/* ── Diagram System ───────────────────────────────────────────────────────── */

.dia-wrap {
  margin: 2rem 0;
  border-top: 2px solid #3a0000;
  padding-top: 16px;
}

.dia-title {
  display: block;
  width: fit-content;
  margin-bottom: 16px;
  padding: 3px 10px 3px 8px;
  background: #110000;
  border: 1px solid #5a0000;
  border-left: 3px solid #cc2200;
  color: #cc4444;
  font-family: "Fixedsys500c", monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* ── Chain (vertical flow) ────────────────────────────────────────────────── */

.dia-chain {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  width: 100%;
}

/* Vertical spine behind chain nodes */
.dia-chain::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(
    180deg,
    transparent 0%,
    #220000 8%,
    #220000 92%,
    transparent 100%
  );
  transform: translateX(-50%);
  pointer-events: none;
}

.dia-chain--h {
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
}

.dia-chain--h::before {
  display: none;
}

/* ── Node ─────────────────────────────────────────────────────────────────── */

.dia-node {
  position: relative;
  z-index: 1;
  width: 100%;
  min-width: 0;
  max-width: 500px;
  box-sizing: border-box;
  padding: 11px 18px 11px 22px;
  background: #060000;
  border: 1px solid #5a0000;
  border-left: 4px solid #5a0000;
  box-shadow: 4px 4px 0 #1c0000;
  text-align: left;
  /* Static scanline texture — not animated */
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.008) 3px,
    rgba(255, 255, 255, 0.008) 4px
  );
}

.dia-node__label {
  display: block;
  color: #ff9090;
  font-family: "Fixedsys500c", monospace;
  font-size: 0.83rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.3;
  overflow-wrap: break-word;
  word-break: break-word;
}

.dia-node__sub {
  display: block;
  margin-top: 5px;
  padding-top: 5px;
  border-top: 1px solid #1a0000;
  color: #664444;
  font-family: "Fixedsys500c", monospace;
  font-size: 0.65rem;
  line-height: 1.5;
  letter-spacing: 0.02em;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* ── Node Variants — left border accent ────────────────────────────────────── */

.dia-node--fw {
  border-left-color: #cc9900;
  box-shadow: 4px 4px 0 #1a1400;
  background-color: #050200;
}
.dia-node--fw .dia-node__label { color: #cc9900; }
.dia-node--fw .dia-node__sub   { color: #665500; border-top-color: #1a1000; }

.dia-node--win {
  border-left-color: #cc2200;
  box-shadow: 4px 4px 0 #2a0000;
}
.dia-node--win .dia-node__label { color: #ff6060; }

.dia-node--kernel {
  border-left-color: #ff3300;
  border-color: #880000;
  border-left-color: #ff3300;
  box-shadow: 4px 4px 0 #3a0000;
  background-color: #080000;
}
.dia-node--kernel .dia-node__label { color: #ff3300; }

.dia-node--dim {
  border-color: #262626;
  border-left-color: #404040;
  box-shadow: 4px 4px 0 #111111;
  opacity: 0.5;
}
.dia-node--dim .dia-node__label { color: #606060; }
.dia-node--dim .dia-node__sub   { color: #3a3a3a; border-top-color: #1c1c1c; }

/* Hook node — glowing outer ring via ::after (opacity only — compositor-safe) */
.dia-node--hook {
  border-color: #882200;
  border-left-color: #ff4400;
  box-shadow: 4px 4px 0 #3a0000;
  background-color: #070000;
}
.dia-node--hook .dia-node__label { color: #ff5500; }

.dia-node--hook::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 1px solid #ff3300;
  opacity: 0;
  pointer-events: none;
  animation: dia-hook-glow 1.8s ease-in-out infinite;
}

/* ── Arrow Connector ──────────────────────────────────────────────────────── */

.dia-arrow {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0;
  gap: 0;
}

.dia-arrow__line {
  width: 2px;
  height: 22px;
  background: linear-gradient(180deg, #3a0000 0%, #5a0000 100%);
}

.dia-arrow__head {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid #5a0000;
}

.dia-arrow__label {
  margin-top: 4px;
  padding: 2px 8px;
  background: #0a0000;
  border: 1px solid #2a0000;
  color: #664444;
  font-family: "Fixedsys500c", monospace;
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-align: center;
  max-width: 280px;
}

/* ── Memory / Table Layout ────────────────────────────────────────────────── */

.dia-mem {
  display: block;
  width: 100%;
  max-width: 600px;
  border: 1px solid #5a0000;
  border-left: 3px solid #880000;
  box-shadow: 4px 4px 0 #1c0000;
  background: #040000;
  font-family: "Fixedsys500c", monospace;
}

.dia-mem__row {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  border-bottom: 1px solid #1a0000;
}

.dia-mem__row:last-child {
  border-bottom: none;
}

/* Zebra striping on data rows */
.dia-mem__row:nth-child(even):not(.dia-mem__row--header) {
  background: #060000;
}

.dia-mem__row--header {
  background: linear-gradient(90deg, #1c0000 0%, #0c0000 100%);
  border-bottom: 2px solid #4a0000;
}

.dia-mem__row--header .dia-mem__addr,
.dia-mem__row--header .dia-mem__name,
.dia-mem__row--header .dia-mem__val {
  color: #cc4444;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 7px 10px;
}

.dia-mem__row--highlight .dia-mem__name {
  color: #ccaa00;
}

.dia-mem__row--highlight .dia-mem__addr {
  color: #886600;
}

.dia-mem__addr {
  padding: 6px 10px 6px 12px;
  color: #664444;
  font-size: 0.64rem;
  border-right: 1px solid #200000;
  white-space: normal;
  word-break: break-word;
  line-height: 1.4;
}

.dia-mem__name {
  padding: 6px 10px;
  color: #ff8080;
  font-size: 0.71rem;
  border-right: 1px solid #1a0000;
  line-height: 1.4;
}

.dia-mem__val {
  padding: 6px 10px;
  color: #884444;
  font-size: 0.67rem;
  line-height: 1.4;
}

/* ── Keyframes ────────────────────────────────────────────────────────────── */

@keyframes dia-hook-glow {
  0%, 100% { opacity: 0; }
  50%       { opacity: 0.65; }
}

/* ── Mobile ───────────────────────────────────────────────────────────────── */

@media (max-width: 767px) {
  .dia-node {
    min-width: 200px;
    max-width: 100%;
    padding: 10px 14px 10px 18px;
  }

  .dia-mem {
    max-width: 100%;
  }

  .dia-mem__row {
    grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr);
  }

  .dia-mem__val {
    display: none;
  }
}