:root {
  --navy: #070d1a;
  --navy2: #0d1b2e;
  --navy3: #122338;
  --gold: #d4a843;
  --gold2: #f0c55a;
  --gold3: #ffe9a3;
  --ice: #c8dff7;
  --glow: rgba(212, 168, 67, 0.18);
  --card-bg: rgba(18, 35, 60, 0.82);
  --glass: rgba(255, 255, 255, 0.06);
  --border: rgba(212, 168, 67, 0.25);
  --nav-h: 80px;
  --radius: 20px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  font-family: "Outfit", sans-serif;
  background: var(--navy);
  color: #e8eef5;
  overflow-x: hidden;
}

/* ── STARFIELD ── */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(
      ellipse 80% 50% at 50% 0%,
      rgba(50, 90, 160, 0.28) 0%,
      transparent 70%
    ),
    radial-gradient(
      ellipse 60% 40% at 20% 80%,
      rgba(120, 60, 200, 0.15) 0%,
      transparent 60%
    ),
    radial-gradient(
      ellipse 50% 50% at 80% 30%,
      rgba(212, 168, 67, 0.08) 0%,
      transparent 60%
    );
  pointer-events: none;
}
.stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.stars span {
  position: absolute;
  border-radius: 50%;
  background: white;
  animation: twinkle var(--d, 3s) var(--del, 0s) infinite alternate;
}
@keyframes twinkle {
  0% {
    opacity: 0.1;
    transform: scale(1);
  }
  100% {
    opacity: 0.8;
    transform: scale(1.6);
  }
}

/* ── LAYOUT ── */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding-bottom: calc(var(--nav-h) + 20px);
  display: flex;
  flex-direction: column;
}

/* ── HERO ── */
.hero {
  text-align: center;
  padding: 2.5rem 1.5rem 2rem;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 5%;
  right: 5%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(212, 168, 67, 0.12);
  border: 1px solid rgba(212, 168, 67, 0.3);
  padding: 6px 18px;
  border-radius: 40px;
  font-family: "DM Mono", monospace;
  font-size: 0.72rem;
  color: var(--gold2);
  letter-spacing: 0.05em;
  margin-bottom: 1.2rem;
}
.hero-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold2);
  animation: pulse-dot 1.5s infinite;
}
@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.7);
  }
}
.hero h1 {
  font-family: "Cinzel Decorative", serif;
  font-size: clamp(1.5rem, 5vw, 2.8rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.02em;
  background: linear-gradient(
    135deg,
    var(--gold3) 0%,
    var(--gold) 40%,
    #fff8e2 70%,
    var(--gold2) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 2px 12px rgba(212, 168, 67, 0.3));
  margin-bottom: 0.6rem;
}
.hero-sub {
  font-size: 0.88rem;
  color: rgba(200, 223, 247, 0.65);
  font-weight: 300;
  letter-spacing: 0.03em;
}

/* ── PANEL ── */
#panel {
  flex: 1;
  padding: 1.5rem 1.2rem;
}

/* ── WELCOME ── */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 52vh;
  text-align: center;
  gap: 1.4rem;
  animation: fadeUp 0.5s ease;
}
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.vault-3d {
  width: 120px;
  height: 120px;
  perspective: 400px;
  margin: 0 auto;
  cursor: pointer;
}
.vault-cube {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  animation: spin3d 8s linear infinite;
}
@keyframes spin3d {
  0% {
    transform: rotateX(15deg) rotateY(0deg);
  }
  100% {
    transform: rotateX(15deg) rotateY(360deg);
  }
}
.face {
  position: absolute;
  inset: 0;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.8rem;
  border: 2px solid rgba(212, 168, 67, 0.4);
  background: radial-gradient(
    circle at center,
    rgba(212, 168, 67, 0.15),
    rgba(13, 27, 46, 0.9)
  );
  backdrop-filter: blur(8px);
}
.face.front {
  transform: translateZ(60px);
}
.face.back {
  transform: translateZ(-60px) rotateY(180deg);
}
.face.left {
  transform: translateX(-60px) rotateY(-90deg);
}
.face.right {
  transform: translateX(60px) rotateY(90deg);
}
.face.top {
  transform: translateY(-60px) rotateX(90deg);
}
.face.bottom {
  transform: translateY(60px) rotateX(-90deg);
}

.welcome h2 {
  font-family: "Cinzel Decorative", serif;
  font-size: 1.2rem;
  font-weight: 700;
  background: linear-gradient(120deg, var(--gold3), var(--gold2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.welcome p {
  font-size: 0.85rem;
  color: rgba(200, 223, 247, 0.55);
  max-width: 320px;
  line-height: 1.7;
}
.key-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(212, 168, 67, 0.1);
  border: 1px solid rgba(212, 168, 67, 0.2);
  border-radius: 30px;
  padding: 8px 20px;
  font-family: "DM Mono", monospace;
  font-size: 0.76rem;
  color: var(--gold2);
}

/* ── CONTENT SECTION ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.4rem;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeUp 0.35s ease;
}
.section-title {
  font-family: "Cinzel Decorative", serif;
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(120deg, var(--gold3), var(--gold2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(212, 168, 67, 0.1);
  border: 1px solid rgba(212, 168, 67, 0.3);
  color: var(--gold2);
  border-radius: 40px;
  padding: 8px 20px;
  font-family: "Outfit", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.02em;
}
.btn-back:hover {
  background: rgba(212, 168, 67, 0.2);
  transform: translateY(-1px);
}
.btn-back svg {
  width: 14px;
  height: 14px;
}

/* ── SYLLABUS CARD 3D ── */
.syllabus-3d {
  perspective: 800px;
  margin-bottom: 1.6rem;
  cursor: pointer;
  animation: fadeUp 0.4s ease;
}
.syllabus-inner {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  transition:
    transform 0.4s ease,
    box-shadow 0.4s ease;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(212, 168, 67, 0.08);
}
.syllabus-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(212, 168, 67, 0.06) 0%,
    transparent 60%
  );
  pointer-events: none;
}
.syllabus-3d:hover .syllabus-inner {
  transform: rotateX(-4deg) rotateY(3deg) translateY(-4px);
  box-shadow:
    0 20px 50px rgba(0, 0, 0, 0.5),
    0 0 30px rgba(212, 168, 67, 0.12);
}
.syllabus-img-wrap {
  width: 90px;
  height: 70px;
  flex-shrink: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(212, 168, 67, 0.2);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}
.syllabus-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.syllabus-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gold2);
  margin-bottom: 4px;
}
.syllabus-info p {
  font-size: 0.78rem;
  color: rgba(200, 223, 247, 0.5);
  line-height: 1.5;
}
.open-tag {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  color: var(--gold);
  background: rgba(212, 168, 67, 0.08);
  border: 1px solid rgba(212, 168, 67, 0.15);
  border-radius: 20px;
  padding: 3px 10px;
}

/* ── UNITS GRID ── */
.units-label {
  font-family: "DM Mono", monospace;
  font-size: 0.72rem;
  color: rgba(212, 168, 67, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.9rem;
  animation: fadeUp 0.45s ease;
}
.units-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 1rem;
  animation: fadeUp 0.5s ease;
}
.unit-card {
  background: var(--card-bg);
  border: 1px solid rgba(212, 168, 67, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  transform-style: preserve-3d;
  perspective: 600px;
}
.unit-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.unit-card:hover {
  transform: translateY(-8px) rotateX(-5deg) scale(1.02);
  box-shadow:
    0 20px 45px rgba(0, 0, 0, 0.5),
    0 0 20px rgba(212, 168, 67, 0.1);
  border-color: rgba(212, 168, 67, 0.4);
}
.unit-card:hover::after {
  opacity: 1;
}
.unit-num {
  background: linear-gradient(
    135deg,
    rgba(212, 168, 67, 0.18),
    rgba(212, 168, 67, 0.06)
  );
  padding: 0.65rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(212, 168, 67, 0.12);
}
.unit-num-text {
  font-family: "Cinzel Decorative", serif;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--gold2);
  letter-spacing: 0.08em;
}
.unit-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px var(--gold);
}
.unit-body {
  padding: 0.8rem 0.85rem 0.9rem;
}
.unit-icon {
  font-size: 1.6rem;
  margin-bottom: 0.4rem;
  display: block;
}
.unit-name {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ice);
  line-height: 1.35;
  margin-bottom: 6px;
}
.unit-cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: "DM Mono", monospace;
  font-size: 0.65rem;
  color: var(--gold);
  background: rgba(212, 168, 67, 0.08);
  border: 1px solid rgba(212, 168, 67, 0.15);
  border-radius: 20px;
  padding: 3px 9px;
}

/* ── VIEWER OVERLAY ── */
#viewer {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(4, 10, 22, 0.92);
  backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
  opacity: 0;
  transition: all 0.25s;
}
#viewer.active {
  visibility: visible;
  opacity: 1;
}
.viewer-box {
  background: var(--navy2);
  border: 1px solid rgba(212, 168, 67, 0.3);
  border-radius: 24px;
  overflow: hidden;
  width: 92%;
  max-width: 1100px;
  height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.7),
    0 0 40px rgba(212, 168, 67, 0.06);
  animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes scaleIn {
  from {
    transform: scale(0.9);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}
.viewer-hdr {
  background: rgba(7, 13, 26, 0.7);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(212, 168, 67, 0.15);
  gap: 1rem;
}
.viewer-title {
  font-family: "Cinzel Decorative", serif;
  font-size: 0.9rem;
  font-weight: 700;
  background: linear-gradient(120deg, var(--gold3), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.close-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(212, 168, 67, 0.3);
  background: rgba(212, 168, 67, 0.1);
  color: var(--gold2);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.close-btn:hover {
  background: rgba(200, 60, 60, 0.3);
  border-color: rgba(200, 60, 60, 0.4);
}
.viewer-body {
  flex: 1;
  background: #fff;
  position: relative;
}
.viewer-body iframe {
  width: 100%;
  height: 100%;
  border: none;
}
.viewer-body .img-wrap {
  width: 100%;
  height: 100%;
  background: #1a2a36;
  display: flex;
  align-items: center;
  justify-content: center;
}
.viewer-body .img-wrap img {
  max-width: 92%;
  max-height: 92%;
  object-fit: contain;
  border-radius: 12px;
}
.viewer-foot {
  background: rgba(7, 13, 26, 0.7);
  padding: 0.5rem 1rem;
  text-align: center;
  font-family: "DM Mono", monospace;
  font-size: 0.65rem;
  color: rgba(212, 168, 67, 0.45);
  border-top: 1px solid rgba(212, 168, 67, 0.1);
  letter-spacing: 0.05em;
}

/* ── PASSWORD MODAL ── */
#modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(4, 10, 22, 0.88);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
  opacity: 0;
  transition: all 0.25s;
}
#modal.active {
  visibility: visible;
  opacity: 1;
}
.modal-box {
  background: var(--navy2);
  border: 1px solid rgba(212, 168, 67, 0.3);
  border-radius: 28px;
  padding: 2.2rem 2rem;
  width: 92%;
  max-width: 360px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 25px 60px rgba(0, 0, 0, 0.6),
    0 0 40px rgba(212, 168, 67, 0.08);
  animation: scaleIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal-box::before {
  content: "";
  position: absolute;
  top: -60%;
  left: -60%;
  width: 220%;
  height: 220%;
  background: conic-gradient(
    from 180deg,
    transparent 60%,
    rgba(212, 168, 67, 0.05) 70%,
    transparent 80%
  );
  animation: rotate-glow 6s linear infinite;
  pointer-events: none;
}
@keyframes rotate-glow {
  to {
    transform: rotate(360deg);
  }
}
.lock-icon {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: rgba(212, 168, 67, 0.12);
  border: 1px solid rgba(212, 168, 67, 0.3);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  box-shadow: 0 0 20px rgba(212, 168, 67, 0.15);
}
.modal-title {
  font-family: "Cinzel Decorative", serif;
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(120deg, var(--gold3), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.35rem;
}
.modal-hint {
  font-size: 0.78rem;
  color: rgba(200, 223, 247, 0.45);
  margin-bottom: 1.4rem;
}
.pwd-input {
  width: 100%;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(212, 168, 67, 0.25);
  border-radius: 40px;
  color: white;
  font-family: "Outfit", sans-serif;
  font-size: 0.95rem;
  outline: none;
  text-align: center;
  letter-spacing: 0.1em;
  transition: border-color 0.2s;
}
.pwd-input::placeholder {
  color: rgba(200, 223, 247, 0.25);
  letter-spacing: 0.02em;
}
.pwd-input:focus {
  border-color: rgba(212, 168, 67, 0.6);
  box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.08);
}
.unlock-btn {
  width: 100%;
  margin-top: 1rem;
  padding: 12px;
  background: linear-gradient(135deg, #c79a30, #f0c55a);
  border: none;
  border-radius: 40px;
  font-family: "Outfit", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: #1a0e00;
  cursor: pointer;
  letter-spacing: 0.04em;
  box-shadow:
    0 4px 14px rgba(212, 168, 67, 0.3),
    0 6px 0 rgba(120, 80, 0, 0.4);
  transition: all 0.2s;
  position: relative;
  top: 0;
}
.unlock-btn:hover {
  top: -2px;
  box-shadow:
    0 6px 20px rgba(212, 168, 67, 0.4),
    0 8px 0 rgba(120, 80, 0, 0.4);
}
.unlock-btn:active {
  top: 3px;
  box-shadow:
    0 2px 8px rgba(212, 168, 67, 0.2),
    0 3px 0 rgba(120, 80, 0, 0.4);
}
.error-msg {
  color: #ff7070;
  font-size: 0.78rem;
  margin-top: 0.7rem;
  min-height: 1.2em;
}

/* ── WHATSAPP BOTTOM NAV ── */
#bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 900;
  background: rgba(7, 13, 26, 0.92);
  backdrop-filter: blur(1px);
  border-top: 1px solid rgba(212, 168, 67, 0.2);
  height: var(--nav-h);
  display: flex;
  align-items: stretch;
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.45);
}
.nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  border: none;
  background: transparent;
  padding: 6px 4px;
  transition: all 0.25s;
  position: relative;
  color: rgba(200, 223, 247, 0.35);
  -webkit-tap-highlight-color: transparent;
}
.nav-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0;
  transition: opacity 0.25s;
  border-radius: 0 0 4px 4px;
}
.nav-btn.active {
  color: var(--gold2);
}
.nav-btn.active::before {
  opacity: 1;
}
.nav-btn:hover {
  color: rgba(212, 168, 67, 0.7);
}
.nav-btn:active .nav-icon-wrap {
  transform: scale(0.88);
}
.nav-icon-wrap {
  width: 42px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 30px;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}
.nav-btn.active .nav-icon-wrap {
  background: rgba(212, 168, 67, 0.15);
  box-shadow: 0 0 12px rgba(212, 168, 67, 0.15);
}
.nav-svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.nav-btn.active .nav-svg {
  stroke: var(--gold2);
}
.nav-label {
  font-family: "DM Mono", monospace;
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  transition: color 0.25s;
}
.nav-badge {
  position: absolute;
  top: -3px;
  right: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold2));
  font-size: 0.55rem;
  font-weight: 700;
  color: #1a0e00;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 6px rgba(212, 168, 67, 0.4);
  font-family: "DM Mono", monospace;
}

/* ── SECTION ICONS ── */
/* Colors per section */
.s1 .nav-icon-wrap {
  background: rgba(100, 180, 255, 0.12) !important;
}
.s2 .nav-icon-wrap {
  background: rgba(120, 220, 160, 0.12) !important;
}
.s3 .nav-icon-wrap {
  background: rgba(255, 180, 80, 0.12) !important;
}
.s4 .nav-icon-wrap {
  background: rgba(220, 120, 200, 0.12) !important;
}
.s5 .nav-icon-wrap {
  background: rgba(80, 200, 230, 0.12) !important;
}
.s6 .nav-icon-wrap {
  background: rgba(255, 120, 100, 0.12) !important;
}
.s7 .nav-icon-wrap {
  background: rgba(123, 100, 255, 0.12) !important;
}
.nav-btn.s1.active .nav-svg {
  stroke: #6ab4ff;
}
.nav-btn.s2.active .nav-svg {
  stroke: #78dca0;
}
.nav-btn.s3.active .nav-svg {
  stroke: #ffb450;
}
.nav-btn.s4.active .nav-svg {
  stroke: #dc78c8;
}
.nav-btn.s5.active .nav-svg {
  stroke: #50c8e6;
}
.nav-btn.s6.active .nav-svg {
  stroke: #ff7864;
}
.nav-btn.s6.active .nav-svg {
  stroke: #b7ff64;
}
.nav-btn.s7.active .nav-svg {
  stroke: #7b63ff;
}
.nav-btn.s1.active .nav-label {
  color: #6ab4ff;
}
.nav-btn.s2.active .nav-label {
  color: #78dca0;
}
.nav-btn.s3.active .nav-label {
  color: #ffb450;
}
.nav-btn.s4.active .nav-label {
  color: #dc78c8;
}
.nav-btn.s5.active .nav-label {
  color: #50c8e6;
}
.nav-btn.s6.active .nav-label {
  color: #ff7864;
}
.nav-btn.s7.active .nav-label {
  color: #8664ff;
}
.nav-btn.s1.active::before {
  background: linear-gradient(90deg, transparent, #6ab4ff, transparent);
}
.nav-btn.s2.active::before {
  background: linear-gradient(90deg, transparent, #78dca0, transparent);
}
.nav-btn.s3.active::before {
  background: linear-gradient(90deg, transparent, #ffb450, transparent);
}
.nav-btn.s4.active::before {
  background: linear-gradient(90deg, transparent, #dc78c8, transparent);
}
.nav-btn.s5.active::before {
  background: linear-gradient(90deg, transparent, #50c8e6, transparent);
}
.nav-btn.s6.active::before {
  background: linear-gradient(90deg, transparent, #ff7864, transparent);
}
.nav-btn.s7.active::before {
  background: linear-gradient(90deg, transparent, #8664ff, transparent);
}

/* ── RIPPLE ── */
@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 0.6;
  }
  100% {
    transform: scale(3);
    opacity: 0;
  }
}
.ripple {
  position: absolute;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(212, 168, 67, 0.3);
  animation: ripple 0.5s ease-out forwards;
  pointer-events: none;
  transform-origin: center;
  margin-left: -15px;
  margin-top: -15px;
}

@media (max-width: 480px) {
  .units-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 0.75rem;
  }
  .nav-label {
    font-size: 0.55rem;
  }
}


.open-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  color: var(--gold);
  background: rgba(212, 168, 67, 0.08);
  border: 1px solid rgba(212, 168, 67, 0.15);
  border-radius: 20px;
  padding: 3px 10px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.open-tag:hover {
  background: rgba(212, 168, 67, 0.2);
  transform: translateY(-1px);
}

.syllabus-info {
  flex: 1;
}



/* Download notification animation */
@keyframes fadeOut {
  0% { opacity: 1; transform: translateX(-50%) scale(1); }
  70% { opacity: 1; transform: translateX(-50%) scale(1); }
  100% { opacity: 0; transform: translateX(-50%) scale(0.9); visibility: hidden; }
}

/* Disabled unit card */
.unit-card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.unit-card.disabled:hover {
  transform: none;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.unit-card.disabled:hover::after {
  opacity: 0;
}


/* Footer Styles */
/* Update the #app padding to make room for footer */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding-bottom: calc(var(--nav-h) + 80px); /* Increased from 20px to 80px */
  display: flex;
  flex-direction: column;
}

/* Footer Styles - Fixed version */
.footer {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 1.2rem;
  margin-top: .2px;
  margin-bottom: calc(var(--nav-h) + 2px); /* Add margin to clear bottom nav */
  font-family: "Outfit", sans-serif;
  font-size: 0.8rem;
  color: rgba(200, 223, 247, 0.6);
  border-top: 1px solid rgba(212, 168, 67, 0.2);
  background: linear-gradient(180deg, rgba(7, 13, 26, 0.8), rgba(7, 13, 26, 0.95));
  backdrop-filter: blur(10px);
  width: 100%;
  clear: both;
}

.footer p {
  margin: 0;
  letter-spacing: 0.03em;
}

.footer p a {
  color: var(--gold2);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer p a:hover {
  color: var(--gold3);
  text-decoration: underline;
}



.download-pdf-btn {
  margin-left: 8px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-family: "DM Mono", monospace;
  font-size: 0.6rem;
  background: rgba(212, 168, 67, 0.2);
  border: 1px solid rgba(212, 168, 67, 0.3);
  border-radius: 20px;
  padding: 2px 7px;
  cursor: pointer;
  transition: 0.2s;
  color: var(--gold2);
}
.download-pdf-btn:hover {
  background: rgba(212, 168, 67, 0.4);
  transform: scale(0.96);
}
.unit-cta-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* ----------------------------------------------------------------------- */

.d1{
    cursor: pointer;
    margin: 10px auto;
    /* border: .01px solid red; */
    border-right: 2.5px double rgb(90, 79, 128);
    border-left: 2.5px double rgb(90, 79, 128);
    width: 99%;
    display: flex;
    overflow-x: auto;
    gap: 10em;
    animation: spinnn 10s infinite linear;
}
.d1::-webkit-scrollbar{
    display: none;
}
.d2{
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10em;
    animation: spin 50s infinite linear;
}

.d3{
    /* flex: 0 0 5em; */
    height: 3em;
    padding: 5px 100px;
    /* background-color: blue; */
    font-size: 1rem;
    border-radius: 24px ;
    text-align: center;
    align-content: center;
    border: none;
    width: max-content;
    background: linear-gradient(180deg, var(--navy), var(--navy2));
    border: #475d8b solid 1px;
     background: linear-gradient(180deg, var(--navy), var(--navy2));
     animation: spinn 10s infinite linear;
    /* animation: spinn 7s infinite linear; */
}
h3{
    font-family: 'Cinzel Decorative', serif;
    font-size: 1.2rem;
    font-weight: 700;
    background: linear-gradient(180deg, var(--gold3), var(--gold2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: spinn 5s infinite linear;
}
@keyframes spin{
    from{translate: 0;}
    to{translate: -100%;}
}
@keyframes spinn{
    0%{background-color: var(--navy3); }
    50%{background-color: var(--gold2);}
    80%{background-color: var(--navy);}
    100%{background-color: var(--gold2);}
}
@keyframes spinnn{
    0%{color: var(--navy3);}
    50%{color: var(--gold3);}
    80%{color: var(--ice);}
    100%{color: var(--glow);}
}

/* Responsive Design */
@media (max-width: 900px) {
  .d1 {
    gap: 10px;
    width: 98%;
    padding: 0 0.5em;
    border-right: 2.5px double rgb(90, 79, 128);
    border-left: 2.5px double rgb(90, 79, 128);
    animation: spinnn 7s infinite linear;
  }
  .d2 {
    gap: 20px;
    animation: spin 20s infinite linear;
  }
  .d3 {
    padding: 5px 30px;
    font-size: 0.95rem;
    min-width: 120px;
    height: 2.5em;
    border: #475d8b solid 1px;
     background: linear-gradient(180deg, var(--navy), var(--navy2));
     animation: spinn 10s infinite linear;
  }
  h3 {
    font-size: 1.05rem;
    padding: 2px 5px;
    animation: spinn 10s infinite linear; 
  }
}

@media (max-width: 600px) {
  .d1 {
    gap: 1px;
    width: 100%;
    /* flex-direction: row; */
    border-right: 2.5px double rgb(90, 79, 128);
    border-left: 2.5px double rgb(90, 79, 128);
    padding: 0 0.2em;
    animation: spinnn 10s infinite linear;
  }
  .d2 {
    
    animation: spin 30s infinite linear;
  }
  .d3 {
    padding: 8px 30px;
    font-size: 0.92rem;
    min-width: 90px;
    height: 2.2em;
    border-radius: 16px;
    border: #475d8b solid 1px;
     background: linear-gradient(180deg, var(--navy), var(--navy2));
     animation: spinn 10s infinite linear;
  }
  h3 {
    font-size: 0.98rem;
    text-align: center;
    padding: 2px 5px;
    animation: spinn 10s infinite linear;
  }
}