/* ============================================================
   PFD.CSS — Primary Flight Display instruments
   Airbus A350 authentic style
   Speed tape, attitude indicator, altitude tape, V/S, heading
   ============================================================ */

/* ============================================================
   PFD-SPECIFIC CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Layout */
  --pfd-width:   620px;    /* max-width shared by pfd-container, pfd-wrapper, heading-tape */
  --tape-bg:     #5A5B62;  /* grey background of speed / alt / VS tapes and heading band */
  --tape-height: 430px;    /* height of speed and altitude tapes — must match JS TAPE_HEIGHT */

  /* Z-index hierarchy (all values are in the pfd-container stacking context)
     2   .alt-tape             scrolling tape, creates local stacking context
     4   .attitude::after      ADI circular mask (box-shadow)
     5   .attitude::before     ADI side black borders
     6   .alt-tape-outer       clip-path creates stacking context — must be above attitude::before
     6   .vs-zero-bar          V/S amber zero reference bar (local to vspeed-strip)
     9   .alt-selected         selected altitude cursor (local to alt-tape-outer)
     10  .alt-box              current altitude readout box (local to alt-tape-outer)
     10  .alt-current-bar      current altitude amber bar (local to alt-tape-outer, DOM before alt-box)
     10  .speed-box            current speed amber lines (local to speed-tape)
     15  .tape-bottom-overlay  speed / QNH bottom overlays
     20  .l-marker             side L-markers
     20  .bank-arc-container   bank angle arc + pointer
     20  .heading-tape::after  heading cursor (amber bar)
     30  .fma-row              Flight Mode Annunciator (topmost)             */
}

/* ============================================================
   PFD CONTAINER — shared stacking root for pfd-wrapper + heading-tape-wrapper
   Allows .alt-bottom to be positioned above the heading tape background
   ============================================================ */
.pfd-container {
  position: relative;
  width: 100%;
  max-width: var(--pfd-width);
  margin: 0 auto;
}

/* ============================================================
   PFD WRAPPER
   ============================================================ */
.pfd-wrapper {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  width: 100%;
  max-width: var(--pfd-width);
  background: black;
  position: relative;
  border: 5px solid black;
  border-bottom: none;
  padding-top: 44px;
  padding-bottom: 40px;
}

/* ============================================================
   SPEED TAPE (left column)
   ============================================================ */
.speed-tape {
  width: 76px;
  height: var(--tape-height);
  background: linear-gradient(90deg, var(--tape-bg) 0%, var(--tape-bg) 65%, black 65%);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  border-top: 2px solid var(--white);
  margin-top: 25px;
}

/* Top mask removed — FMA row now covers this area */

.speed-tape .tape-track {
  position: absolute;
  left: 0; right: 0;
  top: 0;
}

.speed-tape .speed-tape-mark {
  position: absolute;
  left: 4px;
  width: 32px;
  text-align: right;
  font-size: 1rem;
  color: var(--white);
  line-height: 1;
}

.speed-tape .speed-tape-mark::after {
  content: '';
  position: absolute;
  right: -13px; top: 50%;
  transform: translateY(-50%);
  width: 10px; height: 1px;
  background: var(--white);
}

/* Minor tick marks on speed tape — no label, tick aligned with majors */
.speed-tape .speed-tape-mark-minor {
  font-size: 0;
  left: auto;
  right: 27px;
  width: 8px;
  height: 1px;
  background: var(--white);
}

.speed-tape .speed-tape-mark-minor::after {
  display: none;
}

/* Bottom overlay — covers bottom of tape, shows target values */
.tape-bottom-overlay {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  height: 52px;
  background: black;
  z-index: 15;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .15rem;
  pointer-events: none;
  border-top: 2px solid var(--white);
}

/* .alt-bottom is now a direct child of .pfd-container (not inside alt-tape-outer),
   so it paints above heading-tape-wrapper. Override the default left/right stretch
   with coordinates derived from fixed CSS dimensions:
     right = border-right(5) + vs-strip-outer(34) + alt-tape-outer margin-right(4) = 43px
     width = alt-tape width = 72px
     bottom = pfd-container height(493) - pfd-wrapper height(485) = 8px */
.pfd-container > .alt-bottom {
  left: auto;
  right: 43px;
  bottom: 48px; /* = 8px base + 40px pfd-wrapper padding-bottom */
  width: 72px;
}

.spd-target-label {
  font-size: 1.1rem;
  color: var(--green);
  letter-spacing: .06em;
}

.alt-target-label {
  font-size: 1.1rem;
  color: var(--magenta);
  letter-spacing: .06em;
}

.alt-qnh-label {
  font-size: .85rem;
  color: var(--accent);
  letter-spacing: .08em;
  border: 1px solid var(--amber);
  padding: .05rem .25rem;
}

/* Current speed box */
/* Current speed — two amber line segments with gap for text */
.speed-box {
  position: absolute;
  left: 0; right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  height: 2px;
  background: transparent;
  font-size: 0;
  pointer-events: none;
}

.speed-box::before {
  content: '';
  position: absolute;
  left: 0;
  width: 10px;
  height: 2px;
  background: var(--amber);
}

.speed-box::after {
  content: '';
  position: absolute;
  right: 0;
  width: 40px;
  height: 2px;
  background: var(--amber);
}

/* Selected speed bug — magenta outlined triangle (SVG), right side of tape */
.spd-selected {
  position: absolute;
  right: 5px;
  z-index: 9;
  transform: translateY(-12px);
}

/* Speed limit markers — double magenta ticks above and below target */
.spd-limit-upper,
.spd-limit-lower {
  position: absolute;
  right: 7px;
  height: 6px;
  z-index: 9;
  pointer-events: none;
}

.spd-limit-upper::before,
.spd-limit-upper::after,
.spd-limit-lower::before,
.spd-limit-lower::after {
  content: '';
  position: absolute;
  right: 0;
  width: 20px;
  height: 2px;
  background: var(--magenta);
}

.spd-limit-upper::before { top: 0; }
.spd-limit-upper::after  { top: 4px; }
.spd-limit-lower::before { top: 0; }
.spd-limit-lower::after  { top: 4px; }

/* VMO barber pole (above 340 kts) and stall barber pole (below 190 kts) —
   red/black horizontal stripe pattern, flush with grey zone right edge */
.spd-barber,
.spd-barber-low {
  position: absolute;
  left: 49px;
  width: 13px;
  z-index: 8;
  pointer-events: none;
  border-right: 1px solid var(--red);
  background: repeating-linear-gradient(
    180deg,
    var(--red) 0px,
    var(--red) 9px,
    black      9px,
    black      18px
  );
}

/* Speed trend arrow — amber vertical arrow with triangular tip */
.speed-trend {
  position: absolute;
  left: 36px;
  width: 2px;
  background: var(--amber);
  pointer-events: none;
  z-index: 9;
}

/* Arrowhead — triangular tip, flipped by JS via scaleY */
.speed-trend::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 7px solid var(--amber);
}

/* When arrow points up, tip at top */
.speed-trend.trend-up::after {
  top: 0;
  border-bottom: 7px solid var(--amber);
  border-top: none;
  transform: translateX(-50%) translateY(-7px);
}

/* When arrow points down, tip at bottom */
.speed-trend.trend-down::after {
  bottom: 0;
  border-top: 7px solid var(--amber);
  border-bottom: none;
  transform: translateX(-50%) translateY(7px);
}

/* ============================================================
   ATTITUDE INDICATOR (center)
   ============================================================ */
.attitude {
  flex: 1;
  height: 480px;
  position: relative;
  overflow: hidden;
  background: black;
}

/* Black side frames — mask left and right edges of the horizon */
.attitude::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  border-left: 18px solid black;
  border-right: 18px solid black;
}

/* Circular clipping mask — A350 style: large circle cropped on sides
   The circle is taller than the visible area, so the left/right edges
   get clipped by the attitude container's overflow:hidden */
.attitude::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 360px;
  height: 360px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  box-shadow: 0 0 0 300px black;
  z-index: 4;
  pointer-events: none;
}

/* Sky / Ground split — rotated by JS for bank */
.adi-horizon {
  position: absolute;
  inset: -60px;
  transform-origin: center center;
}

.adi-sky {
  position: absolute;
  left: 0; right: 0;
  top: 0;
  background: linear-gradient(180deg, #0a3a7a 0%, #1a70c0 100%);
}

.adi-ground {
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  background: linear-gradient(180deg, #8b3510 0%, #5a1e08 100%);
}

.adi-horizon-line {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--white);
  z-index: 2;
}

/* Vertical ticks on the ground side of the horizon line */
.adi-horizon-line::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 0; right: 0;
  height: 10px;
  background: repeating-linear-gradient(
    90deg,
    transparent 0px,
    transparent 38px,
    var(--white) 38px,
    var(--white) 40px
  );
}

/* Pitch ladder marks — white bars */
.pitch-ladder {
  position: absolute;
  left: 0; right: 0;
  top: 0; bottom: 0;
  z-index: 3;
  pointer-events: none;
}

.pitch-mark {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pitch-mark .bar {
  height: 1.5px;
  background: var(--white);
  opacity: .85;
}

.pitch-mark .bar-major { width: 50px; }
.pitch-mark .bar-minor { width: 25px; }

.pitch-mark .lbl {
  font-size: .72rem;
  color: var(--white);
  opacity: .85;
  width: 24px;
  text-align: center;
}

/* Flight Director — green cross centered on attitude indicator */
.flight-director {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  z-index: 15;
  pointer-events: none;
}

.fd-bar {
  position: absolute;
  background: var(--green);
}

.fd-horizontal {
  width: 120px;
  height: 3px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.fd-vertical {
  width: 3px;
  height: 120px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.fd-center-box {
  position: absolute;
  width: 10px;
  height: 10px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: black;
  border: 2px solid #D3C83B;
  z-index: 1;
}

/* Side L-markers — fixed lateral reference, black with amber border */
.l-marker {
  position: absolute;
  top: 50%;
  z-index: 20;
  pointer-events: none;
}

.l-marker-left {
  left: 80px;
  transform: translateY(calc(-25% + 6px));
}

.l-marker-right {
  right: 80px;
  transform: translateY(calc(-25% + 6px));
}

/* Fixed aircraft symbol — amber/yellow like A350 */
.aircraft-symbol {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  z-index: 20;
  pointer-events: none;
}

.aircraft-symbol svg {
  overflow: visible;
}

/* Bank angle arc container — centered on attitude, circle top
   top: 45px = ADI center y (240) − SVG cy (195); keeps ticks aligned outside the ADI circle */
.bank-arc-container {
  position: absolute;
  left: 50%;
  top: 45px;
  transform: translateX(-50%);
  width: 360px;
  height: 205px;
  z-index: 20;
  pointer-events: none;
}

.bank-arc-svg {
  position: absolute;
  top: 0; left: 0;
}

.bank-pointer-shape {
  position: absolute;
  top: 0; left: 0;
  transform-origin: 180px 195px; /* rotation pivot = SVG arc center (cx=180, cy=195) */
}

/* Flight mode annunciator row — spans full PFD width, above instruments */
.fma-row {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  background: black;
  font-size: .82rem;
  letter-spacing: .08em;
  z-index: 30;
  height: 44px;
}

.fma-cell {
  text-align: center;
  flex: 1;
  border-right: 2px solid #555;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: .1rem .15rem;
  gap: 0;
  min-width: 0;
}

.fma-cell:last-child { border-right: none; }

/* Bottom-aligned variant (Cell 4 — BARO/QNH) */
.fma-cell.fma-cell-bottom {
  justify-content: flex-end;
  padding-bottom: .2rem;
}

/* Individual text lines inside FMA cells */
.fma-line {
  display: block;
  font-size: .78rem;
  line-height: 1.15;
  letter-spacing: .08em;
  white-space: nowrap;
}

/* Color classes — two-class specificity is sufficient, no !important needed */
.fma-row .fma-green   { color: var(--green); }
.fma-row .fma-white   { color: var(--white); }
.fma-row .fma-magenta { color: var(--magenta); }
.fma-row .fma-cyan    { color: var(--accent); }

/* ============================================================
   ALTITUDE TAPE (right column)
   ============================================================ */

/* Outer wrapper — clip-path clips cursor vertically to tape bounds while allowing
   left protrusion for the amber bar and cursor; z-index:6 compensates for the
   stacking context created by clip-path (must stay above attitude::before z:5) */
.alt-tape-outer {
  position: relative;
  flex-shrink: 0;
  margin-top: 25px;
  margin-right: 4px;
  z-index: 6;
  clip-path: inset(0 0 0 -20px);
}

.alt-tape {
  width: 72px;
  height: var(--tape-height);
  background: linear-gradient(90deg, var(--tape-bg) 0%, var(--tape-bg) 65%, black 65%);
  border-top: 2px solid var(--white);
  position: relative;
  overflow: hidden;
  z-index: 2; /* creates stacking context: above bar (z-index 1), below alt-box (z-index 10) */
}

.alt-tape .alt-tape-mark {
  position: absolute;
  left: 4px;
  font-size: .82rem;
  color: var(--white);
  line-height: 1;
}

/* Tick aligned to right edge of grey zone (65% × 72px ≈ 47px from tape left)
   mark starts at left:4px → left:35px on ::after gives right edge at 4+35+8 = 47px */
.alt-tape .alt-tape-mark::after {
  content: '';
  position: absolute;
  left: 35px; top: 50%;
  transform: translateY(-50%);
  width: 8px; height: 1px;
  background: var(--white);
}

/* Minor tick marks — right edge at 39+8 = 47px, aligned with grey zone boundary */
.alt-tape .alt-tape-mark-minor {
  font-size: 0;
  left: 39px;
  width: 8px;
  height: 1px;
  background: var(--white);
}

.alt-tape .alt-tape-mark-minor::after,
.alt-tape .alt-tape-mark-minor::before {
  display: none;
}

/* Current altitude box */
.alt-box {
  position: absolute;
  left: 0; right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: black;
  border: 1.5px solid var(--amber);
  text-align: center;
  padding: .2rem .2rem;
  pointer-events: none;
}

.alt-box::before {
  display: none;
}

.alt-box .alt-hundreds {
  font-size: 1rem;
  color: var(--green);
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1;
}

/* Amber bar at the current altitude.
   z-index: 10 → above attitude::before black mask (z-index 5) and alt-tape (z-index 2).
   alt-box also has z-index 10 but comes later in DOM, so alt-box paints on top of the bar.
   Extends 8px left toward ADI + 8px visible on the grey tape edge. */
.alt-current-bar {
  position: absolute;
  left: -16px;
  width: 24px;
  top: 50%;
  transform: translateY(-50%);
  height: 2px;
  background: var(--amber);
  z-index: 10;
  pointer-events: none;
}

/* Selected altitude cursor — lives in alt-tape-outer (no overflow:hidden) so it can
   extend left of the tape; left:-8px gives ~8px of visible protrusion */
.alt-selected {
  position: absolute;
  left: -8px;
  width: 40px;
  height: 80px;
  background: url('../gfx/alt_cursor.png') no-repeat center / contain;
  transform: translateY(-50%);
  z-index: 9;
  pointer-events: none;
}

/* ============================================================
   VERTICAL SPEED (far right strip)
   ============================================================ */

/* Outer wrapper — flex item, no overflow clipping, so zero bar can extend left toward alt-tape */
.vs-strip-outer {
  position: relative;
  flex-shrink: 0;
  margin-top: 26px; /* moved from .vspeed-strip */
}

.vspeed-strip {
  width: 34px;
  height: 420px;
  background: var(--tape-bg);
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 10px 0, 34px 30px, 34px 390px, 10px 420px, 0 420px);
}

.vspeed-scale {
  position: absolute;
  top: 0; bottom: 0; left: 0; right: 0;
}

.vspeed-mark {
  position: absolute;
  left: 2px;
  font-size: .82rem;
  color: var(--white);
  line-height: 1;
  transform: translateY(-50%);
}

.vspeed-mark::after {
  content: '';
  position: absolute;
  right: -9px; top: 50%;
  transform: translateY(-50%);
  width: 8px; height: 6px;
  background: var(--white);
}

.vspeed-mark-minor {
  position: absolute;
  left: 13px;
  width: 5px; height: 2px;
  background: var(--white);
  transform: translateY(-50%);
}

/* Amber bar at zero V/S — inside vspeed-strip, left portion only (clear of "0" label at right). */
.vs-zero-bar {
  position: absolute;
  left: 0;
  width: 18px;
  top: 214px;
  height: 2px;
  background: var(--amber);
  z-index: 6; /* above needle (z-index 5) */
  pointer-events: none;
}

/* Pivoting needle — pivot hidden off-right, only tip visible in strip */
.vspeed-needle {
  position: absolute;
  right: -60px;
  top: 214px;
  width: 100px;
  height: 3px;
  background: var(--green);
  transform-origin: right center;
  transform: rotate(0deg);
  z-index: 5;
  border-radius: 1px 0 0 1px;
}

.vspeed-value {
  position: absolute;
  left: 2px;
  transform: translateY(-50%);
  font-size: .55rem;
  color: var(--green);
  letter-spacing: .04em;
  background-color: black;
  white-space: nowrap;
  pointer-events: none;
  z-index: 7; /* above needle (z-index 5) and vs-zero-bar (z-index 6) */
}

/* ============================================================
   HEADING TAPE (below PFD)
   ============================================================ */
.heading-tape-wrapper {
  width: 100%;
  max-width: var(--pfd-width);
  height: 40px;
  background: black;
  position: relative;
  margin-top: -2rem; /* collapse the main gap between PFD and heading tape */
  border: 5px solid black;
  border-top: none;
}

/* Gray band aligned on the ADI column — black margins match speed tape (76px left)
   and alt tape + V/S strip (110px right) */
.heading-tape-inner {
  position: absolute;
  top: 0; bottom: 0;
  left: 76px; right: 110px;
  background: var(--tape-bg);
  overflow: hidden;
  border-top: 1px solid var(--white);
  border-left: 1px solid var(--white);
  border-right: 1px solid var(--white);
}

.heading-track {
  position: absolute;
  top: 0; bottom: 0;
  display: flex;
  align-items: stretch;
}

.hdg-mark {
  position: relative;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
  height: 100%;
}

.hdg-mark .hdg-tick {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  background: var(--white);
}

.hdg-mark .hdg-label {
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  font-size: .75rem;
  color: var(--white);
  white-space: nowrap;
}

/* Center cursor — amber vertical bar, overflows above the band */
.heading-tape-wrapper::after {
  content: '';
  position: absolute;
  top: -14px;
  left: calc(50% - 17px);
  transform: translateX(-50%);
  width: 3px;
  height: 25px;
  background: var(--amber);
  z-index: 20;
}

/* Target heading diamond */
.hdg-diamond {
  position: absolute;
  top: 2px;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--green);
  background: transparent;
  transform: translateX(-50%) rotate(45deg);
  z-index: 10;
  pointer-events: none;
}

/* ============================================================
   RESPONSIVE — mobile adjustments
   ============================================================ */
@media (max-width: 640px) {
  /* Item 6: spread L-markers apart on mobile */
  .l-marker-left {
    left: 30px;
  }
  .l-marker-right {
    right: 30px;
  }
}