/* =========================================================
  MoleLab Interaktif - assets/css/responsive-lock.css
  ---------------------------------------------------------
  RESPONSIVE UPGRADE v2

  Tujuan file ini:
  - Desktop tetap besar, lega, dan stabil.
  - Tablet tetap nyaman dengan panel turun ke bawah.
  - HP berubah menjadi satu kolom tanpa merusak animasi.
  - Tidak memakai fixed-stage 1440 x 900.
  - Tidak memakai transform scale untuk seluruh aplikasi.

  PENTING:
  - File ini WAJIB dimuat paling akhir setelah semua CSS lain.
  - Pastikan app.js tidak lagi melakukan transform: scale(...) pada .app-shell.
========================================================= */

:root {
  --design-width: 1440px;
  --design-height: 900px;
  --app-scale: 1;
  --header-height: 76px;
  --side-panel-width: 370px;
  --responsive-page-padding: clamp(0.85rem, 1.6vw, 1.5rem);
  --workspace-max-width: 1480px;
  --lab-min-height: calc(100dvh - var(--header-height) - 3rem);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100% !important;
  min-width: 0 !important;
  min-height: 100% !important;
  margin: 0 !important;
  overflow-x: hidden !important;
  overflow-y: auto !important;
}

body {
  background: var(--gradient-page) !important;
}

body.is-modal-open {
  overflow: hidden !important;
}

img,
svg,
canvas,
video {
  max-width: 100%;
}

button,
input,
select,
textarea {
  max-width: 100%;
}

/* =========================================================
  App Shell - Fluid
========================================================= */

.app-shell {
  width: 100% !important;
  min-width: 0 !important;
  max-width: none !important;
  min-height: 100dvh !important;
  transform: none !important;
  transform-origin: initial !important;
  position: relative !important;
  isolation: isolate !important;
}

.screen,
.home-screen,
.app-header,
.app-main {
  width: 100% !important;
  min-width: 0 !important;
  max-width: none !important;
}

.app-screen {
  width: 100% !important;
}

.app-screen.is-active {
  display: block !important;
}

/* =========================================================
  Home Screen
========================================================= */

.home-screen {
  min-height: 100dvh !important;
  display: none !important;
  place-items: center !important;
  padding: clamp(1rem, 4vw, 4rem) !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
}

.home-screen.is-active {
  display: grid !important;
}

.home-content,
.game-menu-content {
  width: min(1180px, 100%) !important;
  max-width: 100% !important;
  margin-inline: auto !important;
}

.home-title {
  font-size: clamp(2.6rem, 7vw, 5.6rem) !important;
}

.home-subtitle {
  max-width: 860px !important;
  font-size: clamp(0.95rem, 1.6vw, 1.25rem) !important;
}

.home-hero-visual {
  width: min(680px, 100%) !important;
  max-width: 100% !important;
  min-height: auto !important;
  flex-wrap: wrap !important;
}

.hero-molecule {
  width: min(260px, 100%) !important;
}

.hero-equation-card {
  min-width: min(250px, 100%) !important;
}

.mode-card-grid,
.mode-card-grid-large {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)) !important;
  gap: clamp(0.9rem, 1.6vw, 1.25rem) !important;
}

.mode-card-wide {
  grid-column: auto !important;
}

.mode-card {
  min-height: 260px !important;
}

.mode-preview {
  width: min(190px, 100%) !important;
  height: 128px !important;
}

/* =========================================================
  Header
========================================================= */

.app-header {
  min-height: var(--header-height) !important;
  position: sticky !important;
  top: 0 !important;
  z-index: var(--z-header) !important;
  display: grid !important;
  grid-template-columns: minmax(170px, 230px) minmax(0, 1fr) auto !important;
  align-items: center !important;
  gap: clamp(0.5rem, 1.3vw, 1rem) !important;
  padding: 0.75rem var(--responsive-page-padding) !important;
}

.brand {
  min-width: 0 !important;
}

.brand-icon {
  width: 42px !important;
  min-width: 42px !important;
  height: 42px !important;
}

.brand strong {
  font-size: clamp(1rem, 1.5vw, 1.25rem) !important;
}

.brand small {
  display: block !important;
  font-size: 0.7rem !important;
}

.main-tabs {
  display: flex !important;
  justify-content: flex-start !important;
  width: 100% !important;
  max-width: 100% !important;
  overflow-x: auto !important;
  overflow-y: hidden !important;
  scrollbar-width: none !important;
  -webkit-overflow-scrolling: touch !important;
}

.main-tabs::-webkit-scrollbar {
  display: none !important;
}

.tab-button {
  flex: 0 0 auto !important;
  min-height: 40px !important;
  padding: 0 0.8rem !important;
  font-size: 0.85rem !important;
  white-space: nowrap !important;
}

.header-actions {
  display: flex !important;
  justify-content: flex-end !important;
  align-items: center !important;
  gap: 0.5rem !important;
}

/* =========================================================
  Main Workspace - Desktop First
========================================================= */

.app-main {
  min-height: calc(100dvh - var(--header-height)) !important;
  padding: var(--responsive-page-padding) !important;
  overflow: visible !important;
}

.workspace,
.game-play {
  width: min(var(--workspace-max-width), 100%) !important;
  max-width: 100% !important;
  min-width: 0 !important;
  margin-inline: auto !important;
}

.workspace-two-columns {
  display: grid !important;
  grid-template-columns: minmax(740px, 1fr) minmax(330px, var(--side-panel-width)) !important;
  gap: clamp(1rem, 1.6vw, 1.35rem) !important;
  align-items: start !important;
}

.side-panel-stack {
  display: grid !important;
  grid-template-columns: 1fr !important;
  gap: 1rem !important;
  align-content: start !important;
}

.lab-panel {
  min-height: max(720px, var(--lab-min-height)) !important;
  position: relative !important;
  overflow: hidden !important;
}

.info-card {
  padding: clamp(0.9rem, 1.5vw, 1.25rem) !important;
}

/* =========================================================
  Lab Stage & Controls
========================================================= */

.lab-toolbar {
  position: absolute !important;
  top: 1.25rem !important;
  left: 1.25rem !important;
  right: 1.25rem !important;
  z-index: 8 !important;
  display: flex !important;
  align-items: flex-start !important;
  justify-content: space-between !important;
  gap: 1rem !important;
}

.simulation-stage {
  position: absolute !important;
  inset: 92px 1.25rem 168px !important;
  display: grid !important;
  place-items: center !important;
  overflow: hidden !important;
}

.experiment-control-panel {
  position: absolute !important;
  left: 1.25rem !important;
  right: 1.25rem !important;
  bottom: 1.25rem !important;
  z-index: 9 !important;
  display: flex !important;
  align-items: end !important;
  gap: 0.75rem !important;
  padding: 1rem !important;
}

.grid-controls {
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto !important;
  align-items: end !important;
  width: 100% !important;
}

.quick-compound-row {
  flex: 1 1 auto !important;
  display: flex !important;
  flex-wrap: wrap !important;
  align-items: center !important;
  gap: 0.5rem !important;
}

.formula-input-group {
  min-width: min(240px, 100%) !important;
}

/* =========================================================
  Visual Objects - Desktop Stabilizer
========================================================= */

.molecule-canvas,
.molecule-display {
  width: 100% !important;
  height: 100% !important;
}

.molecule-structure {
  width: 620px !important;
  height: 420px !important;
  transform: none !important;
}

.digital-scale {
  width: 420px !important;
  height: 360px !important;
  transform: translateY(-46px) !important;
}

.avogadro-package-area {
  width: min(620px, 94%) !important;
  min-height: 280px !important;
}

.gas-cylinder-large {
  width: 260px !important;
  height: 430px !important;
}

.beaker-large {
  width: 330px !important;
  height: 430px !important;
}

.mass-percent-chart {
  width: min(680px, 100%) !important;
  min-height: 430px !important;
  display: grid !important;
  grid-template-columns: 320px minmax(0, 1fr) !important;
  align-items: center !important;
  gap: clamp(1.25rem, 2vw, 2rem) !important;
}

.composition-donut {
  width: 270px !important;
  height: 270px !important;
  aspect-ratio: 1 / 1 !important;
}

.conversion-flow {
  left: 1.25rem !important;
  right: 1.25rem !important;
  bottom: 1.25rem !important;
  gap: 0.75rem !important;
  flex-wrap: wrap !important;
}

.flow-card {
  min-width: 130px !important;
}

/* =========================================================
  Concentration
========================================================= */

.concentration-tabs {
  position: absolute !important;
  top: 88px !important;
  left: 50% !important;
  z-index: 9 !important;
  display: flex !important;
  max-width: calc(100% - 2rem) !important;
  overflow-x: auto !important;
  gap: 0.5rem !important;
  transform: translateX(-50%) !important;
  -webkit-overflow-scrolling: touch !important;
}

.concentration-tabs .mini-tab {
  min-width: 108px !important;
  flex: 0 0 auto !important;
}

.concentration-lab-panel .simulation-stage {
  inset: 142px 1.25rem 188px !important;
}

.concentration-controls,
.concentration-controls[data-active-tab="molarity"],
.concentration-controls[data-active-tab="molality"],
.concentration-controls[data-active-tab="mole-fraction"] {
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto !important;
  align-items: end !important;
  width: 100% !important;
}

.concentration-field {
  display: none !important;
}

.concentration-controls[data-active-tab="molarity"] .concentration-field-molarity,
.concentration-controls[data-active-tab="molality"] .concentration-field-molality,
.concentration-controls[data-active-tab="mole-fraction"] .concentration-field-fraction {
  display: grid !important;
}

.molarity-volume-card,
.molality-solvent-card,
.fraction-total-card,
.fraction-mixture-panel {
  width: 220px !important;
}

/* =========================================================
  Game
========================================================= */

.game-menu {
  min-height: calc(100dvh - var(--header-height)) !important;
  padding: clamp(1rem, 4vw, 3rem) var(--responsive-page-padding) !important;
}

.game-menu.is-active {
  display: grid !important;
}

.level-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)) !important;
  gap: clamp(0.9rem, 1.6vw, 1.25rem) !important;
}

.level-card,
.level-card-wide {
  min-height: 260px !important;
}

.level-card-wide {
  grid-column: auto !important;
}

.game-status-bar {
  display: flex !important;
  flex-wrap: wrap !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 0.75rem !important;
  text-align: left !important;
}

.game-board {
  min-height: 650px !important;
  display: grid !important;
  grid-template-columns: minmax(360px, 480px) minmax(0, 1fr) !important;
  gap: clamp(1rem, 1.6vw, 1.5rem) !important;
  align-items: stretch !important;
  padding: clamp(0.9rem, 1.6vw, 1.25rem) !important;
}

.game-visual-panel,
.game-challenge-panel {
  min-height: 560px !important;
}

.answer-grid {
  display: flex !important;
  flex-wrap: wrap !important;
  justify-content: center !important;
  gap: 0.75rem !important;
}

.answer-button {
  min-width: 116px !important;
  min-height: 56px !important;
}

.number-answer-row {
  width: auto !important;
  display: inline-flex !important;
  flex-wrap: wrap !important;
}

.number-answer-row input {
  width: 150px !important;
  height: 62px !important;
}

/* =========================================================
  Desktop Medium
========================================================= */

@media (max-width: 1280px) {
  :root {
    --side-panel-width: 340px;
    --workspace-max-width: 1220px;
  }

  .workspace-two-columns {
    grid-template-columns: minmax(650px, 1fr) minmax(310px, var(--side-panel-width)) !important;
  }

  .lab-panel {
    min-height: 700px !important;
  }

  .molecule-structure {
    width: 560px !important;
    height: 390px !important;
  }
}

/* =========================================================
  Tablet
========================================================= */

@media (max-width: 1100px) {
  :root {
    --side-panel-width: 320px;
    --workspace-max-width: 940px;
  }

  .workspace-two-columns {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .side-panel-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  .lab-panel {
    min-height: 700px !important;
  }

  .simulation-stage {
    inset: 92px 1rem 168px !important;
  }

  .molecule-structure {
    width: min(620px, 92%) !important;
    height: 420px !important;
  }

  .game-board {
    grid-template-columns: 1fr !important;
    min-height: auto !important;
  }

  .game-visual-panel,
  .game-challenge-panel {
    min-height: 420px !important;
  }
}

/* =========================================================
  Tablet Kecil / HP Landscape
========================================================= */

@media (max-width: 820px) {
  :root {
    --header-height: 118px;
  }

  .app-header {
    grid-template-columns: 1fr auto !important;
    grid-template-areas:
      "brand actions"
      "tabs tabs" !important;
    align-items: center !important;
  }

  .brand {
    grid-area: brand !important;
  }

  .main-tabs {
    grid-area: tabs !important;
  }

  .header-actions {
    grid-area: actions !important;
  }

  .side-panel-stack {
    grid-template-columns: 1fr !important;
  }

  .experiment-control-panel {
    align-items: stretch !important;
  }

  .grid-controls,
  .concentration-controls,
  .concentration-controls[data-active-tab="molarity"],
  .concentration-controls[data-active-tab="molality"],
  .concentration-controls[data-active-tab="mole-fraction"] {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  .experiment-control-panel .btn,
  .grid-controls .btn,
  .concentration-controls .btn {
    grid-column: 1 / -1 !important;
  }

  .mass-percent-chart {
    grid-template-columns: 1fr !important;
    justify-items: center !important;
    min-height: 520px !important;
  }
}

/* =========================================================
  HP Portrait
========================================================= */

@media (max-width: 560px) {
  :root {
    --header-height: 112px;
    --responsive-page-padding: 0.75rem;
  }

  .app-header {
    padding: 0.65rem 0.75rem !important;
  }

  .brand-icon {
    width: 38px !important;
    min-width: 38px !important;
    height: 38px !important;
  }

  .brand small {
    display: none !important;
  }

  .header-actions .btn:not(.icon-button) {
    display: none !important;
  }

  .home-screen {
    min-height: 100dvh !important;
    overflow-y: auto !important;
  }

  .home-hero-visual {
    display: none !important;
  }

  .mode-card-grid,
  .mode-card-grid-large,
  .level-grid {
    grid-template-columns: 1fr !important;
  }

  .mode-card,
  .level-card {
    min-height: 230px !important;
  }

  .app-main {
    padding: 0.75rem !important;
  }

  .lab-panel {
    min-height: auto !important;
    overflow: visible !important;
    display: grid !important;
    gap: 0.85rem !important;
    padding-bottom: 0.85rem !important;
  }

  .lab-toolbar {
    position: relative !important;
    top: auto !important;
    left: auto !important;
    right: auto !important;
    padding: 0.85rem !important;
    flex-direction: column !important;
  }

  .simulation-stage {
    position: relative !important;
    inset: auto !important;
    min-height: 380px !important;
    margin: 0 0.85rem !important;
    overflow: hidden !important;
  }

  .experiment-control-panel {
    position: relative !important;
    left: auto !important;
    right: auto !important;
    bottom: auto !important;
    margin: 0 0.85rem !important;
    flex-direction: column !important;
    align-items: stretch !important;
  }

  .grid-controls,
  .concentration-controls,
  .concentration-controls[data-active-tab="molarity"],
  .concentration-controls[data-active-tab="molality"],
  .concentration-controls[data-active-tab="mole-fraction"] {
    grid-template-columns: 1fr !important;
    width: auto !important;
  }

  .quick-compound-row {
    width: 100% !important;
  }

  .chip-button,
  .mini-tab,
  .btn {
    min-height: 44px !important;
  }

  .molecule-element-breakdown {
    display: none !important;
  }

  .molecule-formula-badge {
    bottom: 0.85rem !important;
    font-size: 1.55rem !important;
  }

  .molecule-structure {
    width: 620px !important;
    height: 420px !important;
    transform: scale(0.62) !important;
    transform-origin: center center !important;
  }

  .digital-scale {
    width: 420px !important;
    height: 360px !important;
    transform: scale(0.72) translateY(-20px) !important;
    transform-origin: center center !important;
  }

  .conversion-flow {
    position: relative !important;
    left: auto !important;
    right: auto !important;
    bottom: auto !important;
    margin-top: 0.75rem !important;
  }

  .gas-cylinder-large {
    width: 230px !important;
    height: 350px !important;
  }

  .beaker-large {
    width: 250px !important;
    height: 350px !important;
  }

  .concentration-tabs {
    position: relative !important;
    top: auto !important;
    left: auto !important;
    transform: none !important;
    margin: 0.75rem auto !important;
    width: calc(100% - 1.7rem) !important;
  }

  .concentration-lab-panel .simulation-stage {
    inset: auto !important;
  }

  .molarity-volume-card,
  .molality-solvent-card,
  .fraction-total-card,
  .fraction-mixture-panel,
  .solvent-scale-mini {
    display: none !important;
  }

  .volume-meter,
  .concentration-meter {
    right: 0.85rem !important;
    bottom: 0.85rem !important;
    min-width: 160px !important;
  }

  .mass-percent-chart {
    min-height: auto !important;
    grid-template-columns: 1fr !important;
  }

  .composition-donut {
    width: 220px !important;
    height: 220px !important;
  }

  .game-board {
    grid-template-columns: 1fr !important;
    min-height: auto !important;
  }

  .game-visual-panel,
  .game-challenge-panel {
    min-height: 360px !important;
  }

  .challenge-title {
    font-size: clamp(1.8rem, 8vw, 2.4rem) !important;
  }

  .answer-button {
    width: 100% !important;
  }

  .number-answer-row,
  .number-answer-row input,
  .number-answer-row .btn {
    width: 100% !important;
  }
}

/* =========================================================
  HP Sangat Kecil
========================================================= */

@media (max-width: 380px) {
  .tab-button {
    font-size: 0.78rem !important;
    padding-inline: 0.65rem !important;
  }

  .home-title {
    font-size: 2.35rem !important;
  }

  .mode-preview,
  .level-preview {
    transform: scale(0.9) !important;
  }

  .molecule-structure {
    transform: scale(0.56) !important;
  }

  .digital-scale {
    transform: scale(0.66) translateY(-20px) !important;
  }

  .game-result-card {
    padding: 1.25rem !important;
  }
}