/* ===== RESET & BASE STYLES ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-attachment: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
  position: relative;
  overflow-x: hidden;
}

/* Animated background particles */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ===== CONTAINER ===== */
.container {
  position: relative;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 24px;
  padding: 40px;
  max-width: 650px;
  width: 100%;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset;
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1;
}

/* ===== CLOSE BUTTON ===== */
.close-button {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 20px;
  font-weight: bold;
  color: #667eea;
  cursor: pointer;
  z-index: 100;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.close-button:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: rotate(90deg) scale(1.1);
  color: #764ba2;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-20px);
  }
}

/* ===== HEADING ===== */
h2 {
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 30px;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* ===== FORM GROUPS ===== */
.form-group {
  margin-bottom: 24px;
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  animation-fill-mode: both;
}

.form-group:nth-child(1) { animation-delay: 0.05s; }
.form-group:nth-child(2) { animation-delay: 0.1s; }
.form-group:nth-child(3) { animation-delay: 0.15s; }
.form-group:nth-child(4) { animation-delay: 0.2s; }
.form-group:nth-child(5) { animation-delay: 0.25s; }
.form-group:nth-child(6) { animation-delay: 0.3s; }
.form-group:nth-child(7) { animation-delay: 0.35s; }
.form-group:nth-child(8) { animation-delay: 0.4s; }
.form-group:nth-child(9) { animation-delay: 0.45s; }
.form-group:nth-child(10) { animation-delay: 0.5s; }

/* Extra margin for interests dropdown to prevent overlap */
.form-group:has(.dropdown-checkbox) {
  margin-bottom: 280px;
}

/* When dropdown is closed, reduce margin */
.form-group:has(.dropdown-checkbox:not(.open)) {
  margin-bottom: 24px;
  transition: margin-bottom 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* When dropdown is open, add margin */
.form-group:has(.dropdown-checkbox.open) {
  margin-bottom: 280px;
  transition: margin-bottom 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  color: #1e293b;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.2px;
}

.autofill-btn {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
  white-space: nowrap;
  line-height: 1.6;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.autofill-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 15px rgba(16, 185, 129, 0.4);
}

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

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

.autofill-icon {
  display: inline-block;
  width: 14px;
  height: 14px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0 1 18 0z'/%3E%3Ccircle cx='12' cy='10' r='3'/%3E%3C/svg%3E") no-repeat center center;
  background-size: contain;
  flex-shrink: 0;
}

.autofill-icon.spinning {
  animation: autofillSpin 0.8s linear infinite;
}

@keyframes autofillSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== INPUTS ===== */
.form-group input,
.dropdown-checkbox-button {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 15px;
  background: #ffffff;
  color: #1e293b;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
}

.form-group input:hover {
  border-color: #cbd5e1;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
  transform: translateY(-1px);
}

.form-group input::placeholder {
  color: #94a3b8;
}

/* ===== ROW LAYOUT ===== */
.row {
  display: flex;
  gap: 16px;
}

.row input,
.row select {
  flex: 1;
}

/* ===== PHONE NUMBER ROW ===== */
.phone-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
}

.country-code-select {
  flex: 0 0 110px;
  min-width: 110px;
  max-width: 110px;
}

.phone-input {
  flex: 1;
  min-width: 0;
}

/* ===== SELECT DROPDOWN (Country Code) ===== */
.form-group select {
  padding: 14px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 15px;
  background: #ffffff;
  color: #1e293b;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23667eea' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-group select:hover {
  border-color: #cbd5e1;
}

.form-group select:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
  transform: translateY(-1px);
}

.form-group select option {
  padding: 10px;
  font-size: 15px;
}


/* ===== GENDER OPTIONS ===== */
.gender-options {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.gender-options label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  color: #475569;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  font-size: 14px;
}

.gender-options label:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.gender-options input[type="radio"]:checked + label,
.gender-options label:has(input[type="radio"]:checked) {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-color: #667eea;
  color: #ffffff;
}

.gender-options input[type="radio"] {
  accent-color: #667eea;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* ===== DROPDOWN WITH CHECKBOXES ===== */
.dropdown-checkbox {
  position: relative;
  z-index: 100;
}

.dropdown-checkbox-button {
  cursor: pointer;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #ffffff;
  font-weight: 500;
}

.dropdown-checkbox-button:hover {
  border-color: #cbd5e1;
}

.dropdown-checkbox-button::after {
  content: "▾";
  font-size: 18px;
  color: #667eea;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.dropdown-checkbox.open .dropdown-checkbox-button::after {
  transform: rotate(180deg);
}

.dropdown-checkbox.open .dropdown-checkbox-button {
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.dropdown-checkbox-content {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: 100%;
  background: #ffffff;
  border-radius: 12px;
  box-shadow:
    0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  border: 2px solid #e2e8f0;
  padding: 8px;
  max-height: 240px;
  overflow-y: auto;
  animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.dropdown-checkbox-content::-webkit-scrollbar {
  width: 8px;
}

.dropdown-checkbox-content::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 10px;
}

.dropdown-checkbox-content::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 10px;
}

.dropdown-checkbox-content::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

.dropdown-checkbox-content label {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  font-weight: 500;
  font-size: 14px;
  color: #475569;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin: 0;
}

.dropdown-checkbox-content label:hover {
  background: #f8fafc;
}

.dropdown-checkbox-content input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: #667eea;
  cursor: pointer;
  border-radius: 4px;
}

.dropdown-checkbox.open .dropdown-checkbox-content {
  display: block;
}

/* ===== SUBMIT BUTTON ===== */
.submit-button {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  font-size: 16px;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
  letter-spacing: 0.5px;
  margin-top: 8px;
}

.submit-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

.submit-button:active {
  transform: translateY(0);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.submit-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ===== TOAST NOTIFICATIONS ===== */
.form-message {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  max-width: 400px;
  animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-message > div {
  border-radius: 12px;
  padding: 16px 20px;
  font-weight: 500;
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset;
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 300px;
}

.success-message > div {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
}

.success-message > div::before {
  content: "✓";
  font-size: 24px;
  font-weight: bold;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.error-message > div {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
}

.error-message > div::before {
  content: "✗";
  font-size: 24px;
  font-weight: bold;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100px);
  }
}

/* ===== RESPONSIVE DESIGN ===== */

/* Tablets */
@media (max-width: 768px) {
  .container {
    padding: 32px 24px;
    border-radius: 20px;
  }

  h2 {
    font-size: 28px;
    margin-bottom: 24px;
  }

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

  /* Tablet phone row optimization */
  .country-code-select {
    flex: 0 0 100px;
    min-width: 100px;
    max-width: 100px;
    font-size: 14px;
  }
}

/* Mobile Phones */
@media (max-width: 600px) {
  body {
    padding: 16px;
  }

  .container {
    padding: 28px 20px;
    border-radius: 16px;
  }

  h2 {
    font-size: 24px;
    margin-bottom: 20px;
  }

  .close-button {
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    font-size: 18px;
  }

  .row {
    flex-direction: column;
    gap: 0;
  }

  .row input {
    margin-bottom: 16px;
  }

  .row input:last-child {
    margin-bottom: 0;
  }

  /* Professional stacked layout for phone inputs on small screens */
  .phone-row {
    flex-direction: column;
    gap: 12px;
  }

  .country-code-select {
    width: 100%;
    flex: none;
    min-width: auto;
    max-width: none;
    font-size: 14px;
  }

  .phone-input {
    width: 100%;
    flex: none;
    margin-bottom: 0;
  }

  .gender-options {
    gap: 12px;
  }

  .gender-options label {
    padding: 10px 16px;
    font-size: 13px;
  }

  .form-group input,
  .dropdown-checkbox-button {
    padding: 12px 14px;
    font-size: 14px;
  }

  .submit-button {
    padding: 14px;
    font-size: 15px;
  }

  .dropdown-checkbox-content {
    max-height: 200px;
  }
}

/* Small Mobile Phones */
@media (max-width: 400px) {
  .container {
    padding: 24px 16px;
  }

  h2 {
    font-size: 22px;
  }

  .form-group label {
    font-size: 13px;
  }

  .gender-options {
    flex-direction: column;
    gap: 10px;
  }

  .gender-options label {
    width: 100%;
    justify-content: center;
  }
}

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

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}