/* =========================================================================
   Lich Am Duong — Components (Material Design 3)
   ========================================================================= */

.icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-fill { fill: currentColor; stroke: none; }
.icon-sm { width: 18px; height: 18px; }
.icon-lg { width: 32px; height: 32px; }

/* =========================== App shell =========================== */
.app-shell { min-height: 100%; display: flex; flex-direction: column; }

.top-app-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 64px;
  padding: 0 12px;
  background: color-mix(in srgb, var(--surface-container) 92%, transparent);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid var(--outline-variant);
}
.top-app-bar__brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.top-app-bar__logo {
  width: 38px; height: 38px; border-radius: var(--shape-md);
  background: linear-gradient(155deg, var(--primary), color-mix(in srgb, var(--primary) 60%, #5a0c02));
  display: flex; align-items: center; justify-content: center;
  color: var(--on-primary); flex-shrink: 0;
  box-shadow: var(--elev-1);
}
.top-app-bar__logo .icon { width: 22px; height: 22px; }
.top-app-bar__titles { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.top-app-bar__title { font-weight: 700; font-size: 1.05rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.top-app-bar__subtitle { font-size: .72rem; color: var(--on-surface-variant); white-space: nowrap; }
.top-app-bar__spacer { flex: 1 1 auto; }
.top-app-bar__actions { display: flex; align-items: center; gap: 4px; }

.main-content {
  flex: 1 1 auto;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* =========================== Icon button =========================== */
.icon-btn {
  position: relative;
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--shape-full);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--on-surface-variant);
  isolation: isolate;
}
.icon-btn::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: currentColor; opacity: 0; transition: opacity var(--motion-fast) var(--ease-standard);
}
.icon-btn:hover::before { opacity: var(--state-hover); }
.icon-btn:active::before { opacity: var(--state-press); }
.icon-btn[aria-pressed="true"], .icon-btn.is-active {
  background: var(--secondary-container);
  color: var(--on-secondary-container);
}
.icon-btn .dot-badge {
  position: absolute; top: 6px; right: 6px; width: 8px; height: 8px;
  border-radius: 50%; background: var(--error); border: 1.5px solid var(--surface-container);
}

/* =========================== Buttons =========================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 24px;
  border-radius: var(--shape-full);
  border: none; cursor: pointer;
  font-weight: 600; font-size: .875rem; letter-spacing: .1px;
  position: relative; isolation: isolate; white-space: nowrap;
  transition: box-shadow var(--motion-fast) var(--ease-standard);
}
.btn::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: currentColor; opacity: 0; transition: opacity var(--motion-fast) var(--ease-standard);
}
.btn:hover::before { opacity: var(--state-hover); }
.btn:active::before { opacity: var(--state-press); }
.btn .icon { width: 18px; height: 18px; }

.btn-filled { background: var(--primary); color: var(--on-primary); }
.btn-tonal { background: var(--secondary-container); color: var(--on-secondary-container); }
.btn-outlined { background: transparent; color: var(--primary); border: 1px solid var(--outline); }
.btn-text { background: transparent; color: var(--primary); padding: 0 12px; }
.btn-elevated { background: var(--surface-container-low); color: var(--primary); box-shadow: var(--elev-1); }
.btn:disabled { opacity: .38; cursor: not-allowed; pointer-events: none; }

.fab {
  width: 56px; height: 56px; border-radius: var(--shape-lg);
  background: var(--primary-container); color: var(--on-primary-container);
  display: inline-flex; align-items: center; justify-content: center;
  border: none; cursor: pointer; box-shadow: var(--elev-3);
  position: relative; isolation: isolate;
}
.fab::before { content:""; position:absolute; inset:0; border-radius:inherit; background:currentColor; opacity:0; transition: opacity var(--motion-fast); }
.fab:hover::before { opacity: var(--state-hover); }

/* =========================== Segmented buttons =========================== */
.segmented {
  display: inline-flex;
  border: 1px solid var(--outline);
  border-radius: var(--shape-full);
  overflow: hidden;
}
.segmented__btn {
  border: none; background: transparent; color: var(--on-surface);
  padding: 0 16px; height: 36px; font-size: .8125rem; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  border-right: 1px solid var(--outline);
  position: relative;
}
.segmented__btn:last-child { border-right: none; }
.segmented__btn .icon { width: 18px; height: 18px; }
.segmented__btn[aria-checked="true"] {
  background: var(--secondary-container); color: var(--on-secondary-container);
}
.segmented__btn:hover { background: color-mix(in srgb, var(--on-surface) 6%, transparent); }
.segmented__btn[aria-checked="true"]:hover { background: color-mix(in srgb, var(--secondary-container) 90%, var(--on-secondary-container) 10%); }

/* =========================== Switch =========================== */
.switch {
  --w: 52px; --h: 32px; --knob: 24px;
  position: relative; display: inline-block; width: var(--w); height: var(--h);
  flex-shrink: 0;
}
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; z-index: 2; }
.switch__track {
  position: absolute; inset: 0; border-radius: var(--shape-full);
  background: var(--surface-container-highest);
  border: 2px solid var(--outline);
  transition: background var(--motion-standard) var(--ease-standard), border-color var(--motion-standard);
}
.switch__knob {
  position: absolute; top: 50%; left: 4px; transform: translate(0,-50%);
  width: 16px; height: 16px; border-radius: 50%; background: var(--outline);
  transition: transform var(--motion-standard) var(--ease-emphasized), width var(--motion-fast), height var(--motion-fast), background var(--motion-standard);
  display: flex; align-items: center; justify-content: center;
}
.switch input:checked ~ .switch__track { background: var(--primary); border-color: var(--primary); }
.switch input:checked ~ .switch__knob {
  transform: translate(20px,-50%); background: var(--on-primary);
  width: var(--knob); height: var(--knob);
}
.switch input:focus-visible ~ .switch__track { outline: 2.5px solid var(--primary); outline-offset: 2px; }

/* =========================== Cards =========================== */
.card {
  background: var(--surface-container-low);
  border-radius: var(--shape-xl);
  padding: 20px;
}
.card-outlined { background: var(--surface); border: 1px solid var(--outline-variant); }
.card-elevated { background: var(--surface-container-low); box-shadow: var(--elev-1); }

/* Tet countdown banner */
.tet-card {
  position: relative; overflow: hidden;
  border-radius: var(--shape-xl);
  padding: 24px;
  background: linear-gradient(135deg, var(--tet-c1) 0%, var(--tet-c2) 55%, var(--tet-c3) 100%);
  color: var(--tet-on);
  display: flex; flex-direction: column; gap: 14px;
}
.tet-card::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 88% -10%, color-mix(in srgb, var(--tet-gold) 55%, transparent), transparent 60%);
  pointer-events: none;
}
.tet-card__head { display: flex; align-items: center; gap: 10px; position: relative; z-index: 1; }
.tet-card__head .icon { color: var(--tet-gold); }
.tet-card__row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; position: relative; z-index: 1; }
.tet-unit {
  background: rgba(255,255,255,.12);
  border-radius: var(--shape-md);
  padding: 10px 6px;
  text-align: center;
  backdrop-filter: blur(4px);
}
.tet-unit__num { font-size: 1.9rem; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.tet-unit__label { font-size: .68rem; opacity: .85; margin-top: 4px; }
.tet-card__sub { font-size: .8rem; opacity: .9; position: relative; z-index: 1; }

@media (max-width: 480px) {
  .top-app-bar #langSegmented { display: none; }
}

@media (max-width: 420px) {
  .top-app-bar__subtitle { display: none; }
  .top-app-bar { gap: 6px; padding: 0 8px; }
  .top-app-bar__logo { width: 34px; height: 34px; }
  .segmented__btn { padding: 0 10px; }
  .tet-card__row { grid-template-columns: repeat(2, 1fr); }
}

/* Today summary card */
.today-card { display: flex; flex-direction: column; gap: 16px; }
.today-card__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.today-card__solar { font-weight: 700; }
.today-card__lunar-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--tertiary-container); color: var(--on-tertiary-container);
  border-radius: var(--shape-full); padding: 8px 16px;
}
.info-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px,1fr));
  gap: 10px;
}
.info-pill {
  background: var(--surface-container);
  border-radius: var(--shape-md);
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 2px;
}
.info-pill__label { font-size: .68rem; color: var(--on-surface-variant); text-transform: uppercase; letter-spacing: .5px; }
.info-pill__value { font-weight: 700; font-size: .95rem; }

.clock-display {
  font-size: .9rem; font-weight: 700; font-variant-numeric: tabular-nums;
  color: var(--on-surface-variant); letter-spacing: .5px;
}

.next-veg-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  background: color-mix(in srgb, var(--success-container) 50%, transparent);
  border-radius: var(--shape-sm);
  color: var(--on-success-container);
}

.veg-banner {
  display: flex; align-items: center; gap: 10px;
  background: var(--success-container); color: var(--on-success-container);
  border-radius: var(--shape-md); padding: 12px 16px;
}

/* =========================== Calendar grid =========================== */
.cal-card { display: flex; flex-direction: column; gap: 14px; }
.cal-nav { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.cal-nav__title { display: flex; align-items: center; gap: 6px; cursor: pointer; border-radius: var(--shape-sm); padding: 6px 10px; border: none; background: transparent; }
.cal-nav__title:hover { background: color-mix(in srgb, var(--on-surface) 6%, transparent); }
.cal-nav__actions { display: flex; align-items: center; gap: 4px; }

.weekday-row { display: grid; grid-template-columns: repeat(7,1fr); gap: 6px; padding: 0 2px; }
.weekday-row span { text-align: center; font-size: .68rem; font-weight: 700; color: var(--on-surface-variant); text-transform: uppercase; }

.cal-grid { display: grid; grid-template-columns: repeat(7,1fr); gap: 6px; }
.cal-cell {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--shape-md);
  border: none; background: var(--surface-container-low);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer; color: var(--on-surface);
  padding: 2px;
  transition: background var(--motion-fast) var(--ease-standard);
}
.cal-cell:hover { background: var(--surface-container-high); }
.cal-cell .solar-num { font-size: .95rem; font-weight: 700; line-height: 1; }
.cal-cell .lunar-num { font-size: .6rem; color: var(--on-surface-variant); margin-top: 2px; line-height: 1; }
.cal-cell.is-outside { opacity: .35; }
.cal-cell.is-weekend .solar-num { color: var(--primary); }
.cal-cell.is-today { background: var(--primary); color: var(--on-primary); }
.cal-cell.is-today .lunar-num { color: color-mix(in srgb, var(--on-primary) 75%, transparent); }
.cal-cell.is-selected:not(.is-today) { outline: 2px solid var(--primary); outline-offset: -2px; background: var(--surface-container-high); }
.cal-cell .veg-dot {
  position: absolute; bottom: 4px; width: 5px; height: 5px; border-radius: 50%;
  background: var(--success);
}
.cal-cell.is-today .veg-dot { background: var(--on-primary); }

.cal-legend { display: flex; gap: 16px; flex-wrap: wrap; padding-top: 4px; }
.cal-legend__item { display: flex; align-items: center; gap: 6px; font-size: .72rem; color: var(--on-surface-variant); }
.cal-legend__swatch { width: 10px; height: 10px; border-radius: 50%; }

/* =========================== Day detail panel =========================== */
.detail-card { display: flex; flex-direction: column; gap: 18px; }
.detail-card__header { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.canchi-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr)); gap: 10px; }
.canchi-pill { background: var(--surface-container); border-radius: var(--shape-md); padding: 12px 14px; }
.canchi-pill__label { font-size: .68rem; color: var(--on-surface-variant); text-transform: uppercase; letter-spacing: .5px; }
.canchi-pill__value { font-weight: 700; font-size: 1.05rem; margin-top: 2px; }
.canchi-pill__zodiac { font-size: .72rem; color: var(--on-surface-variant); margin-top: 2px; }

.hours-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
@media (min-width: 480px) and (max-width: 599px) { .hours-grid { grid-template-columns: repeat(4,1fr); } }
.hour-chip {
  border-radius: var(--shape-sm); padding: 8px 6px; text-align: center;
  background: var(--surface-container);
  border: 1px solid transparent;
}
.hour-chip.is-good { background: var(--success-container); color: var(--on-success-container); }
.hour-chip.is-picked { background: var(--primary-container); color: var(--on-primary-container); }
.hour-chip__name { font-weight: 700; font-size: .8rem; }
.hour-chip__range { font-size: .62rem; color: inherit; opacity: .75; }

/* =========================== Dialog / bottom sheet =========================== */
.scrim {
  position: fixed; inset: 0; background: var(--scrim); opacity: 0;
  z-index: 90; pointer-events: none; transition: opacity var(--motion-standard) var(--ease-standard);
}
.scrim.is-open { opacity: .4; pointer-events: auto; }

.dialog {
  position: fixed; z-index: 95;
  left: 50%; top: 50%;
  width: min(92vw, 460px);
  max-height: 86vh;
  background: var(--surface-container-high);
  border-radius: var(--shape-xl);
  box-shadow: var(--elev-3);
  display: flex; flex-direction: column;
  transform: translate(-50%,-46%) scale(.94);
  opacity: 0; pointer-events: none;
  transition: transform var(--motion-standard) var(--ease-emphasized), opacity var(--motion-standard) var(--ease-standard);
}
.dialog.is-open { transform: translate(-50%,-50%) scale(1); opacity: 1; pointer-events: auto; }
.dialog__header { display: flex; align-items: center; justify-content: space-between; padding: 20px 20px 8px; }
.dialog__body { padding: 4px 20px 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 22px; }
.dialog__footer { padding: 0 20px 20px; }

.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.setting-row__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.setting-group { display: flex; flex-direction: column; gap: 10px; }

@media (max-width: 599px) {
  .dialog {
    left: 0; right: 0; top: auto; bottom: 0; width: 100%;
    max-height: 88vh;
    border-radius: var(--shape-xl) var(--shape-xl) 0 0;
    transform: translateY(100%);
  }
  .dialog.is-open { transform: translateY(0); }
}

/* =========================== Snackbar =========================== */
.snackbar-host {
  position: fixed; left: 0; right: 0; bottom: 18px; z-index: 80;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 0 16px; pointer-events: none;
}
.snackbar {
  pointer-events: auto;
  max-width: 520px; width: 100%;
  display: flex; align-items: center; gap: 16px;
  background: var(--inverse-surface); color: var(--inverse-on-surface);
  border-radius: var(--shape-sm);
  padding: 12px 12px 12px 18px;
  box-shadow: var(--elev-3);
  transform: translateY(120%); opacity: 0;
  transition: transform var(--motion-standard) var(--ease-emphasized), opacity var(--motion-standard);
}
.snackbar.is-open { transform: translateY(0); opacity: 1; }
.snackbar__text { flex: 1 1 auto; font-size: .875rem; }
.snackbar__actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.snackbar .btn-text { color: var(--inverse-primary); padding: 0 10px; height: 32px; }

/* =========================== Skeleton (shimmer) =========================== */
.skeleton {
  position: relative; overflow: hidden;
  background: var(--surface-container-high);
  border-radius: var(--shape-sm);
}
.skeleton::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 30%, color-mix(in srgb, var(--on-surface) 8%, transparent) 50%, transparent 70%);
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer { from { transform: translateX(-100%); } to { transform: translateX(100%); } }

.skel-line { height: 14px; border-radius: 6px; }
.skel-block { width: 100%; height: 100%; }

/* full screen splash */
.splash {
  position: fixed; inset: 0; z-index: 200;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 18px;
  background: var(--surface-dim);
  transition: opacity var(--motion-slow) var(--ease-standard), visibility var(--motion-slow);
}
.splash.is-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.splash__logo {
  width: 84px; height: 84px; border-radius: var(--shape-xl);
  background: linear-gradient(155deg, var(--primary), color-mix(in srgb, var(--primary) 60%, #5a0c02));
  display: flex; align-items: center; justify-content: center; color: var(--on-primary);
  box-shadow: var(--elev-3);
}
.splash__logo .icon { width: 46px; height: 46px; }

.spinner {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 3.5px solid var(--secondary-container);
  border-top-color: var(--primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* =========================== Badge / chip =========================== */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: .68rem; font-weight: 700;
  padding: 3px 10px; border-radius: var(--shape-full);
  background: var(--secondary-container); color: var(--on-secondary-container);
}

/* =========================== Footer =========================== */
.app-footer {
  text-align: center; padding: 28px 16px 36px;
  color: var(--on-surface-variant); font-size: .78rem;
  display: flex; flex-direction: column; gap: 6px; align-items: center;
}
.app-footer strong { color: var(--on-surface); }
.app-footer__links { display: flex; gap: 14px; margin-top: 4px; }
.app-footer__links a, .app-footer__links button { color: var(--primary); font-weight: 600; background: none; border: none; cursor: pointer; font-size: inherit; font-family: inherit; padding: 0; }
.app-footer__links a:hover, .app-footer__links button:hover { text-decoration: underline; }

/* =========================== Layout: responsive =========================== */
.layout-grid { display: grid; gap: 20px; grid-template-columns: 1fr; }

@media (min-width: 900px) {
  .layout-grid { grid-template-columns: 1.25fr .9fr; align-items: start; }
  .detail-card { position: sticky; top: 84px; }
}

@media (min-width: 600px) {
  .main-content { padding: 28px 24px 56px; }
  .tet-unit__num { font-size: 2.1rem; }
}

@media (min-width: 1240px) {
  .main-content { max-width: 1180px; padding-top: 36px; }
}

/* Scrollbar */
* { scrollbar-width: thin; scrollbar-color: var(--outline-variant) transparent; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--outline-variant); border-radius: 8px; }

/* utility */
.flex-row { display: flex; align-items: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.mt-4 { margin-top: 4px; }
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap;
}