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

:root {
  --bg:       #0d0f14;
  --surface:  #131620;
  --surface2: #1a1e2b;
  --border:   #252a3a;
  --border2:  #2e3448;
  --accent:   #00e5ff;
  --accent2:  #7b61ff;
  --text:     #e2e8f8;
  --text-dim: #6b7694;
  --text-mid: #9ba5c2;
  --green:    #39ff8a;
  --red:      #ff5e7a;
  --radius:   10px;
  --sidebar-w: 230px;
}

html, body {
  height: 100%; height: 100dvh;
  background: var(--bg); color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px; overflow: hidden;
}

.screen { display: none; height: 100dvh; width: 100%; }
.screen.active { display: flex; }
#chat-screen { height: 100dvh; max-height: -webkit-fill-available; }

/* JOIN SCREEN */
#join-screen { align-items: center; justify-content: center; position: relative; overflow: hidden; }

.bg-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px; opacity: 0.35; pointer-events: none;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 30%, transparent 100%);
}

.join-card {
  position: relative; z-index: 1;
  background: var(--surface); border: 1px solid var(--border2); border-radius: 16px;
  padding: 44px 40px 40px; width: 100%; max-width: 420px;
  box-shadow: 0 0 60px rgba(0,229,255,0.06), 0 24px 48px rgba(0,0,0,0.5);
  animation: cardIn 0.5s cubic-bezier(.16,1,.3,1) both;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(24px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}

.join-logo {
  font-family: 'Syne', sans-serif; font-size: 26px; font-weight: 800;
  letter-spacing: 0.08em; margin-bottom: 8px; display: flex; align-items: center; gap: 2px;
}
.logo-bracket { color: var(--text-dim); font-weight: 400; }
.logo-text { color: var(--text); }
.accent { color: var(--accent); }

.join-subtitle { color: var(--text-dim); font-size: 12px; margin-bottom: 32px; line-height: 1.6; }

.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }
.form-group label { font-size: 10px; font-weight: 700; letter-spacing: 0.12em; color: var(--text-dim); }
.form-group input {
  background: var(--bg); border: 1px solid var(--border2); border-radius: var(--radius);
  padding: 12px 14px; color: var(--text); font-family: inherit; font-size: 14px; outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,229,255,0.1); }
.form-group input::placeholder { color: var(--text-dim); }
.field-hint { font-size: 11px; color: var(--text-dim); line-height: 1.5; }

.join-btn {
  width: 100%; margin-top: 8px; padding: 14px; background: var(--accent); color: #000; border: none;
  border-radius: var(--radius); font-family: 'Syne', sans-serif; font-size: 14px; font-weight: 700;
  letter-spacing: 0.1em; cursor: pointer; display: flex; align-items: center; justify-content: center;
  gap: 8px; transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 0 20px rgba(0,229,255,0.25);
}
.join-btn:hover { background: #33ecff; box-shadow: 0 0 28px rgba(0,229,255,0.4); transform: translateY(-1px); }
.join-btn:active { transform: translateY(0); }
.join-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

.wake-status { color: var(--accent); font-size: 12px; margin-top: 8px; text-align: center; min-height: 18px; animation: blink 1.2s infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.error-msg { color: var(--red); font-size: 12px; margin-top: 12px; min-height: 18px; text-align: center; animation: shake 0.3s ease; }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }

/* CHAT SCREEN */
#chat-screen { flex-direction: row; }

/* SIDEBAR */
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0; background: var(--surface);
  border-right: 1px solid var(--border); display: flex; flex-direction: column;
  padding: 24px 20px; gap: 20px; transition: transform 0.3s ease; overflow-y: auto;
}

.sidebar-logo { font-family: 'Syne', sans-serif; font-size: 18px; font-weight: 800; letter-spacing: 0.08em; display: flex; gap: 2px; }

.room-info-block {
  background: var(--surface2); border: 1px solid var(--border2); border-radius: var(--radius);
  padding: 16px; display: flex; flex-direction: column; gap: 8px;
}

.room-label, .you-label, .members-label {
  font-size: 10px; font-weight: 700; letter-spacing: 0.12em; color: var(--text-dim);
}

.room-ip { color: var(--accent); font-size: 13px; word-break: break-all; line-height: 1.4; }

.users-online { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-mid); }

.dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--green);
  box-shadow: 0 0 6px var(--green); animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* MEMBERS LIST */
.members-block { display: flex; flex-direction: column; gap: 8px; }

.members-list { display: flex; flex-direction: column; gap: 4px; }

.member-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: 8px;
  background: var(--surface2); border: 1px solid var(--border);
  animation: memberIn 0.2s ease both;
  transition: border-color 0.2s;
}

.member-item:hover { border-color: var(--border2); }

@keyframes memberIn {
  from { opacity: 0; transform: translateX(-8px); }
  to   { opacity: 1; transform: none; }
}

.member-dot {
  width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0;
  background: var(--green); box-shadow: 0 0 5px var(--green);
}

.member-name {
  font-size: 12px; color: var(--text); flex: 1;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.member-me .member-name { color: var(--accent); }

.member-you-tag {
  font-size: 9px; font-weight: 700; letter-spacing: 0.08em;
  color: var(--accent); background: rgba(0,229,255,0.1);
  border: 1px solid rgba(0,229,255,0.25); border-radius: 4px;
  padding: 1px 5px; flex-shrink: 0;
}

.leave-btn {
  margin-top: auto; background: transparent; border: 1px solid var(--border2);
  border-radius: var(--radius); color: var(--text-dim); font-family: inherit;
  font-size: 12px; padding: 10px; cursor: pointer; letter-spacing: 0.05em;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.leave-btn:hover { border-color: var(--red); color: var(--red); background: rgba(255,94,122,0.06); }

/* MAIN CHAT AREA */
.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); overflow: hidden; }

.chat-header {
  display: flex; align-items: center; gap: 12px; padding: 0 20px; height: 60px;
  border-bottom: 1px solid var(--border); background: var(--surface); flex-shrink: 0;
}

.menu-toggle { display: none; background: none; border: none; color: var(--text-dim); font-size: 20px; cursor: pointer; line-height: 1; padding: 4px; }
.header-label { color: var(--text-dim); font-size: 11px; font-weight: 700; letter-spacing: 0.12em; }
.header-room { display: flex; align-items: center; gap: 8px; flex: 1; }
#header-ip { color: var(--accent); font-size: 13px; }
.header-user { font-size: 12px; color: var(--text-mid); padding: 4px 10px; border: 1px solid var(--border2); border-radius: 20px; }

/* MESSAGES */
.messages-area {
  flex: 1; overflow-y: auto; padding: 20px 24px;
  display: flex; flex-direction: column; gap: 4px; scroll-behavior: smooth;
}
.messages-area::-webkit-scrollbar { width: 4px; }
.messages-area::-webkit-scrollbar-track { background: transparent; }
.messages-area::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }

.welcome-msg { text-align: center; color: var(--text-dim); font-size: 11px; margin: 12px 0 20px; letter-spacing: 0.08em; }

.msg { display: flex; flex-direction: column; max-width: 72%; animation: msgIn 0.2s ease both; }
@keyframes msgIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.msg.self { align-self: flex-end; }
.msg.other { align-self: flex-start; }

.msg-meta { display: flex; align-items: baseline; gap: 8px; margin-bottom: 4px; padding: 0 4px; }
.msg.self .msg-meta { flex-direction: row-reverse; }
.msg-author { font-size: 11px; font-weight: 700; letter-spacing: 0.06em; }
.msg.self .msg-author { color: var(--accent2); }
.msg.other .msg-author { color: var(--accent); }
.msg-time { font-size: 10px; color: var(--text-dim); }

.msg-bubble { padding: 10px 14px; border-radius: 12px; line-height: 1.55; word-break: break-word; font-size: 14px; }
.msg.self .msg-bubble { background: var(--accent2); color: #fff; border-bottom-right-radius: 4px; }
.msg.other .msg-bubble { background: var(--surface2); border: 1px solid var(--border); color: var(--text); border-bottom-left-radius: 4px; }

.system-msg {
  align-self: center; font-size: 11px; color: var(--text-dim); padding: 4px 14px;
  background: var(--surface2); border-radius: 20px; border: 1px solid var(--border);
  margin: 8px 0; animation: msgIn 0.2s ease both; letter-spacing: 0.04em;
}

/* INPUT BAR */
.input-bar {
  display: flex; align-items: center; gap: 10px; padding: 14px 20px;
  border-top: 1px solid var(--border); background: var(--surface); flex-shrink: 0;
}

#message-input {
  flex: 1; background: var(--surface2); border: 1px solid var(--border2); border-radius: 24px;
  padding: 11px 18px; color: var(--text); font-family: inherit; font-size: 14px; outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
#message-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,229,255,0.08); }
#message-input::placeholder { color: var(--text-dim); }

.send-btn {
  width: 44px; height: 44px; flex-shrink: 0; background: var(--accent); color: #000; border: none;
  border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s; box-shadow: 0 0 14px rgba(0,229,255,0.3);
}
.send-btn:hover { background: #33ecff; box-shadow: 0 0 20px rgba(0,229,255,0.5); transform: scale(1.07); }
.send-btn:active { transform: scale(0.96); }

.clear-btn {
  background: transparent; border: 1px solid var(--border2); border-radius: var(--radius);
  color: var(--text-dim); font-family: inherit; font-size: 12px; padding: 6px 12px;
  cursor: pointer; transition: border-color 0.2s, color 0.2s, background 0.2s; letter-spacing: 0.04em;
}
.clear-btn:hover { border-color: var(--red); color: var(--red); background: rgba(255,94,122,0.06); }

/* IMAGE */
.image-btn {
  width: 44px; height: 44px; flex-shrink: 0; background: var(--surface2); color: var(--accent);
  border: 1px solid var(--border2); border-radius: 50%; cursor: pointer; display: flex;
  align-items: center; justify-content: center;
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.image-btn:hover { background: var(--border2); border-color: var(--accent); box-shadow: 0 0 10px rgba(0,229,255,0.2); }

.msg-image { max-width: 280px; max-height: 200px; width: 100%; height: auto; border-radius: 10px; cursor: pointer; display: block; object-fit: cover; transition: opacity 0.2s, transform 0.2s; }
.msg-image:hover { opacity: 0.9; transform: scale(1.02); }

.img-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.92); z-index: 999; display: flex; align-items: center; justify-content: center; cursor: zoom-out; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.img-overlay img { max-width: 92vw; max-height: 92vh; border-radius: 10px; box-shadow: 0 0 60px rgba(0,0,0,0.8); }

.uploading-indicator { font-size: 12px; color: var(--accent); padding: 6px 14px; background: var(--surface2); border-radius: 20px; border: 1px solid var(--border); align-self: center; animation: blink 1s infinite; }

/* TYPING INDICATOR */
.typing-indicator { min-height: 28px; padding: 0 24px 4px; font-size: 12px; color: var(--text-dim); display: flex; align-items: center; gap: 8px; background: var(--bg); }
.typing-indicator:empty { min-height: 0; padding: 0; }
.typing-name { color: var(--accent); font-size: 11px; letter-spacing: 0.04em; }
.typing-dots { display: flex; align-items: center; gap: 3px; }
.typing-dots span { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); display: inline-block; animation: typingBounce 1.2s infinite ease-in-out; }
.typing-dots span:nth-child(1) { animation-delay: 0s; }
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce { 0%, 60%, 100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-5px); opacity: 1; } }

/* REPLY PREVIEW BAR */
.reply-preview { display: none; align-items: center; justify-content: space-between; padding: 8px 20px; background: var(--surface2); border-top: 1px solid var(--border2); border-left: 3px solid var(--accent); gap: 10px; animation: slideUp 0.15s ease; }
.reply-preview.active { display: flex; }
@keyframes slideUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.reply-preview-inner { display: flex; align-items: center; gap: 8px; min-width: 0; }
.reply-icon { color: var(--accent); font-size: 14px; flex-shrink: 0; }
.reply-preview-text { font-size: 12px; color: var(--text-mid); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.reply-cancel-btn { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 14px; flex-shrink: 0; padding: 2px 6px; border-radius: 4px; transition: color 0.2s, background 0.2s; }
.reply-cancel-btn:hover { color: var(--red); background: rgba(255,94,122,0.1); }

/* REPLY BLOCK inside bubble */
.reply-block { display: flex; flex-direction: column; gap: 2px; padding: 6px 10px; margin-bottom: 6px; border-radius: 6px; border-left: 3px solid rgba(255,255,255,0.3); background: rgba(0,0,0,0.2); font-size: 12px; }
.msg.self .reply-block { border-left-color: rgba(255,255,255,0.4); }
.msg.other .reply-block { border-left-color: var(--accent); background: rgba(0,229,255,0.05); }
.reply-author { font-weight: 700; font-size: 11px; letter-spacing: 0.04em; }
.msg.self .reply-author { color: rgba(255,255,255,0.7); }
.msg.other .reply-author { color: var(--accent); }
.reply-content { color: var(--text-dim); font-size: 11px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.msg:hover .msg-bubble { cursor: pointer; }

/* MOBILE */
@media (max-width: 640px) {
  .join-card { margin: 16px; padding: 32px 24px; }
  .sidebar { position: fixed; top: 0; left: 0; height: 100dvh; z-index: 100; transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: block; }
  .chat-main { width: 100%; }
  .msg { max-width: 88%; }
  .input-bar { position: sticky; bottom: 0; z-index: 10; padding: 10px 14px; }
  .chat-header { height: 50px; padding: 0 12px; }
  .messages-area { padding: 12px 14px; }
  .msg-image { max-width: 200px; max-height: 160px; }
}