/* ============================================
   CSS Variables & Custom Properties
   ============================================ */
:root {
  /* Colors - Modern gradient palette */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #ec4899;
  --accent: #14b8a6;

  /* Neutrals */
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.8);
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;

  /* Borders */
  --border-color: rgba(99, 102, 241, 0.2);
  --border-hover: rgba(99, 102, 241, 0.5);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Typography */
  --font-family:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ============================================
   Background Animation
   ============================================ */
.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.gradient-sphere {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: float 20s ease-in-out infinite;
}

.sphere-1 {
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  top: -200px;
  right: -200px;
  animation-delay: 0s;
}

.sphere-2 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  bottom: -100px;
  left: -100px;
  animation-delay: -7s;
}

.sphere-3 {
  width: 300px;
  height: 300px;
  background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -14s;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  25% {
    transform: translate(30px, -30px) rotate(5deg);
  }
  50% {
    transform: translate(-20px, 20px) rotate(-5deg);
  }
  75% {
    transform: translate(20px, 10px) rotate(3deg);
  }
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

/* ============================================
   Header
   ============================================ */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
  margin-bottom: var(--spacing-2xl);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.logo-icon {
  font-size: var(--font-size-2xl);
}

.nav {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.hero-badge {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--primary-light);
  margin-bottom: var(--spacing-xl);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
  }
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
}

.gradient-text {
  background: linear-gradient(
    135deg,
    var(--primary-light) 0%,
    var(--secondary) 50%,
    var(--accent) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Contact Form Section
   ============================================ */
.contact-section {
  padding: var(--spacing-3xl) 0;
}

.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.form-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.form-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.form-subtitle {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
}

/* Form Groups */
.form-group {
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.form-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.label-icon {
  font-size: var(--font-size-base);
}

.optional-tag {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: auto;
}

.form-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

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

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input:invalid:not(:placeholder-shown) {
  border-color: #ef4444;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 48px;
}

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

.form-error {
  display: block;
  font-size: var(--font-size-xs);
  color: #ef4444;
  margin-top: var(--spacing-xs);
  min-height: 1rem;
}

.char-count {
  display: block;
  text-align: right;
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* Submit Button */
.submit-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--primary-dark) 100%
  );
  border: none;
  border-radius: var(--radius-lg);
  color: white;
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  margin-top: var(--spacing-xl);
}

.submit-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.submit-btn:hover::before {
  left: 100%;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

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

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.submit-btn.loading .btn-text,
.submit-btn.loading .btn-icon {
  opacity: 0;
}

.submit-btn.loading .btn-loader {
  display: block;
}

.btn-loader {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  position: absolute;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Success Message */
.success-message, .error-message {
  text-align: center;
  padding: var(--spacing-2xl);
}

.success-message.hidden, .error-message.hidden {
  display: none;
}

.success-icon, .error-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  animation: bounce 0.5s ease;
}

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

.success-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--accent);
}

.error-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: #ef4444;
}

.success-text, .error-text {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.success-lead-id {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
  font-family: monospace;
}

.new-message-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.new-message-btn:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
}

.retry-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  background: transparent;
  border: 1px solid #ef4444;
  border-radius: var(--radius-lg);
  color: #ef4444;
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.retry-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.2);
}

/* ============================================
   Features Section
   ============================================ */
.features-section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-2xl);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ============================================
   Tech Stack Section
   ============================================ */
.tech-section {
  padding: var(--spacing-3xl) 0;
  /* Removed background and border to fix "touching border" issue and match design */
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl); /* Increased padding */
  background: var(--bg-card); /* Glassmorphism background */
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-align: center;
}

.tech-item:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
  transform: translateY(-5px);
}

.tech-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-base);
}

.tech-desc {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-3xl);
}

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

.footer-text {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: var(--primary-light);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

.footer-divider {
  color: var(--text-muted);
  margin: 0 var(--spacing-sm);
}

.copyright {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .header {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav {
    gap: var(--spacing-lg);
  }

  .form-container {
    padding: var(--spacing-lg);
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .gradient-sphere {
    opacity: 0.3;
  }

  .sphere-1 {
    width: 300px;
    height: 300px;
  }

  .sphere-2 {
    width: 200px;
    height: 200px;
  }

  .sphere-3 {
    width: 150px;
    height: 150px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: var(--spacing-md);
  }

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

  .hero-description {
    font-size: var(--font-size-base);
  }

  .form-title {
    font-size: var(--font-size-xl);
  }
}

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

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