/*
  Viaro Teaser Site Styles
  This stylesheet uses CSS custom properties for easy theming. It aims for
  accessibility, responsiveness, and performance with minimal bloat.
*/

:root {
  --color-bg: #0B132B;
  --color-primary: #1F7AE0;
  --color-secondary: #1C2541;
  --color-text: #E6E8EC;
  --color-text-light: #FFFFFF;
  --color-card-bg: rgba(255, 255, 255, 0.04);
  --font-family: 'Inter', system-ui, sans-serif;
  --max-width: 1200px;
  --radius: 8px;
  --transition: 0.3s ease;
}

/* Global Resets */
* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
}

body.no-js .hero-video {
  display: none;
}

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

a:hover, a:focus {
  text-decoration: underline;
}

.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: -1000;
}

.skip-link:focus {
  position: fixed;
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: var(--color-text-light);
  border-radius: var(--radius);
  z-index: 10000;
}

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  text-align: center;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  font-size: 1rem;
  line-height: 1;
}

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

.btn-primary:hover, .btn-primary:focus {
  background-color: #155db7;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover, .btn-secondary:focus {
  background-color: var(--color-primary);
  color: var(--color-text-light);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Header */
#site-header {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(11, 19, 43, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

#site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.logo img {
  height: 40px;
  width: auto;
  display: block;
}

.nav .btn {
  margin-left: 1rem;
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
}

.hero-overlay {
  position: relative;
  z-index: 2;
  padding: 2rem;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text-light);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.hero-subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem);
  margin-bottom: 2rem;
  color: var(--color-text);
}

.hero-actions .btn + .btn {
  margin-left: 1rem;
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--color-text-light);
}

/* How It Works */
.how-it-works .steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.step {
  flex: 1 1 30%;
  background-color: var(--color-card-bg);
  padding: 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  backdrop-filter: blur(4px);
}

.step-icon {
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.step h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-light);
}

.step p {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* Why Viaro */
.why-viaro .features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.why-viaro .features li {
  background-color: var(--color-card-bg);
  padding: 1.5rem;
  border-radius: var(--radius);
  backdrop-filter: blur(4px);
}

.why-viaro .features h3 {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  color: var(--color-text-light);
}

.why-viaro .features p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text);
}

/* Safety & Trust */
.safety-trust p {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
}

/* Sign Up */
.signup-form {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.signup-form .form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.signup-form input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 2px solid var(--color-secondary);
  background-color: var(--color-card-bg);
  color: var(--color-text-light);
  font-size: 1rem;
}

.signup-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: rgba(31, 122, 224, 0.1);
}

.privacy-note {
  font-size: 0.75rem;
  color: var(--color-text);
}

.form-message {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-primary);
  min-height: 1.5em;
}

.form-message.error {
  color: #FF6F61;
}

.form-message.success {
  color: #28A745;
}

/* FAQ */
.faq details {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem 0;
}

.faq summary {
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  padding-right: 2rem;
  color: var(--color-text-light);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-primary);
  transition: transform var(--transition);
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq p {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

/* Investors & Partners */
.investors-partners p {
  max-width: 700px;
  margin: 0 auto;
  font-size: 1rem;
  color: var(--color-text);
}

/* Footer */
.site-footer {
  background-color: rgba(11, 19, 43, 0.9);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 2rem 0;
  font-size: 0.875rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer-inner .social-links {
  display: flex;
  gap: 1rem;
}

.footer-inner .social-links a {
  color: var(--color-text);
  transition: color var(--transition);
}

.footer-inner .social-links a:hover, .footer-inner .social-links a:focus {
  color: var(--color-primary);
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--color-text);
  font-weight: 500;
}

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

.footer-copy {
  margin-top: 0.5rem;
  color: var(--color-text);
}

/* Utility classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}

@media (max-width: 768px) {
  .how-it-works .steps {
    flex-direction: column;
  }
  .step {
    flex: 1 1 100%;
  }
  .hero-actions .btn {
    margin-bottom: 0.5rem;
  }
  .hero-actions .btn + .btn {
    margin-left: 0;
  }
}

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