/* ===================================================
   PAUL — Fächer Page CSS
   Extends home.css — same design language
   =================================================== */

/* ── Active nav link */
.nav-active {
  color: var(--white) !important;
}
.nav-active::after {
  right: 0 !important;
  box-shadow: 0 0 8px var(--glow-violet) !important;
}

/* ──────────────────────────────────────────
   PAGE HERO (compact version of hero)
────────────────────────────────────────── */
.page-hero {
  min-height: 52vh;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 120px clamp(20px, 6vw, 80px) 60px;
  position: relative;
  text-align: center;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 70% at 50% 40%,
    rgba(59,130,246,0.10) 0%,
    rgba(139,92,246,0.07) 45%,
    transparent 70%);
  pointer-events: none;
}

.page-hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 700px;
}

.page-hero .hero-title {
  font-size: clamp(2.4rem, 6vw, 4.4rem);
}

/* ──────────────────────────────────────────
   SUBJECTS SECTION
────────────────────────────────────────── */
.subjects-section {
  padding-top: 20px;
  padding-bottom: clamp(80px, 12vw, 140px);
}

/* ──────────────────────────────────────────
   SUBJECTS GRID
────────────────────────────────────────── */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
}

/* ──────────────────────────────────────────
   SUBJECT CARD BASE
────────────────────────────────────────── */
.subject-card {
  position: relative;
  border-radius: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  overflow: hidden;
  cursor: pointer;
  display: block;
  min-height: 420px;

  /* Enter animation state */
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity    0.65s var(--ease-out),
    transform  0.65s var(--ease-out),
    box-shadow 0.45s var(--ease-out),
    border-color 0.45s;
}

.subject-card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.subject-card:nth-child(1) { transition-delay: 0.05s; }
.subject-card:nth-child(2) { transition-delay: 0.15s; }
.subject-card:nth-child(3) { transition-delay: 0.25s; }
.subject-card:nth-child(4) { transition-delay: 0.35s; }

/* Shimmer sweep on hover */
.subject-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -70%;
  width: 55%;
  height: 200%;
  background: linear-gradient(105deg,
    transparent 20%,
    rgba(255,255,255,0.06) 50%,
    transparent 80%);
  transform: skewX(-15deg);
  transition: left 0.65s var(--ease-out);
  pointer-events: none;
  z-index: 3;
}
.subject-card:hover::before { left: 130%; }

.subject-card:hover {
  transform: translateY(-8px) scale(1.012);
  border-color: rgba(139,92,246,0.32);
  box-shadow:
    0 24px 70px rgba(0,0,0,0.45),
    0 0 0 1px rgba(139,92,246,0.28),
    0 0 48px rgba(139,92,246,0.12);
}

/* ── Card background gradient (per subject) */
.subject-card-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  transition: opacity 0.4s;
}

/* AIF — Electric Blue */
.aif-card .subject-card-bg {
  background: linear-gradient(140deg,
    rgba(37,99,235,0.22) 0%,
    rgba(59,130,246,0.10) 60%,
    transparent 100%);
}
/* KMD — Neon Green */
.kmd-card .subject-card-bg {
  background: linear-gradient(140deg,
    rgba(22,163,74,0.22) 0%,
    rgba(74,222,128,0.10) 60%,
    transparent 100%);
}
/* OFM — Warm Amber */
.ofm-card .subject-card-bg {
  background: linear-gradient(140deg,
    rgba(217,119,6,0.22) 0%,
    rgba(245,158,11,0.12) 60%,
    transparent 100%);
}
/* MBK — Fuchsia */
.mbk-card .subject-card-bg {
  background: linear-gradient(140deg,
    rgba(192,38,211,0.22) 0%,
    rgba(232,121,249,0.12) 60%,
    transparent 100%);
}

/* ── Orb glow (per subject) */
.subject-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.28;
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.45s, transform 0.6s var(--ease-out);
  width: 280px; height: 280px;
  top: -60px; right: -60px;
}
.subject-card:hover .subject-orb {
  opacity: 0.45;
  transform: scale(1.15);
}
.aif-card  .subject-orb { background: #2563eb; }
.kmd-card  .subject-orb { background: #16a34a; }
.ofm-card  .subject-orb { background: #d97706; top: auto; bottom: -60px; left: -40px; right: auto; }
.mbk-card  .subject-orb { background: #c026d3; top: auto; bottom: -60px; right: -40px; }

/* ── Inner layout */
.subject-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 32px;
  gap: 0;
}

/* Top row: icon + abbr */
.subject-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.subject-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--glass-border);
  display: grid;
  place-items: center;
  color: var(--white-dim);
  flex-shrink: 0;
  transition: background 0.3s, color 0.3s, box-shadow 0.3s;
}
.subject-card:hover .subject-icon {
  color: var(--white);
  background: rgba(255,255,255,0.12);
}
.aif-card:hover  .subject-icon { box-shadow: 0 0 20px rgba(37,99,235,0.55); }
.kmd-card:hover  .subject-icon { box-shadow: 0 0 20px rgba(22,163,74,0.55); }
.ofm-card:hover  .subject-icon { box-shadow: 0 0 20px rgba(217,119,6,0.55); }
.mbk-card:hover  .subject-icon { box-shadow: 0 0 20px rgba(192,38,211,0.55); }

.subject-icon svg { width: 26px; height: 26px; }

.subject-abbr {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 2.8rem;
  letter-spacing: -0.04em;
  line-height: 1;
  /* per-card gradient */
}
/* AIF — Blue */
.aif-card .subject-abbr {
  background: linear-gradient(135deg, #3b82f6, #93c5fd);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
/* KMD — Green */
.kmd-card .subject-abbr {
  background: linear-gradient(135deg, #16a34a, #86efac);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
/* OFM — Amber */
.ofm-card .subject-abbr {
  background: linear-gradient(135deg, #d97706, #fcd34d);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
/* MBK — Fuchsia */
.mbk-card .subject-abbr {
  background: linear-gradient(135deg, #c026d3, #f0abfc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* Body */
.subject-body { flex: 1; display: flex; flex-direction: column; }

.subject-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--white);
  margin-bottom: 16px;
  transition: color 0.3s;
}

.subject-desc {
  font-size: 0.92rem;
  font-weight: 300;
  color: var(--white-muted);
  line-height: 1.72;
  flex: 1;
  transition: color 0.3s;
}
.subject-card:hover .subject-desc { color: var(--white-dim); }

/* Tags */
.subject-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin-top: 22px;
}
.subject-tags li {
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--white-muted);
  transition: background 0.3s, color 0.3s, border-color 0.3s;
}
.subject-card:hover .subject-tags li {
  color: var(--white-dim);
  border-color: rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.09);
}

/* Arrow */
.subject-arrow {
  position: absolute;
  top: 28px; right: 28px;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--glass-border);
  display: grid;
  place-items: center;
  opacity: 0;
  transform: translate(-6px, 6px);
  transition: opacity 0.35s, transform 0.4s var(--ease-out),
              background 0.3s, box-shadow 0.3s;
  z-index: 4;
}
.subject-card:hover .subject-arrow {
  opacity: 1;
  transform: translate(0,0);
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 0 18px var(--glow-violet);
}
.subject-arrow svg { width: 15px; height: 15px; }

/* ──────────────────────────────────────────
   RESPONSIVE
────────────────────────────────────────── */
@media (max-width: 860px) {
  .subjects-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
  }
  .subject-card { min-height: 360px; }
  .subject-card:nth-child(1),
  .subject-card:nth-child(2),
  .subject-card:nth-child(3),
  .subject-card:nth-child(4) { transition-delay: 0.05s; }
}

@media (max-width: 480px) {
  .subject-inner { padding: 24px; }
  .subject-abbr  { font-size: 2.2rem; }
  .subject-card  { min-height: 320px; }
  .page-hero     { min-height: 44vh; }
}