/* Token Diff Estimator - Dark Theme */

:root {
  --background: oklch(0.13 0.005 260);
  --foreground: oklch(0.93 0.005 260);
  --card: oklch(0.16 0.005 260);
  --card-foreground: oklch(0.93 0.005 260);
  --border: oklch(0.3 0.005 260);
  --muted: oklch(0.2 0.005 260);
  --muted-foreground: oklch(0.7 0.005 260);
  --secondary: oklch(0.24 0.005 260);
  --primary: oklch(0.65 0.2 145);
  --primary-foreground: oklch(0.13 0.005 260);
  --added: oklch(0.5 0.17 145);
  --added-foreground: oklch(0.88 0.12 145);
  --removed: oklch(0.45 0.17 27);
  --removed-foreground: oklch(0.88 0.14 27);
  --radius: 8px;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--foreground);
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Shell */
.app-shell {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .main-content {
    padding: 24px;
    gap: 16px;
  }
}

/* ===== Panel ===== */
.panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: visible;
}

/* ===== Panel Header ===== */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  min-height: 36px;
}

.panel-title {
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--muted-foreground);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Panel Footer ===== */
.panel-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px;
  border-top: 1px solid var(--border);
}

.panel-footer .tokencount {
  margin-left: auto;
  font-size: 11px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--foreground);
  font-weight: 600;
}

.panel-footer .char-count {
  font-size: 11px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--muted-foreground);
  opacity: 0.7;
}

.model-selector {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 4px 3px 8px;
  border-radius: 6px;
  border: none;
  background: none;
  color: var(--foreground);
  font-size: 13px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}

.model-selector:hover {
  background: var(--secondary);
}

.model-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.model-name {
  font-weight: 600;
  font-size: 12px;
}

.chevron {
  color: var(--muted-foreground);
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity 0.15s;
}

.model-selector:hover .chevron {
  opacity: 1;
}

/* All-models row (show-all mode) */
.all-models-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  align-items: center;
}

.all-models-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--muted-foreground);
  white-space: nowrap;
}

.all-models-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.all-models-item .count {
  font-weight: 600;
  color: var(--foreground);
}

/* Close button for panel B */
.close-panel-btn {
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
  line-height: 1;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.close-panel-btn:hover {
  background: var(--primary);
  color: var(--primary-foreground);
}

/* ===== Model Dropdown ===== */
.model-dropdown {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 4px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  z-index: 100;
  min-width: 320px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.model-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-mono);
  border: none;
  background: none;
  color: var(--muted-foreground);
  width: 100%;
  text-align: left;
  transition: background 0.1s, color 0.1s;
}

.model-option:hover {
  background: var(--secondary);
}

.model-option.active {
  background: var(--secondary);
  color: var(--foreground);
}

.model-option .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.model-option .tokens {
  margin-left: auto;
  color: var(--muted-foreground);
  font-size: 11px;
}

.model-option .delta {
  font-size: 10px;
  margin-left: 4px;
}

.model-option .delta.positive { color: var(--added-foreground); }
.model-option .delta.negative { color: var(--removed-foreground); }

.dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-mono);
  border: none;
  background: none;
  color: var(--muted-foreground);
  width: 100%;
  text-align: left;
  transition: background 0.1s;
}

.dropdown-toggle:hover {
  background: var(--secondary);
}

/* Loading spinner in dropdown */
.model-loading-spinner {
  width: 10px;
  height: 10px;
  border: 2px solid var(--muted-foreground);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

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

.model-status-icon {
  color: var(--muted-foreground);
  font-size: 11px;
  flex-shrink: 0;
}

/* ===== Textarea ===== */
.textarea-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  overflow: hidden;
}

.textarea-wrap textarea {
  flex: 1;
  width: 100%;
  min-height: 0;
  resize: none;
  border: none;
  outline: none;
  padding: 12px;
  background: transparent;
  color: var(--foreground);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  overflow-y: auto;
}

.textarea-wrap textarea::placeholder {
  color: oklch(0.55 0.005 260 / 0.7);
}


/* ===== Compare Toggle ===== */
.compare-toggle {
  display: flex;
  justify-content: center;
  padding: 4px 0;
}

.compare-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px 10px 16px;
  border-radius: 6px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: var(--primary-foreground);
  font-size: 13px;
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.compare-btn:hover {
  background: oklch(0.6 0.2 145);
  border-color: oklch(0.6 0.2 145);
  color: var(--primary-foreground);
}

/* ===== Mobile Tabs ===== */
.mobile-tabs {
  display: none;
}

.mobile-tab {
  padding: 6px 8px;
  background: none;
  border: none;
  border-radius: 6px;
  color: var(--muted-foreground);
  font-size: 12px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.mobile-tab.active {
  background: var(--background);
  color: var(--foreground);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* ===== Diff Summary Strip ===== */
.diff-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.diff-summary-model {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  flex-wrap: wrap;
}

.diff-summary-hero {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.diff-hero-number {
  font-size: 32px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.diff-hero-number.positive { color: var(--added-foreground); }
.diff-hero-number.negative { color: var(--removed-foreground); }
.diff-hero-number.neutral { color: var(--foreground); }

.diff-hero-label {
  font-size: 14px;
  color: var(--muted-foreground);
  font-family: var(--font-mono);
}

.diff-summary-detail {
  font-size: 12px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--muted-foreground);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.diff-summary-detail .detail-a,
.diff-summary-detail .detail-b {
  white-space: nowrap;
}

/* All-models in diff summary */
.diff-summary-all {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  justify-content: center;
  padding-top: 4px;
}

.diff-summary-all .delta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--muted-foreground);
  white-space: nowrap;
}

.diff-summary-all .delta-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.diff-summary-all .delta-item .delta-val {
  font-weight: 600;
}

.diff-summary-all .delta-item .delta-val.positive { color: var(--added-foreground); }
.diff-summary-all .delta-item .delta-val.negative { color: var(--removed-foreground); }

.diff-summary-actions {
  display: flex;
  gap: 8px;
}

/* ===== Share Button ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: var(--primary-foreground);
  font-size: 13px;
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.btn:hover {
  background: oklch(0.6 0.2 145);
  border-color: oklch(0.6 0.2 145);
}

.btn:disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* ===== Diff Card ===== */
.diff-card {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}

.diff-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
}

.diff-card-label {
  font-size: 12px;
  color: var(--muted-foreground);
}

.diff-card-badges {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Outline badges */
.outline-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 500;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.badge-added {
  border-color: var(--added);
  color: var(--added-foreground);
}

.badge-removed {
  border-color: var(--removed);
  color: var(--removed-foreground);
}

.badge-unchanged {
  color: var(--muted-foreground);
}

.badge-a {
  border-color: var(--removed);
  color: var(--removed-foreground);
}

.badge-b {
  border-color: var(--added);
  color: var(--added-foreground);
}

.diff-card-body {
  padding: 12px;
  max-height: 33vh;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  border-top: 1px solid var(--border);
}

.diff-empty {
  text-align: center;
  color: var(--muted-foreground);
  font-size: 14px;
  padding: 12px 0;
}

.diff-span-added {
  background: oklch(0.5 0.17 145 / 0.35);
  color: var(--added-foreground);
  border-radius: 2px;
  padding: 0 2px;
}

.diff-span-removed {
  background: oklch(0.45 0.17 27 / 0.35);
  color: var(--removed-foreground);
  text-decoration: line-through;
  border-radius: 2px;
  padding: 0 2px;
}

.diff-span-unchanged {
  color: var(--muted-foreground);
}

/* ===== Token View Button ===== */
.token-view-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted-foreground);
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.token-view-btn:hover {
  background: var(--secondary);
  color: var(--foreground);
}

.token-view-btn.active {
  background: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
}

/* ===== Token Highlight ===== */
.token-highlight {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-y: auto;
  z-index: 1;
  pointer-events: none;
}

/* Textarea overlay: transparent text, visible caret */
.textarea-wrap textarea.token-overlay-active {
  color: transparent;
  caret-color: var(--foreground);
  z-index: 2;
  position: relative;
  background: transparent;
}

/* Disabled token view button */
.token-view-btn:disabled {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.token-highlight .tok-empty {
  color: var(--muted-foreground);
  font-style: italic;
}

.tok-0, .tok-1, .tok-2, .tok-3, .tok-4, .tok-5 {
  border-radius: 2px;
  padding: 1px 0;
}
.tok-0 { background: oklch(0.35 0.10 240); }
.tok-1 { background: oklch(0.35 0.10 150); }
.tok-2 { background: oklch(0.35 0.10 30);  }
.tok-3 { background: oklch(0.35 0.10 300); }
.tok-4 { background: oklch(0.35 0.10 180); }
.tok-5 { background: oklch(0.35 0.10 60);  }

/* ===== Native Model Select (mobile) ===== */
.model-select-native {
  display: none;
}

@media (max-width: 767px) {
  .model-select-native {
    display: inline-flex;
    appearance: none;
    -webkit-appearance: none;
    background: var(--secondary);
    color: var(--foreground);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 24px 4px 8px;
    font-size: 12px;
    font-family: var(--font-mono);
    font-weight: 600;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
  }

  .diff-summary-model .model-selector,
  .diff-summary-model .model-dropdown {
    display: none !important;
  }
}

/* ===== Footer ===== */
.app-footer {
  border-top: 1px solid var(--border);
  padding: 8px 12px;
  flex-shrink: 0;
}

.app-footer p {
  font-size: 12px;
  color: var(--muted-foreground);
  font-family: var(--font-mono);
  text-align: center;
}

.app-footer a {
  color: var(--muted-foreground);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s;
}

.app-footer a:hover {
  color: var(--foreground);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 13px;
  color: var(--foreground);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  z-index: 200;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s, transform 0.2s;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive: Desktop (side-by-side in compare mode) ===== */
@media (min-width: 768px) {
  .mobile-tabs {
    display: none !important;
  }

  .main-content.compare-mode {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr auto auto;
    gap: 16px;
  }

  .main-content.compare-mode #panel-a {
    grid-column: 1;
    grid-row: 1;
    min-height: 0;
  }

  .main-content.compare-mode #panel-b {
    grid-column: 2;
    grid-row: 1;
    min-height: 0;
  }

  .main-content.compare-mode .compare-toggle {
    display: none !important;
  }

  .main-content.compare-mode .diff-summary {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .main-content.compare-mode .diff-card {
    grid-column: 1 / -1;
    grid-row: 3;
  }
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 767px) {
  .main-content {
    padding: 8px;
    gap: 8px;
  }

  .main-content.compare-mode .mobile-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--muted);
    border-radius: var(--radius);
    padding: 3px;
    order: -1;
  }

  .main-content.compare-mode #panel-a.mobile-hidden {
    display: none;
  }

  .main-content.compare-mode #panel-b.mobile-hidden {
    display: none;
  }

  .diff-hero-number {
    font-size: 24px;
  }

  .diff-summary {
    padding: 12px;
  }

  .textarea-wrap textarea {
    min-height: 0;
  }

  /* Show-all wraps to grid on mobile */
  .all-models-row {
    gap: 2px 8px;
  }
}