/* ========================================
   Grade Calculator Pro – WordPress Plugin
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

.gcp-wrapper {
  font-family: 'DM Sans', sans-serif;
  max-width: 860px;
  margin: 32px auto;
  background: #ffffff;
  border: 2px solid #e8edf5;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.08);
}

/* ── TABS ── */
.gcp-tabs {
  display: flex;
  background: #f4f7fb;
  border-bottom: 2px solid #e8edf5;
  padding: 0;
  gap: 0;
}

.gcp-tab {
  flex: 1;
  padding: 14px 12px;
  background: transparent;
  border: none;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #6b7a99;
  cursor: pointer;
  transition: all 0.2s ease;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
}

.gcp-tab:hover {
  color: #2563eb;
  background: #eaf0fb;
}

.gcp-tab.active {
  color: #2563eb;
  background: #ffffff;
  border-bottom-color: #2563eb;
}

/* ── PANELS ── */
.gcp-panel {
  display: none;
  padding: 28px 28px 20px;
  animation: gcpFadeIn 0.25s ease;
}

.gcp-panel.active {
  display: block;
}

@keyframes gcpFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.gcp-desc {
  color: #6b7a99;
  font-size: 14px;
  margin: 0 0 20px;
  line-height: 1.5;
}

/* ── TABLE ── */
.gcp-table-wrap {
  overflow-x: auto;
  border-radius: 10px;
  border: 1.5px solid #e8edf5;
  margin-bottom: 16px;
}

.gcp-table {
  width: 100%;
  border-collapse: collapse;
}

.gcp-table thead {
  background: #f4f7fb;
}

.gcp-table th {
  padding: 11px 14px;
  font-size: 12px;
  font-weight: 700;
  color: #6b7a99;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: left;
  border-bottom: 1.5px solid #e8edf5;
}

.gcp-table td {
  padding: 8px 10px;
  border-bottom: 1px solid #f1f4f9;
}

.gcp-table tbody tr:last-child td {
  border-bottom: none;
}

.gcp-table tbody tr:hover td {
  background: #fafbff;
}

/* ── INPUTS ── */
.gcp-input {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid #e0e7f0;
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  color: #1e293b;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

.gcp-input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.gcp-input::placeholder {
  color: #b0bdd4;
}

/* ── DELETE BTN ── */
.gcp-del-btn {
  background: transparent;
  border: 1.5px solid #fca5a5;
  color: #ef4444;
  border-radius: 6px;
  width: 30px;
  height: 30px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gcp-del-btn:hover {
  background: #fef2f2;
  border-color: #ef4444;
}

/* ── FORM GRID (Final Exam tab) ── */
.gcp-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.gcp-form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #374151;
  margin-bottom: 7px;
}

/* ── ACTIONS ── */
.gcp-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.gcp-btn {
  padding: 10px 20px;
  border-radius: 9px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s ease;
}

.gcp-btn-primary {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
}

.gcp-btn-primary:hover {
  background: #1d4ed8;
  border-color: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

.gcp-btn-outline {
  background: #fff;
  color: #2563eb;
  border-color: #2563eb;
}

.gcp-btn-outline:hover {
  background: #eff6ff;
}

.gcp-btn-danger {
  background: #fff;
  color: #ef4444;
  border-color: #fca5a5;
}

.gcp-btn-danger:hover {
  background: #fef2f2;
  border-color: #ef4444;
}

/* ── RESULT BOX ── */
.gcp-result {
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
  border: 2px solid #93c5fd;
  border-radius: 12px;
  padding: 24px;
  margin-top: 4px;
  animation: gcpFadeIn 0.3s ease;
}

.gcp-result.error {
  background: #fef2f2;
  border-color: #fca5a5;
}

.gcp-result-grade {
  font-family: 'Space Mono', monospace;
  font-size: 52px;
  font-weight: 700;
  color: #1e40af;
  line-height: 1;
  margin-bottom: 4px;
}

.gcp-result-letter {
  display: inline-block;
  background: #2563eb;
  color: #fff;
  font-family: 'Space Mono', monospace;
  font-size: 22px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 8px;
  margin-bottom: 14px;
}

.gcp-result-letter.grade-a { background: #16a34a; }
.gcp-result-letter.grade-b { background: #2563eb; }
.gcp-result-letter.grade-c { background: #d97706; }
.gcp-result-letter.grade-d { background: #ea580c; }
.gcp-result-letter.grade-f { background: #dc2626; }

.gcp-result-details {
  font-size: 13px;
  color: #4b5563;
  line-height: 1.7;
  border-top: 1px solid #bfdbfe;
  margin-top: 14px;
  padding-top: 14px;
}

.gcp-result-details table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.gcp-result-details th {
  text-align: left;
  font-weight: 600;
  color: #374151;
  padding: 4px 8px;
  background: rgba(255,255,255,0.6);
  border-radius: 4px;
}

.gcp-result-details td {
  padding: 4px 8px;
  color: #1e293b;
}

.gcp-result-details tr:nth-child(even) td {
  background: rgba(255,255,255,0.4);
}

.gcp-error-msg {
  color: #dc2626;
  font-weight: 600;
  font-size: 14px;
}

/* ── GRADE SCALE ── */
.gcp-scale-section {
  padding: 24px 28px 28px;
  border-top: 2px solid #f1f4f9;
  background: #fafbff;
}

.gcp-scale-title {
  font-size: 15px;
  font-weight: 700;
  color: #1e293b;
  margin: 0 0 16px;
}

.gcp-scale-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}

.gcp-scale-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 8px;
  border-radius: 10px;
  border: 1.5px solid #e8edf5;
  background: #fff;
  font-size: 12px;
  gap: 2px;
}

.gcp-scale-row.header {
  background: #f4f7fb;
  font-weight: 700;
  color: #6b7a99;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.gcp-scale-row span:first-child {
  font-family: 'Space Mono', monospace;
  font-size: 15px;
  font-weight: 700;
}

.gcp-scale-row.a-plus span:first-child,
.gcp-scale-row.a span:first-child { color: #16a34a; }
.gcp-scale-row.a-minus span:first-child { color: #15803d; }
.gcp-scale-row.b-plus span:first-child,
.gcp-scale-row.b span:first-child,
.gcp-scale-row.b-minus span:first-child { color: #2563eb; }
.gcp-scale-row.c-plus span:first-child,
.gcp-scale-row.c span:first-child,
.gcp-scale-row.c-minus span:first-child { color: #d97706; }
.gcp-scale-row.d span:first-child { color: #ea580c; }
.gcp-scale-row.f span:first-child { color: #dc2626; }

.gcp-scale-row span:nth-child(2) {
  color: #374151;
  font-weight: 500;
  font-size: 11px;
}

.gcp-scale-row span:nth-child(3) {
  color: #9ca3af;
  font-size: 11px;
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .gcp-panel { padding: 20px 16px 16px; }
  .gcp-tab { font-size: 12px; padding: 12px 6px; }
  .gcp-result-grade { font-size: 38px; }
  .gcp-scale-grid { grid-template-columns: repeat(3, 1fr); }
  .gcp-scale-section { padding: 20px 16px 24px; }
  .gcp-actions { gap: 8px; }
  .gcp-btn { padding: 9px 14px; font-size: 13px; }
}