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

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #8b5cf6;
  --success: #10b981;
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #f9fafb;
  --bg-card: #ffffff;
  --border: #e5e7eb;
  --border-focus: #6366f1;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 2rem 1rem;
  color: var(--text);
  line-height: 1.6;
}

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

header {
  text-align: center;
  color: white;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
  font-weight: 300;
}

.card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 20px 60px var(--shadow-lg);
  margin-bottom: 1.5rem;
  animation: slideUp 0.5s ease-out;
}

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

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

.form-group {
  margin-bottom: 1.5rem;
}

.form-group:last-of-type {
  margin-bottom: 0;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-size: 0.95rem;
}

.file-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 2rem;
  border: 2px dashed var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.file-label:hover {
  border-color: var(--primary);
  background: #f3f4f6;
}

.file-label:has(input:focus) {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.file-label svg {
  margin-bottom: 0.75rem;
  color: var(--primary);
  stroke-width: 2.5;
  pointer-events: none;
}

.file-label span {
  font-weight: 600;
  color: var(--text);
  pointer-events: none;
}

.file-label input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  top: 0;
  left: 0;
  z-index: 1;
  pointer-events: auto;
}

.file-name {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 500;
  display: none;
}

input[type="text"],
select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.2s ease;
  background: var(--bg-card);
  color: var(--text);
  font-family: inherit;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input[type="text"]::placeholder {
  color: var(--text-light);
}

select {
  cursor: pointer;
  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='%236366f1' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  appearance: none;
}

.btn-primary {
  width: 100%;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
  position: relative;
  overflow: hidden;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

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

.btn-text,
.btn-loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  pointer-events: none;
}

.btn-loading.hidden {
  display: none;
}

.btn-text.hidden {
  display: none;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.info-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 10px 30px var(--shadow);
}

.info-card h3 {
  margin-bottom: 1rem;
  color: var(--text);
  font-size: 1.1rem;
}

.info-card ul {
  list-style: none;
  padding: 0;
}

.info-card li {
  padding: 0.5rem 0;
  color: var(--text-light);
  padding-left: 1.5rem;
  position: relative;
}

.info-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: bold;
}

.hidden {
  display: none !important;
}

/* Payment Modal Styles - Using native dialog element */
.payment-dialog {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  border: none;
  border-radius: 20px;
  padding: 0;
  width: 90%;
  min-width: 400px;
  max-width: 550px;
  height: fit-content;
  max-height: 90vh;
  background: transparent;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
  transform: none;
}

.payment-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  animation: fadeIn 0.3s ease-out;
}

.payment-dialog[open] {
  display: block;
  animation: modalSlideUp 0.4s ease-out;
}

.payment-dialog:not([open]) {
  display: none;
}

.dialog-content {
  position: relative;
  background: var(--bg-card);
  border-radius: 20px;
  padding: 2rem 2.5rem 2.5rem 2.5rem;
  max-height: 90vh;
  overflow-y: auto;
  text-align: center;
  margin: 0;
  width: 100%;
  box-sizing: border-box;
  min-width: 0;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-light);
  cursor: pointer;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
  line-height: 1;
  padding: 0;
  z-index: 1;
}

.modal-close:hover {
  background: var(--bg);
  color: var(--text);
  transform: rotate(90deg);
}

#payment-modal-body {
  margin: 0;
  padding: 0;
  width: 100%;
  box-sizing: border-box;
}

#payment-modal-body h3 {
  font-size: 1.75rem;
  margin: 0 0 1rem 0;
  padding: 0;
  color: var(--text);
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#payment-modal-body p {
  color: var(--text-light);
  margin: 0 0 0.75rem 0;
  padding: 0;
  line-height: 1.7;
  font-size: 1.05rem;
  max-width: 100%;
  word-wrap: break-word;
}

#payment-modal-body p:last-of-type {
  margin-bottom: 1.5rem;
}

#paypal-button-container {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 150px;
  width: 100%;
  box-sizing: border-box;
}

#paypal-button-container>* {
  width: 100%;
  max-width: 100%;
}

.paypal-loading {
  color: var(--text-light);
  font-style: italic;
  padding: 2rem;
}

/* Payment Prompt Styles (for inline messages) */
.payment-prompt {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 20px 60px var(--shadow-lg);
  margin-bottom: 1.5rem;
  animation: slideUp 0.5s ease-out;
  text-align: center;
}

.payment-prompt h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.payment-prompt p {
  color: var(--text-light);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

.payment-prompt p:last-of-type {
  margin-bottom: 1.5rem;
}

.btn-payment {
  padding: 0.875rem 2rem;
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-payment:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.btn-payment:active:not(:disabled) {
  transform: translateY(0);
}

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

/* Payment Success Message */
.payment-success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  text-align: center;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
  animation: slideUp 0.5s ease-out;
  font-size: 1.05rem;
}

@media (max-width: 640px) {
  header h1 {
    font-size: 2rem;
  }

  .card {
    padding: 1.5rem;
  }

  .file-label {
    padding: 2rem 1.5rem;
  }

  .payment-dialog {
    width: 95%;
    min-width: 320px;
    max-width: 95vw;
  }

  .dialog-content {
    padding: 1.75rem 1.5rem 2rem 1.5rem;
  }

  .modal-close {
    top: 1rem;
    right: 1rem;
    font-size: 1.75rem;
    width: 2rem;
    height: 2rem;
  }

  #payment-modal-body h3 {
    font-size: 1.5rem;
  }

  #payment-modal-body p {
    font-size: 1rem;
  }
}