/* ── Reset & Base ──────────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0a;
  --bg-surface: #0f0f0f;
  --green: #00ff41;
  --green-dim: #00cc33;
  --green-glow: rgba(0, 255, 65, 0.15);
  --amber: #ffb000;
  --amber-dim: #cc8c00;
  --red: #ff3333;
  --red-dim: #cc2929;
  --cyan: #00e5ff;
  --text: #c0c0c0;
  --text-dim: #606060;
  --border: #1a1a1a;
  --border-bright: #2a2a2a;
  --font-mono: "IBM Plex Mono", "Fira Code", "Consolas", "Monaco", monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  overflow: hidden;
}

/* ── Scanline Overlay ─────────────────────────────────────────── */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ── App Shell ────────────────────────────────────────────────── */
#app {
  max-width: 800px;
  width: 100%;
  height: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  padding: 1rem;
}

/* ── Screen States ────────────────────────────────────────────── */
.screen {
  display: none;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.screen.active {
  display: flex;
}

/* ── Landing Screen ───────────────────────────────────────────── */
#screen-landing {
  justify-content: center;
  align-items: center;
  gap: 2rem;
  text-align: center;
}

.ascii-header {
  font-size: 11px;
  line-height: 1.2;
  color: var(--green);
  text-shadow: 0 0 10px var(--green-glow), 0 0 20px var(--green-glow);
  white-space: pre;
  user-select: none;
}

.tagline {
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 0.5px;
}

.features {
  list-style: none;
  text-align: left;
  display: inline-block;
}

.features li {
  color: var(--text);
  font-size: 13px;
  padding: 0.25rem 0;
}

.features li::before {
  content: "› ";
  color: var(--green-dim);
}

.btn-primary {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green-dim);
  padding: 0.75rem 2rem;
  font-family: var(--font-mono);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-primary:hover {
  background: var(--green-glow);
  box-shadow: 0 0 15px var(--green-glow);
}

.btn-primary:active {
  background: rgba(0, 255, 65, 0.25);
}

.btn-secondary {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border-bright);
  padding: 0.5rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-secondary:hover {
  color: var(--text);
  border-color: var(--text-dim);
}

.landing-error {
  color: var(--red);
  font-size: 12px;
  display: none;
}

.landing-error.visible {
  display: block;
}

.github-link {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  color: var(--text-dim);
  font-size: 11px;
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.15s ease;
}

.github-link:hover {
  color: var(--text);
}

/* ── Waiting Screen ───────────────────────────────────────────── */
#screen-waiting {
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.codename-display {
  font-size: 16px;
  color: var(--cyan);
  text-shadow: 0 0 8px rgba(0, 229, 255, 0.3);
}

.codename-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.25rem;
}

.share-box {
  border: 1px solid var(--border-bright);
  padding: 1rem 1.5rem;
  background: var(--bg-surface);
  max-width: 100%;
  overflow: hidden;
}

.share-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
}

.share-link {
  font-size: 12px;
  color: var(--green);
  word-break: break-all;
  user-select: all;
  margin-bottom: 0.75rem;
}

.btn-copy {
  background: transparent;
  color: var(--green-dim);
  border: 1px solid var(--border-bright);
  padding: 0.35rem 1rem;
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-copy:hover {
  border-color: var(--green-dim);
}

.btn-copy.copied {
  color: var(--amber);
  border-color: var(--amber-dim);
}

.waiting-indicator {
  color: var(--amber);
  font-size: 13px;
}

.waiting-dots {
  display: inline-block;
  animation: pulse-dots 1.5s steps(4, end) infinite;
}

@keyframes pulse-dots {
  0%   { content: ""; }
  25%  { content: "."; }
  50%  { content: ".."; }
  75%  { content: "..."; }
}

.waiting-dots::after {
  content: "";
  animation: dots 1.5s steps(1, end) infinite;
}

@keyframes dots {
  0%   { content: ""; }
  25%  { content: "."; }
  50%  { content: ".."; }
  75%  { content: "..."; }
}

/* ── Chat Screen ──────────────────────────────────────────────── */
#screen-chat {
  gap: 0;
}

.status-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.status-codenames {
  color: var(--cyan);
}

.status-peer-wrap {
  position: relative;
  cursor: pointer;
}

.status-peer-summary {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
  display: inline-block;
  vertical-align: middle;
}

.status-peer-summary::after {
  content: " ▾";
  color: var(--text-dim);
  font-size: 10px;
}

.status-peer-wrap.expanded .status-peer-summary::after {
  content: " ▴";
}

.status-peer-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  z-index: 10;
  min-width: 160px;
  max-height: 200px;
  overflow-y: auto;
  scrollbar-width: none;
}

.status-peer-list::-webkit-scrollbar {
  display: none;
}

.status-peer-list.hidden {
  display: none;
}

.status-peer-item {
  color: var(--cyan);
  padding: 0.15rem 0;
  white-space: nowrap;
  font-size: 12px;
}

.status-separator {
  color: var(--text-dim);
}

.status-encryption {
  color: var(--green-dim);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}

.status-dot.disconnected {
  background: var(--red);
  box-shadow: 0 0 6px var(--red);
}

.status-entry {
  color: var(--green-dim);
  margin-left: auto;
}

.status-entry.entry-closed {
  color: var(--red-dim);
}

.message-log {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0;
  min-height: 0;
  scrollbar-width: none;
}

.message-log::-webkit-scrollbar {
  display: none;
}

.message {
  padding: 0.15rem 0;
  animation: fade-in 0.15s ease-out;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(2px); }
  to   { opacity: 1; transform: translateY(0); }
}

.msg-timestamp {
  color: var(--text-dim);
  font-size: 12px;
}

.msg-codename {
  font-size: 13px;
}

.msg-self .msg-codename {
  color: var(--cyan);
}

.msg-peer .msg-codename {
  color: var(--amber);
}

.msg-self .msg-text {
  color: var(--text);
}

.msg-peer .msg-text {
  color: var(--text);
}

.msg-system {
  color: var(--amber);
  font-style: italic;
  font-size: 12px;
  white-space: pre-wrap;
}

.msg-error {
  color: var(--red);
  font-size: 12px;
}

.msg-crypto {
  color: var(--green-dim);
  font-size: 12px;
}

.input-area {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border);
  padding: 0.5rem 0;
  flex-shrink: 0;
}

.input-prompt {
  color: var(--green);
  margin-right: 0.5rem;
  user-select: none;
  flex-shrink: 0;
}

.input-field {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  caret-color: var(--green);
}

.input-field::placeholder {
  color: var(--text-dim);
}

.input-field:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ── Destroyed Screen ─────────────────────────────────────────── */
#screen-destroyed {
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.destroyed-icon {
  font-size: 48px;
  color: var(--red);
  line-height: 1;
}

.destroyed-title {
  font-size: 20px;
  color: var(--red);
  text-shadow: 0 0 10px rgba(255, 51, 51, 0.3);
  text-transform: uppercase;
  letter-spacing: 3px;
}

.destroyed-message {
  color: var(--text-dim);
  font-size: 13px;
  max-width: 400px;
  line-height: 1.8;
}

/* ── Joiner Error Screen ──────────────────────────────────────── */
#screen-error {
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.error-title {
  font-size: 18px;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.error-message {
  color: var(--text-dim);
  font-size: 13px;
  max-width: 400px;
}

/* ── Attach Button ───────────────────────────────────────────── */
.btn-attach {
  background: transparent;
  color: var(--green-dim);
  border: 1px solid var(--green-dim);
  padding: 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
  margin-right: 0.5rem;
  flex-shrink: 0;
  line-height: 1.6;
}

.btn-attach:hover {
  color: var(--green);
  box-shadow: 0 0 8px var(--green-glow);
}

.btn-attach:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  box-shadow: none;
}

/* ── File Messages ───────────────────────────────────────────── */
.file-download {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-style: dashed;
  text-underline-offset: 2px;
}

.file-download:hover {
  text-shadow: 0 0 6px rgba(0, 229, 255, 0.4);
}

.file-size {
  color: var(--text-dim);
  font-size: 12px;
}

.file-preview {
  display: block;
  max-width: 300px;
  max-height: 200px;
  border: 1px solid var(--border-bright);
  margin-top: 0.25rem;
}

/* ── Drag-Over State ─────────────────────────────────────────── */
.message-log.drag-over {
  border: 1px dashed var(--green-dim);
  background: rgba(0, 255, 65, 0.03);
}

/* ── Utilities ────────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 600px) {
  #app {
    padding: 0.75rem;
  }

  .ascii-header {
    font-size: 7px;
  }

  .status-bar {
    font-size: 11px;
    gap: 0.5rem;
  }
}