/* =============================================
   PH TANAH - Virtual Lab Game Styles
   Unique game namespace: pht-
   ============================================= */

body.pht-game-body {
  overflow-y: auto;
  overflow-x: hidden;
  height: auto;
}

.pht-page {
  height: auto;
  min-height: 100vh;
  overflow: visible;
}

.pht-page .bg-img,
.pht-page .bg-overlay {
  position: fixed;
  height: 100vh;
}

.pht-shell {
  position: relative;
  z-index: 5;
  width: min(980px, 94%);
  margin: 24px auto 58px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pht-topbar {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 42px;
  background: rgba(240,250,252,0.88);
  backdrop-filter: blur(14px);
  border: 1.5px solid rgba(160,200,100,0.3);
  border-radius: 12px;
  padding: 6px 8px;
  box-shadow: 0 4px 18px rgba(0,0,0,0.1);
}

.pht-back-btn {
  background: rgba(46,125,50,0.12);
  border: 1.5px solid rgba(46,125,50,0.3);
  color: #1b5e2f;
  font-family: 'Nunito', sans-serif;
  font-weight: 900;
  font-size: 0.62rem;
  line-height: 1;
  padding: 6px 8px;
  border-radius: 9px;
  white-space: nowrap;
  transition: background 0.2s, transform 0.15s;
}

.pht-back-btn:hover {
  background: rgba(46,125,50,0.22);
  transform: translateX(-2px);
}

.pht-progress-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0;
  min-width: 0;
}

.pht-progress-track {
  flex: 1;
  height: 8px;
  background: rgba(0,0,0,0.1);
  border-radius: 99px;
  overflow: hidden;
}

.pht-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #2e7d32, #66bb6a);
  border-radius: 99px;
  transition: width 0.45s ease;
}

.pht-step-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  font-size: 0.78rem;
  font-weight: 800;
  color: #2e7d32;
  white-space: nowrap;
}

.pht-score-pill {
  background: linear-gradient(135deg, #ff9500, #ffb74d);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  font-size: 0.68rem;
  line-height: 1;
  min-width: 46px;
  padding: 6px 9px;
  border-radius: 99px;
  box-shadow: 0 2px 10px rgba(255,149,0,0.3);
  white-space: nowrap;
  text-align: center;
}

.pht-station {
  background: rgba(255,255,255,0.84);
  backdrop-filter: blur(16px);
  border: 1.5px solid rgba(160,200,100,0.35);
  border-radius: 24px;
  padding: 30px 28px 26px;
  box-shadow: 0 8px 36px rgba(0,0,0,0.13);
  animation: phtStationIn 0.35s ease;
}

.pht-hidden {
  display: none !important;
}

@keyframes phtStationIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.pht-station-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
  margin-bottom: 24px;
}

.pht-station-badge {
  background: linear-gradient(135deg, #1b5e2f, #2e7d32);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  font-size: 0.85rem;
  padding: 4px 18px;
  border-radius: 99px;
  letter-spacing: 0.04em;
  box-shadow: 0 2px 10px rgba(27,94,47,0.25);
}

.pht-station-title {
  font-family: 'Fredoka One', cursive;
  font-size: clamp(1.15rem, 2.6vw, 1.62rem);
  color: #1b5e2f;
  line-height: 1.2;
  letter-spacing: 0;
}

.pht-station-desc {
  font-size: 0.92rem;
  color: #4a6a4a;
  font-weight: 700;
}

.pht-lab-board {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.pht-scale-panel {
  background: rgba(246,240,228,0.88);
  border: 1.5px solid rgba(160,130,80,0.22);
  border-radius: 20px;
  padding: 20px;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.05);
}

.pht-scale-numbers {
  display: none;
  justify-content: space-between;
  color: #1b5e2f;
  font-weight: 900;
  font-size: 0.82rem;
  margin-bottom: 8px;
}

.pht-scale-bar {
  display: grid;
  grid-template-columns: 1fr 0.72fr 1fr;
  min-height: 150px;
  border-radius: 18px;
  overflow: hidden;
  border: 2px solid rgba(255,255,255,0.8);
  box-shadow: 0 6px 22px rgba(0,0,0,0.14);
}

.pht-scale-zone {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  justify-content: stretch;
  gap: 10px;
  padding: 16px;
}

.pht-scale-side-label {
  color: #fff;
  font-family: 'Fredoka One', cursive;
  font-size: 0.82rem;
  line-height: 1;
  text-align: center;
  text-shadow: 0 2px 5px rgba(0,0,0,0.28);
  white-space: nowrap;
}

.pht-scale-zone-acid {
  background: linear-gradient(135deg, #d6423a, #f5ab45);
}

.pht-scale-zone-neutral {
  background: linear-gradient(135deg, #f2d34b, #52b96b);
}

.pht-scale-zone-alkali {
  background: linear-gradient(135deg, #46b7ca, #6e5bbf);
}

.pht-chip-bank,
.pht-effect-bank,
.pht-procedure-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  min-height: 46px;
}

.pht-draggable {
  border: none;
  cursor: grab;
  user-select: none;
  touch-action: none;
}

.pht-draggable:active {
  cursor: grabbing;
}

.pht-label-chip,
.pht-effect-chip {
  background: linear-gradient(135deg, #1b5e2f, #2e7d32);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  padding: 9px 18px;
  border-radius: 99px;
  box-shadow: 0 3px 12px rgba(27,94,47,0.25);
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.2s;
}

.pht-label-chip:hover,
.pht-effect-chip:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(27,94,47,0.33);
}

.pht-procedure-chip {
  width: min(100%, 420px);
  background: linear-gradient(135deg, #1b5e2f, #2e7d32);
  color: #fff;
  font-family: 'Nunito', sans-serif;
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1.32;
  text-align: left;
  padding: 12px 14px;
  border-radius: 14px;
  box-shadow: 0 3px 12px rgba(27,94,47,0.24);
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.2s;
}

.pht-procedure-chip:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(27,94,47,0.32);
}

.pht-draggable.pht-selected-chip {
  outline: 3px solid rgba(255,149,0,0.62);
  transform: translateY(-2px);
}

.pht-draggable.pht-dragging {
  opacity: 0.38;
}

.pht-touch-preview {
  position: fixed;
  z-index: 10000;
  pointer-events: none;
  opacity: 0.92;
  transform: scale(1.04);
  box-shadow: 0 10px 24px rgba(0,0,0,0.22);
}

.pht-draggable.pht-locked-chip {
  cursor: default;
  opacity: 0.92;
}

.pht-drop-zone {
  width: 100%;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6px;
  border: 2.5px dashed rgba(46,125,50,0.45);
  border-radius: 14px;
  background: rgba(255,255,255,0.7);
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

.pht-scale-bar .pht-drop-zone {
  max-width: 220px;
  min-height: 76px;
  background: rgba(255,255,255,0.72);
}

.pht-drop-zone.pht-drag-over {
  background: rgba(46,125,50,0.14);
  border-color: #2e7d32;
  border-style: solid;
  transform: translateY(-1px);
}

.pht-drop-zone.pht-correct {
  background: rgba(46,125,50,0.19);
  border-color: #2e7d32;
  border-style: solid;
}

.pht-drop-zone.pht-wrong {
  background: rgba(220,50,50,0.13);
  border-color: #e53935;
  border-style: solid;
  animation: phtShake 0.38s ease;
}

.pht-drop-hint {
  color: rgba(46,125,50,0.68);
  font-size: 0.72rem;
  font-weight: 800;
  pointer-events: none;
}

.pht-drop-zone .pht-label-chip,
.pht-drop-zone .pht-effect-chip {
  max-width: 100%;
  font-size: 0.72rem;
  padding: 7px 10px;
  white-space: normal;
}

.pht-drop-zone .pht-procedure-chip {
  width: 100%;
  font-size: 0.72rem;
  padding: 9px 10px;
  cursor: default;
}

@keyframes phtShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.pht-theory-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.85fr) minmax(300px, 1.15fr);
  gap: 18px;
  align-items: stretch;
}

.pht-report-panel,
.pht-effect-panel,
.pht-instrument-panel {
  background: rgba(246,240,228,0.82);
  border: 1.5px solid rgba(160,130,80,0.22);
  border-radius: 20px;
  padding: 18px;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.05);
}

.pht-panel-label {
  font-family: 'Fredoka One', cursive;
  color: #1b5e2f;
  font-size: 1rem;
  text-align: center;
  margin-bottom: 14px;
}

.pht-factor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.pht-factor-card {
  position: relative;
  min-height: 58px;
  background: rgba(255,255,255,0.86);
  border: 2px solid rgba(46,125,50,0.22);
  border-radius: 14px;
  color: #1a2e1a;
  font-family: 'Nunito', sans-serif;
  font-size: 0.88rem;
  font-weight: 900;
  cursor: pointer;
  padding: 12px 46px 12px 14px;
  text-align: left;
  transition: all 0.18s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.pht-factor-card::after {
  content: "";
  position: absolute;
  right: 13px;
  top: 50%;
  width: 22px;
  height: 22px;
  border: 2px solid rgba(46,125,50,0.45);
  border-radius: 50%;
  transform: translateY(-50%);
}

.pht-factor-card:hover:not(:disabled) {
  border-color: #2e7d32;
  background: rgba(46,125,50,0.08);
  transform: translateY(-2px);
}

.pht-factor-card.pht-stamped {
  background: rgba(46,125,50,0.15);
  border-color: #2e7d32;
}

.pht-factor-card.pht-stamped::after {
  content: "OK";
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: #fff;
  background: #2e7d32;
  border-color: #2e7d32;
  font-size: 0.63rem;
  font-weight: 900;
  transform: translateY(-50%) rotate(-9deg);
}

.pht-factor-card.pht-correct {
  border-color: #2e7d32;
  background: rgba(46,125,50,0.2);
}

.pht-factor-card.pht-wrong {
  border-color: #e53935;
  background: rgba(220,50,50,0.12);
}

.pht-effect-targets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

.pht-effect-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(255,255,255,0.78);
  border: 1.5px solid rgba(46,125,50,0.18);
  border-radius: 16px;
  padding: 12px;
}

.pht-effect-card p {
  min-height: 58px;
  color: #365236;
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1.28;
  text-align: center;
}

.pht-effect-visual {
  height: 72px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: linear-gradient(180deg, rgba(141,199,91,0.16), rgba(113,83,50,0.18));
  border-radius: 12px;
  overflow: hidden;
}

.pht-root {
  position: relative;
  width: 64px;
  height: 54px;
  border-bottom: 8px solid #7b5235;
}

.pht-root::before,
.pht-root::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 6px;
  height: 46px;
  background: #7b5235;
  border-radius: 99px;
  transform-origin: bottom center;
}

.pht-root::before {
  transform: translateX(-50%) rotate(25deg);
}

.pht-root::after {
  transform: translateX(-50%) rotate(-25deg);
}

.pht-root-healthy {
  background: linear-gradient(180deg, #59b35f, #2e7d32);
  width: 34px;
  height: 48px;
  border-radius: 26px 26px 8px 8px;
  border-bottom-color: #7b5235;
}

.pht-root-fungal {
  background:
    radial-gradient(circle at 35% 35%, rgba(255,255,255,0.95) 0 5px, transparent 6px),
    radial-gradient(circle at 62% 58%, rgba(255,255,255,0.9) 0 4px, transparent 5px),
    linear-gradient(180deg, #8fcf7a, #5c8d4d);
  width: 38px;
  height: 44px;
  border-radius: 26px 26px 10px 10px;
  border-bottom-color: #7b5235;
}

.pht-experiment-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1.2fr);
  gap: 18px;
}

.pht-lab-demo {
  position: relative;
  height: 270px;
  background: linear-gradient(180deg, rgba(223,237,216,0.92), rgba(188,211,177,0.84));
  border: 1.5px solid rgba(46,125,50,0.18);
  border-radius: 18px;
  overflow: hidden;
}

.pht-lab-demo::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 72px;
  background: linear-gradient(180deg, #b88f66, #8f6947);
}

.pht-buffer-bottle {
  position: absolute;
  left: 26px;
  bottom: 72px;
  width: 56px;
  height: 116px;
  border: 4px solid #5aa1bd;
  border-radius: 8px 8px 16px 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.78), rgba(91,177,210,0.42));
  z-index: 2;
}

.pht-buffer-bottle::before {
  content: "";
  position: absolute;
  top: -26px;
  left: 14px;
  width: 26px;
  height: 26px;
  background: #5aa1bd;
  border-radius: 6px 6px 0 0;
}

.pht-buffer-bottle span {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  color: #1b5e2f;
  font-size: 0.62rem;
  font-weight: 900;
}

.pht-beaker {
  position: absolute;
  left: 50%;
  bottom: 54px;
  width: 118px;
  height: 112px;
  transform: translateX(-50%);
  border: 5px solid rgba(87,115,122,0.82);
  border-top: 0;
  border-radius: 0 0 22px 22px;
  background: rgba(255,255,255,0.32);
  z-index: 2;
}

.pht-beaker::before {
  content: "";
  position: absolute;
  left: -10px;
  right: -10px;
  top: -6px;
  height: 10px;
  border: 5px solid rgba(87,115,122,0.82);
  border-bottom: 0;
  border-radius: 18px 18px 0 0;
}

.pht-beaker-soil {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 8px;
  height: 38px;
  background:
    radial-gradient(circle at 25% 35%, rgba(64,45,30,0.6) 0 3px, transparent 4px),
    radial-gradient(circle at 72% 45%, rgba(64,45,30,0.5) 0 4px, transparent 5px),
    #8a5d3b;
  border-radius: 48% 48% 14px 14px;
}

.pht-beaker-water {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 38px;
  height: 42px;
  background: rgba(104,179,216,0.45);
  border-radius: 8px 8px 20px 20px;
}

.pht-meter {
  position: absolute;
  right: 32px;
  top: 38px;
  width: 72px;
  height: 136px;
  border-radius: 16px;
  background: linear-gradient(180deg, #2f4247, #1b2a2e);
  box-shadow: 0 8px 20px rgba(0,0,0,0.22);
  z-index: 4;
  transform-origin: top center;
  transition: transform 0.6s ease, right 0.6s ease, top 0.6s ease;
}

.pht-meter-screen {
  margin: 12px auto 0;
  width: 52px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #b9f0c4;
  border-radius: 8px;
  color: #1b5e2f;
  font-family: 'Fredoka One', cursive;
  font-size: 0.92rem;
}

.pht-meter-probe {
  position: absolute;
  left: 50%;
  bottom: -88px;
  width: 8px;
  height: 96px;
  transform: translateX(-50%);
  background: #9da7aa;
  border-radius: 99px;
}

.pht-lab-demo.pht-demo-run .pht-meter {
  right: 126px;
  top: 18px;
  transform: rotate(-7deg);
}

.pht-lab-demo.pht-demo-run .pht-beaker-water {
  animation: phtStir 1.1s ease-in-out 0.3s 3;
}

@keyframes phtStir {
  0%, 100% { transform: translateX(0); }
  35% { transform: translateX(7px); }
  70% { transform: translateX(-6px); }
}

.pht-demo-caption {
  margin-top: 12px;
  min-height: 34px;
  color: #4a6a4a;
  font-size: 0.82rem;
  font-weight: 800;
  text-align: center;
  line-height: 1.35;
}

.pht-procedure-area {
  display: grid;
  grid-template-columns: minmax(230px, 1fr) minmax(230px, 1fr);
  gap: 14px;
}

.pht-procedure-bank {
  align-content: start;
}

.pht-procedure-slots {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pht-procedure-slot {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 10px;
  align-items: stretch;
}

.pht-slot-number {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 66px;
  border-radius: 12px;
  background: linear-gradient(135deg, #ff9500, #ffb74d);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  box-shadow: 0 2px 10px rgba(255,149,0,0.28);
}

.pht-procedure-slot .pht-drop-zone {
  min-height: 66px;
}

.pht-feedback {
  min-height: 20px;
  margin-top: 16px;
  color: #d84315;
  font-size: 0.86rem;
  font-weight: 800;
  text-align: center;
}

.pht-feedback.pht-positive {
  color: #1b5e2f;
}

.pht-next-btn {
  display: block;
  margin: 18px auto 0;
  background: linear-gradient(135deg, #2e7d32, #43a047);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  font-size: 1rem;
  letter-spacing: 0.02em;
  padding: 12px 38px;
  border: none;
  border-radius: 99px;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(46,125,50,0.3);
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.2s;
}

.pht-next-btn:disabled {
  opacity: 0.46;
  cursor: not-allowed;
}

.pht-next-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(46,125,50,0.38);
}

.pht-complete-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
  padding: 16px 0;
}

.pht-complete-medal {
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, #ff9500, #ffb74d);
  font-family: 'Fredoka One', cursive;
  font-size: 2rem;
  box-shadow: 0 8px 26px rgba(255,149,0,0.35);
}

.pht-complete-title {
  font-family: 'Fredoka One', cursive;
  color: #1b5e2f;
  font-size: 2rem;
  letter-spacing: 0;
}

.pht-complete-sub {
  color: #4a6a4a;
  font-weight: 700;
}

.pht-final-score {
  background: linear-gradient(135deg, #ff9500, #ffb74d);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  font-size: 1.2rem;
  padding: 12px 32px;
  border-radius: 99px;
  box-shadow: 0 4px 18px rgba(255,149,0,0.32);
}

.pht-home-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1b5e2f, #2e7d32);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  padding: 11px 28px;
  border-radius: 99px;
  box-shadow: 0 3px 12px rgba(0,0,0,0.15);
  transition: transform 0.15s, box-shadow 0.15s;
}

.pht-home-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 7px 20px rgba(0,0,0,0.2);
}

.pht-result-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  background: rgba(0,0,0,0.38);
  backdrop-filter: blur(10px);
}

.pht-result-box {
  width: min(360px, 100%);
  background: rgba(255,255,255,0.96);
  border: 1.5px solid rgba(160,200,100,0.35);
  border-radius: 18px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 8px 36px rgba(0,0,0,0.18);
  animation: phtResultIn 0.22s ease;
}

.pht-result-box h2 {
  color: #1b5e2f;
  font-family: 'Fredoka One', cursive;
  font-size: 1.28rem;
  margin-bottom: 8px;
}

.pht-result-box p {
  color: #4a6a4a;
  font-weight: 800;
  line-height: 1.35;
}

@keyframes phtResultIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

@media (max-width: 760px) {
  .pht-shell {
    width: 100%;
    margin-top: 8px;
    padding: 0 8px;
    gap: 10px;
  }

  .pht-topbar {
    gap: 8px;
    padding: 9px 10px;
    border-radius: 14px;
  }

  .pht-back-btn,
  .pht-step-label,
  .pht-score-pill {
    font-size: 0.68rem;
  }

  .pht-step-label {
    display: none;
  }

  .pht-progress-track {
    min-width: 64px;
  }

  .pht-score-pill {
    padding: 6px 9px;
  }

  .pht-station {
    padding: 16px 10px 18px;
    border-radius: 18px;
  }

  .pht-station-header {
    margin-bottom: 14px;
  }

  .pht-station-title {
    font-size: 1rem;
  }

  .pht-station-desc {
    font-size: 0.72rem;
  }

  .pht-scale-panel {
    padding: 10px;
  }

  .pht-scale-bar {
    min-height: 126px;
    grid-template-columns: 1fr;
  }

  .pht-scale-zone {
    min-height: 82px;
    padding: 9px;
  }

  .pht-scale-bar .pht-drop-zone {
    min-height: 52px;
    max-width: 100%;
  }

  .pht-label-chip,
  .pht-effect-chip {
    max-width: 150px;
    font-size: 0.62rem;
    line-height: 1.15;
    padding: 7px 8px;
    white-space: normal;
  }

  .pht-theory-grid,
  .pht-experiment-layout,
  .pht-procedure-area {
    grid-template-columns: 1fr;
  }

  .pht-effect-targets {
    grid-template-columns: 1fr;
  }

  .pht-factor-card {
    min-height: 50px;
    font-size: 0.76rem;
  }

  .pht-lab-demo {
    height: 230px;
  }

  .pht-buffer-bottle {
    left: 18px;
  }

  .pht-meter {
    right: 18px;
    top: 34px;
    transform: scale(0.88);
  }

  .pht-lab-demo.pht-demo-run .pht-meter {
    right: 108px;
    top: 14px;
    transform: scale(0.88) rotate(-7deg);
  }

  .pht-procedure-chip {
    width: 100%;
    font-size: 0.68rem;
    padding: 9px 10px;
  }

  .pht-procedure-slot {
    grid-template-columns: 30px 1fr;
    gap: 7px;
  }

  .pht-slot-number,
  .pht-procedure-slot .pht-drop-zone {
    min-height: 58px;
  }

  .pht-next-btn {
    font-size: 0.8rem;
    padding: 10px 24px;
  }
}

@media (max-width: 420px) {
  .pht-progress-wrap {
    gap: 6px;
  }

  .pht-back-btn {
    padding: 7px 9px;
  }

  .pht-station-badge {
    font-size: 0.68rem;
  }

  .pht-chip-bank,
  .pht-effect-bank,
  .pht-procedure-bank {
    gap: 7px;
  }
}

/* =============================================
   PHONE-ONLY FIXED VIEWPORT
   Target surface: 390px x 844px, no station scroll
   ============================================= */

html:has(body.pht-game-body),
body.pht-game-body {
  width: 100%;
  height: 100dvh;
  min-height: 0;
  overflow: hidden;
}

body.pht-game-body {
  background: #eaf4df;
}

.pht-page {
  width: min(100vw, 390px);
  height: min(100dvh, 844px);
  min-height: 0;
  max-width: 390px;
  max-height: 844px;
  margin: 0 auto;
  overflow: hidden;
}

.pht-shell {
  width: 100%;
  height: min(calc(100dvh - 52px), 792px);
  min-height: 0;
  margin: 0 auto;
  padding: 6px 7px 7px;
  gap: 6px;
  overflow: hidden;
}

.pht-topbar {
  min-height: 42px;
  padding: 6px 8px;
  gap: 7px;
  border-radius: 12px;
  flex-shrink: 0;
}

.pht-back-btn {
  padding: 6px 8px;
  border-radius: 9px;
  font-size: 0.62rem;
}

.pht-progress-wrap {
  min-width: 0;
  gap: 5px;
}

.pht-progress-track {
  min-width: 58px;
  height: 8px;
}

.pht-step-label {
  display: none;
}

.pht-score-pill {
  padding: 6px 9px;
  font-size: 0.68rem;
}

.pht-station {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  padding: 12px 10px 10px;
  border-radius: 16px;
  justify-content: stretch;
}

.pht-station:not(.pht-hidden) {
  display: flex;
  flex-direction: column;
}

#pht-station-complete.pht-station:not(.pht-hidden) {
  flex: 0 0 auto;
  width: min(340px, 100%);
  min-height: 0;
  height: auto;
  align-self: center;
  margin-top: 72px;
  padding: 18px 16px;
}

.pht-station-header {
  flex: 0 0 auto;
  gap: 3px;
  margin-bottom: 8px;
}

.pht-station-badge {
  font-size: 0.64rem;
  padding: 3px 14px;
}

.pht-station-title {
  font-size: 0.92rem;
  line-height: 1.08;
}

.pht-station-desc {
  font-size: 0.62rem;
  line-height: 1.12;
}

.pht-lab-board,
.pht-theory-grid,
.pht-experiment-layout {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

.pht-feedback {
  flex: 0 0 auto;
  min-height: 14px;
  margin-top: 5px;
  font-size: 0.58rem;
  line-height: 1.1;
}

.pht-next-btn {
  flex: 0 0 auto;
  margin-top: 5px;
  padding: 8px 22px;
  min-height: 34px;
  border-radius: 18px;
  font-size: 0.7rem;
  line-height: 1;
}

/* Station 1 compact scale */
.pht-lab-board {
  gap: 8px;
  display: flex;
  flex-direction: column;
}

.pht-scale-panel {
  flex: 1 1 auto;
  min-height: 0;
  padding: 8px;
  border-radius: 13px;
  display: flex;
  flex-direction: column;
}

.pht-scale-numbers {
  font-size: 0.62rem;
  margin-bottom: 5px;
}

.pht-scale-bar {
  grid-template-columns: 1fr;
  min-height: 0;
  flex: 1 1 auto;
  height: auto;
  max-height: none;
  border-radius: 13px;
}

.pht-scale-zone {
  min-height: 0;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 6px;
  padding: clamp(8px, 1.5dvh, 12px) 9px;
}

.pht-scale-side-label {
  font-size: clamp(0.7rem, 2.85vw, 0.84rem);
}

.pht-scale-bar .pht-drop-zone {
  min-height: clamp(54px, 8.5dvh, 74px);
  max-width: 100%;
  border-radius: 10px;
}

.pht-chip-bank,
.pht-effect-bank,
.pht-procedure-bank {
  gap: 6px;
  min-height: 0;
}

.pht-label-chip,
.pht-effect-chip {
  max-width: 142px;
  min-height: 36px;
  padding: 8px 10px;
  border-radius: 18px;
  font-size: clamp(0.62rem, 2.5vw, 0.72rem);
  line-height: 1.08;
  white-space: normal;
}

.pht-drop-zone {
  min-height: 34px;
  padding: 4px;
  border-width: 2px;
  border-radius: 10px;
}

.pht-drop-hint {
  font-size: clamp(0.58rem, 2.35vw, 0.68rem);
  line-height: 1;
}

.pht-drop-zone .pht-label-chip,
.pht-drop-zone .pht-effect-chip {
  min-height: 24px;
  padding: 4px 6px;
  font-size: 0.5rem;
}

/* Station 2 compact report */
.pht-theory-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  align-content: start;
  align-items: start;
}

.pht-report-panel,
.pht-effect-panel,
.pht-instrument-panel {
  padding: 8px;
  border-radius: 13px;
}

.pht-panel-label {
  font-size: 0.68rem;
  margin-bottom: 6px;
}

.pht-factor-grid {
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.pht-factor-card {
  min-height: 34px;
  padding: 6px 26px 6px 8px;
  border-radius: 10px;
  font-size: 0.54rem;
  line-height: 1.08;
}

.pht-factor-card::after {
  right: 7px;
  width: 15px;
  height: 15px;
  border-width: 1.5px;
}

.pht-factor-card.pht-stamped::after {
  width: 23px;
  height: 23px;
  font-size: 0.46rem;
}

.pht-effect-targets {
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 7px;
}

.pht-effect-card {
  gap: 5px;
  padding: 7px;
  border-radius: 11px;
}

.pht-effect-card p {
  min-height: 34px;
  font-size: 0.5rem;
  line-height: 1.1;
}

.pht-effect-visual {
  height: 38px;
  border-radius: 8px;
}

.pht-root {
  width: 42px;
  height: 34px;
  border-bottom-width: 5px;
}

.pht-root::before,
.pht-root::after {
  width: 4px;
  height: 28px;
}

.pht-root-healthy {
  width: 24px;
  height: 31px;
}

.pht-root-fungal {
  width: 27px;
  height: 30px;
}

/* Station 3 compact experiment */
.pht-experiment-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  align-content: start;
  align-items: start;
}

.pht-lab-demo {
  height: 130px;
  border-radius: 12px;
}

.pht-lab-demo::after {
  height: 35px;
}

.pht-buffer-bottle {
  left: 18px;
  bottom: 35px;
  width: 31px;
  height: 60px;
  border-width: 2px;
  border-radius: 5px 5px 9px 9px;
}

.pht-buffer-bottle::before {
  top: -14px;
  left: 8px;
  width: 14px;
  height: 14px;
  border-radius: 4px 4px 0 0;
}

.pht-buffer-bottle span {
  bottom: 8px;
  font-size: 0.42rem;
}

.pht-beaker {
  bottom: 27px;
  width: 72px;
  height: 64px;
  border-width: 3px;
  border-radius: 0 0 14px 14px;
}

.pht-beaker::before {
  left: -6px;
  right: -6px;
  top: -4px;
  height: 7px;
  border-width: 3px;
}

.pht-beaker-soil {
  left: 7px;
  right: 7px;
  bottom: 5px;
  height: 21px;
}

.pht-beaker-water {
  left: 8px;
  right: 8px;
  bottom: 22px;
  height: 24px;
}

.pht-meter {
  right: 22px;
  top: 24px;
  width: 43px;
  height: 78px;
  border-radius: 11px;
}

.pht-meter-screen {
  width: 32px;
  height: 22px;
  margin-top: 8px;
  border-radius: 6px;
  font-size: 0.56rem;
}

.pht-meter-probe {
  bottom: -52px;
  width: 5px;
  height: 57px;
}

.pht-lab-demo.pht-demo-run .pht-meter {
  right: 96px;
  top: 11px;
  transform: rotate(-7deg);
}

.pht-demo-caption {
  min-height: 18px;
  margin-top: 5px;
  font-size: 0.52rem;
  line-height: 1.12;
}

.pht-procedure-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  min-height: 0;
}

.pht-procedure-chip {
  width: 100%;
  min-height: 42px;
  max-height: 42px;
  padding: 6px 7px;
  border-radius: 9px;
  font-size: 0.47rem;
  line-height: 1.08;
  overflow: hidden;
}

.pht-procedure-bank {
  align-content: start;
}

.pht-procedure-slots {
  gap: 6px;
}

.pht-procedure-slot {
  grid-template-columns: 23px 1fr;
  gap: 5px;
}

.pht-slot-number {
  min-height: 42px;
  border-radius: 8px;
  font-size: 0.66rem;
}

.pht-procedure-slot .pht-drop-zone {
  min-height: 42px;
}

.pht-drop-zone .pht-procedure-chip {
  min-height: 34px;
  max-height: 34px;
  padding: 4px 5px;
  font-size: 0.43rem;
}

.pht-complete-inner {
  gap: 8px;
  padding: 0;
}

.pht-complete-medal {
  width: 62px;
  height: 62px;
  font-size: 1.38rem;
}

.pht-complete-title {
  font-size: 1.28rem;
}

.pht-complete-sub {
  font-size: 0.72rem;
}

.pht-final-score {
  padding: 9px 22px;
  font-size: 0.86rem;
}

.pht-home-btn {
  padding: 9px 22px;
  font-size: 0.76rem;
}

/* Balance the later pH stations across the whole phone viewport. */
#pht-station-2 .pht-theory-grid {
  grid-template-rows: minmax(116px, 0.36fr) minmax(0, 1fr);
  align-content: stretch;
  align-items: stretch;
}

#pht-station-2 .pht-report-panel,
#pht-station-2 .pht-effect-panel {
  min-height: 0;
  display: flex;
  flex-direction: column;
}

#pht-station-2 .pht-factor-grid {
  flex: 1 1 auto;
  min-height: 0;
  grid-template-rows: repeat(2, minmax(0, 1fr));
}

#pht-station-2 .pht-factor-card {
  min-height: 0;
  font-size: clamp(0.58rem, 2.35vw, 0.68rem);
}

#pht-station-2 .pht-effect-targets {
  flex: 1 1 auto;
  min-height: 0;
  align-items: stretch;
}

#pht-station-2 .pht-effect-card {
  min-height: 0;
  display: flex;
  flex-direction: column;
}

#pht-station-2 .pht-effect-visual {
  flex: 0.9 1 auto;
  height: auto;
  min-height: 54px;
  align-items: center;
}

#pht-station-2 .pht-effect-visual .pht-root {
  transform: scale(1.35);
  transform-origin: center bottom;
}

#pht-station-2 .pht-effect-card p {
  flex: 0 0 auto;
  min-height: 42px;
  font-size: clamp(0.54rem, 2.15vw, 0.64rem);
}

#pht-station-2 .pht-effect-card .pht-drop-zone {
  flex: 0 0 auto;
  min-height: 48px;
}

#pht-station-3 .pht-experiment-layout {
  grid-template-rows: minmax(180px, 0.42fr) minmax(0, 1fr);
  align-content: stretch;
  align-items: stretch;
}

#pht-station-3 .pht-instrument-panel,
#pht-station-3 .pht-procedure-area {
  min-height: 0;
}

#pht-station-3 .pht-instrument-panel {
  display: flex;
  flex-direction: column;
}

#pht-station-3 .pht-lab-demo {
  flex: 1 1 auto;
  height: auto;
  min-height: 150px;
}

#pht-station-3 .pht-procedure-area {
  align-items: stretch;
}

#pht-station-3 .pht-procedure-bank,
#pht-station-3 .pht-procedure-slots {
  min-height: 0;
  display: grid;
  grid-template-rows: repeat(4, minmax(0, 1fr));
  align-content: stretch;
}

#pht-station-3 .pht-procedure-chip {
  min-height: 0;
  max-height: none;
  height: 100%;
  font-size: clamp(0.48rem, 1.95vw, 0.58rem);
}

#pht-station-3 .pht-procedure-slot {
  min-height: 0;
}

#pht-station-3 .pht-slot-number,
#pht-station-3 .pht-procedure-slot .pht-drop-zone {
  min-height: 0;
  height: 100%;
}