/* ============================================================
   Habit Tracker — minimal, mobile-friendly stylesheet
   Color variables defined once; reused across all views.
   ============================================================ */

:root {
  --color-completed: #2da44e;   /* green  — done / good threshold */
  --color-partial:   #d1a726;   /* amber  — between thresholds    */
  --color-failed:    #cf222e;   /* red    — failed / unlogged      */
  --color-skipped:   #8c959f;   /* grey   — intentionally skipped */
  --color-na:        #ffffff;   /* white  — not applicable / future */
  --color-none:      #ebedf0;   /* light grey — no data yet        */

  --bg:     #f6f8fa;
  --surface: #ffffff;
  --border:  #d0d7de;
  --text:    #24292f;
  --text-muted: #57606a;

  --radius: 8px;
  --gap: 12px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
       background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5; }
a { color: inherit; text-decoration: none; }

/* ---- Navigation ---- */
nav { background: var(--surface); border-bottom: 1px solid var(--border);
      padding: 0 16px; display: flex; gap: 4px; }
.nav-link { padding: 12px 14px; display: inline-block; font-weight: 500;
            border-bottom: 2px solid transparent; }
.nav-link:hover { border-bottom-color: var(--color-completed); }

/* ---- Main layout ---- */
main { max-width: 900px; margin: 0 auto; padding: 20px 16px; }
h1 { font-size: 1.4rem; margin-bottom: 16px; }
h2 { font-size: 1.1rem; margin: 24px 0 12px; }

/* ---- Today: habit cards ---- */
.habit-grid { display: grid; gap: var(--gap);
              grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

.habit-card { background: var(--surface); border: 1px solid var(--border);
              border-radius: var(--radius); padding: 14px; border-left: 4px solid var(--border); }

.habit-card.status-completed { border-left-color: var(--color-completed); }
.habit-card.status-partial    { border-left-color: var(--color-partial); }
.habit-card.status-failed     { border-left-color: var(--color-failed); }
.habit-card.status-skipped    { border-left-color: var(--color-skipped); }

.habit-header { display: flex; justify-content: space-between; align-items: center;
                margin-bottom: 8px; }
.habit-name { font-weight: 600; }
.streak-badge { font-size: 0.85rem; color: var(--text-muted); }

.habit-status { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 10px;
                text-transform: capitalize; }

.log-form { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.numeric-input { width: 80px; padding: 4px 8px; border: 1px solid var(--border);
                 border-radius: 4px; font-size: 0.9rem; }

/* ---- Buttons ---- */
.btn { padding: 5px 12px; border: none; border-radius: 4px; cursor: pointer;
       font-size: 0.85rem; font-weight: 500; }
.btn-done { background: var(--color-completed); color: white; }
.btn-fail { background: var(--color-failed);    color: white; }
.btn-skip { background: var(--color-skipped);   color: white; }
.btn-log  { background: #0969da;                color: white; }
.btn:hover { opacity: 0.85; }

/* ---- Heatmap ---- */
#heatmap-container svg { display: block; overflow: visible; }
.hm-cell { rx: 2; }
.hm-tooltip { position: fixed; background: #24292f; color: #fff;
              font-size: 0.78rem; padding: 4px 8px; border-radius: 4px;
              pointer-events: none; white-space: nowrap; z-index: 100; }

/* ---- Calendar ---- */
#calendar-container { overflow-x: auto; }
#calendar-container svg { display: block; }
.cal-cell { rx: 2; cursor: default; }

/* ---- Legend swatches ---- */
.legend { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px;
          font-size: 0.82rem; align-items: center; }
.swatch { display: inline-flex; align-items: center; gap: 4px; }
.swatch::before { content: ""; display: inline-block; width: 14px; height: 14px;
                  border-radius: 2px; border: 1px solid rgba(0,0,0,0.15); }
.swatch-completed::before { background: var(--color-completed); }
.swatch-partial::before   { background: var(--color-partial); }
.swatch-failed::before    { background: var(--color-failed); }
.swatch-skipped::before   { background: var(--color-skipped); }
.swatch-future::before    { background: var(--color-na); }
.swatch-none::before      { background: var(--color-none); }
.swatch-low::before       { background: #9be9a8; }
.swatch-mid::before       { background: var(--color-partial); }
.swatch-high::before      { background: var(--color-completed); }

/* ---- Habits table ---- */
.habits-table { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.habits-table th, .habits-table td { padding: 8px 12px; border: 1px solid var(--border);
                                     font-size: 0.9rem; text-align: left; }
.habits-table th { background: var(--bg); font-weight: 600; }

/* ---- Forms ---- */
.add-form, .inline-form { display: flex; flex-direction: column; gap: 10px; }
.form-row { display: flex; flex-wrap: wrap; gap: 12px; }
.form-row label { display: flex; flex-direction: column; gap: 4px;
                  font-size: 0.85rem; font-weight: 500; }
.form-row input, .form-row select { padding: 5px 8px; border: 1px solid var(--border);
                                    border-radius: 4px; font-size: 0.9rem; }
.habit-selector-form { margin-bottom: 16px; }
.habit-selector { padding: 6px 10px; border: 1px solid var(--border);
                  border-radius: 4px; font-size: 0.9rem; }
details summary { cursor: pointer; color: #0969da; font-size: 0.85rem; margin-bottom: 6px; }

/* ---- Misc ---- */
.empty { color: var(--text-muted); font-style: italic; }