.message-panel-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.message-panel-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.message-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: min(480px, 100vw);
  height: 100%;
  max-height: 100dvh;
  background: rgba(12, 12, 12, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid rgba(255, 255, 255, 0.05);
  z-index: 210;
  display: flex;
  flex-direction: column;
  padding: max(32px, env(safe-area-inset-top)) max(24px, env(safe-area-inset-right)) max(32px, env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left));
  box-shadow: -20px 0 60px rgba(0, 0, 0, 0.6);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

.message-panel.is-open {
  transform: translateX(0);
}

.message-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.message-panel-header h2 {
  font-family: var(--font-flap);
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.message-panel-close {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.message-panel-close:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.05);
}

.message-panel-hint {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: sans-serif;
}

.message-panel-hint kbd {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}

.message-panel-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 12px;
}

.message-input {
  width: 100%;
  box-sizing: border-box;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 16px;
  font-family: var(--font-flap);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.5;
  resize: vertical;
  min-height: 160px;
  margin-bottom: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.5);
}

.message-input:focus {
  outline: none;
  border-color: #fff;
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.05), inset 0 2px 10px rgba(0,0,0,0.5);
}

.message-panel-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

/* Primary actions */
.message-panel-primary,
.message-panel-secondary,
.message-panel-danger {
  width: 100%;
  padding: 16px;
  border-radius: 12px;
  font-size: 14px;
  font-family: var(--font-flap);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.message-panel-primary {
  background: #ffffff;
  color: #000000;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
}

.message-panel-primary:hover {
  background: #e0e0e0;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
}

.message-panel-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.message-panel-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.message-panel-danger {
  background: rgba(255, 50, 50, 0.05);
  color: #ff5555;
  border: 1px solid rgba(255, 50, 50, 0.2);
}

.message-panel-danger:hover {
  background: rgba(255, 50, 50, 0.1);
  border-color: rgba(255, 50, 50, 0.4);
}

.message-section-title {
  font-size: 14px;
  font-family: var(--font-flap);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  margin: 24px 0 12px;
}

.message-list-heading {
  font-size: 14px;
  font-family: var(--font-flap);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin: 32px 0 16px;
}

.message-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message-list-item {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: border-color 0.2s;
}

.message-list-item.is-current {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
}

.message-list-preview {
  font-size: 14px;
  line-height: 1.4;
  font-family: var(--font-flap);
  color: rgba(255, 255, 255, 0.85);
  text-transform: uppercase;
  margin-bottom: 12px;
  max-height: 100px;
  overflow: hidden;
}

.message-list-actions {
  display: flex;
  justify-content: flex-end;
}

.message-list-remove {
  padding: 8px 16px;
  font-size: 12px;
  font-family: var(--font-flap);
  letter-spacing: 0.1em;
  font-weight: 700;
  text-transform: uppercase;
  border: none;
  border-radius: 6px;
  background: rgba(255, 50, 50, 0.1);
  color: #ff5555;
  cursor: pointer;
  transition: all 0.2s;
}

.message-list-remove:hover {
  background: #ff5555;
  color: #fff;
}

.message-list-empty {
  font-size: 14px;
  font-family: var(--font-flap);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.3);
  padding: 16px 0;
  text-align: center;
}

.message-panel-code {
  font-family: monospace;
  background: rgba(255,255,255,0.1);
  padding: 2px 6px;
  border-radius: 4px;
}

@media (max-width: 600px) {
  .message-panel {
    padding: 24px 16px;
  }
}