:root {
    --bg: #0f1117;
    --bg-card: #1a1d27;
    --bg-input: #252833;
    --bg-hover: #2a2e3b;
    --border: #2e3345;
    --text: #e1e4ed;
    --text-muted: #8b90a0;
    --accent: #6c8aff;
    --accent-hover: #8ba3ff;
    --danger: #ff6b6b;
    --danger-hover: #ff8787;
    --success: #51cf66;
    --warning: #fcc419;
    --radius: 8px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

/* Layout */
.app { display: flex; min-height: 100vh; }

.sidebar {
    width: 240px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px 0;
    flex-shrink: 0;
}

.sidebar-logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo svg { flex-shrink: 0; }

.sidebar-logo h1 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.sidebar-logo span {
    font-size: 11px;
    color: var(--text-muted);
    display: block;
}

.nav-section {
    padding: 8px 12px 4px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-muted);
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 20px;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 13px;
    transition: all 0.15s;
    border-left: 3px solid transparent;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text); }
.nav-item.active {
    color: var(--accent);
    background: rgba(108, 138, 255, 0.08);
    border-left-color: var(--accent);
}

.nav-item svg { width: 16px; height: 16px; flex-shrink: 0; }

.sidebar-footer {
    margin-top: auto;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.user-info {
    font-size: 12px;
    color: var(--text-muted);
}

.user-info strong {
    display: block;
    color: var(--text);
    font-size: 13px;
    margin-bottom: 2px;
}

.btn-logout {
    margin-top: 10px;
    width: 100%;
    padding: 7px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.15s;
}

.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

.main { flex: 1; display: flex; flex-direction: column; overflow-y: auto; }

.topbar {
    padding: 16px 32px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h2 { font-size: 18px; font-weight: 600; }

.api-url-display {
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--mono);
    background: var(--bg-input);
    padding: 4px 10px;
    border-radius: var(--radius);
    cursor: pointer;
}

.api-url-display:hover { color: var(--text); }

.content { padding: 32px; flex: 1; }

/* Login */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-card h1 {
    font-size: 22px;
    margin-bottom: 4px;
}

.login-card p {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 28px;
}

/* Forms */
.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 13px;
    font-family: var(--font);
    outline: none;
    transition: border-color 0.15s;
}

.form-group textarea {
    font-family: var(--mono);
    font-size: 12px;
    resize: vertical;
    min-height: 120px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #555;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* Buttons */
.btn {
    padding: 9px 18px;
    border-radius: var(--radius);
    border: none;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-muted); }

.btn-sm { padding: 5px 12px; font-size: 12px; }

.btn-block { width: 100%; justify-content: center; }

.btn-group { display: flex; gap: 8px; }

/* Cards & Tables */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h3 { font-size: 15px; font-weight: 600; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

th {
    text-align: left;
    padding: 10px 12px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
}

.empty-state svg { margin-bottom: 12px; opacity: 0.4; }
.empty-state p { font-size: 13px; }

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-created { background: rgba(108,138,255,0.15); color: var(--accent); }
.badge-processing { background: rgba(252,196,25,0.15); color: var(--warning); }
.badge-completed { background: rgba(81,207,102,0.15); color: var(--success); }
.badge-failed { background: rgba(255,107,107,0.15); color: var(--danger); }
.badge-received { background: rgba(81,207,102,0.15); color: var(--success); }
.badge-default { background: rgba(108,138,255,0.15); color: var(--accent); }
.badge-system { background: rgba(252,196,25,0.15); color: var(--warning); }

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 20px;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    width: 100%;
    max-width: 520px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal h3 {
    font-size: 16px;
    margin-bottom: 20px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 24px;
}

/* Toast */
.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 18px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    animation: slideIn 0.2s ease;
    min-width: 280px;
    max-width: 420px;
    word-break: break-word;
}

.toast-success { background: #1a3a1a; border: 1px solid #2d5a2d; color: var(--success); }
.toast-error { background: #3a1a1a; border: 1px solid #5a2d2d; color: var(--danger); }
.toast-info { background: #1a1a3a; border: 1px solid #2d2d5a; color: var(--accent); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Misc */
.mono { font-family: var(--mono); font-size: 12px; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 12px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.hidden { display: none !important; }

.truncate {
    max-width: 220px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Document detail */
.detail-grid {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 8px 16px;
    font-size: 13px;
}

.detail-grid dt {
    color: var(--text-muted);
    font-weight: 500;
}

.detail-grid dd {
    font-family: var(--mono);
    font-size: 12px;
    word-break: break-all;
}

/* Participant lookup result */
.lookup-result {
    margin-top: 16px;
    padding: 16px;
    background: rgba(81,207,102,0.08);
    border: 1px solid rgba(81,207,102,0.2);
    border-radius: var(--radius);
}

.lookup-result.not-found {
    background: rgba(255,107,107,0.08);
    border-color: rgba(255,107,107,0.2);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }