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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #0d1117;
    color: #e6edf3;
    min-height: 100vh;
}

#app { max-width: 1200px; margin: 0 auto; padding: 20px; }

header { margin-bottom: 20px; }
header h1 { font-size: 1.5rem; color: #58a6ff; }

/* ─── Toolbar ─────────────────────────────────────────────────────────────── */

#toolbar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.btn {
    padding: 8px 16px;
    border: 1px solid #30363d;
    background: #21262d;
    color: #e6edf3;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background 0.15s;
}
.btn:hover:not(:disabled) { background: #30363d; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: #238636; border-color: #238636; }
.btn-primary:hover:not(:disabled) { background: #2ea043; }
.btn-danger { background: #da3633; border-color: #da3633; }
.btn-danger:hover:not(:disabled) { background: #f85149; }

/* ─── Grid ───────────────────────────────────────────────────────────────── */

#task-grid {
    border: 1px solid #30363d;
    border-radius: 8px;
    overflow: hidden;
}

.grid-header {
    display: grid;
    grid-template-columns: 50px 2fr 1.5fr 90px 80px 80px 90px;
    background: #161b22;
    font-weight: 600;
    font-size: 0.8rem;
    color: #8b949e;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.grid-row {
    display: grid;
    grid-template-columns: 50px 2fr 1.5fr 90px 80px 80px 90px;
    border-top: 1px solid #21262d;
    cursor: pointer;
    transition: background 0.1s;
}
.grid-row:hover { background: #161b22; }
.grid-row.selected { background: #1f6feb22; border-left: 3px solid #58a6ff; }
.grid-row.empty { display: block; padding: 24px; text-align: center; color: #484f58; cursor: default; }

.grid-cell {
    padding: 10px 12px;
    display: flex;
    align-items: center;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: 0.875rem;
}

.col-reward, .col-cost, .col-profit { justify-content: flex-end; font-variant-numeric: tabular-nums; }
.col-profit { color: #3fb950; font-weight: 600; }
.col-cost { color: #f85149; }

/* ─── Modal ─────────────────────────────────────────────────────────────── */

.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal.active { display: flex; }

.modal-content {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 12px;
    padding: 28px;
    width: 100%;
    max-width: 640px;
    max-height: 90vh;
    overflow-y: auto;
}
.modal-content h2 { margin-bottom: 20px; font-size: 1.1rem; color: #58a6ff; }

/* ─── Form ───────────────────────────────────────────────────────────────── */

.form-row {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}
.form-group.flex-1 { flex: 1; }
.form-group.flex-2 { flex: 2; }
.form-group label { font-size: 0.75rem; color: #8b949e; text-transform: uppercase; letter-spacing: 0.05em; }

input, textarea, select {
    background: #0d1117;
    border: 1px solid #30363d;
    color: #e6edf3;
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.875rem;
    width: 100%;
    transition: border-color 0.15s;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #58a6ff;
}
textarea { resize: vertical; min-height: 50px; }
select { cursor: pointer; }

.modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    justify-content: flex-end;
}

/* ─── Status ─────────────────────────────────────────────────────────────── */

#status-message {
    margin-top: 12px;
    font-size: 0.8rem;
    min-height: 1.2em;
    color: #8b949e;
}