/* ==========================================================================
   PEN 11 DESIGN SYSTEM - 02-COMPONENTS.CSS
   Material Design 3 Components: Buttons, Cards, Chips, Badges, Sliders,
   Switches, Dialogs, Snackbars, Tables & Physical Keycap <kbd> Elements
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Material Design 3 Buttons
   Filled, Elevated, Tonal, Outlined, Text, Icon Buttons & FABs
   -------------------------------------------------------------------------- */
.m3-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 24px;
  border-radius: var(--md-sys-shape-corner-full);
  border: 1px solid transparent;
  font-family: var(--md-sys-typescale-label-large-font);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: var(--md-sys-typescale-label-large-weight);
  letter-spacing: var(--md-sys-typescale-label-large-tracking);
  line-height: var(--md-sys-typescale-label-large-line-height);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  vertical-align: middle;
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
  user-select: none;
  transition: background-color var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
              box-shadow var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
}

.m3-btn:disabled,
.m3-btn[disabled] {
  cursor: not-allowed;
  opacity: 0.38;
  pointer-events: none;
  box-shadow: none !important;
}

.m3-btn .material-symbols-rounded {
  font-size: 18px;
  width: 18px;
  height: 18px;
}

/* A. Filled Button (High Emphasis) */
.m3-btn-filled {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.m3-btn-filled:hover {
  box-shadow: var(--md-sys-elevation-level1);
}

/* B. Elevated Button */
.m3-btn-elevated {
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-primary);
  box-shadow: var(--md-sys-elevation-level1);
}

.m3-btn-elevated:hover {
  box-shadow: var(--md-sys-elevation-level2);
}

/* C. Filled Tonal Button (Medium Emphasis) */
.m3-btn-tonal {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.m3-btn-tonal:hover {
  box-shadow: var(--md-sys-elevation-level1);
}

/* D. Outlined Button */
.m3-btn-outlined {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border-color: var(--md-sys-color-outline);
}

.m3-btn-outlined:hover {
  border-color: var(--md-sys-color-outline);
  background-color: var(--md-sys-color-surface-variant);
}

/* E. Text Button (Low Emphasis) */
.m3-btn-text {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  padding: 0 12px;
}

/* F. Floating Action Buttons (FAB) */
.m3-fab {
  width: 56px;
  height: 56px;
  border-radius: var(--md-sys-shape-corner-large);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--md-sys-elevation-level3);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized),
              box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized);
}

.m3-fab:hover {
  box-shadow: var(--md-sys-elevation-level4);
  transform: translateY(-2px);
}

.m3-fab .material-symbols-rounded {
  font-size: 24px;
}

.m3-fab-extended {
  height: 56px;
  padding: 0 20px;
  border-radius: var(--md-sys-shape-corner-large);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--md-sys-typescale-label-large-font);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 600;
  box-shadow: var(--md-sys-elevation-level3);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized),
              box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized);
}

.m3-fab-extended:hover {
  box-shadow: var(--md-sys-elevation-level4);
  transform: translateY(-2px);
}

/* G. Icon Buttons */
.m3-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-full);
  border: none;
  background-color: transparent;
  color: var(--md-sys-color-on-surface-variant);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
}

.m3-icon-btn.filled {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.m3-icon-btn.tonal {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.m3-icon-btn.outlined {
  border: 1px solid var(--md-sys-color-outline);
}

/* --------------------------------------------------------------------------
   2. Surface Container Cards
   Elevated, Filled, Outlined
   -------------------------------------------------------------------------- */
.m3-card {
  border-radius: var(--md-sys-shape-corner-large);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--md-sys-motion-duration-medium1) var(--md-sys-motion-easing-emphasized),
              box-shadow var(--md-sys-motion-duration-medium1) var(--md-sys-motion-easing-emphasized),
              border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.m3-card-elevated {
  background-color: var(--md-sys-color-surface-container-low);
  box-shadow: var(--md-sys-elevation-level1);
}

.m3-card-elevated:hover {
  box-shadow: var(--md-sys-elevation-level2);
  transform: translateY(-2px);
}

.m3-card-filled {
  background-color: var(--md-sys-color-surface-container-highest);
  border: none;
}

.m3-card-filled:hover {
  box-shadow: var(--md-sys-elevation-level1);
  transform: translateY(-2px);
}

.m3-card-outlined {
  background-color: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.m3-card-outlined:hover {
  border-color: var(--md-sys-color-outline);
  box-shadow: var(--md-sys-elevation-level1);
  transform: translateY(-2px);
}

.m3-card-media {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: var(--md-sys-color-surface-variant);
}

.m3-card-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.m3-card-title {
  font-family: var(--md-sys-typescale-title-large-font);
  font-size: var(--md-sys-typescale-title-large-size);
  font-weight: var(--md-sys-typescale-title-large-weight);
  color: var(--md-sys-color-on-surface);
  margin: 0;
}

.m3-card-subhead {
  font-family: var(--md-sys-typescale-title-small-font);
  font-size: var(--md-sys-typescale-title-small-size);
  color: var(--md-sys-color-on-surface-variant);
  margin: 0;
}

.m3-card-body {
  font-family: var(--md-sys-typescale-body-medium-font);
  font-size: var(--md-sys-typescale-body-medium-size);
  color: var(--md-sys-color-on-surface-variant);
  line-height: var(--md-sys-typescale-body-medium-line-height);
  margin: 0;
}

.m3-card-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 8px 16px 16px;
}

/* --------------------------------------------------------------------------
   3. Chips (Assist, Filter, Input, Suggestion)
   -------------------------------------------------------------------------- */
.m3-chip {
  height: 32px;
  padding: 0 16px;
  border-radius: var(--md-sys-shape-corner-small);
  border: 1px solid var(--md-sys-color-outline);
  background-color: transparent;
  color: var(--md-sys-color-on-surface);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--md-sys-typescale-label-large-font);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 500;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  user-select: none;
  transition: all var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
}

.m3-chip .material-symbols-rounded {
  font-size: 18px;
  color: var(--md-sys-color-primary);
}

.m3-chip:hover {
  background-color: rgba(124, 92, 53, 0.08);
}

.m3-chip.active,
.m3-chip-selected {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  border-color: transparent;
}

.m3-chip.active .material-symbols-rounded,
.m3-chip-selected .material-symbols-rounded {
  color: var(--md-sys-color-on-secondary-container);
}

/* --------------------------------------------------------------------------
   4. Badges (Dot & Numeric)
   -------------------------------------------------------------------------- */
.m3-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-error);
  color: var(--md-sys-color-on-error);
  font-family: var(--md-sys-typescale-label-small-font);
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
}

.m3-badge-dot {
  width: 6px;
  height: 6px;
  min-width: 6px;
  padding: 0;
  border-radius: 50%;
}

.m3-badge-pill {
  min-height: 24px;
  height: auto;
  padding: 4px 12px;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.35;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  max-width: 100%;
  box-sizing: border-box;
  text-align: center;
  word-break: break-word;
}

@media (max-width: 360px) {
  .m3-badge-pill {
    font-size: 11px;
    padding: 3px 8px;
    gap: 4px;
  }
}

/* --------------------------------------------------------------------------
   5. Switches, Sliders & Inputs
   -------------------------------------------------------------------------- */
/* Switch */
.m3-switch {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.m3-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.m3-switch-track {
  width: 52px;
  height: 32px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-highest);
  border: 2px solid var(--md-sys-color-outline);
  position: relative;
  box-sizing: border-box;
  transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.m3-switch-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--md-sys-color-outline);
  position: absolute;
  top: 6px;
  left: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized),
              width var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized),
              height var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized),
              background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              top var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized);
}

.m3-switch input:checked + .m3-switch-track {
  background-color: var(--md-sys-color-primary);
  border-color: var(--md-sys-color-primary);
}

.m3-switch input:checked + .m3-switch-track .m3-switch-thumb {
  transform: translateX(20px);
  width: 24px;
  height: 24px;
  top: 2px;
  left: 4px;
  background-color: var(--md-sys-color-on-primary);
}

/* Slider */
.m3-slider-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.m3-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 16px;
  background: transparent;
  cursor: pointer;
}

.m3-slider:focus {
  outline: none;
}

.m3-slider::-webkit-slider-runnable-track {
  width: 100%;
  height: 6px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-highest);
}

.m3-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 20px;
  width: 20px;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  cursor: pointer;
  margin-top: -7px;
  box-shadow: var(--md-sys-elevation-level1);
  transition: transform var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
}

.m3-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* --------------------------------------------------------------------------
   6. Modals, Dialogs & Toast Snackbars
   -------------------------------------------------------------------------- */
.m3-dialog-scrim {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized),
              visibility var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
}

.m3-dialog-scrim.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.m3-dialog {
  background-color: var(--md-sys-color-surface-container-high);
  border-radius: var(--md-sys-shape-corner-extra-large);
  width: 100%;
  max-width: 560px;
  padding: 24px;
  box-shadow: var(--md-sys-elevation-level3);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform: scale(0.92);
  transition: transform var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized-decelerate);
}

.m3-dialog-scrim.active .m3-dialog {
  transform: scale(1);
}

.m3-dialog-title {
  font-family: var(--md-sys-typescale-headline-small-font);
  font-size: var(--md-sys-typescale-headline-small-size);
  font-weight: var(--md-sys-typescale-headline-small-weight);
  color: var(--md-sys-color-on-surface);
}

.m3-dialog-content {
  font-family: var(--md-sys-typescale-body-medium-font);
  font-size: var(--md-sys-typescale-body-medium-size);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
}

.m3-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

/* Toast Snackbar */
.m3-snackbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  min-width: 280px;
  max-width: min(560px, calc(100vw - 32px));
  width: auto;
  min-height: 48px;
  padding: 8px 16px;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  box-shadow: var(--md-sys-elevation-level3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  box-sizing: border-box;
  transition: transform var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized-decelerate),
              opacity var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized-decelerate),
              visibility var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized-decelerate);
}

.m3-snackbar.active {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.m3-snackbar-content {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.m3-snackbar-text {
  font-size: 13.5px;
  line-height: 1.4;
  word-break: break-word;
  overflow-wrap: break-word;
  color: inherit;
}

.m3-snackbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  margin-left: auto;
}

@media (max-width: 839px) {
  .m3-snackbar {
    bottom: calc(76px + env(safe-area-inset-bottom, 0px));
    width: calc(100% - 24px);
    max-width: calc(100vw - 24px);
    padding: 10px 14px;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .m3-snackbar {
    flex-wrap: wrap;
    align-items: flex-start;
    padding: 12px 14px;
  }
  .m3-snackbar-actions {
    width: 100%;
    justify-content: flex-end;
    margin-top: 4px;
    padding-top: 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }
}

/* --------------------------------------------------------------------------
   7. Hotkey Data Table & Physical Keycap <kbd> Styling
   -------------------------------------------------------------------------- */
.m3-table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--md-sys-shape-corner-large);
  border: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface);
}

.m3-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-family: var(--md-sys-typescale-body-medium-font);
  font-size: var(--md-sys-typescale-body-medium-size);
}

.m3-table th {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  padding: 16px 20px;
  font-family: var(--md-sys-typescale-title-small-font);
  font-weight: 700;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.m3-table td {
  padding: 14px 20px;
  color: var(--md-sys-color-on-surface-variant);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  vertical-align: middle;
}

.m3-table tr:last-child td {
  border-bottom: none;
}

.m3-table tbody tr:hover td {
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface);
}

/* Physical 3D Tactile Keycap <kbd> */
kbd, .m3-kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  padding: 0 7px;
  font-family: var(--md-sys-typescale-font-mono);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  color: var(--md-sys-color-on-surface);
  background: linear-gradient(180deg, var(--md-sys-color-surface-container-lowest) 0%, var(--md-sys-color-surface-container) 100%);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-bottom: 2px solid var(--md-sys-color-outline);
  border-radius: 6px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
  vertical-align: middle;
  user-select: none;
  transition: transform 60ms ease, box-shadow 60ms ease, border-bottom-width 60ms ease;
}

[data-theme="dark"] kbd,
[data-theme="dark"] .m3-kbd {
  background: linear-gradient(180deg, var(--md-sys-color-surface-container-high) 0%, var(--md-sys-color-surface-container-low) 100%);
  border-color: var(--md-sys-color-outline);
  border-bottom-color: rgba(0, 0, 0, 0.7);
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.5);
}

kbd:active, .m3-kbd:active {
  transform: translateY(1px);
  border-bottom-width: 1px;
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.2);
}

.m3-kbd-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   SYSTEM REQUIREMENTS CALLOUT CARD
   ========================================================================== */
.m3-sys-req-card {
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 20px 24px;
  max-width: 860px;
  margin: 28px auto 0 auto;
  box-shadow: var(--md-sys-elevation-level1);
  transition: box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.m3-sys-req-card:hover {
  box-shadow: var(--md-sys-elevation-level2);
}

.sys-req-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  flex-wrap: wrap;
}

.sys-req-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sys-req-title-wrap .material-symbols-rounded {
  color: var(--md-sys-color-primary);
  font-size: 22px;
}

.sys-req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 820px) {
  .sys-req-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .sys-req-grid {
    grid-template-columns: 1fr;
  }
}

.sys-req-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.sys-req-icon {
  color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface-container-highest);
  padding: 8px;
  border-radius: var(--md-sys-shape-corner-small);
  font-size: 18px;
  flex-shrink: 0;
}

.sys-req-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: left;
}

.sys-req-label {
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sys-req-val {
  color: var(--md-sys-color-on-surface);
  font-weight: 600;
  font-size: 13px;
  line-height: 1.35;
}

/* ==========================================================================
   Gallery Showcase Grid (Material Design 3)
   ========================================================================== */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 28px;
  width: 100%;
}

.gallery-card {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-extra-large);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 300ms cubic-bezier(0.2, 0, 0, 1), box-shadow 300ms cubic-bezier(0.2, 0, 0, 1), background-color 150ms ease;
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--md-sys-elevation-level1);
}

.gallery-card:hover {
  transform: translateY(-4px) scale(1.015);
  box-shadow: var(--md-sys-elevation-level3);
}

.gallery-img-wrapper {
  width: 100%;
  height: 280px;
  background-color: var(--md-sys-color-surface-container-highest);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 24px;
}

.gallery-img-wrapper img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--md-sys-shape-corner-medium);
  filter: drop-shadow(0 8px 24px rgba(74, 46, 20, 0.16));
  transition: filter 300ms ease, transform 300ms ease;
}

.gallery-card:hover .gallery-img-wrapper img {
  filter: drop-shadow(0 12px 32px rgba(74, 46, 20, 0.24));
  transform: scale(1.03);
}

.gallery-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.gallery-card-content h3 {
  margin: 0;
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
  font-size: 1.15rem;
}

.gallery-card-content p {
  margin: 0;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
  font-size: 0.92rem;
}

/* ==========================================================================
   Material Design 3 Download Preference Popup Modal
   ========================================================================== */
.m3-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(26, 15, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.2, 0, 0, 1), visibility 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.m3-modal-backdrop.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.m3-download-dialog {
  background-color: var(--md-sys-color-surface-container-high, #FAF6EC);
  border: 1px solid var(--md-sys-color-outline-variant, #E2D2B8);
  border-radius: var(--md-sys-shape-corner-extra-large, 28px);
  width: 100%;
  max-width: min(480px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 28px;
  box-shadow: 0 20px 48px rgba(74, 44, 0, 0.2);
  transform: scale(0.92) translateY(12px);
  transition: transform 0.28s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-sizing: border-box;
}

@media (max-width: 480px) {
  .m3-download-dialog {
    padding: 20px 16px;
    border-radius: 20px;
  }
}

.m3-modal-backdrop.active .m3-download-dialog {
  transform: scale(1) translateY(0);
}

.download-dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
}

.download-dialog-title {
  margin: 0 0 4px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface, #1A0F00);
}

.download-dialog-subtitle {
  margin: 0;
  font-size: 0.88rem;
  color: var(--md-sys-color-on-surface-variant, #5C4830);
}

.download-option-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1.5px solid var(--md-sys-color-outline-variant, #E2D2B8);
  background-color: var(--md-sys-color-surface, #FDFBF7);
  text-decoration: none;
  color: inherit;
  margin-bottom: 12px;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  cursor: pointer;
}

.download-option-card:hover {
  border-color: var(--md-sys-color-primary, #8C4E00);
  background-color: var(--md-sys-color-surface-container-highest, #F3E5CC);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(74, 44, 0, 0.08);
}

@media (max-width: 380px) {
  .download-option-card {
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 14px;
  }
}

.download-option-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.download-option-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: var(--md-sys-color-secondary-container, #F3DEB8);
  color: var(--md-sys-color-primary, #8C4E00);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.download-option-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--md-sys-color-on-surface, #1A0F00);
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-option-desc {
  font-size: 0.82rem;
  color: var(--md-sys-color-on-surface-variant, #6B553D);
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   14. Material Design 3 FAQ Accordion (<details>/<summary>)
   -------------------------------------------------------------------------- */
details.m3-card summary::-webkit-details-marker {
  display: none;
}

details.m3-card[open] summary .material-symbols-rounded {
  transform: rotate(180deg);
}

details.m3-card:hover {
  background-color: var(--md-sys-color-surface-container-high) !important;
  border-color: var(--md-sys-color-primary) !important;
}

details.m3-card:focus-within {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}