/* CSS Variables for accessibility */
:root {
  --color-text: #1a1a1a;
  --color-background: #ffffff;
  --color-primary: #0056b3;
  --color-primary-hover: #003d80;
  --color-secondary: #6c757d;
  --color-focus: #ff8c00;
  --color-error: #d32f2f;
  --color-success: #2e7d32;
  --color-border: #dee2e6;
  --font-base: 1rem;
  --line-height: 1.6;
  --spacing: 1rem;
  --radius: 4px;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

/* Base styles */
html {
  font-size: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: var(--font-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-background);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: 8px 16px;
  z-index: 100;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

/* Focus states - always visible */
*:focus {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* Container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing);
}

/* Header */
header {
  background-color: var(--color-text);
  color: white;
  padding: var(--spacing);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing);
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0;
}

/* Main */
main {
  flex: 1;
  padding: calc(var(--spacing) * 2) 0;
}

/* Footer */
footer {
  background-color: #f5f5f5;
  padding: var(--spacing);
  text-align: center;
  color: var(--color-secondary);
  font-size: 0.875rem;
}

/* Login page */
.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
}

.login-container {
  background: white;
  padding: calc(var(--spacing) * 2);
  border-radius: var(--radius);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
}

.login-container header {
  background: none;
  color: var(--color-text);
  padding: 0;
  margin-bottom: calc(var(--spacing) * 1.5);
  text-align: center;
}

.login-container h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--color-secondary);
  margin: 0;
}

/* Forms */
.form-group {
  margin-bottom: calc(var(--spacing) * 1.5);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="file"] {
  width: 100%;
  padding: 12px;
  font-size: var(--font-base);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

input:focus {
  border-color: var(--color-primary);
}

input[type="file"] {
  padding: 10px;
}

.help-text {
  font-size: 0.875rem;
  color: var(--color-secondary);
  margin-top: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: var(--font-base);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  min-height: 44px;
  min-width: 44px;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
}

.btn-secondary:hover {
  background-color: #5a6268;
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.login-form .btn {
  width: 100%;
}

/* Alerts */
.alert {
  padding: var(--spacing);
  border-radius: var(--radius);
  margin-bottom: var(--spacing);
}

.alert-error {
  background-color: #ffebee;
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

.alert-success {
  background-color: #e8f5e9;
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.info-text {
  text-align: center;
  color: var(--color-secondary);
  font-size: 0.875rem;
  margin-top: var(--spacing);
}

/* Welcome section */
.welcome-section {
  margin-bottom: calc(var(--spacing) * 2);
  padding-bottom: var(--spacing);
  border-bottom: 2px solid var(--color-border);
}

.welcome-section h2 {
  margin: 0;
}

/* Documents section */
.documents-section {
  margin-bottom: calc(var(--spacing) * 2);
}

.documents-section h3 {
  margin-bottom: var(--spacing);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.document-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.document-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: var(--spacing);
}

.document-info {
  display: flex;
  align-items: center;
  gap: var(--spacing);
}

.document-icon {
  font-size: 1.5rem;
}

.document-date {
  font-size: 0.875rem;
  color: var(--color-secondary);
}

.empty-message {
  color: var(--color-secondary);
  font-style: italic;
}

/* Upload section */
.upload-section {
  background-color: #f8f9fa;
  padding: calc(var(--spacing) * 1.5);
  border-radius: var(--radius);
}

.upload-form .btn {
  margin-top: var(--spacing);
}

/* Responsive */
@media (max-width: 600px) {
  .header-content {
    flex-direction: column;
    text-align: center;
  }

  .document-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .document-item .btn {
    width: 100%;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
  }

  .btn {
    border: 2px solid currentColor;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}