:root {
  --bg: #0c111b;
  --panel: rgba(15, 23, 42, 0.75);
  --panel-strong: rgba(10, 15, 26, 0.9);
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: rgba(148, 163, 184, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 15% 10%, rgba(56, 189, 248, 0.15), transparent 45%),
    radial-gradient(circle at 80% 0%, rgba(14, 165, 233, 0.12), transparent 50%),
    linear-gradient(180deg, rgba(12, 17, 27, 0.95), rgba(12, 17, 27, 1));
  color: var(--text);
  min-height: 100vh;
}

.app {
  display: grid;
  grid-template-columns: 260px 1fr 240px;
  gap: 1.2rem;
  padding: 1.2rem;
  height: 100vh;
}

.leftbar,
.rightbar,
.chat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.leftbar-header,
.rightbar-header,
.chat-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.leftbar-header h1 {
  font-family: "Russo One", "IBM Plex Sans", sans-serif;
  font-size: 1.1rem;
  margin: 0;
}

.channel-groups {
  padding: 0.6rem 0.6rem 1rem;
  overflow-y: auto;
  flex: 1 1 auto;
}

.group-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0.6rem 0.4rem 0.3rem;
}

.channel {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.7rem;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--text);
  background: rgba(12, 17, 27, 0.6);
  cursor: pointer;
}

.channel-icon {
  width: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.channel.is-active {
  border-color: rgba(56, 189, 248, 0.6);
  background: rgba(14, 165, 233, 0.18);
}

.channel.is-unread {
  border-color: rgba(34, 197, 94, 0.6);
  background: rgba(34, 197, 94, 0.12);
}

.channel-name {
  flex: 1;
}

.badge-pill {
  background: rgba(56, 189, 248, 0.2);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  font-size: 0.75rem;
}

.badge-pill:empty {
  display: none;
}

.chat-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(14, 165, 233, 0.15);
  color: var(--accent);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 0.4rem;
}

.chat {
  position: relative;
}

.chat-body {
  flex: 1 1 auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  overflow-y: auto;
}

.message {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0.8rem;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.2);
  display: grid;
  place-items: center;
  font-weight: 600;
}

.message-meta {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.8rem;
}

.message-meta strong {
  color: var(--text);
  font-size: 0.9rem;
}

.chat-input {
  display: flex;
  gap: 0.8rem;
  padding: 1rem;
  border-top: 1px solid var(--border);
}

.chat-input input {
  flex: 1;
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(12, 17, 27, 0.7);
  color: var(--text);
}

.btn {
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.75);
  color: var(--text);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}

.btn.primary {
  background: rgba(56, 189, 248, 0.2);
  border-color: rgba(56, 189, 248, 0.6);
}

.btn.ghost {
  background: rgba(12, 17, 27, 0.6);
}

.rightbar {
  min-width: 200px;
}

.leftbar-footer {
  border-top: 1px solid var(--border);
  padding: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.user-card {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.user-meta {
  display: flex;
  flex-direction: column;
}

.user-status {
  color: var(--muted);
  font-size: 0.8rem;
}

.user-actions {
  display: flex;
  gap: 0.5rem;
}

.user-actions .btn {
  flex: 1;
}

.btn.is-active {
  border-color: rgba(34, 197, 94, 0.6);
  background: rgba(34, 197, 94, 0.15);
}

.btn.is-muted {
  border-color: rgba(239, 68, 68, 0.6);
  background: rgba(239, 68, 68, 0.15);
}

.member-list {
  padding: 0.8rem 1rem;
  overflow-y: auto;
  display: grid;
  gap: 0.6rem;
}

.member-group {
  padding: 0.4rem 0.2rem 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.member-group .group-title {
  margin: 0.4rem 0.6rem 0.2rem;
}

.member-group .member-list {
  padding: 0 0.8rem 0.6rem;
  max-height: 30vh;
}

.member {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.member.is-speaking .avatar {
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.7);
}

.member.is-speaking .member-name {
  color: #86efac;
}

.member-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app.is-rightbar-collapsed {
  grid-template-columns: 260px 1fr 80px;
}

.rightbar.is-collapsed .rightbar-header h3 {
  display: none;
}

.rightbar.is-collapsed .member-list {
  justify-items: center;
}

.rightbar.is-collapsed .member {
  justify-content: center;
}

.rightbar.is-collapsed .member-name {
  display: none;
}

.rightbar.is-collapsed .group-title {
  display: none;
}

.floating {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 4.8rem;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid rgba(56, 189, 248, 0.6);
  background: rgba(56, 189, 248, 0.2);
  color: var(--text);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.floating.is-visible {
  display: inline-flex;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.modal.active {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 11, 20, 0.7);
}

.modal-card {
  position: relative;
  z-index: 1;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  width: min(420px, 92%);
  display: grid;
  gap: 0.8rem;
}

.settings-card {
  width: min(480px, 92%);
}

.modal-card input,
.modal-card select {
  padding: 0.6rem 0.8rem;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(12, 17, 27, 0.7);
  color: var(--text);
}

.modal-card input[type="range"] {
  padding: 0.2rem 0;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 980px) {
  .app {
    grid-template-columns: 1fr;
    height: auto;
  }
  .rightbar {
    order: 3;
  }
}