/* =============================================================
   panels.css — Sliding right-side panel system
   Phase 10 UI Overhaul · fracturedveildnd.com
   ============================================================= */

/* ── Panel host (fixed right-side container) ──────────────── */

#panel-host {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 420px;
  z-index: 8000;
  transform: translateX(100%);
  transition: transform 280ms cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

#panel-host.open {
  transform: translateX(0);
  pointer-events: all;
}

/* ── Panel inner wrapper ──────────────────────────────────── */

.panel-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--surface);
  border-left: var(--border-ornate);
  border-top: 3px double var(--blood);
  box-shadow: var(--shadow-lg);
}

/* ── Panel header ─────────────────────────────────────────── */

.panel-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
  background: var(--parchment);
  border-bottom: var(--border-ornate);
  flex-shrink: 0;
  position: relative;
}

/* Corner flourish — decorative blood-red accent using CSS borders */
.panel-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-top: 20px solid var(--blood);
  border-right: 20px solid transparent;
  opacity: 0.35;
}

.panel-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--blood);
  margin: 0;
  flex: 1;
  line-height: 1.2;
}

.panel-close {
  background: none;
  border: none;
  color: var(--ink-muted);
  font-size: 1.2rem;
  line-height: 1;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: 3px;
  transition: color var(--transition), background var(--transition);
  font-family: var(--font-body);
}

.panel-close:hover {
  color: var(--blood);
  background: rgba(139, 26, 26, 0.08);
}

/* ── Panel body (scrollable content) ─────────────────────── */

.panel-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.5rem;
  /* Subtle inset shadow at top to suggest depth below header */
  box-shadow: var(--shadow-inset);
}

/* Scrollbar styling — parchment-themed */
.panel-body::-webkit-scrollbar {
  width: 6px;
}
.panel-body::-webkit-scrollbar-track {
  background: var(--surface-deep);
}
.panel-body::-webkit-scrollbar-thumb {
  background: rgba(139, 26, 26, 0.3);
  border-radius: 3px;
}
.panel-body::-webkit-scrollbar-thumb:hover {
  background: rgba(139, 26, 26, 0.5);
}

/* ── Panel section (collapsible) ──────────────────────────── */

.panel-section {
  margin-bottom: var(--spacing-md);
  border: var(--border-ornate);
  border-radius: var(--radius);
  overflow: hidden;
}

.panel-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--surface-deep);
  cursor: pointer;
  user-select: none;
  gap: var(--spacing-sm);
  border: none;
  width: 100%;
  text-align: left;
}

.panel-section-header:hover {
  background: rgba(139, 26, 26, 0.06);
}

.panel-section-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--blood);
  margin: 0;
}

.panel-section-chevron {
  font-size: 0.7rem;
  color: var(--ink-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.panel-section.collapsed .panel-section-chevron {
  transform: rotate(-90deg);
}

.panel-section-content {
  padding: var(--spacing-md);
  background: var(--surface);
}

.panel-section.collapsed .panel-section-content {
  display: none;
}

/* ── Mobile overlay (hidden on desktop) ───────────────────── */

#panel-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(59, 47, 30, 0.45);
  z-index: 7999;
  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);
}

#panel-overlay.visible {
  display: block;
}

@media (max-width: 768px) {
  #panel-host {
    width: 100%;
  }

  #panel-overlay.visible {
    display: block;
  }
}