:root {
  --color-primary-bg: #fff; /* button color */
  --color-primary-text: #000; /* h3 text color */
  --color-hover-bg: #e0e0e0; /* hover background color */

  --color-border: #f0f0fa; /* box border color */

  --color-outer-form-bg: #f0f0fa; /* outer form background color */

  --color-box-bg: #fff; /* generic box background color */

  --color-word-badge-bg: #f0f0fa; /* highlight word badge background color */
  --color-word-badge-border: #f0f0f0; /* highlight word badge border color */
  --color-word-badge-text: #333; /* highlight word badge text color */

  --shadow-light: 0 2px 5px rgba(0, 0, 0, 0.05); /* light box shadow */
  --shadow-medium: 0 2px 5px rgba(0, 0, 0, 0.05); /* medium box shadow */

  --border-radius-1: 5px; /* standard button radius */
  --border-radius-2: 5px;  /* hero section radius */
  --border-radius-3: 0px;  /* analysis form radius */
  --border-radius-4: 10px; /* analysis form input radius */
  --border-radius-5: 5px;  /* analysis form button radius */
  --border-radius-6: 5px; /* analysis form outer box radius */
  --border-radius-7: 5px; /* download button radius */
  --border-radius-8: 5px; /* top words badge radius */
  --border-radius-9: 20px; /* top words box radius */
  --border-radius-10: 5px; /* outer highlight box radius */
  --border-radius-11: 5px; /* highlight box radius */
}

#spinner {
  text-align: center;
  margin-top: 1em;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 6px solid #f3f3f3;
  border-top: 6px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: auto;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

body {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  box-sizing: border-box;
}

h1 {
  margin-bottom: 0;
}

h3 {
  color: var(--color-primary-text);
}

button {
  cursor: pointer;
  background-color: var(--color-primary-bg);
  color: var(--color-primary-text);
  border: none;
  border-radius: var(--border-radius-1);
  padding: 8px 16px;
  margin-left: 8px;
  font-size: 0.9rem;
}

button:hover {
  background-color: var(--color-hover-bg);
}

.hero {
  width: 100%;
  background: url("../images/grafic11.jpg") no-repeat center center;
  background-size: cover;
  border-radius: var(--border-radius-2);
  box-shadow: var(--shadow-medium);
  margin-bottom: 2rem;
  padding: 20px;
  box-sizing: border-box;
  color: var(--color-primary-text);
  overflow: hidden;
}

.hero-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.hero-buttons {
  display: flex;
  gap: 8px;
}

.hero-header h1 {
  margin: 0;
  font-size: 2rem;
}

.hero p {
  font-size: 1rem;
  margin: 0;
  max-width: 700px;
}

#analysis-form {
  background-color: transparent;
  border: none;
  border-radius: var(--border-radius-3);
  padding: 0;
  margin-bottom: 0;
}

#analysis-form label {
  display: block;
  margin-bottom: 6px;
  font-weight: bold;
}

#analysis-form input[type="number"],
#analysis-form input[type="file"],
#analysis-form select,
#analysis-form textarea {
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--border-radius-4);
  border: 1px solid var(--color-border);
  margin-bottom: 15px;
  box-sizing: border-box;
}

#analysis-form input[type="checkbox"] {
  margin-right: 8px;
  transform: scale(1.2);
}

#analysis-form button[type="submit"] {
  display: inline-block;
  background: var(--color-primary-bg);
  color: var(--color-primary-text);
  padding: 10px 20px;
  border: none;
  border-radius: var(--border-radius-5);
  cursor: pointer;
  margin-top: 10px;
  font-size: 1rem;
}

#analysis-form button[type="submit"]:hover {
  background: var(--color-hover-bg);
}

.outer-form-box {
  background-color: var(--color-outer-form-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-6);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-light);
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.form-box {
  background-color: var(--color-box-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-6);
  padding: 15px;
  margin-bottom: 15px;
  box-shadow: var(--shadow-light);
}

.form-box h4 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.1rem;
  font-weight: bold;
}

#results {
  margin-bottom: 20px;
}

#download-btn {
  display: none;
  margin-top: 20px;
  background-color: var(--color-primary-bg);
  color: var(--color-primary-text);
  padding: 10px 20px;
  border-radius: var(--border-radius-7);
  border: none;
  cursor: pointer;
}

#download-btn:hover {
  background-color: var(--color-hover-bg);
}

.top-words-box {
  background-color: var(--color-outer-form-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-8);
  padding: 15px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-light);
}

.word-badge {
  display: inline-block;
  margin: 6px 8px 6px 0;
  padding: 6px 10px;
  background-color: var(--color-word-badge-bg);
  border: 1px solid var(--color-word-badge-border);
  border-radius: var(--border-radius-9);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-word-badge-text);
}

.outer-highlights-box {
  background-color: var(--color-outer-form-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-10);
  padding: 15px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-light);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-height: 150px;
}

.highlights-container {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-top: 10px;
}

.highlight-box {
  background-color: var(--color-box-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-11);
  padding: 15px;
  margin-bottom: 15px;
  box-shadow: var(--shadow-light);
  flex: 1 1 calc(33.333% - 15px);
}

.highlight-header {
  font-weight: bold;
  margin-bottom: 10px;
}

.highlight-words {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (max-width: 768px) {
  .outer-form-box,
  .outer-highlights-box,
  .top-words-box,
  .highlight-box {
    padding: 15px;
  }

  .form-box {
    padding: 10px;
  }

  #analysis-form input,
  #analysis-form textarea,
  #analysis-form select {
    font-size: 0.95rem;
  }

  #results {
    padding: 0;
  }

  .highlight-box {
    padding: 10px;
    flex: 1 1 calc(50% - 10px);
  }

  .hero {
    padding: 15px;
  }

  .hero-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 1rem;
  }

  .hero-header h1 {
    font-size: 1.6rem;
  }

  .hero p {
    font-size: 0.95rem;
  }
}