* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, sans-serif;
  color: #d8e3f0;
  background:
    radial-gradient(
      circle at top left,
      rgba(90, 123, 255, 0.35),
      transparent 30%
    ),
    radial-gradient(
      circle at bottom right,
      rgba(0, 209, 161, 0.22),
      transparent 28%
    ),
    linear-gradient(135deg, #0f172a 0%, #111827 45%, #0b1220 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent 90%);
}

.app-shell {
  width: min(1100px, calc(100% - 28px));
  margin: 0 auto;
  padding: 28px 0 42px;
  display: grid;
  gap: 18px;
}

.planner-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
  align-items: start;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.78rem;
  color: #8dd0ff;
}

h1,
h2,
h3,
p,
label {
  margin-top: 0;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1;
  color: #f8fbff;
}

.top-bar {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(8, 14, 26, 0.75);
  backdrop-filter: blur(16px);
  border-radius: 22px;
  box-shadow: 0 24px 72px rgba(0, 0, 0, 0.3);
  padding: 24px;
  display: grid;
  gap: 18px;
}

.auth-panel {
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  padding: 16px;
  display: grid;
  gap: 14px;
}

.auth-panel__head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
}

.auth-panel__kicker {
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.74rem;
  color: #8dd0ff;
}

.auth-panel h2,
.auth-card h3 {
  margin: 0;
  color: #f8fbff;
}

.auth-session-chip {
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.78rem;
  color: #cfe7ff;
  background: rgba(69, 113, 255, 0.16);
  border: 1px solid rgba(120, 169, 255, 0.32);
  white-space: nowrap;
}

.auth-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.auth-card {
  display: grid;
  gap: 10px;
  padding: 14px;
  border-radius: 16px;
  background: rgba(8, 14, 26, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.auth-card label {
  color: #9fb0c9;
  font-size: 0.88rem;
}

.auth-card input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #f3f7ff;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 0.96rem;
  outline: none;
}

.auth-card input:focus {
  border-color: rgba(120, 169, 255, 0.6);
  box-shadow: 0 0 0 4px rgba(69, 113, 255, 0.2);
}

.auth-actions {
  display: flex;
  justify-content: flex-end;
}

.auth-status {
  margin: 0;
  min-height: 20px;
  color: #91a6c6;
  font-size: 0.88rem;
}

.auth-status--error {
  color: #ffd1dc;
}

.composer {
  display: grid;
  grid-template-columns: 1fr 180px 180px auto;
  gap: 12px;
}

#addDescription,
#addTag,
#addDueDate,
#detailDescription,
#detailTag,
#detailDueDate {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #f3f7ff;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 1rem;
  outline: none;
}

#addDescription::placeholder {
  color: #7f8ca8;
}

#addDescription:focus,
#addTag:focus,
#addDueDate:focus,
#detailDescription:focus,
#detailTag:focus,
#detailDueDate:focus {
  border-color: rgba(120, 169, 255, 0.6);
  box-shadow: 0 0 0 4px rgba(69, 113, 255, 0.2);
}

#addTag,
#addDueDate,
#detailTag,
#detailDueDate {
  cursor: pointer;
}

#addTag option,
#detailTag option {
  color: #0b1220;
  background: #eaf0ff;
}

.primary-btn,
.ghost-btn,
.nav-btn,
.icon-btn,
.calendar-task {
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease;
}

.primary-btn {
  padding: 12px 16px;
  background: linear-gradient(135deg, #5d7cff, #45d7c2);
  color: #07111f;
  font-weight: 700;
  box-shadow: 0 14px 30px rgba(68, 117, 255, 0.28);
}

.ghost-btn {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.06);
  color: #c9d4e8;
}

.nav-btn,
.icon-btn {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.08);
  color: #d8e3f0;
}

.primary-btn:hover,
.ghost-btn:hover,
.nav-btn:hover,
.icon-btn:hover,
.calendar-task:hover {
  transform: translateY(-1px);
}

.calendar-card {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(8, 14, 26, 0.75);
  backdrop-filter: blur(16px);
  border-radius: 22px;
  box-shadow: 0 24px 72px rgba(0, 0, 0, 0.3);
  padding: 18px;
}

.summary-rail {
  display: grid;
  gap: 16px;
  position: sticky;
  top: 18px;
}

.summary-card {
  width: 100%;
  text-align: left;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  background: rgba(8, 14, 26, 0.75);
  backdrop-filter: blur(16px);
  box-shadow: 0 24px 72px rgba(0, 0, 0, 0.24);
}

.summary-card__head {
  margin-bottom: 12px;
}

.summary-card__head h3 {
  margin: 0;
  color: #f8fbff;
}

.summary-card__kicker {
  margin: 0 0 6px;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: #8dd0ff;
}

.summary-card--upcoming {
  border-color: rgba(95, 215, 198, 0.24);
}

.summary-card--overdue {
  border-color: rgba(255, 113, 132, 0.24);
}

.summary-preview-list {
  display: grid;
  gap: 10px;
  max-height: 286px;
  overflow-y: auto;
  padding-right: 4px;
}

.summary-preview-item {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.summary-preview-item__title {
  color: #eef4ff;
  font-size: 0.92rem;
}

.summary-preview-item__meta {
  color: #91a6c6;
  font-size: 0.78rem;
}

.summary-empty {
  margin: 0;
  color: #91a6c6;
  font-size: 0.88rem;
}

.calendar-tags {
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  margin-bottom: 14px;
}

.calendar-tags-header {
  margin-bottom: 8px;
}

.calendar-tags-header h3 {
  margin: 0;
  color: #f8fbff;
}

.tag-plus-btn {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1;
}

.tag-label-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.tag-pill {
  border: 1px solid rgba(135, 160, 255, 0.32);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.78rem;
  color: #eaf0ff;
  background: rgba(73, 108, 255, 0.26);
}

button.tag-pill {
  cursor: pointer;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease;
}

button.tag-pill:hover {
  transform: translateY(-1px);
}

.tag-label-empty {
  font-size: 0.8rem;
  color: #97accd;
}

.tag-helper {
  margin: 0;
  color: #97accd;
  font-size: 0.8rem;
}

#tagEditName,
#newTagDrawerName {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #f3f7ff;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 0.95rem;
  outline: none;
}

#tagEditName:focus,
#newTagDrawerName:focus {
  border-color: rgba(120, 169, 255, 0.6);
  box-shadow: 0 0 0 4px rgba(69, 113, 255, 0.2);
}

.calendar-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 12px;
}

#monthLabel {
  margin: 0;
  min-width: 240px;
  text-align: center;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: #f8fbff;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
}

.weekday-head {
  text-align: center;
  padding: 6px;
  font-size: 0.82rem;
  color: #93a6c5;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.day-cell {
  min-height: 112px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.day-cell--clickable {
  cursor: pointer;
}

.day-cell--muted {
  opacity: 0.4;
}

.day-cell--today {
  border-color: rgba(108, 196, 255, 0.65);
  box-shadow: inset 0 0 0 1px rgba(108, 196, 255, 0.4);
}

.day-number {
  font-size: 0.86rem;
  color: #b9c9e4;
}

.calendar-task {
  display: grid;
  gap: 4px;
  text-align: left;
  background: rgba(73, 108, 255, 0.26);
  color: #eaf0ff;
  padding: 6px 8px;
  font-size: 0.8rem;
  line-height: 1.25;
  border: 1px solid rgba(135, 160, 255, 0.32);
}

.calendar-task--done {
  text-decoration: line-through;
  opacity: 0.7;
}

.calendar-task-tag {
  justify-self: start;
  font-size: 0.7rem;
  border-radius: 999px;
  padding: 2px 8px;
  background: rgba(8, 14, 26, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.calendar-task-text {
  display: block;
}

.task-more {
  font-size: 0.72rem;
  color: #97accd;
}

.api-status {
  margin: 12px 0 0;
  min-height: 22px;
  color: #9db1cd;
}

.api-status--error {
  color: #ffd1dc;
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 20, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.drawer-backdrop--open {
  opacity: 1;
  pointer-events: auto;
}

.list-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(400px, 92vw);
  height: 100vh;
  background: rgba(8, 14, 26, 0.94);
  border-left: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
  transform: translateX(100%);
  transition: transform 0.24s ease;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 6;
}

.list-drawer--open {
  transform: translateX(0);
}

.drawer-kicker {
  margin: 0 0 6px;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: #8dd0ff;
}

.drawer-meta {
  margin: 0;
  color: #91a6c6;
  font-size: 0.88rem;
}

.list-drawer-items {
  overflow-y: auto;
  display: grid;
  gap: 12px;
  padding-right: 4px;
}

.drawer-add-panel {
  display: none;
  gap: 10px;
  padding: 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.drawer-add-panel--open {
  display: grid;
}

.drawer-add-panel label {
  color: #9fb0c9;
  font-size: 0.88rem;
}

#addDueDate {
  display: none;
}

.list-drawer-empty {
  margin: 0;
  color: #91a6c6;
}

.list-task-item {
  text-align: left;
  width: 100%;
  display: grid;
  gap: 8px;
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #eef4ff;
}

.list-task-item__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.list-task-status {
  font-size: 0.74rem;
  color: #91a6c6;
}

.list-task-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.list-task-delete-btn {
  border: 1px solid rgba(255, 141, 162, 0.55);
  border-radius: 8px;
  background: rgba(255, 111, 145, 0.12);
  color: #ffd3dd;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  line-height: 1;
}

.list-task-delete-btn:hover {
  background: rgba(255, 111, 145, 0.22);
}

.list-task-description {
  margin: 0;
  line-height: 1.4;
}

.list-task-date {
  margin: 0;
  font-size: 0.875rem;
  color: #a5c9ea;
}

/* Welcome Page */
.welcome-shell {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
}

.welcome-card {
  width: 100%;
  max-width: 480px;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(135, 160, 255, 0.25);
  border-radius: 16px;
  padding: 48px 32px;
  text-align: center;
}

.welcome-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.welcome-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0;
  background: linear-gradient(135deg, #496cff, #00d1a1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-subtitle {
  font-size: 1.125rem;
  color: #a5c9ea;
  margin: 0;
}

.welcome-body {
  font-size: 0.95rem;
  color: #8792ae;
  line-height: 1.6;
}

.welcome-btn {
  padding: 12px 24px;
  font-size: 1rem;
  align-self: center;
  width: 100%;
  max-width: 200px;
}

.welcome-footer {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid rgba(135, 160, 255, 0.15);
  font-size: 0.875rem;
}

.author-info {
  margin: 0;
  color: #8792ae;
}

.github-link {
  color: #496cff;
  text-decoration: none;
  transition: color 0.2s;
}

.github-link:hover {
  color: #6b7dff;
}

/* Auth Pages */
.auth-shell {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
}

.auth-container {
  width: 100%;
  max-width: 420px;
}

.auth-card {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(135, 160, 255, 0.25);
  border-radius: 16px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.auth-header {
  text-align: center;
  margin: 0;
}

.auth-header h1 {
  margin: 0 0 8px;
  font-size: 1.875rem;
  background: linear-gradient(135deg, #496cff, #00d1a1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: #a5c9ea;
  font-weight: 600;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.auth-form label {
  font-size: 0.875rem;
  color: #a5c9ea;
  font-weight: 500;
}

.auth-form input {
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(135, 160, 255, 0.3);
  border-radius: 8px;
  color: #d8e3f0;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.auth-form input:focus {
  outline: none;
  border-color: rgba(73, 108, 255, 0.6);
  background: rgba(255, 255, 255, 0.12);
}

.auth-form input::placeholder {
  color: #647a96;
}

.auth-status {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.875rem;
  text-align: center;
  background: rgba(76, 175, 80, 0.15);
  color: #81c784;
}

.auth-status--error {
  background: rgba(244, 67, 54, 0.15);
  color: #ef5350;
}

.auth-footer {
  text-align: center;
  font-size: 0.875rem;
  color: #8792ae;
}

.auth-footer p {
  margin: 0 0 6px;
}

.auth-link {
  color: #496cff;
  text-decoration: none;
  transition: color 0.2s;
}

.auth-link:hover {
  color: #6b7dff;
}

/* Top bar adjustments */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
  font-size: 0.8rem;
  color: #91a6c6;
}

.list-task-item:hover,
.summary-card:hover {
  transform: translateY(-1px);
}

.detail-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(400px, 92vw);
  height: 100vh;
  background: rgba(8, 14, 26, 0.94);
  border-left: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
  transform: translateX(100%);
  transition: transform 0.24s ease;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 8;
}

.detail-drawer--open {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-header h3 {
  margin: 0;
  color: #f5f8ff;
}

.drawer-form {
  display: grid;
  gap: 10px;
}

.drawer-form label {
  color: #9fb0c9;
  font-size: 0.88rem;
}

#detailDescription {
  resize: vertical;
  min-height: 110px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check-row input {
  width: 18px;
  height: 18px;
  accent-color: #5fd7c6;
}

.drawer-actions {
  margin-top: auto;
  display: flex;
  gap: 10px;
}

@media (max-width: 700px) {
  .composer {
    grid-template-columns: 1fr;
  }

  .planner-layout {
    grid-template-columns: 1fr;
  }

  .auth-grid {
    grid-template-columns: 1fr;
  }

  .auth-panel__head {
    flex-direction: column;
  }

  .summary-rail {
    position: static;
  }

  .calendar-grid {
    gap: 6px;
  }

  .day-cell {
    min-height: 90px;
  }

  #monthLabel {
    min-width: 180px;
  }

  .detail-drawer,
  .list-drawer {
    width: min(100vw, 400px);
  }
}