/**
 * @license
 * SPDX-License-Identifier: Apache-2.0
 */

:root {
  --background-color: #f8f9fa;
  --text-color: #212529;
  --primary-color: #007bff;
  --primary-hover-color: #0056b3;
  --border-color: #dee2e6;
  --card-background: #ffffff;
  --error-color: #dc3545;
  --success-color: #28a745;
  --secondary-color: #6c757d;
  --secondary-hover-color: #5a6268;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center; /* Changed for vertical centering of login form */
  min-height: 100vh;
  padding: 2rem;
}

.container, .login-container {
  width: 100%;
  max-width: 600px;
  background-color: var(--card-background);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  padding: 2.5rem;
  text-align: center;
}

.login-container {
  max-width: 420px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.login-form h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.login-form label {
  text-align: left;
  font-weight: 500;
  margin-bottom: -0.5rem;
}

.login-form input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 1rem;
}

.login-form button {
  margin-top: 1rem;
}

.login-error {
  color: var(--error-color);
  background-color: #f8d7da;
  border: 1px solid #f5c2c7;
  border-radius: 8px;
  padding: 0.8rem;
  text-align: center;
}


header {
  margin-bottom: 2rem;
  position: relative; /* Context for logout button */
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

header p {
  color: #6c757d;
  font-size: 1rem;
}

.logout-button {
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--secondary-color);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.logout-button:hover {
  background-color: var(--secondary-hover-color);
}

main {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
  min-height: 200px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.upload-area.dragover {
  border-color: var(--primary-color);
  background-color: #f0f7ff;
}

#file-input {
  display: none;
}

.upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: #6c757d;
}

.upload-placeholder svg {
  color: #adb5bd;
}

.image-preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: 4px;
  object-fit: contain;
}

button, .email-button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  flex-grow: 1;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

button:hover:not(:disabled), .email-button:hover {
  background-color: var(--primary-hover-color);
}

button:active:not(:disabled), .email-button:active {
    transform: scale(0.98);
}

button:disabled {
  background-color: #a0cfff;
  cursor: not-allowed;
}

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.restart-button {
    background-color: var(--secondary-color);
}

.restart-button:hover:not(:disabled) {
    background-color: var(--secondary-hover-color);
}

.restart-button:disabled {
    background-color: #c8cbcf;
}


.error-message {
  color: var(--error-color);
  background-color: #f8d7da;
  border: 1px solid #f5c2c7;
  border-radius: 8px;
  padding: 0.8rem;
}

.result-area {
  background-color: #f8f9fa;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.result-area h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.result-area h3 {
    font-size: 1.1rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.result-area label {
    font-weight: 500;
}

.result-area input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: var(--font-family);
    margin-bottom: 0.5rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.result-area input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.output-wrapper {
  width: 100%;
}

.result-area pre {
  white-space: pre;
  overflow-x: auto;
  background-color: #e9ecef;
  padding: 1rem;
  border-radius: 6px;
  flex-grow: 1;
}

.result-area code {
  font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  font-size: 0.9rem;
}

.result-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.copy-button {
    background-color: var(--secondary-color);
    font-size: 0.9rem;
    padding: 0.6rem 1rem;
    flex-grow: 0;
    flex-shrink: 0;
}

.copy-button:hover:not(:disabled) {
    background-color: var(--secondary-hover-color);
}

.email-button {
  background-color: var(--success-color);
  font-size: 0.9rem;
  padding: 0.6rem 1rem;
  flex-grow: 0;
  flex-shrink: 0;
}

.email-button:hover {
  background-color: #218838;
}


@media (max-width: 640px) {
  body {
    padding: 1rem;
    align-items: flex-start; /* Revert for main app on small screens */
  }
  .container {
    padding: 1.5rem;
  }
  header h1 {
    font-size: 1.5rem;
  }
  .result-actions {
    flex-direction: column;
  }
  .logout-button {
    position: static;
    margin-top: 1rem;
    width: 100%;
  }
  header {
    text-align: center;
  }
}