/* =========================================================
   CONVEY CALC
   BULK SOLIDS MATERIALS DATABASE
========================================================= */

/* =========================================================
   PAGE
========================================================= */

.materials-page {
  background: #f8fafc;
  color: #172033;
}

/* =========================================================
   MAIN
========================================================= */

.materials-page .materials-main {
  padding: 58px 0 72px;
}

/* =========================================================
   INTRO
========================================================= */

.materials-page .materials-intro {
  display: grid;

  grid-template-columns:
    minmax(0, 0.85fr)
    minmax(0, 1.15fr);

  gap: 50px;

  align-items: end;

  margin-bottom: 34px;
}

.materials-page .section-kicker {
  display: block;

  margin-bottom: 8px;

  color: #0284c7;

  font-size: 10px;

  font-weight: 900;

  letter-spacing: 1.7px;
}

.materials-page .materials-intro h2 {
  margin: 0;

  color: #172033;

  font-size: 32px;

  line-height: 1.2;

  letter-spacing: -0.5px;
}

.materials-page .materials-intro p {
  margin: 0;

  color: #64748b;

  font-size: 14px;

  line-height: 1.8;
}

/* =========================================================
   TOOLBAR
========================================================= */

.materials-page .materials-toolbar {
  display: grid;

  grid-template-columns:
    minmax(0, 1fr)
    240px;

  gap: 16px;

  padding: 20px;

  background: #ffffff;

  border: 1px solid #e2e8f0;

  border-radius: 12px;

  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);

  margin-bottom: 16px;
}

.materials-page .search-box,
.materials-page .category-filter {
  min-width: 0;
}

.materials-page .materials-toolbar label {
  display: block;

  margin-bottom: 7px;

  color: #334155;

  font-size: 11px;

  font-weight: 800;

  letter-spacing: 0.3px;
}

.materials-page .materials-toolbar input,
.materials-page .materials-toolbar select {
  width: 100%;

  height: 44px;

  padding: 0 13px;

  color: #172033;

  background: #f8fafc;

  border: 1px solid #dbe3ec;

  border-radius: 7px;

  outline: none;

  font: inherit;

  font-size: 13px;

  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
}

.materials-page .materials-toolbar input:focus,
.materials-page .materials-toolbar select:focus {
  background: #ffffff;

  border-color: #28a8ff;

  box-shadow: 0 0 0 3px rgba(40, 168, 255, 0.1);
}

/* =========================================================
   META
========================================================= */

.materials-page .materials-meta {
  display: flex;

  justify-content: space-between;

  align-items: center;

  margin-bottom: 18px;

  color: #94a3b8;

  font-size: 11px;
}

.materials-page .materials-meta span:first-child {
  color: #475569;

  font-weight: 700;
}

/* =========================================================
   MATERIAL GRID
========================================================= */

.materials-page .materials-grid {
  display: grid;

  grid-template-columns: repeat(3, minmax(0, 1fr));

  gap: 18px;
}

/* =========================================================
   MATERIAL CARD
========================================================= */

.materials-page .material-card {
  display: flex;

  flex-direction: column;

  min-width: 0;

  padding: 22px;

  background: #ffffff;

  border: 1px solid #e2e8f0;

  border-radius: 12px;

  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.045);

  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

/* 隐藏筛选后的卡片 */

.materials-page .material-card.hidden {
    display: none !important;
}

[hidden] {
    display: none !important;
}

.materials-page .material-card:hover {
  transform: translateY(-3px);

  border-color: #cbd5e1;

  box-shadow: 0 16px 35px rgba(15, 23, 42, 0.08);
}

/* =========================================================
   CARD TOP
========================================================= */

.materials-page .material-card-top {
  display: flex;

  align-items: center;

  justify-content: space-between;

  gap: 10px;

  margin-bottom: 16px;
}

.materials-page .material-category {
  color: #0284c7;

  font-size: 9px;

  font-weight: 900;

  letter-spacing: 0.8px;

  line-height: 1.4;
}

.materials-page .material-number {
  color: #cbd5e1;

  font-size: 11px;

  font-weight: 800;
}

/* =========================================================
   CARD CONTENT
========================================================= */

.materials-page .material-card h3 {
  margin: 0 0 8px;

  color: #172033;

  font-size: 22px;

  line-height: 1.2;
}

.materials-page .material-description {
  min-height: 66px;

  margin: 0;

  color: #64748b;

  font-size: 12px;

  line-height: 1.7;
}

/* =========================================================
   PROPERTIES
========================================================= */

.materials-page .material-properties {
  display: grid;

  grid-template-columns: repeat(2, minmax(0, 1fr));

  gap: 1px;

  margin-top: 20px;

  background: #e2e8f0;

  border: 1px solid #e2e8f0;

  border-radius: 7px;

  overflow: hidden;
}

.materials-page .material-properties > div {
  min-width: 0;

  padding: 11px;

  background: #f8fafc;
}

.materials-page .material-properties span {
  display: block;

  margin-bottom: 4px;

  color: #94a3b8;

  font-size: 9px;

  line-height: 1.3;
}

.materials-page .material-properties strong {
  display: block;

  color: #334155;

  font-size: 11px;

  line-height: 1.4;
}

/* =========================================================
   CARD FOOTER
========================================================= */

.materials-page .material-footer {
  display: flex;

  align-items: center;

  justify-content: space-between;

  gap: 12px;

  margin-top: auto;

  padding-top: 20px;
}

.materials-page .material-tag {
  display: inline-flex;

  align-items: center;

  padding: 5px 8px;

  color: #475569;

  background: #f1f5f9;

  border-radius: 4px;

  font-size: 9px;

  font-weight: 800;
}

.materials-page .material-footer a {
  color: #0284c7;

  font-size: 10px;

  font-weight: 800;

  white-space: nowrap;

  transition: color 0.2s ease;
}

.materials-page .material-footer a:hover {
  color: #0369a1;
}

/* =========================================================
   EMPTY STATE
========================================================= */

.materials-page .materials-empty {
  padding: 60px 20px;

  text-align: center;

  background: #ffffff;

  border: 1px solid #e2e8f0;

  border-radius: 12px;
}

.materials-page .materials-empty[hidden] {
  display: none;
}

.materials-page .empty-icon {
  width: 42px;
  height: 42px;

  display: grid;

  place-items: center;

  margin: 0 auto 14px;

  color: #64748b;

  background: #f1f5f9;

  border-radius: 50%;

  font-weight: 900;
}

.materials-page .materials-empty h3 {
  margin: 0 0 6px;

  color: #334155;

  font-size: 18px;
}

.materials-page .materials-empty p {
  margin: 0;

  color: #94a3b8;

  font-size: 12px;
}

/* =========================================================
   ENGINEERING NOTE
========================================================= */

.materials-page .materials-note {
  display: flex;

  gap: 14px;

  margin-top: 24px;

  padding: 18px 20px;

  background: #f8fbff;

  border: 1px solid #dbeafe;

  border-left: 4px solid #28a8ff;

  border-radius: 8px;
}

.materials-page .note-mark {
  flex: 0 0 auto;

  width: 23px;
  height: 23px;

  display: grid;

  place-items: center;

  color: #0369a1;

  background: #e0f2fe;

  border-radius: 50%;

  font-size: 12px;

  font-weight: 900;
}

.materials-page .materials-note strong {
  display: block;

  margin-bottom: 4px;

  color: #334155;

  font-size: 11px;

  letter-spacing: 0.5px;

  text-transform: uppercase;
}

.materials-page .materials-note p {
  margin: 0;

  color: #64748b;

  font-size: 11px;

  line-height: 1.7;
}

/* =========================================================
   RESPONSIVE
========================================================= */

@media (max-width: 1000px) {
  .materials-page .materials-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .materials-page .materials-intro {
    grid-template-columns: 1fr;

    gap: 16px;

    align-items: start;
  }

  .materials-page .materials-toolbar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  
  .materials-page .materials-main {
    padding: 42px 0 55px;
  }

  .materials-page .materials-grid {
    grid-template-columns: 1fr;
  }

  .materials-page .materials-meta {
    align-items: flex-start;

    flex-direction: column;

    gap: 5px;
  }

  .materials-page .material-description {
    min-height: auto;
  }
}