/* ==========================================================
   Medical NER – Stylesheet
   Primary colour:  #00619b
   Font:            Poppins
   ========================================================== */

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #00619b;
  --primary-light: #e5f1f8;
  --primary-dark: #004a76;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg: #f1f5f9;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
  --transition: 0.2s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: "Poppins", sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

/* ---- Header ---- */
.header {
  background: var(--primary);
  color: #fff;
  padding: 2rem 1.5rem 1.6rem;
  text-align: center;
}

.header__brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 0.3rem;
}

.header__icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.header__title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header__subtitle {
  font-size: 0.95rem;
  font-weight: 300;
  opacity: 0.85;
}

/* ---- Main ---- */
.main {
  flex: 1;
  width: 100%;
  max-width: 780px;
  margin: 2rem auto;
  padding: 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ---- Card ---- */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.8rem;
}

.card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--primary);
}

/* ---- Upload Area ---- */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  margin-bottom: 1.2rem;
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
}

.upload-area__icon {
  width: 36px;
  height: 36px;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.upload-area__text {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.upload-area__link {
  color: var(--primary);
  font-weight: 500;
  text-decoration: underline;
  cursor: pointer;
}

.upload-area__hint {
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 500;
  margin-top: 0.4rem;
  min-height: 1.2em;
}

/* ---- Label & Textarea ---- */
.label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.textarea {
  width: 100%;
  font-family: "Poppins", sans-serif;
  font-size: 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  resize: vertical;
  transition: border-color var(--transition);
  line-height: 1.5;
  color: var(--text);
}

.textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 97, 155, 0.12);
}

/* ---- Buttons ---- */
.actions {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.btn {
  font-family: "Poppins", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.6rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: background var(--transition), transform var(--transition);
}

.btn:active {
  transform: scale(0.97);
}

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

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

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

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1.5px solid var(--border);
}

.btn--ghost:hover {
  border-color: var(--text-muted);
}

/* Loader spinner */
.btn__loader {
  width: 16px;
  height: 16px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ---- Annotated Text ---- */
.annotated-text {
  font-size: 0.95rem;
  line-height: 1.9;
  padding: 1rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: #fafbfc;
  margin-bottom: 1.2rem;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Entity highlight colours */
.entity-tag {
  display: inline;
  padding: 0.15em 0.45em;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.88rem;
  position: relative;
}

.entity-tag__label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  vertical-align: super;
  margin-left: 0.2em;
  opacity: 0.85;
}

/* Disease */
.entity-tag--disease {
  background: #fee2e2;
  color: #991b1b;
}

/* Chemical / Drug */
.entity-tag--chemical {
  background: #dbeafe;
  color: #1e40af;
}

/* Gene / Protein */
.entity-tag--gene,
.entity-tag--protein {
  background: #dcfce7;
  color: #166534;
}

/* Species */
.entity-tag--species {
  background: #fef9c3;
  color: #854d0e;
}

/* Mutation */
.entity-tag--mutation {
  background: #f3e8ff;
  color: #6b21a8;
}

/* Cell line / Cell type */
.entity-tag--cell_line,
.entity-tag--cell_type,
.entity-tag--cell {
  background: #ffe4e6;
  color: #9f1239;
}

/* DNA / RNA */
.entity-tag--dna,
.entity-tag--rna {
  background: #e0f2fe;
  color: #0c4a6e;
}

/* Fallback */
.entity-tag--other {
  background: #f1f5f9;
  color: #334155;
}

/* ---- Entity Summary ---- */
.entity-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.entity-badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.entity-badge__count {
  background: rgba(0, 0, 0, 0.1);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
}

/* ---- Info Banner ---- */
.info-banner {
  background: var(--primary-light);
  border: 1.5px solid #b3d4ea;
  border-radius: 8px;
  padding: 0.7rem 1.2rem;
  color: var(--primary-dark);
  font-size: 0.82rem;
  line-height: 1.5;
}

/* ---- Error Banner ---- */
.error-banner {
  background: #fef2f2;
  border: 1.5px solid #fecaca;
  border-radius: 8px;
  padding: 0.8rem 1.2rem;
  color: #991b1b;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.error-banner[hidden] {
  display: none;
}

.error-banner__close {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: #991b1b;
  padding: 0 0.3rem;
}

/* ---- Footer ---- */
.footer {
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 600px) {
  .header {
    padding: 1.4rem 1rem 1.2rem;
  }

  .header__title {
    font-size: 1.3rem;
  }

  .card {
    padding: 1.2rem;
  }

  .actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}