/* ==========================================================================
   TELDAR AI — Design System & Shared Stylesheet
   Swiss Sovereign Enterprise Artificial Intelligence
   Design System: Restrained Swiss Minimalist, Warm Ivory, Pastel Orange
   ========================================================================== */

:root {
  /* Sophisticated Warm & Pastel Orange Palette */
  --bg-primary: #FFF9F4;           /* Warm ivory / off-white */
  --bg-secondary: #F7EEE7;         /* Warm clay-tinted alternate section */
  --bg-tertiary: #F2E5DC;          /* Subtle grouping background */
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-hover: rgba(255, 255, 255, 0.94);
  
  --color-orange-pastel: #F3BE9C;  /* Very light sophisticated pastel orange */
  --color-orange-pale: #FBE4D5;    /* Soft peach / ivory accent */
  --color-orange-subtle: #FDF3EB;  /* Extremely pale wash */
  --color-orange-deep: #D48858;    /* Muted architectural rust/orange for interactive focus */
  
  --color-sand: #E9D8CA;           /* Light sand divider */
  --color-border: #E8D9CD;         /* Structural architectural hairline */
  --color-border-dark: #CBB9AA;    /* Stronger structural line */
  
  --text-primary: #40362F;         /* Dark chocolate brown for important typography */
  --text-secondary: #796C63;       /* Balanced taupe for body & explanations */
  --text-muted: #9D8F86;           /* Muted taupe for captions, labels, metadata */
  --text-inverted: #FFF9F4;        /* Off-white on dark badges/buttons */
  
  --accent-swiss-red: #D94638;     /* Controlled Swiss mark accent if needed sparingly */
  
  /* System Typography Stack */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* Spatial System */
  --max-width: 1200px;
  --max-width-narrow: 840px;
  --max-width-wide: 1320px;
  --nav-height: 80px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  
  /* Transitions */
  --transition-fast: 160ms cubic-bezier(0.23, 1, 0.32, 1);
  --transition-smooth: 240ms cubic-bezier(0.23, 1, 0.32, 1);
}

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

html {
  font-size: 16px;
  line-height: 1.5;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

button {
  font-family: inherit;
}

/* Typography Standards */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.025em;
  line-height: 1.15;
}

p {
  color: var(--text-secondary);
  line-height: 1.68;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 500;
}

.subheading {
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 680px;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

.container-wide {
  width: 100%;
  max-width: var(--max-width-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

.section {
  padding-top: 6.5rem;
  padding-bottom: 6.5rem;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.section-alt {
  background-color: var(--bg-secondary);
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-orange-deep);
  margin-bottom: 1rem;
}

.section-eyebrow::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-orange-deep);
  border-radius: 50%;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 2.75rem);
  font-weight: 500;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 660px;
}

/* Header & Global Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 249, 244, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
}

.site-header .container-wide {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 24px;
  height: 24px;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  background: var(--bg-secondary);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.35rem 0;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-orange-deep);
}

.header-action {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Buttons & Interactive Elements */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.35rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border: 1px solid var(--text-primary);
}

.btn-primary:hover {
  background-color: #27211C;
  border-color: #27211C;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-orange-pale);
  border-color: var(--color-border-dark);
  transform: translateY(-1px);
}

.btn-subtle {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  padding: 0.65rem 1rem;
}

.btn-subtle:hover {
  color: var(--text-primary);
  border-color: var(--color-border);
  background-color: var(--bg-secondary);
}

/* Hero Component */
.hero {
  padding-top: 5rem;
  padding-bottom: 6rem;
  border-bottom: 1px solid var(--color-border);
  background: radial-gradient(circle at 85% 20%, rgba(243, 190, 156, 0.22) 0%, rgba(255, 249, 244, 0) 65%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background-color: var(--color-orange-pale);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.hero-title {
  font-size: clamp(2.75rem, 5.2vw, 4.25rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
}

.hero-lead {
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-credentials {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--color-border);
}

.credential-item {
  display: flex;
  flex-direction: column;
}

.credential-value {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.credential-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Architecture Visual Box */
.visual-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: 0 4px 30px rgba(64, 54, 47, 0.03);
  position: relative;
}

.visual-caption {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Four Experts Grid */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.expert-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.expert-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--color-orange-pastel);
  transform: translateY(-2px);
}

.expert-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-orange-deep);
  margin-bottom: 0.75rem;
  letter-spacing: 0.08em;
}

.expert-title {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.expert-desc {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--text-secondary);
  flex-grow: 1;
}

.expert-stat {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Split Architectural Feature Sections */
.architecture-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4.5rem;
  align-items: center;
}

.feature-points {
  margin-top: 2rem;
  display: grid;
  gap: 1.25rem;
}

.feature-point {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.point-number {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-orange-deep);
  background-color: var(--color-orange-pale);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  line-height: 1;
  margin-top: 0.2rem;
}

.point-content h4 {
  font-size: 1.0625rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.point-content p {
  font-size: 0.9375rem;
  line-height: 1.55;
}

/* Statistics Callout */
.stat-highlight-band {
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 3.5rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.stat-number-giant {
  font-size: clamp(3.25rem, 6vw, 5.25rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.stat-lead {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.pipeline-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.pipeline-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.65rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

/* Sovereign Principles Grid */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.principle-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2.25rem;
}

.principle-icon {
  margin-bottom: 1.25rem;
  color: var(--color-orange-deep);
}

.principle-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

/* Technical Specification Table */
.spec-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.spec-table th,
.spec-table td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table th {
  background-color: var(--bg-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 500;
  width: 38%;
}

.spec-table td {
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.spec-table td.code-val {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.spec-table tr:hover td {
  background-color: rgba(251, 228, 213, 0.25);
}

/* Callout Box / Note */
.callout-box {
  padding: 1.5rem 1.75rem;
  border-left: 3px solid var(--color-orange-pastel);
  background-color: var(--bg-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.75rem 0;
}

.callout-box p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.callout-box strong {
  color: var(--text-primary);
}

/* CTA Footer Block */
.cta-block {
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 4.5rem 3.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
}

.cta-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2rem;
}

/* Site Footer */
.site-footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--color-border);
  padding-top: 4rem;
  padding-bottom: 3.5rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border);
}

.footer-brand {
  max-width: 360px;
}

.footer-brand h4 {
  font-size: 1.125rem;
  margin-bottom: 0.4rem;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.footer-nav {
  display: flex;
  gap: 3.5rem;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-weight: 500;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Contact Page Cards */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: start;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2.75rem;
}

.contact-item {
  margin-bottom: 2rem;
}

.contact-item:last-child {
  margin-bottom: 0;
}

.contact-item-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.contact-item-val {
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-item-val a {
  color: var(--text-primary);
  border-bottom: 1px solid var(--color-border-dark);
}

.contact-item-val a:hover {
  color: var(--color-orange-deep);
  border-color: var(--color-orange-deep);
}

.contact-address {
  font-style: normal;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* SVG Diagram Styling */
.diag-line {
  stroke: var(--color-border-dark);
  stroke-width: 1.5;
  fill: none;
}

.diag-line-active {
  stroke: var(--color-orange-deep);
  stroke-width: 2;
  fill: none;
}

.diag-box {
  fill: var(--bg-primary);
  stroke: var(--color-border-dark);
  stroke-width: 1.5;
}

.diag-box-active {
  fill: var(--color-orange-pale);
  stroke: var(--color-orange-deep);
  stroke-width: 1.5;
}

.diag-text-title {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  fill: var(--text-primary);
}

.diag-text-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--text-muted);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .experts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .architecture-feature {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .stat-highlight-band {
    grid-template-columns: 1fr;
    padding: 2.5rem;
    gap: 2rem;
  }
  
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 70px;
  }
  
  .section {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }
  
  .container,
  .container-wide,
  .container-narrow {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
  
  .site-header .container-wide {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }
  
  .site-header .brand-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
  }
  
  .site-nav {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    border-top: 1px solid var(--color-border);
    padding-top: 0.5rem;
    width: 100%;
  }
  
  .nav-link {
    font-size: 0.8125rem;
    padding: 0.2rem 0;
  }
  
  .header-action {
    display: none;
  }
  
  .hero {
    padding-top: 3.5rem;
    padding-bottom: 4rem;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .hero-credentials {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .experts-grid {
    grid-template-columns: 1fr;
  }
  
  .principles-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    flex-direction: column;
    gap: 2.5rem;
  }
  
  .footer-nav {
    flex-wrap: wrap;
    gap: 2rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .cta-block {
    padding: 3rem 1.5rem;
  }
}