/* ═══════════════════════════════════════════════════════════════════
   UTXO PATH VISUALIZER
   STRICT BLUEPRINT — TWO COLOURS ONLY: #001F3F + #FFFFFF
   ═══════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;700&display=swap');

/* ─── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ─── Blueprint base: 40px grid + diagonal crosshatch ───────────── */
body {
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  color: #ffffff;
  height: 100vh;
  overflow: hidden;
  display: flex;
  background-color: #001F3F;
  background-image:
    repeating-linear-gradient( 45deg, rgba(255,255,255,0.03) 0, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(-45deg, rgba(255,255,255,0.03) 0, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(  0deg, transparent, transparent 39px, rgba(255,255,255,0.08) 40px),
    repeating-linear-gradient( 90deg, transparent, transparent 39px, rgba(255,255,255,0.08) 40px);
  background-size: 80px 80px, 80px 80px, 40px 40px, 40px 40px;
}

/* Vignette: paper-edge darkening */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 48%, rgba(0,4,18,0.7) 100%);
  pointer-events: none;
  z-index: 200;
}

/* Outer frame: single white ruled border */
body::before {
  content: '';
  position: fixed;
  inset: 5px;
  border: 1px solid rgba(255,255,255,0.14);
  pointer-events: none;
  z-index: 199;
}

/* ─── SIDEBAR — Specifications Panel ────────────────────────────── */
/* Shares the exact same background as body — seamless blueprint sheet */
#sidebar {
  position: fixed;
  left: 0; top: 0;
  width: 300px;
  height: 100vh;
  background-color: #001F3F;
  background-image:
    repeating-linear-gradient( 45deg, rgba(255,255,255,0.03) 0, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(-45deg, rgba(255,255,255,0.03) 0, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(  0deg, transparent, transparent 39px, rgba(255,255,255,0.08) 40px),
    repeating-linear-gradient( 90deg, transparent, transparent 39px, rgba(255,255,255,0.08) 40px);
  background-size: 80px 80px, 80px 80px, 40px 40px, 40px 40px;
  border-right: 2px solid #ffffff;
  overflow-y: auto;
  z-index: 20;
}

/* Panel header bar */
#sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55em 0.85em;
  border-bottom: 2px solid #ffffff;
}

.sidebar-title {
  font-size: 0.72em;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: #ffffff;
  text-transform: uppercase;
}


/* Section headers */
#sidebar h3 {
  display: flex;
  align-items: center;
  gap: 0.55em;
  font-size: 0.7em;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #ffffff;
  padding: 0.5em 0.85em;
  border-bottom: 1px solid rgba(255,255,255,0.22);
}

/* Inverted badge: the only place colours swap (still just the two) */
.section-num {
  background: #ffffff;
  color: #001F3F;
  font-size: 0.85em;
  font-weight: 700;
  padding: 1px 5px;
  letter-spacing: 0.05em;
}

#tx-info, #network-info, #oracle-info { border-bottom: 1px solid rgba(255,255,255,0.18); }

#sidebar ul { list-style: none; }

#sidebar ul li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.4em;
  padding: 0.28em 0.85em;
  font-size: 0.72em;
  color: #ffffff;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

#sidebar ul li .label {
  color: rgba(255,255,255,0.5);
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

#sidebar ul li.full-row { flex-direction: column; gap: 0.2em; padding-bottom: 0.5em; }
#sidebar ul li.full-row .mono {
  font-family: inherit;
  font-size: 0.88em;
  word-break: break-all;
  color: #ffffff;
}

.placeholder {
  font-size: 0.7em;
  color: rgba(255,255,255,0.28);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.6em 0.85em;
}

#refresh-btn {
  display: block;
  width: calc(100% - 1.7em);
  margin: 0.8em 0.85em;
  background: transparent;
  color: #ffffff;
  border: 1px solid #ffffff;
  padding: 0.4em 0.9em;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.72em;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s;
}
#refresh-btn:hover { background: #ffffff; color: #001F3F; }

/* ─── Oracle / procedural field notes ───────────────────────────── */
#oracle-info { padding-bottom: 1em; }

.oracle-note {
  margin: 0.75em 0.85em 0;
  padding: 0.55em 0.7em;
  border-left: 2px solid rgba(255,255,255,0.25);
  position: relative;
}
.oracle-note + .oracle-note { margin-top: 0.6em; }

.oracle-label {
  display: block;
  font-size: 0.6em;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: rgba(255,255,255,0.38);
  margin-bottom: 0.3em;
}

.oracle-note p {
  margin: 0;
  font-size: 0.68em;
  line-height: 1.6;
  color: rgba(255,255,255,0.62);
  font-style: italic;
}

.oracle-note p em {
  font-style: normal;
  color: rgba(255,255,255,0.9);
  font-weight: 600;
}

/* ─── MAIN area ──────────────────────────────────────────────────── */
#main {
  margin-left: 300px;
  width: calc(100vw - 300px);
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ─── HEADER — Blueprint Title Block ────────────────────────────── */
#header {
  flex-shrink: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  background-color: #001F3F;
  background-image:
    repeating-linear-gradient( 45deg, rgba(255,255,255,0.03) 0, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(-45deg, rgba(255,255,255,0.03) 0, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(  0deg, transparent, transparent 39px, rgba(255,255,255,0.08) 40px),
    repeating-linear-gradient( 90deg, transparent, transparent 39px, rgba(255,255,255,0.08) 40px);
  background-size: 80px 80px, 80px 80px, 40px 40px, 40px 40px;
  border-bottom: 2px solid #ffffff;
  min-height: 64px;
}

/* LEFT: project identity */
#title-block {
  display: flex;
  align-items: center;
  gap: 0.7em;
  padding: 0.6em 1.2em;
  border-right: 2px solid #ffffff;
}

#title-logo {
  font-size: 2em;
  color: #ffffff;
  line-height: 1;
  flex-shrink: 0;
}

#title-text { display: flex; flex-direction: column; gap: 0.08em; }

#title-main {
  font-size: 0.88em;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: #ffffff;
  white-space: nowrap;
}

#title-sub {
  font-size: 0.6em;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.42);
  white-space: nowrap;
}

/* CENTER: TXID input */
#header-center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2em;
  padding: 0.5em 1.2em;
}

.field-label {
  font-size: 0.6em;
  letter-spacing: 0.16em;
  color: rgba(255,255,255,0.42);
  text-transform: uppercase;
}

#input-row { display: flex; gap: 0.5em; align-items: center; }

#txid-input {
  flex: 1;
  background: transparent;
  color: #ffffff;
  border: 1px solid #ffffff;
  padding: 0.42em 0.7em;
  font-family: inherit;
  font-size: 0.78em;
  letter-spacing: 0.04em;
  outline: none;
  caret-color: #ffffff;
  border-radius: 0;
  transition: box-shadow 0.15s;
}
#txid-input:focus {
  box-shadow: 0 0 0 1px rgba(255,255,255,0.5), inset 0 0 0 1px rgba(255,255,255,0.1);
}
#txid-input::placeholder {
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.08em;
}

#visualize-btn {
  background: transparent;
  color: #ffffff;
  border: 1px solid #ffffff;
  padding: 0.42em 1.2em;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.78em;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  white-space: nowrap;
  border-radius: 0;
  transition: background 0.15s, color 0.15s;
}
#visualize-btn:hover:not(:disabled) { background: #ffffff; color: #001F3F; }
#visualize-btn:disabled { opacity: 0.35; cursor: not-allowed; }

#status-msg {
  font-size: 0.65em;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.48);
  text-transform: uppercase;
  min-height: 1em;
}
/* Error is still white — the word "ERROR" carries the meaning */
#status-msg.error { color: #ffffff; opacity: 1; }

/* RIGHT: drawing metadata */
#drawing-meta {
  display: flex;
  flex-direction: column;
  border-left: 2px solid #ffffff;
}

.meta-cell {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0.2em 0.85em;
  border-bottom: 1px solid rgba(255,255,255,0.22);
  min-width: 100px;
}
.meta-cell:last-child { border-bottom: none; }
.meta-cell .field-label { font-size: 0.58em; }
.meta-cell > span:last-child {
  font-size: 0.72em;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.06em;
}

#drawing-no {
  color: #ffffff !important;
  font-size: 0.68em !important;
  word-break: break-all;
}

/* ─── Visualisation canvas ───────────────────────────────────────── */
#viz {
  flex: 1;
  overflow: hidden;
  cursor: grab;
  position: relative;
}
#viz:active { cursor: grabbing; }

/* ─── D3 LINKS — chunky blueprint ribbons ────────────────────────── */

/* Primary chain — thick solid white ribbon with glow pulse */
.link {
  fill: none;
  stroke: #ffffff;
  stroke-width: 10;
  stroke-linecap: round;
  stroke-linejoin: round;
  animation: ribbon-pulse 3.2s ease-in-out infinite;
}

/* Secondary inputs — medium semi-transparent ribbon */
.link.ghost {
  stroke: rgba(255,255,255,0.22);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
  animation: ribbon-pulse-dim 4.8s ease-in-out infinite;
}

/* Output satellite — slim ribbon */
.link.output {
  stroke: rgba(255,255,255,0.35);
  stroke-width: 2.5;
  stroke-linecap: round;
  animation: ribbon-pulse-dim 3.8s ease-in-out infinite;
}

/* Primary ribbon: glow expands and contracts subtly */
@keyframes ribbon-pulse {
  0%, 100% {
    stroke-opacity: 0.78;
    filter: drop-shadow(0 0 2px rgba(255,255,255,0.30));
  }
  50% {
    stroke-opacity: 1.0;
    filter: drop-shadow(0 0 9px rgba(255,255,255,0.72));
  }
}

/* Dimmer ribbon: opacity only, no harsh glow */
@keyframes ribbon-pulse-dim {
  0%, 100% { stroke-opacity: 0.55; }
  50%       { stroke-opacity: 0.90; }
}

/* ─── D3 NODES ───────────────────────────────────────────────────── */
.node { cursor: pointer; }

/* Inner scale group — hover = 1.05× */
.node-inner {
  transform-origin: 0 0;
  transform-box: fill-box;
  transition: transform 0.12s ease;
}
.node:hover .node-inner { transform: scale(1.05); }

/* Background fill rect — no stroke; slightly expanded so the border
   frame's inner edge lands exactly on the content boundary (rx2, ry2) */
.node-bg { fill: #001F3F; stroke: none; }
.node.ghost .node-bg { fill: none; }

/* Border frame rect — stroke only; inner edge = content boundary */
.node-border { fill: none; stroke: #ffffff; stroke-width: 4.5; }
.node.coinbase .node-border { stroke-width: 5.5; }
.node.depth-limit .node-border { stroke-width: 2; stroke-dasharray: 5 2; }
.node.ghost .node-border {
  stroke: rgba(255,255,255,0.25);
  stroke-width: 1.2;
  stroke-dasharray: 4 3;
}

/* Output UTXO satellite nodes — solid, lighter border */
.node.output .node-border {
  stroke: rgba(255,255,255,0.45);
  stroke-width: 1.5;
}

/* Clipboard copy flash — styled + animated entirely via D3 transition */
.copy-flash { pointer-events: none; }

/* Inner double-rule frame (engineering drafting detail) */
.node-inner-border {
  fill: none;
  stroke: rgba(255,255,255,0.25);
  stroke-width: 0.8;
}

/* Horizontal divider inside nodes */
.node-divider {
  stroke: rgba(255,255,255,0.22);
  stroke-width: 0.8;
}

/* Glow on hover: pure white only */
.node.hovered .node-border { filter: url(#glow-white); }

/* ─── Node text ──────────────────────────────────────────────────── */
.node text {
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  pointer-events: none;
  user-select: none;
  fill: #ffffff;
}

/* TXID label — bold, inked look via dark backing stroke */
.node-txid {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  fill: #ffffff;
  paint-order: stroke fill;
  stroke: rgba(0,31,63,0.65);
  stroke-width: 2px;
}

.node-amount {
  font-size: 9.5px;
  font-weight: 500;
  fill: rgba(255,255,255,0.76);
  letter-spacing: 0.02em;
}

.node-height {
  font-size: 8px;
  fill: rgba(255,255,255,0.38);
  letter-spacing: 0.03em;
}

/* Ghost + depth-limit text: dim white */
.node.ghost text       { fill: rgba(255,255,255,0.3); font-size: 9px; }
.node.depth-limit text { fill: rgba(255,255,255,0.7); font-size: 10px; }
.node-depth-hint       { fill: rgba(255,255,255,0.42) !important; font-size: 8px !important; font-style: italic; letter-spacing: 0.04em; }
.node.depth-limit:hover .node-border { stroke: rgba(255,255,255,0.9); filter: url(#glow-white); }
.node.depth-limit:hover .node-depth-hint { fill: rgba(255,255,255,0.85) !important; }

/* ─── Tooltip — Engineering annotation callout ───────────────────── */
.tooltip {
  position: fixed;
  display: none;
  background: #001F3F;
  border: 2px solid #ffffff;
  /* Double-ruled inner frame via inset box-shadow */
  box-shadow: inset 0 0 0 4px #001F3F, inset 0 0 0 5px rgba(255,255,255,0.28);
  padding: 0.6em 0.8em;
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 0.72em;
  color: #ffffff;
  pointer-events: none;
  max-width: 300px;
  z-index: 100;
  line-height: 1.65;
}

.tooltip .tip-txid {
  font-size: 0.87em;
  word-break: break-all;
  color: #ffffff;
  font-weight: 700;
  margin-bottom: 6px;
  padding-bottom: 5px;
  border-bottom: 1px solid rgba(255,255,255,0.28);
  letter-spacing: 0.02em;
}

.tooltip table { border-collapse: collapse; width: 100%; }
.tooltip td { padding: 1px 5px 1px 0; vertical-align: top; }
.tooltip td:first-child {
  color: rgba(255,255,255,0.48);
  white-space: nowrap;
  letter-spacing: 0.06em;
  padding-right: 0.9em;
}

/* ─── Mobile panel close button (hidden on desktop) ─────────────── */
#panel-close { display: none; }

/* ─── Mobile FAB (hidden on desktop) ────────────────────────────── */
#panel-fab {
  display: none;
  position: fixed;
  bottom: calc(1.2rem + env(safe-area-inset-bottom));
  right: 1.2rem;
  z-index: 50;
  background: #001F3F;
  color: #ffffff;
  border: 2px solid #ffffff;
  font-family: inherit;
  font-size: 0.68em;
  font-weight: 700;
  letter-spacing: 0.18em;
  padding: 0.55em 1em;
  cursor: pointer;
  box-shadow: 0 0 18px rgba(255,255,255,0.18);
  transition: background 0.15s, color 0.15s;
}
#panel-fab:hover,
#panel-fab:active { background: #ffffff; color: #001F3F; }

/* ─── Panel backdrop (mobile only) ──────────────────────────────── */
#panel-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 10, 25, 0.6);
  z-index: 18;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

/* ─── Mobile layout ──────────────────────────────────────────────── */
@media (max-width: 700px) {

  /* Sidebar → slide-up bottom sheet */
  #sidebar {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 68vh;
    max-height: calc(100vh - 56px);
    border-right: none;
    border-top: 2px solid #ffffff;
    transform: translateY(110%);
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 19;
    padding-bottom: env(safe-area-inset-bottom);
  }

  /* Drag handle above sidebar content */
  #sidebar::before {
    content: '';
    display: block;
    width: 36px;
    height: 3px;
    background: rgba(255,255,255,0.3);
    border-radius: 2px;
    margin: 10px auto 4px;
  }

  #sidebar.panel-open { transform: translateY(0); }

  /* Show panel-close button inside sidebar header */
  #panel-close {
    display: block;
    background: none;
    border: 1px solid rgba(255,255,255,0.4);
    color: #ffffff;
    font-size: 0.75em;
    cursor: pointer;
    padding: 2px 7px;
    line-height: 1.4;
    font-family: inherit;
    transition: background 0.15s, color 0.15s;
  }
  #panel-close:hover { background: #ffffff; color: #001F3F; }

  /* Show FAB + backdrop */
  #panel-fab      { display: block; }
  #panel-backdrop { display: block; opacity: 0; pointer-events: none;
                    transition: opacity 0.32s ease; }
  #panel-backdrop.visible { opacity: 1; pointer-events: all; }

  /* Main: full width */
  #main {
    margin-left: 0;
    width: 100vw;
  }

  /* Header: single-column, compact */
  #header {
    grid-template-columns: 1fr;
    min-height: 56px;
  }
  #title-block, #drawing-meta { display: none; }

  #header-center {
    padding: 0.45em 0.75em;
    border-left: none;
    border-right: none;
  }

  .field-label { display: none; }

  #input-row {
    gap: 0.4em;
  }

  #txid-input {
    font-size: 0.68em;
    padding: 0.55em 0.6em;
    min-width: 0;
  }

  #visualize-btn {
    font-size: 0.68em;
    padding: 0.55em 0.8em;
    flex-shrink: 0;
  }

  #status-msg { font-size: 0.65em; }

  /* Viz: fill all remaining space */
  #viz { flex: 1; min-height: 0; }

  /* Tooltip disabled on touch — hover doesn't work reliably */
  .tooltip { display: none !important; }

  /* Give sidebar sections a bit more room on small screens */
  #sidebar-content { padding-bottom: 1em; }
}

/* ─── Very small screens (≤ 380px) ──────────────────────────────── */
@media (max-width: 380px) {
  #txid-input { font-size: 0.6em; }
  #visualize-btn { font-size: 0.62em; letter-spacing: 0.1em; }
  #sidebar { height: 75vh; }
}