/* CSS Custom Properties */
:root {
  --color-bg: #faf9f7;
  --color-text: #1a1a1a;
  --color-accent: #e07b39;
  --color-muted: #6b6b6b;
  --color-border: #e0ddd8;
  --color-success: #2d9e6b;
  --color-near-black: #1a1a1a;

  --radius: 6px;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
}

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

/* Typography */
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
}

p {
  margin: 0;
}

/* Layout */
main {
  min-height: 100vh;
}

header {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header .logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-accent);
}

header nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9375rem;
}

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

section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Screen Reader Only */
.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;
}

/* Hero Section */
#hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-lg);
  text-align: left;
}

#hero .subheadline {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 600px;
}

/* Email Form */
form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-width: 500px;
  margin-top: var(--space-md);
}

@media (min-width: 768px) {
  form {
    flex-direction: row;
  }
}

form input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  background: white;
  color: var(--color-text);
  transition: all 0.2s ease-out;
}

form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(224, 123, 57, 0.1);
}

form input[type="email"].shake {
  animation: shake 0.5s ease-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

.field-error {
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: block;
}

/* Button States */
form button[type="submit"] {
  padding: 0.75rem 1.5rem;
  background-color: var(--color-accent);
  color: white;
  font-weight: 700;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease-out;
  position: relative;
  white-space: nowrap;
}

form button[type="submit"]:hover {
  background-color: #d16c2b;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(224, 123, 57, 0.2);
}

form button[type="submit"]:active {
  transform: translateY(0);
}

form button[type="submit"][data-state="loading"] {
  opacity: 0.7;
  cursor: not-allowed;
}

form button[type="submit"][data-state="success"] {
  background-color: var(--color-success);
}

form button .btn-label,
form button .btn-loading,
form button .btn-success {
  display: inline-block;
}

form button[data-state="idle"] .btn-loading,
form button[data-state="idle"] .btn-success,
form button[data-state="loading"] .btn-label,
form button[data-state="loading"] .btn-success,
form button[data-state="success"] .btn-label,
form button[data-state="success"] .btn-loading {
  display: none;
}

/* Trust Bar */
.trust-bar {
  padding: var(--space-xl) 0;
  text-align: center;
}

.trust-bar p {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
}

#signup-counter {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1rem;
}

/* Benefits Section */
.benefits {
  padding: var(--space-2xl) 0;
}

.benefit {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  margin-bottom: var(--space-xl);
}

.benefit-num {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
}

.benefit div {
  flex: 1;
}

.benefit h3 {
  margin-bottom: var(--space-xs);
}

.benefit p {
  color: var(--color-muted);
}

/* Social Proof */
.social-proof {
  padding: var(--space-2xl) 0;
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .social-proof {
    grid-template-columns: 1fr 1fr;
  }
}

.social-proof blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-md);
  font-style: italic;
  color: var(--color-text);
  margin: 0;
}

.social-proof cite {
  display: block;
  margin-top: var(--space-sm);
  font-style: normal;
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Final CTA */
.final-cta {
  padding: var(--space-2xl) 0;
  text-align: center;
}

.final-cta h2 {
  font-size: 2rem;
  margin-bottom: var(--space-lg);
}

.final-cta form {
  margin: 0 auto;
}

/* Sticky Footer CTA */
.footer-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-near-black);
  color: white;
  padding: var(--space-md);
  text-align: center;
  transform: translateY(100%);
  transition: transform 0.3s ease-out;
  z-index: 100;
}

.footer-cta.footer-cta--visible {
  transform: translateY(0);
}

.footer-cta a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

.footer-cta a:hover {
  text-decoration: underline;
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

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

/* Staggered delays for benefits */
.benefit:nth-child(1) {
  --delay: 0s;
}

.benefit:nth-child(2) {
  --delay: 0.15s;
}

.benefit:nth-child(3) {
  --delay: 0.3s;
}

.benefit.reveal {
  transition-delay: var(--delay, 0s);
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
  }

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