/* ------------------------------------------ BMS-Fachseiten (Präfix bf-)
   Gemeinsame Teile von /bms/biologie, /bms/chemie, /bms/physik und
   /bms/mathematik (landing/seiten/_bms-fach.mjs): Fächer-Balken,
   Themen-Kacheln, Beispielfrage und Lösungsweg der Physik.
   Farben nur über die Variablen aus stil.css, damit Hell und Dunkel stimmen. */

.r-band .bf-mitte { text-align: center; max-width: 720px; margin-left: auto; margin-right: auto; }

/* Fächer im BMS: waagrechte Balken */
.bf-faecher { margin: 34px 0 30px; padding: 26px 28px 20px; border-radius: 22px; background: var(--r-hell); }
.bf-faecher figcaption { margin-bottom: 14px; text-align: center; font: 700 12.5px/1.3 "Work Sans", sans-serif; letter-spacing: 0.14em; text-transform: uppercase; color: var(--akzent); }
.bf-faecher ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.r-band .bf-faecher li { display: grid; grid-template-columns: 136px minmax(0, 1fr) 64px; gap: 14px; align-items: center; margin: 0; font-size: 16px; line-height: 1.3; }
.r-band .bf-f-name a, .r-band .bf-f-name strong { font: 700 16px/1.2 "Manrope", sans-serif; color: var(--r-kopf); text-decoration: none; }
.r-band .bf-f-name a:hover { color: var(--akzent-tief); text-decoration: underline; text-decoration-color: var(--akzent); text-underline-offset: 3px; }
.bf-f-name a::after { content: " →"; color: var(--akzent); }
.bf-f-spur { position: relative; display: flex; align-items: center; height: 34px; }
.bf-f-spur i { display: block; height: 100%; border-radius: 9px; background: color-mix(in srgb, var(--akzent) 30%, var(--r-weiss)); }
.bf-hier .bf-f-spur i { background: var(--akzent); }
.r-band .bf-f-spur b { margin-left: 10px; font: 800 20px/1 "Manrope", sans-serif; letter-spacing: -0.02em; color: var(--r-kopf); font-variant-numeric: tabular-nums; }
.r-band .bf-hier .bf-f-spur b { color: var(--akzent-tief); }
.bf-f-anteil { text-align: right; font: 400 14px/1 "Work Sans", sans-serif; color: var(--r-leise); white-space: nowrap; font-variant-numeric: tabular-nums; }
.r-band .bf-fuss { margin: 14px 0 0; text-align: center; font-size: 13.5px; line-height: 1.4; color: var(--r-leise); }

/* Themen-Kacheln, ohne Nummern */
.bf-themen { list-style: none; margin: 32px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.r-band .bf-themen > li { display: flex; flex-direction: column; gap: 6px; margin: 0; padding: 20px 22px 22px; border-radius: 20px; background: var(--r-weiss); box-shadow: 0 1px 2px rgba(60, 45, 30, 0.05), 0 18px 40px -30px rgba(60, 45, 30, 0.35); }
.weiss .bf-themen > li { background: var(--r-hell); box-shadow: none; }
.bf-themen > li::before { content: ""; display: block; width: 28px; height: 3px; margin-bottom: 8px; border-radius: 2px; background: var(--akzent); }
.r-band .bf-themen strong { font: 800 18px/1.25 "Manrope", sans-serif; letter-spacing: -0.015em; color: var(--r-kopf); }
.bf-themen li > span { font: 300 15.5px/1.5 "Work Sans", sans-serif; color: var(--r-text); }

/* Beispielfrage Physik */
.r-band .r-testblatt .bf-stamm { margin: 0 0 20px; font: 600 19px/1.5 "Work Sans", sans-serif; color: #1d1916; }
.bf-weg { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.r-band .bf-weg li { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 14px; align-items: baseline; margin: 0; padding: 10px 14px; border-radius: 12px; background: var(--r-weiss); font-size: 16px; line-height: 1.4; }
.bf-weg span { font: 600 12px/1.3 "Work Sans", sans-serif; letter-spacing: 0.08em; text-transform: uppercase; color: var(--r-leise); }
.r-band .bf-weg b { font: 600 17px/1.4 "Work Sans", sans-serif; color: var(--r-kopf); font-variant-numeric: tabular-nums; }
.r-band .bf-weg li:last-child { background: var(--akzent-hauch); }
.r-band .bf-weg li:last-child b { color: var(--akzent-tief); font-weight: 700; }

@media (max-width: 900px) {
  .bf-themen { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .bf-faecher { padding: 20px 16px 16px; }
  .r-band .bf-faecher li { grid-template-columns: 98px minmax(0, 1fr) 54px; gap: 10px; }
  .bf-f-name a::after { content: none; }
  .r-band .bf-f-name a, .r-band .bf-f-name strong { font-size: 15px; }
  .bf-f-anteil { font-size: 13px; }
  .r-band .r-testblatt .bf-stamm { font-size: 17px; }
  .r-band .bf-weg li { grid-template-columns: 1fr; gap: 2px; }
}
@media (max-width: 560px) {
  .bf-themen { grid-template-columns: 1fr; gap: 10px; }
  .r-band .bf-themen > li { padding: 16px 18px 18px; }
}