/* FlowSight Landing Page Styles */
/* Design: Stripe/Linear/Vercel inspired - clean, professional, technical */

/* ============================================
   CSS Variables
   ============================================ */
:root {
  /* FlowSight Brand Colors */
  --flowsight-mint: #06D5A7;
  --flowsight-teal-green: #039787;
  --flowsight-teal-blue: #0E97AC;
  --flowsight-dark-teal: #034660;
  --flowsight-purple: #50367E;
  
  /* Primary Colors (mapped from brand) */
  --color-primary: var(--flowsight-dark-teal);
  --color-primary-dark: #022a3d;
  --color-primary-light: #045a7a;
  
  /* Accent Colors (mapped from brand) */
  --color-accent: var(--flowsight-mint);
  --color-accent-light: #1be5b8;
  --color-accent-dark: var(--flowsight-teal-green);
  
  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-muted: #f1f5f9;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  
  /* Code */
  --color-code-bg: #0f172a;
  --color-code-text: #e2e8f0;
  --color-code-comment: #64748b;
  --color-code-keyword: #c084fc;
  --color-code-string: #4ade80;
  --color-code-function: #60a5fa;
  
  /* 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;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  
  /* Sizing */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  
  /* Effects */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  --transition: 150ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent-dark);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

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

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

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

.container--narrow {
  max-width: var(--max-width-narrow);
}

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

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 32px;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav__links a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

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

/* Mobile nav toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: var(--transition);
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }
  
  .nav__toggle {
    display: block;
  }
  
  .nav__cta .btn--secondary {
    display: none;
  }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
  color: white;
}

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

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

.btn--accent {
  background: var(--color-accent);
  color: white;
}

.btn--accent:hover {
  background: var(--color-accent-dark);
  color: white;
}

.btn--large {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn--small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn--full {
  width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding-top: calc(64px + var(--space-4xl));
  padding-bottom: var(--space-4xl);
  background: linear-gradient(180deg, var(--color-bg-subtle) 0%, var(--color-bg) 100%);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero__content {
  max-width: 560px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 100px;
  margin-bottom: var(--space-lg);
}

.hero__title {
  margin-bottom: var(--space-lg);
}

.hero__subtitle {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

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

.hero__code {
  background: var(--color-code-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.hero__code-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hero__code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.hero__code-dot--red { background: #ff5f57; }
.hero__code-dot--yellow { background: #febc2e; }
.hero__code-dot--green { background: #28c840; }

.hero__code-title {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.hero__code pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-code-text);
  overflow-x: auto;
}

.hero__code .comment { color: var(--color-code-comment); }
.hero__code .keyword { color: var(--color-code-keyword); }
.hero__code .string { color: var(--color-code-string); }
.hero__code .function { color: var(--color-code-function); }

@media (max-width: 968px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero__content {
    max-width: 100%;
  }
  
  .hero__cta {
    justify-content: center;
  }
  
  .hero__code {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
  }
}

/* ============================================
   Problem Section
   ============================================ */
.problem {
  background: var(--color-bg);
}

.problem__inner {
  text-align: center;
}

.problem__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.problem__title {
  margin-bottom: var(--space-lg);
}

.problem__subtitle {
  font-size: 1.125rem;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.problem__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.problem__card {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: left;
  transition: all var(--transition);
}

.problem__card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.problem__card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
}

.problem__card h3 {
  margin-bottom: var(--space-sm);
}

.problem__card p {
  font-size: 0.9375rem;
}

@media (max-width: 768px) {
  .problem__grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Features Section
   ============================================ */
.features {
  background: var(--color-bg-subtle);
}

.features__inner {
  text-align: center;
}

.features__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.features__title {
  margin-bottom: var(--space-lg);
}

.features__subtitle {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.feature {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: left;
  transition: all var(--transition);
}

.feature:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.feature__icon {
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  color: white;
}

.feature__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.feature__desc {
  font-size: 0.9375rem;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .features__grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
  background: var(--color-bg);
}

.how-it-works__inner {
  text-align: center;
}

.how-it-works__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.how-it-works__title {
  margin-bottom: var(--space-lg);
}

.how-it-works__subtitle {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(16.67% + 20px);
  right: calc(16.67% + 20px);
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}

.step {
  position: relative;
  z-index: 1;
}

.step__number {
  width: 80px;
  height: 80px;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 auto var(--space-lg);
}

.step__title {
  margin-bottom: var(--space-sm);
}

.step__desc {
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.step__code {
  background: var(--color-code-bg);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: left;
}

.step__code code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-code-text);
  white-space: pre-wrap;
  word-break: break-all;
}

@media (max-width: 768px) {
  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .steps::before {
    display: none;
  }
}

/* ============================================
   Pricing Section
   ============================================ */
.pricing {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
}

.pricing__inner {
  text-align: center;
}

.pricing__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-light);
  margin-bottom: var(--space-md);
}

.pricing__title {
  color: white;
  margin-bottom: var(--space-lg);
}

.pricing__subtitle {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.pricing__card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  max-width: 400px;
  margin: 0 auto var(--space-xl);
  box-shadow: var(--shadow-xl);
}

.pricing__badge {
  display: inline-block;
  background: var(--color-accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--space-xs) var(--space-md);
  border-radius: 100px;
  margin-bottom: var(--space-lg);
}

.pricing__price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.pricing__price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.pricing__note {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.pricing__features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--space-xl);
}

.pricing__features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.pricing__features li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
}

.pricing__disclaimer {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.pricing__contact {
  color: var(--color-accent-light);
}

.pricing__contact:hover {
  color: white;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
  background: var(--color-bg-subtle);
}

.cta__inner {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta__title {
  margin-bottom: var(--space-lg);
}

.cta__subtitle {
  font-size: 1.125rem;
  margin-bottom: var(--space-xl);
}

.cta__buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.cta__disclaimer {
  margin-top: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-code-bg);
  color: var(--color-text-muted);
  padding: var(--space-3xl) 0 var(--space-xl);
}

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

.footer__brand {
  max-width: 280px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: white;
  margin-bottom: var(--space-md);
}

.footer__logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1rem;
}

.footer__desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.footer__column h4 {
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__links {
  list-style: none;
}

.footer__links li {
  margin-bottom: var(--space-sm);
}

.footer__links a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer__links a:hover {
  color: white;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  margin-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
}

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

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

.footer__legal-links a {
  color: var(--color-text-muted);
}

.footer__legal-links a:hover {
  color: white;
}

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

.footer__social a {
  color: var(--color-text-muted);
  font-size: 1.25rem;
  transition: color var(--transition);
}

.footer__social a:hover {
  color: white;
}

@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
  
  .footer__brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }
  
  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .footer__legal {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .footer__inner {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Waitlist Form
   ============================================ */
.waitlist-form {
  display: flex;
  gap: var(--space-sm);
  max-width: 400px;
  margin: 0 auto;
}

.waitlist-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition);
}

.waitlist-form input:focus {
  border-color: var(--color-accent);
}

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

@media (max-width: 480px) {
  .waitlist-form {
    flex-direction: column;
  }
}

/* ============================================
   Accessibility
   ============================================ */
.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  z-index: 10000;
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--space-md);
  color: white;
}

/* Focus styles for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Remove default outline for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================
   Utilities
   ============================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }

.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }