:root {
  /* Dark Theme Colors */
  --bg-main: #0b141a;
  --bg-sidebar: #111b21;
  --bg-topbar: #202c33;
  --text-color: #e9edef;
  --input-bg: #2a3942;
  --primary: #00a884;
}

.light-theme {
  --bg-main: #f0f2f5;
  --bg-sidebar: #ffffff;
  --bg-topbar: #ededed;
  --text-color: #3b4a54;
  --input-bg: #ffffff;
  --primary: #008069;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Helvetica, sans-serif;
  background: var(--bg-main);
  color: var(--text-color);
  transition: background 0.3s ease;
}

.topbar {
  height: 55px;
  background: var(--bg-topbar);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  border-bottom: 1px solid rgba(0,0,0,0.1);
}

/* THEME BUTTON */
.theme-btn {
  background: var(--input-bg);
  border: 1px solid #555;
  color: var(--text-color);
  padding: 8px 15px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s;
}

.theme-btn:hover { transform: scale(1.05); }

.main {
  display: grid;
  grid-template-columns: 250px 1fr 250px;
  height: calc(100vh - 55px);
  overflow: hidden; /* Prevents unwanted scrollbars */ [cite: 4, 5]
}

/* CENTER COLUMN - This is the wrapper for your panels */
.center {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.center .home {
  margin: auto;
}

/* Ensure buttons within the group are aligned properly */
.btn-group {
  display: flex;
  gap: 12px;
  justify-content: center; [cite: 11]
}

.btn-group button {
  flex: 1; /* Makes both buttons equal width */ [cite: 12, 13]
  min-width: 120px;
}

/* Input styling for better visibility */
input {
  width: 100%;
  box-sizing: border-box; /* Fixes input overflow issues */ 
  padding: 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  background: var(--input-bg);
  color: var(--text-color); [cite: 9, 10]
}

.rooms, .users {
  background: var(--bg-sidebar);
  padding: 20px;
  overflow-y: auto;
}

/* BOXES & BUTTONS */
.home {
  margin: auto;
  width: 380px;
  background: var(--bg-topbar);
  padding: 40px;
  border-radius: 24px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
  gap: 15px;
}

/* CHAT INPUT BAR */
.input-area {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 15px;
  background: var(--bg-topbar);
  border-top: 1px solid rgba(255,255,255,0.05);
}

/* INPUT FIELD */
.input-area input {
  flex: 1;
  padding: 12px 16px;
  border-radius: 25px;
  border: none;
  outline: none;
  background: var(--input-bg);
  color: var(--text-color);
  font-size: 14px;
  transition: 0.2s;
}

/* INPUT FOCUS */
.input-area input:focus {
  box-shadow: 0 0 0 2px rgba(0,168,132,0.4);
}

/* SEND BUTTON */
.input-area button {
  background: var(--primary);
  border: none;
  color: white;
  padding: 10px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
}

/* HOVER */
.input-area button:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0,168,132,0.4);
}

/* CLICK */
.input-area button:active {
  transform: scale(0.95);
}

.primary-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
}

.secondary-btn {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
}

.chat-box {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* CHAT HEADER FIX */
.chat-header {
  display: flex;
  justify-content: space-between; /* THIS fixes alignment */
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-topbar);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* ROOM NAME */
#roomTitle {
  font-size: 16px;
  font-weight: 500;
}

/* LEAVE BUTTON */
.leave-btn {
  background: #e74c3c;
  color: white;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
}

/* HOVER */
.leave-btn:hover {
  background: #c0392b;
}

.chat {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.message {
  padding: 10px 15px;
  border-radius: 12px;
  max-width: 65%;
  font-size: 14.5px;
  line-height: 1.4;
}

.sent { align-self: flex-end; background: #005c4b; color: white; }
.received { align-self: flex-start; background: var(--bg-topbar); }

.hidden {
  display: none !important;
}