/* ==========================================================================
   Reinforce Marketing Site - Styles
   ========================================================================== */

/* CSS Custom Properties (Design System)
   ========================================================================== */
:root {
  /* Primary - Overpass coral red */
  --color-primary: #E85A5A;
  --color-primary-hover: #D64545;
  --color-primary-light: rgba(232, 90, 90, 0.1);

  /* Background */
  --color-bg-dark: #0D0D0D;
  --color-bg-dark-elevated: #1A1A1A;
  --color-bg-light: #FFFFFF;
  --color-bg-light-muted: #F5F5F5;

  /* Text */
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #A0A0A0;
  --color-text-muted: #666666;

  /* Accent */
  --color-success: #4ADE80;
  --color-warning: #FACC15;

  /* Borders */
  --color-border: rgba(255, 255, 255, 0.1);

  /* Font Stack */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Line Heights */
  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

section {
  padding: var(--space-24) 0;
}

@media (min-width: 768px) {
  section {
    padding: var(--space-32) 0;
  }
}

/* Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  line-height: var(--leading-tight);
}

h1 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
}

h2 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
}

h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

@media (min-width: 768px) {
  h1 {
    font-size: var(--text-5xl);
  }

  h2 {
    font-size: var(--text-3xl);
  }
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-16);
}

/* Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  border-radius: 8px;
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  transition: background 0.2s, transform 0.1s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* Header
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: rgba(13, 13, 13, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

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

.logo {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
}

.btn-header {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

/* Hero Section
   ========================================================================== */
.hero {
  padding-top: calc(var(--space-32) + 60px);
  padding-bottom: var(--space-24);
  text-align: center;
}

.hero-title {
  margin-bottom: var(--space-6);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

.hero .btn {
  margin-bottom: var(--space-12);
}

.hero-image {
  max-width: 900px;
  margin: 0 auto;
}

.hero-screenshot-placeholder {
  background: var(--color-bg-dark-elevated);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  aspect-ratio: 16 / 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

.hero-screenshot,
.demo-screenshot {
  width: 100%;
  max-width: 800px;
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--color-border);
}

.demo-image {
  display: flex;
  justify-content: center;
  margin-top: var(--space-12);
}

.demo-screenshot {
  max-width: 700px;
}

@media (min-width: 768px) {
  .hero {
    padding-top: calc(var(--space-32) + 80px);
    padding-bottom: var(--space-32);
  }

  .hero-subtitle {
    font-size: var(--text-2xl);
  }
}

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

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

.problem-content p {
  margin-bottom: var(--space-6);
  color: var(--color-text-secondary);
}

.problem-content .highlight {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}

.problem-content .tagline {
  color: var(--color-text-primary);
}

.problem-content .tagline strong {
  color: var(--color-primary);
}

/* Features Section
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  background: var(--color-bg-dark-elevated);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-6);
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: var(--color-primary);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.feature-card h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

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

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-6xl);
  font-weight: var(--font-bold);
  color: rgba(232, 90, 90, 0.1);
  line-height: 1;
}

.step-icon {
  width: 64px;
  height: 64px;
  background: var(--color-primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  color: var(--color-primary);
  position: relative;
  z-index: 1;
}

.step h3 {
  margin-bottom: var(--space-2);
}

.step p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

.demo-placeholder {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  aspect-ratio: 16 / 9;
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

/* Pricing Section
   ========================================================================== */
.pricing {
  text-align: center;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto var(--space-8);
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.pricing-card {
  background: var(--color-bg-dark-elevated);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-8);
  text-align: left;
  position: relative;
}

.pricing-card-featured {
  border: 2px solid var(--color-primary);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  padding: var(--space-1) var(--space-4);
  border-radius: 20px;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

.pricing-card h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
}

.price {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.pricing-card-featured .price {
  color: var(--color-primary);
}

.price-period {
  font-size: var(--text-lg);
  font-weight: var(--font-normal);
  color: var(--color-text-secondary);
}

.price-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--space-8);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  color: var(--color-text-secondary);
  font-size: var(--text-base);
}

.pricing-features svg {
  color: var(--color-success);
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
  margin-bottom: var(--space-4);
}

.system-requirements {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* FAQ Section
   ========================================================================== */
.faq {
  background: var(--color-bg-dark-elevated);
}

.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) 0;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  text-align: left;
  cursor: pointer;
  transition: color 0.2s;
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  flex-shrink: 0;
  transition: transform 0.3s;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding-bottom: var(--space-6);
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

/* Footer
   ========================================================================== */
.footer {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
}

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

.copyright {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

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

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Utilities
   ========================================================================== */
@media (max-width: 767px) {
  br {
    display: none;
  }
}