:root {
  color-scheme: light dark;
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont,
    sans-serif;
  --bg: #f4f5f7;
  --fg: #1e293b;
  --muted: #475569;
  --primary: #0f766e;
  --primary-soft: rgba(15, 118, 110, 0.1);
  --accent: #f97316;
  --accent-soft: rgba(249, 115, 22, 0.14);
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.1);
  --success: #16a34a;
  --success-soft: rgba(22, 163, 74, 0.14);
  --surface: #ffffff;
  --surface-alt: #e2e8f0;
  --border: rgba(15, 23, 42, 0.1);
  --shadow: 0 12px 24px -16px rgba(15, 23, 42, 0.45);
  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%23475569' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M2 2l4 4 4-4'/%3E%3C/svg%3E");
}

[data-theme="dark"] {
  --bg: #0f172a;
  --fg: #e2e8f0;
  --muted: #94a3b8;
  --primary: #14b8a6;
  --primary-soft: rgba(20, 184, 166, 0.12);
  --accent: #fb923c;
  --accent-soft: rgba(251, 146, 60, 0.14);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.12);
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.18);
  --surface: #1e293b;
  --surface-alt: #1e293b;
  --border: rgba(148, 163, 184, 0.2);
  --shadow: 0 12px 32px -18px rgba(15, 23, 42, 0.85);
  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M2 2l4 4 4-4'/%3E%3C/svg%3E");
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease, color 0.3s ease;
}

body.drawer-open {
  overflow: hidden;
}

header {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1rem, 3vw, 2.5rem) 0.5rem;
}

header h1 {
  flex: 1 1 auto;
  font-size: clamp(1.25rem, 2.2vw, 2.1rem);
  margin: 0;
  letter-spacing: 0.02em;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-title {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}

.app-title span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-title__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.6rem;
  flex-shrink: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.timezone-select-compact {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  position: relative;
}

.timezone-select-compact select {
  padding: 0.55rem 2rem 0.55rem 0.75rem;
  font-size: 0.9rem;
  min-width: 0;
  max-width: 200px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .timezone-select-compact select {
    max-width: 150px;
    font-size: 0.85rem;
    padding: 0.5rem 1.75rem 0.5rem 0.65rem;
  }
}

@media (max-width: 480px) {
  header {
    gap: 0.4rem;
  }

  header h1 {
    font-size: 1rem;
  }

  .app-title {
    gap: 0.4rem;
  }

  .app-title__icon {
    width: 1.8rem;
    height: 1.8rem;
  }

  .header-actions {
    gap: 0.4rem;
  }

  .timezone-select-compact select {
    max-width: 100px;
    font-size: 0.75rem;
    padding: 0.45rem 1.5rem 0.45rem 0.55rem;
  }

  button#themeToggle {
    padding: 0.45rem 0.65rem;
    font-size: 1rem;
  }
}

input,
button,
select {
  font: inherit;
  padding: 0.55rem 0.75rem;
  border-radius: 0.7rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: inherit;
  transition: border 0.2s ease, transform 0.2s ease, background 0.3s ease;
}

/* Use a custom chevron so dropdowns look consistent across browsers */
select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 2.25rem;
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 0.7rem auto;
  cursor: pointer;
}

select::-ms-expand {
  display: none;
}

input:focus,
select:focus,
button:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button {
  cursor: pointer;
  border: none;
  font-weight: 600;
}

.icon-button {
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 999px;
  width: 2.2rem;
  height: 2.2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

button.primary {
  background: var(--primary);
  color: #f8fafc;
  box-shadow: 0 10px 20px -12px rgba(20, 184, 166, 0.6);
}

button.outline {
  border: 1px solid var(--border);
  background: transparent;
}

main {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr);
  gap: clamp(1rem, 2vw, 2rem);
  padding: 0 clamp(1rem, 3vw, 2.5rem) 2.5rem;
}

@media (max-width: 1100px) {
  main {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--surface);
  border-radius: 1.2rem;
  padding: clamp(1rem, 3vw, 1.75rem);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  height: fit-content;
}

#calendar-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  margin-bottom: 1.25rem;
  gap: 0.75rem;
}

.calendar-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.calendar-nav label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: nowrap;
}

.calendar-nav select {
  min-width: 7rem;
}

.calendar-nav button.nav-btn {
  padding-inline: 0.65rem;
  font-size: 1.1rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
}

.calendar-nav button.small {
  padding-inline: 0.85rem;
  font-size: 0.9rem;
}

/* Removed old timezone-control styles - now in header */

.weekday-grid,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.35rem;
}

.weekday-grid div {
  font-size: 0.8rem;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

.day {
  position: relative;
  padding: 0.6rem 0.5rem;
  border-radius: 0.45rem;
  border: 1px solid transparent;
  min-height: 4.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.4rem;
  cursor: pointer;
  background: linear-gradient(
    180deg,
    rgba(148, 163, 184, 0.05),
    transparent 55%
  );
  transition: transform 0.18s ease, border 0.2s ease, box-shadow 0.2s ease;
}

.day:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -22px rgba(15, 23, 42, 0.9);
}

.day .solar {
  font-size: 1.15rem;
  font-weight: 600;
}

.day .lunar {
  font-size: 0.7rem;
  color: var(--muted);
}

.day.lunar-special .lunar {
  color: var(--accent);
  font-weight: 700;
}

.day.today {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-soft);
}

.day.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.day.other-month .solar {
  color: var(--muted);
  opacity: 0.6;
}

.badge {
  align-self: center;
  font-size: 0.68rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.badge.vegetarian {
  background: var(--success-soft);
  color: var(--success);
}

/* Show badges as dots on mobile */
@media (max-width: 767px) {
  .badge {
    position: absolute;
    top: 0.2rem;
    right: 0.2rem;
    width: 0.4rem;
    height: 0.4rem;
    padding: 0;
    font-size: 0;
    overflow: hidden;
    background: var(--primary);
    align-self: unset;
  }

  .badge.trung {
    background: var(--accent);
  }

  .badge.leap {
    background: var(--danger);
  }

  .badge.vegetarian {
    background: var(--success);
  }
}

/* Show full badges on larger screens */
@media (min-width: 768px) {
  .badge.trung {
    background: var(--accent-soft);
    color: var(--accent);
  }

  .badge.leap {
    background: var(--danger-soft);
    color: var(--danger);
  }

  .badge.vegetarian {
    background: var(--success-soft);
    color: var(--success);
  }
}

.panel-section {
  display: grid;
  gap: 1.25rem;
}

.section-title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.detail-grid {
  display: grid;
  gap: 0.45rem;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.detail-item {
  background: var(--surface-alt);
  padding: 0.55rem 0.75rem;
  border-radius: 0.7rem;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.detail-item .label {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.detail-item strong {
  font-size: 0.9rem;
}

.countdown-display {
  background: var(--primary-soft);
  color: var(--primary);
  padding: 0.75rem 0.5rem;
  border-radius: 0.7rem;
  border: 1px solid var(--border);
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.25rem;
}

.section-header button {
  font-size: 0.8rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
}

.section-header button:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.hours-list {
  display: grid;
  gap: 0.5rem;
}

.hours-list.collapsed {
  display: none;
}

.hour-item {
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  padding: 0.6rem 0.85rem;
  display: grid;
  align-items: center;
  gap: 0.4rem;
  background: rgba(148, 163, 184, 0.04);
  grid-template-columns: 1fr auto;
}

.hour-item.good {
  border-color: rgba(20, 184, 166, 0.35);
  background: rgba(20, 184, 166, 0.12);
}

.hour-item span {
  font-size: 0.85rem;
}

.convert-forms {
  display: grid;
  gap: 0.75rem;
}

.converter-fields {
  display: flex;
  gap: 0.75rem;
  flex-direction: row;
}

.converter-field {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
  flex: 1;
}

.converter-field .field-label {
  font-size: 0.85rem;
  color: var(--muted);
}

.converter-field input {
  width: 100%;
  font-size: 0.9rem;
}

.convert-hint {
  font-size: 0.75rem;
  color: var(--muted);
}

.convert-message {
  font-size: 0.85rem;
  padding: 0.65rem 0.75rem;
  border-radius: 0.75rem;
  background: rgba(20, 184, 166, 0.12);
  border: 1px solid rgba(20, 184, 166, 0.35);
  color: var(--primary);
}

.convert-message.error {
  background: var(--danger-soft);
  border-color: rgba(220, 38, 38, 0.35);
  color: var(--danger);
}

.timezone-display {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.timezone-display strong {
  color: var(--fg);
}

footer {
  padding: 1rem clamp(1rem, 3vw, 2.5rem) 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

a {
  color: var(--primary);
}

.config-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  backdrop-filter: blur(2px);
  z-index: 900;
}

.config-drawer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  max-height: min(82vh, 700px);
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -18px 38px -30px rgba(15, 23, 42, 0.85);
  transform: translateY(100%);
  transition: transform 0.28s ease, opacity 0.28s ease, visibility 0.28s ease;
  z-index: 901;
  display: flex;
  flex-direction: column;
  padding: 1.25rem clamp(1.1rem, 4vw, 2rem) 1.75rem;
  gap: 1rem;
  visibility: hidden;
  opacity: 0;
  border-radius: 1.25rem 1.25rem 0 0;
  overflow-y: auto;
}

.config-drawer.open {
  transform: translateY(0);
  visibility: visible;
  opacity: 1;
}

.config-drawer[aria-hidden="true"] {
  pointer-events: none;
}

.config-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.config-header h2 {
  margin: 0;
  font-size: 1.3rem;
}

.config-content {
  overflow-y: auto;
  padding-right: 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.config-section {
  display: grid;
  gap: 1rem;
}

.config-section h3 {
  margin: 0;
  font-size: 1.05rem;
}

.config-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
}

.config-option input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
}

.config-option span {
  flex: 1;
}

.config-suboption {
  display: grid;
  gap: 0.5rem;
  padding-left: 1.9rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.config-suboption select {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 0.55rem 0.75rem;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.config-suboption.is-disabled {
  opacity: 0.5;
}

.config-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.config-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.config-grid input,
.config-grid select {
  padding: 0.55rem 0.75rem;
  font-size: 0.95rem;
}

.config-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.config-hint.error {
  color: var(--danger);
}

.config-hint.success {
  color: var(--success);
}

@media (min-width: 681px) {
  .config-overlay {
    /* display: block; */
  }

  .config-drawer {
    top: 30%;
    left: 50%;
    right: auto;
    bottom: auto;
    width: min(480px, 88vw);
    max-height: min(80vh, 700px);
    border: 1px solid var(--border);
    border-radius: 1.1rem;
    box-shadow: 0 30px 60px -45px rgba(15, 23, 42, 0.75);
    transform: translate(-50%, -50%) scale(0.92);
    padding: 1.75rem 2rem 2rem;
  }

  .config-drawer.open {
    transform: translate(-50%, -50%) scale(1);
  }
}

@media (max-width: 680px) {
  header {
    padding: 1rem 1rem 0.5rem;
    gap: 0.5rem;
    flex-wrap: nowrap;
  }

  header h1 {
    font-size: 1.1rem;
  }

  .app-title {
    gap: 0.5rem;
  }

  .app-title__icon {
    width: 2rem;
    height: 2rem;
  }

  .header-actions {
    gap: 0.5rem;
  }

  main {
    padding: 0 1rem 2rem;
  }

  .card {
    padding: 1rem;
  }

  #calendar-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.9rem;
  }

  .calendar-nav {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr) auto;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
  }

  .calendar-nav label {
    flex: initial;
    width: 100%;
    font-size: 0.9rem;
  }

  .calendar-nav select {
    width: 100%;
    min-width: 0;
    font-size: 0.95rem;
    padding: 0.5rem 0.6rem;
  }

  #todayButton {
    grid-column: 1 / -1;
    font-size: 0.95rem;
    padding: 0.55rem 0.65rem;
  }

  .calendar-nav button.nav-btn,
  .calendar-nav button.small {
    flex: initial;
    font-size: 0.95rem;
    padding: 0.5rem 0.6rem;
  }

  .weekday-grid,
  .calendar-grid {
    gap: 0.25rem;
  }

  .day {
    min-height: 3.5rem;
    padding: 0.5rem 0.4rem;
  }

  .day .solar {
    font-size: 1.05rem;
  }

  .convert-forms {
    gap: 0.65rem;
  }

  .converter-fields {
    grid-template-columns: 1fr;
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
}