:root {
    --bg: #f6f7f9;
    --surface: #fff;
    --border: #e3e6eb;
    --text: #1f2328;
    --muted: #6b7280;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --success: #10b981;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.brand { font-weight: 600; font-size: 1.1rem; }

.nav { display: flex; gap: 1rem; flex: 1; }
.nav a {
    text-decoration: none;
    color: var(--muted);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
}
.nav a:hover { background: var(--bg); color: var(--text); }
.nav a.active { background: var(--primary); color: #fff; }

.user { display: flex; align-items: center; gap: 0.75rem; color: var(--muted); }
.inline { display: inline; }

.main {
    max-width: 1200px;
    margin: 1.5rem auto;
    padding: 0 1.5rem;
}

.flash {
    background: #eef2ff;
    border: 1px solid #c7d2fe;
    color: #3730a3;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow);
}

h2 { margin-top: 0; }
h3 { margin-top: 0; font-size: 1rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }

.form-grid {
    display: grid;
    gap: 0.75rem;
}
.form-grid label {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.9rem;
    color: var(--muted);
}
.form-grid small { color: var(--muted); font-weight: 400; }
.form-grid input {
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    color: var(--text);
    background: #fff;
}
.form-grid input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    color: var(--text);
    cursor: pointer;
    font-size: 0.9rem;
}
.btn:hover { background: var(--bg); }
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-danger {
    background: #fff;
    border-color: var(--danger);
    color: var(--danger);
}
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--muted);
}
.btn-ghost:hover { background: var(--bg); color: var(--text); }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}
.data-table th, .data-table td {
    padding: 0.6rem 0.5rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}
.data-table th {
    font-size: 0.8rem;
    color: var(--muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.data-table .id { color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.data-table .keywords { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.data-table .chatid { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.85rem; }
.data-table .content { max-width: 260px; word-wrap: break-word; }
.data-table .when { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; white-space: nowrap; }

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

.actions {
    white-space: nowrap;
    display: flex;
    gap: 0.4rem;
    align-items: flex-start;
}
.actions details {
    display: inline-block;
}
.actions details summary {
    list-style: none;
    cursor: pointer;
    display: inline-block;
}
.actions details summary::-webkit-details-marker { display: none; }
.actions .edit-form {
    margin-top: 0.6rem;
    padding: 0.8rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    min-width: 320px;
}

.login-box {
    max-width: 360px;
    margin: 6rem auto;
    padding: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
}
.login-box h2 { margin-top: 0; }
.login-box form { display: flex; flex-direction: column; gap: 0.9rem; }
.login-box label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--muted); }
.login-box input {
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
}
.login-box .btn-primary { margin-top: 0.3rem; }
.error {
    color: var(--danger);
    font-size: 0.9rem;
    margin: 0;
}