.kta {
  --kta-dark: #1e293b;
  --kta-blue: #6ec1e4;
  --kta-bg: #f7f9fb;
  --kta-border: #dde5ec;
  --kta-muted: #64748b;

  max-width: 980px;
  margin: 32px auto;
  padding: 28px;
  border: 1px solid var(--kta-border);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 16px 40px rgba(30, 41, 59, 0.08);
  color: var(--kta-dark);
  font-family: Montserrat, Arial, sans-serif;
}

.kta * {
  box-sizing: border-box;
}

/* ==================================================
   HEADER
   ================================================== */

.kta__header h2 {
  margin: 6px 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.1;
}

.kta__header p {
  margin: 0 0 20px;
  color: var(--kta-muted);
}

.kta__kicker {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #3c91b4;
}

/* ==================================================
   TEXTAREA
   ================================================== */

.kta__textarea {
  width: 100%;
  min-height: 280px;
  padding: 18px;
  border: 1px solid var(--kta-border);
  border-radius: 16px;
  resize: vertical;
  font: inherit;
  line-height: 1.65;
  color: var(--kta-dark);
  background: #fcfdfe;
  outline: none;
}

.kta__textarea:focus {
  border-color: var(--kta-blue);
  box-shadow: 0 0 0 4px rgba(110, 193, 228, 0.18);
}

/* ==================================================
   ACTIONS
   ================================================== */

.kta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.kta__button {
  padding: 10px 15px;
  border: 0;
  border-radius: 11px;
  background: #eaf6fb;
  color: #286b86;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    background-color 0.15s ease,
    opacity 0.15s ease;
}

.kta__button:hover:not(:disabled) {
  transform: translateY(-1px);
  background: #dceff7;
}

.kta__button--primary {
  background: var(--kta-dark);
  color: #fff;
}

.kta__button--primary:hover:not(:disabled) {
  background: #0f172a;
}

.kta__button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.kta__status {
  min-height: 24px;
  margin-top: 8px;
  color: #0f766e;
  font-size: 0.9rem;
  font-weight: 700;
}

/* ==================================================
   PRINCIPAL STATS
   ================================================== */

.kta__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.kta__stat,
.kta__details > div {
  padding: 16px;
  border: 1px solid var(--kta-border);
  border-radius: 14px;
  background: #fff;
}

.kta__stat strong,
.kta__details strong {
  display: block;
  font-size: 1.8rem;
}

.kta__stat span,
.kta__details span {
  color: var(--kta-muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.kta__details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.kta__details strong {
  font-size: 1.25rem;
}

/* ==================================================
   PANELS
   ================================================== */

.kta__panels {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.kta details {
  overflow: hidden;
  border: 1px solid var(--kta-border);
  border-radius: 14px;
}

.kta summary {
  padding: 15px 17px;
  background: var(--kta-bg);
  font-weight: 800;
  cursor: pointer;
}

.kta__panel {
  padding: 17px;
}

/* ==================================================
   FREQUENCY AND KEYWORDS
   ================================================== */

.kta__check {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}

.kta__keyword {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: end;
  margin-bottom: 14px;
}

.kta__keyword label span {
  display: block;
  margin-bottom: 6px;
  color: var(--kta-muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.kta__keyword input,
.kta select,
.kta input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--kta-border);
  border-radius: 10px;
  background: #fff;
  color: var(--kta-dark);
  font: inherit;
}

.kta__keyword input:focus,
.kta select:focus,
.kta input[type="number"]:focus {
  border-color: var(--kta-blue);
  outline: none;
  box-shadow: 0 0 0 3px rgba(110, 193, 228, 0.16);
}

.kta__keyword > div {
  min-width: 150px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--kta-bg);
}

.kta__keyword > div span {
  display: block;
  color: var(--kta-muted);
  font-size: 0.78rem;
}

.kta__keyword > div strong {
  font-size: 1.3rem;
}

.kta__table-wrap {
  overflow: auto;
}

.kta__table {
  width: 100%;
  border-collapse: collapse;
}

.kta__table th,
.kta__table td {
  padding: 10px;
  border-bottom: 1px solid var(--kta-border);
  text-align: left;
}

.kta__table th {
  color: #475569;
  font-size: 0.84rem;
}

.kta__empty-row td {
  padding: 28px 16px;
  background: var(--kta-bg);
  color: var(--kta-muted);
  font-size: 0.92rem;
  text-align: center;
}

/* ==================================================
   READABILITY
   ================================================== */

.kta__readability {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.kta__readability > div {
  padding: 12px;
  border-radius: 10px;
  background: var(--kta-bg);
}

.kta__readability span {
  display: block;
  color: var(--kta-muted);
  font-size: 0.82rem;
}

.kta__readability-score {
  grid-column: 1 / -1;
  border: 1px solid var(--kta-border);
  font-size: 1.15rem;
  font-weight: 800;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease;
}

.kta__readability-score--neutral {
  border-color: var(--kta-border) !important;
  background: var(--kta-bg) !important;
  color: #475569 !important;
}

.kta__readability-score--easy {
  border-color: #86efac !important;
  background: #dcfce7 !important;
  color: #166534 !important;
}

.kta__readability-score--moderate {
  border-color: #fcd34d !important;
  background: #fef3c7 !important;
  color: #92400e !important;
}

.kta__readability-score--difficult {
  border-color: #fca5a5 !important;
  background: #fee2e2 !important;
  color: #991b1b !important;
}

/* ==================================================
   LIMITS
   ================================================== */

.kta__select-label {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 10px;
}

.kta__limit-meter {
  margin-top: 14px;
}

.kta__limit-meter span {
  display: block;
  margin-bottom: 8px;
  font-weight: 800;
}

.kta progress[data-stat="limitProgress"] {
  display: block;
  width: 100%;
  height: 14px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: #e2e8f0;
  appearance: none;
  -webkit-appearance: none;
}

.kta progress[data-stat="limitProgress"]::-webkit-progress-bar {
  border-radius: 999px;
  background: #e2e8f0;
}

.kta progress[data-stat="limitProgress"]::-webkit-progress-value {
  border-radius: 999px;
  transition: background-color 0.2s ease;
}

.kta progress[data-stat="limitProgress"]::-moz-progress-bar {
  border-radius: 999px;
  transition: background-color 0.2s ease;
}

.kta progress.kta__progress--normal {
  accent-color: var(--kta-blue);
}

.kta progress.kta__progress--normal::-webkit-progress-value {
  background: var(--kta-blue) !important;
}

.kta progress.kta__progress--normal::-moz-progress-bar {
  background: var(--kta-blue) !important;
}

.kta progress.kta__progress--warning {
  accent-color: #f59e0b;
}

.kta progress.kta__progress--warning::-webkit-progress-value {
  background: #f59e0b !important;
}

.kta progress.kta__progress--warning::-moz-progress-bar {
  background: #f59e0b !important;
}

.kta progress.kta__progress--exceeded {
  accent-color: #ef4444;
}

.kta progress.kta__progress--exceeded::-webkit-progress-value {
  background: #ef4444 !important;
}

.kta progress.kta__progress--exceeded::-moz-progress-bar {
  background: #ef4444 !important;
}

/* ==================================================
   PRIVACY
   ================================================== */

.kta__privacy {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 4px solid var(--kta-blue);
  background: #f0f8fc;
  color: #475569;
  font-size: 0.88rem;
}

/* ==================================================
   RESPONSIVE
   ================================================== */

@media (max-width: 760px) {
  .kta {
    padding: 20px;
  }

  .kta__stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .kta__details {
    grid-template-columns: repeat(2, 1fr);
  }

  .kta__keyword,
  .kta__select-label {
    grid-template-columns: 1fr;
  }

  .kta__keyword > div {
    min-width: 0;
  }
}

@media (max-width: 430px) {
  .kta__stats,
  .kta__details,
  .kta__readability {
    grid-template-columns: 1fr;
  }

  .kta__button {
    width: 100%;
  }
}