/* ============================================
   nslabs — Our Philosophy
   Interactive manifesto / decision-OS panel
   ============================================ */

:root {
  --bg-deep: #07090f;
  --bg-panel: #0d1324;
  --bg-elevated: #121a30;
  --accent: #4f7df5;
  --accent-2: #8b5cf6;
  --text-primary: #e8ecf6;
  --text-secondary: #8a93ad;
  --text-dim: #5b6480;
  --border: rgba(140, 160, 220, 0.10);
  --border-strong: rgba(140, 160, 220, 0.18);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-glow: 0 0 0 1px rgba(79, 125, 245, 0.35), 0 8px 28px rgba(79, 125, 245, 0.25);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   SECTION
   ============================================ */
.ns-philosophy {
  position: relative;
  padding: 140px 24px;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(900px 500px at 80% 0%, rgba(139, 92, 246, 0.10), transparent 60%),
    radial-gradient(900px 500px at 0% 100%, rgba(79, 125, 245, 0.10), transparent 60%),
    linear-gradient(180deg, #0a0e1a 0%, #07090f 100%);
}

.ns-philosophy::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(140, 160, 220, 0.10) 1px, transparent 0);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, #000 30%, transparent 80%);
  pointer-events: none;
  opacity: 0.6;
}

.ns-container {
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* ============================================
   ASYMMETRIC HEADER
   ============================================ */
.ns-philosophy-header {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: end;
  gap: 40px;
  margin-bottom: 80px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.ns-philosophy-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "SF Mono", "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--accent);
  padding: 10px 16px;
  border: 1px solid rgba(79, 125, 245, 0.3);
  border-radius: 100px;
  background: rgba(79, 125, 245, 0.08);
  white-space: nowrap;
  align-self: start;
}

.ns-philosophy-label::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: phPulse 1.6s ease-in-out infinite;
}

@keyframes phPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.ns-philosophy-title {
  margin: 0;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  max-width: 880px;
  justify-self: end;
  text-align: right;
}

/* ============================================
   MAIN — Principles + Insight viewport
   ============================================ */
.ns-philosophy-main {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 36px;
  align-items: start;
}

/* ============================================
   PRINCIPLES STACK (left)
   ============================================ */
.principles-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
}

.principles-grid::before {
  content: "PRINCIPLE.STACK — 05";
  display: block;
  font-family: "SF Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--text-dim);
  margin-bottom: 8px;
  padding-left: 4px;
}

.principle-card {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr 18px;
  gap: 20px;
  align-items: start;
  padding: 22px 24px;
  background: linear-gradient(180deg, rgba(13, 19, 36, 0.5), rgba(7, 9, 15, 0.5));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.principle-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.principle-card::after {
  content: "→";
  position: absolute;
  right: 22px;
  top: 26px;
  font-size: 14px;
  color: var(--text-dim);
  transition: transform 0.4s, color 0.3s, opacity 0.3s;
  opacity: 0;
}

.principle-card:hover,
.principle-card.is-active {
  background: linear-gradient(180deg, rgba(18, 26, 48, 0.8), rgba(13, 19, 36, 0.6));
  border-color: rgba(79, 125, 245, 0.35);
  transform: translateX(4px);
}

.principle-card:hover::before,
.principle-card.is-active::before { transform: scaleY(1); }

.principle-card:hover::after,
.principle-card.is-active::after {
  opacity: 1;
  color: var(--accent);
  transform: translateX(4px);
}

.principle-number {
  font-family: "SF Mono", monospace;
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--text-dim);
  letter-spacing: -0.02em;
  -webkit-text-stroke: 1px rgba(140, 160, 220, 0.25);
  -webkit-text-fill-color: transparent;
  transition: -webkit-text-fill-color 0.3s, -webkit-text-stroke-color 0.3s;
  line-height: 1.1;
  padding-top: 2px;
}

.principle-card:hover .principle-number,
.principle-card.is-active .principle-number {
  -webkit-text-fill-color: var(--accent);
  -webkit-text-stroke-color: transparent;
}

.principle-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.principle-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* hide the redundant arrow column visually */
.principle-card > :nth-child(3) { display: none; }

/* ============================================
   INSIGHT VIEWPORT (right)
   ============================================ */
.ns-philosophy-insight {
  position: sticky;
  top: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.insight-box {
  position: relative;
  padding: 36px 32px;
  background: linear-gradient(135deg, rgba(79, 125, 245, 0.12), rgba(139, 92, 246, 0.06));
  border: 1px solid rgba(79, 125, 245, 0.3);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(20px);
}

.insight-box::before {
  content: "DECISION.OS";
  position: absolute;
  top: -10px; left: 24px;
  font-family: "SF Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--accent);
  background: var(--bg-deep);
  padding: 2px 10px;
}

.insight-box::after {
  content: "";
  position: absolute;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 125, 245, 0.25), transparent 70%);
  top: -120px; right: -120px;
  filter: blur(60px);
  pointer-events: none;
  animation: phBreath 6s ease-in-out infinite;
}

@keyframes phBreath {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

.insight-text {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-primary);
  font-weight: 500;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.insight-text::before {
  content: "“";
  display: block;
  font-size: 3rem;
  line-height: 0.6;
  color: var(--accent);
  font-family: Georgia, serif;
  margin-bottom: 12px;
  opacity: 0.6;
}

/* Active principle live readout */
.insight-active {
  padding: 24px 28px;
  background: rgba(7, 9, 15, 0.6);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.insight-active-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: "SF Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.25em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.insight-active-head .live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #4ade80;
}

.insight-active-head .live::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 10px #4ade80;
  animation: phPulse 1.4s ease-in-out infinite;
}

.insight-active-title {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity 0.3s;
}

.insight-active-body {
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--text-secondary);
  transition: opacity 0.3s;
}

/* Closing block */
.ns-philosophy-closing {
  padding: 28px 28px;
  background: linear-gradient(180deg, rgba(18, 26, 48, 0.5), rgba(13, 19, 36, 0.5));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--text-secondary);
  position: relative;
}

.ns-philosophy-closing::before {
  content: "";
  position: absolute;
  left: 18px;
  top: -1px;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.ns-philosophy-closing .highlight {
  display: block;
  margin-top: 8px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1000px) {
  .ns-philosophy { padding: 100px 20px; }
  .ns-philosophy-main { grid-template-columns: 1fr; gap: 36px; }
  .ns-philosophy-insight { position: static; }
  .ns-philosophy-header {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .ns-philosophy-title { text-align: left; justify-self: start; }
}

@media (max-width: 560px) {
  .ns-philosophy { padding: 80px 18px; }
  .principle-card { grid-template-columns: 44px 1fr; padding: 18px 18px; gap: 14px; }
  .principle-card::after { display: none; }
  .principle-number { font-size: 1.2rem; }
  .principle-card h3 { font-size: 1rem; }
  .principle-card p { font-size: 0.88rem; }
  .insight-box { padding: 28px 22px; }
  .insight-text { font-size: 1.02rem; }
  .ns-philosophy-closing { padding: 22px; font-size: 0.95rem; }
}