/* StudySprint webApp — plain words, one-thumb targets >= 48px. */
* { box-sizing: border-box; }
body { font-family: system-ui, sans-serif; margin: 0 auto;
       max-width: 44rem; padding: 1rem; color: #1a1a1a;
       background: #fdfdf8; }
header h1 { margin-bottom: 0; color: #14532d; }
button, select { min-height: 48px; min-width: 48px;
textarea, input[type="text"] { width: 100%; box-sizing: border-box;
  font: inherit; padding: 8px; margin: 4px 0; }
                 padding: 0.6rem 1rem; font-size: 1rem;
                 border-radius: 0.6rem; border: 1px solid #14532d;
                 background: #eef7ee; cursor: pointer; }
button:active { background: #d7ecd7; }
.tab.active { background: #14532d; color: #fff; }
nav#tabs { display: flex; flex-wrap: wrap; gap: 0.5rem;
           margin: 1rem 0; }
.row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.5rem 0; }
.hidden { display: none; }
.card { border: 2px solid #14532d; border-radius: 0.8rem;
        padding: 1rem; margin: 0.5rem 0; font-size: 1.15rem;
        min-height: 4.5rem; }
#reader-word { font-size: 2rem; text-align: center;
               min-height: 3.5rem; margin: 1rem 0; }
.session { display: flex; justify-content: space-between;
           align-items: center; gap: 0.5rem; padding: 0.4rem 0;
           border-bottom: 1px solid #ddd; }
pre { overflow-x: auto; background: #f2f2ea; padding: 0.8rem;
      border-radius: 0.6rem; }
footer { margin-top: 2rem; color: #555; font-size: 0.9rem; }

/* Iteration 4 (#4417): book terms + annotations + hardening */
#reader-text { white-space: pre-wrap; line-height: 1.65;
               margin-top: 1rem; }
#reader-text .term { background: #fdf3c4; border: none;
                     border-bottom: 2px solid #d9a400;
                     font: inherit; padding: 0 0.1rem;
                     cursor: pointer; }
#term-panel { background: #f7f7ef; border: 1px solid #d9d4a5;
              border-radius: 0.6rem; padding: 0.8rem;
              margin-top: 0.8rem; }
.annotation blockquote { margin: 0.4rem 0; padding-left: 0.8rem;
                         border-left: 3px solid #b7ac5a;
                         color: #444; }
.meta { color: #555; font-size: 0.9rem; }