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

:root {
  --bg:       #0f1117;
  --surface:  #1a1d27;
  --surface2: #22263a;
  --border:   #2e3248;
  --text:     #e2e8f0;
  --muted:    #64748b;
  --accent:   #3b82f6;
  --accent-h: #2563eb;
  --today:    #1e3a5f;
  --has-entry:#1a3a2a;
  --danger:   #dc2626;
  --weekend:  #0e1520;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

.app {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* ── Toolbar ── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.month-title {
  flex: 1;
  text-align: center;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.nav-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
  transition: background 0.15s;
}
.nav-btn:hover { background: var(--border); }

.today-btn {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.today-btn:hover { background: var(--accent-h); }

/* ── Weekday headers ── */
.weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 4px;
}
.weekdays div {
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 4px 0;
}

/* ── Calendar grid ── */
.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.day {
  min-height: 88px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}
.day:hover { border-color: var(--accent); }

.day.empty {
  background: transparent;
  border-color: transparent;
  cursor: default;
}

.day.weekend { background: var(--weekend); }

.day.today {
  background: var(--today);
  border-color: var(--accent);
}

.day.has-entry { background: var(--has-entry); }
.day.today.has-entry { background: #163330; border-color: #22c55e; }

.day-num {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  line-height: 1;
}
.day.today .day-num { color: var(--accent); }

.entry-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.entry-note {
  font-size: 11px;
  color: var(--muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.4;
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-overlay.hidden { display: none; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 420px;
  max-width: 95vw;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-date {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.modal input[type="text"],
.modal textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 10px 12px;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s;
}
.modal input[type="text"]:focus,
.modal textarea:focus { border-color: var(--accent); }

.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.btn-save {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-save:hover { background: var(--accent-h); }

.btn-delete {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-delete:hover { background: rgba(220,38,38,0.12); }

.btn-cancel {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  margin-left: auto;
  transition: background 0.15s;
}
.btn-cancel:hover { background: var(--border); }

.hidden { display: none !important; }