/* ==========================================================================
   AI Lead Qualification & Routing System — Design System & Styles
   ========================================================================== */

:root {
  /* Core Color Palette Tokens */
  --bg: #0e1b22;
  --surface: #13232c;
  --surface-2: #182f3a;
  --surface-hover: #1e3846;
  --border: #203947;
  --border-subtle: #172c37;
  --border-focus: #5ddcff;
  
  --text: #e8f1f5;
  --text-dim: #c5d7e0;
  --muted: #7f98a3;
  --muted-dark: #4d6672;
  --accent: #5ddcff;
  --accent-soft: rgba(93, 220, 255, 0.12);
  --accent-glow: rgba(93, 220, 255, 0.06);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout & Spacing */
  --container-max-width: 1100px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Links & Interactive */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

/* Mono Eyebrow */
.mono-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-block;
}

/* ==========================================================================
   SECTION 1: HEADER
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(14, 27, 34, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-normal), background-color var(--transition-normal);
}

.site-header.scrolled {
  border-bottom-color: var(--border);
  background-color: rgba(14, 27, 34, 0.95);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand-link {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  padding: 0.25rem 0;
}

.brand-link:hover {
  color: var(--accent);
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.8125rem;
  color: var(--muted);
  font-weight: 400;
}

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

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

.menu-toggle {
  display: none;
}

.mobile-nav-action {
  display: none;
}

.back-link {
  font-size: 0.8125rem;
  color: var(--muted);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.back-link:hover {
  color: var(--text);
  background-color: var(--surface);
  border-color: var(--border);
}

/* ==========================================================================
   SECTION 2: HERO
   ========================================================================== */

.hero-section {
  padding-top: 5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 1.25rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.2rem 0.55rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

.status-text {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  font-weight: 500;
}

.hero-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.title-accent {
  color: var(--text);
}

.hero-description {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  margin-bottom: 2.25rem;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--surface);
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.cta-button .arrow {
  color: var(--accent);
  transition: transform var(--transition-fast);
}

.cta-button:hover {
  background-color: var(--surface-2);
  border-color: var(--accent);
  color: var(--text);
}

.cta-button:hover .arrow {
  transform: translateX(3px);
}

.cta-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tech-stack-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.tech-stack-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-dark);
}

.tech-stack-items {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* Hero Visual: Workflow Card */
.hero-visual-wrapper {
  display: flex;
  justify-content: center;
}

.workflow-card {
  width: 100%;
  max-width: 380px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.workflow-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 0.875rem;
  border-bottom: 1px solid var(--border-subtle);
}

.terminal-dots {
  display: flex;
  gap: 0.35rem;
}

.terminal-dots .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--border);
}

.diagram-tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.workflow-diagram {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.diagram-node {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.625rem 0.85rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.diagram-node:hover {
  background-color: var(--surface-2);
  border-color: var(--border-focus);
}

.node-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--muted-dark);
  background-color: var(--surface);
  padding: 0.15rem 0.35rem;
  border-radius: var(--radius-sm);
  line-height: 1;
  margin-top: 0.15rem;
}

.diagram-node:hover .node-badge {
  color: var(--accent);
}

.node-info {
  display: flex;
  flex-direction: column;
}

.node-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
  line-height: 1.2;
}

.node-desc {
  font-size: 0.6875rem;
  color: var(--muted);
  margin-top: 0.15rem;
  line-height: 1.3;
}

/* Highlighted node for Qualify step */
.diagram-node.node-highlight {
  border-color: rgba(93, 220, 255, 0.4);
  background-color: rgba(93, 220, 255, 0.03);
}

.diagram-node.node-highlight .node-title {
  color: var(--accent);
}

.diagram-node.node-highlight .node-badge {
  color: var(--accent);
  background-color: var(--accent-soft);
}

.diagram-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 22px;
  justify-content: center;
  position: relative;
}

.connector-line {
  width: 1px;
  height: 100%;
  background-color: var(--border);
}

.connector-arrow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1;
  color: var(--muted-dark);
  background-color: var(--surface);
  padding: 0 0.15rem;
}

/* ==========================================================================
   SECTION 3: THE PROBLEM
   ========================================================================== */

.problem-section {
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
}

.problem-header {
  margin-bottom: 2rem;
}

.problem-header .mono-eyebrow {
  margin-bottom: 0.75rem;
}

.problem-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}

.problem-narrative {
  max-width: 680px;
  margin-bottom: 3.5rem;
}

.problem-narrative .lead-in {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.problem-narrative p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.problem-narrative .problem-highlight {
  color: var(--text-dim);
  font-weight: 500;
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
  margin-top: 1.25rem;
}

/* Problem Chain Sequence */
.problem-chain-wrapper {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 3rem;
}

.chain-intro-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-dark);
  margin-bottom: 1.5rem;
}

.decision-chain {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}

.chain-step {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.85rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.chain-step:hover {
  border-color: var(--accent);
  background-color: var(--surface-2);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--muted);
  font-weight: 500;
}

.step-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}

.chain-arrow {
  color: var(--muted-dark);
  font-size: 0.875rem;
  user-select: none;
}

.chain-caption {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.5;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

/* Conclusion */
.problem-conclusion {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  max-width: 680px;
}

.conclusion-line {
  width: 32px;
  height: 2px;
  background-color: var(--accent);
  flex-shrink: 0;
}

.conclusion-text {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.5;
}

/* ==========================================================================
   SECTION 4: SYSTEM OVERVIEW (ARCHITECTURE)
   ========================================================================== */

.system-section {
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-header .mono-eyebrow {
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.85rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--muted);
  max-width: 680px;
  line-height: 1.6;
}

.system-arch-wrapper {
  margin-top: 2rem;
}

.arch-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
}

.arch-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-subtle);
}

.arch-card-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text);
}

.arch-status-pill {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(93, 220, 255, 0.25);
}

.arch-tree {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.arch-trunk {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 380px;
}

.arch-node {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  transition: all var(--transition-fast);
}

.arch-node:hover {
  border-color: var(--accent);
  background-color: var(--surface-2);
}

.arch-node-tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
  background-color: var(--surface);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.arch-node-content {
  display: flex;
  flex-direction: column;
}

.arch-node-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
}

.arch-node-meta {
  font-size: 0.6875rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.arch-node.highlight-ai {
  border-color: rgba(93, 220, 255, 0.45);
  background-color: rgba(93, 220, 255, 0.04);
}

.arch-node.highlight-ai .arch-node-title {
  color: var(--accent);
}

.arch-node.highlight-ai .tag-ai {
  color: var(--accent);
  background-color: var(--accent-soft);
  border: 1px solid rgba(93, 220, 255, 0.3);
}

.arch-node.node-muted {
  opacity: 0.85;
}

.arch-flow-connector {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--muted-dark);
  margin: 0.35rem 0;
  user-select: none;
}

/* Decision Nodes */
.arch-decision-node {
  background-color: var(--surface-2);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-sm);
  padding: 0.45rem 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px rgba(93, 220, 255, 0.08);
}

.arch-decision-node .decision-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.arch-decision-node.decision-sm {
  padding: 0.35rem 1rem;
  margin-bottom: 1.25rem;
}

/* Branches Container */
.arch-branches {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  width: 100%;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--border);
  position: relative;
}

.branch-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: rgba(14, 27, 34, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.branch-pill-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.branch-pill-tag.tag-pass {
  color: var(--accent);
  background-color: var(--accent-soft);
  border: 1px solid rgba(93, 220, 255, 0.25);
}

.branch-pill-tag.tag-fail {
  color: var(--muted);
  background-color: var(--surface);
  border: 1px solid var(--border);
}

.sub-outcomes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  width: 100%;
  margin-top: 0.5rem;
}

.outcome-box {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.outcome-box:hover {
  border-color: var(--accent);
}

.outcome-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}

.outcome-cond {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--muted);
  font-weight: 600;
}

.outcome-badge {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  padding: 0.1rem 0.3rem;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.outcome-sales .outcome-badge {
  color: var(--accent);
  background-color: var(--accent-soft);
}

.outcome-low .outcome-badge {
  color: var(--muted);
  background-color: var(--surface);
}

.outcome-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
}

.outcome-desc {
  font-size: 0.6875rem;
  color: var(--muted);
  margin-top: 0.2rem;
  line-height: 1.3;
}

.arch-caption {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
  margin-top: 1.25rem;
  text-align: center;
}

/* ==========================================================================
   SECTIONS 5 & 6: INTERACTIVE DEMO & RESULTS
   ========================================================================== */

.demo-section {
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.demo-card-container {
  max-width: 680px;
  margin: 0 auto;
}

.demo-box {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.45rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.form-label .required {
  color: var(--accent);
}

.optional-label {
  font-size: 0.75rem;
  color: var(--muted-dark);
  font-weight: 400;
}

.form-input,
.form-textarea {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text);
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--muted-dark);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.field-error {
  font-size: 0.75rem;
  color: #ff7b7b;
  margin-top: 0.25rem;
  min-height: 1rem;
}

.form-footer {
  margin-top: 0.5rem;
  display: flex;
  justify-content: flex-start;
}

.submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--surface-2);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.7rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.submit-btn:hover {
  background-color: var(--surface-hover);
  border-color: var(--accent);
  color: var(--text);
}

.submit-btn:hover .arrow {
  transform: translateX(3px);
}

.submit-btn .arrow {
  color: var(--accent);
  transition: transform var(--transition-fast);
}

.demo-disclaimer {
  font-size: 0.75rem;
  color: var(--muted-dark);
  line-height: 1.5;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

/* Submitting State */
.demo-processing {
  text-align: center;
  padding: 3.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.processing-spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1.25rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.processing-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.processing-pipeline {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.pipe-step {
  color: var(--muted-dark);
}

.pipe-step.active {
  color: var(--accent);
  font-weight: 600;
}

.pipe-arrow {
  color: var(--border);
  font-size: 0.75rem;
}

/* Result State */
.demo-result-card {
  display: flex;
  flex-direction: column;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.result-status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.result-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.result-status-text {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
}

.result-timestamp {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.result-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.metric-item {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.65rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}

.metric-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

.metric-value.badge-pass {
  color: var(--accent);
}

.metric-value.badge-fail {
  color: #ff7b7b;
}

.result-dot.error-dot {
  background-color: #ff7b7b;
  box-shadow: 0 0 8px #ff7b7b;
}

.result-dot.fallback-dot {
  background-color: #f59e0b;
  box-shadow: 0 0 8px rgba(245, 158, 11, 0.4);
}

.metric-value.badge-action {
  color: #5ddcff;
}

.fallback-saved-tag {
  color: var(--accent);
  font-weight: 500;
  margin-top: 0.5rem;
}

.fallback-cta-box {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: 0.5rem;
}

.fallback-cta-label {
  font-size: 0.8125rem;
  color: var(--text);
  font-weight: 500;
}

.fallback-whatsapp-btn {
  align-self: flex-start;
  text-decoration: none;
}

.result-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.detail-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.detail-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted-dark);
}

.detail-content {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.detail-content.detail-action {
  color: var(--text);
  font-weight: 500;
}

.result-footer {
  display: flex;
  justify-content: flex-start;
}

.reset-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.reset-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background-color: var(--surface-2);
}

/* ==========================================================================
   SECTION 6: HOW THE SYSTEM WORKS & DESIGN SPLIT
   ========================================================================== */

.how-it-works-section {
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.step-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.step-card:hover {
  border-color: var(--accent);
  background-color: var(--surface-2);
}

.step-card-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--muted-dark);
  margin-bottom: 0.75rem;
}

.step-card:hover .step-card-num {
  color: var(--accent);
}

.step-card-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.step-card-desc {
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.5;
}

.step-card.step-card-ai {
  border-color: rgba(93, 220, 255, 0.35);
  background-color: rgba(93, 220, 255, 0.02);
}

.step-card.step-card-ai .step-card-title {
  color: var(--accent);
}

.step-card.step-card-ai .step-card-num {
  color: var(--accent);
}

/* Integrated Design Split Block (Why this split) */
.design-split-block {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
}

.split-header .mono-eyebrow {
  margin-bottom: 0.5rem;
}

.split-title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text);
  letter-spacing: -0.015em;
  margin-bottom: 1rem;
}

.split-narrative {
  max-width: 720px;
  margin-bottom: 1.75rem;
}

.split-narrative p {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 0.65rem;
}

.split-narrative p:last-child {
  margin-bottom: 0;
}

.split-decisions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.decision-pill {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  transition: all var(--transition-fast);
}

.decision-pill:hover {
  border-color: var(--accent);
  background-color: var(--surface-2);
}

.decision-pill-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: 0.15rem 0.35rem;
  border-radius: var(--radius-sm);
  line-height: 1;
}

.decision-pill-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
}

/* ==========================================================================
   SECTION 7: IMPLEMENTATION
   ========================================================================== */

.implementation-section {
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.workflow-canvas-container {
  margin-top: 2rem;
}

.workflow-canvas-frame {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
}

.canvas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background-color: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.canvas-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.canvas-image-wrapper {
  min-height: 280px;
  background-color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.workflow-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Technical Screenshot Placeholder */
.canvas-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3.5rem 1.5rem;
  text-align: center;
  width: 100%;
}

.placeholder-icon {
  color: var(--muted-dark);
  margin-bottom: 0.75rem;
}

.placeholder-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}

.placeholder-path {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted-dark);
  background-color: var(--surface);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.canvas-stack-row {
  margin-top: 1.5rem;
}

.canvas-caption {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
  margin-top: 1rem;
}

/* ==========================================================================
   SECTION 8: CASE STUDY
   ========================================================================== */

.case-study-section {
  padding-top: 5.5rem;
  padding-bottom: 6rem;
}

.case-study-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.case-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.case-card:hover {
  border-color: var(--accent);
}

.case-card-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.case-card-text {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.65;
}

/* Testing Matrix Card */
.testing-matrix-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.testing-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.testing-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.testing-subtitle {
  font-size: 0.875rem;
  color: var(--text);
  font-weight: 500;
}

.testing-grid {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.test-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 1rem;
  transition: all var(--transition-fast);
}

.test-row:hover {
  border-color: var(--border-focus);
  background-color: var(--surface-2);
}

.test-condition {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text);
  font-weight: 500;
}

.test-arrow {
  color: var(--muted-dark);
  font-size: 0.875rem;
  margin: 0 0.5rem;
  user-select: none;
}

.test-outcome {
  font-size: 0.8125rem;
  color: var(--text-dim);
  font-weight: 500;
}

.test-outcome.outcome-highlight {
  color: var(--accent);
}

.test-outcome.outcome-muted {
  color: var(--muted);
}

.test-outcome.outcome-rejected {
  color: #ff9e9e;
}

/* Current Limitation */
.limitation-block {
  background-color: rgba(14, 27, 34, 0.6);
  border-left: 2px solid var(--muted-dark);
  padding: 0.85rem 1.25rem;
  margin-bottom: 2rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.limitation-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  display: block;
  margin-bottom: 0.35rem;
}

.limitation-text {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
}

/* Possible Extensions */
.extensions-row {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.extensions-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted-dark);
  line-height: 1.5;
  letter-spacing: 0.02em;
}

/* ==========================================================================
   SECTION 9: FOOTER
   ========================================================================== */

.site-footer {
  background-color: rgba(14, 27, 34, 0.95);
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 0;
}

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

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer-brand {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.footer-subtext {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--muted-dark);
  letter-spacing: 0.04em;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
}

.footer-project {
  font-size: 0.8125rem;
  color: var(--muted);
}

.footer-back-link {
  font-size: 0.75rem;
  color: var(--muted-dark);
  transition: color var(--transition-fast);
}

.footer-back-link:hover {
  color: var(--accent);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual-wrapper {
    justify-content: flex-start;
  }

  .workflow-card {
    max-width: 440px;
  }

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

  .split-decisions-grid {
    grid-template-columns: 1fr;
  }

  .arch-branches {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .case-study-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .header-container {
    height: 50px;
  }

  .nav-list {
    gap: 1rem;
  }

  .hero-section {
    padding-top: 3.5rem;
    padding-bottom: 4rem;
  }

  .meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .problem-section,
  .system-section,
  .demo-section,
  .how-it-works-section,
  .implementation-section,
  .case-study-section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .problem-chain-wrapper,
  .arch-card,
  .demo-box,
  .design-split-block,
  .testing-matrix-card {
    padding: 1.25rem;
  }

  .decision-chain {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4rem;
  }

  .chain-step {
    justify-content: flex-start;
  }

  .chain-arrow {
    display: none;
  }

  .tech-stack-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .result-metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }

  .sub-outcomes-grid {
    grid-template-columns: 1fr;
  }

  .test-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .test-arrow {
    display: none;
  }

  .footer-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .footer-right {
    align-items: flex-start;
  }
}

/* Intentional mobile and tablet layouts */
@media (max-width: 960px) {
  .header-container {
    position: relative;
  }

  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    padding: 8px;
    color: var(--text);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
  }

  .menu-toggle:hover,
  .menu-toggle:focus-visible {
    border-color: var(--border);
    background-color: var(--surface);
  }

  .menu-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }

  .menu-toggle-line {
    width: 100%;
    height: 1px;
    background-color: currentColor;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1.5rem;
    left: 1.5rem;
    display: none;
    padding: 0.75rem;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
  }

  .nav-menu.is-open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-item + .nav-item {
    border-top: 1px solid var(--border-subtle);
  }

  .nav-link {
    display: block;
    padding: 0.75rem 0.5rem;
    font-size: 0.875rem;
  }

  .header-action {
    display: none;
  }

  .mobile-nav-action {
    display: block;
  }

  .hero-title {
    font-size: clamp(1.8rem, 8vw, 2.35rem);
  }

  .arch-card-header {
    align-items: flex-start;
    gap: 0.75rem;
    flex-wrap: wrap;
  }

  .arch-status-pill {
    white-space: normal;
  }

  .arch-branches {
    align-items: stretch;
  }

  .branch-col {
    min-width: 0;
  }

  .arch-node-content,
  .arch-node-title,
  .arch-node-meta,
  .outcome-title,
  .outcome-desc {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .workflow-image {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    object-fit: contain;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .nav-menu {
    right: 1rem;
    left: 1rem;
  }

  .hero-grid {
    gap: 2.25rem;
  }

  .hero-section {
    padding-top: 2.75rem;
    padding-bottom: 3.25rem;
  }

  .hero-title {
    line-height: 1.12;
    margin-bottom: 1rem;
  }

  .hero-description {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }

  .hero-actions {
    margin-bottom: 1.75rem;
  }

  .cta-button,
  .submit-btn {
    min-height: 44px;
  }

  .workflow-card {
    padding: 1rem;
  }

  .diagram-tag,
  .arch-card-title,
  .arch-status-pill {
    font-size: 0.5625rem;
  }

  .problem-chain-wrapper,
  .arch-card,
  .demo-box,
  .design-split-block,
  .testing-matrix-card {
    padding: 1rem;
  }

  .decision-chain {
    gap: 0.35rem;
  }

  .chain-step {
    padding: 0.6rem 0.7rem;
  }

  .arch-branches {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
  }

  .branch-col {
    padding: 1rem;
  }

  .sub-outcomes-grid,
  .result-metrics-grid {
    grid-template-columns: 1fr;
  }

  .demo-processing {
    padding: 3rem 1rem;
  }

  .processing-pipeline {
    gap: 0.35rem;
    padding-left: 0.55rem;
    padding-right: 0.55rem;
    font-size: 0.6875rem;
  }

  .result-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }

  .result-timestamp {
    overflow-wrap: anywhere;
  }

  .result-details {
    padding: 1rem;
  }

  .fallback-whatsapp-btn {
    align-self: stretch;
    justify-content: center;
  }

  .test-row {
    padding: 0.65rem 0.75rem;
  }

  .test-condition,
  .test-outcome {
    overflow-wrap: anywhere;
  }

  .canvas-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }

  .footer-project,
  .extensions-text {
    overflow-wrap: anywhere;
  }
}