/**
 * Nav Item Component Standard
 * Standardized navigation item styling for DiamondX platforms
 *
 * Usage:
 * - Home/Diamond: <a class="nav-item" href="..."><span class="nav-item-icon">💎</span><span class="nav-item-text">Home</span></a>
 * - Trade: <a class="nav-item trade" href="..."><span class="nav-item-icon">💹</span><span class="nav-item-text">Trade</span></a>
 * - Stream: <a class="nav-item stream" href="..."><span class="nav-item-icon">📺</span><span class="nav-item-text">Stream</span></a>
 * - Chart/Library: <a class="nav-item chart" href="..."><span class="nav-item-icon">📈</span><span class="nav-item-text">Library</span></a>
 */

/* ===== Base Nav Item ===== */
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 2px;
  border-radius: 10px;
  text-decoration: none;
  color: #a1a1aa;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  background: linear-gradient(180deg, var(--panel-top), var(--panel-bot));
  border: 1px solid var(--line);
  box-shadow: 0 2px 4px rgba(0, 0, 0, .1);
  aspect-ratio: 1;
  min-width: 0;
  max-width: 100px;
  max-height: 100px;
  width: 100%;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(16, 185, 129, .1) 0%, rgba(31, 221, 253, .1) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.nav-item > * {
  position: relative;
  z-index: 1;
}

.nav-item-text {
  transition: opacity 0.2s ease, width 0.2s ease;
  opacity: 1;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 11px;
  font-weight: 500;
  text-align: center;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.nav-item-icon {
  font-size: 24px;
  width: auto;
  text-align: center;
  flex-shrink: 0;
  line-height: 1;
}

/* ===== Hover States ===== */
.nav-item:hover {
  background: rgba(255, 255, 255, .1);
  color: #ffffff;
  border-color: rgba(255, 255, 255, .15);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .2);
}

.nav-item:hover::before {
  opacity: 1;
}

/* ===== Active State ===== */
.nav-item.active {
  background: linear-gradient(180deg, var(--panel-top), var(--panel-bot));
  color: #ffffff;
  border-color: rgba(255, 255, 255, .15);
  box-shadow:
    0 4px 12px rgba(0, 0, 0, .2),
    0 0 0 1px rgba(255, 255, 255, .1);
}

.nav-item.active::before {
  opacity: 0;
}

/* ===== Trade Nav Item (Green) ===== */
.nav-item.trade {
  color: #10b981;
  background: linear-gradient(180deg, rgba(16, 185, 129, .12), rgba(16, 185, 129, .06));
  border-color: rgba(16, 185, 129, .25);
}

.nav-item.trade:hover {
  background: linear-gradient(180deg, rgba(16, 185, 129, .18), rgba(16, 185, 129, .1));
  border-color: rgba(16, 185, 129, .35);
  color: #10b981;
}

/* ===== Stream Nav Item (Gold/Yellow) ===== */
.nav-item.stream {
  color: #f4b73e;
  background: linear-gradient(180deg, rgba(244, 183, 62, .18), rgba(244, 183, 62, .1));
  border-color: rgba(244, 183, 62, .35);
}

.nav-item.stream:hover {
  background: linear-gradient(180deg, rgba(244, 183, 62, .22), rgba(244, 183, 62, .12));
  border-color: rgba(244, 183, 62, .4);
  color: #f4b73e;
}

/* ===== Chart/Library Nav Item (Blue) ===== */
.nav-item.chart {
  color: #3b82f6;
  background: linear-gradient(180deg, rgba(59, 130, 246, .12), rgba(59, 130, 246, .06));
  border-color: rgba(59, 130, 246, .25);
}

.nav-item.chart:hover {
  background: linear-gradient(180deg, rgba(59, 130, 246, .18), rgba(59, 130, 246, .1));
  border-color: rgba(59, 130, 246, .35);
  color: #3b82f6;
}

/* ===== Light Mode ===== */
html.light .nav-item {
  color: #52525b;
  background: linear-gradient(180deg, #f8f9fa, #fafafa);
  border-color: rgba(0, 0, 0, .08);
}

html.light .nav-item:hover {
  background: rgba(0, 0, 0, .06);
  color: #18181b;
  border-color: rgba(0, 0, 0, .12);
}

html.light .nav-item.active {
  background: linear-gradient(180deg, #f8f9fa, #fafafa);
  color: #18181b;
  border-color: rgba(0, 0, 0, .12);
  box-shadow:
    0 4px 12px rgba(0, 0, 0, .15),
    0 0 0 1px rgba(0, 0, 0, .08);
}

html.light .nav-item.trade {
  background: linear-gradient(180deg, rgba(16, 185, 129, .12), rgba(16, 185, 129, .06));
  border-color: rgba(16, 185, 129, .25);
  color: #059669;
}

html.light .nav-item.trade:hover {
  background: linear-gradient(180deg, rgba(16, 185, 129, .18), rgba(16, 185, 129, .1));
  border-color: rgba(16, 185, 129, .35);
}

html.light .nav-item.stream {
  background: linear-gradient(180deg, rgba(244, 183, 62, .12), rgba(244, 183, 62, .06));
  border-color: rgba(244, 183, 62, .25);
  color: #d97706;
}

html.light .nav-item.stream:hover {
  background: linear-gradient(180deg, rgba(244, 183, 62, .18), rgba(244, 183, 62, .1));
  border-color: rgba(244, 183, 62, .35);
  color: #b45309;
}

html.light .nav-item.chart {
  background: linear-gradient(180deg, rgba(59, 130, 246, .12), rgba(59, 130, 246, .06));
  border-color: rgba(59, 130, 246, .25);
  color: #2563eb;
}

html.light .nav-item.chart:hover {
  background: linear-gradient(180deg, rgba(59, 130, 246, .18), rgba(59, 130, 246, .1));
  border-color: rgba(59, 130, 246, .35);
  color: #1d4ed8;
}