:root {
    --ink: #1b2a2a;
    --ink-soft: #3d4d4d;
    --paper: #f4efe6;
    --paper-2: #fffdf8;
    --line: #d9d0c2;
    --teal: #1f6b63;
    --teal-dark: #154a45;
    --copper: #b86b3d;
    --sidebar: #14201f;
    --danger: #9b3a2f;
    --ok: #2f6b46;
    --shadow: 0 18px 40px rgba(20, 32, 31, 0.08);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    background: var(--paper);
    color: var(--ink);
    font-family: "Source Sans 3", "Segoe UI", sans-serif;
}

a { color: var(--teal-dark); }

h1, h2, h3, .serif {
    font-family: "Fraunces", "Palatino Linotype", Georgia, serif;
    letter-spacing: -0.02em;
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 32px 16px;
    background:
        radial-gradient(circle at 10% 10%, #e7efe8 0, transparent 32%),
        radial-gradient(circle at 90% 80%, #f0e0d2 0, transparent 28%),
        var(--paper);
}

.auth-card {
    width: min(440px, 100%);
    background: var(--paper-2);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 40px 36px;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
}

.brand-mark span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--copper);
    box-shadow: 10px 0 0 var(--teal);
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 260px 1fr;
}

.sidebar {
    background: var(--sidebar);
    color: #efe8dc;
    padding: 28px 20px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.sidebar nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sidebar a, .sidebar button.linkish {
    color: #d8cfc0;
    text-decoration: none;
    padding: 10px 12px;
    border: 0;
    background: transparent;
    text-align: left;
    font: inherit;
    cursor: pointer;
}

.sidebar a.active, .sidebar a:hover {
    background: rgba(255, 253, 248, 0.08);
    color: #fff;
}

.sidebar .tagline {
    color: #b7aea0;
    font-size: 13px;
    margin: 8px 0 0;
}

.content {
    padding: 32px 36px 48px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 28px;
}

.muted { color: var(--ink-soft); }

.grid-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}

.card, .stat, .panel {
    background: var(--paper-2);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.stat, .panel, .card { padding: 20px; }

.stat strong {
    display: block;
    font-size: 32px;
    margin-top: 8px;
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    text-align: left;
    padding: 12px 8px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

th { color: var(--ink-soft); font-size: 13px; font-weight: 600; }

.btn, .btn-secondary, .btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    border: 0;
    cursor: pointer;
    text-decoration: none;
    font: inherit;
}

.btn { background: var(--teal); color: #fff; }
.btn:hover { background: var(--teal-dark); }
.btn-secondary { background: #ece4d7; color: var(--ink); }
.btn-danger { background: var(--danger); color: #fff; }

.field { margin-bottom: 16px; }
.field label { display: block; margin-bottom: 6px; font-weight: 600; }
.field input, .field textarea, .field select {
    width: 100%;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    padding: 10px 12px;
    font: inherit;
}

.field textarea { min-height: 110px; resize: vertical; }
.field .hint { margin: 6px 0 0; font-size: 13px; color: var(--ink-soft); }
.flash { background: #e5efe6; border: 1px solid #b8d0bc; padding: 12px 14px; margin-bottom: 18px; }
.errors { color: var(--danger); margin: 0 0 16px; padding-left: 18px; }
.badge { display: inline-block; padding: 3px 8px; background: #ece4d7; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.badge.ready, .badge.active, .badge.converted { background: #d9eadc; }
.badge.pending, .badge.processing { background: #efe4c8; }
.badge.failed, .badge.inactive, .badge.closed { background: #f0d9d4; }
.knowledge-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}
.knowledge-row:last-of-type { border-bottom: 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.embed { background: #14201f; color: #efe8dc; padding: 16px; overflow: auto; font-size: 13px; }
.chat-log { display: flex; flex-direction: column; gap: 12px; }
.bubble { max-width: 80%; padding: 12px 14px; }
.bubble.user { margin-left: auto; background: #e7efe8; }
.bubble.assistant { background: #f3e8dc; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.filters input, .filters select { min-height: 42px; border: 1px solid var(--line); background: #fff; padding: 0 10px; font: inherit; }

@media (max-width: 960px) {
    .app-shell { grid-template-columns: 1fr; }
    .grid-stats, .two-col { grid-template-columns: 1fr; }
    .content { padding: 20px 16px 36px; }
    .sidebar { padding: 18px 16px; }
}