:root {
    --bg: #f4f7f2;
    --card: #ffffff;
    --ink: #1d2a22;
    --muted: #637067;
    --line: #dfe7dd;
    --green: #2f8f2f;
    --green-dark: #1d5d28;
    --blue: #285a7a;
    --danger: #b42318;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
}

.shell {
    width: min(1120px, calc(100% - 32px));
    margin: 32px auto;
}

.brand {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 22px;
}

.eyebrow {
    margin: 0 0 6px;
    color: var(--green-dark);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
}

h1,
h2 {
    margin: 0;
}

.lead {
    margin: 8px 0 0;
    color: var(--muted);
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 16px 40px rgba(29, 42, 34, 0.06);
}

.auth-card {
    max-width: 420px;
    padding: 24px;
}

label {
    display: grid;
    gap: 8px;
    color: var(--muted);
    font-size: 14px;
}

input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 12px 14px;
    font: inherit;
}

button,
.admin-link {
    border: 0;
    border-radius: 6px;
    background: var(--green);
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    font-weight: 700;
    text-decoration: none;
}

button:hover,
.admin-link:hover {
    background: var(--green-dark);
}

.chat-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 20px;
}

.chat-card {
    min-height: 620px;
    display: grid;
    grid-template-rows: 1fr auto;
}

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

.bubble {
    max-width: 76%;
    border-radius: 8px;
    padding: 10px 12px;
    line-height: 1.38;
    white-space: pre-line;
}

.pedro {
    align-self: flex-start;
    background: #e9f4e5;
}

.client {
    align-self: flex-end;
    background: #e8f0f7;
}

.system {
    align-self: center;
    background: #f7ecd5;
    color: #5d4314;
    max-width: 92%;
}

.chat-form {
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    padding: 14px;
}

.helper {
    padding: 18px;
    align-self: start;
}

.helper h2 {
    font-size: 18px;
    margin-bottom: 12px;
}

.helper button {
    width: 100%;
    margin: 6px 0;
    background: var(--blue);
}

.helper button:hover {
    background: #1d415a;
}

.error {
    color: var(--danger);
    font-weight: 700;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--line);
    padding: 18px;
}

.conversation {
    display: grid;
    gap: 12px;
    padding: 18px;
    border-bottom: 1px solid var(--line);
}

.conversation div,
.conversation form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.conversation span {
    color: var(--muted);
}

pre {
    margin: 0;
    background: #f7f8f5;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 12px;
    white-space: pre-wrap;
}

details {
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 10px 12px;
}

summary {
    cursor: pointer;
    font-weight: 700;
}

.transcript {
    display: grid;
    gap: 8px;
    margin-top: 12px;
}

.transcript p {
    margin: 0;
    color: var(--ink);
}

@media (max-width: 760px) {
    .brand,
    .chat-layout {
        display: block;
    }

    .admin-link,
    .helper {
        margin-top: 14px;
    }

    .chat-card {
        min-height: 560px;
    }

    .chat-form {
        grid-template-columns: 1fr;
    }

    .bubble {
        max-width: 92%;
    }
}