:root {
  --primary: #6c5ce7;
  --primary-light: #a29bfe;
  --primary-dark: #5649c0;
  --secondary: #00cec9;
  --text: #2d3436;
  --text-light: #636e72;
  --bg: #f5f6fa;
  --card-bg: #ffffff;
  --shadow: 0 10px 20px rgba(0,0,0,0.1);
  --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  
  --notification-success: #00b894;
  --notification-info: #0984e3;
  --notification-warning: #FF8C00;
  --notification-error: #d63031;
  --notification-default: var(--primary);
}

[data-theme="dark"] {
  --primary: #a29bfe;
  --primary-light: #6c5ce7;
  --primary-dark: #5649c0;
  --secondary: #00cec9;
  --text: #f5f6fa;
  --text-light: #dfe6e9;
  --bg: #2d3436;
  --card-bg: #1e272e;
  --shadow: 0 10px 20px rgba(0,0,0,0.3);
  
  --notification-success: #55efc4;
  --notification-info: #74b9ff;
  --notification-warning: #FFA500;
  --notification-error: #ff7675;
  --notification-default: var(--primary);
}

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

body {
  font-family: 'Montserrat', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: var(--transition);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  padding: 20px 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 100;
  background-color: rgba(0,0,0,0);
  transition: var(--transition);
  backdrop-filter: blur(5px);
}

header.scrolled {
  background-color: var(--card-bg);
  box-shadow: var(--shadow);
  padding: 10px 0;
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo i {
  margin-right: 10px;
  font-size: 1.5rem;
}

.header-social {
  display: flex;
  gap: 10px;
}

.header-social .social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 35px;
  height: 35px;
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 50%;
  text-decoration: none;
  transition: var(--transition);
  font-size: 1rem;
}

.header-social .social-link:hover {
  background-color: var(--primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  background-color: transparent;
  color: var(--primary);
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid var(--primary);
  cursor: pointer;
  min-width: 180px;
  text-align: center;
  box-sizing: border-box;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(108, 92, 231, 0.2);
}

.btn:active {
  transform: translateY(1px);
}

.btn.active {
  background-color: var(--primary);
  color: white;
  animation: pulse 0.5s ease;
}

.btn-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  width: 100%;
}

.main-content {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero {
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s ease-out 0.5s forwards;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s ease-out 0.7s forwards;
}

.theme-toggle {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  z-index: 100;
  transition: var(--transition);
}

.theme-toggle:hover {
  transform: scale(1.1);
}

.particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 16px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  z-index: 1000;
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
  max-width: 260px;
  transform: translateY(-20px);
  color: white;
  background-color: var(--notification-default);
  overflow: hidden;
}

.notification.success {
  background-color: var(--notification-success);
}

.notification.info {
  background-color: var(--notification-info);
}

.notification.warning {
  background-color: var(--notification-warning);
  color: var(--text);
}

.notification.error {
  background-color: var(--notification-error);
}

.notification.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.notification-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.notification-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-right: 12px;
}

.notification-close {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 1rem;
  opacity: 0.7;
  transition: opacity 0.2s;
  padding: 0;
  line-height: 1;
  margin-left: 8px;
}

.notification-close:hover {
  opacity: 1;
}

.notification-content {
  font-size: 0.85rem;
  line-height: 1.4;
  margin-bottom: 8px;
}

.notification-progress-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 0 0 8px 8px;
  overflow: hidden;
}

.notification-progress-bar {
  height: 100%;
  width: 100%;
  transform-origin: left;
  animation: progressBar 3s linear forwards;
  background-color: rgba(255, 255, 255, 0.7);
  border-radius: 0 0 8px 8px;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s;
  display: flex;
  justify-content: center;
  align-items: center;
  will-change: opacity;
  pointer-events: none;
}

.modal.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.modal-content {
  background-color: var(--card-bg);
  border-radius: 15px;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 500px;
  padding: 30px;
  position: relative;
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.4s ease, opacity 0.4s ease;
  will-change: transform, opacity;
  margin: 20px;
}

.modal.show .modal-content {
  transform: translateY(0);
  opacity: 1;
}

.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 1.5rem;
  color: var(--text-light);
  cursor: pointer;
  background: none;
  border: none;
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--primary);
}

.modal-title {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--primary);
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-light);
  font-weight: 600;
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid var(--primary-light);
  border-radius: 8px;
  background-color: var(--card-bg);
  color: var(--text);
  font-family: 'Montserrat', sans-serif;
  transition: border-color 0.3s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
}

.submit-btn {
  width: 100%;
  padding: 14px;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.3s, box-shadow 0.3s;
  opacity: 0.7;
}

.submit-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
}

.submit-btn.valid {
  opacity: 1;
  background-color: var(--primary-light);
  box-shadow: 0 4px 12px rgba(108, 92, 231, 0.4);
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error-message {
  color: var(--notification-error);
  font-size: 0.8rem;
  margin-top: 5px;
  display: none;
}

.input-error {
  border-color: var(--notification-error) !important;
}

.char-counter {
  font-size: 0.8rem;
  color: var(--text-light);
  text-align: right;
  margin-top: 5px;
}

.char-counter.warning {
  color: var(--notification-warning);
}

.char-counter.error {
  color: var(--notification-error);
}

.grecaptcha-badge {
  visibility: hidden !important;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { 
    opacity: 0; 
    transform: translateY(30px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes fadeInDown {
  from { 
    opacity: 0; 
    transform: translateY(-30px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes pulse {
  0% { background-color: transparent; color: var(--primary); }
  50% { background-color: var(--primary); color: white; }
  100% { background-color: transparent; color: var(--primary); }
}

@keyframes progressBar {
  0% { transform: scaleX(1); }
  100% { transform: scaleX(0); }
}

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

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .btn {
    min-width: 160px;
    padding: 10px 20px;
  }
  
  .header-social {
    gap: 8px;
  }
  
  .header-social .social-link {
    width: 30px;
    height: 30px;
    font-size: 0.9rem;
  }
  
  .notification {
    top: 15px;
    right: 15px;
    max-width: 250px;
  }
  
  .modal-content {
    max-width: 90%;
    padding: 20px;
  }
  
  .modal-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .btn-group {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    min-width: 140px;
    padding: 8px 15px;
    font-size: 0.9rem;
  }
  
  .header-social {
    gap: 6px;
  }
  
  .header-social .social-link {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }
  
  .notification {
    top: 10px;
    right: 10px;
    max-width: 200px;
    font-size: 0.9rem;
    padding: 10px 20px 10px 15px;
  }
}