/* RECHARGE · Vertical Electro-Magnetometer intro */

.engine-intro {
  position: fixed;
  inset: 0;
  z-index: 20000;
  background-color: var(--bg-void);
  background-image:
    radial-gradient(circle at 50% 45%, #15181c 0%, #000 100%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 40px);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
  font-family: var(--font-ui);
  color: var(--text-main);
}

body.engine-intro-active {
  overflow: hidden;
}

body.engine-intro-active #site-main,
body.engine-intro-active .site-nav {
  visibility: hidden;
}

body.engine-intro-done #site-main,
body.engine-intro-done .site-nav {
  visibility: visible;
}

.engine-intro.is-complete {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.55s ease;
}

.engine-intro.is-hidden {
  display: none;
}

.engine-intro__skip {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 20100;
  background: var(--hw-panel);
  border: 3px solid #111;
  color: var(--text-muted);
  font-family: var(--font-data);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 8px 12px;
  cursor: pointer;
  clip-path: var(--chamfer-sm);
  box-shadow: 0 4px 0 #000;
}

.engine-intro__skip:active {
  transform: translateY(4px);
  box-shadow: none;
}

/* Device shell */
.em-device {
  width: 100%;
  max-width: 420px;
  height: min(90vh, 780px);
  background: var(--hw-dark);
  border: 8px solid #000;
  clip-path: var(--chamfer-lg);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px;
  position: relative;
  box-shadow:
    0 40px 100px rgba(0, 0, 0, 0.9),
    inset 0 2px 10px rgba(255, 255, 255, 0.06);
  transition: transform 0.05s linear;
}

.em-device.is-shaking {
  animation: emShake 0.18s infinite;
}

@keyframes emShake {
  25% { transform: translate(-2px, 1px) rotate(-0.3deg); }
  75% { transform: translate(2px, -1px) rotate(0.3deg); }
}

.em-screw {
  position: absolute;
  width: 14px;
  height: 14px;
  background: #111;
  border-radius: 50%;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.9);
  z-index: 2;
}

.em-screw::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: #050608;
  border-radius: 50%;
}

.em-screw--tl { top: 10px; left: 10px; }
.em-screw--tr { top: 10px; right: 10px; }
.em-screw--bl { bottom: 10px; left: 10px; }
.em-screw--br { bottom: 10px; right: 10px; }

.em-header {
  text-align: center;
  border-bottom: 2px solid var(--hw-grey);
  padding-bottom: 10px;
  flex-shrink: 0;
}

.em-brand {
  font-family: var(--font-macro);
  font-size: 2.25rem;
  color: #fff;
  line-height: 1;
  letter-spacing: 2px;
  text-shadow: 0 2px 4px #000;
}

.em-brand span {
  color: var(--em-cyan);
}

.em-sub-brand {
  font-family: var(--font-data);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: 6px;
}

.em-hazard-readout {
  font-family: var(--font-data);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-align: center;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 8px 10px;
  background: #050608;
  border: 1px solid var(--hw-grey);
  clip-path: var(--chamfer-sm);
  flex-shrink: 0;
}

.em-hazard-readout.is-alert {
  color: var(--crit-red);
  border-color: var(--crit-red);
  animation: emFlash 0.6s infinite alternate;
}

@keyframes emFlash {
  to { box-shadow: inset 0 0 20px rgba(255, 0, 60, 0.25); }
}

/* Meter bay */
.em-meter-bay {
  flex: 1;
  display: flex;
  justify-content: space-around;
  gap: 16px;
  padding: 16px 12px;
  background: #050608;
  border: 4px solid var(--hw-grey);
  clip-path: var(--chamfer-sm);
  box-shadow: inset 0 16px 40px rgba(0, 0, 0, 0.95);
  position: relative;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
  min-height: 220px;
}

.em-meter-bay.is-alarm {
  animation: emBayAlarm 0.5s infinite alternate;
  border-color: var(--crit-red);
}

@keyframes emBayAlarm {
  0% { box-shadow: inset 0 16px 40px rgba(255, 0, 60, 0.15); }
  100% { box-shadow: inset 0 16px 60px rgba(255, 0, 60, 0.45); }
}

.em-meter {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 42%;
  height: 100%;
}

.em-meter__label {
  font-family: var(--font-macro);
  font-size: 1.25rem;
  line-height: 1;
  text-align: center;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.em-meter__label--cyan { color: var(--em-cyan); }
.em-meter__label--yellow { color: var(--warn-yellow); }

.em-tube {
  flex: 1;
  width: 100%;
  max-width: 72px;
  background: rgba(0, 0, 0, 0.85);
  border: 4px solid #222;
  border-radius: 40px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 4px;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 1);
}

.em-tube::after {
  content: "";
  position: absolute;
  top: 0;
  left: 10px;
  width: 14px;
  height: 100%;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.12), transparent);
  border-radius: 20px;
  pointer-events: none;
}

.em-fill {
  width: 100%;
  border-radius: 30px;
  transition: height 0.08s linear, background 0.3s, box-shadow 0.3s;
}

.em-fill--charge {
  height: 100%;
  background: var(--em-cyan);
  box-shadow: 0 0 24px var(--em-cyan);
}

.em-fill--usage {
  height: 0%;
  background: var(--warn-yellow);
  box-shadow: 0 0 24px var(--warn-yellow);
}

.em-redline {
  position: absolute;
  bottom: 20%;
  left: -8px;
  right: -8px;
  height: 2px;
  background: var(--crit-red);
  box-shadow: 0 0 8px var(--crit-red);
  z-index: 3;
  pointer-events: none;
}

.em-redline__text {
  position: absolute;
  bottom: calc(20% + 4px);
  right: -52px;
  font-family: var(--font-data);
  font-size: 0.6rem;
  font-weight: 800;
  color: var(--crit-red);
}

.em-meter__val {
  font-family: var(--font-data);
  font-size: 0.95rem;
  color: #fff;
  margin-top: 8px;
  background: #000;
  padding: 4px 10px;
  border: 1px solid #333;
  clip-path: var(--chamfer-sm);
}

.em-status {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
  flex-shrink: 0;
}

.em-status strong {
  color: var(--em-cyan);
}

.em-status.is-critical strong {
  color: var(--crit-red);
}

/* Control dock */
.em-dock {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
  background: var(--hw-panel);
  padding: 14px;
  border: 2px solid #000;
  clip-path: var(--chamfer-sm);
}

.em-btn-engage {
  width: 100%;
  background: var(--hw-grey);
  border: 4px solid #111;
  color: #fff;
  font-family: var(--font-macro);
  font-size: 2.75rem;
  padding: 16px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  cursor: pointer;
  clip-path: var(--chamfer-sm);
  box-shadow: inset 0 2px 8px rgba(255, 255, 255, 0.08), 0 6px 0 #000;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
  transition: 0.1s;
}

.em-btn-engage span {
  font-family: var(--font-data);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.2em;
  margin-top: 6px;
}

.em-btn-engage:active:not(:disabled),
.em-btn-engage.is-active:not(:disabled) {
  transform: translateY(6px);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.5);
  background: #222;
  color: var(--warn-yellow);
  border-color: var(--warn-yellow);
}

.em-btn-engage:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  filter: grayscale(1);
}

.em-tactical {
  display: flex;
  gap: 10px;
}

.em-btn-tactical {
  flex: 1;
  background: var(--hw-grey);
  border: 3px solid #111;
  color: #000;
  font-family: var(--font-macro);
  font-size: 1.35rem;
  padding: 10px 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: not-allowed;
  clip-path: var(--chamfer-sm);
  box-shadow: 0 4px 0 #000;
  opacity: 0.3;
  filter: grayscale(1);
  line-height: 1;
  transition: 0.25s;
}

.em-btn-tactical.is-unlocked {
  opacity: 1;
  filter: none;
  cursor: pointer;
  pointer-events: auto;
}

.em-btn-tactical--powerup.is-unlocked {
  background: var(--warn-yellow);
  border-color: #fff;
  box-shadow: 0 0 16px rgba(255, 179, 0, 0.35), 0 4px 0 #000;
}

.em-btn-tactical--recharge.is-unlocked {
  background: var(--em-cyan);
  border-color: #fff;
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.35), 0 4px 0 #000;
}

.em-btn-tactical.is-unlocked:active {
  transform: translateY(4px);
  box-shadow: none;
}

/* Modal */
.em-modal {
  position: absolute;
  inset: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(6px);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.em-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.em-modal__box {
  width: 100%;
  max-height: 92%;
  overflow-y: auto;
  background: var(--hw-dark);
  border: 4px solid var(--em-cyan);
  padding: 24px 20px;
  text-align: center;
  clip-path: var(--chamfer-lg);
  box-shadow: 0 0 50px rgba(0, 0, 0, 1);
  transform: scale(0.92);
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.em-modal.is-open .em-modal__box {
  transform: scale(1);
}

.em-modal__box--yellow {
  border-color: var(--warn-yellow);
}

.em-modal__box--yellow .em-modal__title {
  color: var(--warn-yellow);
}

.em-modal__kicker {
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.em-modal__title {
  font-family: var(--font-macro);
  font-size: clamp(2rem, 7vw, 2.75rem);
  color: var(--em-cyan);
  line-height: 0.95;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.em-modal__desc {
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 1.55;
  margin-bottom: 16px;
  text-align: left;
}

.em-modal__stats {
  background: #000;
  border: 1px solid #333;
  padding: 14px;
  margin-bottom: 20px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: #888;
  text-align: left;
  line-height: 1.7;
  clip-path: var(--chamfer-sm);
}

.em-modal__stats span {
  color: #fff;
  font-weight: 700;
}

.em-modal__stats .is-danger {
  color: var(--crit-red);
}

.em-modal__stats .is-safe {
  color: var(--em-cyan);
}

.em-modal__stats .is-warn {
  color: var(--warn-yellow);
}

.em-modal__actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.em-modal__cta {
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
  font-family: var(--font-macro);
  font-size: 1.2rem;
  padding: 10px 20px;
  cursor: pointer;
  clip-path: var(--chamfer-sm);
  transition: 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.em-modal__cta:hover {
  background: #fff;
  color: #000;
}

.em-modal__cta--primary {
  background: var(--em-cyan);
  border-color: var(--em-cyan);
  color: #000;
  font-size: 1.35rem;
}

.em-modal__cta--primary:hover {
  background: #fff;
  border-color: #fff;
}

@media (prefers-reduced-motion: reduce) {
  .engine-intro,
  .engine-intro * {
    animation: none !important;
    transition: none !important;
  }
}