:root {
    --bg-body: #f4f7f9;
    --bg-app: #ffffff;
    --nav-bg: #1a1c23;
    --accent: #0062ff;
    --text-dark: #2d3436;
    --text-light: #636e72;
    --msg-user: #0062ff;
    --msg-sys: #f1f3f5;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-dark);
    height: 100vh;
    overflow: hidden;
}

/* Navbar */
.navbar {
    background: var(--nav-bg);
    color: white;
    padding: 12px 20px;
}

.nav-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link { text-decoration: none; color: inherit; }
.logo { font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 1.3rem; }
.logo span { color: var(--accent); }
.logo small { font-size: 0.65rem; display: block; font-weight: 400; opacity: 0.6; }

.nav-links { display: flex; gap: 12px; }

.btn-telegram, .btn-contact {
    text-decoration: none;
    color: white;
    font-size: 0.8rem;
    padding: 8px 16px;
    border-radius: 6px;
    background: rgba(255,255,255,0.1);
    transition: 0.2s;
}

.btn-telegram:hover { background: #0088cc; }
.btn-contact:hover { background: var(--accent); }

/* Chat Layout */
.app-container {
    max-width: 1100px;
    margin: 0 auto;
    background: var(--bg-app);
    height: calc(100vh - 65px);
    display: flex;
    flex-direction: column;
}

.chat-window {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message {
    max-width: 75%;
    padding: 14px 20px;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.6;
}

.user-msg {
    align-self: flex-end;
    background: var(--msg-user);
    color: white;
    box-shadow: 0 4px 12px rgba(0,98,255,0.2);
}

.system-msg {
    align-self: flex-start;
    background: var(--msg-sys);
    color: var(--text-dark);
    border: 1px solid #e9ecef;
}

/* Input */
.input-area {
    padding: 20px 30px 30px;
    border-top: 1px solid #eee;
}

.input-container {
    display: flex;
    background: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 8px;
    gap: 10px;
}

textarea {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px;
    font-size: 1rem;
    outline: none;
    resize: none;
}

#send-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0 20px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
}

@media (max-width: 600px) {
    .chat-window { padding: 15px; }
    .message { max-width: 90%; }
}

/* ... (mantener lo anterior y añadir esto) ... */

.admin-bar {
    background: #f8f9fa;
    padding: 10px 25px;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.btn-admin {
    background: white;
    border: 1px solid #ddd;
    padding: 5px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.75rem;
    transition: 0.2s;
}

.btn-admin:hover { background: #eee; border-color: #bbb; }
.btn-danger:hover { background: #ffe3e3; color: #d63031; border-color: #fab1a0; }

.status-msg { margin-left: auto; font-weight: 600; font-size: 0.75rem; }
.status-success { color: #27ae60; }
.status-error { color: #e74c3c; }

/* Animación de carga para el botón */
.loading { opacity: 0.5; pointer-events: none; cursor: wait; }