/* ─── Cathode — terminal IRC client ─────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,600;1,400&display=swap');

/* ─── Theme variables ─────────────────────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --bg:          #0a0a0a;
  --bg-panel:    #111111;
  --bg-input:    #0f0f0f;
  --bg-hover:    #1a1a1a;
  --bg-active:   #1f1f1f;
  --fg:          #e0e0e0;
  --fg-dim:      #888888;
  --fg-dimmer:   #3a3a3a;
  --accent:      #e0e0e0;
  --accent-hl:   #ffffff;
  --border:      #2a2a2a;
  --border-l:    #333333;
  --unread:      #888888;
  --highlight:   #ffee00;
  --hl-bg:       #1a1800;
  --cursor:      #e0e0e0;
  --scrollbar:   #2a2a2a;
  --status-conn: #55cc55;
  --status-disc: #cc5555;
  --link:        #88bbff;
  --scanline-opacity: 0.015;
  --prefix-col-width: 148px;  /* updated by applyPrefixWidth() */
}

[data-theme="light"] {
  --bg:          #f5f5f5;
  --bg-panel:    #ebebeb;
  --bg-input:    #ffffff;
  --bg-hover:    #e0e0e0;
  --bg-active:   #d8d8d8;
  --fg:          #111111;
  --fg-dim:      #666666;
  --fg-dimmer:   #bbbbbb;
  --accent-hl:   #000000;
  --border:      #d0d0d0;
  --border-l:    #c0c0c0;
  --unread:      #555555;
  --highlight:   #996600;
  --hl-bg:       #fff8e0;
  --cursor:      #111111;
  --scrollbar:   #cccccc;
  --status-conn: #228822;
  --status-disc: #882222;
  --link:        #0055cc;
  --scanline-opacity: 0;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--fg);
  caret-color: var(--cursor);
}

/* CRT scanline overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,var(--scanline-opacity)) 2px,
    rgba(0,0,0,var(--scanline-opacity)) 4px
  );
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 0; }

/* ─── Layout shell ────────────────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* ─── Topbar ──────────────────────────────────────────────────────────────── */
#topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  height: 36px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  flex-shrink: 0;
  user-select: none;
}

#topbar .logo {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.15em;
  color: var(--accent-hl);
}

#topbar .logo span {
  color: var(--fg-dim);
  font-weight: 400;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 4px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background 0.3s;
}
.status-dot.connected    { background: var(--status-conn); box-shadow: 0 0 6px var(--status-conn); }
.status-dot.disconnected { background: var(--status-disc); }
.status-dot.connecting   { background: var(--fg-dim); animation: blink 0.8s step-end infinite; }

@keyframes blink { 50% { opacity: 0; } }

#status-text {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
}

.topbar-spacer { flex: 1; }

.topbar-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 3px 9px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.topbar-btn:hover {
  border-color: var(--border-l);
  color: var(--fg);
}

/* Theme toggle — amber in dark, indigo in light */
#theme-toggle {
  color: #b8860b;
  border-color: #3a2e00;
}
[data-theme="light"] #theme-toggle {
  color: #4455bb;
  border-color: #9aabdd;
}
#theme-toggle:hover {
  color: #e0a800;
  border-color: #6a5200;
  background: #1a1000;
}
[data-theme="light"] #theme-toggle:hover {
  color: #2233aa;
  border-color: #6677cc;
  background: #eef0ff;
}

/* Quit button — red */
#disconnect-btn {
  color: #aa3333;
  border-color: #3a1010;
}
[data-theme="light"] #disconnect-btn {
  color: #991111;
  border-color: #ddaaaa;
}
#disconnect-btn:hover {
  color: #ff5555;
  border-color: #aa3333;
  background: #1a0000;
}
[data-theme="light"] #disconnect-btn:hover {
  color: #cc1111;
  border-color: #cc4444;
  background: #fff0f0;
}

/* ─── Connect screen ─────────────────────────────────────────────────────── */
#connect-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--bg);
}

/* HTTPS/ws warning banner — shown above the connect box */
#http-notice {
  width: 420px;
  padding: 10px 14px;
  border: 1px solid #553300;
  border-left: 3px solid #cc6600;
  background: #1a0d00;
  font-size: 11px;
  line-height: 1.7;
  color: #cc8833;
}
[data-theme="light"] #http-notice {
  background: #fff5e6;
  border-color: #e09040;
  border-left-color: #cc6600;
  color: #7a4400;
}
#http-notice strong { color: inherit; font-weight: 600; }
#http-notice code   { font-family: inherit; opacity: 0.85; }
#http-notice a      { color: inherit; text-decoration: underline; }
#http-notice a:hover { opacity: 0.8; }

#tls-locked-note {
  color: #cc6600;
  font-size: 10px;
  letter-spacing: 0.05em;
}
[data-theme="light"] #tls-locked-note { color: #994400; }

.connect-box {
  width: 420px;
  border: 1px solid var(--border-l);
  background: var(--bg-panel);
  padding: 0;
}

.connect-box-header {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--fg);
}

.connect-box-body {
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field label {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fg);
}

.field input[type="text"],
.field input[type="number"],
.field input[type="password"] {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: inherit;
  font-size: 13px;
  padding: 7px 10px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.field input:focus {
  border-color: var(--border-l);
}

.field-row {
  display: flex;
  gap: 10px;
}
.field-row .field { flex: 1; }
.field-row .field.short { flex: 0 0 100px; }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--fg);
  cursor: pointer;
  user-select: none;
}
.checkbox-row input { cursor: pointer; accent-color: var(--fg); }

#port-warning {
  display: none;
  font-size: 11px;
  color: #cc8800;
  padding: 6px 8px;
  border: 1px solid #553300;
  background: #1a0f00;
}
[data-theme="light"] #port-warning {
  background: #fff8e0;
  border-color: #cc8800;
}

#conn-error {
  display: none;
  font-size: 11px;
  color: #ff6666;
  padding: 6px 8px;
  border: 1px solid #440000;
  background: #110000;
}
[data-theme="light"] #conn-error {
  background: #fff0f0;
  border-color: #cc4444;
  color: #881111;
}

.connect-actions {
  display: flex;
  gap: 10px;
  padding-top: 4px;
}

.btn-primary {
  flex: 1;
  background: var(--fg);
  color: var(--bg);
  border: none;
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  padding: 9px 16px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-primary:hover:not(:disabled) { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  background: none;
  border: 1px solid var(--border-l);
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.12em;
  padding: 9px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, color 0.15s;
}
.btn-secondary:hover { border-color: var(--fg-dim); color: var(--fg); }

/* Self-signed cert hint — amber callout box */
.cert-hint {
  font-size: 11px;
  color: #c8920a;
  line-height: 1.6;
  padding: 8px 12px;
  border: 1px solid #6a4a00;
  background: #1a1000;
  border-left: 3px solid #c8920a;
}
[data-theme="light"] .cert-hint {
  color: #7a5200;
  border-color: #e0b040;
  border-left-color: #c8920a;
  background: #fffae8;
}

/* ─── Chat screen ────────────────────────────────────────────────────────── */
#chat-screen {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* ─── Buffer sidebar ─────────────────────────────────────────────────────── */
#sidebar {
  width: 180px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--bg-panel);
  overflow: hidden;
}

#sidebar-header {
  padding: 8px 12px;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#buffer-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.buffer-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  cursor: pointer;
  font-size: 12px;
  color: var(--fg-dim);
  transition: background 0.1s, color 0.1s;
  min-height: 24px;
}
.buffer-item:hover    { background: var(--bg-hover); color: var(--fg); }
.buffer-item.active   { background: var(--bg-active); color: var(--fg); }
.buffer-item.unread   { color: var(--unread); }
.buffer-item.highlight { color: var(--highlight); }

/* Group header (synthetic, no buffer) */
.buf-group-header {
  padding: 8px 12px 3px;
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--fg-dimmer);
  text-transform: uppercase;
  user-select: none;
  border-top: 1px solid var(--border);
  margin-top: 2px;
}
.buf-group-header:first-child {
  border-top: none;
  margin-top: 0;
}

/* Server buffer row (bold, acts as section header) */
.buffer-item.buf-server {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--fg);
  padding-top: 6px;
  padding-bottom: 6px;
  border-top: 1px solid var(--border);
  margin-top: 2px;
}
.buffer-item.buf-server:first-child {
  border-top: none;
  margin-top: 0;
}
.buffer-item.buf-server .buf-name {
  font-weight: 600;
}

/* Channel/private rows indented under server */
.buffer-item.buf-indented {
  padding-left: 20px;
}
.buffer-item.buf-indented .buf-num {
  width: 14px;
}

.buf-num {
  font-size: 10px;
  color: var(--fg-dimmer);
  width: 16px;
  flex-shrink: 0;
  text-align: right;
}
.buf-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.badge {
  font-size: 9px;
  padding: 1px 5px;
  background: var(--fg-dimmer);
  color: var(--bg);
  flex-shrink: 0;
}
.hl-badge {
  background: var(--highlight);
  color: #000;
}

/* ─── Main chat area ─────────────────────────────────────────────────────── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  position: relative;  /* anchor for .new-msg-banner */
}

/* ─── Chat header ────────────────────────────────────────────────────────── */
#chat-header {
  padding: 6px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  flex-shrink: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-height: 34px;
}

#chat-title {
  font-weight: 600;
  font-size: 13px;
  color: var(--accent-hl);
  flex-shrink: 0;
}

#chat-topic {
  font-size: 11px;
  color: var(--fg-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

/* ─── Messages ───────────────────────────────────────────────────────────── */
#messages {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
  background: var(--bg);
}

.msg-row {
  display: flex;
  align-items: stretch;   /* stretch so msg-sep fills full row height */
  gap: 0;
  padding: 1px 14px;
  font-size: 13px;
  line-height: 1.55;
  transition: background 0.1s;
}
.msg-row:hover { background: var(--bg-hover); }
.msg-row.msg-highlight { background: var(--hl-bg); }
.msg-row.msg-system { color: var(--fg-dim); font-style: italic; }

.msg-time {
  color: var(--fg-dimmer);
  font-size: 11px;
  flex-shrink: 0;
  width: 60px;
  padding-right: 6px;
  padding-top: 2px;    /* realign text to top within stretched row */
  user-select: none;
}

.msg-prefix {
  flex-shrink: 0;
  width: var(--prefix-col-width);
  text-align: right;
  padding-right: 8px;
  padding-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  /* colour and content come from WeeChat ANSI — no override here */
}

.msg-text {
  flex: 1;
  word-break: break-word;
  overflow-wrap: anywhere;
  color: var(--fg);
  min-width: 0;
  padding-top: 2px;
  padding-bottom: 1px;
}

/* Border-based separator — stretches naturally with the row height */
.msg-sep {
  flex-shrink: 0;
  width: 0;
  border-left: 1px solid var(--fg-dimmer);
  margin-right: 8px;
  user-select: none;
}

/* ─── New messages banner ────────────────────────────────────────────────── */
.new-msg-banner {
  position: absolute;
  bottom: 46px; /* above inputbar */
  left: 50%;
  transform: translateX(-50%);
  background: var(--fg);
  color: var(--bg);
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 5px 16px;
  cursor: pointer;
  white-space: nowrap;
  z-index: 100;
  opacity: 0.92;
  transition: opacity 0.15s;
}
.new-msg-banner:hover { opacity: 1; }

/* ─── Nicklist panel — always visible ────────────────────────────────────── */
#nicklist-panel {
  width: 150px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  background: var(--bg-panel);
  overflow: hidden;
}

#nicklist-header {
  padding: 8px 12px;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  user-select: none;
}

#nicklist {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.nick-item {
  display: flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--fg-dim);
  gap: 3px;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}
.nick-item:hover {
  background: var(--bg-hover);
  color: var(--fg);
}
.nick-pfx {
  color: var(--fg-dimmer);
  width: 10px;
  flex-shrink: 0;
}
.nick-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ─── Nick context menu ──────────────────────────────────────────────────── */
.nick-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.5);
}
[data-theme="light"] .nick-overlay { background: rgba(0,0,0,0.2); }

.nick-menu {
  background: var(--bg-panel);
  border: 1px solid var(--border-l);
  min-width: 210px;
  display: flex;
  flex-direction: column;
}

.nick-menu-hdr {
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-hl);
  border-bottom: 1px solid var(--border);
  user-select: none;
}

.nick-menu-btn {
  background: none;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 12px;
  padding: 9px 16px;
  text-align: left;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}
.nick-menu-btn:last-child { border-bottom: none; }
.nick-menu-btn:hover { background: var(--bg-hover); color: var(--fg); }

/* ─── Input bar ──────────────────────────────────────────────────────────── */
#inputbar {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  flex-shrink: 0;
  height: 38px;
}

#input-prompt {
  padding: 0 10px;
  color: var(--fg-dimmer);
  font-size: 14px;
  user-select: none;
  flex-shrink: 0;
}

#chat-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--fg);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  padding: 0;
  height: 100%;
}
#chat-input::placeholder { color: var(--fg-dimmer); }

#send-btn {
  background: none;
  border: none;
  border-left: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.12em;
  padding: 0 14px;
  height: 100%;
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}
#send-btn:hover { color: var(--fg); background: var(--bg-hover); }

/* Paperclip upload button in inputbar */
.inputbar-btn {
  background: none;
  border: none;
  border-left: 1px solid var(--border);
  color: var(--fg-dim);
  font-size: 14px;
  padding: 0 10px;
  height: 100%;
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}
.inputbar-btn:hover  { color: var(--fg); background: var(--bg-hover); }
.inputbar-btn.uploading { color: #cc8800; animation: blink 0.6s step-end infinite; }
.inputbar-btn.upload-ok  { color: var(--status-conn); }
.inputbar-btn.upload-err { color: var(--status-disc); }

/* ─── Drag overlay ───────────────────────────────────────────────────────── */
#drag-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
[data-theme="light"] #drag-overlay { background: rgba(255,255,255,0.75); }

.drag-overlay-inner {
  border: 2px dashed var(--fg-dim);
  padding: 40px 60px;
  font-size: 16px;
  letter-spacing: 0.3em;
  color: var(--fg);
}

/* Messages area drag-over state */
#messages.drag-over { outline: 2px dashed var(--fg-dim); outline-offset: -4px; }

/* ─── Settings panel ─────────────────────────────────────────────────────── */
#settings-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}
[data-theme="light"] #settings-overlay { background: rgba(0,0,0,0.2); }

#settings-panel {
  width: 380px;
  background: var(--bg-panel);
  border: 1px solid var(--border-l);
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--fg);
  flex-shrink: 0;
}

#settings-close {
  background: none;
  border: none;
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  padding: 0 2px;
}
#settings-close:hover { color: var(--fg); }

.settings-body {
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

.settings-section {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fg-dimmer);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  margin-top: 4px;
}

.settings-body .field label {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
}

.settings-body select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: inherit;
  font-size: 13px;
  padding: 7px 10px;
  outline: none;
  width: 100%;
  cursor: pointer;
}
.settings-body select:focus { border-color: var(--border-l); }

.settings-actions {
  padding-top: 8px;
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */
#footer {
  padding: 3px 14px;
  font-size: 10px;
  color: var(--fg-dimmer);
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  flex-shrink: 0;
  letter-spacing: 0.05em;
}
#footer a { color: var(--fg-dimmer); }
#footer a:hover { color: var(--fg-dim); }

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
  #sidebar { width: 140px; }
  #nicklist-panel { display: none; }
  .msg-prefix { width: 90px; }
  .msg-time { width: 56px; font-size: 10px; }
}

@media (max-width: 480px) {
  #sidebar { width: 110px; }
  .msg-prefix { width: 70px; }
}