:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-border: #262b36;
  --text: #e8e9ed;
  --muted: #8b909c;
  --accent: #6366f1;
  --accent2: #8b5cf6;
  --danger: #ef4444;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

h1 {
  font-size: 1.5rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logout-btn, .icon-btn {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--muted);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 0.85rem;
}
.logout-btn:hover, .icon-btn:hover { border-color: var(--accent); color: var(--text); }

.add-form {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.add-form input[type="text"] {
  flex: 1;
  min-width: 160px;
  background: #0f1115;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.95rem;
}

.add-form input[type="color"] {
  width: 44px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
}

.add-form select {
  background: #0f1115;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px;
}

.add-form button {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
  color: white;
  border-radius: 8px;
  padding: 10px 18px;
  font-weight: 600;
  cursor: pointer;
}
.add-form button:hover { opacity: 0.9; }

.habit-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 16px;
}

.habit-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.habit-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.05rem;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.streaks {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--muted);
}
.streaks b { color: var(--text); }

.habit-actions { display: flex; gap: 8px; align-items: center; }

.today-toggle {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 2px solid var(--panel-border);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 1rem;
}
.today-toggle.done { border-color: transparent; }

.heatmap {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 1fr);
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.hm-cell {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: #232733;
  cursor: pointer;
}
.hm-cell.future { cursor: default; opacity: 0.3; }
.hm-cell:hover:not(.future) { outline: 1px solid var(--muted); }

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.modal {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 20px;
  width: 320px;
}
.modal h3 { margin-top: 0; }
.modal-row { display: flex; gap: 10px; margin-top: 14px; }
.modal input[type="text"] {
  width: 100%;
  background: #0f1115;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 4px;
}
.modal button {
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-weight: 600;
}
.modal .save { background: var(--accent); color: white; }
.modal .cancel { background: transparent; color: var(--muted); border: 1px solid var(--panel-border); }
.modal .delete { background: var(--danger); color: white; margin-right: auto; }

.login-wrap {
  max-width: 340px;
  margin: 120px auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}
.login-wrap input {
  width: 100%;
  background: #0f1115;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 14px 0;
  text-align: center;
}
.login-wrap button {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
  color: white;
  border-radius: 8px;
  padding: 10px;
  font-weight: 600;
  cursor: pointer;
}
.login-error { color: var(--danger); font-size: 0.85rem; }