html, body {
  width: 100%; height: 100%;
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

/* Canvas background */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
}

/* Images Modals */
.image-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.85);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: .3s;
  z-index: 9999;
}

.image-modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-image {
  max-width: 90%;
  max-height: 90%;
  border-radius: 12px;
  transform: scale(.9);
  transition: .3s;
}

.image-modal.show .modal-image {
  transform: scale(1);
}

.close-modal {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 42px;
  color: white;
  cursor: pointer;
}

/* ── Navbar */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-xl);
  z-index: var(--z-nav);
  background: var(--main-color);
  backdrop-filter: blur(20px);
  border-bottom: none;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.15);
  transition: transform var(--dur-mid) var(--ease-out);
}
body.loading #navbar { transform: translateY(-100%); }

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.nav-logo-bracket { color: var(--clr-accent2); }
.nav-logo-text    { color: #ffffff; padding: 0 2px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-xl);
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.8);
  position: relative;
  transition: color var(--dur-fast) ease;
}
.nav-link::after {
  content: attr(data-key);
  position: absolute;
  top: -18px; left: 50%;
  transform: translateX(-50%);
  font-size: 0.6rem;
  color: var(--clr-accent2);
  opacity: 0;
  transition: opacity var(--dur-fast) ease;
}
.nav-link:hover { color: #ffffff; }
.nav-link:hover::after,
.nav-link.active::after { opacity: 1; }
.nav-link.active { color: #ffffff; font-weight: 700; }

.nav-status {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(255,255,255,0.8);
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--clr-accent2);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

/* ── Main & Sections */
#main {
  position: relative;
  z-index: var(--z-sections);
  min-height: 100vh;
}

.section {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px var(--sp-xl) var(--sp-xl);
  pointer-events: none;
  opacity: 0;
  z-index: var(--z-sections);
  overflow-y: auto;
}
.section.active {
  pointer-events: all;
  opacity: 1;
}

.section-content {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color:var(--main-color);
  margin-bottom: var(--sp-md);
  text-transform: uppercase;
  font-weight: 600;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.05;
  color: var(--clr-text);
  margin-bottom: var(--sp-xl);
}

.section-title-sub {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 800;
  line-height: 1.05;
  color: var(--clr-text);
  margin-bottom: var(--sp-xl);
}

.section-title .accent {
  color:var(--main-color);
}

/* ── Buttons  */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: 14px 28px;
  background:var(--main-color);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--r-sm);
  transition: all var(--dur-fast) var(--ease-out);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}
.btn-primary:hover {
  background: #7c3aed;
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(139, 92, 246, 0.4);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: 14px 28px;
  background: transparent;
  color:var(--main-color);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  border: 2px solid var(--main-color);
  border-radius: var(--r-sm);
  transition: all var(--dur-fast) var(--ease-out);
  cursor: pointer;
}
.btn-ghost:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: var(--main-color);
  color: var(--main-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.2);
}

.btn-arrow { font-size: 1.1em; transition: transform var(--dur-fast) ease; }
.btn-primary:hover .btn-arrow,
.btn-ghost:hover .btn-arrow { transform: translateX(4px); }

/* ── Keyboard Hint */
#kb-hint {
  position: fixed;
  bottom: 56px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: 8px 16px;
  background: rgba(13,17,23,0.9);
  border: 1px solid var(--clr-border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--clr-text2);
  z-index: var(--z-nav);
  opacity: 0;
  backdrop-filter: blur(10px);
  transition: opacity var(--dur-mid) ease, transform var(--dur-mid) ease;
  white-space: nowrap;
}
#kb-hint.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
#kb-hint kbd {
  display: inline-block;
  padding: 1px 5px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-hi);
  border-radius: 3px;
  font-size: 0.68rem;
  color: var(--clr-accent);
}

/* ── Footer */
#footer {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-xl);
  z-index: var(--z-nav);
  background: #ffffff;
  border-top: 1px solid rgba(139, 92, 246, 0.15);
  backdrop-filter: blur(20px);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--clr-text3);
  box-shadow: 0 -4px 20px rgba(139, 92, 246, 0.05);
}
.footer-kb-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--main-color);
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all var(--dur-fast) ease;
  padding: 4px 8px;
}
.footer-kb-btn:hover {
  background: rgba(139, 92, 246, 0.1);
  border-radius: 4px;
}

/* ── Tags */
.tag {
  display: inline-block;
  padding: 6px 12px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--main-color);
  transition: all var(--dur-fast) ease;
}
.tag:hover {
  border-color:var(--main-color);
  background: rgba(139, 92, 246, 0.2);
  color:var(--main-color);
  transform: translateY(-2px);
}