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

:root {
  --primary: #7EC8B0;
  --primary-light: #F5FBF8;
  --primary-dark: #5BA68A;
  --text-main: #2D3D36;
  --text-sub: #9CA3AF;
  --bg: #F0FAF6;
  --bg-card: #FFFFFF;
  --accent-pink: #E8A0BF;
  --accent-red: #FCA5A5;
  --accent-yellow: #FDE68A;
  --accent-green: #86EFAC;
  --border: #E5E7EB;
  --pia-bubble: #FDF2F8;

  --radius-card: 16px;
  --radius-btn: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.05);
  --max-w: 520px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h2 { font-size: 16px; font-weight: 700; letter-spacing: 0.02em; }

/* ===== Animations ===== */
.section { animation: fade-up 0.3s ease-out; }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slide-out {
  to { opacity: 0; transform: translateX(60px); height: 0; padding: 0; margin: 0; overflow: hidden; }
}
button:active { transform: scale(0.97); }

/* ===== Layout ===== */
.app-wrapper {
  max-width: var(--max-w);
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-bottom: 72px;
}
@media (min-width: 768px) {
  .app-wrapper { max-width: 640px; }
}

/* ===== Tab Bar ===== */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: center;
  z-index: 200;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.tab-bar-inner {
  display: flex;
  max-width: var(--max-w);
  width: 100%;
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 0 6px;
  font-size: 10px;
  color: var(--text-sub);
  text-decoration: none;
  transition: color 0.15s;
  border: none;
  background: none;
  cursor: pointer;
}
.tab-item.active { color: var(--primary-dark); }
.tab-item svg { width: 22px; height: 22px; }

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 44px;
  padding: 0 20px;
  border: none;
  border-radius: var(--radius-btn);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: var(--primary-light);
  color: var(--primary-dark);
}
.btn-danger {
  background: var(--accent-red);
  color: #fff;
}
.btn-sm {
  height: 34px;
  padding: 0 14px;
  font-size: 13px;
}
.btn-ghost {
  background: transparent;
  color: var(--text-sub);
  border: 1px solid var(--border);
}

/* ===== FAB ===== */
.fab {
  position: fixed;
  bottom: 84px;
  right: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 28px;
  border: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  transition: transform 0.15s;
}
.fab:hover { transform: scale(1.05); }
@media (min-width: 768px) {
  .fab { right: calc(50% - var(--max-w)/2 + 20px); }
}

/* ===== Inputs ===== */
input[type="text"],
input[type="date"],
input[type="number"],
input[type="url"],
input[type="password"],
textarea,
select {
  font-family: inherit;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  background: var(--primary-light);
  color: var(--text-main);
  outline: none;
  width: 100%;
  transition: border-color 0.15s;
}
input:focus, textarea:focus, select:focus { border-color: var(--primary); }

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text-main);
  color: #fff;
  padding: 10px 24px;
  border-radius: 24px;
  font-size: 13px;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 999;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Modal ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 300;
  align-items: flex-end;
  justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  padding: 24px;
  width: 100%;
  max-width: var(--max-w);
  max-height: 90dvh;
  overflow-y: auto;
  animation: slide-up 0.3s ease-out;
}
@keyframes slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.modal-header h2 { font-size: 18px; }
.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-sub);
  cursor: pointer;
  padding: 4px;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-sub);
  margin-bottom: 6px;
}

/* ===== Pia-chan ===== */
.pia-comment {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.pia-icon-sm {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.pia-icon-lg {
  width: 120px;
  height: 120px;
  object-fit: contain;
}
.pia-bubble {
  background: var(--pia-bubble);
  border-radius: 16px;
  padding: 10px 16px;
  font-size: 14px;
  line-height: 1.6;
  flex: 1;
  position: relative;
}
.pia-bubble::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 14px;
  width: 12px;
  height: 12px;
  background: var(--pia-bubble);
  border-radius: 2px;
  transform: rotate(45deg);
}

/* ===== Progress bar ===== */
.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* ===== Project card ===== */
.project-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.project-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.project-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.project-type-icon { font-size: 18px; }
.project-name { font-weight: 700; font-size: 15px; flex: 1; }
.project-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-sub);
  margin-top: 8px;
}

/* ===== Status filter ===== */
.status-filter {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.filter-btn {
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 13px;
  color: var(--text-sub);
  cursor: pointer;
  transition: all 0.15s;
}
.filter-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== Task item ===== */
.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: opacity 0.3s;
}
.task-item:last-child { border-bottom: none; }
.task-check {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--border);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
}
.task-check:hover { border-color: var(--primary); }
.task-check.doing {
  border-color: var(--primary);
  background: var(--primary-light);
}
.task-check.done {
  border-color: var(--primary);
  background: var(--primary);
}
.task-content { flex: 1; min-width: 0; }
.task-text { font-size: 14px; word-break: break-word; }
.task-text.done { text-decoration: line-through; color: var(--text-sub); }
.task-meta {
  font-size: 11px;
  color: var(--text-sub);
  margin-top: 2px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.task-meta.overdue { color: var(--accent-red); }
.priority-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.priority-dot.high { background: var(--accent-red); }
.priority-dot.mid { background: var(--accent-yellow); }
.priority-dot.low { background: var(--text-sub); }
.phase-label {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary-dark);
}
.milestone-badge {
  font-size: 11px;
  color: var(--accent-pink);
}

/* ===== Section header ===== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 8px;
}
.section-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}
.section-count {
  font-size: 12px;
  color: var(--text-sub);
}

/* ===== Empty state ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 40px 20px;
  text-align: center;
  color: var(--text-sub);
  font-size: 14px;
}

/* ===== Color picker ===== */
.color-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.color-option {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
}
.color-option.selected { border-color: var(--text-main); transform: scale(1.1); }

/* ===== Quick add ===== */
.quick-add {
  position: fixed;
  bottom: 68px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  padding: 0 12px;
  z-index: 100;
}
.quick-add-inner {
  display: flex;
  gap: 8px;
  max-width: var(--max-w);
  width: 100%;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 10px 14px;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.08);
  border: 1px solid var(--border);
}
.quick-add input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 0;
}
.quick-add input:focus { border: none; box-shadow: none; }

/* ===== AI action buttons ===== */
.ai-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 12px 0;
}
.ai-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  border-radius: 20px;
  border: 1px solid var(--accent-pink);
  background: var(--pia-bubble);
  color: var(--text-main);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.ai-btn:hover { background: var(--accent-pink); color: #fff; }

/* ===== GitHub section ===== */
.github-section {
  background: #F6F8FA;
  border-radius: var(--radius-card);
  padding: 16px;
}
.commit-item {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.commit-item:last-child { border-bottom: none; }

/* ===== Dashboard mini card ===== */
.mini-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}
.mini-card-title {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
}

/* ===== Loading ===== */
.loading {
  display: flex;
  justify-content: center;
  padding: 20px;
}
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Checkbox list (AI suggestions) ===== */
.check-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.check-list-item:last-child { border-bottom: none; }
.check-list-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
}

/* ===== Type toggle ===== */
.type-toggle {
  display: flex;
  gap: 8px;
}
.type-btn {
  flex: 1;
  padding: 12px;
  border-radius: var(--radius-btn);
  border: 2px solid var(--border);
  background: var(--bg-card);
  font-size: 14px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}
.type-btn.selected {
  border-color: var(--primary);
  background: var(--primary-light);
}

/* ===== Responsive ===== */
@media (max-width: 375px) {
  .project-card { padding: 12px 14px; }
  .card { padding: 14px; }
}