:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --success-color: #10b981;
    --border-color: #334155;
    --avatar-size: 64px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    line-height: 1.5;
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

header {
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 8px;
}

.highlight {
    color: var(--accent-color);
}

header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

main {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

#lobby-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
}

.card {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, opacity 0.3s ease;
}

h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: background-color 0.2s ease, transform 0.1s ease;
    font-family: inherit;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn.primary {
    background-color: var(--accent-color);
    color: white;
}

.btn.primary:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.btn.secondary {
    background-color: var(--text-primary);
    color: var(--bg-color);
}

.btn.secondary:hover:not(:disabled) {
    background-color: #e2e8f0;
}

.btn.danger {
    background-color: var(--danger-color);
    color: white;
}

.btn.danger:hover:not(:disabled) {
    background-color: var(--danger-hover);
}

.btn.icon-btn {
    width: auto;
    padding: 8px;
    background-color: transparent;
    color: var(--text-secondary);
}

.btn.icon-btn:hover {
    color: var(--text-primary);
    background-color: var(--border-color);
}

.hidden {
    display: none !important;
}

#audio-container {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* Code Container Styles */
#room-code-container {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.code-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #0f172a;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
}

#room-code {
    font-family: monospace;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent-color);
}

.status-text {
    font-size: 0.85rem;
    text-align: center;
}

.status-text.waiting {
    color: var(--text-secondary);
    animation: pulse-text 2s infinite;
}

@keyframes pulse-text {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* Input Group Styles */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

input[type="text"] {
    flex: 1;
    background-color: #0f172a;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.2s;
    width: 100%;
}

input[type="text"]#input-code {
    font-family: monospace;
    text-transform: uppercase;
}

input[type="text"]:focus {
    border-color: var(--accent-color);
}

.error-text {
    color: var(--danger-color) !important;
    font-size: 0.85rem !important;
    margin-top: 8px !important;
    margin-bottom: 0 !important;
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--text-secondary);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.divider span {
    padding: 0 16px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Active Call Panel */
.active-call-panel {
    display: flex;
    flex-direction: column;
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.call-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

/* Users Grid */
.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
    justify-items: center;
}

.user-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.avatar-ring {
    position: relative;
    width: var(--avatar-size);
    height: var(--avatar-size);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-ring.speaking::before {
    content: '';
    position: absolute;
    left: -4px;
    top: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: 50%;
    border: 2px solid var(--success-color);
    animation: pulse-ring 1.5s infinite ease-out;
}

.avatar {
    width: 100%;
    height: 100%;
    background-color: var(--border-color);
    color: var(--text-primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 600;
    text-transform: uppercase;
    z-index: 2;
    position: relative;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.user-card.local .avatar {
    background-color: var(--accent-color);
}

.user-card.muted .avatar {
    opacity: 0.5;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
    max-width: 100px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-card.muted .user-name {
    color: var(--danger-color);
}

@keyframes pulse-ring {
    0% { transform: scale(0.9); opacity: 1; }
    100% { transform: scale(1.3); opacity: 0; }
}

.controls {
    display: flex;
    gap: 12px;
    margin-top: auto;
    flex-wrap: wrap;
}

.control-btn {
    flex: 1;
    min-width: 100px;
}

.muted {
    background-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
}

/* --- NUEVOS ESTILOS PARA AJUSTES Y CHAT --- */
.main-layout {
    max-width: 900px;
    flex-direction: row;
    align-items: flex-start;
}
.call-container { flex: 1; min-width: 320px; display: flex; flex-direction: column; gap: 32px; }
.chat-container {
    flex: 1; min-width: 300px; max-width: 400px;
    background-color: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    display: flex; flex-direction: column;
    height: 80vh; max-height: 700px;
    overflow: hidden;
}
@media (max-width: 768px) {
    .container { padding: 12px; }
    .main-layout { flex-direction: column; max-width: 100%; }
    .call-container { min-width: 100%; gap: 16px; }
    .users-grid { gap: 12px; grid-template-columns: repeat(auto-fit, minmax(80px, 1fr)); }
    .controls { flex-direction: column; gap: 8px; }
    .control-btn { padding: 12px; font-size: 1rem; width: 100%; }
    .chat-container {
        position: fixed; top: 0; left: 0; right: 0; bottom: 0;
        height: 100%; height: 100dvh; max-width: 100%;
        border-radius: 0; z-index: 100;
        background-color: var(--bg-color);
    }
    .mobile-only { display: inline-flex !important; }
}
.mobile-only { display: none; }

.chat-header {
    padding: 16px; border-bottom: 1px solid var(--border-color);
    display: flex; justify-content: space-between; align-items: center;
    background-color: var(--card-bg);
}
.chat-messages {
    flex: 1; padding: 16px; overflow-y: auto;
    display: flex; flex-direction: column; gap: 12px;
}
.chat-msg {
    background-color: var(--bg-color); padding: 10px 14px;
    border-radius: 12px; font-size: 0.9rem;
    border: 1px solid var(--border-color);
    word-break: break-word;
}
.chat-msg strong { color: var(--accent-color); margin-bottom: 4px; display: block;}
.chat-input-area {
    padding: 16px; border-top: 1px solid var(--border-color);
    display: flex; gap: 8px; background-color: var(--card-bg);
}
.chat-input-area input { flex: 1; min-width: 0; }
.chat-input-area .btn { width: auto; flex: none; }

.call-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px;}
.call-header h2 { margin-bottom: 0; }
.settings-panel {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px; margin-bottom: 20px;
    display: flex; flex-direction: column; gap: 12px;
}
.setting-row { display: flex; flex-direction: column; gap: 8px; font-size: 0.9rem;}
.setting-row input[type=range] { width: 100%; accent-color: var(--accent-color); }