:root {
    --green: #25d366;
    --green-dark: #128c7e;
    --bg: #f4f6f7;
    --card-bg: #ffffff;
    --text: #1a1a1a;
    --muted: #6b7280;
    --border: #e2e5e8;
    --danger: #d9534f;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.hidden { display: none !important; }

/* Login */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--green-dark), var(--green));
}
.login-box {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 360px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.login-box input {
    width: 100%;
    padding: 0.7rem;
    margin: 0.8rem 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
}
.error-text { color: var(--danger); font-size: 0.9rem; min-height: 1.2em; }

/* App shell */
.app-header {
    background: var(--green-dark);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.app-header h1 { margin: 0; font-size: 1.3rem; }

.tabs {
    display: flex;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}
.tab-btn {
    padding: 0.9rem 1.2rem;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--muted);
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}
.tab-btn.active {
    color: var(--green-dark);
    border-bottom-color: var(--green);
    font-weight: 600;
}

.tab-panel { display: none; padding: 1.5rem; }
.tab-panel.active { display: block; }

.panel-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 1.5rem;
    align-items: start;
}
@media (max-width: 900px) {
    .panel-grid { grid-template-columns: 1fr; }
}

.card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 1.2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.card h2 { margin-top: 0; font-size: 1.05rem; }

form { display: flex; flex-direction: column; gap: 0.6rem; }
form input, form select, form textarea {
    padding: 0.6rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    width: 100%;
}
form label { font-size: 0.85rem; color: var(--muted); margin-top: 0.4rem; }
textarea { min-height: 70px; resize: vertical; }

button {
    background: var(--green);
    color: white;
    border: none;
    padding: 0.65rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
}
button:hover { background: var(--green-dark); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #d0d4d8; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b8433f; }

.hint { color: var(--muted); font-size: 0.85rem; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.data-table th, .data-table td {
    text-align: left;
    padding: 0.5rem 0.4rem;
    border-bottom: 1px solid var(--border);
}
.data-table th { color: var(--muted); font-weight: 600; }

.status-badge {
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 600;
}
.status-success { background: #e6f7ec; color: #1a7f37; }
.status-failed { background: #fde8e8; color: var(--danger); }
.status-active { background: #e6f7ec; color: #1a7f37; }
.status-paused { background: #f1f2f4; color: var(--muted); }

.variable-row {
    display: flex;
    gap: 0.4rem;
    align-items: center;
}
.variable-row select { width: 40%; }
.variable-row input { flex: 1; }
.variable-row button { padding: 0.4rem 0.6rem; }

.row-actions { display: flex; gap: 0.4rem; }
.row-actions button { padding: 0.35rem 0.6rem; font-size: 0.8rem; }