Section ================= */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  border-bottom: 1px solid var(--border);
}

.hero-meta-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}

.hero-dot-active {
  width: 8px;
  height: 8px;
  background-color: var(--braun-orange);
  border-radius: 50%;
  display: inline-block;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 0.75rem;
  max-width: 900px;
}

.hero-slogan {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 0.6rem;
  line-height: 1.35;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--ink-secondary);
  max-width: 840px;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background-color: var(--braun-orange);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-xs);
  text-decoration: none;
  transition: background-color 0.2s var(--ease);
}

.btn-primary:hover {
  background-color: #9a3412;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background-color: var(--canvas-subtle);
  color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xs);
  text-decoration: none;
  transition: all 0.2s var(--ease);
}

.btn-secondary:hover {
  border-color: var(--ink);
  background-color: var(--canvas-well);
}

/* Hero Mechanical Console / 4 Pillars */
.console-box {
  background-color: var(--canvas-subtle);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 2rem;
}

.console-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.console-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.console-metric-item {
  background-color: #ffffff;
  border: 1px solid var(--border);
  padding: 1.25rem;
  border-radius: var(--radius-xs);
}

.metric-num {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 0.4rem;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--braun-orange);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.metric-desc {
  font-size: 0.85rem;
  color: var(--ink-secondary);
  line-height: 1.45;
}

/* ================= Section Common ================= */
.section-block {
  padding: 4.5rem 0;
  border-bottom: 1px solid var(--border);
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--braun-orange);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-heading {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.section-summary {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  max-width: 820px;
  margin-bottom: 3rem;
}

/* ================= 4 Buffs Grid ================= */
.buffs-bauhaus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.buff-bauhaus-card {
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.buff-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--braun-orange);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
}

.buff-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.buff-card-text {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.buff-foot {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--status-green);
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

/* ================= Prototype Evaluation ================= */
.prototype-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.device-showcase-box {
  background-color: var(--canvas-subtle);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 2rem;
}

.device-photo-frame {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  overflow: hidden;
  background-color: #ffffff;
  margin-bottom: 1.25rem;
}

.device-photo-frame img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}

/* Prototype Package Box */
.device-package-box {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #ffffff;
  border: 1px solid var(--border);
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
  text-align: center;
}

.device-details-panel {
  display: flex;
  flex-direction: column;
}

.price-strip {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.price-val {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--braun-orange);
}

.price-unit {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.stock-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-strong);
  padding: 0.25rem 0.6rem;
  color: var(--ink);
}

.product-headline {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
  margin-bottom: 1.5rem;
}

.step-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--braun-orange);
  flex-shrink: 0;
}

.step-desc {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

.step-desc strong {
  color: var(--ink);
}

.sample-note {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-muted);
  text-align: center;
  margin-top: 0.75rem;
}

/* ================= Architecture Comparison Section ================= */
.comparison-bauhaus-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.comparison-bauhaus-card {
  background-color: var(--canvas-subtle);
  border: 2px solid var(--border-strong);
  padding: 2.25rem;
}

.comparison-bauhaus-card.featured {
  border-color: var(--ink);
  background-color: #ffffff;
}

.compare-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.75rem;
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.compare-item {
  display: flex;
  gap: 0.85rem;
  align-items: baseline;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

.compare-item strong {
  color: var(--ink);
}

.bullet-cross {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
  color: #dc2626;
  flex-shrink: 0;
}

.bullet-check {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
  color: var(--status-green);
  flex-shrink: 0;
}

/* ================= Cloud Platform ================= */
.cloud-pipeline-trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.pipeline-bauhaus-cell {
  background-color: var(--canvas-subtle);
  border: 2px solid var(--ink);
  padding: 2rem;
}

.layer-chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--braun-orange);
  margin-bottom: 0.5rem;
}

.layer-heading {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.layer-body {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

.features-bauhaus-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-bauhaus-item {
  border-left: 2px solid var(--ink);
  padding-left: 1.25rem;
}

.feature-item-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.6rem;
}

.feature-item-text {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  line-height: 1.65;
}

/* ================= Quick Porting / Code ================= */
.porting-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 2rem;
  align-items: stretch;
}

.code-bauhaus-box {
  background-color: var(--canvas-subtle);
  border: 2px solid var(--ink);
  border-radius: var(--radius-xs);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.code-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background-color: var(--canvas-well);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.code-body-block {
  padding: 1.5rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.72;
  color: var(--ink);
  background-color: #ffffff;
  overflow-x: auto;
  flex: 1;
}

.c-dim { color: #64748b; font-style: italic; }
.c-kw { color: #1d4ed8; font-weight: 700; }
.c-fn { color: #111827; font-weight: 700; }
.c-val { color: #15803d; }

.deliverables-bauhaus-card {
  background-color: var(--canvas-subtle);
  border: 2px solid var(--ink);
  border-radius: var(--radius-xs);
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.deliverables-header-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.75rem;
}

.deliv-entry {
  margin-bottom: 1.25rem;
}

.deliv-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--braun-orange);
  margin-bottom: 0.25rem;
}

.deliv-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.35rem;
}

.deliv-info {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

.btn-full {
  width: 100%;
  display: block;
  text-align: center;
}

.email-note {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-muted);
  text-align: center;
  margin-top: 0.8rem;
}

.email-note a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: underline;
}

/* ================= Footer ================= */
.site-footer {
  padding: 3.5rem 0;
  border-top: 2px solid var(--ink);
  text-align: center;
}

.footer-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.footer-brand {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--ink);
  letter-spacing: -0.03em;
}

.footer-tagline {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.footer-specs {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin-top: 0.25rem;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .console-grid, .buffs-bauhaus-grid, .prototype-split, .comparison-bauhaus-grid, .cloud-pipeline-trio, .features-bauhaus-row, .porting-layout {
    grid-template-columns: 1fr;
  }
  .site-nav {
    display: none;
  }
}