/* ===========================
   TIPSSE – mbse.css
   MBSE page specific styles
   =========================== */

/* ── Active nav link ── */
.nav-active {
  color: var(--accent) !important;
}
.nav-active::after {
  transform: scaleX(1) !important;
}

/* ═══════════════════════════
   MBSE HERO
   ═══════════════════════════ */
.mbse-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
  padding: 100px 0 60px;
}
.mbse-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.mbse-hero-text .section-tag { margin-bottom: 20px; }
.mbse-hero-text h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  background: linear-gradient(135deg, #fff 0%, #a8c4f0 50%, #7b5ef6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}
.mbse-hero-text p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 500px;
}
.mbse-hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Mock BDD diagram in hero */
.mbse-hero-diagram {
  display: flex;
  justify-content: center;
  align-items: center;
}
.mock-diagram {
  position: relative;
  width: 320px;
  height: 260px;
}
.mock-node {
  position: absolute;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  border: 1.5px solid;
  min-width: 100px;
  text-align: center;
  animation: nodeFloat 4s ease-in-out infinite;
}
.mock-node span {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  margin-bottom: 3px;
  opacity: 0.7;
}
.mock-node.block {
  background: rgba(79,142,247,0.1);
  border-color: rgba(79,142,247,0.5);
  color: #a8c4f0;
}
.mock-node.req {
  background: rgba(123,94,246,0.1);
  border-color: rgba(123,94,246,0.5);
  color: #c4b5fd;
}
.n1 { top: 20px; left: 100px;  animation-delay: 0s; }
.n2 { top: 100px; left: 20px;  animation-delay: 0.5s; }
.n3 { top: 100px; left: 190px; animation-delay: 1s; }
.n4 { top: 185px; left: 10px;  animation-delay: 1.5s; }
.n5 { top: 185px; left: 185px; animation-delay: 2s; }

.mock-edges {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

@keyframes nodeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* ═══════════════════════════
   WHAT IS MBSE
   ═══════════════════════════ */
.mbse-def-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}
.mbse-def-main {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.mbse-def-main h3 { color: var(--text); margin-bottom: 24px; }

.compare-table {
  display: flex;
  gap: 16px;
  align-items: stretch;
}
.compare-col {
  flex: 1;
  padding: 16px;
  border-radius: 10px;
  background: var(--surface-2);
}
.compare-col.old { border: 1px solid rgba(255,255,255,0.06); }
.compare-col.new { border: 1px solid rgba(79,142,247,0.2); }
.compare-header {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.compare-header.accent { color: var(--accent); }
.compare-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.compare-col li { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.compare-divider {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  color: var(--accent);
  flex-shrink: 0;
  padding-top: 32px;
}

.mbse-concepts {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.concept-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: var(--transition);
}
.concept-card:hover { border-color: rgba(79,142,247,0.3); transform: translateX(4px); }
.concept-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.concept-card h4 { color: var(--text); font-size: 0.95rem; margin-bottom: 6px; }
.concept-card p { font-size: 0.85rem; line-height: 1.6; }

/* Why MBSE */
.mbse-why {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}
.why-text h3 { color: var(--text); margin-bottom: 14px; font-size: 1.3rem; }
.why-text p { margin-bottom: 12px; font-size: 0.95rem; }

.why-stack { min-width: 200px; }
.stack-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.stack-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.stack-items span {
  padding: 6px 14px;
  background: rgba(79,142,247,0.08);
  border: 1px solid rgba(79,142,247,0.2);
  border-radius: 8px;
  font-size: 0.82rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  text-align: center;
}

/* ═══════════════════════════
   FEATURES
   ═══════════════════════════ */
#features { background: var(--bg-3) !important; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}
.feature-card:hover { border-color: rgba(79,142,247,0.3); transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-card.highlight {
  grid-column: span 2;
  border-color: rgba(79,142,247,0.2);
  background: linear-gradient(135deg, rgba(79,142,247,0.06) 0%, var(--surface) 60%);
}
.feature-icon { font-size: 1.8rem; margin-bottom: 12px; }
.feature-card h3 { color: var(--text); font-size: 1rem; margin-bottom: 10px; }
.feature-card p  { font-size: 0.85rem; line-height: 1.65; }
.feature-list {
  list-style: none;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.feature-list li {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-left: 14px;
  position: relative;
}
.feature-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.7rem;
  top: 1px;
}

/* ═══════════════════════════
   TOOL LAUNCH
   ═══════════════════════════ */
#tool { background: var(--bg) !important; }

.tool-launch-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* Mock editor preview */
.tool-preview { flex: 1; }
.mock-editor {
  background: #0a0d16;
  border-right: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  height: 340px;
  display: flex;
  flex-direction: column;
}
.mock-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: #0d1120;
  border-bottom: 1px solid var(--border);
  gap: 8px;
  flex-shrink: 0;
}
.mock-toolbar-left, .mock-toolbar-right { display: flex; align-items: center; gap: 6px; }
.mock-btn {
  padding: 3px 9px;
  border-radius: 5px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  white-space: nowrap;
}
.mock-btn.active { background: rgba(79,142,247,0.15); border-color: var(--accent); color: var(--accent); }
.mock-sep { width: 1px; height: 16px; background: var(--border); margin: 0 2px; }
.mock-tab {
  padding: 3px 10px;
  border-radius: 5px 5px 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
  color: var(--text-muted);
  font-size: 0.7rem;
  white-space: nowrap;
}
.mock-tab.active { background: var(--surface); color: var(--text); }
.mock-tab.add { color: var(--text-dim); }

.mock-body {
  display: grid;
  grid-template-columns: 120px 1fr 140px;
  flex: 1;
  overflow: hidden;
}
.mock-palette {
  background: #0b0e1a;
  border-right: 1px solid var(--border);
  padding: 10px 8px;
  overflow: hidden;
}
.mock-palette-title {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 8px;
  padding: 0 4px;
}
.mock-palette-title.mt { margin-top: 12px; }
.mock-palette-item {
  padding: 5px 8px;
  border-radius: 5px;
  margin-bottom: 4px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.68rem;
  cursor: grab;
}
.block-item { border-color: rgba(79,142,247,0.3); color: #a8c4f0; }
.req-item   { border-color: rgba(123,94,246,0.3); color: #c4b5fd; }
.actor-item { border-color: rgba(52,211,153,0.3); color: #6ee7b7; }
.vt-item    { border-color: rgba(251,191,36,0.3);  color: #fcd34d; }

.mock-canvas {
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 50%, rgba(79,142,247,0.03) 0%, transparent 70%);
}
.mock-canvas-node {
  position: absolute;
  border-radius: 7px;
  padding: 6px 12px;
  border: 1.5px solid;
  font-size: 0.68rem;
}
.block-n { background: rgba(79,142,247,0.08); border-color: rgba(79,142,247,0.4); color: #a8c4f0; }
.req-n   { background: rgba(123,94,246,0.08);  border-color: rgba(123,94,246,0.4); color: #c4b5fd; }
.cn1 { top: 28px; left: 110px; }
.cn2 { top: 110px; left: 60px; }
.cn3 { top: 190px; left: 60px; }
.cn-stereo { font-size: 0.58rem; opacity: 0.6; margin-bottom: 2px; }
.cn-name   { font-weight: 600; }
.cn-sub    { font-size: 0.6rem; opacity: 0.6; margin-top: 2px; }
.canvas-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

.mock-props {
  background: #0b0e1a;
  border-left: 1px solid var(--border);
  padding: 10px 10px;
}
.mock-props-title {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.mock-prop-row {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  font-size: 0.65rem;
  padding: 5px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--text-dim);
}
.mock-prop-row .pv { color: var(--text-muted); text-align: right; max-width: 80px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mock-prop-row .pv.accent { color: var(--accent); }
.mock-prop-row .pv.dim { color: var(--text-dim); }

/* Tool info panel */
.tool-launch-info {
  padding: 40px 40px 40px 0;
  min-width: 280px;
  max-width: 320px;
}
.tool-launch-info h3 { color: var(--text); margin-bottom: 12px; font-size: 1.2rem; }
.tool-launch-info > p { font-size: 0.9rem; margin-bottom: 20px; }

.launch-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.badge {
  padding: 4px 10px;
  border-radius: 99px;
  background: rgba(79,142,247,0.1);
  border: 1px solid rgba(79,142,247,0.25);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 600;
}
.launch-actions { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.launch-actions .btn { justify-content: center; }

.launch-note {
  font-size: 0.78rem;
  color: var(--text-dim) !important;
  line-height: 1.8;
}
.launch-note code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* ═══════════════════════════
   GETTING STARTED
   ═══════════════════════════ */
#getting-started { background: var(--bg-2) !important; }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}
.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.step-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}
.step-card:hover::before { transform: scaleX(1); }
.step-card:hover { transform: translateY(-4px); }
.step-num {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}
.step-card h4 { color: var(--text); margin-bottom: 10px; }
.step-card p  { font-size: 0.88rem; line-height: 1.7; }

/* ═══════════════════════════
   RESPONSIVE
   ═══════════════════════════ */
@media (max-width: 1100px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card.highlight { grid-column: span 2; }
  .tool-launch-card { grid-template-columns: 1fr; }
  .tool-launch-info { padding: 32px; max-width: 100%; }
}
@media (max-width: 900px) {
  .mbse-hero-inner   { grid-template-columns: 1fr; }
  .mbse-hero-diagram { display: none; }
  .mbse-def-grid     { grid-template-columns: 1fr; }
  .mbse-why          { grid-template-columns: 1fr; gap: 24px; }
  .why-stack         { min-width: auto; }
  .stack-items       { flex-direction: row; flex-wrap: wrap; justify-content: center; }
}
@media (max-width: 700px) {
  .features-grid { grid-template-columns: 1fr; }
  .feature-card.highlight { grid-column: span 1; }
  .steps-grid { grid-template-columns: 1fr; }
  .compare-table { flex-direction: column; }
  .compare-divider { display: none; }
  .mock-editor { height: 260px; }
  .mock-body { grid-template-columns: 90px 1fr; }
  .mock-props { display: none; }
}