/* Material 3 components: buttons, chips, cards, lists, fields, dialog, snackbar, navigation. */

/* ------------------------------------------------------------ State layer + ripple */
.btn, .icon-btn, .seg-btn, .nav-item, .chip-action, .menu-item, .avatar-btn, .list-item[data-clickable] {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  -webkit-tap-highlight-color: transparent;
}
.btn::before, .icon-btn::before, .seg-btn::before, .nav-item::before, .chip-action::before, .menu-item::before, .avatar-btn::before, .list-item[data-clickable]::before {
  content: "";
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  z-index: -1;
  transition: opacity var(--md-sys-motion-duration-short2) linear;
  pointer-events: none;
}
@media (hover: hover) {
  :is(.btn, .icon-btn, .seg-btn, .nav-item, .chip-action, .menu-item, .avatar-btn, .list-item[data-clickable]):hover:not(:disabled)::before { opacity: var(--state-hover); }
}
:is(.btn, .icon-btn, .seg-btn, .nav-item, .chip-action, .menu-item, .avatar-btn, .list-item[data-clickable]):focus-visible::before { opacity: var(--state-focus); }
:is(.btn, .icon-btn, .seg-btn, .nav-item, .chip-action, .menu-item, .avatar-btn, .list-item[data-clickable]):active:not(:disabled)::before { opacity: var(--state-press); }

.ripple {
  position: absolute;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.16;
  transform: scale(0);
  pointer-events: none;
  z-index: -1;
  animation: ripple 550ms var(--md-sys-motion-easing-emphasized-decelerate) forwards;
}
@keyframes ripple { to { transform: scale(1); opacity: 0; } }

/* ------------------------------------------------------------ Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 24px;
  border: 0;
  border-radius: var(--shape-full);
  font: 500 0.875rem/1.25rem var(--font-brand);
  letter-spacing: 0.00625rem;
  white-space: nowrap;
  /* Expressive: the shape tightens on press (spring) */
  transition:
    border-radius var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial),
    background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    opacity var(--md-sys-motion-duration-short4) linear;
}
.btn:active:not(:disabled) { border-radius: var(--shape-md); }
.btn:disabled { cursor: default; opacity: 0.38; }
.btn:has(> [data-icon]:first-child), .btn:has(> [data-slot]:first-child), .btn:has(> .icon:first-child) { padding-inline-start: 16px; }
[data-icon] { display: inline-flex; }

.btn-filled { background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); }
.btn-tonal { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.btn-error { background: var(--md-sys-color-error-container); color: var(--md-sys-color-on-error-container); }
.btn-text { background: transparent; color: var(--md-sys-color-primary); padding: 0 12px; }
.btn-outlined { background: transparent; color: var(--md-sys-color-primary); box-shadow: inset 0 0 0 1px var(--md-sys-color-outline); }
.btn-wide { width: 100%; min-height: 56px; font-size: 1rem; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: var(--shape-full);
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  transition: border-radius var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial),
    background-color var(--md-sys-motion-duration-short4) linear;
}
.icon-btn:active { border-radius: var(--shape-md); }
.icon-btn:disabled { opacity: 0.38; cursor: default; }
.icon-btn.tonal { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
/* 48 px touch target without enlarging the visual element */
@media (pointer: coarse) {
  .icon-btn::after { content: ""; position: absolute; inset: -4px; }
}

/* Segmented button */
.seg { display: inline-flex; border-radius: var(--shape-full); box-shadow: inset 0 0 0 1px var(--md-sys-color-outline); overflow: hidden; }
.seg-btn {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 40px; padding: 0 16px; border: 0; background: transparent;
  color: var(--md-sys-color-on-surface);
  font: 500 0.875rem/1.25rem var(--font-brand);
  transition: background-color var(--md-sys-motion-duration-short4) linear;
}
.seg-btn + .seg-btn { border-inline-start: 1px solid var(--md-sys-color-outline); }
.seg-btn[aria-pressed="true"] { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.seg-btn .icon { width: 1.125rem; height: 1.125rem; }

/* ------------------------------------------------------------ Chips */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 32px; padding: 0 12px;
  border-radius: var(--shape-sm);
  background: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface-variant);
  font: 500 0.75rem/1rem var(--font-brand);
  letter-spacing: 0.03125rem;
  white-space: nowrap;
  max-width: 100%;
}
.chip .icon { width: 1.125rem; height: 1.125rem; }
.chip-primary { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); }
.chip-secondary { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.chip-warning { background: var(--md-sys-color-warning-container); color: var(--md-sys-color-on-warning-container); }
.chip-error { background: var(--md-sys-color-error-container); color: var(--md-sys-color-on-error-container); }
.chip-action { border: 0; cursor: pointer; text-align: start; }
.chip-text { overflow: hidden; text-overflow: ellipsis; }

/* ------------------------------------------------------------ Cards */
.card {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-radius: var(--shape-xl);
  background: var(--md-sys-color-surface-container);
  overflow: hidden;
}
.card-head {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 16px 8px 24px;
  min-height: 56px;
}
.card-title { flex: 1; min-width: 0; color: var(--md-sys-color-on-surface); }
.card-body { flex: 1; min-height: 0; padding: 0 8px 8px; }
.card-scroll { overflow-y: auto; overscroll-behavior: contain; }

/* ------------------------------------------------------------ Lists */
.list { list-style: none; margin: 0; padding: 0; }
.list-item {
  display: flex; align-items: center; gap: 16px;
  min-height: 56px; padding: 8px 16px;
  border-radius: var(--shape-lg);
  color: var(--md-sys-color-on-surface);
}
.list-item[data-clickable] { cursor: pointer; }
.list-text { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.list-text > * { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list-text .supporting { color: var(--md-sys-color-on-surface-variant); }
.list-trailing { display: flex; align-items: center; gap: 8px; color: var(--md-sys-color-on-surface-variant); flex: none; }
.list-item.entering { animation: item-in var(--md-sys-motion-spring-default-spatial-duration) var(--md-sys-motion-spring-default-spatial); }
@keyframes item-in { from { opacity: 0; transform: scale(0.92); } }

.avatar {
  width: 40px; height: 40px; flex: none;
  border-radius: var(--shape-md);
  background: var(--md-sys-color-surface-container-highest);
  object-fit: cover;
}
/* Tiny pixel-art icons stay crisp when scaled up (set from JS once the image has loaded). */
.avatar.pixel { image-rendering: pixelated; }
.avatar-icon {
  display: grid; place-items: center;
  width: 40px; height: 40px; flex: none;
  border-radius: var(--shape-md);
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}
.op-badge { color: var(--md-sys-color-tertiary); }

.empty {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 32px 16px; text-align: center;
  color: var(--md-sys-color-on-surface-variant);
}
.empty .icon { width: 2.5rem; height: 2.5rem; opacity: 0.7; }

/* Properties: label + value */
.prop-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 6px 16px; min-height: 44px; }
.prop-row > .label { color: var(--md-sys-color-on-surface-variant); }

/* ------------------------------------------------------------ Text fields (outlined) */
.field { position: relative; display: block; --field-bg: var(--md-sys-color-surface-container); }
.field input {
  width: 100%; height: 56px; padding: 0 16px;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--shape-xs);
  background: transparent;
  color: var(--md-sys-color-on-surface);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--md-sys-motion-duration-short4) linear, box-shadow var(--md-sys-motion-duration-short4) linear;
}
.field input:hover { border-color: var(--md-sys-color-on-surface); }
.field input:focus { border-color: var(--md-sys-color-primary); box-shadow: inset 0 0 0 1px var(--md-sys-color-primary); }
.field.has-trailing input { padding-inline-end: 52px; }
.field-label {
  position: absolute; inset-inline-start: 12px; top: 28px;
  padding: 0 4px; transform: translateY(-50%);
  background: var(--field-bg);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1rem; line-height: 1.5rem;
  pointer-events: none;
  transform-origin: left center;
  transition: top var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial),
    font-size var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial),
    color var(--md-sys-motion-duration-short4) linear;
}
.field input:focus + .field-label,
.field input:not(:placeholder-shown) + .field-label { top: 0; font-size: 0.75rem; line-height: 1rem; }
.field input:focus + .field-label { color: var(--md-sys-color-primary); }
.field.invalid input { border-color: var(--md-sys-color-error); box-shadow: inset 0 0 0 1px var(--md-sys-color-error); }
.field.invalid .field-label { color: var(--md-sys-color-error); }
.field-trailing { position: absolute; inset-inline-end: 8px; top: 8px; }
.field-error { min-height: 1.25rem; padding: 0 16px; color: var(--md-sys-color-error); }

/* ------------------------------------------------------------ Spinner */
.spin { animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ------------------------------------------------------------ Dialog */
.dialog {
  width: min(calc(100vw - 48px), 312px);
  max-width: 560px; padding: 24px;
  border: 0; border-radius: var(--shape-xl);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  box-shadow: var(--elevation-3);
}
.dialog[open] { animation: dialog-in var(--md-sys-motion-spring-default-spatial-duration) var(--md-sys-motion-spring-default-spatial); }
.dialog::backdrop { background: color-mix(in srgb, var(--md-sys-color-scrim) 32%, transparent); animation: fade-in var(--md-sys-motion-duration-medium2) linear; }
@keyframes dialog-in { from { opacity: 0; transform: translateY(24px) scale(0.92); } }
@keyframes fade-in { from { opacity: 0; } }
.dialog-icon { display: flex; justify-content: center; color: var(--md-sys-color-secondary); margin: 0 auto 16px; }
.dialog h2 { text-align: center; color: var(--md-sys-color-on-surface); margin-bottom: 16px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 24px; }

/* ------------------------------------------------------------ Snackbar */
.snackbar {
  position: fixed; inset-inline: 0; z-index: 50;
  bottom: calc(var(--snackbar-offset, 0px) + var(--safe-bottom) + 16px);
  display: flex; justify-content: center; padding: 0 var(--gutter);
  pointer-events: none;
}
.snackbar-box {
  display: flex; align-items: center; gap: 12px;
  min-height: 48px; max-width: 560px; padding: 8px 16px;
  border-radius: var(--shape-md);
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  box-shadow: var(--elevation-3);
  pointer-events: auto;
  animation: snack-in var(--md-sys-motion-spring-default-spatial-duration) var(--md-sys-motion-spring-default-spatial);
}
.snackbar-box.leaving { animation: snack-out var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-emphasized-accelerate) forwards; }
.snackbar-box .icon { color: var(--md-sys-color-inverse-primary); }
@keyframes snack-in { from { opacity: 0; transform: translateY(24px) scale(0.9); } }
@keyframes snack-out { to { opacity: 0; transform: translateY(8px); } }

/* ------------------------------------------------------------ Navigation bar (compact) */
.nav-bar {
  display: flex; justify-content: space-around;
  padding: 12px 8px calc(16px + var(--safe-bottom));
  padding-inline: max(8px, var(--safe-left)) max(8px, var(--safe-right));
  background: var(--md-sys-color-surface-container);
}
.nav-item {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px;
  border: 0; background: transparent; padding: 0; min-width: 0;
  color: var(--md-sys-color-on-surface-variant);
  border-radius: var(--shape-lg);
}
.nav-item::before { display: none; }
.nav-indicator {
  position: relative; display: grid; place-items: center;
  width: 64px; height: 32px; border-radius: var(--shape-full);
  overflow: hidden; isolation: isolate;
}
.nav-indicator::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  border-radius: inherit; background: var(--md-sys-color-secondary-container);
  transform: scaleX(0.3); opacity: 0;
  transition: transform var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial),
    opacity var(--md-sys-motion-duration-short2) linear;
}
.nav-item[aria-current="page"] { color: var(--md-sys-color-on-surface); }
.nav-item[aria-current="page"] .nav-indicator { color: var(--md-sys-color-on-secondary-container); }
.nav-item[aria-current="page"] .nav-indicator::before { transform: scaleX(1); opacity: 1; }
@media (hover: hover) { .nav-item:hover .nav-indicator::before { opacity: 1; transform: scaleX(1); background: var(--md-sys-color-surface-container-highest); } .nav-item[aria-current="page"]:hover .nav-indicator::before { background: var(--md-sys-color-secondary-container); } }
.nav-item .label { font: 500 0.75rem/1rem var(--font-brand); letter-spacing: 0.03125rem; }
.nav-item[aria-current="page"] .label { font-weight: 700; }

.seg-btn[aria-pressed="false"] [data-icon] { display: none; }
a.icon-btn { text-decoration: none; }


/* ------------------------------------------------------------ Avatar button + menus */
.avatar-btn {
  display: grid; place-items: center;
  width: 40px; height: 40px; flex: none; padding: 0;
  border: 0; border-radius: var(--shape-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font: 600 1rem/1 var(--font-brand);
  text-transform: uppercase;
  transition: border-radius var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
}
.avatar-btn:active { border-radius: var(--shape-md); }
.avatar-btn.avatar-static { width: 48px; height: 48px; font-size: 1.25rem; pointer-events: none; }

.menu {
  position: absolute; inset-inline-end: 0; top: calc(100% + 8px); z-index: 40;
  min-width: 232px; padding: 8px;
  border-radius: var(--shape-lg-inc);
  background: var(--md-sys-color-surface-container-high);
  box-shadow: var(--elevation-2);
  transform-origin: top right;
  animation: menu-in var(--md-sys-motion-spring-default-spatial-duration) var(--md-sys-motion-spring-default-spatial);
}
@keyframes menu-in { from { opacity: 0; transform: scale(0.86) translateY(-6px); } }

.menu-item {
  display: flex; align-items: center; gap: 12px;
  width: 100%; min-height: 48px; padding: 0 16px 0 12px;
  border: 0; border-radius: var(--shape-md);
  background: transparent; color: var(--md-sys-color-on-surface);
  font: 500 0.875rem/1.25rem var(--font-brand); letter-spacing: 0.00625rem;
  text-align: start;
  transition: background-color var(--md-sys-motion-duration-short4) linear;
}
.menu-item[aria-checked="true"] { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.menu-item .menu-check { margin-inline-start: auto; visibility: hidden; }
.menu-item[aria-checked="true"] .menu-check { visibility: visible; }
.menu-header { display: flex; align-items: center; gap: 12px; padding: 8px 12px 12px; }
.menu-divider { height: 1px; margin: 4px 8px; background: var(--md-sys-color-outline-variant); }

/* ------------------------------------------------------------ Tooltip (plain, M3) */
.tooltip {
  position: fixed; left: 0; top: 0; z-index: 100;
  max-width: min(280px, calc(100vw - 16px));
  padding: 4px 8px;
  border-radius: var(--shape-sm);
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  font: 400 0.75rem/1rem var(--font-brand); letter-spacing: 0.025rem;
  pointer-events: none;
  opacity: 0; transform: scale(0.9); transform-origin: var(--origin, top center);
  transition: opacity var(--md-sys-motion-duration-short2) linear,
    transform var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
}
.tooltip[data-open] { opacity: 1; transform: none; }