/* ═══════════════════════════════════════════════════════════════════
   HOME PAGE STYLES
   Subject cards, hero, and home layout
═══════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────
   HERO SECTION
───────────────────────────────────────────────────────────────────── */
.home-hero {
  text-align: center;
  position: relative;
  margin-bottom: 44px;
  padding: 8px 20px 0;
}

.home-hero::before {
  content: '';
  position: absolute;
  top: -96px;
  left: 50%;
  transform: translateX(-50%);
  width: 90vw;
  max-width: 900px;
  height: 440px;
  background:
    radial-gradient(ellipse, rgba(142, 168, 255, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse, rgba(120, 215, 255, 0.1) 0%, transparent 55%);
  pointer-events: none;
  z-index: -1;
}

.home-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #dfe8ff;
  background: rgba(142, 168, 255, 0.1);
  border: 1px solid rgba(142, 168, 255, 0.18);
  padding: 5px 15px;
  border-radius: 99px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.home-eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--plat-green);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.7);
  }
}

.home-title {
  font-family: 'Clash Display', sans-serif;
  font-size: clamp(34px, 6vw, 66px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
}

.home-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--plat-accent) 0%, var(--plat-accent2) 60%, #e87cf5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-sub {
  font-size: 16px;
  color: #cfd9ef;
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.9;
}

.owner-signature {
  display: inline-block;
  margin: 0 auto 28px;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: #e1ebff;
  background: rgba(142, 168, 255, 0.1);
  border: 1px solid rgba(142, 168, 255, 0.2);
  backdrop-filter: blur(10px);
}

.home-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.home-stat {
  text-align: center;
}

.home-stat-n {
  font-family: 'Clash Display', sans-serif;
  font-size: 29px;
  font-weight: 800;
  background: linear-gradient(135deg, #9bb2ff, #7dd6ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-stat-l {
  font-size: 12px;
  color: var(--plat-muted);
  margin-top: 3px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ─────────────────────────────────────────────────────────────────
   SUBJECT SECTION & GRID
───────────────────────────────────────────────────────────────────── */
.subjects-section {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}

.subjects-label {
  font-family: 'Clash Display', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #ebf1ff;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.subjects-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--plat-border);
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}

.subjects-term-block {
  margin-bottom: 28px;
}

.subjects-term-title {
  font-family: 'Clash Display', sans-serif;
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 14px;
  letter-spacing: -0.3px;
  color: #f8fbff;
}

.subjects-level-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.subjects-back-btn {
  border: 1px solid rgba(142, 168, 255, 0.28);
  background: rgba(142, 168, 255, 0.1);
  color: #e6efff;
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.subjects-back-btn:hover {
  color: #ffffff;
  border-color: rgba(142, 168, 255, 0.55);
  background: rgba(142, 168, 255, 0.18);
}

.hub-card {
  background: linear-gradient(180deg, rgba(142, 168, 255, 0.16), rgba(21, 28, 39, 0.98));
  border: 1px solid rgba(174, 197, 255, 0.2);
  border-radius: var(--plat-r);
  padding: 22px;
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: all 0.25s;
}

.hub-card:hover {
  transform: translateY(-4px);
  border-color: rgba(174, 197, 255, 0.48);
  box-shadow: var(--shadow-hover);
}

.hub-card.is-selected {
  border-color: rgba(174, 197, 255, 0.72);
  background: linear-gradient(180deg, rgba(142, 168, 255, 0.22), rgba(29, 40, 58, 1));
}

.hub-card-title {
  font-family: 'Clash Display', sans-serif;
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #ffffff;
}

.hub-card-desc {
  color: #dbe4f7;
  font-size: 14px;
  line-height: 1.75;
}

.subjects-empty {
  background: rgba(142, 168, 255, 0.1);
  border: 1px dashed rgba(174, 197, 255, 0.34);
  border-radius: var(--plat-r);
  padding: 22px;
  color: #f1f6ff;
  font-size: 13px;
}

/* ─────────────────────────────────────────────────────────────────
   SUBJECT CARD
───────────────────────────────────────────────────────────────────── */
.subj-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)), var(--plat-surface);
  border: 1px solid rgba(211, 224, 255, 0.1);
  border-radius: var(--plat-r);
  padding: 26px;
  cursor: default;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
  animation: cardIn 0.5s ease both;
}

.subj-card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at 30% 0%, rgba(142, 168, 255, 0.08) 0%, transparent 58%);
}

.subj-card > * {
  position: relative;
  z-index: 1;
}

.subj-card:not(.coming-soon):hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-hover);
  border-color: rgba(174, 197, 255, 0.28);
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.card-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.card-tag {
  display: inline-block;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.card-title {
  font-family: 'Clash Display', sans-serif;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--plat-text);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 13.5px;
  color: #c9d5eb;
  line-height: 1.7;
  margin-bottom: 18px;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.card-chip {
  font-size: 10.5px;
  font-weight: 500;
  color: #dbe5fb;
  background: rgba(142, 168, 255, 0.08);
  border: 1px solid rgba(211, 224, 255, 0.1);
  padding: 3px 9px;
  border-radius: 6px;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-progress {
  font-size: 11px;
  color: var(--plat-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.progress-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--plat-surf3);
}

.progress-dot.done {
  background: var(--plat-green);
}

.card-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.card-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: all 0.25s;
  white-space: nowrap;
}

.card-btn-review {
  background: rgba(255,255,255,0.02);
  color: #d7e1f6;
  border-color: rgba(211, 224, 255, 0.12);
}

.card-btn-review:hover {
  background: rgba(142, 168, 255, 0.14);
  color: var(--plat-text);
  border-color: rgba(142, 168, 255, 0.34);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(142, 168, 255, 0.14);
}

.card-btn-questions {
  background: rgba(142, 168, 255, 0.12);
  color: #cfe0ff;
  border-color: rgba(142, 168, 255, 0.28);
}

.card-btn-questions:hover {
  background: var(--plat-accent);
  color: #fff;
  border-color: var(--plat-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(142, 168, 255, 0.26);
}

.card-btn-code-review {
  background: rgba(45, 212, 191, 0.12);
  color: #2dd4bf;
  border-color: rgba(45, 212, 191, 0.35);
}

.card-btn-code-review:hover {
  background: #2dd4bf;
  color: #07201c;
  border-color: #2dd4bf;
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(45, 212, 191, 0.3);
}

.subj-card.coming-soon {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

.coming-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--plat-surf3);
  color: var(--plat-muted);
  border: 1px solid var(--plat-border);
  z-index: 2;
}

/* ─────────────────────────────────────────────────────────────────
   BACK BAR (Subject View Navigation)
───────────────────────────────────────────────────────────────────── */
.back-bar {
  background: rgba(21, 28, 39, 0.9);
  border-bottom: 1px solid rgba(211, 224, 255, 0.08);
  padding: 10px 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  backdrop-filter: blur(14px);
}

.back-bar-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 500;
  color: #b9c6df;
  cursor: pointer;
  border: none;
  background: none;
  transition: color 0.2s;
  padding: 4px 0;
}

.back-bar-btn:hover {
  color: #ffffff;
}

.back-bar-btn svg {
  transition: transform 0.2s;
}

.back-bar-btn:hover svg {
  transform: translateX(-3px);
}

.back-bar-subj {
  font-family: 'Clash Display', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: #f4f7ff;
}

.back-bar-sep {
  color: var(--plat-border);
}

.page-enter {
  animation: pageIn 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes pageIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ─────────────────────────────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .home-sub {
    font-size: 15px;
    line-height: 1.65;
    margin-bottom: 28px;
  }

  .owner-signature {
    font-size: 11.5px;
    margin-bottom: 22px;
  }

  .home-stats {
    gap: 18px;
  }

  .subjects-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
  }

  .subj-card {
    padding: 20px;
    border-radius: 16px;
  }

  .card-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .card-progress {
    font-size: 12px;
  }

  .card-actions {
    width: 100%;
  }

  .card-btn {
    flex: 1;
    justify-content: center;
    font-size: 13px;
  }

  .back-bar {
    flex-wrap: wrap;
    row-gap: 8px;
  }

  .back-bar-subj {
    width: 100%;
    font-size: 13px;
  }
}

@media (max-width: 600px) {
  .subjects-section {
    padding: 0 16px 60px;
  }

  .back-bar {
    padding: 10px 16px;
  }

  .card-actions {
    flex-direction: column;
    gap: 6px;
  }

  .card-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .home-eyebrow {
    font-size: 10px;
    letter-spacing: 0.8px;
  }

  .home-title {
    font-size: clamp(28px, 9vw, 40px);
    letter-spacing: -1px;
  }

  .subjects-grid {
    grid-template-columns: 1fr;
  }
}