/* Variables for consistent colors and easy theming */
:root {
  --primary: #5681d0;
  --primary-dark: #4070c0;
  --bg-dark: #1a1a3d;
  --bg-main: #212750;
  --text-light: #f8f8f2;
  --accent: #ff6b6b;
  --accent-light: #c8a2c8;
  --shadow: rgba(0, 0, 0, 0.2);
  --card-bg: rgba(255, 255, 255, 0.05);
  --error: #ff4444;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--bg-main), var(--bg-dark));
  color: var(--text-light);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  position: relative;
  overflow-x: hidden;
}

/* Animated particles background */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
}

.particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background-color: var(--primary);
  border-radius: 50%;
  opacity: 0.3;
}

/* Generate different sized and positioned particles */
.particle:nth-child(1) {
  top: 20%;
  left: 10%;
  animation: float 30s linear infinite;
}

.particle:nth-child(2) {
  top: 70%;
  left: 30%;
  animation: float 25s linear infinite;
  animation-delay: 2s;
}

.particle:nth-child(3) {
  top: 40%;
  left: 50%;
  animation: float 35s linear infinite;
  animation-delay: 5s;
}

.particle:nth-child(4) {
  top: 60%;
  left: 70%;
  animation: float 22s linear infinite;
  animation-delay: 1s;
}

.particle:nth-child(5) {
  top: 30%;
  left: 85%;
  animation: float 28s linear infinite;
  animation-delay: 3s;
}

.particle:nth-child(6) {
  top: 80%;
  left: 15%;
  animation: float 32s linear infinite;
  animation-delay: 4s;
}

/* Floating animation for particles */
@keyframes float {
  0% {
    transform: translate(0, 0);
  }

  25% {
    transform: translate(50px, 50px);
  }

  50% {
    transform: translate(100px, 0);
  }

  75% {
    transform: translate(50px, -50px);
  }

  100% {
    transform: translate(0, 0);
  }
}

/* Card backdrop glow */
.backdrop {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  opacity: 0.15;
  filter: blur(40px);
  z-index: -1;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: pulse 8s ease infinite alternate;
}

@keyframes pulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.15;
  }

  50% {
    transform: translate(-50%, -50%) scale(1.2);
    opacity: 0.2;
  }

  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.15;
  }
}

/* Signup container */
.signup-container {
  background-color: var(--bg-dark);
  border-radius: 20px;
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.signup-header {
  text-align: center;
  margin-bottom: 30px;
  font-size: 2rem;
  font-weight: 600;
  background: linear-gradient(to right, var(--primary), var(--accent-light));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--primary);
  animation: fadeIn 0.6s ease;
}

/* Logo */
.app-logo {
  text-align: center;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg,
      var(--primary) 0%,
      var(--primary-dark) 100%);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px var(--shadow);
}

.logo-icon::before {
  content: "";
  position: absolute;
  width: 8px;
  height: 12px;
  top: 6px;
  left: 6px;
  background-color: var(--text-light);
  border-radius: 1px;
  box-shadow: 0 2px 0 var(--text-light), 0 4px 0 var(--text-light);
}

.logo-icon::after {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  top: 14px;
  right: 8px;
  border-left: 4px solid var(--accent);
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
}

.logo-icon {
  background: linear-gradient(135deg,
      var(--primary) 0%,
      var(--primary-dark) 100%);
}

.logo-icon::before {
  box-shadow: 6px 0 0 var(--text-light), 0 8px 0 rgba(248, 248, 242, 0.7),
    6px 8px 0 rgba(248, 248, 242, 0.7);
}

.logo:hover .logo-icon::after {
  animation: shareMove 0.6s ease-in-out;
}

@keyframes shareMove {

  0%,
  100% {
    transform: translateX(0);
  }

  50% {
    transform: translateX(3px);
  }
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-light);
  margin-left: 5px;
}

/* Input groups */
.input-group {
  margin-bottom: 24px;
  position: relative;
  animation: fadeIn 0.8s ease;
}

.input-group:nth-child(2) {
  animation-delay: 0.1s;
}

.input-group:nth-child(3) {
  animation-delay: 0.2s;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.95rem;
}

.input-group input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--primary);
  background-color: rgba(33, 39, 80, 0.5);
  color: var(--text-light);
  border-radius: 12px;
  box-sizing: border-box;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(86, 129, 208, 0.2);
}

/* Active input state */
.input-group.active input {
  background-color: rgba(33, 39, 80, 0.5);
  border-color: var(--primary);
}

.input-group input::placeholder {
  color: rgba(248, 248, 242, 0.4);
}

.input-group input.valid-email {
  border-color: var(--success);
}

.input-group input.invalid-email {
  border-color: var(--error);
}

/* Password field with toggle button */
.input-group {
  position: relative;
}

.toggle-password {
  position: absolute;
  right: 16px;
  top: 45px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-light);
  opacity: 0.7;
  transition: opacity 0.3s ease;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.toggle-password:hover {
  opacity: 1;
}

.eye-icon {
  width: 22px;
  height: 22px;
}

.toggle-password .eye-icon path {
  fill: var(--primary);
}

.input-group:focus-within .toggle-password .eye-icon path,
.input-group input:not(:placeholder-shown)+.toggle-password .eye-icon path {
  fill: var(--bg-dark);
}

.eye-closed {
  display: none;
}

.password-visible .eye-open {
  display: none;
}

.password-visible .eye-closed {
  display: block;
}

/* Email validation feedback */
.email-validation-feedback {
  margin-top: 10px;
  padding: 14px;
  background-color: rgba(74, 107, 255, 0.1);
  border: 1px solid rgba(74, 107, 255, 0.3);
  border-radius: 12px;
  overflow: hidden;
  display: none;
  font-size: 0.9rem;
  animation: fadeIn 0.3s ease;
}

.email-validation-feedback.visible {
  display: block;
}

.validation-item {
  color: var(--text-light);
  margin: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color 0.3s ease;
}

.validation-item:before {
  content: "✗";
  color: var(--error);
  font-size: 1.1em;
}

.validation-item.valid {
  color: var(--success);
}

.validation-item.valid:before {
  content: "✓";
  color: var(--success);
}

/* Password requirements */
.password-requirements {
  margin-top: 10px;
  background-color: rgba(74, 107, 255, 0.1);
  padding: 14px;
  border: 1px solid rgba(74, 107, 255, 0.3);
  border-radius: 12px;
  font-size: 0.9rem;
  display: none;
  animation: fadeIn 0.3s ease;
}

.password-requirements.show-validation {
  display: block;
}

.requirements-list {
  list-style: none;
  padding-left: 0;
  margin: 8px 0 0 0;
}

.requirements-list li {
  margin: 8px 0;
  transition: color 0.3s ease;
  padding-left: 24px;
  position: relative;
}

.requirements-list li:before {
  content: "✗";
  position: absolute;
  left: 0;
  color: var(--error);
}

.requirement-met {
  color: var(--success);
}

.requirement-met:before {
  content: "✓" !important;
  color: var(--success) !important;
}

/* Button styles */
.signup-button {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(74, 107, 255, 0.4);
  animation: fadeIn 0.8s ease 0.3s both;
}

.signup-button::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: all 0.5s ease;
}

.signup-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(74, 107, 255, 0.5);
}

.signup-button:hover::before {
  left: 100%;
}

.signup-button:active {
  transform: translateY(1px);
}

/* Login section */
.login-section {
  text-align: center;
  margin-top: 30px;
  animation: fadeIn 0.8s ease 0.4s both;
  font-size: 0.95rem;
}

.login-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  margin-left: 6px;
  transition: all 0.3s ease;
}

.login-link:hover {
  color: var(--accent-light);
  text-decoration: underline;
}

/* Toast notification */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background-color: var(--error);
  color: white;
  padding: 16px 24px;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
  display: none;
  z-index: 1000;
  animation: slideIn 0.5s, fadeOut 0.5s 2.5s;
  font-weight: 500;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

/* Responsive adjustments */
@media (max-width: 480px) {
  .signup-container {
    padding: 30px 20px;
  }

  .signup-header {
    font-size: 1.7rem;
  }

  .toast {
    left: 20px;
    right: 20px;
    text-align: center;
  }
}