:root {
  --primary-red: #9a0000;
  --primary-blue: #044ba6;
  --black: #000000;
  --light-gray: #808080;
  --bg-light: #f2f2e6;
  --white: #ffffff;
  --shadow: rgba(154, 0, 0, 0.05);
  --navbar-height: 72px;
  --spine-thickness: 4px;
  --branch-thickness: 2px;
}

/* HEADER */
.header {
  min-height: 45vh;
  background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-blue) 100%);
  color: var(--white);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/*arranges header on page*/
.hero {
  position: absolute;
  top: 55%;
  left: 50%;
  width: 90%;
  transform: translate(-50%, -50%);
  text-align: center;;
}

/* =========================================================
   Fishbone tool: layout and shared controls
   ========================================================= */

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin: 0 auto 16px;
}

.controls button,
.prioritization-controls button {
  padding: 7px 13px;
  border: 0;
  border-radius: 4px;
  background: var(--primary-blue);
  color: var(--white);
  font-family: inherit;
  font-size: 1.25rem;
  line-height: 1.2;
  cursor: pointer;
}

.controls button:hover,
.prioritization-controls button:hover {
  opacity: 0.9;
}

.controls button:focus-visible,
.prioritization-controls button:focus-visible {
  outline: 3px solid rgba(4, 75, 162, 0.28);
  outline-offset: 2px;
}

/* =========================================================
   Fishbone drawing area
   ========================================================= */

.fishbone-tool-container {
  max-width: 1440px;
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  max-width: none;
  height: 560px;
  margin: 0;
  box-sizing: border-box;
  overflow: auto;
  background: var(--white);
  border: 1px solid var(--light-gray, #d5d5d5);
  border-radius: 6px;
}

.fishbone-container {
  position: relative;
  width: 96%;
  height: 92%;
  min-width: 1180px;
  min-height: 470px;
  margin: 0 auto;
  box-sizing: border-box;
  user-select: none;
}

/* Spine and primary category lines are positioned by JS */
.spine {
  position: absolute;
  z-index: 1;
  background: var(--primary-red);
  border-radius: 2px;
}

.category-line {
  position: absolute;
  z-index: 2;
  background: var(--primary-blue);
  border-radius: 2px;
}

.category-label {
  position: absolute;
  z-index: 3;
  color: var(--primary-blue);
  font-size: 1.25rem;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
}

/* =========================================================
   Add-cause button, cause branches, and cause input
   ========================================================= */

.add-cause-btn {
  position: absolute;
  z-index: 5;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 2px solid var(--primary-blue);
  border-radius: 50%;
  background: var(--white);
  color: var(--primary-blue);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 18px;
  text-align: center;
  cursor: pointer;
}

.add-cause-btn:hover {
  background: #eaf3ff;
}

.add-cause-btn:focus-visible {
  outline: 3px solid rgba(4, 75, 162, 0.28);
  outline-offset: 2px;
}

.cause-line {
  position: absolute;
  z-index: 2;
  background: var(--primary-red);
  border-radius: 2px;
}

.cause-input {
  position: absolute;
  z-index: 6;
  box-sizing: border-box;
  padding: 4px 28px 4px 7px;
  border: 1px solid var(--light-gray);
  border-radius: 4px;
  outline: 0;
  background: var(--white);
  color: var(--black);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.2;
}

.cause-input:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 2px rgba(4, 75, 162, 0.16);
}

.delete-cause-btn {
  position: absolute;
  z-index: 7;
  width: 18px;
  height: 18px;
  padding: 0;
  border: 1px solid var(--light-gray);
  border-radius: 50%;
  background: var(--white);
  color: var(--light-gray);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1;
  text-align: center;
  cursor: pointer;
}

.delete-cause-btn:hover {
  border-color: var(--primary-red);
  background:#fff3f3;
  color: var(--primary-red);
}

.delete-cause-btn:focus-visible {
  outline: 3px solid rgba(154, 0, 0, 0.2);
  outline-offset: 2px;
}

/* =========================================================
   Fish head / editable problem statement
   ========================================================= */

.fish-head {
  position: absolute;
  z-index: 4;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-sizing: border-box;
  padding: 9px 12px;
  border: 2px solid var(--primary-red);
  border-radius: 8px;
  background: var(--white);
}

.fish-head-label {
  display: block;
  margin-bottom: 4px;
  color: var(--light-gray);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
}

.problem-statement-input {
  width: 100%;
  min-height: 44px;
  box-sizing: border-box;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--black);
  font-family: inherit;
  font-size: 0.9rem;
  line-height: 1.25;
  text-align: center;
}

.problem-statement-input:focus-visible {
  outline: 2px solid rgba(4, 75, 162, 0.26);
  outline-offset: 2px;
  border-radius: 3px;
}

/* =========================================================
   Prioritization section and table
   ========================================================= */

.prioritization-section {
  max-width: 1200px;
  margin: 24px auto 40px;
  padding: 16px 20px;
  border: 1px solid var(--light-gray);
  border-radius: 6px;
  background: var(--white);
}

.prioritization-section h2 {
  margin: 0 0 12px;
  color: var(--black);
  font-size: 1.75rem;
}

.prioritization-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--light-gray);
  border-radius: 4px;
}

#prioritization-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  background: var(--white);
}

#prioritization-table th,
#prioritization-table td {
  padding: 8px 10px;
  border: 1px solid var(--light-gray);
  color: var(--black);
  font-size: 1rem;
  text-align: center;
}

#prioritization-table th {
  background: var(--white);
  font-weight: 600;
}

#prioritization-table .score-input {
  width: 66px;
  box-sizing: border-box;
  padding: 5px 6px;
  border: 1px solid var(--light-gray);
  border-radius: 4px;
  font: inherit;
  font-size: 1rem;
  text-align: left;
}

#prioritization-table .score-input:focus {
  border-color: var(--primary-blue);
  outline: 0;
  box-shadow: 0 0 0 2px rgba(4, 75, 162, 0.16);
}

#prioritization-table th.total-col,
#prioritization-table td.total-col {
  min-width: 62px;
  background: var(--bg-light);
  font-weight: 600;
  text-align: center;
}

/* Top-ranked causes in the fishbone */
.cause-line.top-cause {
  background: var(--primary-red);
  box-shadow: 0 0 0 1px var(--primary-red);
}

.cause-input.top-cause {
  border-color: var(--primary-blue);
  background: #fff3f3;
}

/* Top-ranked causes in the table */
#prioritization-table tr.top-cause-row td {
  color: var(--primary-blue);
  font-weight: bold;
  background: #fff3f3;
}

#prioritization-table tr.top-cause-row td.total-col {
  background: var(--bg-light);
  color: var(--primary-red);
}

.prioritization-message {
  min-height: 1.35em;
  margin: 0 0 12px;
  color: var(--primary-blue);
  line-height: 1.35;
}

.prioritization-message.is-error {
  color: var(--primary-red);
  font-weight: 600;
}

.canvas-wrapper {
  position: relative;
}

.fishbone-canvas-logo {
  position: absolute !important;
  z-index: 50 !important;
  left: 18px !important;
  bottom: 4px !important;
  width: 92px !important;
  height: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  object-fit: contain;
  opacity: 0.9;
  pointer-events: none;
}

/* Hidden on desktop; shown only on mobile */
.fishbone-mobile-teaser {
  display: none;
}

.hint {
  text-align: left;
  margin-top: 2rem;
  margin-bottom: 2rem;
  line-height: 1.5;
}


/* =========================
   Mobile styles (≤ 900px)
   ========================= */

@media (max-width: 900px) {

  /* =========================
   Fishbone tool on mobile
   ========================= */

/* Hide every desktop-only Fishbone UI element, including its heading and hint.
   Keeping it in the DOM prevents desktop functionality from being affected. */
.fishbone-tool-container {
  display: none !important;
}

/* Show the static mobile teaser only on mobile */
.fishbone-mobile-teaser {
  display: block;
  padding: 2rem 1rem;
  background: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: 6px;
  margin-top: 1rem;
}

.fishbone-teaser-content {
  max-width: 540px;
  margin: 0 auto;
  text-align: center;
}

.fishbone-teaser-content h3 {
  color: var(--primary-blue);
  font-size: 1.5rem;
  margin: 0 0 0.75rem;
  line-height: 1.3;
}

.fishbone-teaser-content p {
  color: var(--black);
  font-size: 1.25rem;
  line-height: 1.5;
  margin: 0 0 1.25rem;
}

.fishbone-teaser-image {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin: 0 auto;
  border: 1px solid var(--light-gray);
  border-radius: 6px;
}
}

/* =========================
   Extra-small screens (≤ 480px)
   ========================= */

@media (max-width: 480px) {
 .cta-btn {
    padding: 0.75rem 2rem;
  }
}