/* ============================================
   MODERNIST CALENDAR
   ============================================ */

:root {
  /* Modernist palette */
  --mod-hue: 48;
  --mod-saturation: 100%;
  --mod-lightness: 58%;
  --mod-lightness-hover: 48%;
  --mod-yellow: hsl(var(--mod-hue), var(--mod-saturation), var(--mod-lightness));
  --mod-yellow-light: hsl(var(--mod-hue), var(--mod-saturation), 72%);
  --mod-yellow-pale: hsl(var(--mod-hue), var(--mod-saturation), 96%);
  --mod-yellow-hover: hsl(var(--mod-hue), var(--mod-saturation), var(--mod-lightness-hover));
  --mod-black: #1A1A1A;
  --mod-dark: #2C2C2C;
  --mod-gray: #6B6B6B;
  --mod-gray-light: #A0A0A0;
  --mod-silver: #E8E8E8;
  --mod-white: #FAFAFA;
  --mod-bg: #F2F0EB;
  --mod-red: #C0392B;

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.3s;
  --duration-fast: 0.15s;
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Remove default focus outline */
*:focus {
  outline: none;
}

body {
  font-family: var(--font);
  background: var(--mod-black);
  color: var(--mod-black);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

/* ── App Container ── */
.app {
  width: 100%;
  max-width: 420px;
  background: var(--mod-yellow);
  border-radius: 28px;
  overflow: hidden;
  box-shadow:
    0 2px 4px rgba(0,0,0,0.08),
    0 12px 40px rgba(0,0,0,0.3),
    inset 0 1px 0 rgba(255,255,255,0.15);
  position: relative;
}

/* ── Top Bar ── */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--mod-black);
}

.brand-dot {
  width: 5px;
  height: 5px;
  background: var(--mod-black);
  border-radius: 50%;
}

.clock {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--mod-dark-adaptive, var(--mod-dark));
  font-variant-numeric: tabular-nums;
}

/* ── Theme Picker ── */
.theme-picker {
  position: relative;
}

.theme-toggle {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--mod-black);
  background: transparent;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.theme-toggle:hover {
  background: rgba(0, 0, 0, 0.08);
}

.theme-toggle:active {
  transform: scale(0.96);
}

.theme-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--mod-white);
  border-radius: var(--radius-sm);
  padding: 4px;
  list-style: none;
  min-width: 130px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
  opacity: 0;
  transform: translateY(-4px) scale(0.96);
  pointer-events: none;
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 50;
}

.theme-menu.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

.theme-menu li {
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--mod-black);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}

.theme-menu li:hover {
  background: var(--mod-bg);
}

.theme-menu li.active {
  font-weight: 700;
}

/* ── Month Navigation ── */
.calendar-shell {
  padding: 0 20px;
}

.month-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 16px;
}

.nav-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mod-black);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-btn:hover {
  background: rgba(0, 0, 0, 0.08);
  transform: scale(1.05);
}

.nav-btn:active {
  transform: scale(0.92);
  transition-duration: 0.08s;
}

.nav-btn:focus-visible {
  box-shadow: inset 0 0 0 2px var(--mod-black);
}

.month-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.month-name {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.year-label {
  font-size: 12px;
  font-weight: 400;
  color: var(--mod-gray-adaptive, var(--mod-gray));
  letter-spacing: 1px;
}

/* Month transition */
.month-name.fade-out {
  opacity: 0;
  transform: translateY(-4px);
}

/* ── Today Button ── */
.today-btn {
  display: block;
  margin: 0 auto 16px;
  padding: 6px 18px;
  border: 1.5px solid var(--mod-black);
  background: transparent;
  border-radius: 20px;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--mod-black);
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
}

.today-btn.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.today-btn:hover {
  background: var(--mod-black);
  color: var(--mod-yellow);
}

.today-btn:active {
  transform: scale(0.95);
}

/* ── Day Headers ── */
.day-headers {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: 0 4px;
  margin-bottom: 8px;
}

.day-headers span {
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--mod-black);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 4px 0;
}

/* ── Calendar Grid ── */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-template-rows: repeat(6, 1fr);
  gap: 4px;
  padding: 0 4px 20px;
  height: 300px;
}

.day-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--mod-black);
  transition: all var(--duration-fast) var(--ease-out);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* Stagger entrance animation */
.day-cell {
  opacity: 0;
  transform: scale(0.8) translateY(6px);
  animation: dayEnter 0.35s var(--ease-spring) forwards;
}

@keyframes dayEnter {
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.day-cell.other-month {
  color: rgba(0, 0, 0, 0.2);
}

.day-cell:not(.other-month):hover {
  background: rgba(0, 0, 0, 0.08);
  transform: scale(1.08);
}

.day-cell:not(.other-month):active {
  transform: scale(0.9);
  transition-duration: 0.08s;
}

/* Today */
.day-cell.today {
  background: var(--mod-black);
  color: var(--mod-yellow);
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.day-cell.today:hover {
  background: var(--mod-dark);
  transform: scale(1.08);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Selected */
.day-cell.selected:not(.today) {
  background: rgba(0, 0, 0, 0.12);
  font-weight: 600;
  box-shadow: inset 0 0 0 2px var(--mod-black);
}

/* Event indicator dot */
.day-cell .event-dot {
  position: absolute;
  bottom: 5px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--mod-black);
  transition: transform var(--duration-fast) var(--ease-spring);
}

.day-cell.today .event-dot {
  background: var(--mod-yellow);
}

.day-cell:hover .event-dot {
  transform: scale(1.4);
}

/* Pulse on today's dot */
.day-cell.today .event-dot {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── Event Panel ── */
.event-panel {
  background: var(--mod-white);
  margin: 0 12px 12px;
  border-radius: var(--radius);
  padding: 20px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    max-height 0.4s var(--ease-out),
    opacity 0.3s var(--ease-out),
    padding 0.4s var(--ease-out);
  padding-top: 0;
  padding-bottom: 0;
}

.event-panel.open {
  max-height: 280px;
  opacity: 1;
  padding: 20px;
  overflow-y: auto;
}

.event-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.selected-date {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.close-panel-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--mod-silver);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mod-gray);
  transition: all var(--duration-fast) var(--ease-out);
}

.close-panel-btn:hover {
  background: var(--mod-gray-light);
  color: var(--mod-black);
  transform: rotate(90deg);
}

.close-panel-btn:active {
  transform: scale(0.9) rotate(90deg);
}

/* Event list */
.event-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.no-events {
  font-size: 13px;
  color: var(--mod-black);
  text-align: center;
  padding: 20px 0;
}

.event-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--mod-bg);
  border-radius: var(--radius-xs);
  transition: all var(--duration-fast) var(--ease-out);
  animation: slideIn 0.3s var(--ease-spring);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-12px);
  }
}

.event-item:hover {
  background: var(--mod-silver);
}

.event-time {
  font-size: 11px;
  font-weight: 600;
  color: var(--mod-gray);
  min-width: 40px;
  font-variant-numeric: tabular-nums;
}

.event-name {
  font-size: 13px;
  font-weight: 500;
  flex: 1;
}

.event-delete {
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mod-gray-light);
  opacity: 0;
  transition: all var(--duration-fast) var(--ease-out);
}

.event-item:hover .event-delete {
  opacity: 1;
}

.event-delete:hover {
  background: var(--mod-red);
  color: white;
}

/* Add event button */
.add-event-btn {
  width: 100%;
  padding: 10px;
  border: 1.5px dashed var(--mod-silver);
  background: transparent;
  border-radius: var(--radius-xs);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  color: var(--mod-gray);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--duration) var(--ease-out);
}

.add-event-btn:hover {
  border-color: var(--mod-black);
  color: var(--mod-black);
  background: rgba(0, 0, 0, 0.02);
}

.add-event-btn:active {
  transform: scale(0.98);
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration) var(--ease-out);
  z-index: 100;
  backdrop-filter: blur(4px);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--mod-white);
  border-radius: var(--radius);
  padding: 28px;
  width: 340px;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.35s var(--ease-spring);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

.modal-date {
  font-size: 12px;
  color: var(--mod-gray);
  margin-bottom: 20px;
}

.event-input,
.time-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--mod-silver);
  border-radius: var(--radius-xs);
  font-family: var(--font);
  font-size: 14px;
  background: var(--mod-bg);
  color: var(--mod-black);
  outline: none;
  transition: all var(--duration-fast) var(--ease-out);
  margin-bottom: 10px;
}

.event-input:focus,
.time-input:focus {
  border-color: var(--mod-yellow);
  background: white;
  box-shadow: 0 0 0 3px rgba(245, 209, 0, 0.2);
}

.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.modal-btn {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: var(--radius-xs);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.modal-btn.cancel {
  background: var(--mod-silver);
  color: var(--mod-gray);
}

.modal-btn.cancel:hover {
  background: var(--mod-gray-light);
  color: var(--mod-black);
}

.modal-btn.confirm {
  background: var(--mod-yellow);
  color: var(--mod-black);
}

.modal-btn.confirm:hover {
  background: var(--mod-yellow-hover);
}

.modal-btn:active {
  transform: scale(0.96);
}

/* ── Ripple Effect ── */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.12);
  transform: scale(0);
  animation: ripple 0.5s var(--ease-out) forwards;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(2.5);
    opacity: 0;
  }
}

/* Hide scrollbar but keep scroll */
.event-panel {
  scrollbar-width: none;
}

.event-panel::-webkit-scrollbar {
  display: none;
}

/* ── Responsive ── */
@media (max-width: 460px) {
  body {
    padding: 0;
    align-items: stretch;
  }

  .app {
    max-width: 100%;
    border-radius: 0;
    min-height: 100vh;
  }

  .event-input,
  .time-input {
    font-size: 16px;
  }
}