:root {
  --bg: #f6f7f4;
  --surface: #ffffff;
  --border: #e2e5dd;
  --text: #1f2a1f;
  --muted: #6b7568;
  --accent: #3f7d4a;
  --accent-dark: #2e5c37;
  --accent-soft: #e6f1e6;
  --warn: #b5622a;
  --warn-soft: #fbeadd;
  --shadow: 0 1px 2px rgba(30, 40, 25, 0.06), 0 4px 16px rgba(30, 40, 25, 0.05);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141813;
    --surface: #1c2119;
    --border: #2b3226;
    --text: #e8ece3;
    --muted: #9aa691;
    --accent: #6fbf76;
    --accent-dark: #8fd396;
    --accent-soft: #223224;
    --warn: #e2965a;
    --warn-soft: #2e2317;
    --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 4px 20px rgba(0,0,0,0.35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

#app { max-width: 1080px; margin: 0 auto; padding: 0 20px 60px; }

.app-header {
  padding: 24px 0 12px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.brand-mark {
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 6px 10px;
}
.brand h1 { margin: 0; font-size: 1.4rem; }
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 0.9rem; }

.tabs { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.tab-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}
.tab-btn:hover { background: var(--accent-soft); color: var(--text); }
.tab-btn.active { background: var(--accent); color: #fff; }

.panel { display: none; padding-top: 22px; }
.panel.active { display: block; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}

h2 { font-size: 1.15rem; margin: 0 0 14px; }
h2 .muted, h3 { font-weight: 500; }
.muted { color: var(--muted); font-size: 0.88rem; }

.today-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-bottom: 18px; }
.today-card h3 { margin: 0 0 10px; font-size: 1rem; }
.today-card .kicker { text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.72rem; color: var(--accent-dark); font-weight: 700; margin-bottom: 4px; }
.today-card ul { margin: 8px 0 0; padding-left: 18px; }
.today-card li { margin-bottom: 4px; font-size: 0.92rem; }
.bulk-flag { display: inline-block; background: var(--warn-soft); color: var(--warn); font-size: 0.72rem; font-weight: 700; border-radius: 6px; padding: 2px 6px; margin-left: 6px; }

.tips-card { margin-top: 4px; }
.tips-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.tip { border-left: 3px solid var(--accent); padding-left: 10px; }
.tip strong { display: block; font-size: 0.92rem; margin-bottom: 2px; }
.tip span { font-size: 0.86rem; color: var(--muted); }

.panel-toolbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.week-switch { display: flex; gap: 6px; }
.week-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
}
.week-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.week-title { color: var(--muted); margin: 6px 0 18px; font-size: 0.9rem; }

.days-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.day-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px; }
.day-card h3 { margin: 0 0 10px; font-size: 1.02rem; }
.meal-row { padding: 8px 0; border-top: 1px dashed var(--border); }
.meal-row:first-of-type { border-top: none; }
.meal-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--accent-dark); font-weight: 700; }
.meal-name { font-size: 0.92rem; margin-top: 2px; }
.meal-kcal { color: var(--muted); font-size: 0.8rem; }
.recipe-link { background: none; border: none; color: var(--accent-dark); font-weight: 600; font-size: 0.82rem; cursor: pointer; padding: 0; margin-top: 4px; text-decoration: underline; }

.exercise-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px; }
.exercise-card.optional { opacity: 0.85; }
.exercise-card h3 { margin: 0; font-size: 1.02rem; }
.exercise-type { display: inline-block; background: var(--accent-soft); color: var(--accent-dark); font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; border-radius: 6px; padding: 2px 8px; margin-bottom: 6px; }
.exercise-card ul { margin: 8px 0; padding-left: 18px; font-size: 0.9rem; }
.exercise-note { font-size: 0.85rem; color: var(--muted); margin-top: 6px; }

.recipes-list { display: flex; flex-direction: column; gap: 16px; }
.recipe-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 20px; transition: box-shadow 0.3s ease, border-color 0.3s ease; }
.recipe-card.highlight { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow); }
.recipe-card h3 { margin: 0 0 4px; }
.recipe-meta { color: var(--muted); font-size: 0.85rem; margin-bottom: 10px; }
.recipe-columns { display: grid; grid-template-columns: 1fr 1.4fr; gap: 20px; }
@media (max-width: 640px) { .recipe-columns { grid-template-columns: 1fr; } }
.recipe-card h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--accent-dark); margin: 0 0 6px; }
.recipe-card ul, .recipe-card ol { margin: 0; padding-left: 20px; font-size: 0.92rem; }
.recipe-card li { margin-bottom: 5px; }
.recipe-tip { background: var(--accent-soft); border-radius: 8px; padding: 8px 12px; font-size: 0.85rem; margin-top: 12px; }

.grocery-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-top: 14px; }
.grocery-group h4 { font-size: 0.85rem; text-transform: uppercase; color: var(--accent-dark); margin: 0 0 8px; }
.grocery-item { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; padding: 4px 0; }
.grocery-item input { width: 16px; height: 16px; }
.grocery-item.checked label { text-decoration: line-through; color: var(--muted); }
.ghost-btn { background: none; border: 1px solid var(--border); color: var(--text); padding: 6px 14px; border-radius: 8px; cursor: pointer; font-size: 0.85rem; margin: 10px 0; }
.ghost-btn:hover { background: var(--accent-soft); }

.progress-setup { max-width: 420px; display: flex; flex-direction: column; gap: 12px; }
.progress-setup label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; }
input, button { font-family: inherit; font-size: 0.92rem; }
input[type="number"], input[type="date"] {
  padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
#setStartBtn, .log-form button {
  background: var(--accent); color: #fff; border: none; padding: 9px 16px; border-radius: 8px; cursor: pointer; font-weight: 600;
}

.progress-body { display: flex; flex-direction: column; gap: 16px; }
.goal-header { display: flex; align-items: center; gap: 18px; }
.goal-num { font-size: 1.8rem; font-weight: 800; color: var(--accent-dark); }
.goal-arrow { color: var(--muted); font-size: 1.4rem; }
.progress-bar-track { height: 12px; background: var(--accent-soft); border-radius: 8px; margin: 14px 0 6px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--accent); border-radius: 8px; width: 0%; transition: width 0.4s ease; }

.log-form { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
#progressChart { width: 100%; max-width: 600px; height: 180px; margin: 10px 0; }
.log-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.log-table th, .log-table td { text-align: left; padding: 6px 8px; border-top: 1px solid var(--border); }
.log-table button { background: none; border: none; color: var(--warn); cursor: pointer; font-size: 0.8rem; }

.app-footer { margin-top: 30px; color: var(--muted); font-size: 0.8rem; text-align: center; }

@media (max-width: 520px) {
  .tabs { gap: 4px; }
  .tab-btn { padding: 6px 9px; font-size: 0.82rem; }
}