:root {
  --bg-dark: #1a1f2e;
  --bg-darker: #13171f;
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --accent-blue: #157eeb;
  --accent-red: #fb4a4a;
  --accent-yellow: #fda70d;
  --accent-bitcoin: #f7931a;
  --card-bg: #2d3748;
  --card-hover: #374357;
  --border-color: #4a5568;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.4);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
  position: relative;
}

.logo {
  width: 280px;
  height: 280px;
  margin: 0 auto 2rem;
  filter: drop-shadow(0 10px 30px rgba(21, 126, 235, 0.3));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.company-name {
  font-size: 3rem;
  font-weight: 300;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-red), var(--accent-yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.5rem;
  color: var(--accent-blue);
  margin-bottom: 2rem;
  font-weight: 400;
}

.description {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.description p {
  margin-bottom: 1rem;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2rem;
  color: var(--accent-blue);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

.projects {
  padding: 6rem 0;
  background-color: var(--bg-darker);
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  font-weight: 300;
  letter-spacing: -0.5px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.project-card {
  background-color: var(--card-bg);
  border-radius: 16px;
  padding: 2.5rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-red), var(--accent-yellow));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover {
  transform: translateY(-8px);
  background-color: var(--card-hover);
  box-shadow: var(--shadow-hover);
}

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

.project-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.project-name {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  font-size: 0.95rem;
  line-height: 1.6;
}

.project-link-text {
  color: var(--accent-blue);
  font-weight: 500;
  font-size: 1rem;
  transition: transform 0.3s ease;
  display: inline-block;
}

.project-card:hover .project-link-text {
  transform: translateX(4px);
}

.project-card.external .project-icon {
  filter: drop-shadow(0 4px 8px rgba(247, 147, 26, 0.4));
}

.contact {
  padding: 6rem 0;
  background-color: var(--bg-dark);
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 3rem;
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  position: relative;
  margin-bottom: 2.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1.25rem 1rem 0.5rem;
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-blue);
  background-color: var(--card-hover);
}

.form-group label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: all 0.3s ease;
  pointer-events: none;
}

.form-group input:not(:placeholder-shown) + label,
.form-group input:focus + label,
.form-group textarea:not(:placeholder-shown) + label,
.form-group textarea:focus + label {
  top: 0.25rem;
  font-size: 0.75rem;
  color: var(--accent-blue);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.submit-btn {
  width: 100%;
  padding: 1.25rem;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-red));
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(21, 126, 235, 0.4);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(21, 126, 235, 0.6);
}

.submit-btn:active {
  transform: translateY(0);
}

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

#flash-message-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  width: 90%;
  max-width: 500px;
}

.alert {
  padding: 1rem 1.5rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  position: relative;
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.alert-success {
  background-color: #10b981;
  color: white;
  border-left: 4px solid #059669;
}

.alert-danger {
  background-color: #ef4444;
  color: white;
  border-left: 4px solid #dc2626;
}

.alert .close {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  line-height: 1;
  opacity: 0.8;
  cursor: pointer;
  padding: 0;
  margin-left: 1rem;
}

.alert .close:hover {
  opacity: 1;
}

.footer {
  padding: 3rem 0 2rem;
  background-color: var(--bg-darker);
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.copyright {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.company-info {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0.25rem 0;
}

@media (max-width: 768px) {
  .company-name {
    font-size: 2rem;
  }

  .tagline {
    font-size: 1.25rem;
  }

  .description {
    font-size: 1rem;
  }

  .logo {
    width: 200px;
    height: 200px;
  }

  .section-title {
    font-size: 2rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .container {
    padding: 0 1.5rem;
  }
}

@media (max-width: 480px) {
  .company-name {
    font-size: 1.75rem;
  }

  .logo {
    width: 160px;
    height: 160px;
  }
}

/* Hide reCAPTCHA badge by default */
.grecaptcha-badge {
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s ease;
}

/* Show reCAPTCHA badge only when contact section is visible */
.contact-visible .grecaptcha-badge {
  visibility: visible;
  opacity: 1;
}