/* ============================================
   ARC AI — Design System & Styles
   A product by Lawmwad Engineering Lab
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-bg: #07070D;
  --color-surface: #0D0D1E;
  --color-surface-2: #131327;
  --color-surface-3: #191934;
  --color-border: rgba(255, 255, 255, 0.07);
  --color-border-hover: rgba(107, 94, 248, 0.35);

  --color-primary: #6B5EF8;
  --color-primary-light: #8F84FF;
  --color-primary-dark: #4E3FD8;
  --color-primary-glow: rgba(107, 94, 248, 0.15);
  --color-primary-glow-strong: rgba(107, 94, 248, 0.25);

  --color-accent: #06D6A0;
  --color-accent-light: #2FEFB8;
  --color-accent-glow: rgba(6, 214, 160, 0.12);

  --color-alert: #F59E0B;
  --color-alert-glow: rgba(245, 158, 11, 0.12);

  --color-text: #EAEAF4;
  --color-text-secondary: #9999B8;
  --color-text-muted: #5C5C80;

  /* Industry tag colors */
  --color-banking: #60A5FA;
  --color-health: #34D399;
  --color-edu: #A78BFA;
  --color-hr: #FB923C;
  --color-finance: #FBBF24;
  --color-retail: #F472B6;
  --color-security: #F87171;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;

  /* Effects */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-card: 0 4px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(107, 94, 248, 0.12);
  --transition-fast: 0.18s ease;
  --transition-base: 0.28s ease;
  --transition-slow: 0.5s ease;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #fff;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.35rem); }

p {
  color: var(--color-text-secondary);
  line-height: 1.75;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
}

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

.text-center { text-align: center; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Section Header --- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  background: var(--color-primary-glow);
  border: 1px solid rgba(107, 94, 248, 0.25);
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  max-width: 580px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.8rem 1.8rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(107, 94, 248, 0.35);
}

.btn--primary:hover {
  background: var(--color-primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(107, 94, 248, 0.45);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(4px);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  background: var(--color-primary-glow);
}

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

.btn--ghost:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

.btn--lg {
  padding: 1rem 2.2rem;
  font-size: 1.05rem;
}

.btn--sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
}

.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  align-items: center;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 9999;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav.scrolled {
  background: rgba(7, 7, 13, 0.92);
  backdrop-filter: blur(24px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav.menu-open {
  background: var(--color-bg);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text);
  text-decoration: none;
}

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

.nav__logo-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-light);
  background: var(--color-primary-glow);
  border: 1px solid rgba(107, 94, 248, 0.2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.nav__logo-icon svg {
  width: 20px;
  height: 20px;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav__logo-text span {
  color: var(--color-primary-light);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav__link {
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

.nav__cta {
  margin-left: var(--space-sm);
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: all var(--transition-fast);
  border-radius: 2px;
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(80px);
}

.hero__glow--1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(107, 94, 248, 0.18) 0%, transparent 70%);
  top: -100px;
  left: -150px;
}

.hero__glow--2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 214, 160, 0.10) 0%, transparent 70%);
  bottom: 0;
  right: -100px;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.hero__content {
  max-width: 560px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: var(--space-xl);
}

.hero__badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero__title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.12;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-xl);
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-xl);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.hero__meta-sep {
  opacity: 0.4;
}

/* --- Terminal Demo --- */
.hero__terminal {
  position: relative;
}

.terminal {
  background: var(--color-surface-2);
  border: 1px solid rgba(107, 94, 248, 0.2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(107, 94, 248, 0.1);
}

.terminal__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.9rem var(--space-md);
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--color-border);
}

.terminal__dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.terminal__dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.terminal__dots span:nth-child(1) { background: #FF5F57; }
.terminal__dots span:nth-child(2) { background: #FEBC2E; }
.terminal__dots span:nth-child(3) { background: #28C840; }

.terminal__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  flex: 1;
  text-align: center;
}

.terminal__badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-glow);
  border: 1px solid rgba(6, 214, 160, 0.2);
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  flex-shrink: 0;
  transition: color var(--transition-base), background var(--transition-base);
}

.terminal__body {
  padding: var(--space-lg);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal__history {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  opacity: 0.45;
  font-size: 0.75rem;
  margin-bottom: var(--space-sm);
}

.terminal__history-item {
  color: var(--color-text-muted);
  display: flex;
  gap: var(--space-sm);
  line-height: 1.5;
}

.terminal__history-item .t-prompt {
  color: var(--color-primary-light);
  flex-shrink: 0;
}

.terminal__history-item .t-res {
  color: var(--color-accent);
  margin-left: var(--space-md);
  font-size: 0.72rem;
}

.terminal__input-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text);
  min-height: 1.5rem;
}

.terminal__prompt {
  color: var(--color-primary-light);
  font-size: 1rem;
  flex-shrink: 0;
}

.terminal__cursor-text {
  color: var(--color-text);
}

.terminal__cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--color-primary-light);
  border-radius: 1px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

.terminal__cursor.hidden {
  opacity: 0;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.terminal__thinking {
  display: none;
  align-items: center;
  gap: 5px;
  padding: var(--space-xs) 0;
  margin-left: var(--space-md);
}

.terminal__thinking.visible {
  display: flex;
}

.terminal__thinking span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-text-muted);
  animation: thinking-dot 1.2s ease-in-out infinite;
}

.terminal__thinking span:nth-child(2) { animation-delay: 0.2s; }
.terminal__thinking span:nth-child(3) { animation-delay: 0.4s; }

@keyframes thinking-dot {
  0%, 80%, 100% { transform: scale(0.7); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.terminal__response {
  display: none;
  color: var(--color-accent);
  font-size: 0.82rem;
  line-height: 1.6;
  border-left: 2px solid var(--color-accent-glow);
  padding-left: var(--space-md);
  margin-left: var(--space-sm);
  animation: fade-in 0.4s ease;
}

.terminal__response.visible {
  display: block;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Hero Scroll Indicator --- */
.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  animation: float 2.2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(180deg, var(--color-primary), transparent);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Problem Strip --- */
.problem-strip {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
}

.problem-strip__inner {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  justify-content: center;
  flex-wrap: wrap;
}

.problem-strip__col {
  flex: 1;
  min-width: 240px;
  max-width: 360px;
}

.problem-strip__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

.problem-strip__label--before {
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
}

.problem-strip__label--after {
  color: var(--color-accent);
  background: var(--color-accent-glow);
  border: 1px solid rgba(6, 214, 160, 0.2);
}

.problem-strip__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.problem-strip__items span {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.problem-strip__col:first-child .problem-strip__items span::before {
  content: '—';
  color: var(--color-text-muted);
  font-size: 0.75rem;
  flex-shrink: 0;
}

.problem-strip__col:last-child .problem-strip__items span::before {
  content: '✓';
  color: var(--color-accent);
  font-size: 0.75rem;
  flex-shrink: 0;
  font-weight: 600;
}

.problem-strip__arrow {
  color: var(--color-primary);
  opacity: 0.5;
  flex-shrink: 0;
}

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature-card--wide {
  grid-column: span 3;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.feature-card:hover {
  border-color: rgba(107, 94, 248, 0.25);
  box-shadow: 0 8px 32px rgba(107, 94, 248, 0.08);
}

.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-glow);
  border: 1px solid rgba(107, 94, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary-light);
}

.feature-card__icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.feature-card__body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.feature-card__body p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.feature-card__query {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-top: auto;
}

.feature-card__query--alert {
  border-color: rgba(245, 158, 11, 0.2);
  background: rgba(245, 158, 11, 0.04);
  color: var(--color-alert);
}

.feature-card__query--alert .feature-card__query-prompt {
  color: var(--color-alert);
}

.feature-card__query-prompt {
  color: var(--color-primary-light);
  flex-shrink: 0;
  font-size: 0.9rem;
  line-height: 1.3;
}

/* --- Roles Grid --- */
.roles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.role-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.role-card:hover {
  border-color: rgba(107, 94, 248, 0.25);
  transform: translateY(-3px);
}

.role-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.role-card__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.role-card__icon svg {
  width: 17px;
  height: 17px;
  stroke: currentColor;
}

.role-card__industry {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
}

.role-card__industry--banking { color: var(--color-banking); background: rgba(96, 165, 250, 0.1); }
.role-card__industry--health  { color: var(--color-health);  background: rgba(52, 211, 153, 0.1); }
.role-card__industry--edu     { color: var(--color-edu);     background: rgba(167, 139, 250, 0.1); }
.role-card__industry--hr      { color: var(--color-hr);      background: rgba(251, 146, 60, 0.1); }
.role-card__industry--finance { color: var(--color-finance); background: rgba(251, 191, 36, 0.1); }
.role-card__industry--retail  { color: var(--color-retail);  background: rgba(244, 114, 182, 0.1); }
.role-card__industry--security{ color: var(--color-security);background: rgba(248, 113, 113, 0.1); }

.role-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.role-card__list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.role-card__list li {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-left: var(--space-md);
  position: relative;
  line-height: 1.5;
}

.role-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.6;
}

/* --- Integration Diagram --- */
.integration-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-2xl);
  align-items: center;
  margin-bottom: var(--space-2xl);
}

.integration-diagram__systems,
.integration-diagram__outputs {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.integration-system,
.integration-output {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.7rem var(--space-md);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  transition: border-color var(--transition-fast);
}

.integration-system:hover,
.integration-output:hover {
  border-color: rgba(107, 94, 248, 0.2);
  color: var(--color-text);
}

.integration-system__icon,
.integration-output__icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.integration-system__icon svg,
.integration-output__icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

.integration-output {
  border-color: rgba(6, 214, 160, 0.15);
}

.integration-output__icon {
  color: var(--color-accent);
}

.integration-diagram__center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.integration-diagram__arc {
  position: relative;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--color-primary-glow);
  border: 1px solid rgba(107, 94, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.integration-diagram__arc-pulse {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 1px solid rgba(107, 94, 248, 0.2);
  animation: arc-pulse 2.5s ease-in-out infinite;
}

.integration-diagram__arc-pulse::after {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 1px solid rgba(107, 94, 248, 0.08);
  animation: arc-pulse 2.5s ease-in-out infinite 0.8s;
}

@keyframes arc-pulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.06); opacity: 0.2; }
}

.integration-diagram__arc-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-light);
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.integration-note {
  text-align: center;
}

.integration-note p {
  max-width: 620px;
  margin: 0 auto;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* --- Principles Grid --- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.principle-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.principle-card:hover {
  border-color: rgba(107, 94, 248, 0.25);
}

.principle-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.principle-card:hover::before {
  opacity: 1;
}

.principle-card__number {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.principle-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-glow);
  border: 1px solid rgba(107, 94, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-light);
  margin-bottom: var(--space-lg);
}

.principle-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

.principle-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.principle-card > p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.principle-card__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
}

.principle-card__features li {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.principle-card__features li::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}

/* --- CTA / Demo Section --- */
.cta-section {
  padding: var(--space-5xl) 0;
  position: relative;
  overflow: hidden;
}

.cta-section__glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 50%, rgba(107, 94, 248, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.cta-section__text .section-label {
  margin-bottom: var(--space-lg);
}

.cta-section__text h2 {
  margin-bottom: var(--space-md);
}

.cta-section__text p {
  margin-bottom: var(--space-xl);
  font-size: 1rem;
}

.cta-section__promises {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.cta-section__promises li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}

.cta-section__promises li svg {
  color: var(--color-accent);
  flex-shrink: 0;
}

/* --- Demo Form --- */
.demo-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.75rem var(--space-md);
  outline: none;
  transition: border-color var(--transition-fast);
  width: 100%;
  -webkit-appearance: none;
}

.form-group input::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(107, 94, 248, 0.1);
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235C5C80' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group select option {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.demo-form__btn {
  width: 100%;
  justify-content: center;
  margin-top: var(--space-xs);
}

/* --- Footer --- */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  text-decoration: none;
}

.footer__logo-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-light);
  background: var(--color-primary-glow);
  border: 1px solid rgba(107, 94, 248, 0.2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.footer__logo-icon svg {
  width: 18px;
  height: 18px;
}

.footer__logo-text {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.footer__brand p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.footer__parent {
  font-size: 0.8rem !important;
  color: var(--color-text-muted) !important;
}

.footer__parent a {
  color: var(--color-primary-light);
}

.footer__heading {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-text);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer__socials {
  display: flex;
  gap: var(--space-md);
}

.footer__socials a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__socials a:hover {
  color: var(--color-text);
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* --- Responsive --- */
@media (max-width: 1100px) {
  .roles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .integration-diagram {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .integration-diagram__systems,
  .integration-diagram__outputs {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .integration-system,
  .integration-output {
    flex: 1;
    min-width: 140px;
  }
  .integration-diagram__center {
    order: -1;
  }
  .integration-diagram__arc {
    width: 90px;
    height: 90px;
  }
}

@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    padding-bottom: var(--space-4xl);
  }
  .hero__content {
    max-width: 100%;
    text-align: center;
  }
  .hero__badge {
    justify-content: center;
  }
  .btn-group {
    justify-content: center;
  }
  .hero__meta {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-card--wide {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }
  .principles-grid {
    grid-template-columns: 1fr;
  }
  .cta-section__inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer__brand {
    grid-column: span 2;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-xs);
    z-index: 9998;
  }

  .nav__links.open {
    display: flex;
  }

  .nav__link {
    padding: 0.75rem var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
  }

  .nav__cta {
    margin-left: 0;
    margin-top: var(--space-xs);
    text-align: center;
    justify-content: center;
  }

  .nav__toggle {
    display: block;
  }

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

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

  .footer__brand {
    grid-column: span 1;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .section {
    padding: var(--space-4xl) 0;
  }

  .problem-strip__inner {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-xl);
  }

  .problem-strip__arrow {
    transform: rotate(90deg);
    align-self: center;
  }

  .problem-strip__col {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 2.8rem);
  }

  .hero__terminal {
    display: none;
  }

  .features-grid {
    gap: var(--space-md);
  }

  .integration-system,
  .integration-output {
    min-width: 100%;
  }
}