/* ============================================================
   Desk-Lock — System Page Styles
   ============================================================ */

/* ---- SYSTEM HERO ---- */
.system-hero {
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}

.system-hero-inner {
  min-height: 60vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  align-items: stretch;
}

.system-hero-content {
  padding: 80px 60px 80px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}

.system-hero-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-highlight);
}

.system-hero-image {
  position: relative;
  min-height: 480px;
}

.system-hero-image .img-placeholder {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  background-color: var(--bg-elevated);
}

/* ---- HOW IT WORKS ---- */
.how-it-works {
  padding: var(--section-pad) 0;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.how-step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--trans-med);
  overflow: hidden;
}

.how-step:nth-child(even) {
  direction: rtl;
}

.how-step:nth-child(even) > * {
  direction: ltr;
}

.how-step-image {
  aspect-ratio: 4 / 3;
  transition: transform var(--trans-slow);
}

.how-step-image.img-placeholder {
  background-color: var(--bg-elevated);
}

.how-step.active .how-step-image {
  transform: scale(1.02);
}

.how-step-content {
  padding: 72px 64px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  justify-content: center;
  background-color: var(--bg-primary);
  transition: background-color var(--trans-med);
}

.how-step.active .how-step-content {
  background-color: var(--bg-elevated);
}

.how-step-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-highlight);
}

.how-step-title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.how-step-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 440px;
}

.how-step-specs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.how-step-spec {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--accent-silver);
}

.how-step-spec::before {
  content: '';
  width: 16px;
  height: 1px;
  background: var(--accent-highlight);
  flex-shrink: 0;
}

/* Lock Mechanism Diagram */
.lock-diagram {
  width: 100%;
  max-width: 400px;
  margin-top: 16px;
}

/* ---- COMPATIBILITY MATRIX ---- */
.compat-section {
  padding: var(--section-pad) 0;
  border-top: 1px solid var(--border-subtle);
}

.compat-header {
  margin-bottom: 48px;
}

.compat-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-dark);
}

.compat-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.compat-table th,
.compat-table td {
  padding: 14px 20px;
  border: 1px solid var(--border-subtle);
  text-align: left;
  white-space: nowrap;
}

.compat-table thead th {
  background-color: var(--bg-elevated);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-silver);
  font-weight: 600;
}

.compat-table tbody tr {
  transition: background-color var(--trans-fast);
}

.compat-table tbody tr:hover {
  background-color: var(--bg-elevated);
}

.compat-table tbody tr.highlighted td {
  background-color: rgba(255, 77, 0, 0.07);
}

.compat-table .check {
  color: var(--accent-highlight);
}

.compat-table .dim {
  color: var(--text-secondary);
}

.compat-product-name {
  color: var(--text-primary);
  font-weight: 600;
}

.compat-dims {
  color: var(--text-secondary);
  font-size: 0.65rem;
}

/* ---- MATERIALS SECTION ---- */
.materials-section {
  padding: var(--section-pad) 0;
  border-top: 1px solid var(--border-subtle);
}

.materials-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.materials-image {
  aspect-ratio: 4 / 3;
}

.materials-image.img-placeholder {
  background-color: var(--bg-elevated);
}

.materials-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.material-spec-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.material-spec-item {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.material-spec-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.material-spec-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-highlight);
  margin-bottom: 6px;
}

.material-spec-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-silver);
  line-height: 1.5;
}

/* ============================================================
   RESPONSIVE — SYSTEM
   ============================================================ */

@media (max-width: 1024px) {
  .system-hero-inner {
    grid-template-columns: 1fr;
  }

  .system-hero-content {
    padding: 60px 0 40px;
  }

  .system-hero-image {
    min-height: 320px;
  }

  .how-step {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .how-step:nth-child(even) {
    direction: ltr;
  }

  .how-step-content {
    padding: 48px 40px;
  }

  .materials-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 768px) {
  .how-step-content {
    padding: 40px 24px;
  }
}