:root {
  --harbor-navy: #183247;
  --harbor-blue: #2e6685;
  --harbor-light-blue: #dff3f7;
  --harbor-cream: #fffaf0;
  --harbor-sand: #ead9b6;
  --harbor-gold: #d5a63d;
  --harbor-brown: #6e4c2f;
  --harbor-red: #b8443c;
  --white: #ffffff;
  --black: #1e1e1e;
  --soft-gray: #eef1f3;
  --medium-gray: #c7d0d5;
  --dark-gray: #56636a;
  --shadow: 0 8px 22px rgba(18, 48, 66, 0.14);
  --small-shadow: 0 3px 10px rgba(18, 48, 66, 0.12);
  --rounded-large: 24px;
  --rounded-medium: 16px;
  --rounded-small: 10px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--harbor-navy);
  background:
    radial-gradient(
      circle at top left,
      rgba(223, 243, 247, 0.95),
      transparent 38%
    ),
    linear-gradient(
      180deg,
      #f8fdff 0%,
      #fffaf0 60%,
      #f4ead6 100%
    );
  font-family:
    Georgia,
    "Times New Roman",
    serif;
}

button,
input {
  font: inherit;
}

button {
  touch-action: manipulation;
}

button:focus-visible,
input:focus-visible {
  outline: 4px solid rgba(46, 102, 133, 0.32);
  outline-offset: 3px;
}

.app-header {
  position: relative;
  overflow: hidden;
  padding: 38px 22px 46px;
  color: var(--white);
  text-align: center;
  background:
    linear-gradient(
      135deg,
      rgba(24, 50, 71, 0.98),
      rgba(46, 102, 133, 0.93)
    );
  border-bottom: 7px solid var(--harbor-gold);
}

.app-header::before,
.app-header::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.app-header::before {
  width: 260px;
  height: 260px;
  top: -150px;
  left: -80px;
  background: rgba(255, 255, 255, 0.07);
}

.app-header::after {
  width: 340px;
  height: 340px;
  right: -160px;
  bottom: -220px;
  background: rgba(255, 255, 255, 0.06);
}

.header-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 8px;
  color: #f4d57c;
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.app-header h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  line-height: 1;
}

.header-message {
  max-width: 660px;
  margin: 16px auto 0;
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-size: clamp(1rem, 2.2vw, 1.22rem);
  line-height: 1.6;
}

.coloring-app {
  width: min(1500px, calc(100% - 32px));
  margin: 32px auto 60px;
}

.page-selector-section {
  padding: 24px;
  background: rgba(255, 255, 255, 0.88);
  border: 2px solid rgba(46, 102, 133, 0.18);
  border-radius: var(--rounded-large);
  box-shadow: var(--shadow);
}

.section-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.section-heading-row h2,
.tool-panel h2,
.canvas-heading h2 {
  margin: 0;
}

.section-heading-row p {
  margin: 6px 0 0;
  color: var(--dark-gray);
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  line-height: 1.5;
}

.page-carousel {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
}

.carousel-arrow {
  width: 50px;
  min-width: 50px;
  height: 70px;
  padding: 0;
  color: var(--white);
  background: var(--harbor-blue);
  border: 0;
  border-radius: 14px;
  box-shadow: var(--small-shadow);
  cursor: pointer;
  font-size: 1.65rem;
  font-weight: 700;
  transition:
    transform 160ms ease,
    background 160ms ease;
}

.carousel-arrow:hover {
  background: var(--harbor-navy);
  transform: translateY(-2px);
}

.carousel-arrow:active {
  transform: translateY(0);
}

.page-thumbnail-list {
  display: flex;
  gap: 16px;
  min-width: 0;
  overflow-x: auto;
  padding: 8px 4px 15px;
  scrollbar-color: var(--harbor-blue) var(--soft-gray);
  scrollbar-width: thin;
  scroll-behavior: smooth;
}

.page-thumbnail-list::-webkit-scrollbar {
  height: 10px;
}

.page-thumbnail-list::-webkit-scrollbar-track {
  background: var(--soft-gray);
  border-radius: 999px;
}

.page-thumbnail-list::-webkit-scrollbar-thumb {
  background: var(--harbor-blue);
  border-radius: 999px;
}

.page-thumbnail {
  flex: 0 0 170px;
  min-width: 170px;
  padding: 8px;
  color: var(--harbor-navy);
  background: var(--white);
  border: 3px solid transparent;
  border-radius: 15px;
  box-shadow: var(--small-shadow);
  cursor: pointer;
  text-align: left;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.page-thumbnail:hover {
  transform: translateY(-3px);
  box-shadow: 0 7px 16px rgba(18, 48, 66, 0.18);
}

.page-thumbnail.active {
  border-color: var(--harbor-gold);
  box-shadow:
    0 0 0 4px rgba(213, 166, 61, 0.18),
    var(--small-shadow);
}

.page-thumbnail img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--white);
  border-radius: 10px;
}

.page-thumbnail-title {
  display: block;
  margin-top: 8px;
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(275px, 340px) minmax(0, 1fr);
  gap: 26px;
  align-items: start;
  margin-top: 28px;
}

.tool-panel {
  position: sticky;
  top: 18px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.94);
  border: 2px solid rgba(46, 102, 133, 0.18);
  border-radius: var(--rounded-large);
  box-shadow: var(--shadow);
}

.tool-panel > h2 {
  padding-bottom: 14px;
  border-bottom: 3px solid var(--harbor-sand);
}

.tool-group {
  margin-top: 24px;
}

.tool-group h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.tool-group label {
  display: block;
  margin-bottom: 10px;
}

.tool-button-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
}

.tool-button {
  min-height: 80px;
  padding: 10px 7px;
  color: var(--harbor-navy);
  background: #f9fcfd;
  border: 2px solid var(--medium-gray);
  border-radius: 13px;
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.tool-button:hover {
  border-color: var(--harbor-blue);
  transform: translateY(-2px);
}

.tool-button.active {
  color: var(--white);
  background: var(--harbor-blue);
  border-color: var(--harbor-blue);
}

.tool-button span {
  display: block;
}

.tool-icon {
  margin-bottom: 4px;
  font-size: 1.55rem;
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.color-picker {
  width: 78px;
  height: 56px;
  padding: 3px;
  background: var(--white);
  border: 2px solid var(--medium-gray);
  border-radius: 12px;
  cursor: pointer;
}

.current-color-display {
  flex: 1;
  min-width: 70px;
  height: 56px;
  background: #f4b942;
  border: 4px solid var(--white);
  border-radius: 12px;
  box-shadow:
    0 0 0 2px var(--medium-gray),
    inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.preset-color-palette {
  display: grid;
  grid-template-columns: repeat(6, minmax(34px, 1fr));
  gap: 9px;
  margin-top: 14px;
}

.color-swatch {
  width: 100%;
  aspect-ratio: 1;
  min-height: 34px;
  padding: 0;
  background: var(--swatch-color);
  border: 3px solid var(--white);
  border-radius: 50%;
  box-shadow:
    0 0 0 1px rgba(24, 50, 71, 0.28),
    var(--small-shadow);
  cursor: pointer;
  transition:
    transform 140ms ease,
    box-shadow 140ms ease;
}

.color-swatch:hover {
  transform: scale(1.1);
}

.color-swatch.selected {
  box-shadow:
    0 0 0 4px var(--harbor-gold),
    var(--small-shadow);
  transform: scale(1.06);
}

.light-swatch {
  border-color: #e1e5e8;
}

#brushSize {
  width: 100%;
  accent-color: var(--harbor-blue);
}

#brushSizeGroup p {
  margin: 8px 0 0;
  color: var(--dark-gray);
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-size: 0.92rem;
}

.control-button-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.control-button {
  min-height: 44px;
  padding: 10px 9px;
  color: var(--harbor-navy);
  background: #f5f8f9;
  border: 2px solid var(--medium-gray);
  border-radius: 11px;
  cursor: pointer;
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-weight: 700;
  transition:
    background 150ms ease,
    border-color 150ms ease,
    transform 150ms ease;
}

.control-button:hover {
  background: var(--harbor-light-blue);
  border-color: var(--harbor-blue);
  transform: translateY(-1px);
}

.control-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.danger-button {
  color: #7a201b;
  background: #fff0ee;
  border-color: #dba8a4;
}

.danger-button:hover {
  color: var(--white);
  background: var(--harbor-red);
  border-color: var(--harbor-red);
}

.save-button {
  width: 100%;
  min-height: 54px;
  margin-top: 25px;
  padding: 13px 16px;
  color: var(--white);
  background: var(--harbor-gold);
  border: 0;
  border-radius: 14px;
  box-shadow: var(--small-shadow);
  cursor: pointer;
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-size: 1.02rem;
  font-weight: 800;
  transition:
    transform 160ms ease,
    filter 160ms ease;
}

.save-button:hover {
  filter: brightness(0.92);
  transform: translateY(-2px);
}

.canvas-panel {
  min-width: 0;
  padding: 24px;
  background: rgba(255, 255, 255, 0.94);
  border: 2px solid rgba(46, 102, 133, 0.18);
  border-radius: var(--rounded-large);
  box-shadow: var(--shadow);
}

.canvas-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.small-label {
  margin: 0 0 5px;
  color: var(--harbor-blue);
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-size: 0.79rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tool-status {
  margin: 0;
  padding: 8px 13px;
  color: var(--harbor-navy);
  background: var(--harbor-light-blue);
  border: 1px solid rgba(46, 102, 133, 0.24);
  border-radius: 999px;
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  white-space: nowrap;
}

.canvas-viewport {
  position: relative;
  min-height: 540px;
  max-height: 78vh;
  overflow: auto;
  padding: 22px;
  background:
    linear-gradient(45deg, #e7ecef 25%, transparent 25%),
    linear-gradient(-45deg, #e7ecef 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e7ecef 75%),
    linear-gradient(-45deg, transparent 75%, #e7ecef 75%),
    #f5f7f8;
  background-position:
    0 0,
    0 12px,
    12px -12px,
    -12px 0;
  background-size: 24px 24px;
  border: 2px solid var(--medium-gray);
  border-radius: 17px;
  scrollbar-color: var(--harbor-blue) var(--soft-gray);
  scrollbar-width: thin;
}

.canvas-stage {
  width: fit-content;
  min-width: 100%;
  margin: 0 auto;
  text-align: center;
  transform-origin: top center;
}

#coloringCanvas {
  display: block;
  width: min(100%, 950px);
  height: auto;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid #b7c0c5;
  box-shadow: 0 7px 20px rgba(16, 42, 57, 0.2);
  cursor: crosshair;
  touch-action: none;
}

.canvas-instructions {
  margin: 16px 0 0;
  color: var(--dark-gray);
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  line-height: 1.55;
  text-align: center;
}

.dialog-overlay {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(8, 24, 35, 0.67);
}

.dialog-overlay.hidden {
  display: none;
}

.dialog-box {
  width: min(450px, 100%);
  padding: 28px;
  background: var(--white);
  border: 4px solid var(--harbor-gold);
  border-radius: 20px;
  box-shadow: 0 20px 55px rgba(0, 0, 0, 0.3);
}

.dialog-box h2 {
  margin: 0;
}

.dialog-box p {
  margin: 14px 0 22px;
  color: var(--dark-gray);
  font-family:
    Arial,
    Helvetica,
    sans-serif;
  line-height: 1.6;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 11px;
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .tool-panel {
    position: static;
  }

  .tool-panel {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 22px;
  }

  .tool-panel > h2,
  .save-button {
    grid-column: 1 / -1;
  }

  .canvas-viewport {
    max-height: none;
  }
}

@media (max-width: 760px) {
  .coloring-app {
    width: min(100% - 18px, 1500px);
    margin-top: 18px;
  }

  .app-header {
    padding: 30px 16px 38px;
  }

  .page-selector-section,
  .tool-panel,
  .canvas-panel {
    padding: 16px;
    border-radius: 18px;
  }

  .page-carousel {
    grid-template-columns: 42px minmax(0, 1fr) 42px;
    gap: 8px;
  }

  .carousel-arrow {
    width: 42px;
    min-width: 42px;
    height: 62px;
  }

  .page-thumbnail {
    flex-basis: 145px;
    min-width: 145px;
  }

  .tool-panel {
    display: block;
  }

  .canvas-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .canvas-viewport {
    min-height: 390px;
    padding: 10px;
  }

  .dialog-actions {
    flex-direction: column;
  }

  .dialog-actions .control-button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .section-heading-row h2,
  .tool-panel h2,
  .canvas-heading h2 {
    font-size: 1.38rem;
  }

  .tool-button-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .tool-button {
    min-height: 72px;
    font-size: 0.83rem;
  }

  .preset-color-palette {
    grid-template-columns: repeat(6, minmax(28px, 1fr));
    gap: 7px;
  }

  .control-button-grid {
    grid-template-columns: 1fr;
  }

  .canvas-viewport {
    min-height: 320px;
  }

  .tool-status {
    white-space: normal;
  }
}

/* Phase 1 page information and navigation */
.page-scripture {
  margin: 7px 0 0;
  color: var(--harbor-blue);
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
}
.page-story-panel {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin: 14px 0;
  padding: 14px 16px;
  background: var(--harbor-cream);
  border: 1px solid var(--harbor-sand);
  border-radius: 12px;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}
.page-story-panel p { margin: 0; }
.page-counter {
  flex: 0 0 auto;
  color: var(--harbor-blue);
  font-weight: 700;
  white-space: nowrap;
}
.page-navigation-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.page-nav-button {
  padding: 12px 16px;
  color: var(--white);
  background: var(--harbor-blue);
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
}
.page-nav-button:hover { background: var(--harbor-navy); }
.page-nav-button:disabled { opacity: .45; cursor: not-allowed; }
.page-thumbnail img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: white;
  border-radius: 9px;
}
.page-thumbnail.active {
  border-color: var(--harbor-gold);
  box-shadow: 0 0 0 3px rgba(213,166,61,.2);
}
@media (max-width: 700px) {
  .page-story-panel { flex-direction: column; gap: 8px; }
  .page-navigation-controls { grid-template-columns: 1fr; }
}

/* Detailed zoom and pan controls */
.zoom-level-display {
  grid-column: 1 / -1;
  margin: 0;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--harbor-light-blue);
  color: var(--harbor-navy);
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 800;
  text-align: center;
}

.canvas-viewport.is-panning,
.canvas-viewport.is-panning #coloringCanvas {
  cursor: grabbing !important;
  user-select: none;
}

#coloringCanvas.pan-ready {
  cursor: grab !important;
}