/* =========================================================
   MathAI — style.css
   ========================================================= */

/* ── Design Tokens ──────────────────────────────────────── */
:root {
  --bg-primary: #f8f9fc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f3f8;
  --bg-hover: #eef0f5;

  --text-primary: #0f1117;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;

  --accent-h: 224;
  --accent: hsl(var(--accent-h), 82%, 55%);
  --accent-lt: hsl(var(--accent-h), 82%, 95%);
  --accent-hover: hsl(var(--accent-h), 82%, 48%);
  --accent-glow: hsla(var(--accent-h), 82%, 55%, 0.28);

  --border: #e5e7eb;
  --border-focus: hsl(var(--accent-h), 82%, 60%);

  --danger: #ef4444;
  --success: #22c55e;

  --sel-border: #ffffff;
  --sel-mask: rgba(0, 0, 0, 0.52);
  --sel-handle-bg: #ffffff;
  --sel-handle-border: var(--accent);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.07);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.09);
  --shadow-lg: 0 16px 42px rgba(0, 0, 0, 0.13);
  --shadow-modal: 0 24px 64px rgba(0, 0, 0, 0.2);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --tr: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --tr-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  --font: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Menlo", "Consolas", monospace;

  --header-h: 60px;
}

[data-theme="dark"] {
  --bg-primary: #0d0f14;
  --bg-secondary: #161922;
  --bg-tertiary: #1e2130;
  --bg-hover: #252a3a;

  --text-primary: #f0f2f8;
  --text-secondary: #9aa5c0;
  --text-muted: #5a6480;

  --accent: hsl(var(--accent-h), 75%, 62%);
  --accent-lt: hsl(var(--accent-h), 40%, 18%);
  --accent-hover: hsl(var(--accent-h), 75%, 70%);
  --accent-glow: hsla(var(--accent-h), 75%, 62%, 0.32);

  --border: #2a2f42;
  --border-focus: hsl(var(--accent-h), 60%, 55%);

  --sel-border: #ffffff;
  --sel-mask: rgba(0, 0, 0, 0.6);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 42px rgba(0, 0, 0, 0.55);
  --shadow-modal: 0 24px 64px rgba(0, 0, 0, 0.75);
}

/* ── Reset ──────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition:
    background var(--tr-slow),
    color var(--tr-slow);
}

.hidden {
  display: none !important;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  clip: rect(0, 0, 0, 0);
  overflow: hidden;
}

.icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.icon-sm {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* ── Icon Button ────────────────────────────────────────── */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    background var(--tr),
    color var(--tr),
    transform var(--tr);
}
.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: scale(1.06);
}
.icon-btn:active {
  transform: scale(0.94);
}
.danger-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--tr);
  position: relative;
  overflow: hidden;
}
.btn:disabled {
  opacity: 0.42;
  pointer-events: none;
}
.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 18px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-focus);
}
.btn-outline:disabled {
  opacity: 0.38;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--danger);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12.5px;
}

/* ── Header ─────────────────────────────────────────────── */
.header {
  height: var(--header-h);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  transition:
    background var(--tr-slow),
    border-color var(--tr-slow);
}
.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(
    135deg,
    var(--accent),
    hsl(var(--accent-h), 90%, 70%)
  );
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}
.logo-accent {
  color: var(--accent);
}

.header-tagline {
  font-size: 12px;
  color: var(--text-muted);
  padding-left: 14px;
  border-left: 1px solid var(--border);
  letter-spacing: 0.2px;
}

/* ── Main Layout ────────────────────────────────────────── */
.main-layout {
  display: flex;
  height: calc(100vh - var(--header-h));
  margin-top: var(--header-h);
  overflow: hidden;
  position: relative;
}

/* ── Panels ─────────────────────────────────────────────── */
.panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-secondary);
  transition: background var(--tr-slow);
}
.panel-left {
  flex: 0 0 50%;
  width: 50%;
}
.panel-right {
  flex: 1;
}

/* ── Panel Divider ──────────────────────────────────────── */
.panel-divider {
  width: 5px;
  background: var(--border);
  cursor: col-resize;
  flex-shrink: 0;
  transition: background var(--tr);
  user-select: none;
}
.panel-divider:hover {
  background: var(--accent);
}
.panel-divider.dragging {
  background: var(--accent);
}

/* ── Upload Zone ────────────────────────────────────────── */
.upload-zone {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  margin: 20px;
  cursor: pointer;
  transition: all var(--tr-slow);
  background: var(--bg-primary);
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-lt);
}
.upload-zone.drag-over .upload-icon {
  transform: translateY(-6px) scale(1.1);
  color: var(--accent);
}

.upload-content {
  text-align: center;
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.upload-icon-wrap {
  width: 72px;
  height: 72px;
  background: var(--accent-lt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 6px;
}
.upload-icon {
  width: 30px;
  height: 30px;
  color: var(--accent);
  transition: all var(--tr-slow);
}
.upload-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.upload-sub {
  font-size: 13px;
  color: var(--text-muted);
}
.upload-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 140px;
  margin: 4px 0;
}
.upload-divider::before,
.upload-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}
.upload-divider span {
  font-size: 12px;
  color: var(--text-muted);
}
.upload-btn {
  cursor: pointer;
}
.upload-tip {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
  background: var(--bg-tertiary);
  padding: 7px 12px;
  border-radius: 99px;
  border: 1px solid var(--border);
}

/* ── File Viewer ────────────────────────────────────────── */
.file-viewer {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.file-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
  flex-shrink: 0;
}
.file-info {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.file-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.file-type-badge {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: var(--accent-lt);
  color: var(--accent);
  flex-shrink: 0;
}
.file-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
}

.pdf-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.page-info-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}
.page-input {
  width: 40px;
  text-align: center;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  -moz-appearance: textfield;
  appearance: textfield;
  transition: all var(--tr);
  outline: none;
}
.page-input::-webkit-outer-spin-button,
.page-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.page-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

/* ── Viewer Body ────────────────────────────────────────── */
.viewer-body {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 20px;
  background: var(--bg-primary);
}

.viewer-container {
  position: relative;
  display: inline-block;
}

.pdf-canvas,
.image-preview {
  max-width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: block;
  pointer-events: none; /* Selection overlay captures events */
  user-select: none;
  background-color: #ffffff; /* Ensures transparent images are visible in dark mode */
}
.image-preview {
  max-height: calc(100vh - 200px);
  object-fit: contain;
}

/* ── Hint Bar ───────────────────────────────────────────── */
.hint-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-tertiary);
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}
.hint-bar svg {
  color: var(--accent);
  opacity: 0.8;
  flex-shrink: 0;
}

/* ===========================================================
   SELECTION OVERLAY
   =========================================================== */

/* Full-cover transparent div — captures all pointer events */
.sel-overlay {
  position: absolute;
  inset: 0;
  cursor: crosshair;
  z-index: 10;
  overflow: hidden; /* Clip masks */
  touch-action: none;
}

/* Dark masks outside the selection */
.sel-mask {
  position: absolute;
  background: var(--sel-mask);
  pointer-events: none;
  transition: none; /* Must be instant for smooth dragging */
}

/* The selection box */
.sel-box {
  position: absolute;
  border: 2px solid var(--sel-border);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.3),
    0 4px 20px rgba(0, 0, 0, 0.25);
  cursor: move;
  z-index: 20;
  /* Smooth corners but straight edges for crop feel */
  border-radius: 2px;
  touch-action: none;
  transition:
    border-color var(--tr),
    box-shadow var(--tr);
}

.sel-box.dragging {
  border-color: var(--accent);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.3),
    0 0 20px var(--accent-glow);
}

/* Marching ants animation on the selection border */
.sel-box::before {
  content: "";
  position: absolute;
  inset: -2px;
  border: 2px dashed rgba(255, 255, 255, 0.7);
  border-radius: 2px;
  animation: march 0.6s linear infinite;
  pointer-events: none;
}
@keyframes march {
  0% {
    stroke-dashoffset: 0;
  }
  100% {
    stroke-dashoffset: 20;
  }
}

/* 8 resize handles */
.sel-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--sel-handle-bg);
  border: 2px solid var(--accent);
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  z-index: 30;
  transform: translate(-50%, -50%);
  transition:
    transform var(--tr),
    background var(--tr);
}

/* Expanded hit area for touch */
.sel-handle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
}

.sel-handle:active,
.sel-box.dragging .sel-handle {
  transform: translate(-50%, -50%) scale(1.3);
  background: var(--accent);
}

/* Position handles at corners and midpoints */
.sel-nw {
  top: 0;
  left: 0;
  cursor: nw-resize;
}
.sel-n {
  top: 0;
  left: 50%;
  cursor: n-resize;
}
.sel-ne {
  top: 0;
  left: 100%;
  cursor: ne-resize;
}
.sel-e {
  top: 50%;
  left: 100%;
  cursor: e-resize;
}
.sel-se {
  top: 100%;
  left: 100%;
  cursor: se-resize;
}
.sel-s {
  top: 100%;
  left: 50%;
  cursor: s-resize;
}
.sel-sw {
  top: 100%;
  left: 0;
  cursor: sw-resize;
}
.sel-w {
  top: 50%;
  left: 0;
  cursor: w-resize;
}

/* Floating toolbar at bottom of selection */
.sel-toolbar {
  position: absolute;
  bottom: -48px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 5px 8px;
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
  z-index: 40;
  animation: popIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes popIn {
  from {
    opacity: 0;
    transform: translateX(-50%) scale(0.85);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) scale(1);
  }
}

/* When selection is near the bottom, show toolbar above */
.sel-box.toolbar-above .sel-toolbar {
  bottom: auto;
  top: -48px;
}

.btn-solve-float {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 99px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 10px var(--accent-glow);
  transition: all var(--tr);
}

@media (max-width: 480px) {
  .sel-toolbar {
    padding: 4px 6px;
    gap: 4px;
  }
  .btn-solve-float {
    padding: 5px 10px;
    font-size: 12px;
    gap: 4px;
  }
  .btn-solve-float svg {
    width: 16px;
    height: 16px;
  }
}

.btn-solve-float:hover {
  background: var(--accent-hover);
  transform: scale(1.04);
  box-shadow: 0 4px 18px var(--accent-glow);
}
.btn-solve-float:active {
  transform: scale(0.96);
}
.btn-solve-float svg {
  transition: transform var(--tr);
}
.btn-solve-float:hover svg {
  transform: rotate(-15deg) scale(1.1);
}

.sel-clear-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--bg-hover);
  border: none;
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--tr);
}
.sel-clear-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* Dimension label inside selection */
.sel-dimensions {
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 99px;
  letter-spacing: 0.3px;
  pointer-events: none;
  white-space: nowrap;
}

/* ── Settings Modal ─────────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.48);
  backdrop-filter: blur(5px);
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.settings-modal {
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-radius: 0 0 0 var(--radius-xl);
  width: 45vw; /* slightly less than half screen */
  height: 100vh;
  max-height: 100vh;
  box-shadow: var(--shadow-modal);
  animation: slideLeft 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
@keyframes slideLeft {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.settings-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.settings-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
}

/* ── Settings Tabs ─── */
.settings-tabs {
  display: flex;
  gap: 10px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 10px;
}
.settings-tab {
  background: transparent;
  border: none;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 16px;
  cursor: pointer;
  position: relative;
  transition: color var(--tr);
}
.settings-tab:hover {
  color: var(--text-primary);
}
.settings-tab.active {
  color: var(--accent);
}
.settings-tab.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
}
.settings-view {
  display: none;
  flex-direction: column;
  gap: 14px;
}
.settings-view.active {
  display: flex;
}

.settings-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ── Provider Header rows ─── */
.settings-provider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.2px;
  margin-top: 4px;
}
.provider-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Checkbox Grid for Models */
.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 8px;
}
.model-checkbox-label {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 10px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  user-select: none;
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.model-checkbox-label:hover {
  background: var(--bg-hover);
  border-color: var(--text-muted);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}
.model-checkbox-label:has(input[type="checkbox"]:checked),
.model-checkbox-label:has(input[type="radio"]:checked) {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  transform: translateY(0);
}
.model-checkbox-label:active {
  transform: scale(0.97);
}
.model-checkbox-label input[type="checkbox"],
.model-checkbox-label input[type="radio"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

/* Toggle Switch Styles */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border);
  transition: var(--tr);
  border-radius: 20px;
}
.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: var(--tr);
  border-radius: 50%;
}
input:checked + .slider {
  background-color: var(--success);
}
input:checked + .slider:before {
  transform: translateX(16px);
}

.provider-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
  flex-shrink: 0;
}

[data-theme="dark"] .provider-logo {
  filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.1));
}

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

.settings-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.api-key-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.api-key-row .text-input {
  flex: 1;
}

.text-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  outline: none;
  transition:
    border-color var(--tr),
    box-shadow var(--tr),
    background var(--tr-slow);
}
.text-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.text-input::placeholder {
  color: var(--text-muted);
}

.select-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  padding-right: 36px;
}

.settings-hint {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.55;
}
.settings-actions {
  display: flex;
  gap: 10px;
}

.settings-status {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  animation: fadeIn 0.2s ease;
}
.settings-status.success {
  background: rgba(34, 197, 94, 0.14);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}
.settings-status.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* ── Model Carousel Switcher ────────────────────────────── */
.model-carousel-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
  position: relative;
}

.model-carousel {
  display: flex;
  align-items: stretch;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 4px 14px; /* Added horizontal padding since arrows are gone */
  flex: 1;
}
.model-carousel::-webkit-scrollbar {
  display: none;
}

.model-card {
  scroll-snap-align: center;
  flex: 0 0 calc(50% - 6px); /* Show 2 cards on mobile */
  min-width: 140px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
}

.card-icon-wrap {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 10px;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.card-logo {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.card-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.card-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.card-sublabel {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Active State Styles */
.model-card.active {
  background: var(--bg-secondary);
  border-color: var(--accent);
  box-shadow: 0 4px 12px var(--accent-glow);
  transform: translateY(-1px);
}

.model-card.active .card-icon-wrap {
  background: var(--accent);
}

.model-card.active .card-logo {
  filter: brightness(0) invert(1);
}

/* Provider-specific active colors */
.model-card[data-provider="groq"].active {
  border-color: #ff6b35;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.25);
}
.model-card[data-provider="groq"].active .card-icon-wrap {
  background: linear-gradient(135deg, #ff6b35, #ff9a00);
}

.model-card[data-provider="mistral"].active {
  border-color: #7c3aed;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
}
.model-card[data-provider="mistral"].active .card-icon-wrap {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
}

.model-card[data-provider="ollama"].active {
  border-color: var(--text-primary);
}
.model-card[data-provider="ollama"].active .card-icon-wrap {
  background: var(--text-primary);
}

/* ── Toast ──────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--text-primary);
  color: var(--bg-secondary);
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 13.5px;
  font-weight: 500;
  z-index: 999;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Solution Panel ─────────────────────────────────────── */
.solution-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
  gap: 16px;
}

.solution-header-actions {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
}

.solution-body {
  flex: 1;
  overflow-y: auto;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* ── Empty State ────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 40px 24px;
  text-align: center;
  gap: 28px;
}
.empty-steps {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.empty-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.step-num {
  width: 36px;
  height: 36px;
  background: var(--accent-lt);
  color: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
}
.step-desc {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 90px;
  line-height: 1.5;
}
.step-arrow {
  font-size: 18px;
  color: var(--text-muted);
  margin: 0 4px;
  flex-shrink: 0;
}
.empty-sub {
  font-size: 13px;
  color: var(--text-muted);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.error-actions {
  margin-top: auto;
  padding: 20px;
  display: flex;
  justify-content: center;
  animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: sticky;
  bottom: 0;
  background: linear-gradient(to top, var(--bg-secondary) 80%, transparent);
}

#tryAgainBtn {
  padding: 10px 24px;
  border-radius: 99px;
  font-weight: 600;
  letter-spacing: 0.3px;
  background: var(--bg-secondary);
  color: var(--accent);
  border: 2px solid var(--accent);
  box-shadow: var(--shadow-md);
}

#tryAgainBtn:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--accent-glow);
}

#tryAgainBtn:active {
  transform: translateY(0);
}

/* ── Loading ────────────────────────────────────────────── */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 14px;
}
.spinner-ring {
  width: 52px;
  height: 52px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.loading-sub {
  font-size: 13px;
  color: var(--text-muted);
}

.loading-dots {
  display: flex;
  gap: 6px;
}
.loading-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.3;
  animation: pulse 1.2s ease-in-out infinite;
}
.loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}
.loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.3);
  }
}

/* ── Solution Content ───────────────────────────────────── */
.solution-content {
  padding: 24px;
  line-height: 1.85;
  font-size: 15px;
  color: var(--text-primary);
  animation: fadeInUp 0.4s ease;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.solution-content h1,
.solution-content h2,
.solution-content h3,
.solution-content h4,
.solution-content h5,
.solution-content h6 {
  color: var(--text-primary);
  font-weight: 700;
}
.solution-content h1 {
  font-size: 21px;
  margin: 24px 0 12px;
}
.solution-content h2 {
  font-size: 18px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  margin: 28px 0 14px;
}
.solution-content h3 {
  font-size: 16px;
  margin: 24px 0 12px;
  display: block;
}
.solution-content h4,
.solution-content h5,
.solution-content h6 {
  font-size: 15px;
  margin: 18px 0 8px;
}
.solution-content p {
  margin: 12px 0;
  line-height: 1.8;
}
.solution-content ul,
.solution-content ol {
  margin: 12px 0 12px 24px;
}
.solution-content li {
  margin: 6px 0;
}
.solution-content strong {
  font-weight: 700;
  color: var(--text-primary);
}
.solution-content em {
  font-style: italic;
  color: var(--text-secondary);
}

.solution-content code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--accent);
}
.solution-content pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  margin: 18px 0;
}
.solution-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
}

.solution-content blockquote {
  border-left: 4px solid var(--accent);
  padding: 12px 20px;
  margin: 18px 0;
  background: var(--accent-lt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
}

.solution-content .katex-display {
  margin: 24px 0;
  overflow-x: auto;
  padding: 8px 0;
  text-align: center;
}
.solution-content .katex {
  font-size: 1.1em;
}

.solution-content .math-block {
  text-align: center;
  margin: 24px 0;
  overflow-x: auto;
}
.solution-content .math-block .katex-display {
  margin: 0 !important;
}

/* ── Chat Container ─────────────────────────────────────── */
.chat-container {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  background: var(--bg-tertiary);
  flex-shrink: 0;
}
.chat-container .text-input {
  flex: 1;
  padding: 12px 16px;
  border-radius: 99px;
}
.chat-container .btn {
  border-radius: 50%;
  width: 44px;
  height: 44px;
  padding: 0;
  justify-content: center;
  flex-shrink: 0;
}

.chat-msg-user {
  background: var(--bg-tertiary);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  margin: 24px 0 14px;
  font-weight: 500;
  color: var(--text-primary);
  border-left: 3px solid var(--accent);
}
.chat-msg-ai {
  margin-bottom: 24px;
  animation: fadeInUp 0.3s ease;
}

.chat-msg-ai > *:last-child {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0.5;
  }
  to {
    opacity: 1;
  }
}

.chat-msg-thinking {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-secondary);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-muted);
  animation: fadeInUp 0.3s ease;
}
.chat-msg-thinking .loading-dots {
  gap: 4px;
}
.chat-msg-thinking .loading-dots span {
  width: 5px;
  height: 5px;
}

/* ── Error Message Box ──────────────────────────────────── */
.error-msg-box {
  background: rgba(239, 68, 68, 0.05); /* very light danger background */
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: fadeInUp 0.3s ease;
}
.error-msg-header {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--danger);
  font-weight: 600;
  font-size: 15px;
}
.error-msg-header .error-icon {
  width: 20px;
  height: 20px;
}
.error-msg-body {
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
}
.error-msg-body code {
  background: var(--bg-hover);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--danger);
}

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ── PDF Template Styling ──────────────────────────────── */
.pdf-template {
  background: #fff !important;
  color: #0f1117 !important;
  padding: 40px;
  width: 800px; /* Base width for capture */
  font-family: "Inter", system-ui, sans-serif;
}

/* Force light mode colors in PDF regardless of app theme */
.pdf-template .solution-content {
  color: #0f1117 !important;
  background: #fff !important;
  padding: 0 !important;
  animation: none !important;
}
.pdf-template .solution-content h2 {
  color: #2563eb !important;
  border-bottom-color: #e5e7eb !important;
}
.pdf-template .solution-content blockquote {
  background: #f0f7ff !important;
  border-left-color: #2563eb !important;
  color: #4b5563 !important;
}
.pdf-template .solution-content code {
  background: #f3f4f6 !important;
  border-color: #e5e7eb !important;
  color: #2563eb !important;
}
.pdf-template .solution-content pre {
  background: #f3f4f6 !important;
  border-color: #e5e7eb !important;
}

.pdf-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 2px solid #2563eb;
  padding-bottom: 15px;
  margin-bottom: 30px;
}

.pdf-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.pdf-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: #2563eb;
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
}
.pdf-logo .logo-text {
  font-size: 20px;
  font-weight: 800;
  color: #0f1117;
}
.pdf-logo .logo-accent {
  color: #2563eb;
}

.pdf-meta {
  text-align: right;
  font-size: 12px;
  color: #6b7280;
  line-height: 1.6;
}

.pdf-section {
  margin-bottom: 35px;
}
.pdf-section-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  color: #9ca3af;
  letter-spacing: 1px;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.pdf-section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: #f3f4f6;
}

.pdf-question-container {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 15px;
  display: flex;
  justify-content: center;
  max-height: 400px;
  overflow: hidden;
}
.pdf-question-container img {
  max-width: 100%;
  max-height: 370px;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.pdf-footer {
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px solid #f3f4f6;
  text-align: center;
  font-size: 12px;
  color: #9ca3af;
}

/* Page break handling for html2pdf */
.pdf-section {
  page-break-inside: avoid;
}
.solution-content h2 {
  page-break-before: auto;
  page-break-after: avoid;
}
.solution-content p,
.solution-content ul,
.solution-content ol {
  page-break-inside: avoid;
}

/* ============================================================
   MOBILE TAB BAR
   ============================================================ */
.mobile-tab-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 150;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 6px 16px calc(6px + env(safe-area-inset-bottom));
  gap: 8px;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
}
.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--tr);
}
.tab-btn svg {
  width: 22px;
  height: 22px;
}
.tab-btn.active {
  color: var(--accent);
  background: var(--accent-lt);
}
.tab-btn.active svg {
  stroke: var(--accent);
}

/* Mobile solve FAB */
.mobile-solve-fab {
  display: none;
  position: fixed;
  bottom: calc(72px + env(safe-area-inset-bottom));
  right: 18px;
  z-index: 140;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  box-shadow:
    0 4px 20px var(--accent-glow),
    0 2px 8px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--tr);
  font-size: 24px;
}
.mobile-solve-fab:active {
  transform: scale(0.92);
}
.mobile-solve-fab svg {
  width: 24px;
  height: 24px;
}
.mobile-solve-fab.hidden {
  display: none !important;
}

/* Touch selection mode banner */
.touch-select-banner {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: linear-gradient(
    135deg,
    var(--accent),
    hsl(var(--accent-h), 82%, 45%)
  );
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}
.touch-select-banner svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.touch-select-banner .banner-cancel {
  margin-left: auto;
  background: rgba(255, 255, 255, 0.25);
  border: none;
  color: #fff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  flex-shrink: 0;
}

/* Larger touch handles for mobile */
@media (hover: none) and (pointer: coarse) {
  .sel-handle {
    width: 24px !important;
    height: 24px !important;
    border-width: 3px !important;
  }
  /* Hide side handles on mobile to simplify UX */
  .sel-n,
  .sel-s,
  .sel-e,
  .sel-w {
    display: none !important;
  }
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Settings Full Screen Mobile */
  .settings-modal {
    width: 100vw;
    height: 100%;
    margin-left: 0;
    border-radius: 0;
    max-height: none;
    border-left: none;
    border-bottom: none;
    animation: slideUpMobile 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  }
  @keyframes slideUpMobile {
    from {
      opacity: 0;
      transform: translateY(100%);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  /* Header */
  .header {
    padding: 0 14px;
  }
  .header-tagline {
    display: none;
  }
  .logo-text {
    font-size: 16px;
  }

  /* Body / Layout */
  body {
    overflow: hidden;
  }
  .main-layout {
    flex-direction: column;
    height: calc(100dvh - var(--header-h) - 64px); /* 64px = tab bar */
    overflow: hidden;
  }

  /* Panels */
  .panel-left,
  .panel-right {
    flex: none;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    transition:
      opacity 0.25s ease,
      transform 0.25s ease;
  }
  .panel.panel-hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateX(6px);
  }
  .panel-divider {
    display: none;
  }

  /* Tab bar */
  .mobile-tab-bar {
    display: flex;
  }
  #tabSelectRegion {
    display: none !important;
  }

  /* Mobile FAB */
  .mobile-solve-fab {
    display: flex;
  }

  /* Solution header: stack pills + actions */
  .solution-header {
    flex-direction: column;
    padding: 8px 10px;
    gap: 10px;
  }

  .model-carousel-wrapper {
    width: 100%;
  }

  .model-carousel {
    padding: 4px 10px;
  }

  .model-card {
    flex: 0 0 160px;
    padding: 6px 10px;
  }

  .solution-header-actions {
    display: none;
  }

  /* Viewer body */
  .viewer-body {
    padding: 12px;
  }

  /* Upload zone */
  .upload-content {
    padding: 28px 16px;
  }
  .upload-icon-wrap {
    width: 58px;
    height: 58px;
  }
  .upload-title {
    font-size: 14px;
  }

  /* Hint bar */
  .hint-bar {
    font-size: 11px;
    padding: 6px 10px;
  }

  /* Touch select banner show on mobile */
  .touch-select-banner {
    display: flex;
  }

  /* Solution body scrollable */
  .solution-body {
    flex: 1;
    overflow-y: auto;
  }

  /* Toast higher up (above tab bar) */
  .toast {
    bottom: calc(80px + env(safe-area-inset-bottom));
  }

  /* Chat container: thin + transparent (mobile) */
  .chat-container {
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    background: transparent;
    border-top: 0;
    gap: 8px;
  }
  .chat-container .text-input {
    background: transparent;
    padding: 9px 12px;
    font-size: 13px;
  }
  .chat-container .btn {
    width: 40px;
    height: 40px;
  }

  /* File header: compact */
  .file-header {
    padding: 6px 10px;
  }
  .file-name {
    max-width: 120px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .solution-header-actions #downloadBtn,
  .solution-header-actions #copyLatexBtn {
    display: none;
  }
  .models-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 8px;
  }
  .settings-provider-header {
    flex-wrap: wrap; /* allow wrapping if too constrained */
  }
}