/* ── Buttons ───────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 9px;
  font-family: var(--font-ko);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(135deg, #00d4a8, #00ffcc);
  color: #020408;
  box-shadow: 0 4px 24px rgba(0,255,204,0.28);
}
.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 36px rgba(0,255,204,0.45);
}
.btn--primary:hover::before { opacity: 1; }

.btn--ghost {
  background: transparent;
  border: 1px solid var(--border-cyan);
  color: var(--cyan);
}
.btn--ghost:hover {
  background: var(--cyan-dark);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}
.btn--large { padding: 18px 44px; font-size: 1.05rem; }

/* ── Tags ──────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.tag--cyan {
  background: rgba(0,255,204,0.1);
  color: var(--cyan);
  border: 1px solid rgba(0,255,204,0.25);
}
.tag--purple {
  background: rgba(123,47,255,0.12);
  color: var(--purple-bright);
  border: 1px solid rgba(123,47,255,0.3);
}
.tag--green {
  background: rgba(0,255,65,0.08);
  color: var(--green);
  border: 1px solid rgba(0,255,65,0.22);
}

/* ── Terminal ──────────────────────────────────── */
.terminal {
  background: #000d1a;
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--glow-cyan);
}
.terminal__bar {
  background: #0a1825;
  padding: 11px 16px;
  display: flex;
  align-items: center;
  gap: 7px;
  border-bottom: 1px solid var(--border-cyan);
}
.terminal__dot {
  width: 11px; height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}
.terminal__dot--red    { background: #ff5f57; }
.terminal__dot--yellow { background: #febc2e; }
.terminal__dot--green  { background: #28c840; }
.terminal__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-left: 6px;
}
.terminal__body {
  padding: 20px 20px 24px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.9;
  min-height: 200px;
}
.terminal__line { display: block; }
.terminal__line--cmd  { color: var(--cyan); }
.terminal__line--ok   { color: var(--green); }
.terminal__line--info { color: var(--text-muted); }
.terminal__cursor {
  display: inline-block;
  width: 8px; height: 1em;
  background: var(--cyan);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

/* ── Product Cards ─────────────────────────────── */
.product-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius);
  padding: 28px;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--card-accent, var(--cyan));
  box-shadow: 0 0 24px color-mix(in srgb, var(--card-accent, var(--cyan)) 40%, transparent),
              0 0 64px color-mix(in srgb, var(--card-accent, var(--cyan)) 15%, transparent);
}

/* Accent color per product */
.product-card[data-product="groupware"]  { --card-accent: var(--cyan); }
.product-card[data-product="messenger"] { --card-accent: var(--yellow); }
.product-card[data-product="itmanager"] { --card-accent: var(--purple-bright); }
.product-card[data-product="essence"]   { --card-accent: var(--cyan-dim); }
.product-card[data-product="essenceon"] { --card-accent: var(--green); }
.product-card[data-product="esecurity"] { --card-accent: #ff3366; }

.product-card__glow {
  position: absolute;
  width: 220px; height: 220px;
  border-radius: 50%;
  top: -70px; right: -70px;
  pointer-events: none;
  background: radial-gradient(circle, color-mix(in srgb, var(--card-accent, var(--cyan)) 14%, transparent) 0%, transparent 70%);
  transition: opacity var(--transition);
}

.product-card--featured {
  grid-column: span 2;
  border-color: rgba(0,255,204,0.3);
}
.product-card--featured .product-card__glow {
  width: 300px; height: 300px;
  top: -100px; right: -80px;
}

.product-card__header {
  display: flex;
  align-items: center;
  gap: 16px;
}
.product-card__icon-wrap {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--card-accent, var(--cyan)) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--card-accent, var(--cyan)) 30%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.product-card__meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.product-card__tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--card-accent, var(--cyan));
  opacity: 0.8;
}
.product-card__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.3;
}
.product-card--featured .product-card__name {
  font-size: 1.25rem;
}
.product-card__desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.product-card__features {
  display: flex;
  flex-direction: column;
  gap: 9px;
  flex: 1;
}
.product-card__features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.feature-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--card-accent, var(--cyan));
  flex-shrink: 0;
  box-shadow: 0 0 6px var(--card-accent, var(--cyan));
}
.product-card__footer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.06);
  flex-wrap: wrap;
}
.product-card__badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 20px;
  background: color-mix(in srgb, var(--card-accent, var(--cyan)) 10%, transparent);
  color: var(--card-accent, var(--cyan));
  border: 1px solid color-mix(in srgb, var(--card-accent, var(--cyan)) 25%, transparent);
}
.product-card__badge--ai {
  display: flex;
  align-items: center;
  gap: 6px;
}
.ai-pulse {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: aiPulse 1.8s ease-in-out infinite;
}

/* ── Reveal (scroll animation) ─────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal--delay-1 { transition-delay: 0.12s; }
.reveal--delay-2 { transition-delay: 0.24s; }
.reveal--delay-3 { transition-delay: 0.36s; }

/* ── Product Showcase ───────────────────────────── */
.showcase__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 28px;
}

.showcase__tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 8px;
  border: 1px solid rgba(0,255,204,0.25);
  background: rgba(8,14,26,0.6);
  color: var(--text-dim);
  font-family: var(--font-ko);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.25s, color 0.25s, box-shadow 0.25s, background 0.25s;
  position: relative;
}
.showcase__tab-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(0,255,204,0.35);
  flex-shrink: 0;
  transition: background 0.25s, box-shadow 0.25s;
}
.showcase__tab:hover {
  border-color: rgba(0,255,204,0.5);
  color: var(--text-primary);
}
.showcase__tab--active {
  border-color: var(--tab-accent, var(--cyan));
  color: var(--tab-accent, var(--cyan));
  background: rgba(0,255,204,0.06);
  box-shadow: 0 0 14px rgba(0,255,204,0.18);
}
.showcase__tab--active .showcase__tab-dot {
  background: var(--tab-accent, var(--cyan));
  box-shadow: 0 0 6px var(--tab-accent, var(--cyan));
}

/* per-product accent colours */
.showcase__tab[data-product="groupware"] { --tab-accent: var(--cyan); }
.showcase__tab[data-product="messenger"] { --tab-accent: var(--yellow); }
.showcase__tab[data-product="itmanager"] { --tab-accent: #a855f7; }
.showcase__tab[data-product="essence"]   { --tab-accent: var(--cyan); }
.showcase__tab[data-product="essenceon"] { --tab-accent: var(--green); }
.showcase__tab[data-product="esecurity"] { --tab-accent: #ff3366; }

/* ── Browser Frame ──────────────────────────────── */
.browser-frame {
  max-width: 1100px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(0,255,204,0.3);
  box-shadow: 0 0 40px rgba(0,255,204,0.12), 0 24px 60px rgba(0,0,0,0.6);
  transition: border-color 0.4s, box-shadow 0.4s;
}
.browser-frame[data-active="messenger"] {
  border-color: rgba(255,215,64,0.4);
  box-shadow: 0 0 40px rgba(255,215,64,0.15), 0 24px 60px rgba(0,0,0,0.6);
}
.browser-frame[data-active="itmanager"] {
  border-color: rgba(168,85,247,0.4);
  box-shadow: 0 0 40px rgba(168,85,247,0.15), 0 24px 60px rgba(0,0,0,0.6);
}
.browser-frame[data-active="essenceon"] {
  border-color: rgba(0,255,65,0.4);
  box-shadow: 0 0 40px rgba(0,255,65,0.15), 0 24px 60px rgba(0,0,0,0.6);
}
.browser-frame[data-active="esecurity"] {
  border-color: rgba(255,51,102,0.4);
  box-shadow: 0 0 40px rgba(255,51,102,0.15), 0 24px 60px rgba(0,0,0,0.6);
}

.browser-frame__bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: #0d1a2a;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.browser-frame__dots { display: flex; gap: 6px; }
.browser-frame__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.browser-frame__dot--red    { background: #ff5f57; }
.browser-frame__dot--yellow { background: #febc2e; }
.browser-frame__dot--green  { background: #28c840; }

.browser-frame__url {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 6px;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  overflow: hidden;
  white-space: nowrap;
}
.browser-frame__url-lock { font-size: 0.7rem; }
.browser-frame__url-protocol { color: rgba(0,255,204,0.5); }
.browser-frame__url-host { color: var(--text-secondary); }
.browser-frame__actions { width: 60px; }

.browser-frame__viewport {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
}
.browser-frame__shot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #020408;
  opacity: 0;
  transition: opacity 0.45s ease;
}
.browser-frame__shot--active { opacity: 1; }

.browser-frame__scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.08) 3px,
    rgba(0,0,0,0.08) 4px
  );
  z-index: 2;
}

.browser-frame__shimmer {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(0,255,204,0.18) 50%,
    transparent 60%
  );
  background-size: 200% 100%;
  background-position: -100% 0;
  pointer-events: none;
  z-index: 3;
  opacity: 0;
}
.browser-frame__shimmer--flash {
  animation: shimmerSlide 0.55s ease forwards;
}

/* ── Showcase caption ───────────────────────────── */
.showcase__caption {
  text-align: center;
  margin-top: 18px;
  font-size: 0.9rem;
  color: var(--text-dim);
  font-family: var(--font-ko);
  min-height: 1.4em;
  transition: opacity 0.3s;
}

@media (max-width: 640px) {
  .showcase__tab { padding: 8px 14px; font-size: 0.8rem; }
  .browser-frame__bar { padding: 8px 12px; }
  .browser-frame__actions { display: none; }
  .product-card--featured { grid-column: span 1; }
}