:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #1f2937;
  --sub-text: #64748b;
  --border: #dbe3ef;
  --primary: #5b7cfa;
  --primary-hover: #4566ea;
  --danger: #e5484d;
  --danger-hover: #cf3439;
  --shadow: 0 10px 30px rgba(44, 62, 80, 0.1);

  --part-time: #f59e0b;
  --work: #3b82f6;
  --school: #8b5cf6;
  --task: #ef476f;
  --play: #22c55e;
  --club: #ec4899;
  --volunteer: #14b8a6;
  --other: #64748b;
}

body.dark-mode {
  --bg: #111827;
  --surface: #1f2937;
  --surface-soft: #273449;
  --text: #f8fafc;
  --sub-text: #b7c2d2;
  --border: #3d4d63;
  --primary: #839cff;
  --primary-hover: #a5b4fc;
  --danger: #fb7185;
  --danger-hover: #f43f5e;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Hiragino Kaku Gothic ProN",
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    sans-serif;
  transition: background 0.2s, color 0.2s;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.hidden {
  display: none !important;
}

.app-shell {
  min-height: 100vh;
}

.top-header {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, #5b7cfa, #a855f7);
  font-size: 25px;
  box-shadow: 0 8px 18px rgba(91, 124, 250, 0.3);
}

.brand h1 {
  margin: 0;
  font-size: 1.25rem;
}

.brand p {
  margin: 4px 0 0;
  color: var(--sub-text);
  font-size: 0.82rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-button,
.logout-button,
.secondary-button,
.primary-button,
.danger-button,
.quick-category-button,
.nav-button,
.auth-tab {
  border: 0;
  transition: 0.2s;
}

.icon-button {
  min-width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 1.1rem;
}

.icon-button:hover {
  transform: translateY(-1px);
  background: var(--surface-soft);
}

.logout-button,
.secondary-button,
.primary-button,
.danger-button {
  padding: 11px 16px;
  border-radius: 10px;
  font-weight: 700;
}

.primary-button {
  width: 100%;
  color: white;
  background: var(--primary);
}

.primary-button:hover {
  background: var(--primary-hover);
}

.secondary-button,
.logout-button {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
}

.secondary-button:hover,
.logout-button:hover {
  background: var(--surface-soft);
}

.danger-button {
  color: white;
  background: var(--danger);
}

.danger-button:hover {
  background: var(--danger-hover);
}

.full-button {
  width: 100%;
}

.auth-screen {
  display: grid;
  place-items: center;
  width: min(100% - 32px, 480px);
  marginpadding: 20px 0 48px;
}

.auth-card {
  width: 100%;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.auth-title {
  text-align: center;
  margin-bottom: 22px;
}

.big-icon {
  display: inline-grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin-bottom: 8px;
  border-radius: 16px;
  background: linear-gradient(135deg, #5b7cfa, #a855f7);
  font-size: 28px;
}

.auth-title h2 {
  margin: 0;
  font-size: 1.35rem;
}

.auth-title p {
  margin: 9px 0 0;
  color: var(--sub-text);
  font-size: 0.9rem;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  margin-bottom: 20px;
  border-radius: 12px;
  background: var(--surface-soft);
}

.auth-tab {
  padding: 10px;
  border-radius: 9px;
  color: var(--sub-text);
  background: transparent;
  font-weight: 700;
}

.auth-tab.active {
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.auth-form,
.schedule-form {
  display: grid;
  gap: 15px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  padding: 11px 12px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91, 124, 250, 0.16);
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--sub-text);
  font-size: 0.8rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.small-note,
.input-help {
  color: var(--sub-text);
  font-size: 0.78rem;
  line-height: 1.6;
}

.small-note {
  text-align: center;
  margin: 16px 0 0;
}

.message-area {
  min-height: 20px;
  margin: 0;
  color: var(--danger);
  font-size: 0.85rem;
  white-space: pre-wrap;
}

.main-nav {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto 20px;
  display: flex;
  gap: 8px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}

.nav-button {
  flex: 1;
  padding: 11px;
  border-radius: 10px;
  color: var(--sub-text);
  background: transparent;
  font-weight: 700;
}

.nav-button.active {
  color: white;
  background: var(--primary);
}

.view-section {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 48px;
}

.welcome-row,
.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.welcome-row h2,
.calendar-header h2 {
  margin: 4px 0;
  font-size: 1.5rem;
}

.user-status-text,
.sub-text {
  margin: 0;
  color: var(--sub-text);
  font-size: 0.88rem;
}

.home-grid {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(320px, 1fr);
  gap: 20px;
}

.card {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.card-heading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.card-heading h3,
.legend-card h3 {
  margin: 0;
  font-size: 1.08rem;
}

.card-heading p {
  margin: 7px 0 0;
  color: var(--sub-text);
  font-size: 0.82rem;
}

.card-icon {
  font-size: 1.5rem;
}

.quick-category-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.quick-category-button {
  padding: 8px 10px;
  color: var(--text);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
}

.quick-category-button:hover {
  border-color: var(--primary);
}

.form-row.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 13px;
}

.end-time-preview {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  color: var(--sub-text);
  background: var(--surface-soft);
  border-radius: 10px;
  font-size: 0.88rem;
}

.end-time-preview strong {
  color: var(--primary);
  font-size: 1.1rem;
}

.daily-schedule-list {
  display: grid;
  gap: 10px;
}

.schedule-item {
  width: 100%;
  padding: 14px;
  text-align: left;
  color: var(--text);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-left: 5px solid var(--other);
  border-radius: 12px;
}

.schedule-item:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.08);
}

.schedule-item-top,
.schedule-item-bottom {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.schedule-item-title {
  font-weight: 800;
}

.schedule-item-time,
.schedule-item-bottom {
  margin-top: 7px;
  color: var(--sub-text);
  font-size: 0.8rem;
}

.category-part_time { border-left-color: var(--part-time); }
.category-work { border-left-color: var(--work); }
.category-school { border-left-color: var(--school); }
.category-task { border-left-color: var(--task); }
.category-play { border-left-color: var(--play); }
.category-club { border-left-color: var(--club); }
.category-volunteer { border-left-color: var(--volunteer); }
.category-other { border-left-color: var(--other); }

.empty-message {
  margin: 0;
  padding: 25px 10px;
  text-align: center;
  color: var(--sub-text);
}

.calendar-header {
  justify-content: center;
  text-align: center;
}

.calendar-arrow {
  flex: 0 0 auto;
}

.calendar-card {
  overflow-x: auto;
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(105px, 1fr));
}

.calendar-weekdays > div {
  padding: 10px 4px;
  text-align: center;
  color: var(--sub-text);
  font-size: 0.8rem;
  font-weight: 800;
}

.sunday { color: #ef476f !important; }
.saturday { color: #3b82f6 !important; }

.calendar-day {
  min-height: 120px;
  padding: 8px;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
  background: var(--surface);
}

.calendar-day:nth-child(7n) {
  border-right: 1px solid var(--border);
}

.calendar-day.empty-day {
  background: var(--surface-soft);
}

.calendar-day.today {
  background: rgba(91, 124, 250, 0.08);
}

.day-number {
  display: inline-grid;
  place-items: center;
  width: 25px;
  height: 25px;
  margin-bottom: 5px;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 800;
}

.today .day-number {
  color: white;
  background: var(--primary);
}

.calendar-event {
  display: block;
  width: 100%;
  margin: 3px 0;
  padding: 4px 5px;
  overflow: hidden;
  color: var(--text);
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
  background: var(--surface-soft);
  border: 0;
  border-left: 4px solid var(--other);
  border-radius: 5px;
  font-size: 0.7rem;
}

.legend-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.legend-list span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-dot.part-time { background: var(--part-time); }
.legend-dot.work { background: var(--work); }
.legend-dot.school { background: var(--school); }
.legend-dot.task { background: var(--task); }
.legend-dot.play { background: var(--play); }
.legend-dot.club { background: var(--club); }
.legend-dot.volunteer { background: var(--volunteer); }
.legend-dot.other { background: var(--other); }

.modal {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.58);
}

.modal-content {
  position: relative;
  z-index: 1;
  width: min(100%, 500px);
  padding: 25px;
  background: var(--surface);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.modal-content h2 {
  margin: 0 35px 18px 0;
}

.modal-close-button {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 35px;
  height: 35px;
  color: var(--text);
  background: var(--surface-soft);
  border: 0;
  border-radius: 50%;
  font-size: 1.3rem;
}

.modal-body {
  display: grid;
  gap: 12px;
}

.detail-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.detail-row strong {
  color: var(--sub-text);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 22px;
}

@media (max-width: 760px) {
  .top-header {
    align-items: flex-start;
  }

  .brand p {
    display: none;
  }

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

  .calendar-day {
    min-height: 105px;
  }
}

@media (max-width: 500px) {
  .top-header,
  .view-section,
  .main-nav {
    width: min(100% - 20px, 1200px);
  }

  .top-header {
    padding-top: 12px;
  }

  .brand h1 {
    font-size: 1rem;
  }

  .logout-button {
    padding: 10px;
    font-size: 0.8rem;
  }

  .card,
  .auth-card {
    padding: 18px;
  }

  .form-row.two-columns {
    grid-template-columns: 1fr;
  }

  .welcome-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .modal-actions {
    flex-direction: column-reverse;
  }

  .modal-actions button {
    width: 100%;
  }
}