/* ================================================================
   MECHANICAL.CSS — Sagar Patel Portfolio
   Industrial Machine Theme Overlay
   Gears · Control Panels · Conveyors · CNC · Robot Arms
   ================================================================ */

/* ── Mechanical Cursor (Crosshair + Gear ring) ── */
.mech-cursor-cross {
  position: fixed;
  pointer-events: none;
  z-index: 99999;
  width: 20px; height: 20px;
  transform: translate(-50%,-50%);
  transition: none;
}
.mech-cursor-cross::before,
.mech-cursor-cross::after {
  content: '';
  position: absolute;
  background: var(--orange-hi);
  box-shadow: 0 0 6px var(--orange);
}
.mech-cursor-cross::before { width: 1px; height: 20px; left: 50%; top: 0; transform: translateX(-50%); }
.mech-cursor-cross::after  { width: 20px; height: 1px; top: 50%; left: 0; transform: translateY(-50%); }

.mech-cursor-gear {
  position: fixed;
  pointer-events: none;
  z-index: 99998;
  width: 40px; height: 40px;
  transform: translate(-50%,-50%);
  transition: transform 0.08s linear;
  animation: gearSpin 2s linear infinite;
  opacity: 0.6;
}
.mech-cursor-gear.hover-gear { animation-play-state: paused; opacity: 1; }
.mech-cursor-gear svg { width: 100%; height: 100%; }

@keyframes gearSpin { from { transform: translate(-50%,-50%) rotate(0deg); } to { transform: translate(-50%,-50%) rotate(360deg); } }

/* ── Gear Navigation Buttons ── */
.mech-nav-buttons {
  position: fixed;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 800;
}

.mech-btn-up, .mech-btn-dn {
  width: 52px; height: 52px;
  border-radius: 50%;
  border: 2px solid;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 900;
  transition: all 0.1s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 3px 3px 0 rgba(0,0,0,0.5);
  background: rgba(10,14,26,0.85);
}
.mech-btn-up {
  border-color: var(--red);
  color: var(--red-hi);
  box-shadow: 0 0 12px rgba(230,57,70,0.3), 3px 3px 0 var(--red-lo);
}
.mech-btn-up:hover { background: rgba(230,57,70,0.2); transform: translate(-1px,-1px); box-shadow: 0 0 20px rgba(230,57,70,0.5), 4px 4px 0 var(--red-lo); }
.mech-btn-up:active { transform: translate(2px,2px) !important; box-shadow: 1px 1px 0 var(--red-lo) !important; }
.mech-btn-dn {
  border-color: var(--green);
  color: var(--green-hi);
  box-shadow: 0 0 12px rgba(6,214,160,0.3), 3px 3px 0 #038f6b;
}
.mech-btn-dn:hover { background: rgba(6,214,160,0.15); transform: translate(-1px,-1px); box-shadow: 0 0 20px rgba(6,214,160,0.5), 4px 4px 0 #038f6b; }
.mech-btn-dn:active { transform: translate(2px,2px) !important; box-shadow: 1px 1px 0 #038f6b !important; }

/* Stepper motor ring on nav buttons */
.mech-btn-up::after, .mech-btn-dn::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  border: 1px dashed currentColor;
  opacity: 0.3;
  animation: gearSpin 4s linear infinite;
}

.nav-indicator {
  width: 52px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  padding: 0.2rem 0;
  background: rgba(10,14,26,0.7);
  border: 1px solid var(--border);
  border-radius: 2px;
}

/* ── Gear decorations (rotating) ── */
.gear-deco {
  position: absolute;
  pointer-events: none;
  opacity: 0.08;
  animation: gearSpin linear infinite;
  z-index: 0;
}
.gear-deco.cw  { animation-direction: normal; }
.gear-deco.ccw { animation-direction: reverse; }

/* ── Control Panel Section (hero overlay aesthetic) ── */
.control-panel-hud {
  position: absolute;
  bottom: 1.5rem;
  left: 0;
  right: 0;
  z-index: 10;
  pointer-events: none;
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 0 var(--content-pad);
}
.hud-panel {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem;
  background: rgba(7,3,15,0.8);
  border: 1px solid rgba(255,215,0,0.2);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  backdrop-filter: blur(8px);
}
.hud-indicator {
  width: 8px; height: 8px;
  border-radius: 0;
  transform: rotate(45deg);
}
.hud-indicator.red   { background: var(--red);   box-shadow: 0 0 6px var(--red);   animation: blinkLight 1.2s step-end infinite; }
.hud-indicator.green { background: var(--green); box-shadow: 0 0 6px var(--green); }
.hud-indicator.yel   { background: var(--yellow);box-shadow: 0 0 6px var(--yellow);animation: blinkLight 0.8s step-end infinite 0.4s; }
@keyframes blinkLight { 0%,100%{opacity:1}50%{opacity:0.15} }

/* ── Gear shift page transition overlay ── */
.gear-shift-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(7,3,15,0);
  transition: background 0.2s;
}
.gear-shift-overlay.active {
  pointer-events: all;
  background: rgba(7,3,15,0.85);
}
.gear-shift-ring {
  width: 200px; height: 200px;
  border: 3px solid var(--yellow);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.25s, transform 0.25s;
}
.gear-shift-overlay.active .gear-shift-ring {
  opacity: 1;
  transform: scale(1);
  animation: gearSpin 0.5s linear infinite;
}
.gear-shift-text {
  font-family: var(--font-pixel);
  font-size: 0.5rem;
  color: var(--yellow);
  letter-spacing: 0.15em;
  position: absolute;
  bottom: -2rem;
  white-space: nowrap;
  text-shadow: var(--glow-yellow);
}

/* ── Industrial section header ── */
.mech-section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  padding: 0.75rem 1.25rem;
  background: rgba(10,14,26,0.6);
  border-left: 3px solid var(--orange);
  border-bottom: 1px solid var(--border);
  position: relative;
}
.mech-section-header::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 60%;
  background: linear-gradient(to left, rgba(244,129,31,0.04), transparent);
  pointer-events: none;
}
.mech-sh-num {
  font-family: var(--font-pixel);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--orange);
  opacity: 0.25;
  line-height: 1;
  letter-spacing: 0.05em;
}
.mech-sh-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--orange-hi);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 0.1rem;
}
.mech-sh-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  background: linear-gradient(90deg, var(--orange-hi), var(--yellow-hi));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── CONVEYOR BELT component ── */
.conveyor-wrap {
  position: relative;
  overflow: hidden;
  padding: 2rem 0;
}
.conveyor-track {
  position: relative;
  height: 60px;
  margin: 1rem 0;
}
.conveyor-belt {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 18px;
  background: repeating-linear-gradient(
    90deg,
    rgba(69,123,189,0.3) 0px,
    rgba(69,123,189,0.3) 20px,
    rgba(69,123,189,0.1) 20px,
    rgba(69,123,189,0.1) 24px
  );
  border-top: 2px solid rgba(69,123,189,0.5);
  border-bottom: 2px solid rgba(69,123,189,0.5);
  animation: beltMove 2s linear infinite;
}
@keyframes beltMove {
  from { background-position: 0 0; }
  to   { background-position: -48px 0; }
}

.conveyor-roller {
  position: absolute;
  bottom: 0;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #5a6a8a, #2a3050);
  border: 2px solid rgba(69,123,189,0.6);
  box-shadow: 0 0 8px rgba(69,123,189,0.3);
}
.conveyor-roller::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: rgba(69,123,189,0.2);
  animation: gearSpin 0.8s linear infinite;
  border-top: 1px solid rgba(69,123,189,0.5);
}

.conveyor-items {
  position: absolute;
  bottom: 18px;
  left: 0;
  display: flex;
  gap: 1.5rem;
  animation: conveyorSlide 12s linear infinite;
  white-space: nowrap;
}
@keyframes conveyorSlide {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.conveyor-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hi));
  border: 1px solid var(--border);
  border-bottom: 3px solid var(--blue);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  min-width: 90px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.4);
  transition: all 0.2s;
  cursor: default;
  flex-shrink: 0;
}
.conveyor-item:hover {
  border-color: var(--blue-hi);
  color: var(--blue-hi);
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(69,123,189,0.3), var(--glow-blue);
}
.conveyor-item .ci-icon { font-size: 1.4rem; }
.conveyor-item .ci-name { color: var(--text); font-size: 0.62rem; font-family: var(--font-display); letter-spacing: 0.06em; }
.conveyor-item .ci-lvl { color: var(--yellow); font-size: 0.5rem; }

/* ── CNC ENGRAVING ANIMATION ── */
.cnc-display {
  position: relative;
  overflow: hidden;
  background: rgba(5,8,16,0.9);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 2rem;
}
.cnc-display::before {
  content: 'CNC_MILL_V3 // STATUS: ENGRAVING';
  position: absolute;
  top: 0.5rem; left: 1rem;
  font-family: var(--font-mono);
  font-size: 0.52rem;
  color: var(--green);
  letter-spacing: 0.12em;
}
.cnc-spindle {
  position: absolute;
  width: 6px; height: 30px;
  background: linear-gradient(to bottom, var(--orange-hi), var(--orange));
  border-radius: 1px;
  top: 0;
  box-shadow: 0 0 10px var(--orange);
  transform-origin: top center;
  animation: cncMove 4s ease-in-out infinite;
  z-index: 5;
}
@keyframes cncMove {
  0%   { left: 10%;  top: 0;  }
  20%  { left: 30%;  top: 20px; }
  40%  { left: 55%;  top: 10px; }
  60%  { left: 70%;  top: 30px; }
  80%  { left: 85%;  top: 5px;  }
  100% { left: 10%;  top: 0;   }
}

/* ── ROBOT ARM SVG ANIMATION ── */
.robot-arm-wrap {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  padding: 1rem 0;
  position: relative;
}
.robot-arm-svg {
  width: 100%;
  max-width: 500px;
}

/* robot joint animations */
@keyframes armSway {
  0%,100% { transform: rotate(-15deg); }
  50%      { transform: rotate(15deg);  }
}
@keyframes forearmBend {
  0%,100% { transform: rotate(20deg);  }
  50%      { transform: rotate(-30deg); }
}
@keyframes wristTwist {
  0%,100% { transform: rotate(-10deg); }
  50%      { transform: rotate(20deg);  }
}
@keyframes gripOpen {
  0%,100% { transform: scaleX(1); }
  50%      { transform: scaleX(0.6); }
}

.arm-base     { transform-origin: 50% 100%; }
.arm-shoulder { transform-origin: 50% 0%; animation: armSway 4s ease-in-out infinite; }
.arm-forearm  { transform-origin: 0% 0%;   animation: forearmBend 4s ease-in-out infinite 0.3s; }
.arm-wrist    { transform-origin: 0% 50%;  animation: wristTwist 2s ease-in-out infinite 0.6s; }
.arm-gripper  { transform-origin: 50% 0%;  animation: gripOpen 2s ease-in-out infinite 1s; }

/* Data block being picked by arm */
.data-block {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text);
  background: var(--bg-card);
  box-shadow: 2px 2px 0 rgba(0,0,0,0.5);
  animation: blockFloat 3s ease-in-out infinite;
}
@keyframes blockFloat {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* ── CONTROL PANEL UI ── */
.ctrl-panel {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(5,8,16,0.85);
  border: 2px solid rgba(255,215,0,0.15);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.ctrl-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 30px,
    rgba(255,215,0,0.02) 30px,
    rgba(255,215,0,0.02) 31px
  );
  pointer-events: none;
}

.ctrl-switch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem;
  background: rgba(15,25,45,0.8);
  border: 1px solid rgba(69,123,189,0.3);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}
.ctrl-switch:hover { border-color: var(--blue-hi); background: rgba(69,123,189,0.08); }
.ctrl-switch.active { border-color: var(--green); background: rgba(6,214,160,0.05); }

.toggle-switch {
  width: 36px; height: 60px;
  background: rgba(10,14,26,0.9);
  border: 2px solid rgba(69,123,189,0.4);
  border-radius: 3px;
  display: flex; align-items: flex-end; justify-content: center;
  padding: 3px;
  position: relative;
  transition: border-color 0.2s;
}
.toggle-switch.on { border-color: var(--green); }
.toggle-switch.on .toggle-handle { transform: translateY(calc(-100% - 6px)); background: var(--green); box-shadow: 0 0 10px var(--green); }
.toggle-switch.off .toggle-handle { background: var(--red); }

.toggle-handle {
  width: 20px; height: 22px;
  border-radius: 2px;
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), background 0.2s, box-shadow 0.2s;
}

.indicator-light {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
  animation: blinkLight 1.5s step-end infinite;
}
.indicator-light.on { background: var(--green); box-shadow: 0 0 8px var(--green); animation: none; }

.ctrl-label {
  font-family: var(--font-mono);
  font-size: 0.52rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-align: center;
}

/* ── STEPPER MOTOR PROGRESS ── */
.stepper-motor {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: rgba(10,14,26,0.6);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-muted);
}
.stepper-gear-icon {
  width: 20px; height: 20px;
  animation: gearSpin 0.5s linear infinite;
  flex-shrink: 0;
  opacity: 0.7;
}
.stepper-bar {
  flex: 1;
  height: 4px;
  background: rgba(69,123,189,0.15);
  border-radius: 0;
  overflow: hidden;
  position: relative;
}
.stepper-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--violet));
  box-shadow: 0 0 6px rgba(69,123,189,0.5);
  transition: width 0.4s ease;
  position: relative;
}
.stepper-fill::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 3px;
  background: white;
  opacity: 0.8;
}

/* ── PRECISION GRID / tick marks ── */
.precision-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image:
    linear-gradient(var(--blue-hi) 1px, transparent 1px),
    linear-gradient(90deg, var(--blue-hi) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: 0;
}
.precision-grid.dense {
  background-size: 20px 20px;
}

/* ── Scan line effect on sections ── */
.mech-scan {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(6,214,160,0.4) 50%, transparent 100%);
  pointer-events: none;
  z-index: 1;
  animation: scanLine 3s linear infinite;
}
@keyframes scanLine {
  from { top: 0%; opacity: 1; }
  to   { top: 100%; opacity: 0; }
}

/* ── Mechanical corner brackets ── */
.mech-corner {
  position: absolute;
  width: 20px; height: 20px;
  pointer-events: none;
}
.mech-corner.tl { top: 0; left: 0; border-top: 2px solid var(--orange); border-left: 2px solid var(--orange); }
.mech-corner.tr { top: 0; right: 0; border-top: 2px solid var(--orange); border-right: 2px solid var(--orange); }
.mech-corner.bl { bottom: 0; left: 0; border-bottom: 2px solid var(--orange); border-left: 2px solid var(--orange); }
.mech-corner.br { bottom: 0; right: 0; border-bottom: 2px solid var(--orange); border-right: 2px solid var(--orange); }

/* ── Mechanical Ticker / Odometer ── */
.odometer {
  display: inline-flex;
  gap: 2px;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  padding: 0.3rem 0.6rem;
  background: rgba(5,8,16,0.9);
  border: 2px solid rgba(255,215,0,0.3);
  border-radius: 2px;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
}
.odo-digit {
  width: 1.2ch;
  text-align: center;
  color: var(--yellow);
  text-shadow: var(--glow-yellow);
  line-height: 1;
}

/* ── Axis indicator HUD ── */
.axis-hud {
  display: inline-flex;
  gap: 0.8rem;
  padding: 0.4rem 0.8rem;
  background: rgba(5,8,16,0.85);
  border: 1px solid rgba(6,214,160,0.2);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.55rem;
}
.axis-hud .ax { display: flex; align-items: center; gap: 0.3rem; }
.axis-hud .ax-label { color: var(--text-muted); }
.axis-hud .ax-val { color: var(--green-hi); letter-spacing: 0.05em; }
.axis-hud .x-val { color: var(--red-hi); }
.axis-hud .y-val { color: var(--green-hi); }
.axis-hud .z-val { color: var(--blue-hi); }

/* ── VEHICLE ASSEMBLY (Contact page) ── */
.assembly-stage {
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.assembly-part {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  opacity: 0;
  transition: all 0.6s cubic-bezier(0.34,1.56,0.64,1);
}
.assembly-part.assembled {
  opacity: 1;
}
.assembly-part .ap-icon { font-size: 1.6rem; }
.assembly-part .ap-label { color: var(--blue-hi); font-size: 0.5rem; letter-spacing: 0.1em; }

/* ── Progress indicator bar (section nav) ── */
.mech-progress-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 900;
  background: rgba(255,215,0,0.08);
}
.mech-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--red), var(--orange), var(--yellow));
  box-shadow: 0 0 8px var(--yellow);
  transition: width 0.3s ease;
}

/* ── Bolt/rivet decorations ── */
.bolt {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.3), rgba(80,90,120,0.8));
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

/* ── Fluid level indicator ── */
.fluid-gauge {
  width: 20px;
  height: 80px;
  background: rgba(5,8,16,0.8);
  border: 2px solid rgba(69,123,189,0.4);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  display: inline-block;
}
.fluid-level {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, var(--blue), var(--violet));
  opacity: 0.7;
  transition: height 1s ease;
}
.fluid-gauge::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 8px,
    rgba(255,255,255,0.05) 8px,
    rgba(255,255,255,0.05) 9px
  );
}

/* ── SKILL XP BAR (mechanical piston style) ── */
.piston-bar {
  position: relative;
  height: 22px;
  background: rgba(10,14,26,0.7);
  border: 1px solid rgba(69,123,189,0.3);
  border-radius: 1px;
  overflow: visible;
  margin: 0.5rem 0;
}
.piston-track {
  position: absolute;
  inset: 2px;
  background: rgba(5,8,16,0.5);
  overflow: hidden;
}
.piston-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue-lo), var(--blue), var(--blue-hi));
  box-shadow: 0 0 8px rgba(69,123,189,0.5);
  transition: width 1.5s cubic-bezier(0.4,0,0.2,1);
  width: 0%;
  position: relative;
}
.piston-fill::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 8px;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.4), transparent);
  animation: pistonShine 2s ease-in-out infinite;
}
@keyframes pistonShine {
  0%,100% { opacity: 0.4; }
  50% { opacity: 1; }
}
.piston-head {
  position: absolute;
  right: 0; top: -3px; bottom: -3px;
  width: 6px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.2), var(--orange));
  border: 1px solid var(--orange-hi);
  border-radius: 1px;
  box-shadow: 0 0 6px var(--orange), 2px 0 0 rgba(0,0,0,0.5);
}

/* ── Responsive / mobile ── */
@media (max-width: 900px) {
  .mech-nav-buttons { display: none; }
  .control-panel-hud { display: none; }
  .mech-progress-bar { display: none; }
}