/* Design System: InfrionShield AI (TechInfrion) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;600&family=Space+Grotesk:wght@600;700&display=swap');

:root {
  /* Folk.app Color Palette */
  --canvas-white: #FFFFFF;
  --core-black: #000000;
  --ink-border: #1F1E1C;
  --action-blue: #5079E4;
  --signal-pink: #DA5992;
  --soft-blue: #E3F0FF;
  
  /* Additional UI tints */
  --light-gray: #F9F9F8;
  --dark-gray: #5A5958;
  --success-green: #37B24D;
  --danger-red: #F03E3E;
  --warning-amber: #F59F00;

  /* Typography */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing system (4px grid base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--canvas-white);
  color: var(--core-black);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography elements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  color: var(--core-black);
}

h1 {
  font-size: 3.5rem; /* ~56px */
  letter-spacing: -0.03em;
}

h2 {
  font-size: 2.5rem; /* ~40px */
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

h3 {
  font-size: 1.75rem; /* ~28px */
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

p {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  color: var(--dark-gray);
  margin-bottom: var(--space-4);
}

p.lead {
  font-size: 1.2rem;
  color: var(--core-black);
}

a {
  color: var(--signal-pink);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease-in-out;
}

a:hover {
  text-decoration: underline;
}

/* Mono block text tags */
code, pre, .clause-ref {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background-color: var(--light-gray);
  padding: 2px 6px;
  border: 1px solid var(--ink-border);
  border-radius: 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: 9999px; /* Pill CTAs */
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--core-black);
  color: var(--canvas-white);
  border: 1px solid var(--core-black);
}

.btn-primary:hover {
  background-color: #333333;
  border-color: #333333;
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--core-black);
  border: 1px solid var(--ink-border);
  border-radius: 0px; /* Square corners */
}

.btn-secondary:hover {
  background-color: var(--light-gray);
  text-decoration: none;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

/* Cards style (Flat, 12px radius, Ink Border, no shadows) */
.card {
  background-color: var(--canvas-white);
  border: 1px solid var(--ink-border);
  border-radius: 12px;
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
}

.card-soft-blue {
  background-color: var(--soft-blue);
  border: 1px solid var(--ink-border);
}

/* Navbar */
.navbar {
  height: var(--header-height);
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  background-color: var(--canvas-white);
  border-bottom: 1px solid var(--ink-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
  z-index: 1000;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--core-black);
  text-decoration: none;
}

.nav-brand span {
  color: var(--action-blue);
}

.nav-brand:hover {
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  color: var(--core-black);
  font-size: 15px;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--signal-pink);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--signal-pink);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Mobile Navbar controls */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
}

/* Main layouts */
.section {
  padding: var(--space-20) 0;
  border-bottom: 1px solid var(--ink-border);
  position: relative;
}

.section-light {
  background-color: var(--canvas-white);
}

.section-gray {
  background-color: var(--light-gray);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(-1 * var(--space-4));
}

.col {
  flex: 1;
  padding: 0 var(--space-4);
}

.col-12 { width: 100%; }
.col-6 { width: 50%; }
.col-4 { width: 33.333%; }
.col-3 { width: 25%; }

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }

/* Hero section */
.hero {
  padding: calc(var(--header-height) + var(--space-16)) 0 var(--space-20) 0;
  background-color: var(--canvas-white);
  border-bottom: 1px solid var(--ink-border);
}

.hero-text {
  max-width: 800px;
  margin-bottom: var(--space-8);
}

.hero h1 {
  font-size: 4rem;
  margin-bottom: var(--space-4);
}

.hero p {
  font-size: 1.3rem;
  color: var(--dark-gray);
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

/* Hero Screenshot / Mock Interface styling */
.mock-interface {
  border: 1px solid var(--ink-border);
  border-radius: 12px;
  background-color: var(--canvas-white);
  overflow: hidden;
  position: relative;
}

.mock-header {
  height: 48px;
  border-bottom: 1px solid var(--ink-border);
  background-color: var(--light-gray);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  justify-content: space-between;
}

.mock-window-dots {
  display: flex;
  gap: 6px;
}

.mock-dot {
  width: 10px;
  height: 10px;
  border: 1px solid var(--ink-border);
  border-radius: 50%;
}

.mock-dot.red { background-color: #ff5f56; }
.mock-dot.yellow { background-color: #ffbd2e; }
.mock-dot.green { background-color: #27c93f; }

.mock-address-bar {
  background-color: var(--canvas-white);
  border: 1px solid var(--ink-border);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 16px;
  border-radius: 4px;
  width: 50%;
  text-align: center;
  color: var(--dark-gray);
}

.mock-content {
  padding: var(--space-6);
  min-height: 350px;
}

/* Trust Blocks */
.trust-block {
  text-align: center;
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--ink-border);
  background-color: var(--canvas-white);
}

.trust-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--dark-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-6);
}

.trust-logos {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
  padding: 0 var(--space-4);
}

.trust-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--dark-gray);
  letter-spacing: -0.02em;
  opacity: 0.8;
}

.trust-rating {
  margin-top: var(--space-4);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--core-black);
}

.trust-stars {
  color: #FAB005;
  font-size: 18px;
  letter-spacing: 2px;
}

/* Forms (Square corners, Ink Border, no shadow) */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: var(--space-2);
  color: var(--core-black);
}

.form-control {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--ink-border);
  border-radius: 0px; /* Square corners */
  font-family: var(--font-body);
  font-size: 15px;
  background-color: var(--canvas-white);
  transition: border-color 0.15s ease-in-out;
}

.form-control:focus {
  outline: none;
  border-color: var(--action-blue);
  box-shadow: none;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231F1E1C' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 40px;
}

/* ROI Calculator Layout */
.roi-calculator-container {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-8);
  border: 1px solid var(--ink-border);
  border-radius: 12px;
  overflow: hidden;
  background-color: var(--canvas-white);
}

.roi-inputs {
  padding: var(--space-8);
  background-color: var(--light-gray);
  border-right: 1px solid var(--ink-border);
}

.roi-outputs {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--canvas-white);
}

.slider-group {
  margin-bottom: var(--space-6);
}

.slider-header {
  display: flex;
  justify-content: space-between;
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.slider-val {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--action-blue);
}

.roi-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--ink-border);
  outline: none;
}

.roi-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--action-blue);
  border: 1px solid var(--ink-border);
  cursor: pointer;
  transition: transform 0.1s;
}

.roi-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.roi-output-card {
  padding: var(--space-4);
  background-color: var(--soft-blue);
  border: 1px solid var(--ink-border);
  border-radius: 8px;
  margin-bottom: var(--space-4);
  text-align: center;
}

.roi-output-label {
  font-size: 14px;
  color: var(--dark-gray);
  margin-bottom: var(--space-1);
}

.roi-output-val {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--core-black);
}

.roi-multiplier {
  font-size: 2.2rem;
  color: var(--signal-pink);
}

/* Timeline Components */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background-color: var(--ink-border);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-8);
}

.timeline-dot {
  position: absolute;
  left: -29px;
  top: 4px;
  width: 7px;
  height: 7px;
  background-color: var(--canvas-white);
  border: 1px solid var(--ink-border);
  border-radius: 50%;
}

.timeline-dot.active {
  background-color: var(--signal-pink);
  border-color: var(--signal-pink);
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dark-gray);
  margin-bottom: var(--space-1);
}

.timeline-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: var(--space-2);
}

/* Step By Step Layout (How It Works) */
.steps-layout {
  display: flex;
  gap: var(--space-12);
}

.steps-sidebar {
  width: 300px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
  height: calc(100vh - var(--header-height) - 48px);
  overflow-y: auto;
}

.steps-content {
  flex: 1;
}

.step-nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--dark-gray);
  border-left: 2px solid #E1E1DE;
  font-size: 15px;
  margin-bottom: 4px;
}

.step-nav-link:hover {
  color: var(--core-black);
  text-decoration: none;
}

.step-nav-link.active {
  color: var(--core-black);
  font-weight: 600;
  border-left-color: var(--signal-pink);
}

.step-section {
  padding-bottom: var(--space-16);
  border-bottom: 1px solid #E1E1DE;
  margin-bottom: var(--space-16);
}

.step-meta {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  align-items: center;
}

.step-duration {
  font-family: var(--font-mono);
  font-size: 12px;
  border: 1px solid var(--ink-border);
  padding: 2px 6px;
  background-color: var(--soft-blue);
}

.do-dont-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin: var(--space-4) 0;
}

.do-card, .dont-card {
  padding: var(--space-4);
  border: 1px solid var(--ink-border);
  border-radius: 8px;
}

.do-card { background-color: #EBFBEE; border-color: #B2F2BB; }
.dont-card { background-color: #FFF5F5; border-color: #FFC9C9; }

/* Demo Console styling */
.demo-console {
  display: grid;
  grid-template-columns: 280px 1fr;
  border: 1px solid var(--ink-border);
  border-radius: 12px;
  overflow: hidden;
  height: 600px;
}

.demo-sidebar {
  border-right: 1px solid var(--ink-border);
  background-color: var(--light-gray);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.demo-workspace {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.demo-workspace-header {
  height: 48px;
  border-bottom: 1px solid var(--ink-border);
  background-color: var(--light-gray);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  justify-content: space-between;
}

.demo-workspace-content {
  flex: 1;
  padding: var(--space-6);
  overflow-y: auto;
  background-color: var(--canvas-white);
}

.demo-scenario-btn {
  width: 100%;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--ink-border);
  background-color: var(--canvas-white);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 14px;
  transition: all 0.15s ease;
}

.demo-scenario-btn.active {
  background-color: var(--action-blue);
  color: var(--canvas-white);
}

.demo-timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.demo-timeline-step {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  opacity: 0.4;
  transition: opacity 0.2s ease;
}

.demo-timeline-step.active {
  opacity: 1;
}

.demo-timeline-dot {
  width: 8px;
  height: 8px;
  border: 1px solid var(--ink-border);
  border-radius: 50%;
  margin-top: 5px;
  background-color: var(--canvas-white);
}

.demo-timeline-step.active .demo-timeline-dot {
  background-color: var(--signal-pink);
  border-color: var(--signal-pink);
}

/* Feature Matrix Table */
.feature-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
}

.feature-table th, .feature-table td {
  border: 1px solid var(--ink-border);
  padding: var(--space-3) var(--space-4);
  text-align: left;
}

.feature-table th {
  background-color: var(--light-gray);
  font-family: var(--font-display);
  font-weight: 600;
}

.feature-table tr:nth-child(even) {
  background-color: var(--light-gray);
}

.check-icon {
  color: var(--success-green);
  font-weight: bold;
}

/* Footer structure matching CIN/PAN legal requirements */
.footer {
  background-color: var(--light-gray);
  border-top: 1px solid var(--ink-border);
  padding: var(--space-16) 0 var(--space-8) 0;
  font-size: 14px;
}

.footer h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.footer-col {
  margin-bottom: var(--space-8);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--dark-gray);
}

.footer-links a:hover {
  color: var(--signal-pink);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid #E1E1DE;
  padding-top: var(--space-8);
  margin-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  color: var(--dark-gray);
}

.footer-legal-block {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--dark-gray);
  background: var(--canvas-white);
  padding: var(--space-4);
  border: 1px solid var(--ink-border);
  margin-top: var(--space-6);
  border-radius: 4px;
}

/* Responsiveness overrides */
@media (max-width: 991px) {
  h1 { font-size: 3rem; }
  h2 { font-size: 2rem; }
  .grid-cols-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
  .roi-calculator-container { grid-template-columns: 1fr; }
  .roi-inputs { border-right: none; border-bottom: 1px solid var(--ink-border); }
  .steps-layout { flex-direction: column; }
  .steps-sidebar { width: 100%; position: relative; top: 0; height: auto; border-bottom: 1px solid var(--ink-border); padding-bottom: var(--space-4); }
  .demo-console { grid-template-columns: 1fr; height: auto; }
  .demo-sidebar { border-right: none; border-bottom: 1px solid var(--ink-border); }
}

@media (max-width: 767px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.6rem; }
  .grid-cols-5 { grid-template-columns: 1fr; }
  .grid-cols-2 { grid-template-columns: 1fr; }
  .grid-cols-3 { grid-template-columns: 1fr; }
  .grid-cols-4 { grid-template-columns: 1fr; }
  .navbar { padding: 0 var(--space-4); }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .mobile-toggle { display: block; }
  .col-6, .col-4, .col-3 { width: 100%; }
  .do-dont-grid { grid-template-columns: 1fr; }
}

/* Accessibility: prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}