/* ── App shell ─────────────────────────────────────────────── */

.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 16px 32px;
  max-width: 1040px;
  margin: 0 auto;
}

/* ── Back link ─────────────────────────────────────────────── */

.back-link {
  position: fixed;
  top: 14px;
  left: 14px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: rgba(13, 21, 32, 0.92);
  color: var(--text-2);
  text-decoration: none;
  transition: border-color 120ms ease, color 120ms ease;
  z-index: 30;
  backdrop-filter: blur(6px);
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--accent);
  border-color: var(--line-strong);
  outline: none;
}

.back-link svg {
  width: 16px;
  height: 16px;
}

/* ── Header ────────────────────────────────────────────────── */

.app-header {
  display: grid;
  grid-template-columns: 1fr minmax(200px, 260px);
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--panel);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  padding: 6px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--bg-0);
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-text {
  min-width: 0;
}

.brand-subtitle {
  margin: 0;
  font-family: "Kutup Mono", "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
}

.brand-title {
  margin: 3px 0 0;
  font-size: clamp(20px, 1.8vw, 28px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-0);
}

/* ── Dataset control ───────────────────────────────────────── */

.dataset-control {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.dataset-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-family: "Kutup Mono", "IBM Plex Mono", monospace;
  color: var(--text-2);
}

.dataset-select {
  min-height: 40px;
  width: 100%;
  padding: 8px 36px 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background-color: var(--bg-0);
  color: var(--text-0);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='11' viewBox='0 0 12 12'%3E%3Cpath fill='%236e8da6' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 11px center;
  font-size: 13px;
  transition: border-color 120ms ease;
}

.dataset-select:hover,
.dataset-select:focus {
  border-color: var(--accent);
  outline: none;
}

.dataset-select.is-auto-mode {
  border-color: var(--accent);
  color: #d9ebff;
}

.dataset-select option {
  background: var(--bg-1);
  color: var(--text-0);
}

/* ── Query form ────────────────────────────────────────────── */

.query-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  padding: 8px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color 160ms ease;
}

.query-form:focus-within {
  border-color: var(--line-strong);
}

.query-input {
  min-height: 46px;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--bg-0);
  color: var(--text-0);
  font-size: clamp(14px, 1.1vw, 17px);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.query-input::placeholder {
  color: var(--text-2);
}

.query-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.query-button {
  display: grid;
  place-items: center;
  min-height: 46px;
  min-width: 46px;
  padding: 0 14px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(79, 168, 232, 0.40);
  background: var(--accent-dim);
  color: #c8e8ff;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease;
}

.query-button:hover,
.query-button:focus-visible {
  border-color: rgba(79, 168, 232, 0.70);
  background: rgba(79, 168, 232, 0.24);
  outline: none;
}

.query-button-icon {
  width: 18px;
  height: 18px;
}

/* ── Search mode bar ───────────────────────────────────────── */

.search-mode-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 6px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--panel-soft);
}

.mode-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mode-active-label {
  font-family: "Kutup Mono", "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--accent);
  user-select: none;
}

/* ── Gear button & dropdown ────────────────────────────────── */

.mode-gear-wrap {
  position: relative;
}

.mode-gear-btn {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: border-color 120ms ease, color 120ms ease, transform 200ms ease;
}

.mode-gear-btn:hover,
.mode-gear-btn:focus-visible {
  border-color: var(--line-strong);
  color: var(--text-1);
  outline: none;
}

.mode-gear-btn[aria-expanded="true"] {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(60deg);
}

.gear-icon {
  width: 14px;
  height: 14px;
}

.mode-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 200px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: var(--panel-raise);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  z-index: 50;
  overflow: hidden;
  animation: dropdownIn 140ms ease;
}

@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.mode-option {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  padding: 10px 13px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background 100ms ease;
}

.mode-option:last-child {
  border-bottom: 0;
}

.mode-option:hover,
.mode-option:focus-visible {
  background: var(--accent-dim);
  outline: none;
}

.mode-option.is-active .mode-option-title {
  color: var(--accent);
}

.mode-option-title {
  font-family: "Kutup Mono", "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--text-1);
}

.mode-option-hint {
  font-size: 11px;
  color: var(--text-2);
  line-height: 1.4;
}

/* ── Mode metadata ─────────────────────────────────────────── */

.mode-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.04em;
}

.mode-meta-sep {
  opacity: 0.4;
}

#lang-indicator[data-lang="TR"] {
  color: var(--warn);
}

/* ── Chat section ──────────────────────────────────────────── */

.chat-section {
  display: flex;
  justify-content: center;
}

/* ── Version label ─────────────────────────────────────────── */

.version-label {
  position: fixed;
  right: 10px;
  bottom: 10px;
  padding: 3px 7px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: rgba(13, 21, 32, 0.90);
  color: var(--text-2);
  font-size: 10px;
  letter-spacing: 0.05em;
  z-index: 10;
}

/* ── Responsive ────────────────────────────────────────────── */

@media (max-width: 900px) {
  .app-header {
    grid-template-columns: 1fr;
  }

  .query-form {
    grid-template-columns: 1fr auto;
  }
}

@media (max-width: 720px) {
  .app {
    padding: 14px 10px 28px;
    gap: 8px;
  }

  .back-link {
    width: 32px;
    height: 32px;
    top: 10px;
    left: 10px;
  }

  .mode-meta {
    font-size: 10px;
    gap: 4px;
  }
}

@media (max-width: 480px) {
  .search-mode-bar {
    flex-wrap: wrap;
    gap: 8px;
  }
}