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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    height: 100vh;
    overflow: hidden;
}

.screen { display: none; height: 100vh; flex-direction: column; }
.screen.active { display: flex; }

/* LOGIN */
.login-box {
    margin: auto;
    text-align: center;
    padding: 2rem;
}
.login-box h1 { font-size: 3rem; color: #fff; }
.login-box h1 span { color: #6366f1; }
.login-box p { color: #94a3b8; margin-bottom: 2rem; }
.login-box input {
    display: block;
    width: 200px;
    margin: 0 auto 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid #334155;
    background: #1e293b;
    color: #fff;
    font-size: 1.2rem;
    text-align: center;
    letter-spacing: 0.5rem;
}
.login-box button {
    background: #6366f1;
    color: #fff;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    width: 200px;
}

/* HEADER */
header {
    background: #1e293b;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #334155;
}
header h2 { font-size: 1.1rem; }
header span { color: #94a3b8; font-size: 0.85rem; }
header button {
    background: none;
    border: none;
    color: #6366f1;
    cursor: pointer;
    font-size: 0.95rem;
}
.status { color: #22c55e !important; }

/* CARDS */
.cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 1rem;
}
.card {
    background: #1e293b;
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid #334155;
}
.card.mrr { grid-column: 1 / -1; }
.label { display: block; color: #94a3b8; font-size: 0.8rem; margin-bottom: 0.5rem; }
.value { display: block; font-size: 2rem; font-weight: 700; color: #fff; }
.progress-bar {
    background: #334155;
    border-radius: 99px;
    height: 8px;
    margin: 0.75rem 0 0.5rem;
}
.progress-fill {
    background: #6366f1;
    height: 100%;
    border-radius: 99px;
    width: 0%;
    transition: width 1s ease;
}
.meta { color: #94a3b8; font-size: 0.8rem; }

/* TAREAS */
.tareas {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
}
.tareas h3 { color: #94a3b8; font-size: 0.85rem; margin-bottom: 0.75rem; text-transform: uppercase; }
.empty { color: #475569; font-size: 0.9rem; }

/* NAV */
nav {
    display: flex;
    background: #1e293b;
    border-top: 1px solid #334155;
}
nav button {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    font-size: 0.9rem;
}
nav button.active { color: #6366f1; border-top: 2px solid #6366f1; }

/* CHAT */
#mensajes {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.msg {
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.5;
}
.msg.user { background: #6366f1; align-self: flex-end; }
.msg.ceo { background: #1e293b; border: 1px solid #334155; align-self: flex-start; }
.msg.loading { color: #94a3b8; }

.input-area {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    background: #1e293b;
    border-top: 1px solid #334155;
}
.input-area input {
    flex: 1;
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 0.75rem;
    color: #fff;
    font-size: 0.95rem;
}
.input-area button {
    background: #6366f1;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.25rem;
    cursor: pointer;
}